feat(contacts): store contact submissions

apps/contacts/api/views.py

@@ -0,0 +1,40 @@
+from drf_spectacular.utils import extend_schema
+from rest_framework import status
+from rest_framework.permissions import AllowAny
+from rest_framework.response import Response
+from rest_framework.views import APIView
+
+from apps.contacts.api.serializers import (
+    ContactSubmissionCreateSerializer,
+    ContactSubmissionResponseSerializer,
+)
+from apps.contacts.api.throttles import ContactSubmissionThrottle
+
+
+def _get_client_ip(request):
+    forwarded_for = request.META.get("HTTP_X_FORWARDED_FOR")
+    if forwarded_for:
+        return forwarded_for.split(",")[0].strip()
+    return request.META.get("REMOTE_ADDR")
+
+
+class ContactSubmissionView(APIView):
+    permission_classes = (AllowAny,)
+    throttle_classes = (ContactSubmissionThrottle,)
+    serializer_class = ContactSubmissionCreateSerializer
+
+    @extend_schema(
+        request=ContactSubmissionCreateSerializer,
+        responses={201: ContactSubmissionResponseSerializer},
+    )
+    def post(self, request):
+        serializer = self.serializer_class(data=request.data)
+        serializer.is_valid(raise_exception=True)
+        submission = serializer.save(
+            ip_address=_get_client_ip(request),
+            user_agent=request.META.get("HTTP_USER_AGENT", ""),
+        )
+        return Response(
+            ContactSubmissionResponseSerializer(submission).data,
+            status=status.HTTP_201_CREATED,
+        )