Add workflow deletion view

wagtail/admin/templates/wagtailadmin/workflows/confirm_delete.html

@@ -0,0 +1,17 @@
+{% extends "wagtailadmin/base.html" %}
+{% load i18n %}
+{% block titletag %}{{ view.page_title }}{% endblock %}
+
+{% block content %}
+    {% include "wagtailadmin/shared/header.html" with title=view.page_title subtitle=view.get_page_subtitle icon=view.header_icon %}
+
+    <div class="nice-padding">
+        <p>This workflow is currently in progress on {{ workflow_states_in_progress }} pages. Deleting this workflow will cancel moderation on these page.
+        Are you sure you want to delete this workflow?</p>
+        <form action="{{ view.get_delete_url }}" method="POST">
+            {% csrf_token %}
+            <input type="submit" value="{% trans 'Yes, delete' %}" class="button serious" />
+            <a class="button button-secondary" href="{{ view.get_edit_url }}">No</a>
+        </form>
+    </div>
+{% endblock %}

wagtail/admin/templates/wagtailadmin/workflows/edit.html

@@ -30,10 +30,13 @@
         <div class="object">
             <ul class="object-layout">
                 <li class="object-layout_big-part">
-                    <p class="save">
+                    <p class="actions">
                         <button type="submit" class="button action-save button-longrunning" data-clicked-text="{% trans 'Saving…' %}">
                             <span class="icon icon-spinner"></span><em>{% trans 'Save' %}</em>
                         </button>
+                        {% if can_delete %}
+                        <a href="{{ view.get_delete_url }}" class="button button-secondary no">{{ view.delete_item_label }}</a>
+                    {% endif %}
                     </p>
                 </li>
             </ul>

wagtail/admin/urls/workflows.py

@@ -7,6 +7,7 @@ app_name = 'wagtailadmin_workflows'
 urlpatterns = [
     path('', workflows.Index.as_view(), name='index'),
     path('add/', workflows.Create.as_view(), name='add'),
+    path('delete/<int:pk>/', workflows.Delete.as_view(), name='delete'),
     path('edit/<int:pk>/', workflows.Edit.as_view(), name='edit'),
     path('remove/<int:page_pk>/', workflows.remove_workflow, name='remove'),
     path('remove/<int:page_pk>/<int:workflow_pk>/', workflows.remove_workflow, name='remove'),

wagtail/admin/views/workflows.py

@@ -12,7 +12,7 @@ from wagtail.admin import messages
 from wagtail.admin.edit_handlers import Workflow
 from wagtail.admin.forms.workflows import AddWorkflowToPageForm
 from wagtail.admin.views.generic import CreateView, DeleteView, EditView, IndexView
-from wagtail.core.models import Page, Task, WorkflowPage, WorkflowTask
+from wagtail.core.models import Page, Task, WorkflowPage, WorkflowState, WorkflowTask
 from wagtail.admin.views.pages import get_valid_next_url_from_request
 from wagtail.core.permissions import workflow_permission_policy, task_permission_policy
 from django.shortcuts import get_object_or_404, redirect, render
@@ -70,6 +70,7 @@ class Edit(EditView):
     success_message = _("Workflow '{0}' updated.")
     add_url_name = 'wagtailadmin_workflows:add'
     edit_url_name = 'wagtailadmin_workflows:edit'
+    delete_url_name = 'wagtailadmin_workflows:delete'
     index_url_name = 'wagtailadmin_workflows:index'
     header_icon = 'placeholder'
     edit_handler = None
@@ -104,6 +105,25 @@ class Edit(EditView):
         return context
 
 
+class Delete(DeleteView):
+    permission_policy = workflow_permission_policy
+    model = Workflow
+    page_title = _("Delete workflow")
+    template_name = 'wagtailadmin/workflows/confirm_delete.html'
+    success_message = _("Workflow '{0}' deleted.")
+    add_url_name = 'wagtailadmin_workflows:add'
+    edit_url_name = 'wagtailadmin_workflows:edit'
+    delete_url_name = 'wagtailadmin_workflows:delete'
+    index_url_name = 'wagtailadmin_workflows:index'
+    header_icon = 'placeholder'
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context['workflow_states_in_progress'] = WorkflowState.objects.filter(status=WorkflowState.STATUS_IN_PROGRESS).count()
+        return context
+
+
+
 @require_POST
 def remove_workflow(request, page_pk, workflow_pk=None):
     # Remove a workflow from a page (specifically a single workflow if workflow_pk is set)