final stage of the app

app/utils/data_manager.py

@@ -0,0 +1,58 @@
+"""
+Data storage utilities for QR codes
+"""
+
+import uuid
+from datetime import datetime
+
+# In-memory storage for QR codes (in production, use a database)
+qr_codes_db = {}
+
+class QRDataManager:
+    def __init__(self):
+        pass
+    
+    def save_qr_record(self, qr_type, content, settings, image_data, page_id=None):
+        """Save QR code record to database"""
+        qr_id = str(uuid.uuid4())
+        qr_record = {
+            'id': qr_id,
+            'type': qr_type,
+            'content': content,
+            'settings': settings,
+            'created_at': datetime.now().isoformat(),
+            'image_data': image_data
+        }
+        
+        if page_id:
+            qr_record['page_id'] = page_id
+            
+        qr_codes_db[qr_id] = qr_record
+        return qr_id
+    
+    def get_qr_record(self, qr_id):
+        """Get QR code record"""
+        return qr_codes_db.get(qr_id)
+    
+    def delete_qr_record(self, qr_id):
+        """Delete QR code record"""
+        if qr_id in qr_codes_db:
+            del qr_codes_db[qr_id]
+            return True
+        return False
+    
+    def list_qr_codes(self):
+        """List all QR codes"""
+        qr_list = []
+        for qr_id, qr_data in qr_codes_db.items():
+            qr_list.append({
+                'id': qr_id,
+                'type': qr_data['type'],
+                'created_at': qr_data['created_at'],
+                'preview': f'data:image/png;base64,{qr_data["image_data"]}'
+            })
+        return qr_list
+    
+    def qr_exists(self, qr_id):
+        """Check if QR code exists"""
+        return qr_id in qr_codes_db