show when e2ee is enabled in timeline

src/domain/session/room/timeline/tiles/EncryptionEnabledTile.js

@@ -0,0 +1,28 @@
+/*
+Copyright 2020 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 {SimpleTile} from "./SimpleTile.js";
+
+export class EncryptionEnabledTile extends SimpleTile {
+    get shape() {
+        return "announcement";
+    }
+
+    get announcement() {
+        const senderName =  this._entry.displayName || this._entry.sender;
+        return this.i18n`${senderName} has enabled end-to-end encryption`;
+    }
+}

src/domain/session/room/timeline/tilesCreator.js

@@ -21,6 +21,7 @@ import {LocationTile} from "./tiles/LocationTile.js";
 import {RoomNameTile} from "./tiles/RoomNameTile.js";
 import {RoomMemberTile} from "./tiles/RoomMemberTile.js";
 import {EncryptedEventTile} from "./tiles/EncryptedEventTile.js";
+import {EncryptionEnabledTile} from "./tiles/EncryptionEnabledTile.js";
 
 export function tilesCreator({room, ownUserId, clock}) {
     return function tilesCreator(entry, emitUpdate) {
@@ -53,6 +54,8 @@ export function tilesCreator({room, ownUserId, clock}) {
                     return new RoomMemberTile(options);
                 case "m.room.encrypted":
                     return new EncryptedEventTile(options);
+                case "m.room.encryption":
+                    return new EncryptionEnabledTile(options);
                 default:
                     // unknown type not rendered
                     return null;