template

backend/app/whatsapp_graph_client.py

@@ -104,6 +104,30 @@ class WhatsAppGraphClient:
             payload["context"] = {"message_id": reply_to}
         return await self._send_message(payload)
 
+    async def upload_media(self, filename: str, content_type: str, data: bytes) -> str:
+        """Upload a file for a template header. Returns a media id that one send can use."""
+        if not self.configured:
+            raise WhatsAppGraphError("WhatsApp Graph API is not configured", status_code=503)
+        url = self._graph_url(f"{self.phone_number_id}/media")
+        async with httpx.AsyncClient(timeout=120.0) as client:
+            response = await client.post(
+                url,
+                data={"messaging_product": "whatsapp", "type": content_type},
+                files={"file": (filename or "header", data, content_type)},
+                headers={"Authorization": f"Bearer {self.access_token}"},
+            )
+        try:
+            body = response.json()
+        except ValueError:
+            body = {}
+        if response.status_code >= 400:
+            detail = body.get("error", {}).get("message") if isinstance(body, dict) else response.text
+            raise WhatsAppGraphError(detail or "Meta did not accept the header file", status_code=response.status_code)
+        media_id = str(body.get("id") or "") if isinstance(body, dict) else ""
+        if not media_id:
+            raise WhatsAppGraphError("Meta did not return a media id for the header file", status_code=502)
+        return media_id
+
     async def send_template(
         self,
         to: str,