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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';
import { UsersService } from '../services/users.service';
@WebSocketGateway()
@UseGuards(GatewayAuthGuard)
export class ChatRoomGateway implements OnGatewayInit, OnGatewayConnection, OnGatewayDisconnect {
@WebSocketServer()
server: Server;
constructor(private jwtService: JwtService, private userService: UsersService) {}
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);
const chatRoomId = client.handshake.query.chatRoomId;
console.log('Client Connected: ', jwtBody.userId);
client.join(chatRoomId);
} catch (e) {
throw new WsException('Invalid token');
}
}
handleDisconnect(client: Socket) {
console.log('Client Disconnected');
}
@SubscribeMessage('message')
public async handleMessage(
@ConnectedSocket() client: Socket,
@MessageBody() data: string,
@GatewayJwtBody() jwtBody: JwtBodyDto,
) {
const user = await this.userService.find(jwtBody.userId);
this.server.to(client.handshake.query.chatRoomId).emit('new-message', {
id: user.id * Math.random() * 2048 * Date.now(),
content: data,
userName: `${user.firstName} ${user.lastName}`,
userId: user.id,
});
}
}
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