Revert "Merge pull request #5726 from Ultimaker/CL-1331_use_API_for_UM3NetworkPrinting"

This reverts commit bec7b6546d, reversing
changes made to 7094b222b1.

The changes there were not accepted. Please see pull request https://github.com/Ultimaker/Cura/pull/5726 for the discussion about this.

Conflicts:
	plugins/UM3NetworkPrinting/src/UM3OutputDevicePlugin.py -> Just in one TODO comment.

plugins/UM3NetworkPrinting/src/DiscoverUM3Action.py

@@ -34,10 +34,7 @@ class DiscoverUM3Action(MachineAction):
 
         self.__additional_components_view = None #type: Optional[QObject]
 
-        self._application = CuraApplication.getInstance()
-        self._api = self._application.getCuraAPI()
-
-        self._application.engineCreatedSignal.connect(self._createAdditionalComponentsView)
+        CuraApplication.getInstance().engineCreatedSignal.connect(self._createAdditionalComponentsView)
 
         self._last_zero_conf_event_time = time.time() #type: float
 
@@ -53,7 +50,7 @@ class DiscoverUM3Action(MachineAction):
     def startDiscovery(self):
         if not self._network_plugin:
             Logger.log("d", "Starting device discovery.")
-            self._network_plugin = self._application.getOutputDeviceManager().getOutputDevicePlugin("UM3NetworkPrinting")
+            self._network_plugin = CuraApplication.getInstance().getOutputDeviceManager().getOutputDevicePlugin("UM3NetworkPrinting")
             self._network_plugin.discoveredDevicesChanged.connect(self._onDeviceDiscoveryChanged)
             self.discoveredDevicesChanged.emit()
 
@@ -108,27 +105,63 @@ class DiscoverUM3Action(MachineAction):
         else:
             return []
 
-    @pyqtSlot()
-    def refreshConnections(self) -> None:
+    @pyqtSlot(str)
+    def setGroupName(self, group_name: str) -> None:
+        Logger.log("d", "Attempting to set the group name of the active machine to %s", group_name)
+        global_container_stack = CuraApplication.getInstance().getGlobalContainerStack()
+        if global_container_stack:
+            # Update a GlobalStacks in the same group with the new group name.
+            group_id = global_container_stack.getMetaDataEntry("group_id")
+            machine_manager = CuraApplication.getInstance().getMachineManager()
+            for machine in machine_manager.getMachinesInGroup(group_id):
+                machine.setMetaDataEntry("group_name", group_name)
+
+            # Set the default value for "hidden", which is used when you have a group with multiple types of printers
+            global_container_stack.setMetaDataEntry("hidden", False)
+
         if self._network_plugin:
+            # Ensure that the connection states are refreshed.
             self._network_plugin.refreshConnections()
 
-    # TODO: Improve naming
-    # TODO: CHANGE TO HOSTNAME
+    # Associates the currently active machine with the given printer device. The network connection information will be
+    # stored into the metadata of the currently active machine.
+    @pyqtSlot(QObject)
+    def associateActiveMachineWithPrinterDevice(self, printer_device: Optional["PrinterOutputDevice"]) -> None:
+        if self._network_plugin:
+            self._network_plugin.associateActiveMachineWithPrinterDevice(printer_device)
+
+    @pyqtSlot(result = str)
+    def getStoredKey(self) -> str:
+        global_container_stack = CuraApplication.getInstance().getGlobalContainerStack()
+        if global_container_stack:
+            meta_data = global_container_stack.getMetaData()
+            if "um_network_key" in meta_data:
+                return global_container_stack.getMetaDataEntry("um_network_key")
+
+        return ""
+
     @pyqtSlot(result = str)
     def getLastManualEntryKey(self) -> str:
         if self._network_plugin:
             return self._network_plugin.getLastManualDevice()
         return ""
 
-    # TODO: Better naming needed. Exists where? On the current machine? On all machines?
-    # TODO: CHANGE TO HOSTNAME
     @pyqtSlot(str, result = bool)
     def existsKey(self, key: str) -> bool:
         metadata_filter = {"um_network_key": key}
         containers = CuraContainerRegistry.getInstance().findContainerStacks(type="machine", **metadata_filter)
         return bool(containers)
 
+    @pyqtSlot()
+    def loadConfigurationFromPrinter(self) -> None:
+        machine_manager = CuraApplication.getInstance().getMachineManager()
+        hotend_ids = machine_manager.printerOutputDevices[0].hotendIds
+        for index in range(len(hotend_ids)):
+            machine_manager.printerOutputDevices[0].hotendIdChanged.emit(index, hotend_ids[index])
+        material_ids = machine_manager.printerOutputDevices[0].materialIds
+        for index in range(len(material_ids)):
+            machine_manager.printerOutputDevices[0].materialIdChanged.emit(index, material_ids[index])
+
     def _createAdditionalComponentsView(self) -> None:
         Logger.log("d", "Creating additional ui components for UM3.")
 
@@ -137,10 +170,10 @@ class DiscoverUM3Action(MachineAction):
         if not plugin_path:
             return
         path = os.path.join(plugin_path, "resources/qml/UM3InfoComponents.qml")
-        self.__additional_components_view = self._application.createQmlComponent(path, {"manager": self})
+        self.__additional_components_view = CuraApplication.getInstance().createQmlComponent(path, {"manager": self})
         if not self.__additional_components_view:
             Logger.log("w", "Could not create ui components for UM3.")
             return
 
         # Create extra components
-        self._application.addAdditionalComponent("monitorButtons", self.__additional_components_view.findChild(QObject, "networkPrinterConnectButton"))
+        CuraApplication.getInstance().addAdditionalComponent("monitorButtons", self.__additional_components_view.findChild(QObject, "networkPrinterConnectButton"))