Fix erroring-responses on oddly-used endpoints. (#167)

* Fix bug where approver appeared to be able to aprove a service twice.

Then got an error if they actually did it.

* Handle request_decide POST when request has already been actioned.

* post not get.

* Pass in service to redirect_to_service.

* Return the redirect correctly.

jasmin_services/views/grant_review.py

@@ -41,7 +41,7 @@ def grant_review(request, pk):
         and not request.user.has_perm(permission, grant.access.role)
     ):
         messages.error(request, "Grant does not exist")
-        return redirect_to_service(grant.role.service, "service_details")
+        return redirect_to_service(grant.access.role.service, "service_details")
     # If the grant is expired or revoked, redirect to the list of users
     if not grant.active or grant.expired or grant.revoked:
         messages.info(request, "This grant has already been rekoved or expired")

jasmin_services/views/request_decide.py

@@ -1,6 +1,8 @@
 import asgiref.sync
 import django.contrib.auth.mixins
+import django.contrib.messages
 import django.db
+import django.http
 import django.urls
 import django.views.generic.edit
 
@@ -32,6 +34,27 @@ def setup(self, request, *args, **kwargs):
             self.object.access.role.service.category.name, self.object.access.role.service.name
         )
 
+    def request_already_actioned(self, request):
+        """Generate a response for the case where the request has already been actioned."""
+        django.contrib.messages.add_message(
+            request, django.contrib.messages.INFO, "The request has already been approved."
+        )
+        return django.http.HttpResponseRedirect(
+            f"/services/{self.service.category.name}/{self.service.name}/requests/"
+        )
+
+    def get(self, request, *args, **kwargs):
+        """Override get to deal with case where request has been actioned already."""
+        if self.object.state != "PENDING":
+            return self.request_already_actioned(request)
+        return super().get(request, *args, **kwargs)
+
+    def post(self, request, *args, **kwargs):
+        """Override post to deal with case where request has been actioned already."""
+        if self.object.state != "PENDING":
+            return self.request_already_actioned(request)
+        return super().post(request, *args, **kwargs)
+
     def test_func(self):
         """Define the test for the UserPassesTestMixin.