Disable refresh button while API call is in progress

securedrop_client/gui/widgets.py

@@ -67,6 +67,8 @@ def setup(self, window, controller):
         self.window = window
         self.controller = controller
 
+        self.controller.sync_events.connect(self._on_sync_event)
+
     def set_logged_in_as(self, username):
         """
         Update the UI to reflect that the user is logged in as "username".
@@ -103,6 +105,12 @@ def on_refresh_clicked(self):
         """
         self.controller.sync_api()
 
+    def _on_sync_event(self, data):
+        """
+        Called when the refresh call completes
+        """
+        self.refresh.setEnabled(data != 'syncing')
+
 
 class MainView(QWidget):
     """

securedrop_client/logic.py

@@ -89,6 +89,8 @@ class Client(QObject):
     application, this is the controller.
     """
 
+    sync_events = pyqtSignal(str)
+
     def __init__(self, hostname, gui, session,
                  home: str, proxy: bool = True) -> None:
         """
@@ -345,6 +347,7 @@ def sync_api(self):
         """
         logger.debug("In sync_api on thread {}".format(
             self.thread().currentThreadId()))
+        self.sync_events.emit('syncing')
 
         if self.authenticated():
             logger.debug("You are authenticated, going to make your call")
@@ -367,6 +370,7 @@ def on_synced(self, result):
         """
         Called when syncronisation of data via the API is complete.
         """
+        self.sync_events.emit('synced')
         if isinstance(result, tuple):
             remote_sources, remote_submissions, remote_replies = \
                 result

tests/gui/test_widgets.py

@@ -96,6 +96,17 @@ def test_ToolBar_on_refresh_clicked():
     tb.controller.sync_api.assert_called_once_with()
 
 
+def test_ToolBar_sync_event():
+    """Toggles refresh button when syncing
+    """
+    tb = ToolBar(None)
+    tb._on_sync_event('syncing')
+    assert not tb.refresh.isEnabled()
+
+    tb._on_sync_event('synced')
+    assert tb.refresh.isEnabled()
+
+
 def test_MainView_init():
     """
     Ensure the MainView instance is correctly set up.