Merge pull request #4 from dittonjs/jd/add-websockets

Jd/add websockets

4 files changed, 102 insertions, 0 deletions

diff --git a/server/app.module.ts b/server/app.module.ts
index d0135c1..bbc3c1c 100644
--- a/server/app.module.ts
+++ b/server/app.module.ts
@@ -4,6 +4,7 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 import { AppController } from './app.controller';
 import { config } from './database/config';
 import { UsersModule } from './modules/users.module';
+import { PingGateway } from './providers/gateways/ping.gateway';
 import { AuthGuard } from './providers/guards/auth.guard';
 import { RolesGuard } from './providers/guards/roles.guard';
 import { JwtService } from './providers/services/jwt.service';
@@ -15,6 +16,7 @@ import { GuardUtil } from './providers/util/guard.util';
   imports: [TypeOrmModule.forRoot(config), UsersModule],
   controllers: [AppController],
   providers: [
+    PingGateway,
     UsersService,
     RolesService,
     JwtService,
diff --git a/server/decorators/gateway_jwt_body.decorator.ts b/server/decorators/gateway_jwt_body.decorator.ts
new file mode 100644
index 0000000..c31b47e
--- /dev/null
+++ b/server/decorators/gateway_jwt_body.decorator.ts
@@ -0,0 +1,6 @@
+import { createParamDecorator, ExecutionContext } from '@nestjs/common';
+import { Socket } from 'socket.io';
+export const GatewayJwtBody = createParamDecorator((data: unknown, ctx: ExecutionContext) => {
+  const req = ctx.switchToHttp().getRequest() as Socket;
+  return req.handshake.auth.jwtBody;
+});
diff --git a/server/providers/gateways/ping.gateway.ts b/server/providers/gateways/ping.gateway.ts
new file mode 100644
index 0000000..27fe785
--- /dev/null
+++ b/server/providers/gateways/ping.gateway.ts
@@ -0,0 +1,67 @@
+import { UseGuards } from '@nestjs/common';
+import { ConnectedSocket, MessageBody, OnGatewayConnection, OnGatewayDisconnect, OnGatewayInit, SubscribeMessage, WebSocketGateway, WebSocketServer, WsException } from '@nestjs/websockets';
+import { GatewayJwtBody } from 'server/decorators/gateway_jwt_body.decorator';
+import { JwtBodyDto } from 'server/dto/jwt_body.dto';
+import { Server, Socket } from 'socket.io';
+import { GatewayAuthGuard } from '../guards/gatewayauth.guard';
+import { JwtService } from '../services/jwt.service';
+
+class JoinPayload {
+  currentRoom?: string;
+  newRoom: string;
+}
+
+class PingPayload {
+  currentRoom: string;
+}
+
+@WebSocketGateway()
+@UseGuards(GatewayAuthGuard)
+export class PingGateway implements OnGatewayInit, OnGatewayConnection, OnGatewayDisconnect {
+  @WebSocketServer()
+  server: Server;
+
+  constructor(private jwtService: JwtService) {}
+
+  afterInit(server: Server) {
+    console.log('Sockets initialized');
+  }
+
+  handleConnection(client: Socket) {
+    // you can do things like add users to rooms
+    // or emit events here.
+    // IMPORTANT! The GatewayAuthGuard doesn't trigger on these handlers
+    // if you need to do anything in this method you need to authenticate the JWT
+    // manually.
+    try {
+      const jwt = client.handshake.auth.token;
+      const jwtBody = this.jwtService.parseToken(jwt);
+      console.log(client.handshake.query);
+      console.log('Client Connected: ', jwtBody.userId);
+    } catch (e) {
+      throw new WsException('Invalid token');
+    }
+  }
+
+  handleDisconnect(client: Socket) {
+    console.log('Client Disconnected');
+  }
+
+  @SubscribeMessage('ping')
+  public handlePing(
+    @ConnectedSocket() client: Socket,
+    @MessageBody() payload: PingPayload,
+    @GatewayJwtBody() jwtBody: JwtBodyDto,
+  ) {
+    this.server.to(payload.currentRoom).emit('pong', { message: { userId: jwtBody.userId } });
+    console.log(client.rooms);
+  }
+
+  @SubscribeMessage('join-room')
+  public async joinRoom(client: Socket, payload: JoinPayload) {
+    console.log(payload);
+    payload.currentRoom && (await client.leave(payload.currentRoom));
+    await client.join(payload.newRoom);
+    return { msg: 'Joined room', room: payload.newRoom };
+  }
+}
diff --git a/server/providers/guards/gatewayauth.guard.ts b/server/providers/guards/gatewayauth.guard.ts
new file mode 100644
index 0000000..0843752
--- /dev/null
+++ b/server/providers/guards/gatewayauth.guard.ts
@@ -0,0 +1,27 @@
+import { Injectable, CanActivate, ExecutionContext } from '@nestjs/common';
+import { JwtService } from '../services/jwt.service';
+import { GuardUtil } from '../util/guard.util';
+import { Socket } from 'socket.io';
+import { WsException } from '@nestjs/websockets';
+
+@Injectable()
+export class GatewayAuthGuard implements CanActivate {
+  constructor(private guardUtil: GuardUtil, private jwtService: JwtService) {}
+
+  canActivate(context: ExecutionContext) {
+    // Handlers and Controllers can both skip this guard in the event that
+    if (this.guardUtil.shouldSkip(this, context)) {
+      return true;
+    }
+
+    const req = context.switchToHttp().getRequest() as Socket;
+    const jwt = req.handshake.auth.token;
+    if (!jwt) throw new WsException('Invalid auth token');
+    try {
+      req.handshake.auth.jwtBody = this.jwtService.parseToken(jwt);
+    } catch (e) {
+      throw new WsException('Invalid auth token');
+    }
+    return true;
+  }
+}