(Proper) Initial commit

backend/services/metadata.ts

@@ -0,0 +1,50 @@
+import {JSDOM} from 'jsdom';
+import {Song, SongSource} from '../types/queue';
+
+const TITLE_SELECTOR: string = 'h1[class="svelte-6pt9ji"]';
+const ARTIST_SELECTOR: string = 'h2[class="svelte-6pt9ji"]';
+const TRACK_COUNT_SELECTOR: string = 'h3[class="svelte-6pt9ji"]';
+const COVER_SELECTOR: string = 'a[title="Click for full quality cover (unproxied)."]';
+
+export async function fetchMetadata(url: string): Promise<Song> {
+    const resp: Response = await fetch('https://lucida.to/?url=' + encodeURIComponent(url));
+    if (!resp.ok) {
+        return {
+            title: '<unknown>',
+            artist: '<unknown>',
+            trackCount: -1,
+            url: url,
+            source: getSource(url)
+        }
+    }
+
+    const doc: Document = new JSDOM(await resp.text()).window.document;
+    const title: string = doc.querySelector(TITLE_SELECTOR)?.textContent?.trim() ?? '<unknown>';
+    const artist: string = doc.querySelector(ARTIST_SELECTOR)?.textContent?.trim() ?? '<unknown>';
+    const trackCount: number = parseInt(doc.querySelector(TRACK_COUNT_SELECTOR)?.innerHTML.trim().split(' ')[0] ?? '-1');
+    const cover: string | undefined = doc.querySelector(COVER_SELECTOR)?.attributes.getNamedItem('href')?.value ?? undefined;
+
+    return {
+        title: title,
+        artist: artist.substring(artist.indexOf(' ') + 1),
+        trackCount: trackCount,
+        url: url,
+        source: getSource(url),
+        cover: cover
+    }
+}
+
+function getSource(url: string): SongSource {
+    const urlToSource: Map<string, SongSource> = new Map([
+        ['qobuz.com', SongSource.Qobuz],
+        ['spotify.com', SongSource.Spotify]
+    ]);
+
+    for (const [key, value] of urlToSource) {
+        if (url.includes(key)) {
+            return value;
+        }
+    }
+
+    return SongSource.Unknown;
+}