Update engine.py

engine.py

@@ -9,12 +9,16 @@ class SorterEngine:
 
     @staticmethod
     def get_images(path):
+        """Returns list of image files in a directory."""
         exts = ('.jpg', '.jpeg', '.png', '.webp', '.bmp', '.tiff')
         if not path or not os.path.exists(path): return []
-        return sorted([f for f in os.listdir(path) if f.lower().endswith(exts)])
+        try:
+            return sorted([f for f in os.listdir(path) if f.lower().endswith(exts)])
+        except: return []
 
     @staticmethod
     def get_id_mapping(path):
+        """Maps idXXX prefixes to full filenames."""
         mapping = {}
         for f in SorterEngine.get_images(path):
             if f.startswith("id") and "_" in f:
@@ -24,19 +28,22 @@ class SorterEngine:
 
     @staticmethod
     def get_max_id_number(folder_path):
+        """Finds the highest idXXX_ prefix in a folder."""
         max_id = 0
         if not folder_path or not os.path.exists(folder_path): return 0
-        for f in os.listdir(folder_path):
-            if f.startswith("id") and "_" in f:
-                try:
-                    num_part = f[2:].split('_')[0]
-                    num = int(num_part)
-                    if num > max_id: max_id = num
-                except: continue
+        try:
+            for f in os.listdir(folder_path):
+                if f.startswith("id") and "_" in f:
+                    try:
+                        num = int(f[2:].split('_')[0])
+                        if num > max_id: max_id = num
+                    except: continue
+        except: pass
         return max_id
 
     @staticmethod
     def compress_for_web(path, quality):
+        """Compresses image to BytesIO for Streamlit display."""
         try:
             with Image.open(path) as img:
                 buf = BytesIO()
@@ -46,6 +53,7 @@ class SorterEngine:
 
     @staticmethod
     def execute_move(t_path, c_path, t_folder, c_folder, prefix, mode="standard"):
+        """Moves target and copies control into subfolders."""
         t_fname = f"{prefix}{os.path.basename(t_path)}"
         c_fname = f"{prefix}{os.path.basename(c_path)}"
         subdirs = {
@@ -62,6 +70,7 @@ class SorterEngine:
 
     @staticmethod
     def revert_action(action):
+        """Reverses the last filesystem action."""
         if action['type'] in ['link_standard', 'link_solo']:
             if os.path.exists(action['t_dst']): shutil.move(action['t_dst'], action['t_src'])
             if os.path.exists(action['c_dst']): os.remove(action['c_dst'])
@@ -69,8 +78,17 @@ class SorterEngine:
             if os.path.exists(action['t_dst']): shutil.move(action['t_dst'], action['t_src'])
             if os.path.exists(action['c_dst']): shutil.move(action['c_dst'], action['c_src'])
 
+    @staticmethod
+    def save_favorite(name, path_t, path_c):
+        """Saves a path pair to the JSON config."""
+        favs = SorterEngine.load_favorites()
+        favs[name] = {"target": path_t, "control": path_c}
+        with open(SorterEngine.CONFIG_PATH, 'w') as f:
+            json.dump(favs, f)
+
     @staticmethod
     def load_favorites():
+        """Loads path pairs from the JSON config."""
         if os.path.exists(SorterEngine.CONFIG_PATH):
             with open(SorterEngine.CONFIG_PATH, 'r') as f: return json.load(f)
         return {}