Update gallery cache if image count changes

src/includes/api.php

@@ -16,6 +16,13 @@ $cache_file   = $CONFIG['cache_file'];
 // Serve cached gallery JSON if fresh
 if (file_exists($cache_file)) {
     $data = json_decode(file_get_contents($cache_file), true);
+    $count = count_all_images($CONFIG);
+    if ($count !== $data['countall']) {
+        unlink($cache_file);
+        $data = buildGalleryCache($CONFIG);
+        if (!is_dir(dirname($cache_file))) @mkdir(dirname($cache_file), 0775, true);
+        file_put_contents($cache_file, json_encode($data, JSON_PRETTY_PRINT));
+    }
 } else {
     $data = buildGalleryCache($CONFIG);
     if (!is_dir(dirname($cache_file))) @mkdir(dirname($cache_file), 0775, true);
@@ -37,6 +44,30 @@ echo json_encode([
 
 // --- FUNCTIONS ---
 
+function count_all_images($CONFIG) {
+    $dir = $CONFIG['sorted_img_dir'];
+    if (!is_dir($dir)) {
+        return 0;
+    }
+
+    $count = 0;
+    $iterator = new RecursiveIteratorIterator(
+        new RecursiveDirectoryIterator($dir, FilesystemIterator::SKIP_DOTS)
+    );
+
+    foreach ($iterator as $file) {
+        if ($file->isFile()) {
+            $ext = strtolower($file->getExtension());
+            if ($ext === 'arw' || $ext === 'raw' ||
+                $ext === 'jpg' || $ext === 'png' ) {
+                $count++;
+            }
+        }
+    }
+
+    return $count;
+}
+
 function count_raw_files($CONFIG) {
     $dir = $CONFIG['sorted_img_dir'].'/arw';
     if (!is_dir($dir)) {
@@ -101,6 +132,7 @@ function buildGalleryCache($CONFIG) {
         'generated' => date('c'),
         'countjpg'  => count($images),
         'countraw'  => count_raw_files($CONFIG),
+        'countall'  => count_all_images($CONFIG),
         'images'    => $images
     ];
 }