Implement broadcast message preview (#9762)

src/utils/event/getSenderName.ts

@@ -0,0 +1,23 @@
+/*
+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 { MatrixEvent } from "matrix-js-sdk/src/matrix";
+
+import { _t } from "../../languageHandler";
+
+export function getSenderName(event: MatrixEvent): string {
+    return event.sender?.name ?? event.getSender() ?? _t("Someone");
+}