Refactor YOLO results endpoint to handle empty results and improve database insertion logic

src/Python/flask/web/app.py

@@ -162,19 +162,22 @@ def image():
 def yolo_results_endpoint():
     global yolo_results
     with lock:
-        return jsonify(yolo_results)
-    try:
-        data = json.loads(yolo_results)
-        db = get_db()
-        with db.cursor() as cursor:
-            sql_yolo = "INSERT INTO image (class, confidence) VALUES (%s, %s)"
-            cursor.executemany(sql_yolo, data)
-            db.commit()
-            cursor.close()
-    except json.JSONDecodeError as e:
-        print(f"JSON decode error: {e}")
-    except mysql.connector.Error as err:
-        print(f"Database error: {err}")
+        if yolo_results:
+            try:
+                data = json.loads(yolo_results)
+                db = get_db()
+                camera_data_tuples = [(item['class'], float(item['confidence'])) for item in data]
+                with db.cursor() as cursor:
+                    sql_yolo = "INSERT INTO image (object, confidence) VALUES (%s, %s)"
+                    cursor.executemany(sql_yolo, camera_data_tuples)
+                    db.commit()
+                    cursor.close()
+            except json.JSONDecodeError as e:
+                print(f"JSON decode error: {e}")
+            except mysql.connector.Error as err:
+                print(f"Database error: {err}")
+            return jsonify(yolo_results)
+
 
 
 if __name__ == '__main__':