Implement duolingual iCal feed

Todo: make old link redirect to the dutch ical feed

requirements.txt

@@ -9,3 +9,4 @@ django-tinymce==2.3.0
 pytz
 rcssmin
 djangorestframework==3.4.4
+django-ical==1.4

website/events/feeds.py

+from django.urls import reverse
+from django.utils.translation import activate
+from django_ical.views import ICalFeed
+from events.models import Event
+from django.utils.translation import ugettext as _
+
+
+class EventFeed(ICalFeed):
+    def __init__(self, lang='en'):
+        super().__init__()
+        self.lang = lang
+
+    def product_id(self):
+        return '-//thalia.nu//EventCalendar//' + self.lang.upper()
+
+    def file_name(self):
+        return "thalia_{}.ics".format(self.lang)
+
+    def title(self):
+        activate(self.lang)
+        return _('Study Association Thalia event calendar')
+
+    def items(self):
+        return Event.objects.filter(published=True).order_by('-start')
+
+    def item_title(self, item):
+        return item.title
+
+    def item_description(self, item):
+        return item.description
+
+    def item_start_datetime(self, item):
+        return item.start
+
+    def item_end_datetime(self, item):
+        return item.end
+
+    def item_link(self, item):
+        return reverse('events:event', kwargs={'event_id': item.id})
+
+    def item_location(self, item):
+        return "{} - {}".format(item.location, item.map_location)

website/events/locale/nl/LC_MESSAGES/django.po

@@ -7,8 +7,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-09-16 08:49+0200\n"
-"PO-Revision-Date: 2016-09-16 12:52+0200\n"
+"POT-Creation-Date: 2016-09-20 21:26+0200\n"
+"PO-Revision-Date: 2016-09-20 21:27+0200\n"
 "Last-Translator: \n"
 "Language-Team: \n"
 "Language: nl\n"
@@ -38,6 +38,10 @@ msgstr "Publiceer geselecteerde evenementen"
 msgid "Unpublish selected events"
 msgstr "Publicatie van geselecteerde evenementen ongedaan maken"
 
+#: feeds.py:23
+msgid "Study Association Thalia event calendar"
+msgstr "Studievereniginig Thalia evenementenkalender"
+
 #: models.py:13
 msgid "No registration required"
 msgstr "Geen registratie vereist"

website/events/templates/events/index.html

@@ -13,7 +13,12 @@
         {% trans "Calendar" %}
         <span class="title-meta clearfix">
             <span>
-                <a href="{% url '#' %}" id="collectionButton" target="_blank" class="calendar">
+                <a href="{% url 'events:ical-'|add:LANGUAGE_CODE %}"
+                   id="collectionButton"
+                   target="_blank"
+                   class="calendar"
+                   title="iCal feed"
+                >
                     <i class="fa fa-calendar"></i>
                 </a>
             </span>

website/events/urls.py

@@ -4,6 +4,7 @@ Events URL Configuration
 
 from django.conf.urls import url
 
+from events.feeds import EventFeed
 from . import views
 
 urlpatterns = [
@@ -11,4 +12,6 @@ urlpatterns = [
     url(r'admin/(?P<event_id>\d+)/export/$', views.export, name='export'),
     url(r'^(?P<event_id>\d+)$', views.event, name='event'),
     url(r'^$', views.index, name='index'),
+    url(r'^ical/nl.ics', EventFeed(lang='nl'), name='ical-nl'),
+    url(r'^ical/en.ics', EventFeed(), name='ical-en'),
 ]