rjweb-server/lib/esm/classes/miniEventEmitter.js

Easy and Robust Way to create a Web Server with Many Easy-to-use Features in NodeJS

const normalize = (o) => o ?? [];
class MiniEventEmitter {
  constructor() {
    this.listeners = {};
  }
  /**
   * Listen for an Event
   * @since 7.7.0
  */
  listen(event, callback) {
    this.listeners[event] = normalize(this.listeners[event]);
    this.listeners[event].push(callback);
    return this;
  }
  /**
   * Remove a listener
   * @since 7.7.0
  */
  unlist(event, callback) {
    this.listeners[event] = this.listeners[event].filter((e) => Object.is(e, callback));
    return this;
  }
  /**
   * Send (Emit) an Event
   * @since 7.7.0
  */
  async send(event, ...args) {
    this.listeners[event] = normalize(this.listeners[event]);
    const returns = [];
    for (const callback of this.listeners[event]) {
      try {
        const res = await Promise.resolve(callback(...args));
        returns.push(res);
      } catch (err) {
        returns.push(err);
        break;
      }
    }
    return returns;
  }
}
export {
  MiniEventEmitter as default
};