fixed few errors

app.py

@@ -14,6 +14,8 @@ from sklearn.naive_bayes import MultinomialNB
 import numpy as np
 import joblib
 import base64
+from werkzeug.utils import secure_filename
+from flask_sqlalchemy import SQLAlchemy
 
 # HTML template with embedded JavaScript
 HTML_TEMPLATE = """
@@ -318,6 +320,7 @@ class EnhancedDocProcessor:
         return results
 
 app = Flask(__name__)
+db = SQLAlchemy(app)
 processor = EnhancedDocProcessor()
 
 @app.route('/')
@@ -333,14 +336,21 @@ def batch_process():
     user_id = request.form.get('user_id')
     
     file_paths = []
-    for file in files:
-        if file.filename.endswith('.pdf'):
-            temp_path = f"temp_{file.filename}"
-            file.save(temp_path)
-            file_paths.append(temp_path)
-    
+    temp_dir = '/tmp/batch_process'
+    os.makedirs(temp_dir, exist_ok=True)
+
     try:
+        for file in files:
+            if file.filename.endswith('.pdf'):
+                filename = secure_filename(file.filename)
+                temp_path = os.path.join(temp_dir, filename)
+                file.save(temp_path)
+                file_paths.append(temp_path)
+        
+        processor = EnhancedDocProcessor(db, app.config['UPLOAD_FOLDER'], app.config['TEMP_FOLDER'])
         results = processor.process_batch(file_paths, user_id)
+    except PermissionError:
+        return jsonify({'error': 'Permission denied. Please check your permissions.'}), 403
     except Exception as e:
         return jsonify({'error': str(e)}), 500
     finally:
@@ -350,7 +360,8 @@ def batch_process():
                 os.remove(path)
             except:
                 pass
-                
+        shutil.rmtree(temp_dir)
+
     return jsonify(results)
 
 if __name__ == '__main__':