oxygen-core/src/asset-loaders/MusicAsset.js

Oxygen game engine (Xenon Core for browsers)

import Asset from '../systems/AssetSystem/Asset';

/**
 * Music asset loader.
 */
export default class MusicAsset extends Asset {

  /**
   * Asset factory.
   *
   * @param {*}	args - Factory parameters.
   *
   * @return {MusicAsset} Asset instance.
   *
   * @example
   * system.registerProtocol('music', MusicAsset.factory);
   */
  static factory(...args) {
    return new MusicAsset(...args);
  }

  /**
   * @override 
   */
  load() {
    const { filename, owner } = this;

    return owner.fetchEngine(owner.pathPrefix + filename, owner.fetchOptions)
      .then(response => !!response.ok
        ? response.blob()
        : Promise.reject(new Error(`Cannot load music file: ${filename}`))
      )
      .then(data => new Promise((resolve, reject) => {
        const audio = new Audio();

        this.data = audio;
        audio.onerror = error => reject(`Cannot read music file: ${filename}`);
        audio.src = URL.createObjectURL(data);
        resolve(this);
      }));
  }

}