[#1664] Add group activity stream page

You can now see a group's activity stream at /group/activity/GROUP_NAME.

This page is not integrated into the rest of the group pages yet like
the user activity stream page is with the user pages, but can be in
future if we want.

Also remove c.group_activity_stream from the group read context as it's
not used so no need to compute it.

ckan/config/routing.py

@@ -237,7 +237,8 @@ def make_map():
           'edit',
           'authz',
           'delete',
-          'history'
+          'history',
+          'activity',
           ]))
           )
         m.connect('group_read', '/group/{id}', action='read')

ckan/controllers/group.py

@@ -233,12 +233,6 @@ def pager_url(q=None, page=None):
             c.facets = {}
             c.page = h.Page(collection=[])
 
-        # Add the group's activity stream (already rendered to HTML) to the
-        # template context for the group/read.html template to retrieve later.
-        c.group_activity_stream = \
-            get_action('group_activity_list_html')(context,
-                                                   {'id': c.group_dict['id']})
-
         return render(self._read_template(c.group_dict['type']))
 
     def new(self, data=None, errors=None, error_summary=None):
@@ -498,6 +492,28 @@ def history(self, id):
             return feed.writeString('utf-8')
         return render(self._history_template(c.group_dict['type']))
 
+    def activity(self, id):
+        '''Render this group's public activity stream page.'''
+
+        context = {'model': model, 'session': model.Session,
+                   'user': c.user or c.author, 'for_view': True}
+        data_dict = {'id': id}
+
+        try:
+            c.group_dict = get_action('group_show')(context, data_dict)
+            c.group = context['group']
+        except NotFound:
+            abort(404, _('Group not found'))
+        except NotAuthorized:
+            abort(401, _('Unauthorized to read group %s') % id)
+
+        # Add the group's activity stream (already rendered to HTML) to the
+        # template context for the group/read.html template to retrieve later.
+        c.group_activity_stream = get_action('group_activity_list_html')(
+                context, {'id': c.group_dict['id']})
+
+        return render('group/activity_stream.html')
+
     def _render_edit_form(self, fs):
         # errors arrive in c.error and fs.errors
         c.fieldset = fs

ckan/templates/group/activity_stream.html

@@ -0,0 +1,6 @@
+{% extends "page.html" %}
+
+{% block primary_content %}
+  <h2 class="hide-heading">{{ _('Activity Stream') }}</h2>
+  {{ c.group_activity_stream | safe }}
+{% endblock %}