import { EventEmitter as Emitter } from "eventemitter3";

export class CacheUpdateEvent {
  static type = "CacheUpdate";
  id: string;
  parser: any;
  isNew: boolean;
  constructor(id: string, isNew: boolean, parser: any) {
    this.id = id;
    this.parser = parser;
    this.isNew = isNew;
  }
}

export class CacheDeleteEvent {
  static type = "CacheDelete";
  id: string;
  constructor(id: string) {
    this.id = id;
  }
}

export class EventEmitter {
  private emitter = new Emitter();

  onCache(callback: (args: CacheUpdateEvent) => void) {
    this.emitter.on(CacheUpdateEvent.type, callback);

    return () => this.emitter.removeListener(CacheUpdateEvent.type, callback);
  }

  raiseCacheUpdated(id: string, isNew: boolean, parser: any) {
    this.emitter.emit(
      CacheUpdateEvent.type,
      new CacheUpdateEvent(id, isNew, parser)
    );
  }

  raiseCacheDeleted(id: string) {
    this.emitter.emit(CacheDeleteEvent.type, new CacheDeleteEvent(id));
  }
}