Add Install Pending Updates button to Account popup

CURA-7473

cura/API/Account.py

@@ -1,7 +1,7 @@
 # Copyright (c) 2018 Ultimaker B.V.
 # Cura is released under the terms of the LGPLv3 or higher.
 from datetime import datetime
-from typing import Optional, Dict, TYPE_CHECKING, Union
+from typing import Optional, Dict, TYPE_CHECKING, Callable
 
 from PyQt5.QtCore import QObject, pyqtSignal, pyqtSlot, pyqtProperty, QTimer, Q_ENUMS
 
@@ -56,6 +56,7 @@ class Account(QObject):
     lastSyncDateTimeChanged = pyqtSignal()
     syncStateChanged = pyqtSignal(int)  # because SyncState is an int Enum
     manualSyncEnabledChanged = pyqtSignal(bool)
+    updatePackagesEnabledChanged = pyqtSignal(bool)
 
     def __init__(self, application: "CuraApplication", parent = None) -> None:
         super().__init__(parent)
@@ -66,6 +67,8 @@ class Account(QObject):
         self._logged_in = False
         self._sync_state = SyncState.IDLE
         self._manual_sync_enabled = False
+        self._update_packages_enabled = False
+        self._update_packages_action = None  # type: Callable
         self._last_sync_str = "-"
 
         self._callback_port = 32118
@@ -143,6 +146,18 @@ class Account(QObject):
                 if not self._update_timer.isActive():
                     self._update_timer.start()
 
+    def setUpdatePackagesAction(self, action: Callable):
+        """ Set the callback which will be invoked when the user clicks the update packages button
+
+        Should be invoked after your service sets the sync state to SYNCING and before setting the
+        sync state to SUCCESS.
+
+        Action will be reset to None when the next sync starts
+        """
+        self._update_packages_action = action
+        self._update_packages_enabled = True
+        self.updatePackagesEnabledChanged.emit(self._update_packages_enabled)
+
     def _onAccessTokenChanged(self):
         self.accessTokenChanged.emit()
 
@@ -185,6 +200,9 @@ class Account(QObject):
         sync is currently running, a sync will be requested.
         """
 
+        self._update_packages_action = None
+        self._update_packages_enabled = False
+        self.updatePackagesEnabledChanged.emit(self._update_packages_enabled)
         if self._update_timer.isActive():
             self._update_timer.stop()
         elif self._sync_state == SyncState.SYNCING:
@@ -251,6 +269,10 @@ class Account(QObject):
     def manualSyncEnabled(self) -> bool:
         return self._manual_sync_enabled
 
+    @pyqtProperty(bool, notify=updatePackagesEnabledChanged)
+    def updatePackagesEnabled(self) -> bool:
+        return self._update_packages_enabled
+
     @pyqtSlot()
     @pyqtSlot(bool)
     def sync(self, user_initiated: bool = False) -> None:
@@ -259,11 +281,14 @@ class Account(QObject):
 
         self._sync()
 
+    @pyqtSlot()
+    def update_packages(self):
+        if self._update_packages_action is not None:
+            self._update_packages_action()
+
     @pyqtSlot()
     def popupOpened(self) -> None:
         self._setManualSyncEnabled(True)
-        self._sync_state = SyncState.IDLE
-        self.syncStateChanged.emit(self._sync_state)
 
     @pyqtSlot()
     def logout(self) -> None: