refactoring

Resolve #7779

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

@@ -0,0 +1,106 @@
+import autobind from 'autobind-decorator';
+import { readUserMessagingMessage, readGroupMessagingMessage, deliverReadActivity } from '../../common/read-messaging-message';
+import Channel from '../channel';
+import { UserGroupJoinings, Users, MessagingMessages } from '@/models/index';
+import { User, ILocalUser, IRemoteUser } from '@/models/entities/user';
+import { UserGroup } from '@/models/entities/user-group';
+import { StreamMessages } from '../types';
+
+export default class extends Channel {
+	public readonly chName = 'messaging';
+	public static shouldShare = false;
+	public static requireCredential = true;
+
+	private otherpartyId: string | null;
+	private otherparty: User | null;
+	private groupId: string | null;
+	private subCh: `messagingStream:${User['id']}-${User['id']}` | `messagingStream:${UserGroup['id']}`;
+	private typers: Record<User['id'], Date> = {};
+	private emitTypersIntervalId: ReturnType<typeof setInterval>;
+
+	@autobind
+	public async init(params: any) {
+		this.otherpartyId = params.otherparty;
+		this.otherparty = this.otherpartyId ? await Users.findOneOrFail({ id: this.otherpartyId }) : null;
+		this.groupId = params.group;
+
+		// Check joining
+		if (this.groupId) {
+			const joining = await UserGroupJoinings.findOne({
+				userId: this.user!.id,
+				userGroupId: this.groupId
+			});
+
+			if (joining == null) {
+				return;
+			}
+		}
+
+		this.emitTypersIntervalId = setInterval(this.emitTypers, 5000);
+
+		this.subCh = this.otherpartyId
+			? `messagingStream:${this.user!.id}-${this.otherpartyId}`
+			: `messagingStream:${this.groupId}`;
+
+		// Subscribe messaging stream
+		this.subscriber.on(this.subCh, this.onEvent);
+	}
+
+	@autobind
+	private onEvent(data: StreamMessages['messaging']['payload'] | StreamMessages['groupMessaging']['payload']) {
+		if (data.type === 'typing') {
+			const id = data.body;
+			const begin = this.typers[id] == null;
+			this.typers[id] = new Date();
+			if (begin) {
+				this.emitTypers();
+			}
+		} else {
+			this.send(data);
+		}
+	}
+
+	@autobind
+	public onMessage(type: string, body: any) {
+		switch (type) {
+			case 'read':
+				if (this.otherpartyId) {
+					readUserMessagingMessage(this.user!.id, this.otherpartyId, [body.id]);
+
+					// リモートユーザーからのメッセージだったら既読配信
+					if (Users.isLocalUser(this.user!) && Users.isRemoteUser(this.otherparty!)) {
+						MessagingMessages.findOne(body.id).then(message => {
+							if (message) deliverReadActivity(this.user as ILocalUser, this.otherparty as IRemoteUser, message);
+						});
+					}
+				} else if (this.groupId) {
+					readGroupMessagingMessage(this.user!.id, this.groupId, [body.id]);
+				}
+				break;
+		}
+	}
+
+	@autobind
+	private async emitTypers() {
+		const now = new Date();
+
+		// Remove not typing users
+		for (const [userId, date] of Object.entries(this.typers)) {
+			if (now.getTime() - date.getTime() > 5000) delete this.typers[userId];
+		}
+
+		const users = await Users.packMany(Object.keys(this.typers), null, { detail: false });
+
+		this.send({
+			type: 'typers',
+			body: users,
+		});
+	}
+
+	@autobind
+	public dispose() {
+		this.subscriber.off(this.subCh, this.onEvent);
+
+		clearInterval(this.emitTypersIntervalId);
+	}
+}