refactor(server): make redis required module (#9121)

packages/backend/server/src/base/websocket/adapter.ts

@@ -0,0 +1,56 @@
+import { INestApplication } from '@nestjs/common';
+import { IoAdapter } from '@nestjs/platform-socket.io';
+import { createAdapter } from '@socket.io/redis-adapter';
+import { Server } from 'socket.io';
+
+import { Config } from '../config';
+import { AuthenticationRequired } from '../error';
+import { SocketIoRedis } from '../redis';
+import { WEBSOCKET_OPTIONS } from './options';
+
+export class SocketIoAdapter extends IoAdapter {
+  constructor(private readonly app: INestApplication) {
+    super(app);
+  }
+
+  override createIOServer(port: number, options?: any): Server {
+    const config = this.app.get(WEBSOCKET_OPTIONS) as Config['websocket'];
+    const server: Server = super.createIOServer(port, {
+      ...config,
+      ...options,
+    });
+
+    if (config.canActivate) {
+      server.use((socket, next) => {
+        // @ts-expect-error checked
+        config
+          .canActivate(socket)
+          .then(pass => {
+            if (pass) {
+              next();
+            } else {
+              throw new AuthenticationRequired();
+            }
+          })
+          .catch(e => {
+            next(e);
+          });
+      });
+    }
+
+    const pubClient = this.app.get(SocketIoRedis);
+
+    pubClient.on('error', err => {
+      console.error(err);
+    });
+
+    const subClient = pubClient.duplicate();
+    subClient.on('error', err => {
+      console.error(err);
+    });
+
+    server.adapter(createAdapter(pubClient, subClient));
+
+    return server;
+  }
+}