tdlib-native/dist/event-bus.mjs

🚀 Telegram TDLib native nodejs wrapper

import { assert } from "./assert.mjs";
class EventBus {
  _subscriptions = /* @__PURE__ */ new Map();
  _onComplete = /* @__PURE__ */ new Set();
  _completed = false;
  /**
   *
   *
   * @param {T} value
   * @returns {this}
   * @memberof EventBus
   */
  emit(value) {
    for (const subscription of this._subscriptions.keys()) {
      subscription(value);
    }
    return this;
  }
  /**
   *
   *
   * @param {Subscription<T>} handler
   * @returns {Unsubscribe}  {Unsubscribe}
   * @memberof EventBus
   */
  subscribe(handler) {
    assert(!this._completed, "Completed");
    const cached = this._subscriptions.get(handler);
    if (cached) return cached;
    const unsubscribe = () => {
      this._subscriptions.delete(handler);
    };
    this._subscriptions.set(handler, unsubscribe);
    return unsubscribe;
  }
  /**
   *
   *
   * @memberof EventBus
   * @returns {void}
   */
  complete() {
    if (this._completed) return;
    this._completed = true;
    for (const unsubscribe of this._subscriptions.values()) {
      unsubscribe();
    }
    for (const complete of this._onComplete) {
      complete();
      this._onComplete.delete(complete);
    }
  }
  /**
   *
   *
   * @returns {Observer<T>}
   * @example
   * import { Observable } from "rxjs";
   *
   * const bus = new EventBus<number>();
   * const observable = new Observable(bus.toRxObserver());
   * // Observable<number>
   */
  toRxObserver() {
    return (subscriber) => {
      this._onComplete.add(() => {
        var _a;
        return (_a = subscriber.complete) == null ? void 0 : _a.call(subscriber);
      });
      return this.subscribe((value) => subscriber.next(value));
    };
  }
}
export {
  EventBus
};