misc: add a rss/atom feed cell (#6842)

combo/data/models.py

@@ -14,11 +14,15 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import feedparser
+import hashlib
 import json
+import requests
 
 from django.conf import settings
 from django.contrib.auth.models import Group
 from django.contrib.contenttypes.models import ContentType
+from django.core.cache import cache
 from django.core.exceptions import ObjectDoesNotExist
 from django.core import serializers
 from django.db import models
@@ -34,6 +38,7 @@ import cmsplugin_blurp.utils
 from .library import register_cell_class, get_cell_classes, get_cell_class
 
 from combo import utils
+from combo.utils import NothingInCacheException
 
 
 def element_is_visible(element, user=None):
@@ -469,3 +474,27 @@ class LinkCell(CellBase):
         if self.anchor:
             context['url'] += '#' + self.anchor
         return super(LinkCell, self).render(context)
+
+
+@register_cell_class
+class FeedCell(CellBase):
+    url = models.URLField(_('URL'), blank=True)
+
+    template_name = 'combo/feed-cell.html'
+
+    class Meta:
+        verbose_name = _('RSS/Atom Feed')
+
+    def render(self, context):
+        cache_key = hashlib.md5(self.url).hexdigest()
+        feed_content = cache.get(cache_key)
+        if not context.get('ajax') and feed_content is None:
+            raise NothingInCacheException()
+        if not feed_content:
+            feed_response = requests.get(self.url)
+            if feed_response.status_code == 200:
+                feed_content = feed_response.content
+                cache.set(cache_key, feed_content, 600)
+        if feed_content:
+            context['feed'] = feedparser.parse(feed_content)
+        return super(FeedCell, self).render(context)

combo/public/templates/combo/feed-cell.html

@@ -0,0 +1,9 @@
+{% load i18n %}
+{% for entry in feed.entries %}
+{% if entry.link %}
+  <h3><a href="{{entry.link}}">{{entry.title}}</a></h3>
+  {% else %}
+  <h3>{{entry.title}}</h3>
+{% endif %}
+{% if entry.description %}<p>{{entry.description}}</p>{% endif %}
+{% endfor %}

debian/control

@@ -12,6 +12,7 @@ Depends: ${misc:Depends}, ${python:Depends},
     python-django (>= 1.7),
     python-gadjo,
     python-requests,
+    python-feedparser,
     python-django-cmsplugin-blurp
 Recommends: python-django-mellon
 Description: Portal Management System (Python module)

requirements.txt

@@ -4,3 +4,4 @@ django-ckeditor
 django-cmsplugin-blurp
 django-jsonfield
 requests
+feedparser

setup.py

@@ -106,6 +106,7 @@ setup(
         'django-ckeditor',
         'gadjo',
         'django-cmsplugin-blurp',
+        'feedparser'
         'django-jsonfield',
         ],
     zip_safe=False,