Allow dynamic library card action text

CHANGELOG.md

@@ -7,8 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-### Added
-- **Core reader for source rigs (feedpak 1.18.0).** A pack can declare what a
+### Added
+- Library card actions can now provide per-song label and icon callbacks, so
+  plugins can render dynamic card badges without DOM patching.
+- **Core reader for source rigs (feedpak 1.18.0).** A pack can declare what a
   MIDI part should sound like by binding a rig; core now reads that binding and
   hands it to the client instead of dropping it. Three parts: the
   `tone_changes` WS message carries the pack's rig bindings (`base_rig`, and

static/capabilities/library-card-actions.js

@@ -13,6 +13,7 @@
  *   register(spec) -> unregister()    spec: { id, pluginId, label, icon?,
  *       placement?('menu'|'inline'|'overlay'), order?, destructive?,
  *       applies?(song)->bool, enabled?(song)->bool, run(song, ctx) }
+ *       label/icon may be strings or (song)->string functions.
  *   list(song) -> [actionSummary]      applicable actions, sorted
  *   run(id, song, ctx) -> Promise<{ ok, outcome, result?|error? }>
  *   snapshot() -> redaction-safe registry snapshot
@@ -39,8 +40,8 @@
         return {
             id: String(spec.id),
             pluginId: String(spec.pluginId || 'unknown'),
-            label: String(spec.label || spec.id),
-            icon: spec.icon || '',
+            label: typeof spec.label === 'function' ? spec.label : () => String(spec.label || spec.id),
+            icon: typeof spec.icon === 'function' ? spec.icon : () => String(spec.icon || ''),
             placement: PLACEMENTS.includes(spec.placement) ? spec.placement : 'menu',
             order: Number.isFinite(spec.order) ? spec.order : 100,
             destructive: !!spec.destructive,
@@ -87,7 +88,11 @@
             if (!applicable) continue;
             let enabled = true;
             try { enabled = a.enabled(song) !== false; } catch (e) { enabled = true; }
-            out.push({ id: a.id, pluginId: a.pluginId, label: a.label, icon: a.icon, placement: a.placement, order: a.order, destructive: a.destructive, enabled });
+            let label = a.id;
+            try { label = String(a.label(song) || a.id); } catch (e) { label = a.id; }
+            let icon = '';
+            try { icon = String(a.icon(song) || ''); } catch (e) { icon = ''; }
+            out.push({ id: a.id, pluginId: a.pluginId, label, icon, placement: a.placement, order: a.order, destructive: a.destructive, enabled });
         }
         out.sort((x, y) => (x.order - y.order) || x.label.localeCompare(y.label));
         return out;

tests/js/library_card_actions.test.js

@@ -29,6 +29,37 @@ test('enabled() reflected in the summary but action still listed', () => {
     assert.strictEqual(on.enabled, true);
 });
 
+test('label and icon callbacks resolve per listed song', () => {
+    freshIds();
+    reg.register({
+        id: 'difficulty',
+        label: (s) => `${s.progress}%`,
+        icon: (s) => (s.progress >= 90 ? '*' : ''),
+        run() {},
+    });
+    assert.deepStrictEqual(
+        reg.list({ filename: 'easy.sloppak', progress: 42 }).map((a) => ({ label: a.label, icon: a.icon })),
+        [{ label: '42%', icon: '' }],
+    );
+    assert.deepStrictEqual(
+        reg.list({ filename: 'done.sloppak', progress: 96 }).map((a) => ({ label: a.label, icon: a.icon })),
+        [{ label: '96%', icon: '*' }],
+    );
+});
+
+test('label and icon callback errors fall back safely', () => {
+    freshIds();
+    reg.register({
+        id: 'bad-dynamic',
+        label() { throw new Error('label unavailable'); },
+        icon() { throw new Error('icon unavailable'); },
+        run() {},
+    });
+    const [action] = reg.list({ filename: 'song.sloppak' });
+    assert.strictEqual(action.label, 'bad-dynamic');
+    assert.strictEqual(action.icon, '');
+});
+
 test('run() invokes the handler and reports handled', async () => {
     freshIds();
     let got = null;