fix lag listing large file lists

app.py

@@ -80,46 +80,36 @@ def list_directory_contents(directory, subpath):
     allowed_image_exts = ('.jpg', '.jpeg', '.png', '.gif', '.bmp')
     
     try:
-        for item in sorted(os.listdir(directory)):
+        with os.scandir(directory) as it:
-            # Skip hidden folders and files starting with a dot.
+            # Sorting by name if required.
-            if item.startswith('.'):
+            for entry in sorted(it, key=lambda e: e.name):
+                # Skip hidden files and directories.
+                if entry.name.startswith('.'):
                     continue
 
-            full_path = os.path.join(directory, item)
+                if entry.is_dir(follow_symlinks=False):
-            # Process directories.
+                    if entry.name in ["Transkription", "@eaDir"]:
-            if os.path.isdir(full_path):
-                # skip folder
-                skip_folder = ["Transkription", "@eaDir"]
-                if item in skip_folder:
                         continue
-                rel_path = os.path.join(subpath, item) if subpath else item
+                    rel_path = os.path.join(subpath, entry.name) if subpath else entry.name
-                rel_path = rel_path.replace(os.sep, '/')
+                    directories.append({'name': entry.name, 'path': rel_path.replace(os.sep, '/')})
-                directories.append({'name': item, 'path': rel_path})
+                elif entry.is_file(follow_symlinks=False):
-            # Process files: either music or image files.
+                    lower_name = entry.name.lower()
-            elif os.path.isfile(full_path) and (
+                    if lower_name.endswith(allowed_music_exts) or lower_name.endswith(allowed_image_exts):
-                item.lower().endswith(allowed_music_exts) or item.lower().endswith(allowed_image_exts)
+                        rel_path = os.path.join(subpath, entry.name) if subpath else entry.name
-            ):
+                        if lower_name.endswith(allowed_music_exts):
-                rel_path = os.path.join(subpath, item) if subpath else item
-                rel_path = rel_path.replace(os.sep, '/')
-                
-                # Determine the file type.
-                if item.lower().endswith(allowed_music_exts):
                             file_type = 'music'
                         else:
                             file_type = 'image'
-                    
+                        file_entry = {'name': entry.name, 'path': rel_path.replace(os.sep, '/'), 'file_type': file_type}
-                file_entry = {'name': item, 'path': rel_path, 'file_type': file_type}
+                        # Only check for transcription if it's a audio file.
-                
-                # Only check for transcription if it's a music file.
                         if file_type == 'music' and transcription_exists:
-                    base_name = os.path.splitext(item)[0]
+                            base_name = os.path.splitext(entry.name)[0]
                             transcript_filename = base_name + '.md'
                             transcript_path = os.path.join(transcription_dir, transcript_filename)
                             if os.path.isfile(transcript_path):
                                 file_entry['has_transcript'] = True
                                 transcript_rel_path = os.path.join(subpath, "Transkription", transcript_filename) if subpath else os.path.join("Transkription", transcript_filename)
-                        transcript_rel_path = transcript_rel_path.replace(os.sep, '/')
+                                file_entry['transcript_url'] = url_for('get_transcript', subpath=transcript_rel_path.replace(os.sep, '/'))
-                        file_entry['transcript_url'] = url_for('get_transcript', subpath=transcript_rel_path)
                             else:
                                 file_entry['has_transcript'] = False
                         else:
@@ -127,8 +117,10 @@ def list_directory_contents(directory, subpath):
                         files.append(file_entry)
     except PermissionError:
         pass
+
     return directories, files
 
+
 def generate_breadcrumbs(subpath=None):
     breadcrumbs = [{'name': 'Home', 'path': ''}]
     if subpath: