fix(platform-ws): trigger client disconnected hook nestjs#2226

Author: kamilmysliwiec

packages/platform-ws/adapters/ws-adapter.ts

@@ -55,7 +55,10 @@ export class WsAdapter extends AbstractWsAdapter {
     handlers: MessageMappingProperties[],
     transform: (data: any) => Observable<any>,
   ) {
-    const close$ = fromEvent(client, CLOSE_EVENT).pipe(share(), first());
+    const close$ = fromEvent(client, CLOSE_EVENT).pipe(
+      share(),
+      first(),
+    );
     const source$ = fromEvent(client, 'message').pipe(
       mergeMap(data =>
         this.bindMessageHandler(data, handlers, transform).pipe(
@@ -97,4 +100,8 @@ export class WsAdapter extends AbstractWsAdapter {
     server.on(ERROR_EVENT, (err: any) => this.logger.error(err));
     return server;
   }
+
+  public bindClientDisconnect(client: any, callback: Function) {
+    client.on(CLOSE_EVENT, callback);
+  }
 }

sample/03-microservices/src/math/math.module.ts

@@ -3,6 +3,7 @@ import { Transport } from '@nestjs/common/enums/transport.enum';
 import { ClientsModule } from '@nestjs/microservices';
 import { MATH_SERVICE } from './math.constants';
 import { MathController } from './math.controller';
+
 @Module({
   imports: [
     ClientsModule.register([{ name: MATH_SERVICE, transport: Transport.TCP }]),