feat: v1.18.0 — Offline Mode (Beta), MPRIS Seek, 2 New Themes, Perf Fixes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/utils/imageCache.ts

@@ -1,3 +1,5 @@
+import { useAuthStore } from '../store/authStore';
+
 const DB_NAME = 'psysonic-img-cache';
 const STORE_NAME = 'images';
 const MAX_AGE_MS = 30 * 24 * 60 * 60 * 1000; // 30 days
@@ -25,7 +27,7 @@ function releaseFetchSlot(): void {
   if (next) { activeFetches++; next(); }
 }
 
-function evictIfNeeded(): void {
+function evictMemoryIfNeeded(): void {
   while (objectUrlCache.size > MAX_MEMORY_CACHE) {
     const oldestKey = objectUrlCache.keys().next().value;
     if (!oldestKey) break;
@@ -73,6 +75,48 @@ async function getBlob(key: string): Promise<Blob | null> {
   }
 }
 
+/** Evicts oldest IDB entries until total blob size is below maxBytes. Fire-and-forget. */
+async function evictDiskIfNeeded(maxBytes: number): Promise<void> {
+  try {
+    const database = await openDB();
+    const entries: Array<{ key: string; timestamp: number; size: number }> = await new Promise(resolve => {
+      const req = database.transaction(STORE_NAME, 'readonly').objectStore(STORE_NAME).getAll();
+      req.onsuccess = () => {
+        resolve(
+          (req.result ?? []).map((e: { key: string; timestamp: number; blob: Blob }) => ({
+            key: e.key,
+            timestamp: e.timestamp,
+            size: e.blob?.size ?? 0,
+          })),
+        );
+      };
+      req.onerror = () => resolve([]);
+    });
+
+    let total = entries.reduce((acc, e) => acc + e.size, 0);
+    if (total <= maxBytes) return;
+
+    // Oldest first
+    entries.sort((a, b) => a.timestamp - b.timestamp);
+
+    const tx = database.transaction(STORE_NAME, 'readwrite');
+    const store = tx.objectStore(STORE_NAME);
+    for (const entry of entries) {
+      if (total <= maxBytes) break;
+      store.delete(entry.key);
+      // Also purge from memory cache
+      const objUrl = objectUrlCache.get(entry.key);
+      if (objUrl) {
+        URL.revokeObjectURL(objUrl);
+        objectUrlCache.delete(entry.key);
+      }
+      total -= entry.size;
+    }
+  } catch {
+    // Ignore
+  }
+}
+
 async function putBlob(key: string, blob: Blob): Promise<void> {
   try {
     const database = await openDB();
@@ -82,11 +126,50 @@ async function putBlob(key: string, blob: Blob): Promise<void> {
       tx.oncomplete = () => resolve();
       tx.onerror = () => resolve();
     });
+    // Enforce disk limit after write (fire-and-forget)
+    const maxBytes = useAuthStore.getState().maxCacheMb * 1024 * 1024;
+    evictDiskIfNeeded(maxBytes);
   } catch {
     // Ignore write errors
   }
 }
 
+/** Returns the total size in bytes of all blobs stored in IndexedDB. */
+export async function getImageCacheSize(): Promise<number> {
+  try {
+    const database = await openDB();
+    return new Promise(resolve => {
+      const req = database.transaction(STORE_NAME, 'readonly').objectStore(STORE_NAME).getAll();
+      req.onsuccess = () => {
+        const entries: Array<{ blob: Blob }> = req.result ?? [];
+        resolve(entries.reduce((acc, e) => acc + (e.blob?.size ?? 0), 0));
+      };
+      req.onerror = () => resolve(0);
+    });
+  } catch {
+    return 0;
+  }
+}
+
+/** Clears all entries from IndexedDB and revokes all in-memory object URLs. */
+export async function clearImageCache(): Promise<void> {
+  for (const url of objectUrlCache.values()) {
+    URL.revokeObjectURL(url);
+  }
+  objectUrlCache.clear();
+  try {
+    const database = await openDB();
+    await new Promise<void>(resolve => {
+      const tx = database.transaction(STORE_NAME, 'readwrite');
+      tx.objectStore(STORE_NAME).clear();
+      tx.oncomplete = () => resolve();
+      tx.onerror = () => resolve();
+    });
+  } catch {
+    // Ignore
+  }
+}
+
 /**
  * Returns a cached object URL for an image.
  * @param fetchUrl  The actual URL to fetch from (may contain ephemeral auth params).
@@ -104,7 +187,7 @@ export async function getCachedUrl(fetchUrl: string, cacheKey: string): Promise<
   if (blob) {
     const objUrl = URL.createObjectURL(blob);
     objectUrlCache.set(cacheKey, objUrl);
-    evictIfNeeded();
+    evictMemoryIfNeeded();
     return objUrl;
   }
 
@@ -114,10 +197,10 @@ export async function getCachedUrl(fetchUrl: string, cacheKey: string): Promise<
     const resp = await fetch(fetchUrl);
     if (!resp.ok) return fetchUrl;
     const newBlob = await resp.blob();
-    putBlob(cacheKey, newBlob); // fire-and-forget
+    putBlob(cacheKey, newBlob); // fire-and-forget (includes disk eviction)
     const objUrl = URL.createObjectURL(newBlob);
     objectUrlCache.set(cacheKey, objUrl);
-    evictIfNeeded();
+    evictMemoryIfNeeded();
     return objUrl;
   } catch {
     return fetchUrl;