refactoring

Resolve #7779

packages/backend/src/server/api/stream/channels/messaging-index.ts

@@ -0,0 +1,16 @@
+import autobind from 'autobind-decorator';
+import Channel from '../channel';
+
+export default class extends Channel {
+	public readonly chName = 'messagingIndex';
+	public static shouldShare = true;
+	public static requireCredential = true;
+
+	@autobind
+	public async init(params: any) {
+		// Subscribe messaging index stream
+		this.subscriber.on(`messagingIndexStream:${this.user!.id}`, data => {
+			this.send(data);
+		});
+	}
+}