Properly check power levels before allowing kick

src/backend/matrix_client.py

@@ -306,6 +306,20 @@ class MatrixClient(nio.AsyncClient):
         return (await self.content_repository_config()).upload_size
 
 
+    async def can_kick(self, room_id: str, target_user_id: str) -> bool:
+        """Return whether we can kick a certain user in a room."""
+
+        levels = self.all_rooms[room_id].power_levels
+        return levels.can_user_kick(self.user_id, target_user_id)
+
+
+    async def can_ban(self, room_id: str, target_user_id: str) -> bool:
+        """Return whether we can ban/unbun a certain user in a room."""
+
+        levels = self.all_rooms[room_id].power_levels
+        return levels.can_user_ban(self.user_id, target_user_id)
+
+
     @property
     def all_rooms(self) -> Dict[str, nio.MatrixRoom]:
         """Return dict containing both our joined and invited rooms."""

src/gui/Pages/Chat/RoomPane/MemberDelegate.qml

@@ -57,7 +57,7 @@ HTileDelegate {
             icon.name: "room-kick"
             icon.color: theme.colors.negativeBackground
             text: model.invited ? qsTr("Disinvite") : qsTr("Kick")
-            enabled: chat.roomInfo.can_kick
+            enabled: false
 
             popup: "Popups/KickPopup.qml"
             popupParent: chat
@@ -68,6 +68,13 @@ HTileDelegate {
                 targetDisplayName: model.display_name,
                 targetIsInvited: model.invited,
             })
+
+            Component.onCompleted: py.callClientCoro(
+                chat.userId,
+                "can_kick",
+                [chat.roomId, model.id],
+                can => { enabled = can },
+            )
         }
     }