Add pagination to dataset gallery (50 per page, newest first)

alpr-service/main.py

@@ -227,14 +227,34 @@ def dataset_count():
 
 @app.route("/dataset/list")
 def dataset_list():
-    """Lista todas las imágenes del dataset"""
+    """Lista las imágenes del dataset con paginación"""
+    from flask import request
+    
     try:
+        page = int(request.args.get('page', 1))
+        per_page = int(request.args.get('per_page', 50))
+        
         files = [f for f in os.listdir(DATASET_DIR) if f.endswith('.jpg')]
-        # Ordenar por fecha (más recientes primero)
-        files.sort(reverse=True)
+        
+        # Ordenar por fecha de modificación (más recientes primero)
+        files_with_time = []
+        for f in files:
+            filepath = os.path.join(DATASET_DIR, f)
+            mtime = os.path.getmtime(filepath)
+            files_with_time.append((f, mtime))
+        
+        files_with_time.sort(key=lambda x: x[1], reverse=True)
+        sorted_files = [f[0] for f in files_with_time]
+        
+        # Paginación
+        total = len(sorted_files)
+        total_pages = (total + per_page - 1) // per_page
+        start = (page - 1) * per_page
+        end = start + per_page
+        page_files = sorted_files[start:end]
         
         images = []
-        for f in files[:50]:  # Limitar a últimas 50
+        for f in page_files:
             parts = f.replace('.jpg', '').split('_')
             plate = parts[0] if parts else 'Unknown'
             images.append({
@@ -243,7 +263,13 @@ def dataset_list():
                 'url': f'/dataset/images/{f}'
             })
         
-        return {"images": images, "total": len(files)}
+        return {
+            "images": images, 
+            "total": total,
+            "page": page,
+            "per_page": per_page,
+            "total_pages": total_pages
+        }
     except Exception as e:
         return {"images": [], "total": 0, "error": str(e)}