Method constructor

packages/socket.io/lib/socket.ts:158–194

* Interface to a `Client` for a given `Namespace`. * * @param {Namespace} nsp * @param {Client} client * @param {Object} auth * @package

(
    readonly nsp: Namespace<ListenEvents, EmitEvents, ServerSideEvents>,
    readonly client: Client<ListenEvents, EmitEvents, ServerSideEvents>,
    auth: Record<string, unknown>,
    previousSession?: Session,
  )

   * @package
   */
  constructor(
    readonly nsp: Namespace<ListenEvents, EmitEvents, ServerSideEvents>,
    readonly client: Client<ListenEvents, EmitEvents, ServerSideEvents>,
    auth: Record<string, unknown>,
    previousSession?: Session,
  ) {
    super();
    this.server = nsp.server;
    this.adapter = nsp.adapter;
    if (previousSession) {
      this.id = previousSession.sid;
      this.pid = previousSession.pid;
      previousSession.rooms.forEach((room) => this.join(room));
      this.data = previousSession.data as SocketData;
      previousSession.missedPackets.forEach((packet) => {
        this.packet({
          type: PacketType.EVENT,
          data: packet,
        });
      });
      this.recovered = true;
    } else {
      if (client.conn.protocol === 3) {
        // @ts-ignore
        this.id = nsp.name !== "/" ? nsp.name + "#" + client.id : client.id;
      } else {
        this.id = base64id.generateId(); // don't reuse the Engine.IO id because it's sensitive information
      }
      if (this.server._opts.connectionStateRecovery) {
        this.pid = base64id.generateId();
      }
    }
    this.handshake = this.buildHandshake(auth);

    // prevents crash when the socket receives an "error" event without listener
    this.on("error", noop);
  }

  /**
   * Builds the `handshake` BC object