utils getAudioPlayerPreviousPlayableTrack.ts

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  import { AudioPlayer } from "hooks";
import { ITrack } from "types/spotify";
 
export function getAudioPlayerPreviousPlayableTrack(
  audioPlayer: AudioPlayer
): ITrack | null {
  const allTracks = audioPlayer.allTracks;
  const currentTrackIndex = allTracks.findIndex(
    ({ preview_url }) => preview_url === audioPlayer.src
  );
  let previousTrackIndex = (currentTrackIndex ?? -1) - 1;
  let previousTrack: ITrack | null = null;
 
  while (previousTrackIndex >= 0) {
    const previewUrl = allTracks[previousTrackIndex]?.preview_url;
    Iif (previewUrl) {
      previousTrack = allTracks[previousTrackIndex];
      break;
    }
    previousTrackIndex--;
  }
 
  return previousTrack;
}