Show thread notification if thread timeline is closed (#9495)

* Show thread notification if thread timeline is closed

* Simplify isViewingEventTimeline statement

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix show desktop notifications

* Add RoomViewStore thread id assertions

* Add Notifier tests

* fix lint

* Remove it.only

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

src/dispatcher/actions.ts

@@ -116,6 +116,11 @@ export enum Action {
      */
     ViewRoom = "view_room",
 
+    /**
+     * Changes thread based on payload parameters. Should be used with ThreadPayload.
+     */
+    ViewThread = "view_thread",
+
     /**
      * Changes room based on room list order and payload parameters. Should be used with ViewRoomDeltaPayload.
      */

src/dispatcher/payloads/ThreadPayload.ts

@@ -0,0 +1,26 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { ActionPayload } from "../payloads";
+import { Action } from "../actions";
+
+/* eslint-disable camelcase */
+export interface ThreadPayload extends Pick<ActionPayload, "action"> {
+    action: Action.ViewThread;
+
+    thread_id: string | null;
+}
+/* eslint-enable camelcase */