Merge branch 'master' into graphics_buffer_update

.github/ISSUE_TEMPLATE.md

@@ -1,5 +1,5 @@
 ---
-name: Bug report
+name: Old Bug report
 about: Create a report to help us fix issues.
 title: ''
 labels: 'Type: Bug'

.github/ISSUE_TEMPLATE/bugreport.yaml

@@ -1,7 +1,6 @@
 name: Bug Report
 description: Create a report to help us fix issues.
 labels: "Type: Bug"
-issue_body: true
 body:
 - type: markdown
   attributes:
@@ -15,7 +14,7 @@ body:
   attributes:
     label: Application Version
     description: The version of Cura this issue occurs with.
-    placeholder: 4.8.0
+    placeholder: 4.9.0
   validations:
     required: true
 - type: input
@@ -56,13 +55,28 @@ body:
 - type: markdown
   attributes:
     value: |
-      ## Additional information & file uploads
-      
       Please be sure to add the following files:
         * For slicing issues, upload a **project file** that clearly shows the bug. 
           To save a project file go to `File -> Save project`. Please make sure to .zip your project file. For big files you may need to use WeTransfer or similar file sharing sites. 
           G-code files are not project files!
         * **Screenshots** of showing the problem, perhaps before/after images.
-        * A **log file**, see [here](https://github.com/Ultimaker/Cura#logging-issues) how to find the log file. 
+        * A **log file** for crashes and similar issues.
+          You can find your log file here:
+          Windows: `%APPDATA%\cura\<Cura version>\cura.log` or usually `C:\Users\\<your username>\AppData\Roaming\cura\<Cura version>\cura.log`
+          MacOS: `$USER/Library/Application Support/cura/<Cura version>/cura.log`
+          Ubuntu/Linus: `$USER/.local/share/cura/<Cura version>/cura.log` 
+          
+          If the Cura user interface still starts, you can also reach this directory from the application menu in Help -> Show settings folder 
+- type: checkboxes
+  attributes:
+    label: Checklist of files to include
+    options:
+      - label: Log file
+      - label: Project file
+- type: textarea
+  attributes:
+    label: Additional information & file uploads  
+    description: You can add these files and additional information that is relevant to the issue in the comments below.
+  validations:
+    required: true
 
-      You can add these files and additional information that is relevant to the issue in the comments below. 

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Have questions or need support?
+    url: https://community.ultimaker.com/
+    about: Please get in touch on our Ultimaker Community Forum!

.github/ISSUE_TEMPLATE/featurerequest.yaml

@@ -1,7 +1,6 @@
 name: Feature Request
 description: Suggest an idea for this project.
 labels: "Type: New Feature"
-issue_body: true
 body:
 - type: markdown
   attributes:
@@ -28,7 +27,7 @@ body:
 - type: textarea
   attributes:
     label: Describe alternatives you've considered
-    description: A clear and concise description of any alternative solutions or features you've considered. Again, if possible, think about why these alternatives are not working out.
+    description: A clear and concise description of any alternative solutions or features you've considered. If possible, think about why these alternatives are not working out.
     placeholder: The alternatives I've considered are...
   validations:
     required: true
@@ -39,8 +38,7 @@ body:
     placeholder: It will affect...
   validations:
     required: true
-- type: markdown
+- type: textarea
   attributes:
-    value: |
+    label: Additional information & file uploads
-      ## Additional information & file uploads
+    description: You can add pictures or files to visualize your feature request in the comments below.
-      You can add pictures or files to visualize your feature request in the comments below.

README.md

@@ -10,13 +10,13 @@ For crashes and similar issues, please attach the following information:
 
 * (On Windows) The log as produced by dxdiag (start -> run -> dxdiag -> save output)
 * The Cura GUI log file, located at
-  * `%APPDATA%\cura\<Cura version>\cura.log` (Windows), or usually `C:\Users\\<your username>\AppData\Roaming\cura\<Cura version>\cura.log`
+  * `%APPDATA%\cura\<Cura version>\cura.log` (Windows), or usually `C:\Users\<your username>\AppData\Roaming\cura\<Cura version>\cura.log`
-  * `$USER/Library/Application Support/cura/<Cura version>/cura.log` (OSX)
+  * `$HOME/Library/Application Support/cura/<Cura version>/cura.log` (OSX)
-  * `$USER/.local/share/cura/<Cura version>/cura.log` (Ubuntu/Linux)
+  * `$HOME/.local/share/cura/<Cura version>/cura.log` (Ubuntu/Linux)
 
 If the Cura user interface still starts, you can also reach this directory from the application menu in Help -> Show settings folder
 
-For additional support, you could also ask in the #cura channel on FreeNode IRC. For help with development, there is also the #cura-dev channel.
+For additional support, you could also ask in the [#cura channel](https://web.libera.chat/#cura) on [libera.chat](https://libera.chat/). For help with development, there is also the [#cura-dev channel](https://web.libera.chat/#cura-dev).
 
 Dependencies
 ------------
@@ -26,10 +26,16 @@ Dependencies
 * [PySerial](https://github.com/pyserial/pyserial) Only required for USB printing support.
 * [python-zeroconf](https://github.com/jstasiak/python-zeroconf) Only required to detect mDNS-enabled printers.
 
+For a list of required Python packages, with their recommended version, see `requirements.txt`.
+
+This list is not exhaustive at the moment, please check the links in the next section for more details.
+
 Build scripts
 -------------
 Please check out [cura-build](https://github.com/Ultimaker/cura-build) for detailed building instructions.
 
+If you want to build the entire environment from scratch before building Cura as well, [cura-build-environment](https://github.com/Ultimaker/cura-build) might be a starting point before cura-build. (Again, see cura-build for more details.)
+
 Running from Source
 -------------
 Please check our [Wiki page](https://github.com/Ultimaker/Cura/wiki/Running-Cura-from-Source) for details about running Cura from source.

cura/API/Account.py

@@ -40,7 +40,7 @@ class Account(QObject):
     """
 
     # The interval in which sync services are automatically triggered
-    SYNC_INTERVAL = 30.0  # seconds
+    SYNC_INTERVAL = 60.0  # seconds
     Q_ENUMS(SyncState)
 
     loginStateChanged = pyqtSignal(bool)
@@ -58,6 +58,11 @@ class Account(QObject):
     manualSyncEnabledChanged = pyqtSignal(bool)
     updatePackagesEnabledChanged = pyqtSignal(bool)
 
+    CLIENT_SCOPES = "account.user.read drive.backup.read drive.backup.write packages.download " \
+                    "packages.rating.read packages.rating.write connect.cluster.read connect.cluster.write " \
+                    "library.project.read library.project.write cura.printjob.read cura.printjob.write " \
+                    "cura.mesh.read cura.mesh.write"
+
     def __init__(self, application: "CuraApplication", parent = None) -> None:
         super().__init__(parent)
         self._application = application
@@ -79,10 +84,7 @@ class Account(QObject):
             CALLBACK_PORT=self._callback_port,
             CALLBACK_URL="http://localhost:{}/callback".format(self._callback_port),
             CLIENT_ID="um----------------------------ultimaker_cura",
-            CLIENT_SCOPES="account.user.read drive.backup.read drive.backup.write packages.download "
+            CLIENT_SCOPES=self.CLIENT_SCOPES,
-                          "packages.rating.read packages.rating.write connect.cluster.read connect.cluster.write "
-                          "library.project.read library.project.write cura.printjob.read cura.printjob.write "
-                          "cura.mesh.read cura.mesh.write",
             AUTH_DATA_PREFERENCE_KEY="general/ultimaker_auth_data",
             AUTH_SUCCESS_REDIRECT="{}/app/auth-success".format(self._oauth_root),
             AUTH_FAILED_REDIRECT="{}/app/auth-error".format(self._oauth_root)
@@ -107,7 +109,6 @@ class Account(QObject):
         self._authorization_service.accessTokenChanged.connect(self._onAccessTokenChanged)
         self._authorization_service.loadAuthDataFromPreferences()
 
-
     @pyqtProperty(int, notify=syncStateChanged)
     def syncState(self):
         return self._sync_state
@@ -176,6 +177,7 @@ class Account(QObject):
         if error_message:
             if self._error_message:
                 self._error_message.hide()
+            Logger.log("w", "Failed to login: %s", error_message)
             self._error_message = Message(error_message, title = i18n_catalog.i18nc("@info:title", "Login failed"))
             self._error_message.show()
             self._logged_in = False

cura/ApplicationMetadata.py

@@ -13,7 +13,7 @@ DEFAULT_CURA_DEBUG_MODE = False
 # Each release has a fixed SDK version coupled with it. It doesn't make sense to make it configurable because, for
 # example Cura 3.2 with SDK version 6.1 will not work. So the SDK version is hard-coded here and left out of the
 # CuraVersion.py.in template.
-CuraSDKVersion = "7.4.0"
+CuraSDKVersion = "7.6.0"
 
 try:
     from cura.CuraVersion import CuraAppName  # type: ignore

cura/Arranging/Nest2DArrange.py

@@ -36,6 +36,7 @@ def findNodePlacement(nodes_to_arrange: List["SceneNode"], build_volume: "BuildV
         found_solution_for_all: Whether the algorithm found a place on the buildplate for all the objects
         node_items: A list of the nodes return by libnest2d, which contain the new positions on the buildplate
     """
+    spacing = int(1.5 * factor)  # 1.5mm spacing.
 
     machine_width = build_volume.getWidth()
     machine_depth = build_volume.getDepth()
@@ -75,7 +76,7 @@ def findNodePlacement(nodes_to_arrange: List["SceneNode"], build_volume: "BuildV
         # Clip the disallowed areas so that they don't overlap the bounding box (The arranger chokes otherwise)
         clipped_area = area.intersectionConvexHulls(build_plate_polygon)
 
-        if clipped_area.getPoints() is not None:  # numpy array has to be explicitly checked against None
+        if clipped_area.getPoints() is not None and len(clipped_area.getPoints()) > 2:  # numpy array has to be explicitly checked against None
             for point in clipped_area.getPoints():
                 converted_points.append(Point(int(point[0] * factor), int(point[1] * factor)))
 
@@ -88,7 +89,7 @@ def findNodePlacement(nodes_to_arrange: List["SceneNode"], build_volume: "BuildV
         converted_points = []
         hull_polygon = node.callDecoration("getConvexHull")
 
-        if hull_polygon is not None and hull_polygon.getPoints() is not None:  # numpy array has to be explicitly checked against None
+        if hull_polygon is not None and hull_polygon.getPoints() is not None and len(hull_polygon.getPoints()) > 2:  # numpy array has to be explicitly checked against None
             for point in hull_polygon.getPoints():
                 converted_points.append(Point(point[0] * factor, point[1] * factor))
             item = Item(converted_points)
@@ -99,7 +100,7 @@ def findNodePlacement(nodes_to_arrange: List["SceneNode"], build_volume: "BuildV
     config = NfpConfig()
     config.accuracy = 1.0
 
-    num_bins = nest(node_items, build_plate_bounding_box, 10000, config)
+    num_bins = nest(node_items, build_plate_bounding_box, spacing, config)
 
     # Strip the fixed items (previously placed) and the disallowed areas from the results again.
     node_items = list(filter(lambda item: not item.isFixed(), node_items))

cura/Arranging/ShapeArray.py

@@ -3,7 +3,7 @@
 
 import numpy
 import copy
-from typing import Optional, Tuple, TYPE_CHECKING
+from typing import Optional, Tuple, TYPE_CHECKING, Union
 
 from UM.Math.Polygon import Polygon
 
@@ -14,14 +14,14 @@ if TYPE_CHECKING:
 class ShapeArray:
     """Polygon representation as an array for use with :py:class:`cura.Arranging.Arrange.Arrange`"""
 
-    def __init__(self, arr: numpy.array, offset_x: float, offset_y: float, scale: float = 1) -> None:
+    def __init__(self, arr: numpy.ndarray, offset_x: float, offset_y: float, scale: float = 1) -> None:
         self.arr = arr
         self.offset_x = offset_x
         self.offset_y = offset_y
         self.scale = scale
 
     @classmethod
-    def fromPolygon(cls, vertices: numpy.array, scale: float = 1) -> "ShapeArray":
+    def fromPolygon(cls, vertices: numpy.ndarray, scale: float = 1) -> "ShapeArray":
         """Instantiate from a bunch of vertices
 
         :param vertices:
@@ -98,7 +98,7 @@ class ShapeArray:
         return offset_shape_arr, hull_shape_arr
 
     @classmethod
-    def arrayFromPolygon(cls, shape: Tuple[int, int], vertices: numpy.array) -> numpy.array:
+    def arrayFromPolygon(cls, shape: Union[Tuple[int, int], numpy.ndarray], vertices: numpy.ndarray) -> numpy.ndarray:
         """Create :py:class:`numpy.ndarray` with dimensions defined by shape
 
         Fills polygon defined by vertices with ones, all other values zero
@@ -110,7 +110,7 @@ class ShapeArray:
         :return: numpy array with dimensions defined by shape
         """
 
-        base_array = numpy.zeros(shape, dtype = numpy.int32)  # Initialize your array of zeros
+        base_array = numpy.zeros(shape, dtype = numpy.int32)  # type: ignore # Initialize your array of zeros
 
         fill = numpy.ones(base_array.shape) * True  # Initialize boolean array defining shape fill
 
@@ -126,7 +126,7 @@ class ShapeArray:
         return base_array
 
     @classmethod
-    def _check(cls, p1: numpy.array, p2: numpy.array, base_array: numpy.array) -> Optional[numpy.array]:
+    def _check(cls, p1: numpy.ndarray, p2: numpy.ndarray, base_array: numpy.ndarray) -> Optional[numpy.ndarray]:
         """Return indices that mark one side of the line, used by arrayFromPolygon
 
         Uses the line defined by p1 and p2 to check array of

cura/AutoSave.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2019 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 from PyQt5.QtCore import QTimer
@@ -6,6 +6,8 @@ from typing import Any, TYPE_CHECKING
 
 from UM.Logger import Logger
 
+import time
+
 if TYPE_CHECKING:
     from cura.CuraApplication import CuraApplication
 
@@ -56,8 +58,8 @@ class AutoSave:
 
     def _onTimeout(self) -> None:
         self._saving = True # To prevent the save process from triggering another autosave.
-        Logger.log("d", "Autosaving preferences, instances and profiles")
 
+        save_start_time = time.time()
         self._application.saveSettings()
-
+        Logger.log("d", "Autosaving preferences, instances and profiles took %s seconds", time.time() - save_start_time)
         self._saving = False

cura/Backups/Backup.py

@@ -5,14 +5,16 @@ import io
 import os
 import re
 import shutil
+from copy import deepcopy
 from zipfile import ZipFile, ZIP_DEFLATED, BadZipfile
-from typing import Dict, Optional, TYPE_CHECKING
+from typing import Dict, Optional, TYPE_CHECKING, List
 
 from UM import i18nCatalog
 from UM.Logger import Logger
 from UM.Message import Message
 from UM.Platform import Platform
 from UM.Resources import Resources
+from UM.Version import Version
 
 if TYPE_CHECKING:
     from cura.CuraApplication import CuraApplication
@@ -27,6 +29,11 @@ class Backup:
     IGNORED_FILES = [r"cura\.log", r"plugins\.json", r"cache", r"__pycache__", r"\.qmlc", r"\.pyc"]
     """These files should be ignored when making a backup."""
 
+    IGNORED_FOLDERS = []  # type: List[str]
+
+    SECRETS_SETTINGS = ["general/ultimaker_auth_data"]
+    """Secret preferences that need to obfuscated when making a backup of Cura"""
+
     catalog = i18nCatalog("cura")
     """Re-use translation catalog"""
 
@@ -43,6 +50,9 @@ class Backup:
 
         Logger.log("d", "Creating backup for Cura %s, using folder %s", cura_release, version_data_dir)
 
+        # obfuscate sensitive secrets
+        secrets = self._obfuscate()
+
         # Ensure all current settings are saved.
         self._application.saveSettings()
 
@@ -67,8 +77,9 @@ class Backup:
         machine_count = max(len([s for s in files if "machine_instances/" in s]) - 1, 0)  # If people delete their profiles but not their preferences, it can still make a backup, and report -1 profiles. Server crashes on this.
         material_count = max(len([s for s in files if "materials/" in s]) - 1, 0)
         profile_count = max(len([s for s in files if "quality_changes/" in s]) - 1, 0)
-        plugin_count = len([s for s in files if "plugin.json" in s])
+        # We don't store plugins anymore, since if you can make backups, you have an account (and the plugins are
-
+        # on the marketplace anyway)
+        plugin_count = 0
         # Store the archive and metadata so the BackupManager can fetch them when needed.
         self.zip_file = buffer.getvalue()
         self.meta_data = {
@@ -78,6 +89,8 @@ class Backup:
             "profile_count": str(profile_count),
             "plugin_count": str(plugin_count)
         }
+        # Restore the obfuscated settings
+        self._illuminate(**secrets)
 
     def _makeArchive(self, buffer: "io.BytesIO", root_path: str) -> Optional[ZipFile]:
         """Make a full archive from the given root path with the given name.
@@ -85,8 +98,7 @@ class Backup:
         :param root_path: The root directory to archive recursively.
         :return: The archive as bytes.
         """
-
+        ignore_string = re.compile("|".join(self.IGNORED_FILES + self.IGNORED_FOLDERS))
-        ignore_string = re.compile("|".join(self.IGNORED_FILES))
         try:
             archive = ZipFile(buffer, "w", ZIP_DEFLATED)
             for root, folders, files in os.walk(root_path):
@@ -123,8 +135,8 @@ class Backup:
                                    "Tried to restore a Cura backup without having proper data or meta data."))
             return False
 
-        current_version = self._application.getVersion()
+        current_version = Version(self._application.getVersion())
-        version_to_restore = self.meta_data.get("cura_release", "master")
+        version_to_restore = Version(self.meta_data.get("cura_release", "master"))
 
         if current_version < version_to_restore:
             # Cannot restore version newer than current because settings might have changed.
@@ -134,8 +146,16 @@ class Backup:
                                    "Tried to restore a Cura backup that is higher than the current version."))
             return False
 
+        # Get the current secrets and store since the back-up doesn't contain those
+        secrets = self._obfuscate()
+
         version_data_dir = Resources.getDataStoragePath()
+        try:
             archive = ZipFile(io.BytesIO(self.zip_file), "r")
+        except LookupError as e:
+            Logger.log("d", f"The following error occurred while trying to restore a Cura backup: {str(e)}")
+            self._showMessage(self.catalog.i18nc("@info:backup_failed", "The following error occurred while trying to restore a Cura backup:") + str(e))
+            return False
         extracted = self._extractArchive(archive, version_data_dir)
 
         # Under Linux, preferences are stored elsewhere, so we copy the file to there.
@@ -146,6 +166,12 @@ class Backup:
             Logger.log("d", "Moving preferences file from %s to %s", backup_preferences_file, preferences_file)
             shutil.move(backup_preferences_file, preferences_file)
 
+        # Read the preferences from the newly restored configuration (or else the cached Preferences will override the restored ones)
+        self._application.readPreferencesFromConfiguration()
+
+        # Restore the obfuscated settings
+        self._illuminate(**secrets)
+
         return extracted
 
     @staticmethod
@@ -167,9 +193,36 @@ class Backup:
         Logger.log("d", "Removing current data in location: %s", target_path)
         Resources.factoryReset()
         Logger.log("d", "Extracting backup to location: %s", target_path)
+        name_list = archive.namelist()
+        for archive_filename in name_list:
             try:
-            archive.extractall(target_path)
+                archive.extract(archive_filename, target_path)
             except (PermissionError, EnvironmentError):
-            Logger.logException("e", "Unable to extract the backup due to permission or file system errors.")
+                Logger.logException("e", f"Unable to extract the file {archive_filename} from the backup due to permission or file system errors.")
-            return False
+            CuraApplication.getInstance().processEvents()
         return True
+
+    def _obfuscate(self) -> Dict[str, str]:
+        """
+        Obfuscate and remove the secret preferences that are specified in SECRETS_SETTINGS
+
+        :return: a dictionary of the removed secrets. Note: the '/' is replaced by '__'
+        """
+        preferences = self._application.getPreferences()
+        secrets = {}
+        for secret in self.SECRETS_SETTINGS:
+            secrets[secret.replace("/", "__")] = deepcopy(preferences.getValue(secret))
+            preferences.setValue(secret, None)
+        self._application.savePreferences()
+        return secrets
+
+    def _illuminate(self, **kwargs) -> None:
+        """
+        Restore the obfuscated settings
+
+        :param kwargs: a dict of obscured preferences. Note: the '__' of the keys will be replaced by '/'
+        """
+        preferences = self._application.getPreferences()
+        for key, value in kwargs.items():
+            preferences.setValue(key.replace("__", "/"), value)
+        self._application.savePreferences()

cura/Backups/BackupsManager.py

@@ -4,6 +4,7 @@
 from typing import Dict, Optional, Tuple, TYPE_CHECKING
 
 from UM.Logger import Logger
+from UM.Version import Version
 from cura.Backups.Backup import Backup
 
 if TYPE_CHECKING:
@@ -52,6 +53,7 @@ class BackupsManager:
 
         backup = Backup(self._application, zip_file = zip_file, meta_data = meta_data)
         restored = backup.restore()
+
         if restored:
             # At this point, Cura will need to restart for the changes to take effect.
             # We don't want to store the data at this point as that would override the just-restored backup.

cura/BuildVolume.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 import numpy
@@ -916,6 +916,8 @@ class BuildVolume(SceneNode):
             return {}
 
         for area in self._global_container_stack.getProperty("machine_disallowed_areas", "value"):
+            if len(area) == 0:
+                continue  # Numpy doesn't deal well with 0-length arrays, since it can't determine the dimensionality of them.
             polygon = Polygon(numpy.array(area, numpy.float32))
             polygon = polygon.getMinkowskiHull(Polygon.approximatedCircle(border_size))
             machine_disallowed_polygons.append(polygon)

cura/CuraActions.py

@@ -67,11 +67,15 @@ class CuraActions(QObject):
                 current_node = parent_node
                 parent_node = current_node.getParent()
 
-            #   This was formerly done with SetTransformOperation but because of
+            # Find out where the bottom of the object is
-            #   unpredictable matrix deconstruction it was possible that mirrors
+            bbox = current_node.getBoundingBox()
-            #   could manifest as rotations. Centering is therefore done by
+            if bbox:
-            #   moving the node to negative whatever its position is:
+                center_y = current_node.getWorldPosition().y - bbox.bottom
-            center_operation = TranslateOperation(current_node, -current_node._position)
+            else:
+                center_y = 0
+
+            # Move the object so that it's bottom is on to of the buildplate
+            center_operation = TranslateOperation(current_node, Vector(0, center_y, 0), set_position = True)
             operation.addOperation(center_operation)
         operation.push()
 

cura/CuraApplication.py

@@ -129,7 +129,7 @@ class CuraApplication(QtApplication):
     # SettingVersion represents the set of settings available in the machine/extruder definitions.
     # You need to make sure that this version number needs to be increased if there is any non-backwards-compatible
     # changes of the settings.
-    SettingVersion = 16
+    SettingVersion = 17
 
     Created = False
 
@@ -257,6 +257,9 @@ class CuraApplication(QtApplication):
         from cura.CuraPackageManager import CuraPackageManager
         self._package_manager_class = CuraPackageManager
 
+        from UM.CentralFileStorage import CentralFileStorage
+        CentralFileStorage.setIsEnterprise(ApplicationMetadata.IsEnterpriseVersion)
+
     @pyqtProperty(str, constant=True)
     def ultimakerCloudApiRootUrl(self) -> str:
         return UltimakerCloudConstants.CuraCloudAPIRoot
@@ -467,6 +470,7 @@ class CuraApplication(QtApplication):
                 ("user", InstanceContainer.Version * 1000000 + self.SettingVersion):                            (self.ResourceTypes.UserInstanceContainer, "application/x-uranium-instancecontainer"),
                 ("definition_changes", InstanceContainer.Version * 1000000 + self.SettingVersion):              (self.ResourceTypes.DefinitionChangesContainer, "application/x-uranium-instancecontainer"),
                 ("variant", InstanceContainer.Version * 1000000 + self.SettingVersion):                         (self.ResourceTypes.VariantInstanceContainer, "application/x-uranium-instancecontainer"),
+                ("setting_visibility", SettingVisibilityPresetsModel.Version * 1000000 + self.SettingVersion):  (self.ResourceTypes.SettingVisibilityPreset, "application/x-uranium-preferences"),
             }
         )
 
@@ -603,6 +607,15 @@ class CuraApplication(QtApplication):
     @pyqtSlot()
     def closeApplication(self) -> None:
         Logger.log("i", "Close application")
+
+        # Workaround: Before closing the window, remove the global stack.
+        # This is necessary because as the main window gets closed, hundreds of QML elements get updated which often
+        # request the global stack. However as the Qt-side of the Machine Manager is being dismantled, the conversion of
+        # the Global Stack to a QObject fails.
+        # If instead we first take down the global stack, PyQt will just convert `None` to `null` which succeeds, and
+        # the QML code then gets `null` as the global stack and can deal with that as it deems fit.
+        self.getMachineManager().setActiveMachine(None)
+
         main_window = self.getMainWindow()
         if main_window is not None:
             main_window.close()
@@ -695,6 +708,8 @@ class CuraApplication(QtApplication):
     @pyqtSlot(str)
     def discardOrKeepProfileChangesClosed(self, option: str) -> None:
         global_stack = self.getGlobalContainerStack()
+        if global_stack is None:
+            return
         if option == "discard":
             for extruder in global_stack.extruderList:
                 extruder.userChanges.clear()
@@ -1516,12 +1531,8 @@ class CuraApplication(QtApplication):
 
         # Compute the center of the objects
         object_centers = []
-        # Forget about the translation that the original objects have
-        zero_translation = Matrix(data=numpy.zeros(3))
         for mesh, node in zip(meshes, group_node.getChildren()):
-            transformation = node.getLocalTransformation()
+            transformed_mesh = mesh.getTransformed(Matrix())  # Forget about the transformations that the original object had.
-            transformation.setTranslation(zero_translation)
-            transformed_mesh = mesh.getTransformed(transformation)
             center = transformed_mesh.getCenterPosition()
             if center is not None:
                 object_centers.append(center)
@@ -1536,7 +1547,7 @@ class CuraApplication(QtApplication):
 
         # Move each node to the same position.
         for mesh, node in zip(meshes, group_node.getChildren()):
-            node.setTransformation(Matrix())
+            node.setTransformation(Matrix())  # Removes any changes in position and rotation.
             # Align the object around its zero position
             # and also apply the offset to center it inside the group.
             node.setPosition(-mesh.getZeroPosition() - offset)
@@ -1857,6 +1868,7 @@ class CuraApplication(QtApplication):
             else:
                 node = CuraSceneNode()
                 node.setMeshData(original_node.getMeshData())
+                node.source_mime_type = original_node.source_mime_type
 
                 # Setting meshdata does not apply scaling.
                 if original_node.getScale() != Vector(1.0, 1.0, 1.0):

cura/LayerPolygon.py

@@ -73,7 +73,7 @@ class LayerPolygon:
 
         # When type is used as index returns true if type == LayerPolygon.InfillType or type == LayerPolygon.SkinType or type == LayerPolygon.SupportInfillType
         # Should be generated in better way, not hardcoded.
-        self._is_infill_or_skin_type_map = numpy.array([0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0], dtype = numpy.bool)
+        self._is_infill_or_skin_type_map = numpy.array([0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0], dtype = bool)
 
         self._build_cache_line_mesh_mask = None  # type: Optional[numpy.ndarray]
         self._build_cache_needed_points = None  # type: Optional[numpy.ndarray]
@@ -81,18 +81,17 @@ class LayerPolygon:
     def buildCache(self) -> None:
         # For the line mesh we do not draw Infill or Jumps. Therefore those lines are filtered out.
         self._build_cache_line_mesh_mask = numpy.ones(self._jump_mask.shape, dtype = bool)
-        mesh_line_count = numpy.sum(self._build_cache_line_mesh_mask)
         self._index_begin = 0
-        self._index_end = mesh_line_count
+        self._index_end = cast(int, numpy.sum(self._build_cache_line_mesh_mask))
 
-        self._build_cache_needed_points = numpy.ones((len(self._types), 2), dtype = numpy.bool)
+        self._build_cache_needed_points = numpy.ones((len(self._types), 2), dtype = bool)
         # Only if the type of line segment changes do we need to add an extra vertex to change colors
         self._build_cache_needed_points[1:, 0][:, numpy.newaxis] = self._types[1:] != self._types[:-1]
         # Mark points as unneeded if they are of types we don't want in the line mesh according to the calculated mask
         numpy.logical_and(self._build_cache_needed_points, self._build_cache_line_mesh_mask, self._build_cache_needed_points )
 
         self._vertex_begin = 0
-        self._vertex_end = numpy.sum( self._build_cache_needed_points )
+        self._vertex_end = cast(int, numpy.sum(self._build_cache_needed_points))
 
     def build(self, vertex_offset: int, index_offset: int, vertices: numpy.ndarray, colors: numpy.ndarray, line_dimensions: numpy.ndarray, feedrates: numpy.ndarray, extruders: numpy.ndarray, line_types: numpy.ndarray, indices: numpy.ndarray) -> None:
         """Set all the arrays provided by the function caller, representing the LayerPolygon

cura/Machines/Models/ExtrudersModel.py

@@ -53,6 +53,9 @@ class ExtrudersModel(ListModel):
     EnabledRole = Qt.UserRole + 11
     """Is the extruder enabled?"""
 
+    MaterialTypeRole = Qt.UserRole + 12
+    """The type of the material (e.g. PLA, ABS, PETG, etc.)."""
+
     defaultColors = ["#ffc924", "#86ec21", "#22eeee", "#245bff", "#9124ff", "#ff24c8"]
     """List of colours to display if there is no material or the material has no known colour. """
 
@@ -75,6 +78,7 @@ class ExtrudersModel(ListModel):
         self.addRoleName(self.StackRole, "stack")
         self.addRoleName(self.MaterialBrandRole, "material_brand")
         self.addRoleName(self.ColorNameRole, "color_name")
+        self.addRoleName(self.MaterialTypeRole, "material_type")
         self._update_extruder_timer = QTimer()
         self._update_extruder_timer.setInterval(100)
         self._update_extruder_timer.setSingleShot(True)
@@ -193,7 +197,8 @@ class ExtrudersModel(ListModel):
                     "variant": extruder.variant.getName() if extruder.variant else "",  # e.g. print core
                     "stack": extruder,
                     "material_brand": material_brand,
-                    "color_name": color_name
+                    "color_name": color_name,
+                    "material_type": extruder.material.getMetaDataEntry("material") if extruder.material else "",
                 }
 
                 items.append(item)
@@ -210,7 +215,7 @@ class ExtrudersModel(ListModel):
                     "id": "",
                     "name": catalog.i18nc("@menuitem", "Not overridden"),
                     "enabled": True,
-                    "color": "#ffffff",
+                    "color": "transparent",
                     "index": -1,
                     "definition": "",
                     "material": "",
@@ -218,6 +223,7 @@ class ExtrudersModel(ListModel):
                     "stack": None,
                     "material_brand": "",
                     "color_name": "",
+                    "material_type": "",
                 }
                 items.append(item)
             if self._items != items:

cura/Machines/Models/MachineModelUtils.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2019 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 from typing import TYPE_CHECKING
@@ -34,4 +34,4 @@ def fetchLayerHeight(quality_group: "QualityGroup") -> float:
     if isinstance(layer_height, SettingFunction):
         layer_height = layer_height(global_stack)
 
-    return float(layer_height)
+    return round(float(layer_height), 3)

cura/Machines/Models/MaterialManagementModel.py

@@ -1,10 +1,11 @@
-# Copyright (c) 2019 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 import copy  # To duplicate materials.
-from PyQt5.QtCore import QObject, pyqtSignal, pyqtSlot  # To allow the preference page proxy to be used from the actual preferences page.
+from PyQt5.QtCore import pyqtProperty, pyqtSignal, pyqtSlot, QObject, QUrl
 from typing import Any, Dict, Optional, TYPE_CHECKING
 import uuid  # To generate new GUIDs for new materials.
+import zipfile  # To export all materials in a .zip archive.
 
 from UM.i18n import i18nCatalog
 from UM.Logger import Logger
@@ -20,11 +21,6 @@ if TYPE_CHECKING:
 catalog = i18nCatalog("cura")
 
 class MaterialManagementModel(QObject):
-    """Proxy class to the materials page in the preferences.
-
-    This class handles the actions in that page, such as creating new materials, renaming them, etc.
-    """
-
     favoritesChanged = pyqtSignal(str)
     """Triggered when a favorite is added or removed.
 
@@ -79,6 +75,7 @@ class MaterialManagementModel(QObject):
 
         :param material_node: The material to remove.
         """
+        Logger.info(f"Removing material {material_node.container_id}")
 
         container_registry = CuraContainerRegistry.getInstance()
         materials_this_base_file = container_registry.findContainersMetadata(base_file = material_node.base_file)
@@ -194,6 +191,7 @@ class MaterialManagementModel(QObject):
 
         :return: The root material ID of the duplicate material.
         """
+        Logger.info(f"Duplicating material {material_node.base_file} to {new_base_id}")
         return self.duplicateMaterialByBaseFile(material_node.base_file, new_base_id, new_metadata)
 
     @pyqtSlot(result = str)
@@ -262,3 +260,40 @@ class MaterialManagementModel(QObject):
             self.favoritesChanged.emit(material_base_file)
         except ValueError:  # Material was not in the favorites list.
             Logger.log("w", "Material {material_base_file} was already not a favorite material.".format(material_base_file = material_base_file))
+
+    @pyqtSlot(result = QUrl)
+    def getPreferredExportAllPath(self) -> QUrl:
+        """
+        Get the preferred path to export materials to.
+
+        If there is a removable drive, that should be the preferred path. Otherwise it should be the most recent local
+        file path.
+        :return: The preferred path to export all materials to.
+        """
+        cura_application = cura.CuraApplication.CuraApplication.getInstance()
+        device_manager = cura_application.getOutputDeviceManager()
+        devices = device_manager.getOutputDevices()
+        for device in devices:
+            if device.__class__.__name__ == "RemovableDriveOutputDevice":
+                return QUrl.fromLocalFile(device.getId())
+        else:  # No removable drives? Use local path.
+            return cura_application.getDefaultPath("dialog_material_path")
+
+    @pyqtSlot(QUrl)
+    def exportAll(self, file_path: QUrl) -> None:
+        """
+        Export all materials to a certain file path.
+        :param file_path: The path to export the materials to.
+        """
+        registry = CuraContainerRegistry.getInstance()
+
+        archive = zipfile.ZipFile(file_path.toLocalFile(), "w", compression = zipfile.ZIP_DEFLATED)
+        for metadata in registry.findInstanceContainersMetadata(type = "material"):
+            if metadata["base_file"] != metadata["id"]:  # Only process base files.
+                continue
+            if metadata["id"] == "empty_material":  # Don't export the empty material.
+                continue
+            material = registry.findContainers(id = metadata["id"])[0]
+            suffix = registry.getMimeTypeForContainer(type(material)).preferredSuffix
+            filename = metadata["id"] + "." + suffix
+            archive.writestr(filename, material.serialize())

cura/Machines/Models/QualitySettingsModel.py

@@ -99,7 +99,7 @@ class QualitySettingsModel(ListModel):
             if self._selected_position == self.GLOBAL_STACK_POSITION:
                 quality_node = quality_group.node_for_global
             else:
-                quality_node = quality_group.nodes_for_extruders.get(str(self._selected_position))
+                quality_node = quality_group.nodes_for_extruders.get(self._selected_position)
             settings_keys = quality_group.getAllKeys()
         quality_containers = []
         if quality_node is not None and quality_node.container is not None:
@@ -114,10 +114,13 @@ class QualitySettingsModel(ListModel):
             global_container = None if len(global_containers) == 0 else global_containers[0]
             extruders_containers = {pos: container_registry.findContainers(id = quality_changes_group.metadata_per_extruder[pos]["id"]) for pos in quality_changes_group.metadata_per_extruder}
             extruders_container = {pos: None if not containers else containers[0] for pos, containers in extruders_containers.items()}
+            quality_changes_metadata = None
             if self._selected_position == self.GLOBAL_STACK_POSITION and global_container:
                 quality_changes_metadata = global_container.getMetaData()
             else:
-                quality_changes_metadata = extruders_container.get(str(self._selected_position))
+                extruder = extruders_container.get(self._selected_position)
+                if extruder:
+                    quality_changes_metadata = extruder.getMetaData()
             if quality_changes_metadata is not None:  # It can be None if number of extruders are changed during runtime.
                 container = container_registry.findContainers(id = quality_changes_metadata["id"])
                 if container:

cura/Machines/Models/SettingVisibilityPresetsModel.py

@@ -19,6 +19,8 @@ class SettingVisibilityPresetsModel(QObject):
     onItemsChanged = pyqtSignal()
     activePresetChanged = pyqtSignal()
 
+    Version = 2
+
     def __init__(self, preferences: Preferences, parent = None) -> None:
         super().__init__(parent)
 

cura/OAuth2/AuthorizationHelpers.py

@@ -1,12 +1,12 @@
-# Copyright (c) 2020 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
+
 from datetime import datetime
 import json
 import random
 from hashlib import sha512
 from base64 import b64encode
-from typing import Optional, Any, Dict, Tuple
+from typing import Optional
-
 import requests
 
 from UM.i18n import i18nCatalog
@@ -115,7 +115,7 @@ class AuthorizationHelpers:
             token_request = requests.get(check_token_url, headers = {
                 "Authorization": "Bearer {}".format(access_token)
             })
-        except requests.exceptions.ConnectionError:
+        except (requests.exceptions.ConnectionError, requests.exceptions.Timeout):
             # Connection was suddenly dropped. Nothing we can do about that.
             Logger.logException("w", "Something failed while attempting to parse the JWT token")
             return None

cura/OAuth2/AuthorizationService.py

@@ -113,7 +113,9 @@ class AuthorizationService:
             # The token could not be refreshed using the refresh token. We should login again.
             return None
         # Ensure it gets stored as otherwise we only have it in memory. The stored refresh token has been deleted
-        # from the server already.
+        # from the server already. Do not store the auth_data if we could not get new auth_data (eg due to a
+        # network error), since this would cause an infinite loop trying to get new auth-data
+        if self._auth_data.success:
             self._storeAuthData(self._auth_data)
         return self._auth_helpers.parseJWT(self._auth_data.access_token)
 
@@ -255,10 +257,9 @@ class AuthorizationService:
         self._auth_data = auth_data
         if auth_data:
             self._user_profile = self.getUserProfile()
-            self._preferences.setValue(self._settings.AUTH_DATA_PREFERENCE_KEY, json.dumps(vars(auth_data)))
+            self._preferences.setValue(self._settings.AUTH_DATA_PREFERENCE_KEY, json.dumps(auth_data.dump()))
         else:
             self._user_profile = None
             self._preferences.resetPreference(self._settings.AUTH_DATA_PREFERENCE_KEY)
 
         self.accessTokenChanged.emit()
-

cura/OAuth2/KeyringAttribute.py

@@ -0,0 +1,83 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+from typing import Type, TYPE_CHECKING, Optional, List
+
+import keyring
+from keyring.backend import KeyringBackend
+from keyring.errors import NoKeyringError, PasswordSetError, KeyringLocked
+
+from UM.Logger import Logger
+
+if TYPE_CHECKING:
+    from cura.OAuth2.Models import BaseModel
+
+# Need to do some extra workarounds on windows:
+import sys
+from UM.Platform import Platform
+if Platform.isWindows() and hasattr(sys, "frozen"):
+    import win32timezone
+    from keyring.backends.Windows import WinVaultKeyring
+    keyring.set_keyring(WinVaultKeyring())
+if Platform.isOSX() and hasattr(sys, "frozen"):
+    from keyring.backends.macOS import Keyring
+    keyring.set_keyring(Keyring())
+
+# Even if errors happen, we don't want this stored locally:
+DONT_EVER_STORE_LOCALLY: List[str] = ["refresh_token"]
+
+
+class KeyringAttribute:
+    """
+    Descriptor for attributes that need to be stored in the keyring. With Fallback behaviour to the preference cfg file
+    """
+    def __get__(self, instance: "BaseModel", owner: type) -> Optional[str]:
+        if self._store_secure:  # type: ignore
+            try:
+                value = keyring.get_password("cura", self._keyring_name)
+                return value if value != "" else None
+            except NoKeyringError:
+                self._store_secure = False
+                Logger.logException("w", "No keyring backend present")
+                return getattr(instance, self._name)
+            except KeyringLocked:
+                self._store_secure = False
+                Logger.log("i", "Access to the keyring was denied.")
+                return getattr(instance, self._name)
+        else:
+            return getattr(instance, self._name)
+
+    def __set__(self, instance: "BaseModel", value: Optional[str]):
+        if self._store_secure:
+            setattr(instance, self._name, None)
+            if value is not None:
+                try:
+                    keyring.set_password("cura", self._keyring_name, value)
+                except (PasswordSetError, KeyringLocked):
+                    self._store_secure = False
+                    if self._name not in DONT_EVER_STORE_LOCALLY:
+                        setattr(instance, self._name, value)
+                    Logger.logException("w", "Keyring access denied")
+                except NoKeyringError:
+                    self._store_secure = False
+                    if self._name not in DONT_EVER_STORE_LOCALLY:
+                        setattr(instance, self._name, value)
+                    Logger.logException("w", "No keyring backend present")
+                except BaseException as e:
+                    # A BaseException can occur in Windows when the keyring attempts to write a token longer than 1024
+                    # characters in the Windows Credentials Manager.
+                    self._store_secure = False
+                    if self._name not in DONT_EVER_STORE_LOCALLY:
+                        setattr(instance, self._name, value)
+                    Logger.log("w", "Keyring failed: {}".format(e))
+        else:
+            setattr(instance, self._name, value)
+
+    def __set_name__(self, owner: type, name: str):
+        self._name = "_{}".format(name)
+        self._keyring_name = name
+        self._store_secure = False
+        try:
+            self._store_secure = KeyringBackend.viable
+        except NoKeyringError:
+            Logger.logException("w", "Could not use keyring")
+        setattr(owner, self._name, None)

cura/OAuth2/LocalAuthorizationServer.py

@@ -54,6 +54,7 @@ class LocalAuthorizationServer:
         if self._web_server:
             # If the server is already running (because of a previously aborted auth flow), we don't have to start it.
             # We still inject the new verification code though.
+            Logger.log("d", "Auth web server was already running. Updating the verification code")
             self._web_server.setVerificationCode(verification_code)
             return
 
@@ -85,6 +86,7 @@ class LocalAuthorizationServer:
             except OSError:
                 # OS error can happen if the socket was already closed. We really don't care about that case.
                 pass
+        Logger.log("d", "Local oauth2 web server was shut down")
         self._web_server = None
         self._web_server_thread = None
 
@@ -96,12 +98,13 @@ class LocalAuthorizationServer:
 
         :return: None
         """
+        Logger.log("d", "Local web server for authorization has started")
         if self._web_server:
             if sys.platform == "win32":
                 try:
                     self._web_server.serve_forever()
-                except OSError as e:
+                except OSError:
-                    Logger.warning(str(e))
+                    Logger.logException("w", "An exception happened while serving the auth server")
             else:
                 # Leave the default behavior in non-windows platforms
                 self._web_server.serve_forever()

cura/OAuth2/Models.py

@@ -1,6 +1,8 @@
-# Copyright (c) 2020 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
-from typing import Optional, Dict, Any, List
+from typing import Optional, Dict, Any, List, Union
+from copy import deepcopy
+from cura.OAuth2.KeyringAttribute import KeyringAttribute
 
 
 class BaseModel:
@@ -37,12 +39,29 @@ class AuthenticationResponse(BaseModel):
     # Data comes from the token response with success flag and error message added.
     success = True  # type: bool
     token_type = None  # type: Optional[str]
-    access_token = None  # type: Optional[str]
-    refresh_token = None  # type: Optional[str]
     expires_in = None  # type: Optional[str]
     scope = None  # type: Optional[str]
     err_message = None  # type: Optional[str]
     received_at = None  # type: Optional[str]
+    access_token = KeyringAttribute()
+    refresh_token = KeyringAttribute()
+    
+    def __init__(self, **kwargs: Any) -> None:
+        self.access_token = kwargs.pop("access_token", None)
+        self.refresh_token = kwargs.pop("refresh_token", None)
+        super(AuthenticationResponse, self).__init__(**kwargs)
+
+    def dump(self) -> Dict[str, Union[bool, Optional[str]]]:
+        """
+        Dumps the dictionary of Authentication attributes. KeyringAttributes are transformed to public attributes
+        If the keyring was used, these will have a None value, otherwise they will have the secret value
+
+        :return: Dictionary of Authentication attributes
+        """
+        dumped = deepcopy(vars(self))
+        dumped["access_token"] = dumped.pop("_access_token")
+        dumped["refresh_token"] = dumped.pop("_refresh_token")
+        return dumped
 
 
 class ResponseStatus(BaseModel):

cura/Scene/CuraSceneNode.py

@@ -119,21 +119,23 @@ class CuraSceneNode(SceneNode):
         self._aabb = None
         if self._mesh_data:
             self._aabb = self._mesh_data.getExtents(self.getWorldTransformation(copy = False))
-        else:  # If there is no mesh_data, use a bounding box that encompasses the local (0,0,0)
-            position = self.getWorldPosition()
-            self._aabb = AxisAlignedBox(minimum = position, maximum = position)
 
         for child in self.getAllChildren():
             if child.callDecoration("isNonPrintingMesh"):
                 # Non-printing-meshes inside a group should not affect push apart or drop to build plate
                 continue
-            if not child.getMeshData():
+            child_bb = child.getBoundingBox()
-                # Nodes without mesh data should not affect bounding boxes of their parents.
+            if child_bb is None or child_bb.minimum == child_bb.maximum:
+                # Child had a degenerate bounding box, such as an empty group. Don't count it along.
                 continue
             if self._aabb is None:
-                self._aabb = child.getBoundingBox()
+                self._aabb = child_bb
             else:
-                self._aabb = self._aabb + child.getBoundingBox()
+                self._aabb = self._aabb + child_bb
+
+        if self._aabb is None:  # No children that should be included? Just use your own position then, but it's an invalid AABB.
+            position = self.getWorldPosition()
+            self._aabb = AxisAlignedBox(minimum = position, maximum = position)
 
     def __deepcopy__(self, memo: Dict[int, object]) -> "CuraSceneNode":
         """Taken from SceneNode, but replaced SceneNode with CuraSceneNode"""
@@ -142,6 +144,7 @@ class CuraSceneNode(SceneNode):
         copy.setTransformation(self.getLocalTransformation(copy= False))
         copy.setMeshData(self._mesh_data)
         copy.setVisible(cast(bool, deepcopy(self._visible, memo)))
+        copy.source_mime_type = cast(str, deepcopy(self.source_mime_type, memo))
         copy._selectable = cast(bool, deepcopy(self._selectable, memo))
         copy._name = cast(str, deepcopy(self._name, memo))
         for decorator in self._decorators:

cura/Settings/ContainerManager.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 import os
@@ -241,6 +241,7 @@ class ContainerManager(QObject):
             file_url = file_url_or_string.toLocalFile()
         else:
             file_url = file_url_or_string
+        Logger.info(f"Importing material from {file_url}")
 
         if not file_url or not os.path.exists(file_url):
             return {"status": "error", "message": "Invalid path"}

cura/Settings/CuraContainerRegistry.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2019 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 import os
@@ -381,8 +381,9 @@ class CuraContainerRegistry(ContainerRegistry):
             if profile_count > 1:
                 continue
             # Only one profile found, this should not ever be the case, so that profile needs to be removed!
-            Logger.log("d", "Found an invalid quality_changes profile with the name %s. Going to remove that now", profile_name)
             invalid_quality_changes = ContainerRegistry.getInstance().findContainersMetadata(name=profile_name)
+            if invalid_quality_changes:
+                Logger.log("d", "Found an invalid quality_changes profile with the name %s. Going to remove that now", profile_name)
                 self.removeContainer(invalid_quality_changes[0]["id"])
 
     @override(ContainerRegistry)

cura/Settings/GlobalStack.py

@@ -86,6 +86,14 @@ class GlobalStack(CuraContainerStack):
     def supportsNetworkConnection(self):
         return self.getMetaDataEntry("supports_network_connection", False)
 
+    @pyqtProperty(bool, constant = True)
+    def supportsMaterialExport(self):
+        """
+        Whether the printer supports Cura's export format of material profiles.
+        :return: ``True`` if it supports it, or ``False`` if not.
+        """
+        return self.getMetaDataEntry("supports_material_export", False)
+
     @classmethod
     def getLoadingPriority(cls) -> int:
         return 2

cura/Snapshot.py

@@ -25,8 +25,8 @@ class Snapshot:
         pixels = numpy.frombuffer(pixel_array, dtype=numpy.uint8).reshape([height, width, 4])
         # Find indices of non zero pixels
         nonzero_pixels = numpy.nonzero(pixels)
-        min_y, min_x, min_a_ = numpy.amin(nonzero_pixels, axis=1)
+        min_y, min_x, min_a_ = numpy.amin(nonzero_pixels, axis=1)  # type: ignore
-        max_y, max_x, max_a_ = numpy.amax(nonzero_pixels, axis=1)
+        max_y, max_x, max_a_ = numpy.amax(nonzero_pixels, axis=1)  # type: ignore
 
         return min_x, max_x, min_y, max_y
 

cura/UI/ObjectsModel.py

@@ -132,9 +132,26 @@ class ObjectsModel(ListModel):
 
             is_group = bool(node.callDecoration("isGroup"))
 
+            name_handled_as_group = False
             force_rename = False
-            if not is_group:
+            if is_group:
-                # Handle names for individual nodes
+                # Handle names for grouped nodes
+                original_name = self._group_name_prefix
+
+                current_name = node.getName()
+                if current_name.startswith(self._group_name_prefix):
+                    # This group has a standard group name, but we may need to renumber it
+                    name_index = int(current_name.split("#")[-1])
+                    name_handled_as_group = True
+                elif not current_name:
+                    # Force rename this group because this node has not been named as a group yet, probably because
+                    # it's a newly created group.
+                    name_index = 0
+                    force_rename = True
+                    name_handled_as_group = True
+
+            if not is_group or not name_handled_as_group:
+                # Handle names for individual nodes or groups that already have a non-group name
                 name = node.getName()
 
                 name_match = self._naming_regex.fullmatch(name)
@@ -144,18 +161,6 @@ class ObjectsModel(ListModel):
                 else:
                     original_name = name_match.groups()[0]
                     name_index = int(name_match.groups()[1])
-            else:
-                # Handle names for grouped nodes
-                original_name = self._group_name_prefix
-
-                current_name = node.getName()
-                if current_name.startswith(self._group_name_prefix):
-                    name_index = int(current_name.split("#")[-1])
-                else:
-                    # Force rename this group because this node has not been named as a group yet, probably because
-                    # it's a newly created group.
-                    name_index = 0
-                    force_rename = True
 
             if original_name not in name_to_node_info_dict:
                 # Keep track of 2 things:

cura/UI/TextManager.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2019 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 import collections
@@ -6,9 +6,11 @@ from typing import Optional, Dict, List, cast
 
 from PyQt5.QtCore import QObject, pyqtSlot
 
+from UM.i18n import i18nCatalog
 from UM.Resources import Resources
 from UM.Version import Version
 
+catalog = i18nCatalog("cura")
 
 #
 # This manager provides means to load texts to QML.
@@ -30,10 +32,11 @@ class TextManager(QObject):
         # Load change log texts and organize them with a dict
         try:
             file_path = Resources.getPath(Resources.Texts, "change_log.txt")
-        except FileNotFoundError:
+        except FileNotFoundError as e:
             # I have no idea how / when this happens, but we're getting crash reports about it.
-            return ""
+            return catalog.i18nc("@text:window", "The release notes could not be opened.") + "<br>" + str(e)
         change_logs_dict = {}  # type: Dict[Version, Dict[str, List[str]]]
+        try:
             with open(file_path, "r", encoding = "utf-8") as f:
                 open_version = None  # type: Optional[Version]
                 open_header = ""  # Initialise to an empty header in case there is no "*" in the first line of the changelog
@@ -54,6 +57,8 @@ class TextManager(QObject):
                         if open_header not in change_logs_dict[cast(Version, open_version)]:
                             change_logs_dict[cast(Version, open_version)][open_header] = []
                         change_logs_dict[cast(Version, open_version)][open_header].append(line)
+        except EnvironmentError as e:
+            return catalog.i18nc("@text:window", "The release notes could not be opened.") + "<br>" + str(e)
 
         # Format changelog text
         content = ""

cura/UI/WelcomePagesModel.py

@@ -239,9 +239,6 @@ class WelcomePagesModel(ListModel):
                           {"id": "user_agreement",
                            "page_url": self._getBuiltinWelcomePagePath("UserAgreementContent.qml"),
                            },
-                          {"id": "whats_new",
-                           "page_url": self._getBuiltinWelcomePagePath("WhatsNewContent.qml"),
-                           },
                           {"id": "data_collections",
                            "page_url": self._getBuiltinWelcomePagePath("DataCollectionsContent.qml"),
                            },
@@ -259,13 +256,21 @@ class WelcomePagesModel(ListModel):
                            },
                           {"id": "add_cloud_printers",
                            "page_url": self._getBuiltinWelcomePagePath("AddCloudPrintersView.qml"),
-                           "is_final_page": True,  # If we end up in this page, the next button will close the dialog
+                           "next_page_button_text": self._catalog.i18nc("@action:button", "Next"),
-                           "next_page_button_text": self._catalog.i18nc("@action:button", "Finish"),
+                           "next_page_id": "whats_new",
                            },
                           {"id": "machine_actions",
                            "page_url": self._getBuiltinWelcomePagePath("FirstStartMachineActionsContent.qml"),
                            "should_show_function": self.shouldShowMachineActions,
                            },
+                          {"id": "whats_new",
+                           "page_url": self._getBuiltinWelcomePagePath("WhatsNewContent.qml"),
+                           "next_page_button_text": self._catalog.i18nc("@action:button", "Skip"),
+                           },
+                          {"id": "changelog",
+                           "page_url": self._getBuiltinWelcomePagePath("ChangelogContent.qml"),
+                           "next_page_button_text": self._catalog.i18nc("@action:button", "Finish"),
+                           },
                           ]
 
         pages_to_show = all_pages_list

cura/UI/WhatsNewPagesModel.py

@@ -1,8 +1,12 @@
-# Copyright (c) 2019 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
-
 from .WelcomePagesModel import WelcomePagesModel
 
+import os
+from typing import Optional, Dict, List, Tuple
+from PyQt5.QtCore import pyqtProperty, pyqtSlot
+from UM.Logger import Logger
+from UM.Resources import Resources
 
 #
 # This Qt ListModel is more or less the same the WelcomePagesModel, except that this model is only for showing the
@@ -10,13 +14,84 @@ from .WelcomePagesModel import WelcomePagesModel
 #
 class WhatsNewPagesModel(WelcomePagesModel):
 
+    image_formats = [".png", ".jpg", ".jpeg", ".gif", ".svg"]
+    text_formats = [".txt", ".htm", ".html"]
+    image_key = "image"
+    text_key = "text"
+
+    @staticmethod
+    def _collectOrdinalFiles(resource_type: int, include: List[str]) -> Tuple[Dict[int, str], int]:
+        result = {}  #type: Dict[int, str]
+        highest = -1
+        try:
+            folder_path = Resources.getPath(resource_type, "whats_new")
+            for _, _, files in os.walk(folder_path):
+                for filename in files:
+                    basename = os.path.basename(filename)
+                    base, ext = os.path.splitext(basename)
+                    if ext.lower() not in include or not base.isdigit():
+                        continue
+                    page_no = int(base)
+                    highest = max(highest, page_no)
+                    result[page_no] = os.path.join(folder_path, filename)
+        except FileNotFoundError:
+            Logger.logException("w", "Could not find 'whats_new' folder for resource-type {0}".format(resource_type))
+        return result, highest
+
+    @staticmethod
+    def _loadText(filename: str) -> str:
+        result = ""
+        try:
+            with open(filename, "r", encoding="utf-8") as file:
+                result = file.read()
+        except OSError:
+            Logger.logException("w", "Could not open {0}".format(filename))
+        return result
+
     def initialize(self) -> None:
         self._pages = []
         self._pages.append({"id": "whats_new",
                             "page_url": self._getBuiltinWelcomePagePath("WhatsNewContent.qml"),
+                            "next_page_button_text": self._catalog.i18nc("@action:button", "Skip"),
+                            "next_page_id": "changelog"
+                            })
+        self._pages.append({"id": "changelog",
+                            "page_url": self._getBuiltinWelcomePagePath("ChangelogContent.qml"),
                             "next_page_button_text": self._catalog.i18nc("@action:button", "Close"),
                             })
         self.setItems(self._pages)
 
+        images, max_image = WhatsNewPagesModel._collectOrdinalFiles(Resources.Images, WhatsNewPagesModel.image_formats)
+        texts, max_text = WhatsNewPagesModel._collectOrdinalFiles(Resources.Texts, WhatsNewPagesModel.text_formats)
+        highest = max(max_image, max_text)
+
+        self._subpages = []  #type: List[Dict[str, Optional[str]]]
+        for n in range(0, highest + 1):
+            self._subpages.append({
+                WhatsNewPagesModel.image_key: None if n not in images else images[n],
+                WhatsNewPagesModel.text_key: None if n not in texts else self._loadText(texts[n])
+            })
+        if len(self._subpages) == 0:
+            self._subpages.append({WhatsNewPagesModel.text_key: "~ There Is Nothing New Under The Sun ~"})
+
+    def _getSubpageItem(self, page: int, item: str) -> Optional[str]:
+        if 0 <= page < self.subpageCount and item in self._subpages[page]:
+            return self._subpages[page][item]
+        else:
+            return None
+
+    @pyqtProperty(int, constant = True)
+    def subpageCount(self) -> int:
+        return len(self._subpages)
+
+    @pyqtSlot(int, result = str)
+    def getSubpageImageSource(self, page: int) -> str:
+        result = self._getSubpageItem(page, WhatsNewPagesModel.image_key)
+        return "file:///" + (result if result else Resources.getPath(Resources.Images, "cura-icon.png"))
+
+    @pyqtSlot(int, result = str)
+    def getSubpageText(self, page: int) -> str:
+        result = self._getSubpageItem(page, WhatsNewPagesModel.text_key)
+        return result if result else "* * *"
 
 __all__ = ["WhatsNewPagesModel"]

cura_app.py

@@ -16,14 +16,6 @@ import argparse
 import faulthandler
 import os
 
-# Workaround for a race condition on certain systems where there
-# is a race condition between Arcus and PyQt. Importing Arcus
-# first seems to prevent Sip from going into a state where it
-# tries to create PyQt objects on a non-main thread.
-import Arcus  # @UnusedImport
-import Savitar  # @UnusedImport
-import pynest2d # @UnusedImport
-
 from PyQt5.QtNetwork import QSslConfiguration, QSslSocket
 
 from UM.Platform import Platform

docker/build.sh

@@ -7,7 +7,7 @@ SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 PROJECT_DIR="$( cd "${SCRIPT_DIR}/.." && pwd )"
 
 # Make sure that environment variables are set properly
-source /opt/rh/devtoolset-7/enable
+source /opt/rh/devtoolset-8/enable
 export PATH="${CURA_BUILD_ENV_PATH}/bin:${PATH}"
 export PKG_CONFIG_PATH="${CURA_BUILD_ENV_PATH}/lib/pkgconfig:${PKG_CONFIG_PATH}"
 

plugins/3MFReader/ThreeMFWorkspaceReader.py

@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Ultimaker B.V.
+# Copyright (c) 2021 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 
 from configparser import ConfigParser
@@ -412,7 +412,12 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
         quality_container_id = parser["containers"][str(_ContainerIndexes.Quality)]
         quality_type = "empty_quality"
         if quality_container_id not in ("empty", "empty_quality"):
+            if quality_container_id in instance_container_info_dict:
                 quality_type = instance_container_info_dict[quality_container_id].parser["metadata"]["quality_type"]
+            else:  # If a version upgrade changed the quality profile in the stack, we'll need to look for it in the built-in profiles instead of the workspace.
+                quality_matches = ContainerRegistry.getInstance().findContainersMetadata(id = quality_container_id)
+                if quality_matches:  # If there's no profile with this ID, leave it empty_quality.
+                    quality_type = quality_matches[0]["quality_type"]
 
         # Get machine info
         serialized = archive.open(global_stack_file).read().decode("utf-8")
@@ -1157,7 +1162,7 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
                 return
             machine_manager.setQualityChangesGroup(quality_changes_group, no_dialog = True)
         else:
-            self._quality_type_to_apply = self._quality_type_to_apply.lower()
+            self._quality_type_to_apply = self._quality_type_to_apply.lower() if self._quality_type_to_apply else None
             quality_group_dict = container_tree.getCurrentQualityGroups()
             if self._quality_type_to_apply in quality_group_dict:
                 quality_group = quality_group_dict[self._quality_type_to_apply]

plugins/3MFReader/WorkspaceDialog.qml

@@ -419,7 +419,7 @@ UM.Dialog
                     width: warningLabel.height
                     height: width
 
-                    source: UM.Theme.getIcon("notice")
+                    source: UM.Theme.getIcon("Information")
                     color: palette.text
 
                 }

plugins/3MFReader/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.1",
     "description": "Provides support for reading 3MF files.",
-    "api": "7.4.0",
+    "api": 7,
     "i18n-catalog": "cura"
 }

plugins/3MFWriter/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.1",
     "description": "Provides support for writing 3MF files.",
-    "api": "7.4.0",
+    "api": 7,
     "i18n-catalog": "cura"
 }

plugins/AMFReader/AMFReader.py

@@ -157,22 +157,22 @@ class AMFReader(MeshReader):
         tri_faces = tri_node.faces
         tri_vertices = tri_node.vertices
 
-        indices = []
+        indices_list = []
-        vertices = []
+        vertices_list = []
 
         index_count = 0
         face_count = 0
         for tri_face in tri_faces:
             face = []
             for tri_index in tri_face:
-                vertices.append(tri_vertices[tri_index])
+                vertices_list.append(tri_vertices[tri_index])
                 face.append(index_count)
                 index_count += 1
-            indices.append(face)
+            indices_list.append(face)
             face_count += 1
 
-        vertices = numpy.asarray(vertices, dtype = numpy.float32)
+        vertices = numpy.asarray(vertices_list, dtype = numpy.float32)
-        indices = numpy.asarray(indices, dtype = numpy.int32)
+        indices = numpy.asarray(indices_list, dtype = numpy.int32)
         normals = calculateNormalsFromIndexedVertices(vertices, indices, face_count)
 
         mesh_data = MeshData(vertices = vertices, indices = indices, normals = normals,file_name = file_name)

plugins/AMFReader/plugin.json

@@ -3,5 +3,5 @@
     "author": "fieldOfView",
     "version": "1.0.0",
     "description": "Provides support for reading AMF files.",
-    "api": "7.4.0"
+    "api": 7
 }

plugins/CuraDrive/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "description": "Backup and restore your configuration.",
     "version": "1.2.0",
-    "api": "7.4.0",
+    "api": 7,
     "i18n-catalog": "cura"
 }

plugins/CuraDrive/src/CreateBackupJob.py

@@ -5,7 +5,6 @@ import threading
 from datetime import datetime
 from typing import Any, Dict, Optional
 
-import sentry_sdk
 from PyQt5.QtNetwork import QNetworkReply
 
 from UM.Job import Job
@@ -99,13 +98,7 @@ class CreateBackupJob(Job):
             if HttpRequestManager.safeHttpStatus(reply) == 400:
                 errors = json.loads(replyText)["errors"]
                 if "moreThanMaximum" in [error["code"] for error in errors if error["meta"] and error["meta"]["field_name"] == "backup_size"]:
-                    if self._backup_zip is None:  # will never happen; keep mypy happy
-                        zip_error = "backup is None."
-                    else:
-                        zip_error = "{} exceeds max size.".format(str(len(self._backup_zip)))
-                    sentry_sdk.capture_message("backup failed: {}".format(zip_error), level ="warning")
                     self.backup_upload_error_message = catalog.i18nc("@error:file_size", "The backup exceeds the maximum file size.")
-                    from sentry_sdk import capture_message
 
             self._job_done.set()
             return

plugins/CuraDrive/src/DrivePluginExtension.py

@@ -34,6 +34,9 @@ class DrivePluginExtension(QObject, Extension):
     # Signal emitted when preferences changed (like auto-backup).
     preferencesChanged = pyqtSignal()
 
+    # Signal emitted when the id of the backup-to-be-restored is changed
+    backupIdBeingRestoredChanged = pyqtSignal(arguments = ["backup_id_being_restored"])
+
     DATE_FORMAT = "%d/%m/%Y %H:%M:%S"
 
     def __init__(self) -> None:
@@ -45,6 +48,7 @@ class DrivePluginExtension(QObject, Extension):
         self._backups = []  # type: List[Dict[str, Any]]
         self._is_restoring_backup = False
         self._is_creating_backup = False
+        self._backup_id_being_restored = ""
 
         # Initialize services.
         preferences = CuraApplication.getInstance().getPreferences()
@@ -52,6 +56,7 @@ class DrivePluginExtension(QObject, Extension):
 
         # Attach signals.
         CuraApplication.getInstance().getCuraAPI().account.loginStateChanged.connect(self._onLoginStateChanged)
+        CuraApplication.getInstance().applicationShuttingDown.connect(self._onApplicationShuttingDown)
         self._drive_api_service.restoringStateChanged.connect(self._onRestoringStateChanged)
         self._drive_api_service.creatingStateChanged.connect(self._onCreatingStateChanged)
 
@@ -75,6 +80,10 @@ class DrivePluginExtension(QObject, Extension):
         if self._drive_window:
             self._drive_window.show()
 
+    def _onApplicationShuttingDown(self):
+        if self._drive_window:
+            self._drive_window.hide()
+
     def _autoBackup(self) -> None:
         preferences = CuraApplication.getInstance().getPreferences()
         if preferences.getValue(Settings.AUTO_BACKUP_ENABLED_PREFERENCE_KEY) and self._isLastBackupTooLongAgo():
@@ -100,10 +109,11 @@ class DrivePluginExtension(QObject, Extension):
         if logged_in:
             self.refreshBackups()
 
-    def _onRestoringStateChanged(self, is_restoring: bool = False, error_message: str = None) -> None:
+    def _onRestoringStateChanged(self, is_restoring: bool = False, error_message: Optional[str] = None) -> None:
         self._is_restoring_backup = is_restoring
         self.restoringStateChanged.emit()
         if error_message:
+            self.backupIdBeingRestored = ""
             Message(error_message, title = catalog.i18nc("@info:title", "Backup")).show()
 
     def _onCreatingStateChanged(self, is_creating: bool = False, error_message: str = None) -> None:
@@ -152,6 +162,7 @@ class DrivePluginExtension(QObject, Extension):
         for backup in self._backups:
             if backup.get("backup_id") == backup_id:
                 self._drive_api_service.restoreBackup(backup)
+                self.setBackupIdBeingRestored(backup_id)
                 return
         Logger.log("w", "Unable to find backup with the ID %s", backup_id)
 
@@ -166,3 +177,12 @@ class DrivePluginExtension(QObject, Extension):
     def _backupDeletedCallback(self, success: bool):
         if success:
             self.refreshBackups()
+
+    def setBackupIdBeingRestored(self, backup_id_being_restored: str) -> None:
+        if backup_id_being_restored != self._backup_id_being_restored:
+            self._backup_id_being_restored = backup_id_being_restored
+            self.backupIdBeingRestoredChanged.emit()
+
+    @pyqtProperty(str, fset = setBackupIdBeingRestored, notify = backupIdBeingRestoredChanged)
+    def backupIdBeingRestored(self) -> str:
+        return self._backup_id_being_restored

plugins/CuraDrive/src/RestoreBackupJob.py

@@ -1,3 +1,6 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
 import base64
 import hashlib
 import threading
@@ -56,6 +59,7 @@ class RestoreBackupJob(Job):
             return
 
         # We store the file in a temporary path fist to ensure integrity.
+        try:
             temporary_backup_file = NamedTemporaryFile(delete = False)
             with open(temporary_backup_file.name, "wb") as write_backup:
                 app = CuraApplication.getInstance()
@@ -64,6 +68,11 @@ class RestoreBackupJob(Job):
                     write_backup.write(bytes_read)
                     bytes_read = reply.read(self.DISK_WRITE_BUFFER_SIZE)
                     app.processEvents()
+        except EnvironmentError as e:
+            Logger.log("e", f"Unable to save backed up files due to computer limitations: {str(e)}")
+            self.restore_backup_error_message = self.DEFAULT_ERROR_MESSAGE
+            self._job_done.set()
+            return
 
         if not self._verifyMd5Hash(temporary_backup_file.name, self._backup.get("md5_hash", "")):
             # Don't restore the backup if the MD5 hashes do not match.

plugins/CuraDrive/src/qml/components/BackupListFooter.qml

@@ -20,7 +20,7 @@ RowLayout
     {
         id: infoButton
         text: catalog.i18nc("@button", "Want more?")
-        iconSource: UM.Theme.getIcon("info")
+        iconSource: UM.Theme.getIcon("Information")
         onClicked: Qt.openUrlExternally("https://goo.gl/forms/QACEP8pP3RV60QYG2")
         visible: backupListFooter.showInfoButton
     }
@@ -29,7 +29,7 @@ RowLayout
     {
         id: createBackupButton
         text: catalog.i18nc("@button", "Backup Now")
-        iconSource: UM.Theme.getIcon("plus")
+        iconSource: UM.Theme.getIcon("Plus")
         enabled: !CuraDrive.isCreatingBackup && !CuraDrive.isRestoringBackup
         onClicked: CuraDrive.createBackup()
         busy: CuraDrive.isCreatingBackup

plugins/CuraDrive/src/qml/components/BackupListItem.qml

@@ -38,7 +38,7 @@ Item
             height: UM.Theme.getSize("section_icon").height
             color: UM.Theme.getColor("small_button_text")
             hoverColor: UM.Theme.getColor("small_button_text_hover")
-            iconSource: UM.Theme.getIcon("info")
+            iconSource: UM.Theme.getIcon("Information")
             onClicked: backupListItem.showDetails = !backupListItem.showDetails
         }
 
@@ -71,6 +71,7 @@ Item
             text: catalog.i18nc("@button", "Restore")
             enabled: !CuraDrive.isCreatingBackup && !CuraDrive.isRestoringBackup
             onClicked: confirmRestoreDialog.visible = true
+            busy: CuraDrive.backupIdBeingRestored == modelData.backup_id && CuraDrive.isRestoringBackup
         }
 
         UM.SimpleButton
@@ -79,7 +80,7 @@ Item
             height: UM.Theme.getSize("message_close").height
             color: UM.Theme.getColor("small_button_text")
             hoverColor: UM.Theme.getColor("small_button_text_hover")
-            iconSource: UM.Theme.getIcon("cross1")
+            iconSource: UM.Theme.getIcon("Cancel")
             onClicked: confirmDeleteDialog.visible = true
         }
     }

plugins/CuraDrive/src/qml/components/BackupListItemDetails.qml

@@ -1,4 +1,4 @@
-// Copyright (c) 2018 Ultimaker B.V.
+// Copyright (c) 2021 Ultimaker B.V.
 // Cura is released under the terms of the LGPLv3 or higher.
 
 import QtQuick 2.7
@@ -17,7 +17,7 @@ ColumnLayout
     // Cura version
     BackupListItemDetailsRow
     {
-        iconSource: UM.Theme.getIcon("application")
+        iconSource: UM.Theme.getIcon("UltimakerCura")
         label: catalog.i18nc("@backuplist:label", "Cura Version")
         value: backupDetailsData.metadata.cura_release
     }
@@ -25,7 +25,7 @@ ColumnLayout
     // Machine count.
     BackupListItemDetailsRow
     {
-        iconSource: UM.Theme.getIcon("printer_single")
+        iconSource: UM.Theme.getIcon("Printer")
         label: catalog.i18nc("@backuplist:label", "Machines")
         value: backupDetailsData.metadata.machine_count
     }
@@ -33,7 +33,7 @@ ColumnLayout
     // Material count
     BackupListItemDetailsRow
     {
-        iconSource: UM.Theme.getIcon("category_material")
+        iconSource: UM.Theme.getIcon("Spool")
         label: catalog.i18nc("@backuplist:label", "Materials")
         value: backupDetailsData.metadata.material_count
     }
@@ -41,7 +41,7 @@ ColumnLayout
     // Profile count.
     BackupListItemDetailsRow
     {
-        iconSource: UM.Theme.getIcon("settings")
+        iconSource: UM.Theme.getIcon("Sliders")
         label: catalog.i18nc("@backuplist:label", "Profiles")
         value: backupDetailsData.metadata.profile_count
     }
@@ -49,7 +49,7 @@ ColumnLayout
     // Plugin count.
     BackupListItemDetailsRow
     {
-        iconSource: UM.Theme.getIcon("plugin")
+        iconSource: UM.Theme.getIcon("Plugin")
         label: catalog.i18nc("@backuplist:label", "Plugins")
         value: backupDetailsData.metadata.plugin_count
     }

plugins/CuraEngineBackend/CuraEngineBackend.py

@@ -4,12 +4,12 @@
 import argparse #To run the engine in debug mode if the front-end is in debug mode.
 from collections import defaultdict
 import os
-from PyQt5.QtCore import QObject, QTimer, pyqtSlot
+from PyQt5.QtCore import QObject, QTimer, QUrl, pyqtSlot
 import sys
 from time import time
 from typing import Any, cast, Dict, List, Optional, Set, TYPE_CHECKING
 
-from PyQt5.QtGui import QImage
+from PyQt5.QtGui import QDesktopServices, QImage
 
 from UM.Backend.Backend import Backend, BackendState
 from UM.Scene.SceneNode import SceneNode
@@ -157,6 +157,18 @@ class CuraEngineBackend(QObject, Backend):
         self.determineAutoSlicing()
         application.getPreferences().preferenceChanged.connect(self._onPreferencesChanged)
 
+        self._slicing_error_message = Message(
+            text = catalog.i18nc("@message", "Slicing failed with an unexpected error. Please consider reporting a bug on our issue tracker."),
+            title = catalog.i18nc("@message:title", "Slicing failed")
+        )
+        self._slicing_error_message.addAction(
+            action_id = "report_bug",
+            name = catalog.i18nc("@message:button", "Report a bug"),
+            description = catalog.i18nc("@message:description", "Report a bug on Ultimaker Cura's issue tracker."),
+            icon = "[no_icon]"
+        )
+        self._slicing_error_message.actionTriggered.connect(self._reportBackendError)
+
         self._snapshot = None #type: Optional[QImage]
 
         application.initializationFinished.connect(self.initialize)
@@ -922,9 +934,22 @@ class CuraEngineBackend(QObject, Backend):
 
         if not self._restart:
             if self._process: # type: ignore
-                Logger.log("d", "Backend quit with return code %s. Resetting process and socket.", self._process.wait()) # type: ignore
+                return_code = self._process.wait()
+                if return_code != 0:
+                    Logger.log("e", f"Backend exited abnormally with return code {return_code}!")
+                    self._slicing_error_message.show()
+                    self.setState(BackendState.Error)
+                    self.stopSlicing()
+                else:
+                    Logger.log("d", "Backend finished slicing. Resetting process and socket.")
                 self._process = None # type: ignore
 
+    def _reportBackendError(self, _message_id: str, _action_id: str) -> None:
+        """
+        Triggered when the user wants to report an error in the back-end.
+        """
+        QDesktopServices.openUrl(QUrl("https://github.com/Ultimaker/Cura/issues/new/choose"))
+
     def _onGlobalStackChanged(self) -> None:
         """Called when the global container stack changes"""
 

plugins/CuraEngineBackend/plugin.json

@@ -2,7 +2,7 @@
     "name": "CuraEngine Backend",
     "author": "Ultimaker B.V.",
     "description": "Provides the link to the CuraEngine slicing backend.",
-    "api": "7.4.0",
+    "api": 7,
     "version": "1.0.1",
     "i18n-catalog": "cura"
 }

plugins/CuraProfileReader/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.1",
     "description": "Provides support for importing Cura profiles.",
-    "api": "7.4.0",
+    "api": 7,
     "i18n-catalog": "cura"
 }

plugins/CuraProfileWriter/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.1",
     "description": "Provides support for exporting Cura profiles.",
-    "api": "7.4.0",
+    "api": 7,
     "i18n-catalog":"cura"
 }

plugins/DigitalLibrary/__init__.py

@@ -0,0 +1,17 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from UM.MimeTypeDatabase import MimeType, MimeTypeDatabase
+from .src import DigitalFactoryFileProvider, DigitalFactoryOutputDevicePlugin, DigitalFactoryController
+
+
+def getMetaData():
+    return {}
+
+
+def register(app):
+    df_controller = DigitalFactoryController.DigitalFactoryController(app)
+    return {
+        "file_provider": DigitalFactoryFileProvider.DigitalFactoryFileProvider(df_controller),
+        "output_device": DigitalFactoryOutputDevicePlugin.DigitalFactoryOutputDevicePlugin(df_controller)
+    }

plugins/DigitalLibrary/plugin.json

@@ -0,0 +1,8 @@
+{
+    "name": "Ultimaker Digital Library",
+    "author": "Ultimaker B.V.",
+    "description": "Connects to the Digital Library, allowing Cura to open files from and save files to the Digital Library.",
+    "version": "1.0.0",
+    "api": 7,
+    "i18n-catalog": "cura"
+}

plugins/DigitalLibrary/resources/images/arrow_down.svg

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 25.2.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Artwork" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 24 24" style="enable-background:new 0 0 24 24;" xml:space="preserve">
+<polygon style="fill:#000E1A;" points="19.7,13.3 18.3,11.9 13,17.2 13,3 11,3 11,17.2 5.7,11.9 4.3,13.3 12,21 "/>
+</svg>

plugins/DigitalLibrary/resources/images/placeholder.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 48 48">
+  <path d="M24,44,7,33.4V14.6L24,4,41,14.6V33.4ZM9,32.3l15,9.3,15-9.3V15.7L24,6.4,9,15.7Z"/>
+</svg>

plugins/DigitalLibrary/resources/images/projects_not_found.svg

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 378.13 348.13" version="1.1">
+  <defs
+     id="defs7">
+    <style
+       id="style2">
+         .cls-2,.cls-6{fill:#c5dbfb;}
+         .cls-6,.cls-7{stroke-width:2px;}
+         .cls-7{fill:#f3f8fe;}
+         .cls-6,.cls-7{stroke:#061884;}
+      </style>
+  </defs>
+  <path class="cls-2" d="M43,17V3H83a2,2,0,0,1,2,2V17Z" />
+  <path fill="white" d="M 3 1 C 1.8954305 1 1 1.8954305 1 3 L 1 67 C 1 68.104569 1.8954305 69 3 69 L 72.152344 69 A 100 100 0 0 1 89 49.873047 L 89 19 C 89 17.895431 88.104569 17 87 17 L 56 17 L 40 1 L 3 1 z " />
+  <path fill="#c5dbfb" d="M 3 0 C 1.3549904 0 0 1.3549904 0 3 L 0 67 C 0 68.64501 1.3549904 70 3 70 L 71.484375 70 A 100 100 0 0 1 72.835938 68 L 3 68 C 2.4358706 68 2 67.564129 2 67 L 2 3 C 2 2.4358706 2.4358706 2 3 2 L 39.585938 2 L 55.585938 18 L 87 18 C 87.564129 18 88 18.435871 88 19 L 88 50.765625 A 100 100 0 0 1 90 49.007812 L 90 19 C 90 17.35499 88.64501 16 87 16 L 56.414062 16 L 40.414062 0 L 3 0 z " />
+  <path class="cls-2" d="M153,17V3h40a2,2,0,0,1,2,2V17Z" />
+  <path fill="white" d="M 113 1 C 111.89543 1 111 1.8954305 111 3 L 111 35.201172 A 100 100 0 0 1 155 25 A 100 100 0 0 1 199 35.201172 L 199 19 C 199 17.895431 198.10457 17 197 17 L 166 17 L 150 1 L 113 1 z " />
+  <path fill="#c5dbfb" d="M 113 0 C 111.35499 0 110 1.3549904 110 3 L 110 35.699219 A 100 100 0 0 1 112 34.716797 L 112 3 C 112 2.4358706 112.43587 2 113 2 L 149.58594 2 L 165.58594 18 L 197 18 C 197.56413 18 198 18.435871 198 19 L 198 34.716797 A 100 100 0 0 1 200 35.699219 L 200 19 C 200 17.35499 198.64501 16 197 16 L 166.41406 16 L 150.41406 0 L 113 0 z " />
+  <path class="cls-2" d="M263,17V3h40a2,2,0,0,1,2,2V17Z" />
+  <path fill="white" d="M 223 1 C 221.89543 1 221 1.8954305 221 3 L 221 49.875 A 100 100 0 0 1 237.84961 69 L 307 69 C 308.10457 69 309 68.104569 309 67 L 309 19 C 309 17.895431 308.10457 17 307 17 L 276 17 L 260 1 L 223 1 z " />
+  <path fill="#c5dbfb" d="M 223 0 C 221.35499 0 220 1.3549904 220 3 L 220 49.005859 A 100 100 0 0 1 222 50.765625 L 222 3 C 222 2.4358706 222.43587 2 223 2 L 259.58594 2 L 275.58594 18 L 307 18 C 307.56413 18 308 18.435871 308 19 L 308 67 C 308 67.564129 307.56413 68 307 68 L 237.16406 68 A 100 100 0 0 1 238.51562 70 L 307 70 C 308.64501 70 310 68.64501 310 67 L 310 19 C 310 17.35499 308.64501 16 307 16 L 276.41406 16 L 260.41406 0 L 223 0 z " />
+  <path fill="#c5dbfb" d="M 43 93 L 43 107 L 56.634766 107 A 100 100 0 0 1 60.259766 93 L 43 93 z " />
+  <path fill="white" d="M 3 91 C 1.8954305 91 1 91.895431 1 93 L 1 157 C 1 158.10457 1.8954305 159 3 159 L 60.958984 159 A 100 100 0 0 1 55 125 A 100 100 0 0 1 56.634766 107 L 56 107 L 40 91 L 3 91 z " />
+  <path fill="#c5dbfb" d="M 3 90 C 1.3549904 90 0 91.35499 0 93 L 0 157 C 0 158.64501 1.3549904 160 3 160 L 61.324219 160 A 100 100 0 0 1 60.603516 158 L 3 158 C 2.4358706 158 2 157.56413 2 157 L 2 93 C 2 92.435871 2.4358706 92 3 92 L 39.585938 92 L 55.585938 108 L 56.455078 108 A 100 100 0 0 1 56.822266 106 L 56.414062 106 L 40.414062 90 L 3 90 z " />
+  <path class="cls-2" d="M263,107V93h40a2,2,0,0,1,2,2v12Z" />
+  <path fill="white" d="M 249.04102 91 A 100 100 0 0 1 255 125 A 100 100 0 0 1 249.04102 159 L 307 159 C 308.10457 159 309 158.10457 309 157 L 309 109 C 309 107.89543 308.10457 107 307 107 L 276 107 L 260 91 L 249.04102 91 z " />
+  <path fill="#c5dbfb" d="M 248.67578 90 A 100 100 0 0 1 249.39648 92 L 259.58594 92 L 275.58594 108 L 307 108 C 307.56413 108 308 108.43587 308 109 L 308 157 C 308 157.56413 307.56413 158 307 158 L 249.39844 158 A 100 100 0 0 1 248.67383 160 L 307 160 C 308.64501 160 310 158.64501 310 157 L 310 109 C 310 107.35499 308.64501 106 307 106 L 276.41406 106 L 260.41406 90 L 248.67578 90 z " />
+  <path fill="#c5dbfb" d="M 43 183 L 43 197 L 85 197 L 85 196.41406 A 100 100 0 0 1 73.539062 183 L 43 183 z " />
+  <path fill="white" d="M 3 181 C 1.8954305 181 1 181.89543 1 183 L 1 247 C 1 248.10457 1.8954305 249 3 249 L 87 249 C 88.104569 249 89 248.10457 89 247 L 89 200.125 A 100 100 0 0 1 85.603516 197 L 56 197 L 40 181 L 3 181 z " />
+  <path fill="#c5dbfb" d="M 3 180 C 1.3549904 180 0 181.35499 0 183 L 0 247 C 0 248.64501 1.3549904 250 3 250 L 87 250 C 88.64501 250 90 248.64501 90 247 L 90 200.99414 A 100 100 0 0 1 88 199.23438 L 88 247 C 88 247.56413 87.564129 248 87 248 L 3 248 C 2.4358706 248 2 247.56413 2 247 L 2 183 C 2 182.43587 2.4358706 182 3 182 L 39.585938 182 L 55.585938 198 L 86.65625 198 A 100 100 0 0 1 84.580078 196 L 56.414062 196 L 40.414062 180 L 3 180 z " />
+  <path fill="white" d="M 111 214.79883 L 111 247 C 111 248.10457 111.89543 249 113 249 L 197 249 C 198.10457 249 199 248.10457 199 247 L 199 214.79883 A 100 100 0 0 1 155 225 A 100 100 0 0 1 111 214.79883 z " />
+  <path fill="#c5dbfb" d="M 110 214.30078 L 110 247 C 110 248.64501 111.35499 250 113 250 L 197 250 C 198.64501 250 200 248.64501 200 247 L 200 214.30078 A 100 100 0 0 1 198 215.2832 L 198 247 C 198 247.56413 197.56413 248 197 248 L 113 248 C 112.43587 248 112 247.56413 112 247 L 112 215.2832 A 100 100 0 0 1 110 214.30078 z " />
+  <path class="cls-2" d="M263,197V183h40a2,2,0,0,1,2,2v12Z" />
+  <path fill="white" d="M 237.84766 181 A 100 100 0 0 1 221 200.12695 L 221 247 C 221 248.10457 221.89543 249 223 249 L 307 249 C 308.10457 249 309 248.10457 309 247 L 309 199 C 309 197.89543 308.10457 197 307 197 L 276 197 L 260 181 L 237.84766 181 z " />
+  <path fill="#c5dbfb" d="M 238.51562 180 A 100 100 0 0 1 237.16406 182 L 259.58594 182 L 275.58594 198 L 307 198 C 307.56413 198 308 198.43587 308 199 L 308 247 C 308 247.56413 307.56413 248 307 248 L 223 248 C 222.43587 248 222 247.56413 222 247 L 222 199.23438 A 100 100 0 0 1 220 200.99219 L 220 247 C 220 248.64501 221.35499 250 223 250 L 307 250 C 308.64501 250 310 248.64501 310 247 L 310 199 C 310 197.35499 308.64501 196 307 196 L 276.41406 196 L 260.41406 180 L 238.51562 180 z " />
+  <path class="cls-6" d="M351.12,322.62h20a10,10,0,0,1,10,10v7a0,0,0,0,1,0,0h-40a0,0,0,0,1,0,0v-7A10,10,0,0,1,351.12,322.62Z" transform="translate(850.61 309.91) rotate(135)" />
+  <rect class="cls-7" x="293.75" y="225.25" width="40" height="117" transform="translate(-108.74 304.96) rotate(-45)" />
+  <polyline class="cls-7" points="213.69 199.25 252.58 238.14 267.43 223.29 228.54 184.4" />
+  <path fill="white" stroke="#061884" stroke-width="2px" d="M 154.94141 30 A 95 95 0 0 0 60 125 A 95 95 0 0 0 155 220 A 95 95 0 0 0 250 125 A 95 95 0 0 0 155 30 A 95 95 0 0 0 154.94141 30 z M 154.82812 40 A 85 85 0 0 1 155 40 A 85 85 0 0 1 240 125 A 85 85 0 0 1 155 210 A 85 85 0 0 1 70 125 A 85 85 0 0 1 154.82812 40 z " />
+  <path class="cls-6" d="M256.37,227.87h20a10,10,0,0,1,10,10v7a0,0,0,0,1,0,0h-40a0,0,0,0,1,0,0v-7a10,10,0,0,1,10-10Z" transform="translate(-89.12 257.58) rotate(-45)" />
+  <path fill="white" d="M 154.94141 45 A 80 80 0 0 0 111 58.185547 L 111 67 C 111 68.104569 111.89543 69 113 69 L 197 69 C 198.10457 69 199 68.104569 199 67 L 199 58.1875 A 80 80 0 0 0 155 45 A 80 80 0 0 0 154.94141 45 z " />
+  <path fill="#061884" d="M 112 57.539062 A 80 80 0 0 0 110 58.857422 L 110 67 C 110 68.64501 111.35499 70 113 70 L 197 70 C 198.64501 70 200 68.64501 200 67 L 200 58.857422 A 80 80 0 0 0 198 57.541016 L 198 67 C 198 67.564129 197.56413 68 197 68 L 113 68 C 112.43587 68 112 67.564129 112 67 L 112 57.539062 z " />
+  <path fill="#196ef0" d="M 81.679688 93 A 80 80 0 0 0 77.050781 107 L 85 107 L 85 95 A 2 2 0 0 0 83 93 L 81.679688 93 z " />
+  <path fill="white" d="M 77.050781 107 A 80 80 0 0 0 75 125 A 80 80 0 0 0 82.585938 159 L 87 159 C 88.104569 159 89 158.10457 89 157 L 89 109 C 89 107.89543 88.104569 107 87 107 L 77.050781 107 z " />
+  <path fill="#061884" d="M 77.289062 106 A 80 80 0 0 0 76.828125 108 L 87 108 C 87.564129 108 88 108.43587 88 109 L 88 157 C 88 157.56413 87.564129 158 87 158 L 82.125 158 A 80 80 0 0 0 83.0625 160 L 87 160 C 88.64501 160 90 158.64501 90 157 L 90 109 C 90 107.35499 88.64501 106 87 106 L 77.289062 106 z " />
+  <path fill="white" d="M 223 91 C 221.89543 91 221 91.895431 221 93 L 221 157 C 221 158.10457 221.89543 159 223 159 L 227.41406 159 A 80 80 0 0 0 235 125 A 80 80 0 0 0 227.41406 91 L 223 91 z " />
+  <path fill="#061884" d="M 223 90 C 221.35499 90 220 91.35499 220 93 L 220 157 C 220 158.64501 221.35499 160 223 160 L 226.9375 160 A 80 80 0 0 0 227.87695 158 L 223 158 C 222.43587 158 222 157.56413 222 157 L 222 93 C 222 92.435871 222.43587 92 223 92 L 227.875 92 A 80 80 0 0 0 226.9375 90 L 223 90 z " />
+  <path fill="#196ef0" d="M 153 183 L 153 197 L 189.86914 197 A 80 80 0 0 0 195 194.28125 L 195 185 A 2 2 0 0 0 193 183 L 153 183 z "/>
+  <path fill="white" d="M 113 181 C 111.89543 181 111 181.89543 111 183 L 111 191.8125 A 80 80 0 0 0 155 205 A 80 80 0 0 0 189.86914 197 L 166 197 L 150 181 L 113 181 z " />
+  <path fill="#061884" d="M 113 180 C 111.35499 180 110 181.35499 110 183 L 110 191.14258 A 80 80 0 0 0 112 192.45898 L 112 183 C 112 182.43587 112.43587 182 113 182 L 149.58594 182 L 165.58594 198 L 187.72461 198 A 80 80 0 0 0 191.86328 196 L 166.41406 196 L 150.41406 180 L 113 180 z " />
+  <path fill="#061884" d="m 149.18,133.69 v -3.48 a 14.36,14.36 0 0 1 1.74,-7.25 20.17,20.17 0 0 1 6.4,-6.17 25.87,25.87 0 0 0 5.68,-4.79 7,7 0 0 0 1.48,-4.34 4.13,4.13 0 0 0 -1.93,-3.62 9,9 0 0 0 -5.14,-1.3 24.94,24.94 0 0 0 -7.34,1.16 45.2,45.2 0 0 0 -7.78,3.31 l -5.37,-10.64 a 48.41,48.41 0 0 1 9.89,-4.21 40.25,40.25 0 0 1 11.67,-1.61 q 9.57,0 14.9,4.43 a 14.16,14.16 0 0 1 5.32,11.41 15.41,15.41 0 0 1 -2.55,9 30.38,30.38 0 0 1 -7.92,7.34 32.11,32.11 0 0 0 -5.23,4.37 5.91,5.91 0 0 0 -1.34,4 v 2.41 z m -1.61,15.12 q 0,-4.38 2.46,-6.12 a 10,10 0 0 1 5.95,-1.75 9.69,9.69 0 0 1 5.77,1.75 q 2.46,1.74 2.46,6.12 0,4.22 -2.46,6 a 9.42,9.42 0 0 1 -5.77,1.84 9.69,9.69 0 0 1 -5.95,-1.84 q -2.46,-1.81 -2.46,-6 z" />
+</svg>

plugins/DigitalLibrary/resources/images/update.svg

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 25.2.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Artwork" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 24 24" style="enable-background:new 0 0 24 24;" xml:space="preserve">
+<path d="M12,19.6L4.4,12L7,9.4V12h2V6H3v2h2.6L3.7,9.9c-1.2,1.2-1.2,3.1,0,4.2l6.2,6.2c1.2,1.2,3.1,1.2,4.2,0l0.6-0.6l-1.4-1.4
+	L12,19.6z"/>
+<path d="M20.3,9.9l-6.2-6.2c-1.2-1.2-3.1-1.2-4.2,0L9.3,4.3l1.4,1.4L12,4.4l7.6,7.6L17,14.6V12h-2v6h6v-2h-2.6l1.9-1.9
+	C21.5,12.9,21.5,11.1,20.3,9.9z"/>
+</svg>

plugins/DigitalLibrary/resources/qml/CreateNewProjectPopup.qml

@@ -0,0 +1,159 @@
+// Copyright (C) 2021 Ultimaker B.V.
+
+import QtQuick 2.10
+import QtQuick.Window 2.2
+import QtQuick.Controls 1.4 as OldControls // TableView doesn't exist in the QtQuick Controls 2.x in 5.10, so use the old one
+import QtQuick.Controls 2.3
+import QtQuick.Controls.Styles 1.4
+
+import UM 1.2 as UM
+import Cura 1.6 as Cura
+
+import DigitalFactory 1.0 as DF
+
+
+Popup
+{
+    id: base
+
+    padding: UM.Theme.getSize("default_margin").width
+
+    closePolicy: Popup.CloseOnEscape
+    focus: true
+    modal: true
+    background: Cura.RoundedRectangle
+    {
+        cornerSide: Cura.RoundedRectangle.Direction.All
+        border.color: UM.Theme.getColor("lining")
+        border.width: UM.Theme.getSize("default_lining").width
+        radius: UM.Theme.getSize("default_radius").width
+        width: parent.width
+        height: parent.height
+        color: UM.Theme.getColor("main_background")
+    }
+
+    Connections
+    {
+        target: manager
+
+        function onCreatingNewProjectStatusChanged(status)
+        {
+            if (status == DF.RetrievalStatus.Success)
+            {
+                base.close();
+            }
+        }
+    }
+
+    onOpened:
+    {
+        newProjectNameTextField.text = ""
+        newProjectNameTextField.focus = true
+    }
+
+    Label
+    {
+        id: createNewLibraryProjectLabel
+        text: "Create new Library project"
+        font: UM.Theme.getFont("medium")
+        color: UM.Theme.getColor("small_button_text")
+        anchors
+        {
+            top: parent.top
+            left: parent.left
+            right: parent.right
+        }
+    }
+
+    Label
+    {
+        id: projectNameLabel
+        text: "Project Name"
+        font: UM.Theme.getFont("default")
+        color: UM.Theme.getColor("text")
+        anchors
+        {
+            top: createNewLibraryProjectLabel.bottom
+            topMargin: UM.Theme.getSize("default_margin").width
+            left: parent.left
+            right: parent.right
+        }
+    }
+
+    Cura.TextField
+    {
+        id: newProjectNameTextField
+        width: parent.width
+        anchors
+        {
+            top: projectNameLabel.bottom
+            topMargin: UM.Theme.getSize("thin_margin").width
+            left: parent.left
+            right: parent.right
+        }
+        validator: RegExpValidator
+        {
+            regExp: /^[^\\\/\*\?\|\[\]]{0,99}$/
+        }
+
+        text: PrintInformation.jobName
+        font: UM.Theme.getFont("default")
+        placeholderText: "Enter a name for your new project."
+        onAccepted:
+        {
+            if (verifyProjectCreationButton.enabled)
+            {
+                verifyProjectCreationButton.clicked()
+            }
+        }
+    }
+
+    Label
+    {
+        id: errorWhileCreatingProjectLabel
+        text: manager.projectCreationErrorText
+        width: parent.width
+        wrapMode: Text.WordWrap
+        font: UM.Theme.getFont("default")
+        color: UM.Theme.getColor("error")
+        visible: manager.creatingNewProjectStatus == DF.RetrievalStatus.Failed
+        anchors
+        {
+            top: newProjectNameTextField.bottom
+            left: parent.left
+            right: parent.right
+        }
+    }
+
+    Cura.SecondaryButton
+    {
+        id: cancelProjectCreationButton
+
+        anchors.bottom: parent.bottom
+        anchors.left: parent.left
+
+        text: "Cancel"
+
+        onClicked:
+        {
+            base.close()
+        }
+        busy: false
+    }
+
+    Cura.PrimaryButton
+    {
+        id: verifyProjectCreationButton
+
+        anchors.bottom: parent.bottom
+        anchors.right: parent.right
+        text: "Create"
+        enabled: newProjectNameTextField.text.length >= 2 && !busy
+
+        onClicked:
+        {
+            manager.createLibraryProjectAndSetAsPreselected(newProjectNameTextField.text)
+        }
+        busy: manager.creatingNewProjectStatus == DF.RetrievalStatus.InProgress
+    }
+}

plugins/DigitalLibrary/resources/qml/DigitalFactoryOpenDialog.qml

@@ -0,0 +1,61 @@
+// Copyright (C) 2021 Ultimaker B.V.
+
+import QtQuick 2.10
+import QtQuick.Window 2.2
+import QtQuick.Controls 1.4 as OldControls // TableView doesn't exist in the QtQuick Controls 2.x in 5.10, so use the old one
+import QtQuick.Controls 2.3
+import QtQuick.Controls.Styles 1.4
+
+import UM 1.2 as UM
+import Cura 1.6 as Cura
+
+import DigitalFactory 1.0 as DF
+
+Window
+{
+    id: digitalFactoryOpenDialogBase
+    title: "Open file from Library"
+
+    modality: Qt.ApplicationModal
+    width: 800 * screenScaleFactor
+    height: 600 * screenScaleFactor
+    minimumWidth: 800 * screenScaleFactor
+    minimumHeight: 600 * screenScaleFactor
+
+    Shortcut
+    {
+        sequence: "Esc"
+        onActivated: digitalFactoryOpenDialogBase.close()
+    }
+    color: UM.Theme.getColor("main_background")
+
+    SelectProjectPage
+    {
+        visible: manager.selectedProjectIndex == -1
+        createNewProjectButtonVisible: false
+    }
+
+    OpenProjectFilesPage
+    {
+        visible: manager.selectedProjectIndex >= 0
+        onOpenFilePressed: digitalFactoryOpenDialogBase.close()
+    }
+
+
+    BusyIndicator
+    {
+        // Shows up while Cura is waiting to receive the user's projects from the digital factory library
+        id: retrievingProjectsBusyIndicator
+
+        anchors {
+            verticalCenter: parent.verticalCenter
+            horizontalCenter: parent.horizontalCenter
+        }
+
+        width: parent.width / 4
+        height: width
+        visible: manager.retrievingProjectsStatus == DF.RetrievalStatus.InProgress
+        running: visible
+        palette.dark: UM.Theme.getColor("text")
+    }
+}

plugins/DigitalLibrary/resources/qml/DigitalFactorySaveDialog.qml

@@ -0,0 +1,62 @@
+// Copyright (C) 2021 Ultimaker B.V.
+
+import QtQuick 2.10
+import QtQuick.Window 2.2
+import QtQuick.Controls 1.4 as OldControls // TableView doesn't exist in the QtQuick Controls 2.x in 5.10, so use the old one
+import QtQuick.Controls 2.3
+import QtQuick.Controls.Styles 1.4
+
+import UM 1.2 as UM
+import Cura 1.6 as Cura
+
+import DigitalFactory 1.0 as DF
+
+Window
+{
+    id: digitalFactorySaveDialogBase
+    title: "Save Cura project to Library"
+
+    modality: Qt.ApplicationModal
+    width: 800 * screenScaleFactor
+    height: 600 * screenScaleFactor
+    minimumWidth: 800 * screenScaleFactor
+    minimumHeight: 600 * screenScaleFactor
+
+    Shortcut
+    {
+        sequence: "Esc"
+        onActivated: digitalFactorySaveDialogBase.close()
+    }
+    color: UM.Theme.getColor("main_background")
+
+    SelectProjectPage
+    {
+        visible: manager.selectedProjectIndex == -1
+        createNewProjectButtonVisible: true
+    }
+
+    SaveProjectFilesPage
+    {
+        visible: manager.selectedProjectIndex >= 0
+        onSavePressed: digitalFactorySaveDialogBase.close()
+        onSelectDifferentProjectPressed: manager.clearProjectSelection()
+    }
+
+
+    BusyIndicator
+    {
+        // Shows up while Cura is waiting to receive the user's projects from the digital factory library
+        id: retrievingProjectsBusyIndicator
+
+        anchors {
+            verticalCenter: parent.verticalCenter
+            horizontalCenter: parent.horizontalCenter
+        }
+
+        width: parent.width / 4
+        height: width
+        visible: manager.retrievingProjectsStatus == DF.RetrievalStatus.InProgress
+        running: visible
+        palette.dark: UM.Theme.getColor("text")
+    }
+}

plugins/DigitalLibrary/resources/qml/LoadMoreProjectsCard.qml

@@ -0,0 +1,129 @@
+// Copyright (C) 2021 Ultimaker B.V.
+import QtQuick 2.10
+import QtQuick.Controls 2.3
+
+import UM 1.2 as UM
+import Cura 1.6 as Cura
+
+Cura.RoundedRectangle
+{
+    id: base
+    cornerSide: Cura.RoundedRectangle.Direction.All
+    border.color: UM.Theme.getColor("lining")
+    border.width: UM.Theme.getSize("default_lining").width
+    radius: UM.Theme.getSize("default_radius").width
+    signal clicked()
+    property var hasMoreProjectsToLoad
+    enabled: hasMoreProjectsToLoad
+    color: UM.Theme.getColor("main_background")
+
+    MouseArea
+    {
+        id: cardMouseArea
+        anchors.fill: parent
+        hoverEnabled: true
+    }
+
+    Row
+    {
+        id: projectInformationRow
+        anchors.horizontalCenter: parent.horizontalCenter
+        anchors.verticalCenter: parent.verticalCenter
+
+        UM.RecolorImage
+        {
+            id: projectImage
+            anchors.verticalCenter: parent.verticalCenter
+            width: UM.Theme.getSize("section").height
+            height: width
+            color: UM.Theme.getColor("text_link")
+            source: "../images/arrow_down.svg"
+        }
+
+        Label
+        {
+            id: displayNameLabel
+            anchors.verticalCenter: parent.verticalCenter
+            text: "Load more projects"
+            color: UM.Theme.getColor("text_link")
+            font: UM.Theme.getFont("medium_bold")
+        }
+    }
+
+    Component.onCompleted:
+    {
+        cardMouseArea.clicked.connect(base.clicked)
+    }
+
+    states:
+    [
+        State
+        {
+            name: "canLoadMoreProjectsAndHovered";
+            when: base.hasMoreProjectsToLoad && cardMouseArea.containsMouse
+            PropertyChanges
+            {
+                target: projectImage
+                color: UM.Theme.getColor("text_link")
+                source: "../images/arrow_down.svg"
+            }
+            PropertyChanges
+            {
+                target: displayNameLabel
+                color: UM.Theme.getColor("text_link")
+                text: "Load more projects"
+            }
+            PropertyChanges
+            {
+                target: base
+                color: UM.Theme.getColor("action_button_hovered")
+            }
+        },
+
+        State
+        {
+            name: "canLoadMoreProjectsAndNotHovered";
+            when: base.hasMoreProjectsToLoad && !cardMouseArea.containsMouse
+            PropertyChanges
+            {
+                target: projectImage
+                color: UM.Theme.getColor("text_link")
+                source: "../images/arrow_down.svg"
+            }
+            PropertyChanges
+            {
+                target: displayNameLabel
+                color: UM.Theme.getColor("text_link")
+                text: "Load more projects"
+            }
+            PropertyChanges
+            {
+                target: base
+                color: UM.Theme.getColor("main_background")
+            }
+        },
+
+        State
+        {
+            name: "noMoreProjectsToLoad"
+            when: !base.hasMoreProjectsToLoad
+            PropertyChanges
+            {
+                target: projectImage
+                color: UM.Theme.getColor("action_button_disabled_text")
+                source: "../images/update.svg"
+            }
+            PropertyChanges
+            {
+                target: displayNameLabel
+                color: UM.Theme.getColor("action_button_disabled_text")
+                text: "No more projects to load"
+            }
+            PropertyChanges
+            {
+                target: base
+                color: UM.Theme.getColor("action_button_disabled")
+            }
+        }
+    ]
+}

plugins/DigitalLibrary/resources/qml/OpenProjectFilesPage.qml

@@ -0,0 +1,203 @@
+// Copyright (C) 2021 Ultimaker B.V.
+
+import QtQuick 2.10
+import QtQuick.Window 2.2
+import QtQuick.Controls 1.4 as OldControls // TableView doesn't exist in the QtQuick Controls 2.x in 5.10, so use the old one
+import QtQuick.Controls 2.3
+import QtQuick.Controls.Styles 1.4
+
+import UM 1.2 as UM
+import Cura 1.6 as Cura
+
+import DigitalFactory 1.0 as DF
+
+
+Item
+{
+    id: base
+    width: parent.width
+    height: parent.height
+
+    property var fileModel: manager.digitalFactoryFileModel
+
+    signal openFilePressed()
+    signal selectDifferentProjectPressed()
+
+    anchors
+    {
+        fill: parent
+        margins: UM.Theme.getSize("default_margin").width
+    }
+
+    ProjectSummaryCard
+    {
+        id: projectSummaryCard
+
+        anchors.top: parent.top
+
+        property var selectedItem: manager.digitalFactoryProjectModel.getItem(manager.selectedProjectIndex)
+        
+        imageSource: selectedItem.thumbnailUrl || "../images/placeholder.svg"
+        projectNameText: selectedItem.displayName || ""
+        projectUsernameText: selectedItem.username || ""
+        projectLastUpdatedText: "Last updated: " + selectedItem.lastUpdated
+        cardMouseAreaEnabled: false
+    }
+    
+    Rectangle
+    {
+        id: projectFilesContent
+        width: parent.width
+        anchors.top: projectSummaryCard.bottom
+        anchors.topMargin: UM.Theme.getSize("default_margin").width
+        anchors.bottom: selectDifferentProjectButton.top
+        anchors.bottomMargin: UM.Theme.getSize("default_margin").width
+
+        color: UM.Theme.getColor("main_background")
+        border.width: UM.Theme.getSize("default_lining").width
+        border.color: UM.Theme.getColor("lining")
+
+
+        Cura.TableView
+        {
+            id: filesTableView
+            anchors.fill: parent
+            model: manager.digitalFactoryFileModel
+            visible: model.count != 0 && manager.retrievingFileStatus != DF.RetrievalStatus.InProgress
+            selectionMode: OldControls.SelectionMode.SingleSelection
+            onDoubleClicked:
+            {
+                manager.setSelectedFileIndices([row]);
+                openFilesButton.clicked();
+            }
+
+            OldControls.TableViewColumn
+            {
+                id: fileNameColumn
+                role: "fileName"
+                title: "Name"
+                width: Math.round(filesTableView.width / 3)
+            }
+
+            OldControls.TableViewColumn
+            {
+                id: usernameColumn
+                role: "username"
+                title: "Uploaded by"
+                width: Math.round(filesTableView.width / 3)
+            }
+
+            OldControls.TableViewColumn
+            {
+                role: "uploadedAt"
+                title: "Uploaded at"
+            }
+
+            Connections
+            {
+                target: filesTableView.selection
+                function onSelectionChanged()
+                {
+                    let newSelection = [];
+                    filesTableView.selection.forEach(function(rowIndex) { newSelection.push(rowIndex); });
+                    manager.setSelectedFileIndices(newSelection);
+                }
+            }
+        }
+
+        Label
+        {
+            id: emptyProjectLabel
+            anchors.horizontalCenter: parent.horizontalCenter
+            anchors.verticalCenter: parent.verticalCenter
+            text: "Select a project to view its files."
+            font: UM.Theme.getFont("default")
+            color: UM.Theme.getColor("setting_category_text")
+
+            Connections
+            {
+                target: manager
+                function onSelectedProjectIndexChanged(newProjectIndex)
+                {
+                    emptyProjectLabel.visible = (newProjectIndex == -1)
+                }
+            }
+        }
+
+        Label
+        {
+            id: noFilesInProjectLabel
+            anchors.horizontalCenter: parent.horizontalCenter
+            anchors.verticalCenter: parent.verticalCenter
+            visible: (manager.digitalFactoryFileModel.count == 0 && !emptyProjectLabel.visible && !retrievingFilesBusyIndicator.visible)
+            text: "No supported files in this project."
+            font: UM.Theme.getFont("default")
+            color: UM.Theme.getColor("setting_category_text")
+        }
+
+        BusyIndicator
+        {
+            // Shows up while Cura is waiting to receive the files of a project from the digital factory library
+            id: retrievingFilesBusyIndicator
+
+            anchors
+            {
+                verticalCenter: parent.verticalCenter
+                horizontalCenter: parent.horizontalCenter
+            }
+
+            width: parent.width / 4
+            height: width
+            visible: manager.retrievingFilesStatus == DF.RetrievalStatus.InProgress
+            running: visible
+            palette.dark: UM.Theme.getColor("text")
+        }
+
+        Connections
+        {
+            target: manager.digitalFactoryFileModel
+
+            function onItemsChanged()
+            {
+                // Make sure no files are selected when the file model changes
+                filesTableView.currentRow = -1
+                filesTableView.selection.clear()
+            }
+        }
+    }
+    Cura.SecondaryButton
+    {
+        id: selectDifferentProjectButton
+
+        anchors.bottom: parent.bottom
+        anchors.left: parent.left
+        text: "Change Library project"
+
+        onClicked:
+        {
+            manager.clearProjectSelection()
+        }
+        busy: false
+    }
+
+    Cura.PrimaryButton
+    {
+        id: openFilesButton
+
+        anchors.bottom: parent.bottom
+        anchors.right: parent.right
+        text: "Open"
+        enabled: filesTableView.selection.count > 0
+        onClicked:
+        {
+            manager.openSelectedFiles()
+        }
+        busy: false
+    }
+
+    Component.onCompleted:
+    {
+        openFilesButton.clicked.connect(base.openFilePressed)
+        selectDifferentProjectButton.clicked.connect(base.selectDifferentProjectPressed)
+    }
+}

plugins/DigitalLibrary/resources/qml/ProjectSummaryCard.qml

@@ -0,0 +1,92 @@
+// Copyright (C) 2021 Ultimaker B.V.
+import QtQuick 2.10
+import QtQuick.Controls 2.3
+
+import UM 1.2 as UM
+import Cura 1.6 as Cura
+
+Cura.RoundedRectangle
+{
+    id: base
+    width: parent.width
+    height: projectImage.height + 2 * UM.Theme.getSize("default_margin").width
+    cornerSide: Cura.RoundedRectangle.Direction.All
+    border.color: UM.Theme.getColor("lining")
+    border.width: UM.Theme.getSize("default_lining").width
+    radius: UM.Theme.getSize("default_radius").width
+    color: UM.Theme.getColor("main_background")
+    signal clicked()
+    property alias imageSource: projectImage.source
+    property alias projectNameText: displayNameLabel.text
+    property alias projectUsernameText: usernameLabel.text
+    property alias projectLastUpdatedText: lastUpdatedLabel.text
+    property alias cardMouseAreaEnabled: cardMouseArea.enabled
+
+    onVisibleChanged: color = UM.Theme.getColor("main_background")
+
+    MouseArea
+    {
+        id: cardMouseArea
+        anchors.fill: parent
+        hoverEnabled: true
+        onEntered: base.color = UM.Theme.getColor("action_button_hovered")
+        onExited: base.color = UM.Theme.getColor("main_background")
+        onClicked: base.clicked()
+    }
+    Row
+    {
+        id: projectInformationRow
+        width: parent.width
+        padding: UM.Theme.getSize("default_margin").width
+        spacing: UM.Theme.getSize("default_margin").width
+
+        Image
+        {
+            id: projectImage
+            anchors.verticalCenter: parent.verticalCenter
+            width: UM.Theme.getSize("toolbox_thumbnail_small").width
+            height: Math.round(width * 3/4)
+            sourceSize.width: width
+            sourceSize.height: height
+            fillMode: Image.PreserveAspectFit
+            mipmap: true
+        }
+        Column
+        {
+            id: projectLabelsColumn
+            height: projectImage.height
+            width: parent.width - x - UM.Theme.getSize("default_margin").width
+            anchors.verticalCenter: parent.verticalCenter
+
+            Label
+            {
+                id: displayNameLabel
+                width: parent.width
+                height: Math.round(parent.height / 3)
+                elide: Text.ElideRight
+                color: UM.Theme.getColor("text")
+                font: UM.Theme.getFont("default_bold")
+            }
+
+            Label
+            {
+                id: usernameLabel
+                width: parent.width
+                height: Math.round(parent.height / 3)
+                elide: Text.ElideRight
+                color: UM.Theme.getColor("small_button_text")
+                font: UM.Theme.getFont("default")
+            }
+
+            Label
+            {
+                id: lastUpdatedLabel
+                width: parent.width
+                height: Math.round(parent.height / 3)
+                elide: Text.ElideRight
+                color: UM.Theme.getColor("small_button_text")
+                font: UM.Theme.getFont("default")
+            }
+        }
+    }
+}

plugins/DigitalLibrary/resources/qml/SaveProjectFilesPage.qml

@@ -0,0 +1,259 @@
+// Copyright (C) 2021 Ultimaker B.V.
+
+import QtQuick 2.10
+import QtQuick.Window 2.2
+import QtQuick.Controls 1.4 as OldControls // TableView doesn't exist in the QtQuick Controls 2.x in 5.10, so use the old one
+import QtQuick.Controls 2.3
+import QtQuick.Controls.Styles 1.4
+
+import UM 1.2 as UM
+import Cura 1.6 as Cura
+
+import DigitalFactory 1.0 as DF
+
+
+Item
+{
+    id: base
+    width: parent.width
+    height: parent.height
+    property var fileModel: manager.digitalFactoryFileModel
+
+    signal savePressed()
+    signal selectDifferentProjectPressed()
+
+    anchors
+    {
+        fill: parent
+        margins: UM.Theme.getSize("default_margin").width
+    }
+
+    ProjectSummaryCard
+    {
+        id: projectSummaryCard
+
+        anchors.top: parent.top
+
+        property var selectedItem: manager.digitalFactoryProjectModel.getItem(manager.selectedProjectIndex)
+
+        imageSource: selectedItem.thumbnailUrl || "../images/placeholder.svg"
+        projectNameText: selectedItem.displayName || ""
+        projectUsernameText: selectedItem.username || ""
+        projectLastUpdatedText: "Last updated: " + selectedItem.lastUpdated
+        cardMouseAreaEnabled: false
+    }
+
+    Label
+    {
+        id: fileNameLabel
+        anchors.top: projectSummaryCard.bottom
+        anchors.topMargin: UM.Theme.getSize("default_margin").height
+        text: "Cura project name"
+        font: UM.Theme.getFont("medium")
+        color: UM.Theme.getColor("text")
+    }
+
+
+    Cura.TextField
+    {
+        id: dfFilenameTextfield
+        width: parent.width
+        anchors.left: parent.left
+        anchors.top: fileNameLabel.bottom
+        anchors.topMargin: UM.Theme.getSize("thin_margin").height
+        validator: RegExpValidator
+        {
+            regExp: /^[\w\-\. ()]{0,255}$/
+        }
+
+        text: PrintInformation.jobName
+        font: UM.Theme.getFont("medium")
+        placeholderText: "Enter the name of the file."
+        onAccepted: { if (saveButton.enabled) {saveButton.clicked()}}
+    }
+
+
+    Rectangle
+    {
+        id: projectFilesContent
+        width: parent.width
+        anchors.top: dfFilenameTextfield.bottom
+        anchors.topMargin: UM.Theme.getSize("wide_margin").height
+        anchors.bottom: selectDifferentProjectButton.top
+        anchors.bottomMargin: UM.Theme.getSize("default_margin").width
+
+        color: UM.Theme.getColor("main_background")
+        border.width: UM.Theme.getSize("default_lining").width
+        border.color: UM.Theme.getColor("lining")
+
+
+        Cura.TableView
+        {
+            id: filesTableView
+            anchors.fill: parent
+            model: manager.digitalFactoryFileModel
+            visible: model.count != 0 && manager.retrievingFileStatus != DF.RetrievalStatus.InProgress
+            selectionMode: OldControls.SelectionMode.NoSelection
+
+            OldControls.TableViewColumn
+            {
+                id: fileNameColumn
+                role: "fileName"
+                title: "@tableViewColumn:title", "Name"
+                width: Math.round(filesTableView.width / 3)
+            }
+
+            OldControls.TableViewColumn
+            {
+                id: usernameColumn
+                role: "username"
+                title: "Uploaded by"
+                width: Math.round(filesTableView.width / 3)
+            }
+
+            OldControls.TableViewColumn
+            {
+                role: "uploadedAt"
+                title: "Uploaded at"
+            }
+        }
+
+        Label
+        {
+            id: emptyProjectLabel
+            anchors.horizontalCenter: parent.horizontalCenter
+            anchors.verticalCenter: parent.verticalCenter
+            text: "Select a project to view its files."
+            font: UM.Theme.getFont("default")
+            color: UM.Theme.getColor("setting_category_text")
+
+            Connections
+            {
+                target: manager
+                function onSelectedProjectIndexChanged()
+                {
+                    emptyProjectLabel.visible = (manager.newProjectIndex == -1)
+                }
+            }
+        }
+
+        Label
+        {
+            id: noFilesInProjectLabel
+            anchors.horizontalCenter: parent.horizontalCenter
+            anchors.verticalCenter: parent.verticalCenter
+            visible: (manager.digitalFactoryFileModel.count == 0 && !emptyProjectLabel.visible && !retrievingFilesBusyIndicator.visible)
+            text: "No supported files in this project."
+            font: UM.Theme.getFont("default")
+            color: UM.Theme.getColor("setting_category_text")
+        }
+
+        BusyIndicator
+        {
+            // Shows up while Cura is waiting to receive the files of a project from the digital factory library
+            id: retrievingFilesBusyIndicator
+
+            anchors
+            {
+                verticalCenter: parent.verticalCenter
+                horizontalCenter: parent.horizontalCenter
+            }
+
+            width: parent.width / 4
+            height: width
+            visible: manager.retrievingFilesStatus == DF.RetrievalStatus.InProgress
+            running: visible
+            palette.dark: UM.Theme.getColor("text")
+        }
+
+        Connections
+        {
+            target: manager.digitalFactoryFileModel
+
+            function onItemsChanged()
+            {
+                // Make sure no files are selected when the file model changes
+                filesTableView.currentRow = -1
+                filesTableView.selection.clear()
+            }
+        }
+    }
+    Cura.SecondaryButton
+    {
+        id: selectDifferentProjectButton
+
+        anchors.bottom: parent.bottom
+        anchors.left: parent.left
+        text: "Change Library project"
+
+        onClicked:
+        {
+            manager.selectedProjectIndex = -1
+        }
+        busy: false
+    }
+
+    Cura.PrimaryButton
+    {
+        id: saveButton
+
+        anchors.bottom: parent.bottom
+        anchors.right: parent.right
+        text: "Save"
+        enabled: (asProjectCheckbox.checked || asSlicedCheckbox.checked) && dfFilenameTextfield.text.length >= 1
+
+        onClicked:
+        {
+            let saveAsFormats = [];
+            if (asProjectCheckbox.checked)
+            {
+                saveAsFormats.push("3mf");
+            }
+            if (asSlicedCheckbox.checked)
+            {
+                saveAsFormats.push("ufp");
+            }
+            manager.saveFileToSelectedProject(dfFilenameTextfield.text, saveAsFormats);
+        }
+        busy: false
+    }
+
+    Row
+    {
+
+        id: saveAsFormatRow
+        anchors.verticalCenter: saveButton.verticalCenter
+        anchors.right: saveButton.left
+        anchors.rightMargin: UM.Theme.getSize("thin_margin").height
+        width: childrenRect.width
+        spacing: UM.Theme.getSize("default_margin").width
+
+        Cura.CheckBox
+        {
+            id: asProjectCheckbox
+            height: UM.Theme.getSize("checkbox").height
+            anchors.verticalCenter: parent.verticalCenter
+            checked: true
+            text: "Save Cura project"
+            font: UM.Theme.getFont("medium")
+        }
+
+        Cura.CheckBox
+        {
+            id: asSlicedCheckbox
+            height: UM.Theme.getSize("checkbox").height
+            anchors.verticalCenter: parent.verticalCenter
+
+            enabled: UM.Backend.state == UM.Backend.Done
+            checked: UM.Backend.state == UM.Backend.Done
+            text: "Save print file"
+            font: UM.Theme.getFont("medium")
+        }
+    }
+
+    Component.onCompleted:
+    {
+        saveButton.clicked.connect(base.savePressed)
+        selectDifferentProjectButton.clicked.connect(base.selectDifferentProjectPressed)
+    }
+}

plugins/DigitalLibrary/resources/qml/SelectProjectPage.qml

@@ -0,0 +1,231 @@
+// Copyright (C) 2021 Ultimaker B.V.
+// Cura is released under the terms of the LGPLv3 or higher.
+
+import QtQuick 2.10
+import QtQuick.Window 2.2
+import QtQuick.Controls 1.4 as OldControls // TableView doesn't exist in the QtQuick Controls 2.x in 5.10, so use the old one
+import QtQuick.Controls 2.3
+import QtQuick.Controls.Styles 1.4
+import QtQuick.Layouts 1.1
+
+import UM 1.2 as UM
+import Cura 1.6 as Cura
+
+import DigitalFactory 1.0 as DF
+
+
+Item
+{
+    id: base
+
+    width: parent.width
+    height: parent.height
+    property bool createNewProjectButtonVisible: true
+
+    anchors
+    {
+        top: parent.top
+        bottom: parent.bottom
+        left: parent.left
+        right: parent.right
+        margins: UM.Theme.getSize("default_margin").width
+    }
+
+    RowLayout
+    {
+        id: headerRow
+
+        anchors
+        {
+            top: parent.top
+            left: parent.left
+            right: parent.right
+        }
+        height: childrenRect.height
+        spacing: UM.Theme.getSize("default_margin").width
+
+        Cura.TextField
+        {
+            id: searchBar
+            Layout.fillWidth: true
+            implicitHeight: createNewProjectButton.height
+
+            onTextEdited: manager.projectFilter = text //Update the search filter when editing this text field.
+
+            leftIcon: UM.Theme.getIcon("Magnifier")
+            placeholderText: "Search"
+        }
+
+        Cura.SecondaryButton
+        {
+            id: createNewProjectButton
+
+            text: "New Library project"
+            visible: createNewProjectButtonVisible && manager.userAccountCanCreateNewLibraryProject && (manager.retrievingProjectsStatus == DF.RetrievalStatus.Success || manager.retrievingProjectsStatus == DF.RetrievalStatus.Failed)
+
+            onClicked:
+            {
+                createNewProjectPopup.open()
+            }
+            busy: manager.creatingNewProjectStatus == DF.RetrievalStatus.InProgress
+        }
+
+
+        Cura.SecondaryButton
+        {
+            id: upgradePlanButton
+
+            text: "Upgrade plan"
+            iconSource: UM.Theme.getIcon("LinkExternal")
+            visible: createNewProjectButtonVisible && !manager.userAccountCanCreateNewLibraryProject && (manager.retrievingProjectsStatus == DF.RetrievalStatus.Success || manager.retrievingProjectsStatus == DF.RetrievalStatus.Failed)
+            tooltip: "You have reached the maximum number of projects allowed by your subscription. Please upgrade to the Professional subscription to create more projects."
+            tooltipWidth: parent.width * 0.5
+
+            onClicked: Qt.openUrlExternally("https://ultimaker.com/software/ultimaker-essentials/sign-up-cura?utm_source=cura&utm_medium=software&utm_campaign=lib-max")
+        }
+    }
+
+    Item
+    {
+        id: noLibraryProjectsContainer
+        anchors
+        {
+            top: parent.top
+            bottom: parent.bottom
+            left: parent.left
+            right: parent.right
+        }
+        visible: manager.digitalFactoryProjectModel.count == 0 && (manager.retrievingProjectsStatus == DF.RetrievalStatus.Success || manager.retrievingProjectsStatus == DF.RetrievalStatus.Failed)
+
+        Column
+        {
+            anchors.centerIn: parent
+            spacing: UM.Theme.getSize("thin_margin").height
+            Image
+            {
+                id: digitalFactoryImage
+                anchors.horizontalCenter: parent.horizontalCenter
+                source: searchBar.text === "" ? "../images/digital_factory.svg" : "../images/projects_not_found.svg"
+                fillMode: Image.PreserveAspectFit
+                width: parent.width - 2 * UM.Theme.getSize("thick_margin").width
+            }
+
+            Label
+            {
+                id: noLibraryProjectsLabel
+                anchors.horizontalCenter: parent.horizontalCenter
+                text: searchBar.text === "" ? "It appears that you don't have any projects in the Library yet." : "No projects found that match the search query."
+                font: UM.Theme.getFont("medium")
+                color: UM.Theme.getColor("text")
+            }
+
+            Cura.TertiaryButton
+            {
+                id: visitDigitalLibraryButton
+                anchors.horizontalCenter: parent.horizontalCenter
+                text: "Visit Digital Library"
+                onClicked:  Qt.openUrlExternally(CuraApplication.ultimakerDigitalFactoryUrl + "/app/library")
+                visible: searchBar.text === "" //Show the link to Digital Library when there are no projects in the user's Library.
+            }
+        }
+    }
+
+    Item
+    {
+        id: projectListContainer
+        anchors
+        {
+            top: headerRow.bottom
+            topMargin: UM.Theme.getSize("default_margin").height
+            bottom: parent.bottom
+            left: parent.left
+            right: parent.right
+        }
+        visible: manager.digitalFactoryProjectModel.count > 0
+
+        // Use a flickable and a column with a repeater instead of a ListView in a ScrollView, because the ScrollView cannot
+        // have additional children (aside from the view inside it), which wouldn't allow us to add the LoadMoreProjectsCard
+        // in it.
+        Flickable
+        {
+            id: flickableView
+            clip: true
+            contentWidth: parent.width
+            contentHeight: projectsListView.implicitHeight
+            anchors.fill: parent
+
+            ScrollBar.vertical: ScrollBar
+            {
+                // Vertical ScrollBar, styled similarly to the scrollBar in the settings panel
+                id: verticalScrollBar
+                visible: flickableView.contentHeight > flickableView.height
+
+                background: Rectangle
+                {
+                    implicitWidth: UM.Theme.getSize("scrollbar").width
+                    radius: Math.round(implicitWidth / 2)
+                    color: UM.Theme.getColor("scrollbar_background")
+                }
+
+                contentItem: Rectangle
+                {
+                    id: scrollViewHandle
+                    implicitWidth: UM.Theme.getSize("scrollbar").width
+                    radius: Math.round(implicitWidth / 2)
+
+                    color: verticalScrollBar.pressed ? UM.Theme.getColor("scrollbar_handle_down") : verticalScrollBar.hovered ? UM.Theme.getColor("scrollbar_handle_hover") : UM.Theme.getColor("scrollbar_handle")
+                    Behavior on color { ColorAnimation { duration: 50; } }
+                }
+            }
+
+            Column
+            {
+                id: projectsListView
+                width: verticalScrollBar.visible ? parent.width - verticalScrollBar.width - UM.Theme.getSize("default_margin").width : parent.width
+                anchors.top: parent.top
+                spacing: UM.Theme.getSize("narrow_margin").width
+
+                Repeater
+                {
+                    model: manager.digitalFactoryProjectModel
+                    delegate: ProjectSummaryCard
+                    {
+                        id: projectSummaryCard
+                        imageSource: model.thumbnailUrl || "../images/placeholder.svg"
+                        projectNameText: model.displayName
+                        projectUsernameText: model.username
+                        projectLastUpdatedText: "Last updated: " + model.lastUpdated
+
+                        onClicked:
+                        {
+                            manager.selectedProjectIndex = index
+                        }
+                    }
+                }
+
+                LoadMoreProjectsCard
+                {
+                    id: loadMoreProjectsCard
+                    height: UM.Theme.getSize("toolbox_thumbnail_small").height
+                    width: parent.width
+                    visible: manager.digitalFactoryProjectModel.count > 0
+                    hasMoreProjectsToLoad: manager.hasMoreProjectsToLoad
+
+                    onClicked:
+                    {
+                        manager.loadMoreProjects()
+                    }
+                }
+            }
+        }
+    }
+
+    CreateNewProjectPopup
+    {
+        id: createNewProjectPopup
+        width: 400 * screenScaleFactor
+        height: 220 * screenScaleFactor
+        x: Math.round((parent.width - width) / 2)
+        y: Math.round((parent.height - height) / 2)
+    }
+}

plugins/DigitalLibrary/src/BaseModel.py

@@ -0,0 +1,74 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from datetime import datetime, timezone
+from typing import TypeVar, Dict, List, Any, Type, Union
+
+
+# Type variable used in the parse methods below, which should be a subclass of BaseModel.
+T = TypeVar("T", bound="BaseModel")
+
+
+class BaseModel:
+
+    def __init__(self, **kwargs) -> None:
+        self.__dict__.update(kwargs)
+        self.validate()
+
+    # Validates the model, raising an exception if the model is invalid.
+    def validate(self) -> None:
+        pass
+
+    def __eq__(self, other):
+        """Checks whether the two models are equal.
+
+        :param other: The other model.
+        :return: True if they are equal, False if they are different.
+        """
+        return type(self) == type(other) and self.toDict() == other.toDict()
+
+    def __ne__(self, other) -> bool:
+        """Checks whether the two models are different.
+
+        :param other: The other model.
+        :return: True if they are different, False if they are the same.
+        """
+        return type(self) != type(other) or self.toDict() != other.toDict()
+
+    def toDict(self) -> Dict[str, Any]:
+        """Converts the model into a serializable dictionary"""
+
+        return self.__dict__
+
+    @staticmethod
+    def parseModel(model_class: Type[T], values: Union[T, Dict[str, Any]]) -> T:
+        """Parses a single model.
+
+        :param model_class: The model class.
+        :param values: The value of the model, which is usually a dictionary, but may also be already parsed.
+        :return: An instance of the model_class given.
+        """
+        if isinstance(values, dict):
+            return model_class(**values)
+        return values
+
+    @classmethod
+    def parseModels(cls, model_class: Type[T], values: List[Union[T, Dict[str, Any]]]) -> List[T]:
+        """Parses a list of models.
+
+        :param model_class: The model class.
+        :param values: The value of the list. Each value is usually a dictionary, but may also be already parsed.
+        :return: A list of instances of the model_class given.
+        """
+        return [cls.parseModel(model_class, value) for value in values]
+
+    @staticmethod
+    def parseDate(date: Union[str, datetime]) -> datetime:
+        """Parses the given date string.
+
+        :param date: The date to parse.
+        :return: The parsed date.
+        """
+        if isinstance(date, datetime):
+            return date
+        return datetime.strptime(date, "%Y-%m-%dT%H:%M:%S.%fZ").replace(tzinfo=timezone.utc)

plugins/DigitalLibrary/src/CloudError.py

@@ -0,0 +1,31 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+from typing import Dict, Optional, Any
+
+from .BaseModel import BaseModel
+
+
+class CloudError(BaseModel):
+    """Class representing errors generated by the servers, according to the JSON-API standard."""
+
+    def __init__(self, id: str, code: str, title: str, http_status: str, detail: Optional[str] = None,
+                 meta: Optional[Dict[str, Any]] = None, **kwargs) -> None:
+        """Creates a new error object.
+
+        :param id: Unique identifier for this particular occurrence of the problem.
+        :param title: A short, human-readable summary of the problem that SHOULD NOT change from occurrence to occurrence
+          of the problem, except for purposes of localization.
+        :param code: An application-specific error code, expressed as a string value.
+        :param detail: A human-readable explanation specific to this occurrence of the problem. Like title, this field's
+          value can be localized.
+        :param http_status: The HTTP status code applicable to this problem, converted to string.
+        :param meta: Non-standard meta-information about the error, depending on the error code.
+        """
+
+        self.id = id
+        self.code = code
+        self.http_status = http_status
+        self.title = title
+        self.detail = detail
+        self.meta = meta
+        super().__init__(**kwargs)

plugins/DigitalLibrary/src/DFFileExportAndUploadManager.py

@@ -0,0 +1,373 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+import json
+import threading
+from json import JSONDecodeError
+from typing import List, Dict, Any, Callable, Union, Optional
+
+from PyQt5.QtCore import QUrl
+from PyQt5.QtGui import QDesktopServices
+from PyQt5.QtNetwork import QNetworkReply
+
+from UM.FileHandler.FileHandler import FileHandler
+from UM.Logger import Logger
+from UM.Message import Message
+from UM.Scene.SceneNode import SceneNode
+from cura.CuraApplication import CuraApplication
+from .DFLibraryFileUploadRequest import DFLibraryFileUploadRequest
+from .DFLibraryFileUploadResponse import DFLibraryFileUploadResponse
+from .DFPrintJobUploadRequest import DFPrintJobUploadRequest
+from .DFPrintJobUploadResponse import DFPrintJobUploadResponse
+from .DigitalFactoryApiClient import DigitalFactoryApiClient
+from .ExportFileJob import ExportFileJob
+
+
+class DFFileExportAndUploadManager:
+    """
+    Class responsible for exporting the scene and uploading the exported data to the Digital Factory Library. Since 3mf
+    and UFP files may need to be uploaded at the same time, this class keeps a single progress and success message for
+    both files and updates those messages according to the progress of both the file job uploads.
+    """
+    def __init__(self, file_handlers: Dict[str, FileHandler],
+                 nodes: List[SceneNode],
+                 library_project_id: str,
+                 library_project_name: str,
+                 file_name: str,
+                 formats: List[str],
+                 on_upload_error: Callable[[], Any],
+                 on_upload_success: Callable[[], Any],
+                 on_upload_finished: Callable[[], Any] ,
+                 on_upload_progress: Callable[[int], Any]) -> None:
+
+        self._file_handlers = file_handlers  # type: Dict[str, FileHandler]
+        self._nodes = nodes  # type: List[SceneNode]
+        self._library_project_id = library_project_id  # type: str
+        self._library_project_name = library_project_name  # type: str
+        self._file_name = file_name  # type: str
+        self._upload_jobs = []  # type: List[ExportFileJob]
+        self._formats = formats  # type: List[str]
+        self._api = DigitalFactoryApiClient(application = CuraApplication.getInstance(), on_error = lambda error: Logger.log("e", str(error)))
+
+        # Functions of the parent class that should be called based on the upload process output
+        self._on_upload_error = on_upload_error
+        self._on_upload_success = on_upload_success
+        self._on_upload_finished = on_upload_finished
+        self._on_upload_progress = on_upload_progress
+
+        # Lock used for updating the progress message (since the progress is changed by two parallel upload jobs) or
+        # show the success message (once both upload jobs are done)
+        self._message_lock = threading.Lock()
+
+        self._file_upload_job_metadata = self.initializeFileUploadJobMetadata()  # type: Dict[str, Dict[str, Any]]
+
+        self.progress_message = Message(
+                title = "Uploading...",
+                text = "Uploading files to '{}'".format(self._library_project_name),
+                progress = -1,
+                lifetime = 0,
+                dismissable = False,
+                use_inactivity_timer = False
+        )
+
+        self._generic_success_message = Message(
+                text = "Your {} uploaded to '{}'.".format("file was" if len(self._file_upload_job_metadata) <= 1 else "files were", self._library_project_name),
+                title = "Upload successful",
+                lifetime = 0,
+        )
+        self._generic_success_message.addAction(
+                "open_df_project",
+                "Open project",
+                "open-folder", "Open the project containing the file in Digital Library"
+        )
+        self._generic_success_message.actionTriggered.connect(self._onMessageActionTriggered)
+
+
+
+    def _onCuraProjectFileExported(self, job: ExportFileJob) -> None:
+        """Handler for when the DF Library workspace file (3MF) has been created locally.
+
+        It can now be sent over the Digital Factory API.
+        """
+        if not job.getOutput():
+            self._onJobExportError(job.getFileName())
+            return
+        self._file_upload_job_metadata[job.getFileName()]["export_job_output"] = job.getOutput()
+        request = DFLibraryFileUploadRequest(
+                content_type = job.getMimeType(),
+                file_name = job.getFileName(),
+                file_size = len(job.getOutput()),
+                library_project_id = self._library_project_id
+        )
+        self._api.requestUpload3MF(request, on_finished = self._uploadFileData, on_error = self._onRequestUploadCuraProjectFileFailed)
+
+    def _onPrintFileExported(self, job: ExportFileJob) -> None:
+        """Handler for when the DF Library print job file (UFP) has been created locally.
+
+        It can now be sent over the Digital Factory API.
+        """
+        if not job.getOutput():
+            self._onJobExportError(job.getFileName())
+            return
+        self._file_upload_job_metadata[job.getFileName()]["export_job_output"] = job.getOutput()
+        request = DFPrintJobUploadRequest(
+                content_type = job.getMimeType(),
+                job_name = job.getFileName(),
+                file_size = len(job.getOutput()),
+                library_project_id = self._library_project_id
+        )
+        self._api.requestUploadUFP(request, on_finished = self._uploadFileData, on_error = self._onRequestUploadPrintFileFailed)
+
+    def _uploadFileData(self, file_upload_response: Union[DFLibraryFileUploadResponse, DFPrintJobUploadResponse]) -> None:
+        """Uploads the exported file data after the file or print job upload has been registered at the Digital Factory
+        Library API.
+
+        :param file_upload_response: The response received from the Digital Factory Library API.
+        """
+        if isinstance(file_upload_response, DFLibraryFileUploadResponse):
+            file_name = file_upload_response.file_name
+        elif isinstance(file_upload_response, DFPrintJobUploadResponse):
+            file_name = file_upload_response.job_name if file_upload_response.job_name is not None else ""
+        else:
+            Logger.log("e", "Wrong response type received. Aborting uploading file to the Digital Library")
+            return
+        with self._message_lock:
+            self.progress_message.show()
+        self._file_upload_job_metadata[file_name]["file_upload_response"] = file_upload_response
+        job_output = self._file_upload_job_metadata[file_name]["export_job_output"]
+
+        with self._message_lock:
+            self._file_upload_job_metadata[file_name]["upload_status"] = "uploading"
+
+        self._api.uploadExportedFileData(file_upload_response,
+                                         job_output,
+                                         on_finished = self._onFileUploadFinished,
+                                         on_success = self._onUploadSuccess,
+                                         on_progress = self._onUploadProgress,
+                                         on_error = self._onUploadError)
+
+    def _onUploadProgress(self, filename: str, progress: int) -> None:
+        """
+        Updates the progress message according to the total progress of the two files and displays it to the user. It is
+        made thread-safe with a lock, since the progress can be updated by two separate upload jobs
+
+        :param filename: The name of the file for which we have progress (including the extension).
+        :param progress: The progress percentage
+        """
+        with self._message_lock:
+            self._file_upload_job_metadata[filename]["upload_progress"] = progress
+            self._file_upload_job_metadata[filename]["upload_status"] = "uploading"
+            total_progress = self.getTotalProgress()
+            self.progress_message.setProgress(total_progress)
+            self.progress_message.show()
+        self._on_upload_progress(progress)
+
+    def _onUploadSuccess(self, filename: str) -> None:
+        """
+        Sets the upload status to success and the progress of the file with the given filename to 100%. This function is
+        should be called only if the file has uploaded all of its data successfully (i.e. no error occurred during the
+        upload process).
+
+        :param filename: The name of the file that was uploaded successfully (including the extension).
+        """
+        with self._message_lock:
+            self._file_upload_job_metadata[filename]["upload_status"] = "success"
+            self._file_upload_job_metadata[filename]["upload_progress"] = 100
+        self._on_upload_success()
+
+    def _onFileUploadFinished(self, filename: str) -> None:
+        """
+        Callback that makes sure the correct messages are displayed according to the statuses of the individual jobs.
+
+        This function is called whenever an upload job has finished, regardless if it had errors or was successful.
+        Both jobs have to have finished for the messages to show.
+
+        :param filename: The name of the file that has finished uploading (including the extension).
+        """
+        with self._message_lock:
+
+            # All files have finished their uploading process
+            if all([(file_upload_job["upload_progress"] == 100 and file_upload_job["upload_status"] != "uploading") for file_upload_job in self._file_upload_job_metadata.values()]):
+
+                # Reset and hide the progress message
+                self.progress_message.setProgress(-1)
+                self.progress_message.hide()
+
+                # All files were successfully uploaded.
+                if all([(file_upload_job["upload_status"] == "success") for file_upload_job in self._file_upload_job_metadata.values()]):
+                    # Show a single generic success message for all files
+                    self._generic_success_message.show()
+                else:  # One or more files failed to upload.
+                    # Show individual messages for each file, according to their statuses
+                    for filename, upload_job_metadata in self._file_upload_job_metadata.items():
+                        if upload_job_metadata["upload_status"] == "success":
+                            upload_job_metadata["file_upload_success_message"].show()
+                        else:
+                            upload_job_metadata["file_upload_failed_message"].show()
+
+                # Call the parent's finished function
+                self._on_upload_finished()
+
+    def _onJobExportError(self, filename: str) -> None:
+        """
+        Displays an appropriate message when the process to export a file fails.
+
+        :param filename: The name of the file that failed to be exported (including the extension).
+        """
+        Logger.log("d", "Error while exporting file '{}'".format(filename))
+        with self._message_lock:
+            # Set the progress to 100% when the upload job fails, to avoid having the progress message stuck
+            self._file_upload_job_metadata[filename]["upload_status"] = "failed"
+            self._file_upload_job_metadata[filename]["upload_progress"] = 100
+            self._file_upload_job_metadata[filename]["file_upload_failed_message"] = Message(
+                    text = "Failed to export the file '{}'. The upload process is aborted.".format(filename),
+                    title = "Export error",
+                    lifetime = 0
+            )
+        self._on_upload_error()
+        self._onFileUploadFinished(filename)
+
+    def _onRequestUploadCuraProjectFileFailed(self, reply: "QNetworkReply", network_error: "QNetworkReply.NetworkError") -> None:
+        """
+        Displays an appropriate message when the request to upload the Cura project file (.3mf) to the Digital Library fails.
+        This means that something went wrong with the initial request to create a "file" entry in the digital library.
+        """
+        reply_string = bytes(reply.readAll()).decode()
+        filename_3mf = self._file_name + ".3mf"
+        Logger.log("d", "An error occurred while uploading the Cura project file '{}' to the Digital Library project '{}': {}".format(filename_3mf, self._library_project_id, reply_string))
+        with self._message_lock:
+            # Set the progress to 100% when the upload job fails, to avoid having the progress message stuck
+            self._file_upload_job_metadata[filename_3mf]["upload_status"] = "failed"
+            self._file_upload_job_metadata[filename_3mf]["upload_progress"] = 100
+
+            human_readable_error = self.extractErrorTitle(reply_string)
+            self._file_upload_job_metadata[filename_3mf]["file_upload_failed_message"] = Message(
+                    text = "Failed to upload the file '{}' to '{}'. {}".format(filename_3mf, self._library_project_name, human_readable_error),
+                    title = "File upload error",
+                    lifetime = 0
+            )
+        self._on_upload_error()
+        self._onFileUploadFinished(filename_3mf)
+
+    def _onRequestUploadPrintFileFailed(self, reply: "QNetworkReply", network_error: "QNetworkReply.NetworkError") -> None:
+        """
+        Displays an appropriate message when the request to upload the print file (.ufp) to the Digital Library fails.
+        This means that something went wrong with the initial request to create a "file" entry in the digital library.
+        """
+        reply_string = bytes(reply.readAll()).decode()
+        filename_ufp = self._file_name + ".ufp"
+        Logger.log("d", "An error occurred while uploading the print job file '{}' to the Digital Library project '{}': {}".format(filename_ufp, self._library_project_id, reply_string))
+        with self._message_lock:
+            # Set the progress to 100% when the upload job fails, to avoid having the progress message stuck
+            self._file_upload_job_metadata[filename_ufp]["upload_status"] = "failed"
+            self._file_upload_job_metadata[filename_ufp]["upload_progress"] = 100
+
+            human_readable_error = self.extractErrorTitle(reply_string)
+            self._file_upload_job_metadata[filename_ufp]["file_upload_failed_message"] = Message(
+                    title = "File upload error",
+                    text = "Failed to upload the file '{}' to '{}'. {}".format(filename_ufp, self._library_project_name, human_readable_error),
+                    lifetime = 0
+            )
+        self._on_upload_error()
+        self._onFileUploadFinished(filename_ufp)
+
+    @staticmethod
+    def extractErrorTitle(reply_body: Optional[str]) -> str:
+        error_title = ""
+        if reply_body:
+            try:
+                reply_dict = json.loads(reply_body)
+            except JSONDecodeError:
+                Logger.logException("w", "Unable to extract title from reply body")
+                return error_title
+            if "errors" in reply_dict and len(reply_dict["errors"]) >= 1 and "title" in reply_dict["errors"][0]:
+                error_title = reply_dict["errors"][0]["title"]
+        return error_title
+
+    def _onUploadError(self, filename: str, reply: "QNetworkReply", error: "QNetworkReply.NetworkError") -> None:
+        """
+        Displays the given message if uploading the mesh has failed due to a generic error (i.e. lost connection).
+        If one of the two files fail, this error function will set its progress as finished, to make sure that the
+        progress message doesn't get stuck.
+
+        :param filename: The name of the file that failed to upload (including the extension).
+        """
+        reply_string = bytes(reply.readAll()).decode()
+        Logger.log("d", "Error while uploading '{}' to the Digital Library project '{}'. Reply: {}".format(filename, self._library_project_id, reply_string))
+        with self._message_lock:
+            # Set the progress to 100% when the upload job fails, to avoid having the progress message stuck
+            self._file_upload_job_metadata[filename]["upload_status"] = "failed"
+            self._file_upload_job_metadata[filename]["upload_progress"] = 100
+            human_readable_error = self.extractErrorTitle(reply_string)
+            self._file_upload_job_metadata[filename]["file_upload_failed_message"] = Message(
+                    title = "File upload error",
+                    text = "Failed to upload the file '{}' to '{}'. {}".format(self._file_name, self._library_project_name, human_readable_error),
+                    lifetime = 0
+            )
+
+        self._on_upload_error()
+
+    def getTotalProgress(self) -> int:
+        """
+        Returns the total upload progress of all the upload jobs
+
+        :return: The average progress percentage
+        """
+        return int(sum([file_upload_job["upload_progress"] for file_upload_job in self._file_upload_job_metadata.values()]) / len(self._file_upload_job_metadata.values()))
+
+    def _onMessageActionTriggered(self, message, action):
+        if action == "open_df_project":
+            project_url = "{}/app/library/project/{}?wait_for_new_files=true".format(CuraApplication.getInstance().ultimakerDigitalFactoryUrl, self._library_project_id)
+            QDesktopServices.openUrl(QUrl(project_url))
+            message.hide()
+
+    def start(self) -> None:
+        for job in self._upload_jobs:
+            job.start()
+
+    def initializeFileUploadJobMetadata(self) -> Dict[str, Any]:
+        metadata = {}
+        self._upload_jobs = []
+        if "3mf" in self._formats and "3mf" in self._file_handlers and self._file_handlers["3mf"]:
+            filename_3mf = self._file_name + ".3mf"
+            metadata[filename_3mf] = {
+                "export_job_output"   : None,
+                "upload_progress"     : -1,
+                "upload_status"       : "",
+                "file_upload_response": None,
+                "file_upload_success_message": Message(
+                    text = "'{}' was uploaded to '{}'.".format(filename_3mf, self._library_project_name),
+                    title = "Upload successful",
+                    lifetime = 0,
+                ),
+                "file_upload_failed_message": Message(
+                    text = "Failed to upload the file '{}' to '{}'.".format(filename_3mf, self._library_project_name),
+                    title = "File upload error",
+                    lifetime = 0
+                )
+            }
+            job_3mf = ExportFileJob(self._file_handlers["3mf"], self._nodes, self._file_name, "3mf")
+            job_3mf.finished.connect(self._onCuraProjectFileExported)
+            self._upload_jobs.append(job_3mf)
+
+        if "ufp" in self._formats and "ufp" in self._file_handlers and self._file_handlers["ufp"]:
+            filename_ufp = self._file_name + ".ufp"
+            metadata[filename_ufp] = {
+                "export_job_output"   : None,
+                "upload_progress"     : -1,
+                "upload_status"       : "",
+                "file_upload_response": None,
+                "file_upload_success_message": Message(
+                    text = "'{}' was uploaded to '{}'.".format(filename_ufp, self._library_project_name),
+                    title = "Upload successful",
+                    lifetime = 0,
+                ),
+                "file_upload_failed_message": Message(
+                    text = "Failed to upload the file '{}' to '{}'.".format(filename_ufp, self._library_project_name),
+                    title = "File upload error",
+                    lifetime = 0
+                )
+            }
+            job_ufp = ExportFileJob(self._file_handlers["ufp"], self._nodes, self._file_name, "ufp")
+            job_ufp.finished.connect(self._onPrintFileExported)
+            self._upload_jobs.append(job_ufp)
+        return metadata

plugins/DigitalLibrary/src/DFFileUploader.py

@@ -0,0 +1,149 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from PyQt5.QtNetwork import QNetworkRequest, QNetworkReply
+from typing import Callable, Any, cast, Optional, Union
+
+from UM.Logger import Logger
+from UM.TaskManagement.HttpRequestManager import HttpRequestManager
+from .DFLibraryFileUploadResponse import DFLibraryFileUploadResponse
+from .DFPrintJobUploadResponse import DFPrintJobUploadResponse
+
+
+class DFFileUploader:
+    """Class responsible for uploading meshes to the the digital factory library in separate requests."""
+
+    # The maximum amount of times to retry if the server returns one of the RETRY_HTTP_CODES
+    MAX_RETRIES = 10
+
+    # The HTTP codes that should trigger a retry.
+    RETRY_HTTP_CODES = {500, 502, 503, 504}
+
+    def __init__(self,
+                 http: HttpRequestManager,
+                 df_file: Union[DFLibraryFileUploadResponse, DFPrintJobUploadResponse],
+                 data: bytes,
+                 on_finished: Callable[[str], Any],
+                 on_success: Callable[[str], Any],
+                 on_progress: Callable[[str, int], Any],
+                 on_error: Callable[[str, "QNetworkReply", "QNetworkReply.NetworkError"], Any]
+                 ) -> None:
+        """Creates a mesh upload object.
+
+        :param http: The network access manager that will handle the HTTP requests.
+        :param df_file: The file response that was received by the Digital Factory after registering the upload.
+        :param data: The mesh bytes to be uploaded.
+        :param on_finished: The method to be called when done.
+        :param on_success: The method to be called when the upload is successful.
+        :param on_progress: The method to be called when the progress changes (receives a percentage 0-100).
+        :param on_error: The method to be called when an error occurs.
+        """
+
+        self._http = http  # type: HttpRequestManager
+        self._df_file = df_file  # type: Union[DFLibraryFileUploadResponse, DFPrintJobUploadResponse]
+        self._file_name = ""
+        if isinstance(self._df_file, DFLibraryFileUploadResponse):
+            self._file_name = self._df_file.file_name
+        elif isinstance(self._df_file, DFPrintJobUploadResponse):
+            if self._df_file.job_name is not None:
+                self._file_name = self._df_file.job_name
+            else:
+                self._file_name = ""
+        else:
+            raise TypeError("Incorrect input type")
+        self._data = data  # type: bytes
+
+        self._on_finished = on_finished
+        self._on_success = on_success
+        self._on_progress = on_progress
+        self._on_error = on_error
+
+        self._retries = 0
+        self._finished = False
+
+    def start(self) -> None:
+        """Starts uploading the mesh."""
+
+        if self._finished:
+            # reset state.
+            self._retries = 0
+            self._finished = False
+        self._upload()
+
+    def stop(self):
+        """Stops uploading the mesh, marking it as finished."""
+
+        Logger.log("i", "Finished uploading")
+        self._finished = True  # Signal to any ongoing retries that we should stop retrying.
+        self._on_finished(self._file_name)
+
+    def _upload(self) -> None:
+        """
+        Uploads the file to the Digital Factory Library project
+        """
+        if self._finished:
+            raise ValueError("The upload is already finished")
+        if isinstance(self._df_file, DFLibraryFileUploadResponse):
+            Logger.log("i", "Uploading Cura project file '{file_name}' via link '{upload_url}'".format(file_name = self._df_file.file_name, upload_url = self._df_file.upload_url))
+        elif isinstance(self._df_file, DFPrintJobUploadResponse):
+            Logger.log("i", "Uploading Cura print file '{file_name}' via link '{upload_url}'".format(file_name = self._df_file.job_name, upload_url = self._df_file.upload_url))
+        self._http.put(
+            url = cast(str, self._df_file.upload_url),
+            headers_dict = {"Content-Type": cast(str, self._df_file.content_type)},
+            data = self._data,
+            callback = self._onUploadFinished,
+            error_callback = self._onUploadError,
+            upload_progress_callback = self._onUploadProgressChanged
+        )
+
+    def _onUploadProgressChanged(self, bytes_sent: int, bytes_total: int) -> None:
+        """Handles an update to the upload progress
+
+        :param bytes_sent: The amount of bytes sent in the current request.
+        :param bytes_total: The amount of bytes to send in the current request.
+        """
+        Logger.debug("Cloud upload progress %s / %s", bytes_sent, bytes_total)
+        if bytes_total:
+            self._on_progress(self._file_name, int(bytes_sent / len(self._data) * 100))
+
+    def _onUploadError(self, reply: QNetworkReply, error: QNetworkReply.NetworkError) -> None:
+        """Handles an error uploading."""
+
+        body = bytes(reply.peek(reply.bytesAvailable())).decode()
+        Logger.log("e", "Received error while uploading: %s", body)
+        self._on_error(self._file_name, reply, error)
+        self.stop()
+
+    def _onUploadFinished(self, reply: QNetworkReply) -> None:
+        """
+        Checks whether a chunk of data was uploaded successfully, starting the next chunk if needed.
+        """
+
+        Logger.log("i", "Finished callback %s %s",
+                   reply.attribute(QNetworkRequest.HttpStatusCodeAttribute), reply.url().toString())
+
+        status_code = reply.attribute(QNetworkRequest.HttpStatusCodeAttribute)  # type: Optional[int]
+        if not status_code:
+            Logger.log("e", "Reply contained no status code.")
+            self._onUploadError(reply, None)
+            return
+
+        # check if we should retry the last chunk
+        if self._retries < self.MAX_RETRIES and status_code in self.RETRY_HTTP_CODES:
+            self._retries += 1
+            Logger.log("i", "Retrying %s/%s request %s", self._retries, self.MAX_RETRIES, reply.url().toString())
+            try:
+                self._upload()
+            except ValueError:  # Asynchronously it could have completed in the meanwhile.
+                pass
+            return
+
+        # Http codes that are not to be retried are assumed to be errors.
+        if status_code > 308:
+            self._onUploadError(reply, None)
+            return
+
+        Logger.log("d", "status_code: %s, Headers: %s, body: %s", status_code,
+                   [bytes(header).decode() for header in reply.rawHeaderList()], bytes(reply.readAll()).decode())
+        self._on_success(self._file_name)
+        self.stop()

plugins/DigitalLibrary/src/DFLibraryFileUploadRequest.py

@@ -0,0 +1,16 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+# Model that represents the request to upload a file to a DF Library project
+from .BaseModel import BaseModel
+
+
+class DFLibraryFileUploadRequest(BaseModel):
+
+    def __init__(self, content_type: str, file_name: str, file_size: int, library_project_id: str, **kwargs) -> None:
+
+        self.content_type = content_type
+        self.file_name = file_name
+        self.file_size = file_size
+        self.library_project_id = library_project_id
+        super().__init__(**kwargs)

plugins/DigitalLibrary/src/DFLibraryFileUploadResponse.py

@@ -0,0 +1,49 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+from datetime import datetime
+from typing import Optional
+
+from .BaseModel import BaseModel
+
+
+class DFLibraryFileUploadResponse(BaseModel):
+    """
+    Model that represents the response received from the Digital Factory after requesting to upload a file in a Library project
+    """
+
+    def __init__(self, client_id: str, content_type: str, file_id: str, file_name: str, library_project_id: str,
+                 status: str, uploaded_at: str, user_id: str, username: str, download_url: Optional[str] = None,
+                 file_size: Optional[int] = None, status_description: Optional[str] = None,
+                 upload_url: Optional[str] = None, **kwargs) -> None:
+
+        """
+        :param client_id: The ID of the OAuth2 client that uploaded this file
+        :param content_type: The content type of the Digital Library project file
+        :param file_id: The ID of the library project file
+        :param file_name: The name of the file
+        :param library_project_id: The ID of the library project, in which the file will be uploaded
+        :param status: The status of the Digital Library project file
+        :param uploaded_at: The time on which the file was uploaded
+        :param user_id: The ID of the user that uploaded this file
+        :param username: The user's unique username
+        :param download_url: A signed URL to download the resulting file. Only available when the job is finished
+        :param file_size: The size of the uploaded file (in bytes)
+        :param status_description: Contains more details about the status, e.g. the cause of failures
+        :param upload_url: The one-time use URL where the file must be uploaded to (only if status is uploading)
+        :param kwargs: Other keyword arguments that may be included in the response
+        """
+
+        self.client_id = client_id  # type: str
+        self.content_type = content_type  # type: str
+        self.file_id = file_id  # type: str
+        self.file_name = file_name  # type: str
+        self.library_project_id = library_project_id  # type: str
+        self.status = status  # type: str
+        self.uploaded_at = self.parseDate(uploaded_at)  # type: datetime
+        self.user_id = user_id  # type: str
+        self.username = username  # type: str
+        self.download_url = download_url  # type: Optional[str]
+        self.file_size = file_size  # type: Optional[int]
+        self.status_description = status_description  # type: Optional[str]
+        self.upload_url = upload_url  # type: Optional[str]
+        super().__init__(**kwargs)

plugins/DigitalLibrary/src/DFPrintJobUploadRequest.py

@@ -0,0 +1,21 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+from .BaseModel import BaseModel
+
+
+# Model that represents the request to upload a print job to the cloud
+class DFPrintJobUploadRequest(BaseModel):
+
+    def __init__(self, job_name: str, file_size: int, content_type: str, library_project_id: str, **kwargs) -> None:
+        """Creates a new print job upload request.
+
+        :param job_name: The name of the print job.
+        :param file_size: The size of the file in bytes.
+        :param content_type: The content type of the print job (e.g. text/plain or application/gzip)
+        """
+
+        self.job_name = job_name
+        self.file_size = file_size
+        self.content_type = content_type
+        self.library_project_id = library_project_id
+        super().__init__(**kwargs)

plugins/DigitalLibrary/src/DFPrintJobUploadResponse.py

@@ -0,0 +1,35 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+from typing import Optional
+
+from .BaseModel import BaseModel
+
+
+# Model that represents the response received from the cloud after requesting to upload a print job
+class DFPrintJobUploadResponse(BaseModel):
+
+    def __init__(self, job_id: str, status: str, download_url: Optional[str] = None, job_name: Optional[str] = None,
+                 upload_url: Optional[str] = None, content_type: Optional[str] = None,
+                 status_description: Optional[str] = None, slicing_details: Optional[dict] = None, **kwargs) -> None:
+        """Creates a new print job response model.
+
+        :param job_id: The job unique ID, e.g. 'kBEeZWEifXbrXviO8mRYLx45P8k5lHVGs43XKvRniPg='.
+        :param status: The status of the print job.
+        :param status_description: Contains more details about the status, e.g. the cause of failures.
+        :param download_url: A signed URL to download the resulting status. Only available when the job is finished.
+        :param job_name: The name of the print job.
+        :param slicing_details: Model for slice information.
+        :param upload_url: The one-time use URL where the toolpath must be uploaded to (only if status is uploading).
+        :param content_type: The content type of the print job (e.g. text/plain or application/gzip)
+        :param generated_time: The datetime when the object was generated on the server-side.
+        """
+
+        self.job_id = job_id
+        self.status = status
+        self.download_url = download_url
+        self.job_name = job_name
+        self.upload_url = upload_url
+        self.content_type = content_type
+        self.status_description = status_description
+        self.slicing_details = slicing_details
+        super().__init__(**kwargs)

plugins/DigitalLibrary/src/DigitalFactoryApiClient.py

@@ -0,0 +1,381 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+import json
+from json import JSONDecodeError
+import re
+from time import time
+from typing import List, Any, Optional, Union, Type, Tuple, Dict, cast, TypeVar, Callable
+
+from PyQt5.QtNetwork import QNetworkReply, QNetworkRequest
+
+from UM.Logger import Logger
+from UM.TaskManagement.HttpRequestManager import HttpRequestManager
+from UM.TaskManagement.HttpRequestScope import JsonDecoratorScope
+from cura.CuraApplication import CuraApplication
+from cura.UltimakerCloud import UltimakerCloudConstants
+from cura.UltimakerCloud.UltimakerCloudScope import UltimakerCloudScope
+from .DFPrintJobUploadResponse import DFPrintJobUploadResponse
+from .BaseModel import BaseModel
+from .CloudError import CloudError
+from .DFFileUploader import DFFileUploader
+from .DFLibraryFileUploadRequest import DFLibraryFileUploadRequest
+from .DFLibraryFileUploadResponse import DFLibraryFileUploadResponse
+from .DFPrintJobUploadRequest import DFPrintJobUploadRequest
+from .DigitalFactoryFeatureBudgetResponse import DigitalFactoryFeatureBudgetResponse
+from .DigitalFactoryFileResponse import DigitalFactoryFileResponse
+from .DigitalFactoryProjectResponse import DigitalFactoryProjectResponse
+from .PaginationLinks import PaginationLinks
+from .PaginationManager import PaginationManager
+
+CloudApiClientModel = TypeVar("CloudApiClientModel", bound=BaseModel)
+"""The generic type variable used to document the methods below."""
+
+
+class DigitalFactoryApiClient:
+    # The URL to access the digital factory.
+    ROOT_PATH = UltimakerCloudConstants.CuraCloudAPIRoot
+    CURA_API_ROOT = "{}/cura/v1".format(ROOT_PATH)
+
+    DEFAULT_REQUEST_TIMEOUT = 10  # seconds
+
+    # In order to avoid garbage collection we keep the callbacks in this list.
+    _anti_gc_callbacks = []  # type: List[Callable[[Any], None]]
+
+    def __init__(self, application: CuraApplication, on_error: Callable[[List[CloudError]], None], projects_limit_per_page: Optional[int] = None) -> None:
+        """Initializes a new digital factory API client.
+
+        :param application:
+        :param on_error: The callback to be called whenever we receive errors from the server.
+        """
+        super().__init__()
+        self._application = application
+        self._account = application.getCuraAPI().account
+        self._scope = JsonDecoratorScope(UltimakerCloudScope(application))
+        self._http = HttpRequestManager.getInstance()
+        self._on_error = on_error
+        self._file_uploader = None  # type: Optional[DFFileUploader]
+        self._library_max_private_projects: Optional[int] = None
+
+        self._projects_pagination_mgr = PaginationManager(limit = projects_limit_per_page) if projects_limit_per_page else None  # type: Optional[PaginationManager]
+
+    def checkUserHasAccess(self, callback: Callable) -> None:
+        """Checks if the user has any sort of access to the digital library.
+           A user is considered to have access if the max-# of private projects is greater then 0 (or -1 for unlimited).
+        """
+
+        def callbackWrap(response: Optional[Any] = None, *args, **kwargs) -> None:
+            if (response is not None and isinstance(response, DigitalFactoryFeatureBudgetResponse) and
+                    response.library_max_private_projects is not None):
+                callback(
+                    response.library_max_private_projects == -1 or  # Note: -1 is unlimited
+                    response.library_max_private_projects > 0)
+                self._library_max_private_projects = response.library_max_private_projects
+            else:
+                Logger.warning(f"Digital Factory: Response is not a feature budget, likely an error: {str(response)}")
+                callback(False)
+
+        self._http.get(f"{self.CURA_API_ROOT}/feature_budgets",
+                       scope = self._scope,
+                       callback = self._parseCallback(callbackWrap, DigitalFactoryFeatureBudgetResponse, callbackWrap),
+                       error_callback = callbackWrap,
+                       timeout = self.DEFAULT_REQUEST_TIMEOUT)
+
+    def checkUserCanCreateNewLibraryProject(self, callback: Callable) -> None:
+        """
+        Checks if the user is allowed to create new library projects.
+        A user is allowed to create new library projects if the haven't reached their maximum allowed private projects.
+        """
+
+        def callbackWrap(response: Optional[Any] = None, *args, **kwargs) -> None:
+            if response is not None:
+                if isinstance(response, DigitalFactoryProjectResponse):  # The user has only one private project
+                    callback(True)
+                elif isinstance(response, list) and all(isinstance(r, DigitalFactoryProjectResponse) for r in response):
+                    callback(len(response) < cast(int, self._library_max_private_projects))
+                else:
+                    Logger.warning(f"Digital Factory: Incorrect response type received when requesting private projects: {str(response)}")
+                    callback(False)
+            else:
+                Logger.warning(f"Digital Factory: Response is empty, likely an error: {str(response)}")
+                callback(False)
+
+        if self._library_max_private_projects is not None and self._library_max_private_projects > 0:
+            # The user has a limit in the number of private projects they can create. Check whether they have already
+            # reached that limit.
+            # Note: Set the pagination manager to None when doing this get request, or else the next/previous links
+            #       of the pagination will become corrupted
+            url = f"{self.CURA_API_ROOT}/projects?shared=false&limit={self._library_max_private_projects}"
+            self._http.get(url,
+                           scope = self._scope,
+                           callback = self._parseCallback(callbackWrap, DigitalFactoryProjectResponse, callbackWrap, pagination_manager = None),
+                           error_callback = callbackWrap,
+                           timeout = self.DEFAULT_REQUEST_TIMEOUT)
+        else:
+            # If the limit is -1, then the user is allowed unlimited projects. If its 0 then they are not allowed to
+            # create any projects
+            callback(self._library_max_private_projects == -1)
+
+    def getProject(self, library_project_id: str, on_finished: Callable[[DigitalFactoryProjectResponse], Any], failed: Callable) -> None:
+        """
+        Retrieves a digital factory project by its library project id.
+
+        :param library_project_id: The id of the library project
+        :param on_finished: The function to be called after the result is parsed.
+        :param failed: The function to be called if the request fails.
+        """
+        url = "{}/projects/{}".format(self.CURA_API_ROOT, library_project_id)
+
+        self._http.get(url,
+                       scope = self._scope,
+                       callback = self._parseCallback(on_finished, DigitalFactoryProjectResponse, failed),
+                       error_callback = failed,
+                       timeout = self.DEFAULT_REQUEST_TIMEOUT)
+
+    def getProjectsFirstPage(self, search_filter: str, on_finished: Callable[[List[DigitalFactoryProjectResponse]], Any], failed: Callable) -> None:
+        """
+        Retrieves digital factory projects for the user that is currently logged in.
+
+        If a projects pagination manager exists, then it attempts to get the first page of the paginated projects list,
+        according to the limit set in the pagination manager. If there is no projects pagination manager, this function
+        leaves the project limit to the default set on the server side (999999).
+
+        :param search_filter: Text to filter the search results. If given an empty string, results are not filtered.
+        :param on_finished: The function to be called after the result is parsed.
+        :param failed: The function to be called if the request fails.
+        """
+        url = f"{self.CURA_API_ROOT}/projects"
+        query_character = "?"
+        if self._projects_pagination_mgr:
+            self._projects_pagination_mgr.reset()  # reset to clear all the links and response metadata
+            url += f"{query_character}limit={self._projects_pagination_mgr.limit}"
+            query_character = "&"
+        if search_filter != "":
+            url += f"{query_character}search={search_filter}"
+
+        self._http.get(url,
+                       scope = self._scope,
+                       callback = self._parseCallback(on_finished, DigitalFactoryProjectResponse, failed, pagination_manager = self._projects_pagination_mgr),
+                       error_callback = failed,
+                       timeout = self.DEFAULT_REQUEST_TIMEOUT)
+
+    def getMoreProjects(self,
+                        on_finished: Callable[[List[DigitalFactoryProjectResponse]], Any],
+                        failed: Callable) -> None:
+        """Retrieves the next page of the paginated projects list from the API, provided that there is any.
+
+        :param on_finished: The function to be called after the result is parsed.
+        :param failed: The function to be called if the request fails.
+        """
+
+        if self.hasMoreProjectsToLoad():
+            url = cast(PaginationLinks, cast(PaginationManager, self._projects_pagination_mgr).links).next_page
+            self._http.get(url,
+                           scope = self._scope,
+                           callback = self._parseCallback(on_finished, DigitalFactoryProjectResponse, failed, pagination_manager = self._projects_pagination_mgr),
+                           error_callback = failed,
+                           timeout = self.DEFAULT_REQUEST_TIMEOUT)
+        else:
+            Logger.log("d", "There are no more projects to load.")
+
+    def hasMoreProjectsToLoad(self) -> bool:
+        """
+        Determines whether the client can get more pages of projects list from the API.
+
+        :return: Whether there are more pages in the projects list available to be retrieved from the API.
+        """
+        return self._projects_pagination_mgr is not None and self._projects_pagination_mgr.links is not None and self._projects_pagination_mgr.links.next_page is not None
+
+    def getListOfFilesInProject(self, library_project_id: str, on_finished: Callable[[List[DigitalFactoryFileResponse]], Any], failed: Callable) -> None:
+        """Retrieves the list of files contained in the project with library_project_id from the Digital Factory Library.
+
+        :param library_project_id: The id of the digital factory library project in which the files are included
+        :param on_finished: The function to be called after the result is parsed.
+        :param failed: The function to be called if the request fails.
+        """
+
+        url = "{}/projects/{}/files".format(self.CURA_API_ROOT, library_project_id)
+        self._http.get(url,
+                       scope = self._scope,
+                       callback = self._parseCallback(on_finished, DigitalFactoryFileResponse, failed),
+                       error_callback = failed,
+                       timeout = self.DEFAULT_REQUEST_TIMEOUT)
+
+    def _parseCallback(self,
+                       on_finished: Union[Callable[[CloudApiClientModel], Any],
+                                          Callable[[List[CloudApiClientModel]], Any]],
+                       model: Type[CloudApiClientModel],
+                       on_error: Optional[Callable] = None,
+                       pagination_manager: Optional[PaginationManager] = None) -> Callable[[QNetworkReply], None]:
+
+        """
+        Creates a callback function so that it includes the parsing of the response into the correct model.
+        The callback is added to the 'finished' signal of the reply. If a paginated request was made and a pagination
+        manager is given, the pagination metadata will be held there.
+
+        :param on_finished: The callback in case the response is successful. Depending on the endpoint it will be either
+        a list or a single item.
+        :param model: The type of the model to convert the response to.
+        :param on_error: The callback in case the response is ... less successful.
+        :param pagination_manager: Holds the pagination links and metadata contained in paginated responses.
+                                   If no pagination manager is provided, the pagination metadata is ignored.
+        """
+
+        def parse(reply: QNetworkReply) -> None:
+
+            self._anti_gc_callbacks.remove(parse)
+
+            # Don't try to parse the reply if we didn't get one
+            if reply.attribute(QNetworkRequest.HttpStatusCodeAttribute) is None:
+                if on_error is not None:
+                    on_error()
+                return
+
+            status_code, response = self._parseReply(reply)
+            if status_code >= 300 and on_error is not None:
+                on_error()
+            else:
+                self._parseModels(response, on_finished, model, pagination_manager = pagination_manager)
+
+        self._anti_gc_callbacks.append(parse)
+        return parse
+
+    @staticmethod
+    def _parseReply(reply: QNetworkReply) -> Tuple[int, Dict[str, Any]]:
+        """Parses the given JSON network reply into a status code and a dictionary, handling unexpected errors as well.
+
+        :param reply: The reply from the server.
+        :return: A tuple with a status code and a dictionary.
+        """
+
+        status_code = reply.attribute(QNetworkRequest.HttpStatusCodeAttribute)
+        try:
+            response = bytes(reply.readAll()).decode()
+            return status_code, json.loads(response)
+        except (UnicodeDecodeError, JSONDecodeError, ValueError) as err:
+            error = CloudError(code = type(err).__name__, title = str(err), http_code = str(status_code),
+                               id = str(time()), http_status = "500")
+            Logger.logException("e", "Could not parse the stardust response: %s", error.toDict())
+            return status_code, {"errors": [error.toDict()]}
+
+    def _parseModels(self,
+                     response: Dict[str, Any],
+                     on_finished: Union[Callable[[CloudApiClientModel], Any],
+                                        Callable[[List[CloudApiClientModel]], Any]],
+                     model_class: Type[CloudApiClientModel],
+                     pagination_manager: Optional[PaginationManager] = None) -> None:
+        """Parses the given models and calls the correct callback depending on the result.
+
+        :param response: The response from the server, after being converted to a dict.
+        :param on_finished: The callback in case the response is successful.
+        :param model_class: The type of the model to convert the response to. It may either be a single record or a list.
+        :param pagination_manager: Holds the pagination links and metadata contained in paginated responses.
+                                   If no pagination manager is provided, the pagination metadata is ignored.
+        """
+
+        if "data" in response:
+            data = response["data"]
+            if "meta" in response and pagination_manager:
+                pagination_manager.setResponseMeta(response["meta"])
+            if "links" in response and pagination_manager:
+                pagination_manager.setLinks(response["links"])
+            if isinstance(data, list):
+                results = [model_class(**c) for c in data]  # type: List[CloudApiClientModel]
+                on_finished_list = cast(Callable[[List[CloudApiClientModel]], Any], on_finished)
+                on_finished_list(results)
+            else:
+                result = model_class(**data)  # type: CloudApiClientModel
+                on_finished_item = cast(Callable[[CloudApiClientModel], Any], on_finished)
+                on_finished_item(result)
+        elif "errors" in response:
+            self._on_error([CloudError(**error) for error in response["errors"]])
+        else:
+            Logger.log("e", "Cannot find data or errors in the cloud response: %s", response)
+
+    def requestUpload3MF(self, request: DFLibraryFileUploadRequest,
+                         on_finished: Callable[[DFLibraryFileUploadResponse], Any],
+                         on_error: Optional[Callable[["QNetworkReply", "QNetworkReply.NetworkError"], None]] = None) -> None:
+
+        """Requests the Digital Factory to register the upload of a file in a library project.
+
+        :param request: The request object.
+        :param on_finished: The function to be called after the result is parsed.
+        :param on_error: The callback in case the request fails.
+        """
+
+        url = "{}/files/upload".format(self.CURA_API_ROOT)
+        data = json.dumps({"data": request.toDict()}).encode()
+
+        self._http.put(url,
+                       scope = self._scope,
+                       data = data,
+                       callback = self._parseCallback(on_finished, DFLibraryFileUploadResponse),
+                       error_callback = on_error,
+                       timeout = self.DEFAULT_REQUEST_TIMEOUT)
+
+    def requestUploadUFP(self, request: DFPrintJobUploadRequest,
+                         on_finished: Callable[[DFPrintJobUploadResponse], Any],
+                         on_error: Optional[Callable[["QNetworkReply", "QNetworkReply.NetworkError"], None]] = None) -> None:
+        """Requests the Digital Factory to register the upload of a file in a library project.
+
+        :param request: The request object.
+        :param on_finished: The function to be called after the result is parsed.
+        :param on_error: The callback in case the request fails.
+        """
+
+        url = "{}/jobs/upload".format(self.CURA_API_ROOT)
+        data = json.dumps({"data": request.toDict()}).encode()
+
+        self._http.put(url,
+                       scope = self._scope,
+                       data = data,
+                       callback = self._parseCallback(on_finished, DFPrintJobUploadResponse),
+                       error_callback = on_error,
+                       timeout = self.DEFAULT_REQUEST_TIMEOUT)
+
+    def uploadExportedFileData(self,
+                               df_file_upload_response: Union[DFLibraryFileUploadResponse, DFPrintJobUploadResponse],
+                               mesh: bytes,
+                               on_finished: Callable[[str], Any],
+                               on_success: Callable[[str], Any],
+                               on_progress: Callable[[str, int], Any],
+                               on_error: Callable[[str, "QNetworkReply", "QNetworkReply.NetworkError"], Any]) -> None:
+
+        """Uploads an exported file (in bytes) to the Digital Factory Library.
+
+        :param df_file_upload_response: The response received after requesting an upload with `self.requestUpload`.
+        :param mesh: The mesh data (in bytes) to be uploaded.
+        :param on_finished: The function to be called after the upload has finished. Called both after on_success and on_error.
+                            It receives the name of the file that has finished uploading.
+        :param on_success: The function to be called if the upload was successful.
+                            It receives the name of the file that was uploaded successfully.
+        :param on_progress: A function to be called during upload progress. It receives a percentage (0-100).
+                            It receives the name of the file for which the upload progress should be updated.
+        :param on_error: A function to be called if the upload fails.
+                         It receives the name of the file that produced errors during the upload process.
+        """
+
+        self._file_uploader = DFFileUploader(self._http, df_file_upload_response, mesh, on_finished, on_success, on_progress, on_error)
+        self._file_uploader.start()
+
+    def createNewProject(self, project_name: str, on_finished: Callable[[DigitalFactoryProjectResponse], Any], on_error: Callable) -> None:
+        """ Create a new project in the Digital Factory.
+
+        :param project_name: Name of the new to be created project.
+        :param on_finished: The function to be called after the result is parsed.
+        :param on_error: The function to be called if anything goes wrong.
+        """
+        Logger.log("i", "Attempt to create new DF project '{}'.".format(project_name))
+
+        url = "{}/projects".format(self.CURA_API_ROOT)
+        data = json.dumps({"data": {"display_name": project_name}}).encode()
+        self._http.put(url,
+                       scope = self._scope,
+                       data = data,
+                       callback = self._parseCallback(on_finished, DigitalFactoryProjectResponse),
+                       error_callback = on_error,
+                       timeout = self.DEFAULT_REQUEST_TIMEOUT)
+
+    def clear(self) -> None:
+        if self._projects_pagination_mgr is not None:
+            self._projects_pagination_mgr.reset()

plugins/DigitalLibrary/src/DigitalFactoryController.py

@@ -0,0 +1,620 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+import json
+import math
+import os
+import tempfile
+import threading
+from enum import IntEnum
+from pathlib import Path
+from typing import Optional, List, Dict, Any, cast
+
+from PyQt5.QtCore import pyqtSignal, QObject, pyqtSlot, pyqtProperty, Q_ENUMS, QTimer, QUrl
+from PyQt5.QtNetwork import QNetworkReply
+from PyQt5.QtQml import qmlRegisterType, qmlRegisterUncreatableType
+
+from UM.FileHandler.FileHandler import FileHandler
+from UM.Logger import Logger
+from UM.Message import Message
+from UM.Scene.SceneNode import SceneNode
+from UM.Signal import Signal
+from UM.TaskManagement.HttpRequestManager import HttpRequestManager
+from cura.API import Account
+from cura.CuraApplication import CuraApplication
+from cura.UltimakerCloud.UltimakerCloudScope import UltimakerCloudScope
+from .DFFileExportAndUploadManager import DFFileExportAndUploadManager
+from .DigitalFactoryApiClient import DigitalFactoryApiClient
+from .DigitalFactoryFileModel import DigitalFactoryFileModel
+from .DigitalFactoryFileResponse import DigitalFactoryFileResponse
+from .DigitalFactoryProjectModel import DigitalFactoryProjectModel
+from .DigitalFactoryProjectResponse import DigitalFactoryProjectResponse
+
+
+class RetrievalStatus(IntEnum):
+    """
+    The status of an http get request.
+
+    This is not an enum, because we want to use it in QML and QML doesn't recognize Python enums.
+    """
+    Idle = 0
+    InProgress = 1
+    Success = 2
+    Failed = 3
+
+
+class DFRetrievalStatus(QObject):
+    """
+    Used as an intermediate QObject that registers the RetrievalStatus as a recognizable enum in QML, so that it can
+    be used within QML objects as DigitalFactory.RetrievalStatus.<status>
+    """
+
+    Q_ENUMS(RetrievalStatus)
+
+
+class DigitalFactoryController(QObject):
+
+    DISK_WRITE_BUFFER_SIZE = 256 * 1024  # 256 KB
+
+    selectedProjectIndexChanged = pyqtSignal(int, arguments = ["newProjectIndex"])
+    """Signal emitted whenever the selected project is changed in the projects dropdown menu"""
+
+    selectedFileIndicesChanged = pyqtSignal("QList<int>", arguments = ["newFileIndices"])
+    """Signal emitted whenever the selected file is changed in the files table"""
+
+    retrievingProjectsStatusChanged = pyqtSignal(int, arguments = ["status"])
+    """Signal emitted whenever the status of the 'retrieving projects' http get request is changed"""
+
+    retrievingFilesStatusChanged = pyqtSignal(int, arguments = ["status"])
+    """Signal emitted whenever the status of the 'retrieving files in project' http get request is changed"""
+
+    creatingNewProjectStatusChanged = pyqtSignal(int, arguments = ["status"])
+    """Signal emitted whenever the status of the 'create new library project' http get request is changed"""
+
+    hasMoreProjectsToLoadChanged = pyqtSignal()
+    """Signal emitted whenever the variable hasMoreProjectsToLoad is changed. This variable is used to determine if 
+    the paginated list of projects has more pages to show"""
+
+    preselectedProjectChanged = pyqtSignal()
+    """Signal emitted whenever a preselected project is set. Whenever there is a preselected project, it means that it is
+    the only project in the ProjectModel. When the preselected project is invalidated, the ProjectsModel needs to be
+    retrieved again."""
+
+    projectCreationErrorTextChanged = pyqtSignal()
+    """Signal emitted whenever the creation of a new project fails and a specific error message is returned from the
+    server."""
+
+    """Signals to inform about the process of the file upload"""
+    uploadStarted = Signal()
+    uploadFileProgress = Signal()
+    uploadFileSuccess = Signal()
+    uploadFileError = Signal()
+    uploadFileFinished = Signal()
+
+    """Signal to inform about the state of user access."""
+    userAccessStateChanged = pyqtSignal(bool)
+
+    """Signal to inform whether the user is allowed to create more Library projects."""
+    userCanCreateNewLibraryProjectChanged = pyqtSignal(bool)
+
+    def __init__(self, application: CuraApplication) -> None:
+        super().__init__(parent = None)
+
+        self._application = application
+        self._dialog = None  # type: Optional["QObject"]
+
+        self.file_handlers = {}  # type: Dict[str, FileHandler]
+        self.nodes = None  # type: Optional[List[SceneNode]]
+        self.file_upload_manager = None  # type: Optional[DFFileExportAndUploadManager]
+        self._has_preselected_project = False  # type: bool
+
+        self._api = DigitalFactoryApiClient(self._application, on_error = lambda error: Logger.log("e", str(error)), projects_limit_per_page = 20)
+
+        # Indicates whether there are more pages of projects that can be loaded from the API
+        self._has_more_projects_to_load = False
+
+        self._account = self._application.getInstance().getCuraAPI().account  # type: Account
+        self._account.loginStateChanged.connect(self._onLoginStateChanged)
+        self._current_workspace_information = CuraApplication.getInstance().getCurrentWorkspaceInformation()
+
+        # Initialize the project model
+        self._project_model = DigitalFactoryProjectModel()
+        self._selected_project_idx = -1
+        self._project_creation_error_text = "Something went wrong while creating a new project. Please try again."
+        self._project_filter = ""
+        self._project_filter_change_timer = QTimer()
+        self._project_filter_change_timer.setInterval(200)
+        self._project_filter_change_timer.setSingleShot(True)
+        self._project_filter_change_timer.timeout.connect(self._applyProjectFilter)
+
+        # Initialize the file model
+        self._file_model = DigitalFactoryFileModel()
+        self._selected_file_indices = []  # type: List[int]
+
+        # Filled after the application has been initialized
+        self._supported_file_types = {}  # type: Dict[str, str]
+
+        # For cleaning up the files afterwards:
+        self._erase_temp_files_lock = threading.Lock()
+
+        # The statuses which indicate whether Cura is waiting for a response from the DigitalFactory API
+        self.retrieving_files_status = RetrievalStatus.Idle
+        self.retrieving_projects_status = RetrievalStatus.Idle
+        self.creating_new_project_status = RetrievalStatus.Idle
+
+        self._application.engineCreatedSignal.connect(self._onEngineCreated)
+        self._application.initializationFinished.connect(self._applicationInitializationFinished)
+
+        self._user_has_access = False
+        self._user_account_can_create_new_project = False
+
+    def clear(self) -> None:
+        self._project_model.clearProjects()
+        self._api.clear()
+        self._has_preselected_project = False
+        self.preselectedProjectChanged.emit()
+
+        self.setRetrievingFilesStatus(RetrievalStatus.Idle)
+        self.setRetrievingProjectsStatus(RetrievalStatus.Idle)
+        self.setCreatingNewProjectStatus(RetrievalStatus.Idle)
+
+        self.setSelectedProjectIndex(-1)
+
+    def _onLoginStateChanged(self, logged_in: bool) -> None:
+        def callback(has_access, **kwargs):
+            self._user_has_access = has_access
+            self.userAccessStateChanged.emit(logged_in)
+
+        self._api.checkUserHasAccess(callback)
+
+    def userAccountHasLibraryAccess(self) -> bool:
+        """
+        Checks whether the currently logged in user account has access to the Digital Library
+
+        :return: True if the user account has Digital Library access, else False
+        """
+        if self._user_has_access:
+            self._api.checkUserCanCreateNewLibraryProject(callback = self.setCanCreateNewLibraryProject)
+        return self._user_has_access
+
+    def initialize(self, preselected_project_id: Optional[str] = None) -> None:
+        self.clear()
+
+        if self._account.isLoggedIn and self.userAccountHasLibraryAccess():
+            self.setRetrievingProjectsStatus(RetrievalStatus.InProgress)
+            if preselected_project_id:
+                self._api.getProject(preselected_project_id, on_finished = self.setProjectAsPreselected, failed = self._onGetProjectFailed)
+            else:
+                self._api.getProjectsFirstPage(search_filter = self._project_filter, on_finished = self._onGetProjectsFirstPageFinished, failed = self._onGetProjectsFailed)
+
+    def setProjectAsPreselected(self, df_project: DigitalFactoryProjectResponse) -> None:
+        """
+        Sets the received df_project as the preselected one. When a project is preselected, it should be the only
+        project inside the model, so this function first makes sure to clear the projects model.
+
+        :param df_project: The library project intended to be set as preselected
+        """
+        self._project_model.clearProjects()
+        self._project_model.setProjects([df_project])
+        self.setSelectedProjectIndex(0)
+        self.setHasPreselectedProject(True)
+        self.setRetrievingProjectsStatus(RetrievalStatus.Success)
+        self.setCreatingNewProjectStatus(RetrievalStatus.Success)
+
+    def _onGetProjectFailed(self, reply: QNetworkReply, error: QNetworkReply.NetworkError) -> None:
+        reply_string = bytes(reply.readAll()).decode()
+        self.setHasPreselectedProject(False)
+        Logger.log("w", "Something went wrong while trying to retrieve a the preselected Digital Library project. Error: {}".format(reply_string))
+
+    def _onGetProjectsFirstPageFinished(self, df_projects: List[DigitalFactoryProjectResponse]) -> None:
+        """
+        Set the first page of projects received from the digital factory library in the project model. Called whenever
+        the retrieval of the first page of projects is successful.
+
+        :param df_projects: A list of all the Digital Factory Library projects linked to the user's account
+        """
+        self.setHasMoreProjectsToLoad(self._api.hasMoreProjectsToLoad())
+        self._project_model.setProjects(df_projects)
+        self.setRetrievingProjectsStatus(RetrievalStatus.Success)
+
+    @pyqtSlot()
+    def loadMoreProjects(self) -> None:
+        """
+        Initiates the process of retrieving the next page of the projects list from the API.
+        """
+        self._api.getMoreProjects(on_finished = self.loadMoreProjectsFinished, failed = self._onGetProjectsFailed)
+        self.setRetrievingProjectsStatus(RetrievalStatus.InProgress)
+
+    def loadMoreProjectsFinished(self, df_projects: List[DigitalFactoryProjectResponse]) -> None:
+        """
+        Set the projects received from the digital factory library in the project model. Called whenever the retrieval
+        of the projects is successful.
+
+        :param df_projects: A list of all the Digital Factory Library projects linked to the user's account
+        """
+        self.setHasMoreProjectsToLoad(self._api.hasMoreProjectsToLoad())
+        self._project_model.extendProjects(df_projects)
+        self.setRetrievingProjectsStatus(RetrievalStatus.Success)
+
+    def _onGetProjectsFailed(self, reply: QNetworkReply, error: QNetworkReply.NetworkError) -> None:
+        """
+        Error function, called whenever the retrieval of projects fails.
+        """
+        self.setRetrievingProjectsStatus(RetrievalStatus.Failed)
+        Logger.log("w", "Failed to retrieve the list of projects from the Digital Library. Error encountered: {}".format(error))
+
+    def getProjectFilesFinished(self, df_files_in_project: List[DigitalFactoryFileResponse]) -> None:
+        """
+        Set the files received from the digital factory library in the file model. The files are filtered to only
+        contain the files which can be opened by Cura.
+        Called whenever the retrieval of the files is successful.
+
+        :param df_files_in_project: A list of all the Digital Factory Library files that exist in a library project
+        """
+        # Filter to show only the files that can be opened in Cura
+        self._file_model.setFilters({"file_name": lambda x: Path(x).suffix[1:].lower() in self._supported_file_types})  # the suffix is in format '.xyz', so omit the dot at the start
+        self._file_model.setFiles(df_files_in_project)
+        self.setRetrievingFilesStatus(RetrievalStatus.Success)
+
+    def getProjectFilesFailed(self, reply: QNetworkReply, error: QNetworkReply.NetworkError) -> None:
+        """
+        Error function, called whenever the retrieval of the files in a library project fails.
+        """
+        Logger.log("w", "Failed to retrieve the list of files in project '{}' from the Digital Library".format(self._project_model._projects[self._selected_project_idx]))
+        self.setRetrievingFilesStatus(RetrievalStatus.Failed)
+
+    @pyqtSlot()
+    def clearProjectSelection(self) -> None:
+        """
+        Clear the selected project.
+        """
+        if self._has_preselected_project:
+            self.setHasPreselectedProject(False)
+        else:
+            self.setSelectedProjectIndex(-1)
+
+    @pyqtSlot(int)
+    def setSelectedProjectIndex(self, project_idx: int) -> None:
+        """
+        Sets the index of the project which is currently selected in the dropdown menu. Then, it uses the project_id of
+        that project to retrieve the list of files included in that project and display it in the interface.
+
+        :param project_idx: The index of the currently selected project
+        """
+        if project_idx < -1 or project_idx >= len(self._project_model.items):
+            Logger.log("w", "The selected project index is invalid.")
+            project_idx = -1  # -1 is a valid index for the combobox and it is handled as "nothing is selected"
+        self._selected_project_idx = project_idx
+        self.selectedProjectIndexChanged.emit(project_idx)
+
+        # Clear the files from the previously-selected project and refresh the files model with the newly-selected-
+        # project's files
+        self._file_model.clearFiles()
+        self.selectedFileIndicesChanged.emit([])
+        if 0 <= project_idx < len(self._project_model.items):
+            library_project_id = self._project_model.items[project_idx]["libraryProjectId"]
+            self.setRetrievingFilesStatus(RetrievalStatus.InProgress)
+            self._api.getListOfFilesInProject(library_project_id, on_finished = self.getProjectFilesFinished, failed = self.getProjectFilesFailed)
+
+    @pyqtProperty(int, fset = setSelectedProjectIndex, notify = selectedProjectIndexChanged)
+    def selectedProjectIndex(self) -> int:
+        return self._selected_project_idx
+
+    @pyqtSlot("QList<int>")
+    def setSelectedFileIndices(self, file_indices: List[int]) -> None:
+        """
+        Sets the index of the file which is currently selected in the list of files.
+
+        :param file_indices: The index of the currently selected file
+        """
+        if file_indices != self._selected_file_indices:
+            self._selected_file_indices = file_indices
+            self.selectedFileIndicesChanged.emit(file_indices)
+
+    def setProjectFilter(self, new_filter: str) -> None:
+        """
+        Called when the user wants to change the search filter for projects.
+
+        The filter is not immediately applied. There is some delay to allow the user to finish typing.
+        :param new_filter: The new filter that the user wants to apply.
+        """
+        self._project_filter = new_filter
+        self._project_filter_change_timer.start()
+
+    """
+    Signal to notify Qt that the applied filter has changed.
+    """
+    projectFilterChanged = pyqtSignal()
+
+    @pyqtProperty(str, notify = projectFilterChanged, fset = setProjectFilter)
+    def projectFilter(self) -> str:
+        """
+        The current search filter being applied to the project list.
+        :return: The current search filter being applied to the project list.
+        """
+        return self._project_filter
+
+    def _applyProjectFilter(self) -> None:
+        """
+        Actually apply the current filter to search for projects with the user-defined search string.
+        :return:
+        """
+        self.clear()
+        self.projectFilterChanged.emit()
+        self._api.getProjectsFirstPage(search_filter = self._project_filter, on_finished = self._onGetProjectsFirstPageFinished, failed = self._onGetProjectsFailed)
+
+    @pyqtProperty(QObject, constant = True)
+    def digitalFactoryProjectModel(self) -> "DigitalFactoryProjectModel":
+        return self._project_model
+
+    @pyqtProperty(QObject, constant = True)
+    def digitalFactoryFileModel(self) -> "DigitalFactoryFileModel":
+        return self._file_model
+
+    def setHasMoreProjectsToLoad(self, has_more_projects_to_load: bool) -> None:
+        """
+        Set the value that indicates whether there are more pages of projects that can be loaded from the API
+
+        :param has_more_projects_to_load: Whether there are more pages of projects
+        """
+        if has_more_projects_to_load != self._has_more_projects_to_load:
+            self._has_more_projects_to_load = has_more_projects_to_load
+            self.hasMoreProjectsToLoadChanged.emit()
+
+    @pyqtProperty(bool, fset = setHasMoreProjectsToLoad, notify = hasMoreProjectsToLoadChanged)
+    def hasMoreProjectsToLoad(self) -> bool:
+        """
+        :return: whether there are more pages for projects that can be loaded from the API
+        """
+        return self._has_more_projects_to_load
+
+    @pyqtSlot(str)
+    def createLibraryProjectAndSetAsPreselected(self, project_name: Optional[str]) -> None:
+        """
+        Creates a new project with the given name in the Digital Library.
+
+        :param project_name: The name that will be used for the new project
+        """
+        if project_name:
+            self._api.createNewProject(project_name, self.setProjectAsPreselected, self._createNewLibraryProjectFailed)
+            self.setCreatingNewProjectStatus(RetrievalStatus.InProgress)
+        else:
+            Logger.log("w", "No project name provided while attempting to create a new project. Aborting the project creation.")
+
+    def _createNewLibraryProjectFailed(self, reply: QNetworkReply, error: QNetworkReply.NetworkError) -> None:
+        reply_string = bytes(reply.readAll()).decode()
+
+        self._project_creation_error_text = "Something went wrong while creating the new project. Please try again."
+        if reply_string:
+            reply_dict = json.loads(reply_string)
+            if "errors" in reply_dict and len(reply_dict["errors"]) >= 1 and "title" in reply_dict["errors"][0]:
+                self._project_creation_error_text = "Error while creating the new project: {}".format(reply_dict["errors"][0]["title"])
+        self.projectCreationErrorTextChanged.emit()
+
+        self.setCreatingNewProjectStatus(RetrievalStatus.Failed)
+        Logger.log("e", "Something went wrong while trying to create a new a project. Error: {}".format(reply_string))
+
+    def setRetrievingProjectsStatus(self, new_status: RetrievalStatus) -> None:
+        """
+        Sets the status of the "retrieving library projects" http call.
+
+        :param new_status: The new status
+        """
+        self.retrieving_projects_status = new_status
+        self.retrievingProjectsStatusChanged.emit(int(new_status))
+
+    @pyqtProperty(int, fset = setRetrievingProjectsStatus, notify = retrievingProjectsStatusChanged)
+    def retrievingProjectsStatus(self) -> int:
+        return int(self.retrieving_projects_status)
+
+    def setRetrievingFilesStatus(self, new_status: RetrievalStatus) -> None:
+        """
+        Sets the status of the "retrieving files list in the selected library project" http call.
+
+        :param new_status: The new status
+        """
+        self.retrieving_files_status = new_status
+        self.retrievingFilesStatusChanged.emit(int(new_status))
+
+    @pyqtProperty(int, fset = setRetrievingFilesStatus, notify = retrievingFilesStatusChanged)
+    def retrievingFilesStatus(self) -> int:
+        return int(self.retrieving_files_status)
+
+    def setCreatingNewProjectStatus(self, new_status: RetrievalStatus) -> None:
+        """
+        Sets the status of the "creating new library project" http call.
+
+        :param new_status: The new status
+        """
+        self.creating_new_project_status = new_status
+        self.creatingNewProjectStatusChanged.emit(int(new_status))
+
+    @pyqtProperty(int, fset = setCreatingNewProjectStatus, notify = creatingNewProjectStatusChanged)
+    def creatingNewProjectStatus(self) -> int:
+        return int(self.creating_new_project_status)
+
+    @staticmethod
+    def _onEngineCreated() -> None:
+        qmlRegisterUncreatableType(DFRetrievalStatus, "DigitalFactory", 1, 0, "RetrievalStatus", "Could not create RetrievalStatus enum type")
+
+    def _applicationInitializationFinished(self) -> None:
+        self._supported_file_types = self._application.getInstance().getMeshFileHandler().getSupportedFileTypesRead()
+
+        # Although Cura supports these, it's super confusing in this context to show them.
+        for extension in ["jpg", "jpeg", "png", "bmp", "gif"]:
+            if extension in self._supported_file_types:
+                del self._supported_file_types[extension]
+
+    @pyqtSlot()
+    def openSelectedFiles(self) -> None:
+        """ Downloads, then opens all files selected in the Qt frontend open dialog.
+        """
+
+        temp_dir = tempfile.mkdtemp()
+        if temp_dir is None or temp_dir == "":
+            Logger.error("Digital Library: Couldn't create temporary directory to store to-be downloaded files.")
+            return
+
+        if self._selected_project_idx < 0 or len(self._selected_file_indices) < 1:
+            Logger.error("Digital Library: No project or no file selected on open action.")
+            return
+
+        to_erase_on_done_set = {
+            os.path.join(temp_dir, self._file_model.getItem(i)["fileName"]).replace('\\', '/')
+            for i in self._selected_file_indices}
+
+        def onLoadedCallback(filename_done: str) -> None:
+            filename_done = os.path.join(temp_dir, filename_done).replace('\\', '/')
+            with self._erase_temp_files_lock:
+                if filename_done in to_erase_on_done_set:
+                    try:
+                        os.remove(filename_done)
+                        to_erase_on_done_set.remove(filename_done)
+                        if len(to_erase_on_done_set) < 1 and os.path.exists(temp_dir):
+                            os.rmdir(temp_dir)
+                    except (IOError, OSError) as ex:
+                        Logger.error("Can't erase temporary (in) {0} because {1}.", temp_dir, str(ex))
+
+            # Save the project id to make sure it will be preselected the next time the user opens the save dialog
+            CuraApplication.getInstance().getCurrentWorkspaceInformation().setEntryToStore("digital_factory", "library_project_id", library_project_id)
+
+            # Disconnect the signals so that they are not fired every time another (project) file is loaded
+            app.fileLoaded.disconnect(onLoadedCallback)
+            app.workspaceLoaded.disconnect(onLoadedCallback)
+
+        app = CuraApplication.getInstance()
+        app.fileLoaded.connect(onLoadedCallback)  # fired when non-project files are loaded
+        app.workspaceLoaded.connect(onLoadedCallback)  # fired when project files are loaded
+
+        project_name = self._project_model.getItem(self._selected_project_idx)["displayName"]
+        for file_index in self._selected_file_indices:
+            file_item = self._file_model.getItem(file_index)
+            file_name = file_item["fileName"]
+            download_url = file_item["downloadUrl"]
+            library_project_id = file_item["libraryProjectId"]
+            self._openSelectedFile(temp_dir, project_name, file_name, download_url)
+
+    def _openSelectedFile(self, temp_dir: str, project_name: str, file_name: str, download_url: str) -> None:
+        """ Downloads, then opens, the single specified file.
+
+        :param temp_dir: The already created temporary directory where the files will be stored.
+        :param project_name: Name of the project the file belongs to (used for error reporting).
+        :param file_name: Name of the file to be downloaded and opened (used for error reporting).
+        :param download_url: This url will be downloaded, then the downloaded file will be opened in Cura.
+        """
+        if not download_url:
+            Logger.log("e", "No download url for file '{}'".format(file_name))
+            return
+
+        progress_message = Message(text = "{0}/{1}".format(project_name, file_name), dismissable = False, lifetime = 0,
+                                   progress = 0, title = "Downloading...")
+        progress_message.setProgress(0)
+        progress_message.show()
+
+        def progressCallback(rx: int, rt: int) -> None:
+            progress_message.setProgress(math.floor(rx * 100.0 / rt))
+
+        def finishedCallback(reply: QNetworkReply) -> None:
+            progress_message.hide()
+            try:
+                with open(os.path.join(temp_dir, file_name), "wb+") as temp_file:
+                    bytes_read = reply.read(self.DISK_WRITE_BUFFER_SIZE)
+                    while bytes_read:
+                        temp_file.write(bytes_read)
+                        bytes_read = reply.read(self.DISK_WRITE_BUFFER_SIZE)
+                        CuraApplication.getInstance().processEvents()
+                    temp_file_name = temp_file.name
+            except IOError as ex:
+                Logger.logException("e", "Can't write Digital Library file {0}/{1} download to temp-directory {2}.",
+                                    ex, project_name, file_name, temp_dir)
+                Message(
+                        text = "Failed to write to temporary file for '{}'.".format(file_name),
+                        title = "File-system error",
+                        lifetime = 10
+                ).show()
+                return
+
+            CuraApplication.getInstance().readLocalFile(
+                    QUrl.fromLocalFile(temp_file_name), add_to_recent_files = False)
+
+        def errorCallback(reply: QNetworkReply, error: QNetworkReply.NetworkError, p = project_name,
+                          f = file_name) -> None:
+            progress_message.hide()
+            Logger.error("An error {0} {1} occurred while downloading {2}/{3}".format(str(error), str(reply), p, f))
+            Message(
+                    text = "Failed Digital Library download for '{}'.".format(f),
+                    title = "Network error {}".format(error),
+                    lifetime = 10
+            ).show()
+
+        download_manager = HttpRequestManager.getInstance()
+        download_manager.get(download_url, callback = finishedCallback, download_progress_callback = progressCallback,
+                             error_callback = errorCallback, scope = UltimakerCloudScope(CuraApplication.getInstance()))
+
+    def setHasPreselectedProject(self, new_has_preselected_project: bool) -> None:
+        if not new_has_preselected_project:
+            # The preselected project was the only one in the model, at index 0, so when we set the has_preselected_project to
+            # false, we also need to clean it from the projects model
+            self._project_model.clearProjects()
+            self.setSelectedProjectIndex(-1)
+            self._api.getProjectsFirstPage(search_filter = self._project_filter, on_finished = self._onGetProjectsFirstPageFinished, failed = self._onGetProjectsFailed)
+            self._api.checkUserCanCreateNewLibraryProject(callback = self.setCanCreateNewLibraryProject)
+            self.setRetrievingProjectsStatus(RetrievalStatus.InProgress)
+        self._has_preselected_project = new_has_preselected_project
+        self.preselectedProjectChanged.emit()
+
+    @pyqtProperty(bool, fset = setHasPreselectedProject, notify = preselectedProjectChanged)
+    def hasPreselectedProject(self) -> bool:
+        return self._has_preselected_project
+
+    def setCanCreateNewLibraryProject(self, can_create_new_library_project: bool) -> None:
+        self._user_account_can_create_new_project = can_create_new_library_project
+        self.userCanCreateNewLibraryProjectChanged.emit(self._user_account_can_create_new_project)
+
+    @pyqtProperty(bool, fset = setCanCreateNewLibraryProject, notify = userCanCreateNewLibraryProjectChanged)
+    def userAccountCanCreateNewLibraryProject(self) -> bool:
+        return self._user_account_can_create_new_project
+
+    @pyqtSlot(str, "QStringList")
+    def saveFileToSelectedProject(self, filename: str, formats: List[str]) -> None:
+        """
+        Function triggered whenever the Save button is pressed.
+
+        :param filename: The name (without the extension) that will be used for the files
+        :param formats: List of the formats the scene will be exported to. Can include 3mf, ufp, or both
+        """
+        if self._selected_project_idx == -1:
+            Logger.log("e", "No DF Library project is selected.")
+            return
+
+        if filename == "":
+            Logger.log("w", "The file name cannot be empty.")
+            Message(text = "Cannot upload file with an empty name to the Digital Library", title = "Empty file name provided", lifetime = 0).show()
+            return
+
+        self._saveFileToSelectedProjectHelper(filename, formats)
+
+    def _saveFileToSelectedProjectHelper(self, filename: str, formats: List[str]) -> None:
+        # Indicate we have started sending a job.
+        self.uploadStarted.emit()
+
+        library_project_id = self._project_model.items[self._selected_project_idx]["libraryProjectId"]
+        library_project_name = self._project_model.items[self._selected_project_idx]["displayName"]
+
+        # Use the file upload manager to export and upload the 3mf and/or ufp files to the DF Library project
+        self.file_upload_manager = DFFileExportAndUploadManager(file_handlers = self.file_handlers, nodes = cast(List[SceneNode], self.nodes),
+                                                                library_project_id = library_project_id,
+                                                                library_project_name = library_project_name,
+                                                                file_name = filename, formats = formats,
+                                                                on_upload_error = self.uploadFileError.emit,
+                                                                on_upload_success = self.uploadFileSuccess.emit,
+                                                                on_upload_finished = self.uploadFileFinished.emit,
+                                                                on_upload_progress = self.uploadFileProgress.emit)
+        self.file_upload_manager.start()
+
+        # Save the project id to make sure it will be preselected the next time the user opens the save dialog
+        self._current_workspace_information.setEntryToStore("digital_factory", "library_project_id", library_project_id)
+
+    @pyqtProperty(str, notify = projectCreationErrorTextChanged)
+    def projectCreationErrorText(self) -> str:
+        return self._project_creation_error_text

plugins/DigitalLibrary/src/DigitalFactoryFeatureBudgetResponse.py

@@ -0,0 +1,43 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from .BaseModel import BaseModel
+from typing import Optional
+
+
+class DigitalFactoryFeatureBudgetResponse(BaseModel):
+    """Class representing the capabilities of a user account for Digital Library.
+       NOTE: For each max_..._projects fields, '-1' means unlimited!
+    """
+
+    def __init__(self,
+                 library_can_use_business_value: Optional[bool] = False,
+                 library_can_use_comments: Optional[bool] = False,
+                 library_can_use_status: Optional[bool] = False,
+                 library_can_use_tags: Optional[bool] = False,
+                 library_can_use_technical_requirements: Optional[bool] = False,
+                 library_max_organization_shared_projects: Optional[int] = None,  # -1 means unlimited
+                 library_max_private_projects: Optional[int] = None,  # -1 means unlimited
+                 library_max_team_shared_projects: Optional[int] = None,  # -1 means unlimited
+                 **kwargs) -> None:
+
+        self.library_can_use_business_value = library_can_use_business_value
+        self.library_can_use_comments = library_can_use_comments
+        self.library_can_use_status = library_can_use_status
+        self.library_can_use_tags = library_can_use_tags
+        self.library_can_use_technical_requirements = library_can_use_technical_requirements
+        self.library_max_organization_shared_projects = library_max_organization_shared_projects  # -1 means unlimited
+        self.library_max_private_projects = library_max_private_projects  # -1 means unlimited
+        self.library_max_team_shared_projects = library_max_team_shared_projects  # -1 means unlimited
+        super().__init__(**kwargs)
+
+    def __repr__(self) -> str:
+        return "max private: {}, max org: {}, max team: {}".format(
+            self.library_max_private_projects,
+            self.library_max_organization_shared_projects,
+            self.library_max_team_shared_projects)
+
+    # Validates the model, raising an exception if the model is invalid.
+    def validate(self) -> None:
+        super().validate()
+        # No validation for now, as the response can be "data: []", which should be interpreted as all False and 0's

plugins/DigitalLibrary/src/DigitalFactoryFileModel.py

@@ -0,0 +1,116 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+from typing import List, Dict, Callable
+
+from PyQt5.QtCore import Qt, pyqtSignal
+
+from UM.Logger import Logger
+from UM.Qt.ListModel import ListModel
+from .DigitalFactoryFileResponse import DigitalFactoryFileResponse
+
+
+DIGITAL_FACTORY_DISPLAY_DATETIME_FORMAT = "%d-%m-%Y %H:%M"
+
+
+class DigitalFactoryFileModel(ListModel):
+    FileNameRole = Qt.UserRole + 1
+    FileIdRole = Qt.UserRole + 2
+    FileSizeRole = Qt.UserRole + 3
+    LibraryProjectIdRole = Qt.UserRole + 4
+    DownloadUrlRole = Qt.UserRole + 5
+    UsernameRole = Qt.UserRole + 6
+    UploadedAtRole = Qt.UserRole + 7
+
+    dfFileModelChanged = pyqtSignal()
+
+    def __init__(self, parent = None):
+        super().__init__(parent)
+
+        self.addRoleName(self.FileNameRole, "fileName")
+        self.addRoleName(self.FileIdRole, "fileId")
+        self.addRoleName(self.FileSizeRole, "fileSize")
+        self.addRoleName(self.LibraryProjectIdRole, "libraryProjectId")
+        self.addRoleName(self.DownloadUrlRole, "downloadUrl")
+        self.addRoleName(self.UsernameRole, "username")
+        self.addRoleName(self.UploadedAtRole, "uploadedAt")
+        
+        self._files = []  # type: List[DigitalFactoryFileResponse]
+        self._filters = {}  # type: Dict[str, Callable]
+
+    def setFiles(self, df_files_in_project: List[DigitalFactoryFileResponse]) -> None:
+        if self._files == df_files_in_project:
+            return
+        self.clear()
+        self._files = df_files_in_project
+        self._update()
+
+    def clearFiles(self) -> None:
+        self.clear()
+        self._files.clear()
+        self.dfFileModelChanged.emit()
+
+    def _update(self) -> None:
+        filtered_files_list = self.getFilteredFilesList()
+
+        for file in filtered_files_list:
+            self.appendItem({
+                "fileName" : file.file_name,
+                "fileId" : file.file_id,
+                "fileSize": file.file_size,
+                "libraryProjectId": file.library_project_id,
+                "downloadUrl": file.download_url,
+                "username": file.username,
+                "uploadedAt": file.uploaded_at.strftime(DIGITAL_FACTORY_DISPLAY_DATETIME_FORMAT)
+            })
+
+        self.dfFileModelChanged.emit()
+
+    def setFilters(self, filters: Dict[str, Callable]) -> None:
+        """
+        Sets the filters and updates the files model to contain only the files that meet all of the filters.
+
+        :param filters: The filters to be applied
+            example:
+            {
+                "attribute_name1": function_to_be_applied_on_DigitalFactoryFileResponse_attribute1,
+                "attribute_name2": function_to_be_applied_on_DigitalFactoryFileResponse_attribute2
+            }
+        """
+        self.clear()
+        self._filters = filters
+        self._update()
+
+    def clearFilters(self) -> None:
+        """
+        Clears all the model filters
+        """
+        self.setFilters({})
+
+    def getFilteredFilesList(self) -> List[DigitalFactoryFileResponse]:
+        """
+        Lists the files that meet all the filters specified in the self._filters. This is achieved by applying each
+        filter function on the corresponding attribute for all the filters in the self._filters. If all of them are
+        true, the file is added to the filtered files list.
+        In order for this to work, the self._filters should be in the format:
+        {
+            "attribute_name": function_to_be_applied_on_the_DigitalFactoryFileResponse_attribute
+        }
+
+        :return: The list of files that meet all the specified filters
+        """
+        if not self._filters:
+            return self._files
+
+        filtered_files_list = []
+        for file in self._files:
+            filter_results = []
+            for attribute, filter_func in self._filters.items():
+                try:
+                    filter_results.append(filter_func(getattr(file, attribute)))
+                except AttributeError:
+                    Logger.log("w", "Attribute '{}' doesn't exist in objects of type '{}'".format(attribute, type(file)))
+            all_filters_met = all(filter_results)
+            if all_filters_met:
+                filtered_files_list.append(file)
+
+        return filtered_files_list

plugins/DigitalLibrary/src/DigitalFactoryFileProvider.py

@@ -0,0 +1,62 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+import os
+
+from UM.FileProvider import FileProvider
+from UM.Logger import Logger
+from cura.API import Account
+from cura.CuraApplication import CuraApplication
+from .DigitalFactoryController import DigitalFactoryController
+
+
+class DigitalFactoryFileProvider(FileProvider):
+
+    def __init__(self, df_controller: DigitalFactoryController) -> None:
+        super().__init__()
+        self._controller = df_controller
+
+        self.menu_item_display_text = "From Digital Library"
+        self.shortcut = "Ctrl+Shift+O"
+        plugin_path = os.path.dirname(os.path.dirname(__file__))
+        self._dialog_path = os.path.join(plugin_path, "resources", "qml", "DigitalFactoryOpenDialog.qml")
+        self._dialog = None
+
+        self._account = CuraApplication.getInstance().getCuraAPI().account  # type: Account
+        self._controller.userAccessStateChanged.connect(self._onUserAccessStateChanged)
+        self.enabled = self._account.isLoggedIn and self._controller.userAccountHasLibraryAccess()
+        self.priority = 10
+
+    def run(self) -> None:
+        """
+        Function called every time the 'From Digital Factory' option of the 'Open File(s)' submenu is triggered
+        """
+        self.loadWindow()
+
+        if self._account.isLoggedIn and self._controller.userAccountHasLibraryAccess():
+            self._controller.initialize()
+
+            if not self._dialog:
+                Logger.log("e", "Unable to create the Digital Library Open dialog.")
+                return
+            self._dialog.show()
+
+    def loadWindow(self) -> None:
+        """
+        Create the GUI window for the Digital Library Open dialog. If the window is already open, bring the focus on it.
+        """
+
+        if self._dialog:  # Dialogue is already open.
+            self._dialog.requestActivate()  # Bring the focus on the dialogue.
+            return
+
+        self._dialog = CuraApplication.getInstance().createQmlComponent(self._dialog_path, {"manager": self._controller})
+        if not self._dialog:
+            Logger.log("e", "Unable to create the Digital Library Open dialog.")
+
+    def _onUserAccessStateChanged(self, logged_in: bool) -> None:
+        """
+        Sets the enabled status of the DigitalFactoryFileProvider according to the account's login status
+        :param logged_in: The new login status
+        """
+        self.enabled = logged_in and self._controller.userAccountHasLibraryAccess()
+        self.enabledChanged.emit()

plugins/DigitalLibrary/src/DigitalFactoryFileResponse.py

@@ -0,0 +1,57 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+from datetime import datetime
+from typing import Optional
+
+from .BaseModel import BaseModel
+
+DIGITAL_FACTORY_RESPONSE_DATETIME_FORMAT = "%Y-%m-%dT%H:%M:%S.%fZ"
+
+
+class DigitalFactoryFileResponse(BaseModel):
+    """Class representing a file in a digital factory project."""
+
+    def __init__(self, client_id: str, content_type: str, file_id: str, file_name: str, library_project_id: str,
+                 status: str, user_id: str, username: str,  uploaded_at: str, download_url: Optional[str] = "", status_description: Optional[str] = "",
+                 file_size: Optional[int] = 0, upload_url: Optional[str] = "", **kwargs) -> None:
+        """
+        Creates a new DF file response object
+
+        :param client_id:
+        :param content_type:
+        :param file_id:
+        :param file_name:
+        :param library_project_id:
+        :param status:
+        :param user_id:
+        :param username:
+        :param download_url:
+        :param status_description:
+        :param file_size:
+        :param upload_url:
+        :param kwargs:
+        """
+
+        self.client_id = client_id
+        self.content_type = content_type
+        self.download_url = download_url
+        self.file_id = file_id
+        self.file_name = file_name
+        self.file_size = file_size
+        self.library_project_id = library_project_id
+        self.status = status
+        self.status_description = status_description
+        self.upload_url = upload_url
+        self.user_id = user_id
+        self.username = username
+        self.uploaded_at = datetime.strptime(uploaded_at, DIGITAL_FACTORY_RESPONSE_DATETIME_FORMAT)
+        super().__init__(**kwargs)
+
+    def __repr__(self) -> str:
+        return "File: {}, from: {}, File ID: {}, Project ID: {}, Download URL: {}".format(self.file_name, self.username, self.file_id, self.library_project_id, self.download_url)
+
+    # Validates the model, raising an exception if the model is invalid.
+    def validate(self) -> None:
+        super().validate()
+        if not self.file_id:
+            raise ValueError("file_id is required in Digital Library file")

plugins/DigitalLibrary/src/DigitalFactoryOutputDevice.py

@@ -0,0 +1,118 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Uranium is released under the terms of the LGPLv3 or higher.
+import os
+from typing import Optional, List
+
+from UM.FileHandler.FileHandler import FileHandler
+from UM.Logger import Logger
+from UM.OutputDevice import OutputDeviceError
+from UM.OutputDevice.ProjectOutputDevice import ProjectOutputDevice
+from UM.Scene.SceneNode import SceneNode
+from cura.API import Account
+from cura.CuraApplication import CuraApplication
+from .DigitalFactoryController import DigitalFactoryController
+
+
+class DigitalFactoryOutputDevice(ProjectOutputDevice):
+    """Implements an OutputDevice that supports saving to the digital factory library."""
+
+    def __init__(self, plugin_id, df_controller: DigitalFactoryController, add_to_output_devices: bool = False, parent = None) -> None:
+        super().__init__(device_id = "digital_factory", add_to_output_devices = add_to_output_devices, parent = parent)
+
+        self.setName("Digital Library")  # Doesn't need to be translated
+        self.setShortDescription("Save to Library")
+        self.setDescription("Save to Library")
+        self.setIconName("save")
+        self.menu_entry_text = "To Digital Library"
+        self.shortcut = "Ctrl+Shift+S"
+        self._plugin_id = plugin_id
+        self._controller = df_controller
+
+        plugin_path = os.path.dirname(os.path.dirname(__file__))
+        self._dialog_path = os.path.join(plugin_path, "resources", "qml", "DigitalFactorySaveDialog.qml")
+        self._dialog = None
+
+        # Connect the write signals
+        self._controller.uploadStarted.connect(self._onWriteStarted)
+        self._controller.uploadFileProgress.connect(self.writeProgress.emit)
+        self._controller.uploadFileError.connect(self._onWriteError)
+        self._controller.uploadFileSuccess.connect(self.writeSuccess.emit)
+        self._controller.uploadFileFinished.connect(self._onWriteFinished)
+
+        self._priority = -1  # Negative value to ensure that it will have less priority than the LocalFileOutputDevice (which has 0)
+        self._application = CuraApplication.getInstance()
+
+        self._writing = False
+
+        self._account = CuraApplication.getInstance().getCuraAPI().account  # type: Account
+        self._controller.userAccessStateChanged.connect(self._onUserAccessStateChanged)
+        self.enabled = self._account.isLoggedIn and self._controller.userAccountHasLibraryAccess()
+
+        self._current_workspace_information = CuraApplication.getInstance().getCurrentWorkspaceInformation()
+
+    def requestWrite(self, nodes: List[SceneNode], file_name: Optional[str] = None, limit_mimetypes: bool = False, file_handler: Optional[FileHandler] = None, **kwargs) -> None:
+        """Request the specified nodes to be written.
+
+        Function called every time the 'To Digital Factory' option of the 'Save Project' submenu is triggered or when the
+        "Save to Library" action button is pressed (upon slicing).
+
+        :param nodes: A collection of scene nodes that should be written to the file.
+        :param file_name: A suggestion for the file name to write to.
+        :param limit_mimetypes: Limit the possible mimetypes to use for writing to these types.
+        :param file_handler: The handler responsible for reading and writing mesh files.
+        :param kwargs: Keyword arguments.
+        """
+
+        if self._writing:
+            raise OutputDeviceError.DeviceBusyError()
+        self.loadWindow()
+
+        if self._account.isLoggedIn and self._controller.userAccountHasLibraryAccess():
+            self._controller.nodes = nodes
+
+            df_workspace_information = self._current_workspace_information.getPluginMetadata("digital_factory")
+            self._controller.initialize(preselected_project_id = df_workspace_information.get("library_project_id"))
+
+            if not self._dialog:
+                Logger.log("e", "Unable to create the Digital Library Save dialog.")
+                return
+            self._dialog.show()
+
+    def loadWindow(self) -> None:
+        """
+        Create the GUI window for the Digital Library Save dialog. If the window is already open, bring the focus on it.
+        """
+
+        if self._dialog:  # Dialogue is already open.
+            self._dialog.requestActivate()  # Bring the focus on the dialogue.
+            return
+
+        if not self._controller.file_handlers:
+            self._controller.file_handlers = {
+                "3mf": CuraApplication.getInstance().getWorkspaceFileHandler(),
+                "ufp": CuraApplication.getInstance().getMeshFileHandler()
+            }
+
+        self._dialog = CuraApplication.getInstance().createQmlComponent(self._dialog_path, {"manager": self._controller})
+        if not self._dialog:
+            Logger.log("e", "Unable to create the Digital Library Save dialog.")
+
+    def _onUserAccessStateChanged(self, logged_in: bool) -> None:
+        """
+        Sets the enabled status of the DigitalFactoryOutputDevice according to the account's login status
+        :param logged_in: The new login status
+        """
+        self.enabled = logged_in and self._controller.userAccountHasLibraryAccess()
+        self.enabledChanged.emit()
+
+    def _onWriteStarted(self) -> None:
+        self._writing = True
+        self.writeStarted.emit(self)
+
+    def _onWriteFinished(self) -> None:
+        self._writing = False
+        self.writeFinished.emit(self)
+
+    def _onWriteError(self) -> None:
+        self._writing = False
+        self.writeError.emit(self)

plugins/DigitalLibrary/src/DigitalFactoryOutputDevicePlugin.py

@@ -0,0 +1,18 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Uranium is released under the terms of the LGPLv3 or higher.
+
+from UM.OutputDevice.OutputDevicePlugin import OutputDevicePlugin
+from .DigitalFactoryOutputDevice import DigitalFactoryOutputDevice
+from .DigitalFactoryController import DigitalFactoryController
+
+
+class DigitalFactoryOutputDevicePlugin(OutputDevicePlugin):
+    def __init__(self, df_controller: DigitalFactoryController) -> None:
+        super().__init__()
+        self.df_controller = df_controller
+
+    def start(self) -> None:
+        self.getOutputDeviceManager().addProjectOutputDevice(DigitalFactoryOutputDevice(plugin_id = self.getPluginId(), df_controller = self.df_controller, add_to_output_devices = True))
+
+    def stop(self) -> None:
+        self.getOutputDeviceManager().removeProjectOutputDevice("digital_factory")

plugins/DigitalLibrary/src/DigitalFactoryProjectModel.py

@@ -0,0 +1,64 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+from typing import List, Optional
+
+from PyQt5.QtCore import Qt, pyqtSignal
+
+from UM.Logger import Logger
+from UM.Qt.ListModel import ListModel
+from .DigitalFactoryProjectResponse import DigitalFactoryProjectResponse
+
+PROJECT_UPDATED_AT_DATETIME_FORMAT = "%d-%m-%Y"
+
+
+class DigitalFactoryProjectModel(ListModel):
+    DisplayNameRole = Qt.UserRole + 1
+    LibraryProjectIdRole = Qt.UserRole + 2
+    DescriptionRole = Qt.UserRole + 3
+    ThumbnailUrlRole = Qt.UserRole + 5
+    UsernameRole = Qt.UserRole + 6
+    LastUpdatedRole = Qt.UserRole + 7
+
+    dfProjectModelChanged = pyqtSignal()
+
+    def __init__(self, parent = None) -> None:
+        super().__init__(parent)
+        self.addRoleName(self.DisplayNameRole, "displayName")
+        self.addRoleName(self.LibraryProjectIdRole, "libraryProjectId")
+        self.addRoleName(self.DescriptionRole, "description")
+        self.addRoleName(self.ThumbnailUrlRole, "thumbnailUrl")
+        self.addRoleName(self.UsernameRole, "username")
+        self.addRoleName(self.LastUpdatedRole, "lastUpdated")
+        self._projects = []  # type: List[DigitalFactoryProjectResponse]
+
+    def setProjects(self, df_projects: List[DigitalFactoryProjectResponse]) -> None:
+        if self._projects == df_projects:
+            return
+        self._items.clear()
+        self._projects = df_projects
+        # self.sortProjectsBy("display_name")
+        self._update(df_projects)
+
+    def extendProjects(self, df_projects: List[DigitalFactoryProjectResponse]) -> None:
+        if not df_projects:
+            return
+        self._projects.extend(df_projects)
+        # self.sortProjectsBy("display_name")
+        self._update(df_projects)
+
+    def clearProjects(self) -> None:
+        self.clear()
+        self._projects.clear()
+        self.dfProjectModelChanged.emit()
+
+    def _update(self, df_projects: List[DigitalFactoryProjectResponse]) -> None:
+        for project in df_projects:
+            self.appendItem({
+                "displayName" : project.display_name,
+                "libraryProjectId" : project.library_project_id,
+                "description": project.description,
+                "thumbnailUrl": project.thumbnail_url,
+                "username": project.username,
+                "lastUpdated": project.last_updated.strftime(PROJECT_UPDATED_AT_DATETIME_FORMAT) if project.last_updated else "",
+            })
+        self.dfProjectModelChanged.emit()

plugins/DigitalLibrary/src/DigitalFactoryProjectResponse.py

@@ -0,0 +1,65 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+from datetime import datetime
+from typing import Optional, List, Dict, Any
+
+from .BaseModel import BaseModel
+from .DigitalFactoryFileResponse import DIGITAL_FACTORY_RESPONSE_DATETIME_FORMAT
+
+
+class DigitalFactoryProjectResponse(BaseModel):
+    """Class representing a cloud project."""
+
+    def __init__(self,
+                 library_project_id: str,
+                 display_name: str,
+                 username: str,
+                 organization_shared: bool,
+                 last_updated: Optional[str] = None,
+                 created_at: Optional[str] = None,
+                 thumbnail_url: Optional[str] = None,
+                 organization_id: Optional[str] = None,
+                 created_by_user_id: Optional[str] = None,
+                 description: Optional[str] = "",
+                 tags: Optional[List[str]] = None,
+                 team_ids: Optional[List[str]] = None,
+                 status: Optional[str] = None,
+                 technical_requirements: Optional[Dict[str, Any]] = None,
+                 **kwargs) -> None:
+        """
+        Creates a new digital factory project response object
+        :param library_project_id:
+        :param display_name:
+        :param username:
+        :param organization_shared:
+        :param thumbnail_url:
+        :param created_by_user_id:
+        :param description:
+        :param tags:
+        :param kwargs:
+        """
+
+        self.library_project_id = library_project_id
+        self.display_name = display_name
+        self.description = description
+        self.username = username
+        self.organization_shared = organization_shared
+        self.organization_id = organization_id
+        self.created_by_user_id = created_by_user_id
+        self.thumbnail_url = thumbnail_url
+        self.tags = tags
+        self.team_ids = team_ids
+        self.created_at = datetime.strptime(created_at, DIGITAL_FACTORY_RESPONSE_DATETIME_FORMAT) if created_at else None
+        self.last_updated = datetime.strptime(last_updated, DIGITAL_FACTORY_RESPONSE_DATETIME_FORMAT) if last_updated else None
+        self.status = status
+        self.technical_requirements = technical_requirements
+        super().__init__(**kwargs)
+
+    def __str__(self) -> str:
+        return "Project: {}, Id: {}, from: {}".format(self.display_name, self.library_project_id, self.username)
+
+    # Validates the model, raising an exception if the model is invalid.
+    def validate(self) -> None:
+        super().validate()
+        if not self.library_project_id:
+            raise ValueError("library_project_id is required on cloud project")

plugins/DigitalLibrary/src/ExportFileJob.py

@@ -0,0 +1,55 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+import io
+from typing import List, Optional, Union
+
+from UM.FileHandler.FileHandler import FileHandler
+from UM.FileHandler.FileWriter import FileWriter
+from UM.FileHandler.WriteFileJob import WriteFileJob
+from UM.Logger import Logger
+from UM.MimeTypeDatabase import MimeTypeDatabase
+from UM.OutputDevice import OutputDeviceError
+from UM.Scene.SceneNode import SceneNode
+
+
+class ExportFileJob(WriteFileJob):
+    """Job that exports the build plate to the correct file format for the Digital Factory Library project."""
+
+    def __init__(self, file_handler: FileHandler, nodes: List[SceneNode], job_name: str, extension: str) -> None:
+        file_types = file_handler.getSupportedFileTypesWrite()
+        if len(file_types) == 0:
+            Logger.log("e", "There are no file types available to write with!")
+            raise OutputDeviceError.WriteRequestFailedError("There are no file types available to write with!")
+
+        mode = None
+        file_writer = None
+        for file_type in file_types:
+            if file_type["extension"] == extension:
+                file_writer = file_handler.getWriter(file_type["id"])
+                mode = file_type.get("mode")
+        super().__init__(file_writer, self.createStream(mode = mode), nodes, mode)
+
+        # Determine the filename.
+        self.setFileName("{}.{}".format(job_name, extension))
+
+    def getOutput(self) -> bytes:
+        """Get the job result as bytes as that is what we need to upload to the Digital Factory Library."""
+
+        output = self.getStream().getvalue()
+        if isinstance(output, str):
+            output = output.encode("utf-8")
+        return output
+
+    def getMimeType(self) -> str:
+        """Get the mime type of the selected export file type."""
+        return MimeTypeDatabase.getMimeTypeForFile(self.getFileName()).name
+
+    @staticmethod
+    def createStream(mode) -> Union[io.BytesIO, io.StringIO]:
+        """Creates the right kind of stream based on the preferred format."""
+
+        if mode == FileWriter.OutputMode.TextMode:
+            return io.StringIO()
+        else:
+            return io.BytesIO()

plugins/DigitalLibrary/src/PaginationLinks.py

@@ -0,0 +1,30 @@
+# Copyright (c) 2021 Ultimaker B.V.
+
+from typing import Optional
+
+
+class PaginationLinks:
+    """Model containing pagination links."""
+
+    def __init__(self,
+                 first: Optional[str] = None,
+                 last: Optional[str] = None,
+                 next: Optional[str] = None,
+                 prev: Optional[str] = None,
+                 **kwargs) -> None:
+        """
+        Creates a new digital factory project response object
+        :param first: The URL for the first page.
+        :param last: The URL for the last page.
+        :param next: The URL for the next page.
+        :param prev: The URL for the prev page.
+        :param kwargs:
+        """
+
+        self.first_page = first
+        self.last_page = last
+        self.next_page = next
+        self.prev_page = prev
+
+    def __str__(self) -> str:
+        return "Pagination Links | First: {}, Last: {}, Next: {}, Prev: {}".format(self.first_page, self.last_page, self.next_page, self.prev_page)

plugins/DigitalLibrary/src/PaginationManager.py

@@ -0,0 +1,43 @@
+# Copyright (c) 2021 Ultimaker B.V.
+
+from typing import Optional, Dict, Any
+
+from .PaginationLinks import PaginationLinks
+from .PaginationMetadata import PaginationMetadata
+from .ResponseMeta import ResponseMeta
+
+
+class PaginationManager:
+
+    def __init__(self, limit: int) -> None:
+        self.limit = limit  # The limit of items per page
+        self.meta = None  # type: Optional[ResponseMeta]  # The metadata of the paginated response
+        self.links = None  # type: Optional[PaginationLinks]  # The pagination-related links
+
+    def setResponseMeta(self, meta: Optional[Dict[str, Any]]) -> None:
+        self.meta = None
+
+        if meta:
+            page = None
+            if "page" in meta:
+                page = PaginationMetadata(**meta["page"])
+            self.meta = ResponseMeta(page)
+
+    def setLinks(self, links: Optional[Dict[str, str]]) -> None:
+        self.links = PaginationLinks(**links) if links else None
+
+    def setLimit(self, new_limit: int) -> None:
+        """
+        Sets the limit of items per page.
+
+        :param new_limit: The new limit of items per page
+        """
+        self.limit = new_limit
+        self.reset()
+
+    def reset(self) -> None:
+        """
+        Sets the metadata and links to None.
+        """
+        self.meta = None
+        self.links = None

plugins/DigitalLibrary/src/PaginationMetadata.py

@@ -0,0 +1,25 @@
+# Copyright (c) 2021 Ultimaker B.V.
+
+from typing import Optional
+
+
+class PaginationMetadata:
+    """Class representing the metadata related to pagination."""
+
+    def __init__(self,
+                 total_count: Optional[int] = None,
+                 total_pages: Optional[int] = None,
+                 **kwargs) -> None:
+        """
+        Creates a new digital factory project response object
+        :param total_count: The total count of items.
+        :param total_pages: The total number of pages when pagination is applied.
+        :param kwargs:
+        """
+
+        self.total_count = total_count
+        self.total_pages = total_pages
+        self.__dict__.update(kwargs)
+
+    def __str__(self) -> str:
+        return "PaginationMetadata | Total Count: {}, Total Pages: {}".format(self.total_count, self.total_pages)

plugins/DigitalLibrary/src/ResponseMeta.py

@@ -0,0 +1,24 @@
+# Copyright (c) 2021 Ultimaker B.V.
+
+from typing import Optional
+
+from .PaginationMetadata import PaginationMetadata
+
+
+class ResponseMeta:
+    """Class representing the metadata included in a Digital Library response (if any)"""
+
+    def __init__(self,
+                 page: Optional[PaginationMetadata] = None,
+                 **kwargs) -> None:
+        """
+        Creates a new digital factory project response object
+        :param page: Metadata related to pagination
+        :param kwargs:
+        """
+
+        self.page = page
+        self.__dict__.update(kwargs)
+
+    def __str__(self) -> str:
+        return "Response Meta | {}".format(self.page)

plugins/DigitalLibrary/tests/TestDFFileExportAndUploadManager.py

@@ -0,0 +1,48 @@
+from unittest.mock import MagicMock, patch
+
+import pytest
+from src.DFFileExportAndUploadManager import DFFileExportAndUploadManager
+
+
+@pytest.fixture
+def upload_manager():
+    file_handler = MagicMock(name = "file_handler")
+    file_handler.getSupportedFileTypesWrite = MagicMock(return_value = [{
+                    "id": "test",
+                    "extension": ".3mf",
+                    "description": "nope",
+                    "mime_type": "application/vnd.ms-package.3dmanufacturing-3dmodel+xml",
+                    "mode": "binary",
+                    "hide_in_file_dialog": True,
+                }])
+    node = MagicMock(name = "SceneNode")
+    application = MagicMock(name = "CuraApplication")
+    with patch("cura.CuraApplication.CuraApplication.getInstance", MagicMock(return_value = application)):
+        return DFFileExportAndUploadManager(file_handlers = {"3mf": file_handler},
+                                            nodes = [node],
+                                            library_project_id = "test_library_project_id",
+                                            library_project_name = "test_library_project_name",
+                                            file_name = "file_name",
+                                            formats = ["3mf"],
+                                            on_upload_error = MagicMock(),
+                                            on_upload_success = MagicMock(),
+                                            on_upload_finished = MagicMock(),
+                                            on_upload_progress = MagicMock())
+
+
+@pytest.mark.parametrize("input,expected_result",
+                        [("", ""),
+                         ("invalid json! {}", ""),
+                         ("{\"errors\": [{}]}", ""),
+                         ("{\"errors\": [{\"title\": \"some title\"}]}", "some title")])
+def test_extractErrorTitle(upload_manager, input, expected_result):
+    assert upload_manager.extractErrorTitle(input) == expected_result
+
+
+def test_exportJobError(upload_manager):
+    mocked_application = MagicMock()
+    with patch("UM.Application.Application.getInstance", MagicMock(return_value = mocked_application)):
+        upload_manager._onJobExportError("file_name.3mf")
+
+    # Ensure that message was displayed
+    mocked_application.showMessageSignal.emit.assert_called_once()

plugins/DigitalLibrary/tests/TestDigitalFactoryFileModel.py

@@ -0,0 +1,73 @@
+from pathlib import Path
+
+from src.DigitalFactoryFileModel import DigitalFactoryFileModel
+from src.DigitalFactoryFileResponse import DigitalFactoryFileResponse
+
+
+file_1 = DigitalFactoryFileResponse(client_id = "client_id_1",
+                                    content_type = "zomg",
+                                    file_name = "file_1.3mf",
+                                    file_id = "file_id_1",
+                                    library_project_id = "project_id_1",
+                                    status = "test",
+                                    user_id = "user_id_1",
+                                    username = "username_1",
+                                    uploaded_at = "2021-04-07T10:33:25.000Z")
+
+file_2 = DigitalFactoryFileResponse(client_id ="client_id_2",
+                                    content_type = "zomg",
+                                    file_name = "file_2.3mf",
+                                    file_id = "file_id_2",
+                                    library_project_id = "project_id_2",
+                                    status = "test",
+                                    user_id = "user_id_2",
+                                    username = "username_2",
+                                    uploaded_at = "2021-02-06T09:33:22.000Z")
+
+file_wtf = DigitalFactoryFileResponse(client_id ="client_id_1",
+                                      content_type = "zomg",
+                                      file_name = "file_3.wtf",
+                                      file_id = "file_id_3",
+                                      library_project_id = "project_id_1",
+                                      status = "test",
+                                      user_id = "user_id_1",
+                                      username = "username_1",
+                                      uploaded_at = "2021-04-06T12:33:25.000Z")
+
+
+def test_setFiles():
+    model = DigitalFactoryFileModel()
+
+    assert model.count == 0
+
+    model.setFiles([file_1, file_2])
+    assert model.count == 2
+
+    assert model.getItem(0)["fileName"] == "file_1.3mf"
+    assert model.getItem(1)["fileName"] == "file_2.3mf"
+
+
+def test_clearProjects():
+    model = DigitalFactoryFileModel()
+    model.setFiles([file_1, file_2])
+    model.clearFiles()
+    assert model.count == 0
+
+
+def test_setProjectMultipleTimes():
+    model = DigitalFactoryFileModel()
+    model.setFiles([file_1, file_2])
+    model.setFiles([file_2])
+    assert model.count == 1
+    assert model.getItem(0)["fileName"] == "file_2.3mf"
+
+
+def test_setFilter():
+    model = DigitalFactoryFileModel()
+
+    model.setFiles([file_1, file_2, file_wtf])
+    model.setFilters({"file_name": lambda x: Path(x).suffix[1:].lower() in ["3mf"]})
+    assert model.count == 2
+
+    model.clearFilters()
+    assert model.count == 3

plugins/DigitalLibrary/tests/TestDigitalFactoryProjectModel.py

@@ -0,0 +1,55 @@
+
+from src.DigitalFactoryProjectModel import DigitalFactoryProjectModel
+from src.DigitalFactoryProjectResponse import DigitalFactoryProjectResponse
+
+
+project_1 = DigitalFactoryProjectResponse(library_project_id = "omg",
+                                              display_name = "zomg",
+                                              username = "nope",
+                                              organization_shared = True)
+
+project_2 = DigitalFactoryProjectResponse(library_project_id = "omg2",
+                                              display_name = "zomg2",
+                                              username = "nope",
+                                              organization_shared = False)
+
+
+def test_setProjects():
+    model = DigitalFactoryProjectModel()
+
+    assert model.count == 0
+
+    model.setProjects([project_1, project_2])
+    assert model.count == 2
+
+    assert model.getItem(0)["displayName"] == "zomg"
+    assert model.getItem(1)["displayName"] == "zomg2"
+
+
+def test_clearProjects():
+    model = DigitalFactoryProjectModel()
+    model.setProjects([project_1, project_2])
+    model.clearProjects()
+    assert model.count == 0
+
+
+def test_setProjectMultipleTimes():
+    model = DigitalFactoryProjectModel()
+    model.setProjects([project_1, project_2])
+    model.setProjects([project_2])
+    assert model.count == 1
+    assert model.getItem(0)["displayName"] == "zomg2"
+
+
+def test_extendProjects():
+    model = DigitalFactoryProjectModel()
+
+    assert model.count == 0
+
+    model.setProjects([project_1])
+    assert model.count == 1
+
+    model.extendProjects([project_2])
+    assert model.count == 2
+    assert model.getItem(0)["displayName"] == "zomg"
+    assert model.getItem(1)["displayName"] == "zomg2"

plugins/DigitalLibrary/tests/TestDigitalLibraryApiClient.py

@@ -0,0 +1,89 @@
+# Copyright (c) 2021 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from unittest.mock import MagicMock
+
+import pytest
+
+from cura.CuraApplication import CuraApplication
+from src.DigitalFactoryApiClient import DigitalFactoryApiClient
+from src.PaginationManager import PaginationManager
+
+
+@pytest.fixture
+def application():
+    app = MagicMock(spec=CuraApplication, name = "Mocked Cura Application")
+    return app
+
+
+@pytest.fixture
+def pagination_manager():
+    manager = MagicMock(name = "Mocked Pagination Manager")
+    return manager
+
+
+@pytest.fixture
+def api_client(application, pagination_manager):
+    api_client = DigitalFactoryApiClient(application, MagicMock())
+    api_client._projects_pagination_mgr = pagination_manager
+    return api_client
+
+
+def test_getProjectsFirstPage(api_client):
+    # setup
+    http_manager = MagicMock()
+    api_client._http = http_manager
+    pagination_manager = api_client._projects_pagination_mgr
+    pagination_manager.limit = 20
+
+    finished_callback = MagicMock()
+    failed_callback = MagicMock()
+
+    # Call
+    api_client.getProjectsFirstPage(search_filter = "filter", on_finished = finished_callback, failed = failed_callback)
+
+    # Asserts
+    pagination_manager.reset.assert_called_once()  # Should be called since we asked for new set of projects
+    http_manager.get.assert_called_once()
+    args = http_manager.get.call_args_list[0]
+
+    # Ensure that it's called with the right limit
+    assert args[0][0] == "https://api.ultimaker.com/cura/v1/projects?limit=20&search=filter"
+
+    # Change the limit & try again
+    http_manager.get.reset_mock()
+    pagination_manager.limit = 80
+    api_client.getProjectsFirstPage(search_filter = "filter", on_finished = finished_callback, failed = failed_callback)
+    args = http_manager.get.call_args_list[0]
+
+    # Ensure that it's called with the right limit
+    assert args[0][0] == "https://api.ultimaker.com/cura/v1/projects?limit=80&search=filter"
+
+
+def test_getMoreProjects_noNewProjects(api_client):
+    api_client.hasMoreProjectsToLoad = MagicMock(return_value = False)
+    http_manager = MagicMock()
+    api_client._http = http_manager
+
+    finished_callback = MagicMock()
+    failed_callback = MagicMock()
+    api_client.getMoreProjects(finished_callback, failed_callback)
+
+    http_manager.get.assert_not_called()
+
+
+def test_getMoreProjects_hasNewProjects(api_client):
+    api_client.hasMoreProjectsToLoad = MagicMock(return_value = True)
+    http_manager = MagicMock()
+    api_client._http = http_manager
+
+    finished_callback = MagicMock()
+    failed_callback = MagicMock()
+    api_client.getMoreProjects(finished_callback, failed_callback)
+
+    http_manager.get.assert_called_once()
+
+
+def test_clear(api_client):
+    api_client.clear()
+    api_client._projects_pagination_mgr.reset.assert_called_once()

plugins/DigitalLibrary/tests/conftest.py

@@ -0,0 +1,5 @@
+
+# Ensure that the importing for all tests work
+import sys
+import os
+sys.path.append(os.path.join(os.path.dirname(os.path.abspath(__file__)), ".."))

plugins/FirmwareUpdateChecker/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.1",
     "description": "Checks for firmware updates.",
-    "api": "7.4.0",
+    "api": 7,
     "i18n-catalog": "cura"
 }

plugins/FirmwareUpdater/plugin.json

@@ -3,6 +3,6 @@
     "author": "Ultimaker B.V.",
     "version": "1.0.1",
     "description": "Provides a machine actions for updating firmware.",
-    "api": "7.4.0",
+    "api": 7,
     "i18n-catalog": "cura"
 }