Refactor the create backup implementation to CreateBackupJob

plugins/CuraDrive/src/CreateBackupJob.py

@@ -0,0 +1,122 @@
+# Copyright (c) 2018 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+import json
+import threading
+from typing import Any, Dict, Optional
+
+from PyQt5.QtNetwork import QNetworkReply, QNetworkRequest
+from datetime import datetime
+
+from UM.Job import Job
+from UM.Logger import Logger
+from UM.Message import Message
+from UM.TaskManagement.HttpRequestManager import HttpRequestManager
+from UM.TaskManagement.HttpRequestScope import JsonDecoratorScope
+
+from UM.i18n import i18nCatalog
+from cura.CuraApplication import CuraApplication
+from plugins.Toolbox.src.UltimakerCloudScope import UltimakerCloudScope
+
+catalog = i18nCatalog("cura")
+
+
+class CreateBackupJob(Job):
+    """Creates backup zip, requests upload url and uploads the backup file to cloud storage."""
+
+    MESSAGE_TITLE = catalog.i18nc("@info:title", "Backups")
+
+    def __init__(self, api_backup_url: str) -> None:
+        """ Create a new backup Job. start the job by calling start()
+
+        :param api_backup_url: The url of the 'backups' endpoint of the Cura Drive Api
+        """
+
+        super().__init__()
+
+        self._api_backup_url = api_backup_url
+        self._jsonCloudScope = JsonDecoratorScope(UltimakerCloudScope(CuraApplication.getInstance()))
+
+
+        self._backup_zip = None
+        self._upload_success = False
+        self._upload_success_available = threading.Event()
+        self.backup_upload_error_message = ""
+
+    def run(self) -> None:
+        upload_message = Message(catalog.i18nc("@info:backup_status", "Creating your backup..."), title = self.MESSAGE_TITLE, progress = -1)
+        upload_message.show()
+        CuraApplication.getInstance().processEvents()
+        cura_api = CuraApplication.getInstance().getCuraAPI()
+        self._backup_zip, backup_meta_data = cura_api.backups.createBackup()
+
+        if not self._backup_zip or not backup_meta_data:
+            self.backup_upload_error_message = "Could not create backup."
+            upload_message.hide()
+            return
+
+        upload_message.setText(catalog.i18nc("@info:backup_status", "Uploading your backup..."))
+        CuraApplication.getInstance().processEvents()
+
+        # Create an upload entry for the backup.
+        timestamp = datetime.now().isoformat()
+        backup_meta_data["description"] = "{}.backup.{}.cura.zip".format(timestamp, backup_meta_data["cura_release"])
+        self._requestUploadSlot(backup_meta_data, len(self._backup_zip))
+
+        self._upload_success_available.wait()
+        upload_message.hide()
+
+    def _requestUploadSlot(self, backup_metadata: Dict[str, Any], backup_size: int) -> None:
+        """Request a backup upload slot from the API.
+
+        :param backup_metadata: A dict containing some meta data about the backup.
+        :param backup_size: The size of the backup file in bytes.
+        :return: The upload URL for the actual backup file if successful, otherwise None.
+        """
+
+        payload = json.dumps({"data": {"backup_size": backup_size,
+                                       "metadata": backup_metadata
+                                       }
+                              }).encode()
+
+        HttpRequestManager.getInstance().put(
+            self._api_backup_url,
+            data = payload,
+            callback = self._onUploadSlotCompleted,
+            error_callback = self._onUploadSlotCompleted,
+            scope = self._jsonCloudScope)
+
+    def _onUploadSlotCompleted(self, reply: QNetworkReply, error: Optional["QNetworkReply.NetworkError"] = None) -> None:
+        if error is not None:
+            Logger.warning(str(error))
+            self.backup_upload_error_message = "Could not upload backup."
+            self._upload_success_available.set()
+            return
+        if reply.attribute(QNetworkRequest.HttpStatusCodeAttribute) >= 300:
+            Logger.warning("Could not request backup upload: %s", HttpRequestManager.readText(reply))
+            self.backup_upload_error_message = "Could not upload backup."
+            self._upload_success_available.set()
+            return
+
+        backup_upload_url = HttpRequestManager.readJSON(reply)["data"]["upload_url"]
+
+        # Upload the backup to storage.
+        HttpRequestManager.getInstance().put(
+            backup_upload_url,
+            data=self._backup_zip,
+            callback=self._uploadFinishedCallback,
+            error_callback=self._uploadFinishedCallback
+        )
+
+    def _uploadFinishedCallback(self, reply: QNetworkReply, error: QNetworkReply.NetworkError = None):
+        self.backup_upload_error_text = HttpRequestManager.readText(reply)
+
+        if HttpRequestManager.replyIndicatesSuccess(reply, error):
+            self._upload_success = True
+            Message(catalog.i18nc("@info:backup_status", "Your backup has finished uploading."), title = self.MESSAGE_TITLE).show()
+        else:
+            self.backup_upload_error_text = self.backup_upload_error_text
+            Logger.log("w", "Could not upload backup file: %s", self.backup_upload_error_text)
+            Message(catalog.i18nc("@info:backup_status", "There was an error while uploading your backup."),
+                    title=self.MESSAGE_TITLE).show()
+
+        self._upload_success_available.set()