BETTERZON-151: Adding option to delete price alarm (#94)

Backend/src/models/pricealarms/pricealarms.router.ts

@@ -106,3 +106,29 @@ pricealarmsRouter.put('/', async (req: Request, res: Response) => {
         res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
     }
 });
+
+// DELETE pricealarms/:id
+pricealarmsRouter.delete('/:id', async (req, res) => {
+    try {
+        // Authenticate user
+        const user_ip = req.connection.remoteAddress ?? '';
+        const session_id = (req.query.session_id ?? '').toString();
+        const session_key = (req.query.session_key ?? '').toString();
+        const user = await UserService.checkSession(session_id, session_key, user_ip);
+
+        const id: number = parseInt(req.params.id, 10);
+
+        const success = await PriceAlarmsService.deletePriceAlarm(id, user.user_id);
+
+        if (success) {
+            res.status(200).send(JSON.stringify({success: true}));
+            return;
+        } else {
+            res.status(500).send(JSON.stringify({success: false}));
+            return;
+        }
+    } catch (e) {
+        console.log('Error handling a request: ' + e.message);
+        res.status(500).send(JSON.stringify({'message': 'Internal Server Error. Try again later.'}));
+    }
+});

Backend/src/models/pricealarms/pricealarms.service.ts

@@ -92,3 +92,24 @@ export const updatePriceAlarm = async (alarm_id: number, user_id: number, define
         }
     }
 };
+
+/**
+ * Deletes the given price alarm
+ * @param alarm_id The id of the price alarm to update
+ * @param user_id The id of the user that wants to update the price alarm
+ */
+export const deletePriceAlarm = async (alarm_id: number, user_id: number): Promise<boolean> => {
+    let conn;
+    try {
+        conn = await pool.getConnection();
+        const res = await conn.query('DELETE FROM price_alarms WHERE alarm_id = ? AND user_id = ?', [alarm_id, user_id]);
+
+        return res.affectedRows === 1;
+    } catch (err) {
+        throw err;
+    } finally {
+        if (conn) {
+            conn.end();
+        }
+    }
+};