Cancel removed from retrieved invitations, cancel attempts on retrieved invitations errors

src/registrar/templates/domain_users.html

@@ -133,9 +133,11 @@
           <td data-sort-value="{{ invitation.created_at|date:"U" }}" data-label="Date created">{{ invitation.created_at|date }} </td>
           <td data-label="Status">{{ invitation.status|title }}</td>
           <td>
+            {% if invitation.status == invitation.DomainInvitationStatus.INVITED %}
             <form method="POST" action="{% url "invitation-delete" pk=invitation.id %}">
               {% csrf_token %}<input type="submit" class="usa-button--unstyled text-no-underline" value="Cancel">
             </form>
+            {% endif %}
           </td>
         </tr>
         {% endfor %}

src/registrar/views/domain.py

@@ -822,6 +822,18 @@ class DomainAddUserView(DomainFormBaseView):
 class DomainInvitationDeleteView(SuccessMessageMixin, DomainInvitationPermissionDeleteView):
     object: DomainInvitation  # workaround for type mismatch in DeleteView
 
+    def post(self, request, *args, **kwargs):
+        """Override post method in order to error in the case when the
+        domain invitation status is RETRIEVED"""
+        self.object = self.get_object()
+        form = self.get_form()
+        if form.is_valid() and self.object.status == self.object.DomainInvitationStatus.INVITED:
+            return self.form_valid(form)
+        else:
+            # Produce an error message if the domain invatation status is RETRIEVED
+            messages.error(request, f"Invitation to {self.object.email} has already been retrieved")
+            return HttpResponseRedirect(self.get_success_url())
+
     def get_success_url(self):
         return reverse("domain-users", kwargs={"pk": self.object.domain.id})