ProviderMusixmatch.js

const ProviderMusixmatch = (() => {
	const headers = {
		authority: "apic-desktop.musixmatch.com",
		cookie: "x-mxm-token-guid=",
	};

	async function findLyrics(info) {
		const baseURL =
			"https://apic-desktop.musixmatch.com/ws/1.1/macro.subtitles.get?format=json&namespace=lyrics_richsynched&subtitle_format=mxm&app_id=web-desktop-app-v1.0&";

		const durr = info.duration / 1000;

		const params = {
			q_album: info.album,
			q_artist: info.artist,
			q_artists: info.artist,
			q_track: info.title,
			track_spotify_id: info.uri,
			q_duration: durr,
			f_subtitle_length: Math.floor(durr),
			usertoken: CONFIG.providers.musixmatch.token,
		};

		const finalURL =
			baseURL +
			Object.keys(params)
				.map((key) => `${key}=${encodeURIComponent(params[key])}`)
				.join("&");

		let body = await Spicetify.CosmosAsync.get(finalURL, null, headers);

		body = body.message.body.macro_calls;

		if (body["matcher.track.get"].message.header.status_code !== 200) {
			return {
				error: `Requested error: ${body["matcher.track.get"].message.header.mode}`,
				uri: info.uri,
			};
		}
		if (body["track.lyrics.get"]?.message?.body?.lyrics?.restricted) {
			return {
				error: "Unfortunately we're not authorized to show these lyrics.",
				uri: info.uri,
			};
		}

		return body;
	}

	async function getKaraoke(body) {
		const meta = body?.["matcher.track.get"]?.message?.body;
		if (!meta) {
			return null;
		}

		if (!meta.track.has_richsync || meta.track.instrumental) {
			return null;
		}

		const baseURL = "https://apic-desktop.musixmatch.com/ws/1.1/track.richsync.get?format=json&subtitle_format=mxm&app_id=web-desktop-app-v1.0&";

		const params = {
			f_subtitle_length: meta.track.track_length,
			q_duration: meta.track.track_length,
			commontrack_id: meta.track.commontrack_id,
			usertoken: CONFIG.providers.musixmatch.token,
		};

		const finalURL =
			baseURL +
			Object.keys(params)
				.map((key) => `${key}=${encodeURIComponent(params[key])}`)
				.join("&");

		let result = await Spicetify.CosmosAsync.get(finalURL, null, headers);

		if (result.message.header.status_code !== 200) {
			return null;
		}

		result = result.message.body;

		const parsedKaraoke = JSON.parse(result.richsync.richsync_body).map((line) => {
			const startTime = line.ts * 1000;
			const endTime = line.te * 1000;
			const words = line.l;

			const text = words.map((word, index, words) => {
				const wordText = word.c;
				const wordStartTime = word.o * 1000;
				const nextWordStartTime = words[index + 1]?.o * 1000;

				const time = !Number.isNaN(nextWordStartTime) ? nextWordStartTime - wordStartTime : endTime - (wordStartTime + startTime);

				return {
					word: wordText,
					time,
				};
			});
			return {
				startTime,
				text,
			};
		});

		return parsedKaraoke;
	}

	function getSynced(body) {
		const meta = body?.["matcher.track.get"]?.message?.body;
		if (!meta) {
			return null;
		}

		const hasSynced = meta?.track?.has_subtitles;

		const isInstrumental = meta?.track?.instrumental;

		if (isInstrumental) {
			return [{ text: "♪ Instrumental ♪", startTime: "0000" }];
		}
		if (hasSynced) {
			const subtitle = body["track.subtitles.get"]?.message?.body?.subtitle_list?.[0]?.subtitle;
			if (!subtitle) {
				return null;
			}

			return JSON.parse(subtitle.subtitle_body).map((line) => ({
				text: line.text || "♪",
				startTime: line.time.total * 1000,
			}));
		}

		return null;
	}

	function getUnsynced(body) {
		const meta = body?.["matcher.track.get"]?.message?.body;
		if (!meta) {
			return null;
		}

		const hasUnSynced = meta.track.has_lyrics || meta.track.has_lyrics_crowd;

		const isInstrumental = meta?.track?.instrumental;

		if (isInstrumental) {
			return [{ text: "♪ Instrumental ♪" }];
		}
		if (hasUnSynced) {
			const lyrics = body["track.lyrics.get"]?.message?.body?.lyrics?.lyrics_body;
			if (!lyrics) {
				return null;
			}
			return lyrics.split("\n").map((text) => ({ text }));
		}

		return null;
	}

	async function getTranslation(body) {
		const track_id = body?.["matcher.track.get"]?.message?.body?.track?.track_id;
		if (!track_id) return null;

		const baseURL =
			"https://apic-desktop.musixmatch.com/ws/1.1/crowd.track.translations.get?translation_fields_set=minimal&selected_language=en&comment_format=text&format=json&app_id=web-desktop-app-v1.0&";

		const params = {
			track_id,
			usertoken: CONFIG.providers.musixmatch.token,
		};

		const finalURL =
			baseURL +
			Object.keys(params)
				.map((key) => `${key}=${encodeURIComponent(params[key])}`)
				.join("&");

		let result = await Spicetify.CosmosAsync.get(finalURL, null, headers);

		if (result.message.header.status_code !== 200) return null;

		result = result.message.body;

		if (!result.translations_list?.length) return null;

		return result.translations_list.map(({ translation }) => ({ translation: translation.description, matchedLine: translation.matched_line }));
	}

	return { findLyrics, getKaraoke, getSynced, getUnsynced, getTranslation };
})();