codevise/pageflow

import {AudioPlayer} from '../AudioPlayer';

export const PlayerSourceIDMap = function (media, {playerOptions} = {}) {
  return {
    current: undefined,
    previous: undefined,
    mapSources: function (id, sources) {
      this[id] = sources;
    },
    get: function (sourceID) {
      if (!this[sourceID]) {
        return new AudioPlayer.Null();
      }

      if (this.current && this.current.playerId === sourceID) {
        return this.current;
      }
      if (this.previous && this.previous.playerId === sourceID) {
        let holder = this.current;
        this.current = this.previous;
        this.previous = holder;
      }
      else{
        if (this.previous) {
          media.releasePlayer(this.previous);
        }

        this.previous = this.current;
        this.current = media.getPlayer(this[sourceID], {
          filePermaId: sourceID,
          playerId: sourceID,
          ...playerOptions
        });
      }
      return this.current;
    }
  }
}