feat: implemented artwork fetching/downloading

app.py

@@ -615,6 +615,51 @@ def save_settings():
     return jsonify({"ok": True})
 
 
+# ---------------------------------------------------------------------------
+# Artwork routes
+# ---------------------------------------------------------------------------
+
+@app.route("/api/artwork", methods=["GET"])
+def get_artwork():
+    from monochrome.spotify_to_ids import parse_spotify_url, fetch_spotify_embed
+    spotify_url = request.args.get("url", "").strip()
+    if not spotify_url:
+        return jsonify({"error": "No URL provided"}), 400
+
+    sp_type, sp_id = parse_spotify_url(spotify_url)
+    if not sp_type:
+        return jsonify({"error": "Invalid Spotify URL"}), 400
+
+    embed_data = fetch_spotify_embed(sp_type, sp_id)
+    if not embed_data:
+        return jsonify({"error": "Could not fetch Spotify metadata"}), 502
+
+    try:
+        entity = embed_data["props"]["pageProps"]["state"]["data"]["entity"]
+    except (KeyError, TypeError):
+        return jsonify({"error": "Unexpected Spotify response format"}), 502
+
+    # entity.visualIdentity.image[] — confirmed structure from Spotify embed page
+    # Each entry: {"url": "https://image-cdn-ak.spotifycdn.com/image/...", "maxWidth": N, "maxHeight": N}
+    images = (entity.get("visualIdentity") or {}).get("image", [])
+    if not images:
+        app.logger.warning("Artwork not found. Entity keys: %s", list(entity.keys()))
+        return jsonify({"error": "No artwork found for this URL"}), 404
+
+    best = max(images, key=lambda img: img.get("maxWidth", 0))
+    url = best["url"]
+
+    # Upscale to 2000×2000 using the same CDN key technique as votify-fix.
+    # Spotify CDN filenames: first 16 hex chars = size key, remainder = image hash.
+    # Source: GladistonXD/votify-fix constants.py COVER_SIZE_X_KEY_MAPPING_SONG
+    EXTRA_LARGE_KEY = "ab67616d000082c1"
+    parts = url.rsplit("/", 1)
+    if len(parts) == 2 and len(parts[1]) >= 16:
+        url = parts[0] + "/" + EXTRA_LARGE_KEY + parts[1][16:]
+
+    return jsonify({"image_url": url})
+
+
 # ---------------------------------------------------------------------------
 # Job routes
 # ---------------------------------------------------------------------------

templates/index.html

@@ -179,6 +179,7 @@
                 <div style="margin-top: 16px; display: flex; gap: 8px;">
                     <button class="btn btn-sm btn-secondary" onclick="showPage('download')">Votify (Spotify)</button>
                     <button class="btn btn-sm btn-secondary" onclick="showPage('monochrome')">Monochrome (Tidal)</button>
+                    <button class="btn btn-sm btn-secondary" onclick="showPage('artwork')">Artwork</button>
                 </div>
             </div>
         </div>
@@ -280,6 +281,19 @@
             </div>
         </div>
 
+        <!-- ARTWORK PAGE -->
+        <div id="page-artwork" class="page">
+            <div class="card">
+                <h2>Artwork</h2>
+                <div class="form-group">
+                    <label for="artwork-url">Spotify URL (track, album, or playlist)</label>
+                    <textarea id="artwork-url" placeholder="https://open.spotify.com/album/..." style="min-height:60px"></textarea>
+                </div>
+                <button class="btn" id="btn-artwork" onclick="fetchArtwork()">Get Artwork</button>
+                <div id="artwork-result" style="margin-top:20px"></div>
+            </div>
+        </div>
+
         <!-- JOBS PAGE -->
         <div id="page-jobs" class="page">
             <div class="card">
@@ -448,8 +462,8 @@
             document.querySelectorAll('.tab').forEach(t => t.classList.remove('active'));
             document.getElementById('page-' + name).classList.add('active');
 
-            // For hidden pages (download/monochrome), highlight the "Download" tab
+            // For sub-pages (download/monochrome/artwork), highlight the "Download" tab
-            const tabName = (name === 'download' || name === 'monochrome') ? 'unified' : name;
+            const tabName = (name === 'download' || name === 'monochrome' || name === 'artwork') ? 'unified' : name;
             const matchingTab = document.querySelector(`.tab[onclick="showPage('${tabName}')"]`);
             if (matchingTab) matchingTab.classList.add('active');
             document.querySelectorAll('.bottom-tab').forEach(t => t.classList.toggle('active', t.dataset.page === tabName));
@@ -1092,6 +1106,34 @@
             }
         }
 
+        async function fetchArtwork() {
+            const btn = document.getElementById('btn-artwork');
+            const url = document.getElementById('artwork-url').value.trim().split('\n')[0].trim();
+            const resultDiv = document.getElementById('artwork-result');
+            if (!url) { showToast('Enter a Spotify URL', 'error'); return; }
+
+            btn.disabled = true;
+            resultDiv.innerHTML = '<span style="color:var(--text2)">Fetching artwork...</span>';
+
+            try {
+                const res = await fetch('/api/artwork?url=' + encodeURIComponent(url));
+                const data = await res.json();
+                if (res.ok && data.image_url) {
+                    const img = document.createElement('img');
+                    img.src = data.image_url;
+                    img.alt = 'Cover artwork';
+                    img.style.cssText = 'max-width:100%;border-radius:var(--radius);display:block;';
+                    resultDiv.innerHTML = '';
+                    resultDiv.appendChild(img);
+                } else {
+                    resultDiv.innerHTML = '<span style="color:var(--danger)">' + escapeHtml(data.error || 'No artwork found') + '</span>';
+                }
+            } catch (e) {
+                resultDiv.innerHTML = '<span style="color:var(--danger)">Failed to fetch artwork</span>';
+            }
+            btn.disabled = false;
+        }
+
         function formatSize(bytes) {
             if (!bytes) return '';
             const units = ['B', 'KB', 'MB', 'GB'];
@@ -1137,9 +1179,11 @@
             // Drop onto active page's textarea
             const monoActive = document.getElementById('page-monochrome').classList.contains('active');
             const votifyActive = document.getElementById('page-download').classList.contains('active');
+            const artworkActive = document.getElementById('page-artwork').classList.contains('active');
             let taId = 'unified-urls';
             if (monoActive) taId = 'mono-url';
             else if (votifyActive) taId = 'urls';
+            else if (artworkActive) taId = 'artwork-url';
             const ta = document.getElementById(taId);
             ta.value = (ta.value.trim() ? ta.value.trim() + '\n' : '') + lines.join('\n');
             ta.classList.remove('drop-flash');
@@ -1147,7 +1191,7 @@
             ta.classList.add('drop-flash');
             setTimeout(() => ta.classList.remove('drop-flash'), 650);
         });
-        for (const id of ['urls', 'mono-url', 'unified-urls']) {
+        for (const id of ['urls', 'mono-url', 'unified-urls', 'artwork-url']) {
             const ta = document.getElementById(id);
             ta.addEventListener('dragover', () => ta.classList.add('drag-over'));
             ta.addEventListener('dragleave', () => ta.classList.remove('drag-over'));