refactoring

Resolve #7779

packages/backend/src/server/api/streaming.ts

@@ -0,0 +1,67 @@
+import * as http from 'http';
+import * as websocket from 'websocket';
+
+import MainStreamConnection from './stream/index';
+import { ParsedUrlQuery } from 'querystring';
+import authenticate from './authenticate';
+import { EventEmitter } from 'events';
+import { subsdcriber as redisClient } from '../../db/redis';
+import { Users } from '@/models/index';
+
+module.exports = (server: http.Server) => {
+	// Init websocket server
+	const ws = new websocket.server({
+		httpServer: server
+	});
+
+	ws.on('request', async (request) => {
+		const q = request.resourceURL.query as ParsedUrlQuery;
+
+		// TODO: トークンが間違ってるなどしてauthenticateに失敗したら
+		// コネクション切断するなりエラーメッセージ返すなりする
+		// (現状はエラーがキャッチされておらずサーバーのログに流れて邪魔なので)
+		const [user, app] = await authenticate(q.i as string);
+
+		if (user?.isSuspended) {
+			request.reject(400);
+			return;
+		}
+
+		const connection = request.accept();
+
+		const ev = new EventEmitter();
+
+		async function onRedisMessage(_: string, data: string) {
+			const parsed = JSON.parse(data);
+			ev.emit(parsed.channel, parsed.message);
+		}
+
+		redisClient.on('message', onRedisMessage);
+
+		const main = new MainStreamConnection(connection, ev, user, app);
+
+		const intervalId = user ? setInterval(() => {
+			Users.update(user.id, {
+				lastActiveDate: new Date(),
+			});
+		}, 1000 * 60 * 5) : null;
+		if (user) {
+			Users.update(user.id, {
+				lastActiveDate: new Date(),
+			});
+		}
+
+		connection.once('close', () => {
+			ev.removeAllListeners();
+			main.dispose();
+			redisClient.off('message', onRedisMessage);
+			if (intervalId) clearInterval(intervalId);
+		});
+
+		connection.on('message', async (data) => {
+			if (data.utf8Data === 'ping') {
+				connection.send('pong');
+			}
+		});
+	});
+};