👷 Add vercel function to benefit from waitUntil method for WA webhook

apps/builder/api/v1/whatsapp/preview/webhook.ts

@@ -0,0 +1,41 @@
+import {
+  WhatsAppWebhookRequestBody,
+  whatsAppWebhookRequestBodySchema,
+} from '@typebot.io/schemas/features/whatsapp'
+import { resumeWhatsAppFlow } from '@typebot.io/bot-engine/whatsapp/resumeWhatsAppFlow'
+import { isNotDefined } from '@typebot.io/lib'
+import { env } from '@typebot.io/env'
+import type { RequestContext } from '@vercel/edge'
+
+const processWhatsAppReply = async (
+  entry: WhatsAppWebhookRequestBody['entry']
+) => {
+  const receivedMessage = entry.at(0)?.changes.at(0)?.value.messages?.at(0)
+  if (isNotDefined(receivedMessage)) return { message: 'No message found' }
+  const contactName =
+    entry.at(0)?.changes.at(0)?.value?.contacts?.at(0)?.profile?.name ?? ''
+  const contactPhoneNumber =
+    entry.at(0)?.changes.at(0)?.value?.messages?.at(0)?.from ?? ''
+  return resumeWhatsAppFlow({
+    receivedMessage,
+    sessionId: `wa-preview-${receivedMessage.from}`,
+    contact: {
+      name: contactName,
+      phoneNumber: contactPhoneNumber,
+    },
+  })
+}
+
+export async function POST(request: Request, context: RequestContext) {
+  if (!env.WHATSAPP_PREVIEW_FROM_PHONE_NUMBER_ID)
+    return new Response(
+      'WHATSAPP_PREVIEW_FROM_PHONE_NUMBER_ID is not defined',
+      {
+        status: 500,
+      }
+    )
+  const body = await request.json()
+  const { entry } = whatsAppWebhookRequestBodySchema.parse(body)
+  context.waitUntil(processWhatsAppReply(entry))
+  return new Response('Message is being processed.', { status: 200 })
+}