react-native-theoplayer/lib/module/internal/adapter/event/DefaultEventDispatcher.js

A THEOplayer video component for react-native.

"use strict";

import { arrayRemoveElement } from '../../utils/arrayUtil';
export class DefaultEventDispatcher {
  _eventListeners = new Map();
  addEventListener(type, listener) {
    if (typeof listener !== 'function') {
      return;
    } else if (Array.isArray(type)) {
      type.forEach(t => this.addSingleEventListener(t, listener));
    } else {
      this.addSingleEventListener(type, listener);
    }
  }
  addSingleEventListener(type, listener) {
    if (!this._eventListeners.has(type)) {
      this._eventListeners.set(type, [listener]);
    } else {
      this._eventListeners.get(type)?.push(listener);
    }
  }
  clearEventListeners() {
    this._eventListeners.clear();
  }
  dispatchEvent = event => {
    const listeners = (this._eventListeners.get(event.type) ?? []).slice();
    for (const listener of listeners) {
      listener.call(this, event);
    }
  };
  removeEventListener(type, listener) {
    if (typeof listener !== 'function') {
      return;
    } else if (Array.isArray(type)) {
      type.forEach(t => this.removeSingleEventListener(t, listener));
    } else {
      this.removeSingleEventListener(type, listener);
    }
  }
  removeSingleEventListener(type, listener) {
    const listeners = this._eventListeners.get(type);
    if (listeners) {
      arrayRemoveElement(listeners, listener);
    }
  }
}
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