import { SpecialPropertyMessage } from '../messages/SpecialPropertyMessage';
import { ClientSpecialProperty } from './ClientSpecialProperty';

export type ClientEventHandler = (data: any) => void;

export class ClientEvent implements ClientSpecialProperty {

  public action: any;

  private listeners = new Set<ClientEventHandler>();

  public subscribe(cb: ClientEventHandler): void {
    this.listeners.add(cb);
  }

  public unsubscribe(cb: ClientEventHandler): boolean {
    return this.listeners.delete(cb);
  }

  public unsubscribeAll(): void {
    this.listeners.clear();
  }

  public onMessage(message: SpecialPropertyMessage) {
    this.listeners.forEach((handler) => {
      handler(message.data);
    });
  }

}