codevise/pageflow

export function updateTextTracksMode(player, activeTextTrackFileId) {
  [].slice.call(player.textTracks()).forEach(textTrack => {
    if (textTrack.id === `text_track_file_${activeTextTrackFileId}`) {
      textTrack.mode = 'showing';
    }
    else {
      textTrack.mode = 'disabled';
    }
  });
}

export function getTextTrackSources(textTrackFiles, textTracksDisabled) {
  if (textTracksDisabled) {
    return [];
  }

  return textTrackFiles
    .filter(textTrackFile => textTrackFile.isReady)
    .map(textTrackFile => ({
      id: `text_track_file_${textTrackFile.id}`,
      kind: textTrackFile.configuration.kind,
      label: textTrackFile.displayLabel,
      srclang: textTrackFile.configuration.srclang,
      src: textTrackFile.urls.vtt
    }));
}