Add alerts to deleting domain invitations

src/registrar/admin.py

@@ -1507,6 +1507,8 @@ class DomainInvitationAdmin(BaseInvitationAdmin):
     autocomplete_fields = ["domain"]
 
     change_form_template = "django/admin/domain_invitation_change_form.html"
+    # Override for the delete confirmation page on the domain table (bulk delete action)
+    delete_selected_confirmation_template = "django/admin/domain_invitation_delete_selected_confirmation.html"
 
     # Select domain invitations to change -> Domain invitations
     def changelist_view(self, request, extra_context=None):
@@ -1515,6 +1517,17 @@ class DomainInvitationAdmin(BaseInvitationAdmin):
         extra_context["tabtitle"] = "Domain invitations"
         # Get the filtered values
         return super().changelist_view(request, extra_context=extra_context)
+        
+
+    def delete_view(self, request, object_id, extra_context=None):
+        """
+        Custom delete_view to perform additional actions or customize the template.
+        """
+        # Set the delete template to a custom one
+        self.delete_confirmation_template = "django/admin/domain_invitation_delete_confirmation.html"
+        response = super().delete_view(request, object_id, extra_context=extra_context)
+
+        return response
 
     def save_model(self, request, obj, form, change):
         """

src/registrar/templates/django/admin/domain_invitation_delete_confirmation.html

@@ -0,0 +1,16 @@
+{% extends 'admin/delete_confirmation.html' %}
+{% load i18n static %}
+
+{% block content_subtitle %}
+    <div class="usa-alert usa-alert--info usa-alert--slim margin-bottom-2" role="alert">
+        <div class="usa-alert__body margin-left-1 maxw-none">
+            <p class="usa-alert__text maxw-none">
+                If you cancel the domain invitation here, it won't trigger any emails. It also won't remove 
+                their domain management privileges if they already have that role assigned. Go to the 
+                <a class="usa-link" href="{% url 'admin:registrar_domaininvitation_changelist' %}">User Domain Roles table</a> 
+                if you want to remove the user from a domain.
+            </p>
+        </div>
+    </div>
+    {{ block.super }}
+{% endblock %}

src/registrar/templates/django/admin/domain_invitation_delete_selected_confirmation.html

@@ -0,0 +1,16 @@
+{% extends 'admin/delete_selected_confirmation.html' %}
+{% load i18n static %}
+
+{% block content_subtitle %}
+    <div class="usa-alert usa-alert--info usa-alert--slim margin-bottom-2" role="alert">
+        <div class="usa-alert__body margin-left-1 maxw-none">
+            <p class="usa-alert__text maxw-none">
+                If you cancel the domain invitation here, it won't trigger any emails. It also won't remove 
+                their domain management privileges if they already have that role assigned. Go to the 
+                <a class="usa-link" href="{% url 'admin:registrar_domaininvitation_changelist' %}">User Domain Roles table</a> 
+                if you want to remove the user from a domain.
+            </p>
+        </div>
+    </div>
+    {{ block.super }}
+{% endblock %}