kb: add history system (#7915)

requirements.txt

@@ -3,3 +3,4 @@ gadjo
 django-select2
 django-ckeditor
 django-haystack
+django-reversion

setup.py

@@ -102,6 +102,7 @@ setup(
         'django-select2',
         'django-ckeditor',
         'django-haystack',
+        'django-reversion',
         ],
     zip_safe=False,
     cmdclass={

welco/kb/templates/kb/page_history.html

@@ -0,0 +1,17 @@
+{% extends "kb/base.html" %}
+{% load i18n %}
+
+{% block appbar %}
+<h2>{% trans 'Knowledge Base' %} - {{ object.title }}</h2>
+<a href="{% url 'kb-page-view' slug=object.slug %}">{% trans 'Back to page' %}</a>
+{% endblock %}
+
+{% block content %}
+
+<ul>
+{% for version in versions_list %}
+<li>{{ version.revision.date_created }}, <a href="{% url 'kb-page-version' slug=object.slug version=version.id %}">{% trans 'view' %}</a></li>
+{% endfor %}
+</ul>
+
+{% endblock %}

welco/kb/templates/kb/page_version.html

@@ -0,0 +1,24 @@
+{% extends "kb/page_detail.html" %}
+{% load i18n %}
+
+{% block appbar %}
+<h2>{% trans 'Knowledge Base' %} - {{ object.title }}</h2>
+<a href="{% url 'kb-page-view' slug=object.slug %}">{% trans 'Back to page' %}</a>
+<a href="{% url 'kb-page-history' slug=object.slug %}">{% trans 'History' %}</a>
+{% endblock %}
+
+{% block content %}
+
+<p>
+{% trans 'Warning: this is an old version of this page.' %}
+</p>
+
+<form method="POST">
+  {% csrf_token %}
+  <button>{% trans 'Revert to this version' %}</button>
+</form>
+
+{{block.super}}
+
+{% endblock %}
+