Integrate WhatsApp Gateway for mail notifications

lib/whatsapp.ts

@@ -0,0 +1,35 @@
+/**
+ * lib/whatsapp.ts
+ * Centralized service to send WhatsApp messages via AyrisTech WhatsApp Worker.
+ */
+
+export async function sendWA(to: string, message: string, userId: string = 'mustafa_yildiz') {
+  try {
+    const workerUrl = process.env.WHATSAPP_WORKER_URL;
+    const secret = process.env.WHATSAPP_SECRET;
+
+    if (!workerUrl || !secret) {
+      console.error('[WhatsApp] Missing environment variables (URL or Secret)');
+      return { success: false, error: 'Config missing' };
+    }
+
+    const response = await fetch(`${workerUrl}/send-message`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        secret,
+        userId,
+        to,
+        message
+      }),
+    });
+
+    const data = await response.json();
+    if (!response.ok) throw new Error(data.error || 'Mesaj gönderilemedi');
+    
+    return { success: true, data };
+  } catch (error) {
+    console.error('WhatsApp Error:', error);
+    return { success: false, error: error instanceof Error ? error.message : 'Bilinmeyen hata' };
+  }
+}