core: only show user delete button if an unenrollment flow exists

passbook/core/templates/user/settings.html

@@ -17,7 +17,9 @@
                     <div class="pf-c-form__horizontal-group">
                         <div class="pf-c-form__actions">
                             <input class="pf-c-button pf-m-primary" type="submit" value="{% trans 'Update' %}" />
+                            {% if unenrollment_enabled %}
                             <a class="pf-c-button pf-m-danger" href="{% url 'passbook_flows:default-unenrollment' %}?back={{ request.get_full_path }}">{% trans "Delete account" %}</a>
+                            {% endif %}
                         </div>
                     </div>
                 </div>

passbook/core/views/user.py

@@ -1,4 +1,6 @@
 """passbook core user views"""
+from typing import Any, Dict
+
 from django.contrib.auth.mixins import LoginRequiredMixin
 from django.contrib.messages.views import SuccessMessageMixin
 from django.urls import reverse_lazy
@@ -6,6 +8,7 @@ from django.utils.translation import gettext as _
 from django.views.generic import UpdateView
 
 from passbook.core.forms.users import UserDetailForm
+from passbook.flows.models import Flow, FlowDesignation
 
 
 class UserSettingsView(SuccessMessageMixin, LoginRequiredMixin, UpdateView):
@@ -19,3 +22,11 @@ class UserSettingsView(SuccessMessageMixin, LoginRequiredMixin, UpdateView):
 
     def get_object(self):
         return self.request.user
+
+    def get_context_data(self, **kwargs: Dict[str, Any]) -> Dict[str, Any]:
+        kwargs = super().get_context_data(**kwargs)
+        unenrollment_flow = Flow.with_policy(
+            self.request, designation=FlowDesignation.UNRENOLLMENT
+        )
+        kwargs["unenrollment_enabled"] = bool(unenrollment_flow)
+        return kwargs