Add ignoring invite sender & fix forgotten rooms

When declining an invite, the popup now offers a checkbox to also add
the sender to the account data m.ignored_user_list event.

This will hide any further invite or message from that user in syncs,
and also immediatly remove the ones we currently have.

As a side-effect, the long-time bug that caused forgotten rooms to
immediatly reappear due to received a "<user> left" event has been
fixed.

src/backend/matrix_client.py

@@ -210,6 +210,7 @@ class MatrixClient(nio.AsyncClient):
         self.fully_loaded_rooms:   Set[str]       = set()  # {room_id}
         self.loaded_once_rooms:    Set[str]       = set()  # {room_id}
         self.cleared_events_rooms: Set[str]       = set()  # {room_id}
+        self.ignored_rooms:        Set[str]       = set()  # {room_id}
 
         self.event_to_echo_ids: Dict[str, str] = {}
 
@@ -220,7 +221,8 @@ class MatrixClient(nio.AsyncClient):
         self.unassigned_event_last_read_by: DefaultDict[str, Dict[str, int]] =\
             DefaultDict(dict)
 
-        self.push_rules: nio.PushRulesEvent = nio.PushRulesEvent()
+        self.push_rules:       nio.PushRulesEvent = nio.PushRulesEvent()
+        self.ignored_user_ids: Set[str]           = set()
 
         # {room_id: event}
         self.power_level_events: Dict[str, nio.PowerLevelsEvent] = {}
@@ -523,6 +525,51 @@ class MatrixClient(nio.AsyncClient):
             await asyncio.sleep(0.2)
 
 
+    async def ignore_user(self, user_id: str, ignore: bool) -> None:
+        ignored = self.ignored_user_ids.copy()
+
+        if ignore:
+            ignored.add(user_id)
+        else:
+            ignored.discard(user_id)
+
+        path   = ["user", self.user_id, "account_data", "m.ignored_user_list"]
+        params = {"access_token": self.access_token}
+
+        await self._send(
+            nio.responses.EmptyResponse,
+            "PUT",
+            nio.Api._build_path(path, params),
+            nio.Api.to_json({"ignored_users": {u: {} for u in ignored}}),
+        )
+
+        if not ignore:
+            return
+
+        # Invites and messages from ignored users won't be returned anymore on
+        # syncs, thus will be absent on client restart. Clean up immediatly:
+
+        room_model = self.models[self.user_id, "rooms"]
+
+        with room_model.batch_remove():
+            for room_id, room in room_model.copy().items():
+                if room.inviter_id == user_id:
+                    self.ignored_rooms.add(room_id)
+                    del room_model[room_id]
+                    self.models.pop((self.user_id, room_id, "events"), None)
+                    self.models.pop((self.user_id, room_id, "members"), None)
+                    continue
+
+                event_model = self.models[self.user_id, room_id, "events"]
+
+                with event_model.batch_remove():
+                    for event_id, event in event_model.copy().items():
+                        if event.sender_id == user_id:
+                            del event_model[event_id]
+
+        await self.update_account_unread_counts()
+
+
     async def can_kick(self, room_id: str, target_user_id: str) -> bool:
         """Return whether we can kick a certain user in a room."""
 
@@ -1172,6 +1219,7 @@ class MatrixClient(nio.AsyncClient):
         will be marked as suitable for destruction by the server.
         """
 
+        self.ignored_rooms.add(room_id)
         self.models[self.user_id, "rooms"].pop(room_id, None)
         self.models.pop((self.user_id, room_id, "events"), None)
         self.models.pop((self.user_id, room_id, "members"), None)
@@ -2057,6 +2105,8 @@ class MatrixClient(nio.AsyncClient):
     ) -> None:
         """Register/update a `nio.MatrixRoom` as a `models.items.Room`."""
 
+        self.ignored_rooms.discard(room.room_id)
+
         inviter        = getattr(room, "inviter", "") or ""
         levels         = room.power_levels
         can_send_state = partial(levels.can_user_send_state, self.user_id)

src/backend/nio_callbacks.py

@@ -65,7 +65,6 @@ class NioCallbacks:
                 self.client.add_to_device_callback(method, ev_class)
             elif issubclass(ev_class, nio.AccountDataEvent):
                 self.client.add_global_account_data_callback(method, ev_class)
-                self.client.add_room_account_data_callback(method, ev_class)
             elif issubclass(ev_class, nio.PresenceEvent):
                 self.client.add_presence_callback(method, ev_class)
             else:
@@ -99,6 +98,10 @@ class NioCallbacks:
 
         # TODO: way of knowing if a nio.MatrixRoom is left
         for room_id, info in resp.rooms.leave.items():
+            # We forgot this room or rejected an invite and ignored the sender
+            if room_id in self.client.ignored_rooms:
+                continue
+
             # TODO: handle in nio, these are rooms that were left before
             # starting the client.
             if room_id not in self.client.all_rooms:
@@ -853,6 +856,15 @@ class NioCallbacks:
         self.client.push_rules = ev
 
 
+    async def onUnknownAccountDataEvent(
+        self, ev: nio.UnknownAccountDataEvent,
+    ) -> None:
+
+        if ev.type == "m.ignored_user_list":
+            user_ids = set(ev.content.get("ignored_users", {}))
+            self.client.ignored_user_ids = user_ids
+
+
     # Presence event callbacks
 
     async def onPresenceEvent(self, ev: nio.PresenceEvent) -> None:

src/gui/Popups/LeaveRoomPopup.qml

@@ -16,7 +16,21 @@ HFlickableColumnPopup {
     property bool left: false
     property var leftCallback: null
 
+    function ignoreInviter() {
+        if (! inviterId) return
+        py.callClientCoro(userId, "ignore_user", [inviterId, true])
+    }
+
+    function leave() {
+        leaveButton.loading = true
+        py.callClientCoro(userId, "room_leave", [roomId], leftCallback)
+        if (ignoreInviterCheck.checked) popup.ignoreInviter()
+        popup.close()
+    }
+
     function forget() {
+        leaveButton.loading = true
+
         py.callClientCoro(userId, "room_forget", [roomId], () => {
             if (window.uiState.page === "Pages/Chat/Chat.qml" &&
                 window.uiState.pageProperties.userRoomId[0] === userId &&
@@ -24,15 +38,12 @@ HFlickableColumnPopup {
             {
                 window.mainUI.pageLoader.showPrevious() ||
                 window.mainUI.pageLoader.show("Pages/Default.qml")
-
-                Qt.callLater(popup.destroy)
             }
-        })
-    }
 
-    function leave() {
+            Qt.callLater(popup.destroy)
-        py.callClientCoro(userId, "room_leave", [roomId], leftCallback)
+        })
-        popup.close()
+
+        if (ignoreInviterCheck.checked) popup.ignoreInviter()
     }
 
     page.footer: AutoDirectionLayout {
@@ -78,15 +89,32 @@ HFlickableColumnPopup {
             )
     }
 
+    HCheckBox {
+        id: ignoreInviterCheck
+        visible: Boolean(popup.inviterId)
+        mainText.textFormat: HLabel.StyledText
+
+        // We purposely display inviter's user ID instead of display name here.
+        // Someone could take the name of one of our contact, which would
+        // not be disambiguated and lead to confusion.
+        text: qsTr("Ignore sender %1").arg(
+            utils.coloredNameHtml("", popup.inviterId),
+        )
+        subtitle.text: qsTr("Automatically hide their invites and messages")
+
+        Layout.fillWidth: true
+    }
+
     HCheckBox {
         id: forgetCheck
         visible: ! popup.left
         text: qsTr("Forget this room's history")
         subtitle.text: qsTr(
-            "You will lose access to any previously received messages.\n" +
+            "Access to previously received messages will be lost.\n" +
             "If all members forget a room, servers will erase it."
         )
 
         Layout.fillWidth: true
     }
+
 }