Gateways

The gateways in the class using the decorator previously seen contain all of the handlers that you need to provide the results of an event.

Nest.js comes with a decorator that allows you to access the server instance @WebSocketServer. You have to use it on a property of your class.

export class CommentGateway {  
    @WebSocketServer() server; 

    /* ... */
}

Also, throughout the gateway, you have access to the injection of injectable services. So, in order to have access of the comment data, inject the CommentService exported by the CommentModule, which has been injected into this module.

export class CommentGateway {
    /* ... */

    constructor(private readonly commentService: CommentService) { }

    /* ... */
}

The comment service allows you to return the appropriate result for the next handlers.

export class CommentGateway {
    /* ... */

    @SubscribeMessage('indexComment')
    async index(client, data): Promise<WsResponse<any>> {
      ...