Add ntfy.sh notification support

- Add ntfy_topic and ntfy_enabled columns to database
- Add sendNtfyNotification function with emoji tags
- Add /settings/notifications/test/ntfy endpoint
- Add ntfy section in Settings UI with topic input
- Show ntfy badge in ProductDetail notification status

ntfy.sh is a free, simple notification service - no account needed.
Users just pick a topic name and subscribe in the ntfy app.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/index.ts

@@ -52,6 +52,12 @@ async function runMigrations() {
         IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'users' AND column_name = 'ollama_model') THEN
           ALTER TABLE users ADD COLUMN ollama_model TEXT;
         END IF;
+        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'users' AND column_name = 'ntfy_topic') THEN
+          ALTER TABLE users ADD COLUMN ntfy_topic TEXT;
+        END IF;
+        IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'users' AND column_name = 'ntfy_enabled') THEN
+          ALTER TABLE users ADD COLUMN ntfy_enabled BOOLEAN DEFAULT true;
+        END IF;
       END $$;
     `);
 

backend/src/models/index.ts

@@ -30,6 +30,8 @@ export interface NotificationSettings {
   pushover_user_key: string | null;
   pushover_app_token: string | null;
   pushover_enabled: boolean;
+  ntfy_topic: string | null;
+  ntfy_enabled: boolean;
 }
 
 export interface AISettings {
@@ -70,7 +72,8 @@ export const userQueries = {
     const result = await pool.query(
       `SELECT telegram_bot_token, telegram_chat_id, COALESCE(telegram_enabled, true) as telegram_enabled,
               discord_webhook_url, COALESCE(discord_enabled, true) as discord_enabled,
-              pushover_user_key, pushover_app_token, COALESCE(pushover_enabled, true) as pushover_enabled
+              pushover_user_key, pushover_app_token, COALESCE(pushover_enabled, true) as pushover_enabled,
+              ntfy_topic, COALESCE(ntfy_enabled, true) as ntfy_enabled
        FROM users WHERE id = $1`,
       [id]
     );
@@ -117,6 +120,14 @@ export const userQueries = {
       fields.push(`pushover_enabled = $${paramIndex++}`);
       values.push(settings.pushover_enabled);
     }
+    if (settings.ntfy_topic !== undefined) {
+      fields.push(`ntfy_topic = $${paramIndex++}`);
+      values.push(settings.ntfy_topic);
+    }
+    if (settings.ntfy_enabled !== undefined) {
+      fields.push(`ntfy_enabled = $${paramIndex++}`);
+      values.push(settings.ntfy_enabled);
+    }
 
     if (fields.length === 0) return null;
 
@@ -125,7 +136,8 @@ export const userQueries = {
       `UPDATE users SET ${fields.join(', ')} WHERE id = $${paramIndex}
        RETURNING telegram_bot_token, telegram_chat_id, COALESCE(telegram_enabled, true) as telegram_enabled,
                  discord_webhook_url, COALESCE(discord_enabled, true) as discord_enabled,
-                 pushover_user_key, pushover_app_token, COALESCE(pushover_enabled, true) as pushover_enabled`,
+                 pushover_user_key, pushover_app_token, COALESCE(pushover_enabled, true) as pushover_enabled,
+                 ntfy_topic, COALESCE(ntfy_enabled, true) as ntfy_enabled`,
       values
     );
     return result.rows[0] || null;

backend/src/routes/settings.ts

@@ -27,6 +27,8 @@ router.get('/notifications', async (req: AuthRequest, res: Response) => {
       pushover_user_key: settings.pushover_user_key || null,
       pushover_app_token: settings.pushover_app_token || null,
       pushover_enabled: settings.pushover_enabled ?? true,
+      ntfy_topic: settings.ntfy_topic || null,
+      ntfy_enabled: settings.ntfy_enabled ?? true,
     });
   } catch (error) {
     console.error('Error fetching notification settings:', error);
@@ -47,6 +49,8 @@ router.put('/notifications', async (req: AuthRequest, res: Response) => {
       pushover_user_key,
       pushover_app_token,
       pushover_enabled,
+      ntfy_topic,
+      ntfy_enabled,
     } = req.body;
 
     const settings = await userQueries.updateNotificationSettings(userId, {
@@ -58,6 +62,8 @@ router.put('/notifications', async (req: AuthRequest, res: Response) => {
       pushover_user_key,
       pushover_app_token,
       pushover_enabled,
+      ntfy_topic,
+      ntfy_enabled,
     });
 
     if (!settings) {
@@ -74,6 +80,8 @@ router.put('/notifications', async (req: AuthRequest, res: Response) => {
       pushover_user_key: settings.pushover_user_key || null,
       pushover_app_token: settings.pushover_app_token || null,
       pushover_enabled: settings.pushover_enabled ?? true,
+      ntfy_topic: settings.ntfy_topic || null,
+      ntfy_enabled: settings.ntfy_enabled ?? true,
       message: 'Notification settings updated successfully',
     });
   } catch (error) {
@@ -186,6 +194,38 @@ router.post('/notifications/test/pushover', async (req: AuthRequest, res: Respon
   }
 });
 
+// Test ntfy notification
+router.post('/notifications/test/ntfy', async (req: AuthRequest, res: Response) => {
+  try {
+    const userId = req.userId!;
+    const settings = await userQueries.getNotificationSettings(userId);
+
+    if (!settings?.ntfy_topic) {
+      res.status(400).json({ error: 'ntfy not configured' });
+      return;
+    }
+
+    const { sendNtfyNotification } = await import('../services/notifications');
+    const success = await sendNtfyNotification(settings.ntfy_topic, {
+      productName: 'Test Product',
+      productUrl: 'https://example.com',
+      type: 'price_drop',
+      oldPrice: 29.99,
+      newPrice: 19.99,
+      currency: 'USD',
+    });
+
+    if (success) {
+      res.json({ message: 'Test notification sent successfully' });
+    } else {
+      res.status(500).json({ error: 'Failed to send test notification' });
+    }
+  } catch (error) {
+    console.error('Error sending test ntfy notification:', error);
+    res.status(500).json({ error: 'Failed to send test notification' });
+  }
+});
+
 // Get AI settings
 router.get('/ai', async (req: AuthRequest, res: Response) => {
   try {

backend/src/services/notifications.ts

@@ -195,6 +195,52 @@ export async function sendPushoverNotification(
   }
 }
 
+export async function sendNtfyNotification(
+  topic: string,
+  payload: NotificationPayload
+): Promise<boolean> {
+  try {
+    const currencySymbol = getCurrencySymbol(payload.currency);
+
+    let title: string;
+    let message: string;
+    let tags: string[];
+
+    if (payload.type === 'price_drop') {
+      const oldPriceStr = payload.oldPrice ? `${currencySymbol}${payload.oldPrice.toFixed(2)}` : 'N/A';
+      const newPriceStr = payload.newPrice ? `${currencySymbol}${payload.newPrice.toFixed(2)}` : 'N/A';
+      title = 'Price Drop Alert!';
+      message = `${payload.productName}\n\nPrice dropped from ${oldPriceStr} to ${newPriceStr}`;
+      tags = ['moneybag', 'chart_with_downwards_trend'];
+    } else if (payload.type === 'target_price') {
+      const newPriceStr = payload.newPrice ? `${currencySymbol}${payload.newPrice.toFixed(2)}` : 'N/A';
+      const targetPriceStr = payload.targetPrice ? `${currencySymbol}${payload.targetPrice.toFixed(2)}` : 'N/A';
+      title = 'Target Price Reached!';
+      message = `${payload.productName}\n\nPrice is now ${newPriceStr} (your target: ${targetPriceStr})`;
+      tags = ['dart', 'white_check_mark'];
+    } else {
+      const priceStr = payload.newPrice ? ` at ${currencySymbol}${payload.newPrice.toFixed(2)}` : '';
+      title = 'Back in Stock!';
+      message = `${payload.productName}\n\nThis item is now available${priceStr}`;
+      tags = ['package', 'tada'];
+    }
+
+    await axios.post(`https://ntfy.sh/${topic}`, message, {
+      headers: {
+        'Title': title,
+        'Tags': tags.join(','),
+        'Click': payload.productUrl,
+      },
+    });
+
+    console.log(`ntfy notification sent to topic ${topic}`);
+    return true;
+  } catch (error) {
+    console.error('Failed to send ntfy notification:', error);
+    return false;
+  }
+}
+
 export async function sendNotifications(
   settings: {
     telegram_bot_token: string | null;
@@ -205,6 +251,8 @@ export async function sendNotifications(
     pushover_user_key: string | null;
     pushover_app_token: string | null;
     pushover_enabled?: boolean;
+    ntfy_topic: string | null;
+    ntfy_enabled?: boolean;
   },
   payload: NotificationPayload
 ): Promise<void> {
@@ -227,5 +275,9 @@ export async function sendNotifications(
     );
   }
 
+  if (settings.ntfy_topic && settings.ntfy_enabled !== false) {
+    promises.push(sendNtfyNotification(settings.ntfy_topic, payload));
+  }
+
   await Promise.allSettled(promises);
 }