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import {inject, injectable, optional} from 'inversify';
import * as spotifyURI from 'spotify-uri';
import {SongMetadata, QueuedPlaylist, MediaSource} from './player.js';
import {TYPES} from '../types.js';
import ffmpeg from 'fluent-ffmpeg';
import YoutubeAPI from './youtube-api.js';
import SpotifyAPI, {SpotifyTrack} from './spotify-api.js';
import {URL} from 'node:url';
@injectable()
export default class {
private readonly youtubeAPI: YoutubeAPI;
private readonly spotifyAPI?: SpotifyAPI;
constructor(@inject(TYPES.Services.YoutubeAPI) youtubeAPI: YoutubeAPI, @inject(TYPES.Services.SpotifyAPI) @optional() spotifyAPI?: SpotifyAPI) {
this.youtubeAPI = youtubeAPI;
this.spotifyAPI = spotifyAPI;
}
async getSongs(query: string, playlistLimit: number, shouldSplitChapters: boolean): Promise<[SongMetadata[], string]> {
const newSongs: SongMetadata[] = [];
let extraMsg = '';
// Test if it's a complete URL
try {
const url = new URL(query);
const YOUTUBE_HOSTS = [
'www.youtube.com',
'youtu.be',
'youtube.com',
'music.youtube.com',
'www.music.youtube.com',
];
if (YOUTUBE_HOSTS.includes(url.host)) {
// YouTube source
if (url.searchParams.get('list')) {
// YouTube playlist
newSongs.push(...await this.youtubePlaylist(url.searchParams.get('list')!, shouldSplitChapters));
} else {
const songs = await this.youtubeVideo(url.href, shouldSplitChapters);
if (songs) {
newSongs.push(...songs);
} else {
throw new Error('that doesn\'t exist');
}
}
} else if (url.protocol === 'spotify:' || url.host === 'open.spotify.com') {
if (this.spotifyAPI === undefined) {
throw new Error('Spotify is not enabled!');
}
const [convertedSongs, nSongsNotFound, totalSongs] = await this.spotifySource(query, playlistLimit, shouldSplitChapters);
if (totalSongs > playlistLimit) {
extraMsg = `a random sample of ${playlistLimit} songs was taken`;
}
if (totalSongs > playlistLimit && nSongsNotFound !== 0) {
extraMsg += ' and ';
}
if (nSongsNotFound !== 0) {
if (nSongsNotFound === 1) {
extraMsg += '1 song was not found';
} else {
extraMsg += `${nSongsNotFound.toString()} songs were not found`;
}
}
newSongs.push(...convertedSongs);
} else {
const song = await this.httpLiveStream(query);
if (song) {
newSongs.push(song);
} else {
throw new Error('that doesn\'t exist');
}
}
} catch (err: any) {
if (err instanceof Error && err.message === 'Spotify is not enabled!') {
throw err;
}
// Not a URL, must search YouTube
const songs = await this.youtubeVideoSearch(query, shouldSplitChapters);
if (songs) {
newSongs.push(...songs);
} else {
throw new Error('that doesn\'t exist');
}
}
return [newSongs, extraMsg];
}
private async youtubeVideoSearch(query: string, shouldSplitChapters: boolean): Promise<SongMetadata[]> {
return this.youtubeAPI.search(query, shouldSplitChapters);
}
private async youtubeVideo(url: string, shouldSplitChapters: boolean): Promise<SongMetadata[]> {
return this.youtubeAPI.getVideo(url, shouldSplitChapters);
}
private async youtubePlaylist(listId: string, shouldSplitChapters: boolean): Promise<SongMetadata[]> {
return this.youtubeAPI.getPlaylist(listId, shouldSplitChapters);
}
private async spotifySource(url: string, playlistLimit: number, shouldSplitChapters: boolean): Promise<[SongMetadata[], number, number]> {
if (this.spotifyAPI === undefined) {
return [[], 0, 0];
}
const parsed = spotifyURI.parse(url);
switch (parsed.type) {
case 'album': {
const [tracks, playlist] = await this.spotifyAPI.getAlbum(url, playlistLimit);
return this.spotifyToYouTube(tracks, shouldSplitChapters, playlist);
}
case 'playlist': {
const [tracks, playlist] = await this.spotifyAPI.getPlaylist(url, playlistLimit);
return this.spotifyToYouTube(tracks, shouldSplitChapters, playlist);
}
case 'track': {
const tracks = [await this.spotifyAPI.getTrack(url)];
return this.spotifyToYouTube(tracks, shouldSplitChapters);
}
case 'artist': {
const tracks = await this.spotifyAPI.getArtist(url, playlistLimit);
return this.spotifyToYouTube(tracks, shouldSplitChapters);
}
default: {
return [[], 0, 0];
}
}
}
private async httpLiveStream(url: string): Promise<SongMetadata> {
return new Promise((resolve, reject) => {
ffmpeg(url).ffprobe((err, _) => {
if (err) {
reject();
}
resolve({
url,
source: MediaSource.HLS,
isLive: true,
title: url,
artist: url,
length: 0,
offset: 0,
playlist: null,
thumbnailUrl: null,
});
});
});
}
private async spotifyToYouTube(tracks: SpotifyTrack[], shouldSplitChapters: boolean, playlist?: QueuedPlaylist | undefined): Promise<[SongMetadata[], number, number]> {
const promisedResults = tracks.map(async track => this.youtubeAPI.search(`"${track.name}" "${track.artist}"`, shouldSplitChapters));
const searchResults = await Promise.allSettled(promisedResults);
let nSongsNotFound = 0;
// Count songs that couldn't be found
const songs: SongMetadata[] = searchResults.reduce((accum: SongMetadata[], result) => {
if (result.status === 'fulfilled') {
for (const v of result.value) {
accum.push({
...v,
...(playlist ? {playlist} : {}),
});
}
} else {
nSongsNotFound++;
}
return accum;
}, []);
return [songs, nSongsNotFound, tracks.length];
}
}
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