manager: add link to export page snapshot (#62023)

combo/manager/templates/combo/page_history.html

@@ -21,6 +21,7 @@
 <li>{{ snapshot.timestamp }}, {{ snapshot.comment }}
     {% if snapshot.user %} ({{ snapshot.user.get_full_name }}){% endif %}
     — <a href="{% url 'combo-snapshot-view' pk=snapshot.id %}">{% trans "view" %}</a>
+    — <a href="{% url 'combo-manager-snapshot-export' page_pk=view.page.id pk=snapshot.id %}">{% trans "export" %}</a>
     — <a href="{% url 'combo-manager-snapshot-restore' page_pk=view.page.id pk=snapshot.id %}" rel="popup">{% trans "restore" %}</a>
 </li>
 {% endfor %}

combo/manager/urls.py

@@ -96,6 +96,11 @@ urlpatterns = [
         pages_admin_required(views.snapshot_restore),
         name='combo-manager-snapshot-restore',
     ),
+    url(
+        r'^pages/(?P<page_pk>\d+)/history/(?P<pk>\d+)/export$',
+        pages_admin_required(views.snapshot_export),
+        name='combo-manager-snapshot-export',
+    ),
     url(
         r'^pages/(?P<page_pk>\d+)/add-cell-to-(?P<ph_key>[\w_-]+)/(?P<cell_type>\w+)/(?P<variant>[\w-]+)/$',
         views.page_add_cell,

combo/manager/views.py

@@ -632,6 +632,17 @@ class SnapshotRestoreView(ManagedPageMixin, DetailView):
 snapshot_restore = SnapshotRestoreView.as_view()
 
 
+def snapshot_export(request, *args, **kwargs):
+    snapshot = PageSnapshot.objects.get(id=kwargs['pk'])
+    page = snapshot.get_page()
+    response = HttpResponse(content_type='application/json')
+    response['Content-Disposition'] = 'attachment; filename="export_page_{}_{}.json"'.format(
+        snapshot.get_page().slug, snapshot.timestamp.strftime('%Y%m%d')
+    )
+    json.dump(page.get_serialized_page(), response, indent=2)
+    return response
+
+
 class PageRedirectToEditView(RedirectView):
     permanent = False
 

tests/test_manager.py

@@ -904,6 +904,38 @@ def test_export_page(freezer, app, admin_user):
     assert resp.json['pages'][0].get('fields').get('slug') == 'one'
 
 
+def test_export_page_snapshot(freezer, app, admin_user):
+    Page.objects.all().delete()
+    page = Page(title='One', slug='one', template_name='standard')
+    page.save()
+    app = login(app)
+
+    freezer.move_to('2020-07-16')
+    resp = app.get('/manage/pages/%s/' % page.id, status=200)
+    resp = resp.click(href='.*/title')
+    resp.form['title'].value = 'Initial Title'
+    resp = resp.form.submit()
+    resp = resp.follow()
+
+    freezer.move_to('2020-07-17')
+    resp = resp.click(href='.*/title')
+    resp.form['title'].value = 'Updated Title'
+    resp = resp.form.submit()
+
+    history = app.get('/manage/pages/%s/history' % page.id, status=200)
+    resp = history.click('export', index=0, verbose=True)
+
+    assert resp.headers['content-type'] == 'application/json'
+    assert resp.headers['content-disposition'] == 'attachment; filename="export_page_one_20200717.json"'
+    assert resp.json['fields']['title'] == 'Updated Title'
+
+    resp = history.click('export', index=1, verbose=True)
+
+    assert resp.headers['content-type'] == 'application/json'
+    assert resp.headers['content-disposition'] == 'attachment; filename="export_page_one_20200716.json"'
+    assert resp.json['fields']['title'] == 'Initial Title'
+
+
 def test_export_page_without_child(freezer, app, admin_user):
     page = Page.objects.create(title='One', slug='one', template_name='standard')
     Page.objects.create(title='Two', slug='two', parent=page, template_name='standard')