Fix re-connecting after network comes back

plugins/UM3NetworkPrinting/src/Cloud/CloudOutputDevice.py

@@ -40,8 +40,9 @@ I18N_CATALOG = i18nCatalog("cura")
 #   Note that this device represents a single remote cluster, not a list of multiple clusters.
 class CloudOutputDevice(UltimakerNetworkedPrinterOutputDevice):
 
-    # The interval with which the remote clusters are checked
-    CHECK_CLUSTER_INTERVAL = 10.0  # seconds
+    # The interval with which the remote cluster is checked.
+    # We can do this relatively often as this API call is quite fast.
+    CHECK_CLUSTER_INTERVAL = 8.0  # seconds
 
     # The minimum version of firmware that support print job actions over cloud.
     PRINT_JOB_ACTIONS_MIN_VERSION = Version("5.3.0")

plugins/UM3NetworkPrinting/src/Cloud/CloudOutputDeviceManager.py

@@ -43,6 +43,7 @@ class CloudOutputDeviceManager:
         self._update_timer = QTimer()
         self._update_timer.setInterval(int(self.CHECK_CLUSTER_INTERVAL * 1000))
         self._update_timer.setSingleShot(False)
+        self._update_timer.timeout.connect(self._getRemoteClusters)
 
         # Ensure we don't start twice.
         self._running = False
@@ -57,7 +58,6 @@ class CloudOutputDeviceManager:
         if not self._update_timer.isActive():
             self._update_timer.start()
         self._getRemoteClusters()
-        self._update_timer.timeout.connect(self._getRemoteClusters)
 
     ## Stops running the cloud output device manager.
     def stop(self):
@@ -67,7 +67,6 @@ class CloudOutputDeviceManager:
         if self._update_timer.isActive():
             self._update_timer.stop()
         self._onGetRemoteClustersFinished([])  # Make sure we remove all cloud output devices.
-        self._update_timer.timeout.disconnect(self._getRemoteClusters)
 
     ## Force refreshing connections.
     def refreshConnections(self) -> None:

plugins/UM3NetworkPrinting/src/UltimakerNetworkedPrinterOutputDevice.py

@@ -27,6 +27,9 @@ from .Models.Http.ClusterPrintJobStatus import ClusterPrintJobStatus
 #  This base class primarily contains all the Qt properties and slots needed for the monitor page to work.
 class UltimakerNetworkedPrinterOutputDevice(NetworkedPrinterOutputDevice):
     
+    META_NETWORK_KEY = "um_network_key"
+    META_CLUSTER_ID = "um_cloud_cluster_id"
+
     # Signal emitted when the status of the print jobs for this cluster were changed over the network.
     printJobsChanged = pyqtSignal()
 
@@ -195,6 +198,8 @@ class UltimakerNetworkedPrinterOutputDevice(NetworkedPrinterOutputDevice):
 
     ## Check if we're still connected by comparing the last timestamps for network response and the current time.
     #  This implementation is similar to the base NetworkedPrinterOutputDevice, but is tweaked slightly.
+    #  Re-connecting is handled automatically by the output device managers in this plugin.
+    #  TODO: it would be nice to have this logic in the managers, but connecting those with signals causes crashes.
     def _checkStillConnected(self) -> None:
         time_since_last_response = time() - self._time_of_last_response
         if time_since_last_response > self.NETWORK_RESPONSE_CONSIDER_OFFLINE:
@@ -202,8 +207,23 @@ class UltimakerNetworkedPrinterOutputDevice(NetworkedPrinterOutputDevice):
             if self.key in CuraApplication.getInstance().getOutputDeviceManager().getOutputDeviceIds():
                 CuraApplication.getInstance().getOutputDeviceManager().removeOutputDevice(self.key)
         elif self.connectionState == ConnectionState.Closed:
-            self.setConnectionState(ConnectionState.Connected)
-            if self.key not in CuraApplication.getInstance().getOutputDeviceManager().getOutputDeviceIds():
+            self._reconnectForActiveMachine()
+
+    ## Reconnect for the active output device.
+    #  Does nothing if the device is not meant for the active machine.
+    def _reconnectForActiveMachine(self) -> None:
+        active_machine = CuraApplication.getInstance().getGlobalContainerStack()
+        if not active_machine:
+            return
+
+        # Try for local network device.
+        stored_device_id = active_machine.getMetaDataEntry(self.META_NETWORK_KEY)
+        if self.key == stored_device_id:
+            CuraApplication.getInstance().getOutputDeviceManager().addOutputDevice(self)
+
+        # Try for cloud device.
+        stored_cluster_id = active_machine.getMetaDataEntry(self.META_CLUSTER_ID)
+        if self.key == stored_cluster_id:
             CuraApplication.getInstance().getOutputDeviceManager().addOutputDevice(self)
 
     def _responseReceived(self) -> None: