First test

backend/src/services/musicBrainzService.js

@@ -0,0 +1,142 @@
+const settingsService = require('./settingsService');
+const logger = require('./logger').child('MUSICBRAINZ');
+
+const MB_BASE = 'https://musicbrainz.org/ws/2';
+const MB_USER_AGENT = 'Ripster/1.0 (https://github.com/ripster)';
+const MB_TIMEOUT_MS = 10000;
+
+async function mbFetch(url) {
+  const controller = new AbortController();
+  const timer = setTimeout(() => controller.abort(), MB_TIMEOUT_MS);
+  try {
+    const response = await fetch(url, {
+      headers: {
+        'Accept': 'application/json',
+        'User-Agent': MB_USER_AGENT
+      },
+      signal: controller.signal
+    });
+    clearTimeout(timer);
+    if (!response.ok) {
+      throw new Error(`MusicBrainz Anfrage fehlgeschlagen (${response.status})`);
+    }
+    return response.json();
+  } catch (error) {
+    clearTimeout(timer);
+    throw error;
+  }
+}
+
+function normalizeRelease(release) {
+  if (!release) {
+    return null;
+  }
+  const artistCredit = Array.isArray(release['artist-credit'])
+    ? release['artist-credit'].map((ac) => ac?.artist?.name || ac?.name || '').filter(Boolean).join(', ')
+    : null;
+  const date = String(release.date || '').trim();
+  const yearMatch = date.match(/\b(\d{4})\b/);
+  const year = yearMatch ? Number(yearMatch[1]) : null;
+
+  const media = Array.isArray(release.media) ? release.media : [];
+  const tracks = media.flatMap((medium, mediumIdx) => {
+    const mediumTracks = Array.isArray(medium.tracks) ? medium.tracks : [];
+    return mediumTracks.map((track) => ({
+      position: Number(track.position || mediumIdx * 100 + 1),
+      number: String(track.number || track.position || ''),
+      title: String(track.title || ''),
+      durationMs: Number(track.length || 0) || null
+    }));
+  });
+
+  let coverArtUrl = null;
+  if (release['cover-art-archive'] && release['cover-art-archive'].front) {
+    coverArtUrl = `https://coverartarchive.org/release/${release.id}/front-250`;
+  }
+
+  return {
+    mbId: String(release.id || ''),
+    title: String(release.title || ''),
+    artist: artistCredit || null,
+    year,
+    date,
+    country: String(release.country || '').trim() || null,
+    label: Array.isArray(release['label-info'])
+      ? release['label-info'].map((li) => li?.label?.name).filter(Boolean).join(', ') || null
+      : null,
+    coverArtUrl,
+    tracks
+  };
+}
+
+class MusicBrainzService {
+  async isEnabled() {
+    const settings = await settingsService.getSettingsMap();
+    return settings.musicbrainz_enabled !== 'false';
+  }
+
+  async searchByTitle(query) {
+    const q = String(query || '').trim();
+    if (!q) {
+      return [];
+    }
+
+    const enabled = await this.isEnabled();
+    if (!enabled) {
+      return [];
+    }
+
+    logger.info('search:start', { query: q });
+
+    const url = new URL(`${MB_BASE}/release`);
+    url.searchParams.set('query', q);
+    url.searchParams.set('fmt', 'json');
+    url.searchParams.set('limit', '10');
+    url.searchParams.set('inc', 'artist-credits+labels+recordings');
+
+    try {
+      const data = await mbFetch(url.toString());
+      const releases = Array.isArray(data.releases) ? data.releases : [];
+      const results = releases.map(normalizeRelease).filter(Boolean);
+      logger.info('search:done', { query: q, count: results.length });
+      return results;
+    } catch (error) {
+      logger.warn('search:failed', { query: q, error: String(error?.message || error) });
+      return [];
+    }
+  }
+
+  async searchByDiscLabel(discLabel) {
+    return this.searchByTitle(discLabel);
+  }
+
+  async getReleaseById(mbId) {
+    const id = String(mbId || '').trim();
+    if (!id) {
+      return null;
+    }
+
+    const enabled = await this.isEnabled();
+    if (!enabled) {
+      return null;
+    }
+
+    logger.info('getById:start', { mbId: id });
+
+    const url = new URL(`${MB_BASE}/release/${id}`);
+    url.searchParams.set('fmt', 'json');
+    url.searchParams.set('inc', 'artist-credits+labels+recordings+cover-art-archive');
+
+    try {
+      const data = await mbFetch(url.toString());
+      const result = normalizeRelease(data);
+      logger.info('getById:done', { mbId: id, title: result?.title });
+      return result;
+    } catch (error) {
+      logger.warn('getById:failed', { mbId: id, error: String(error?.message || error) });
+      return null;
+    }
+  }
+}
+
+module.exports = new MusicBrainzService();