From a37d620afb1349e1a801e2a39285c9c479bd0330 Mon Sep 17 00:00:00 2001
From: Scott Bragg <jsbragg@scriptforge.org>
Date: Thu, 22 Dec 2016 12:00:23 +1100
Subject: [PATCH] Adds an ical feed

---
 requirements/base.txt       |  1 +
 symposion/schedule/urls.py  |  2 ++
 symposion/schedule/views.py | 43 +++++++++++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+)

diff --git a/requirements/base.txt b/requirements/base.txt
index d2fe5479..ad552399 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -10,3 +10,4 @@ easy-thumbnails==2.3
 html5lib==0.9999999
 markdown==2.6.5
 pytz==2015.7
+django-ical==1.4
diff --git a/symposion/schedule/urls.py b/symposion/schedule/urls.py
index 28b05f1f..7dc6befb 100644
--- a/symposion/schedule/urls.py
+++ b/symposion/schedule/urls.py
@@ -13,6 +13,7 @@ from .views import (
     session_staff_email,
     session_list,
     session_detail,
+    EventFeed
 )
 
 urlpatterns = [
@@ -27,6 +28,7 @@ urlpatterns = [
     url(r"^([\w\-]+)/presentations.csv$", schedule_list_csv, name="schedule_list_csv"),
     url(r"^([\w\-]+)/edit/slot/(\d+)/", schedule_slot_edit, name="schedule_slot_edit"),
     url(r"^conference.json", schedule_json, name="schedule_json"),
+    url(r"^conference.ics", EventFeed(), name="ical_feed"),
     url(r"^sessions/staff.txt$", session_staff_email, name="schedule_session_staff_email"),
     url(r"^sessions/$", session_list, name="schedule_session_list"),
     url(r"^session/(\d+)/$", session_detail, name="schedule_session_detail"),
diff --git a/symposion/schedule/views.py b/symposion/schedule/views.py
index 2cc7fa8a..a3881145 100644
--- a/symposion/schedule/views.py
+++ b/symposion/schedule/views.py
@@ -10,6 +10,8 @@ from django.contrib.auth.models import User
 from django.contrib import messages
 from django.contrib.sites.models import Site
 
+from django_ical.views import ICalFeed
+
 from account.decorators import login_required
 
 from symposion.schedule.forms import SlotEditForm, ScheduleSectionForm
@@ -256,6 +258,47 @@ def schedule_json(request):
         content_type="application/json"
     )
 
+class EventFeed(ICalFeed):
+
+    product_id = '-//linux.conf.au/schedule//EN'
+    timezone = 'Australia/Tasmania'
+    filename = 'conference.ics'
+    
+    def items(self):
+        return Slot.objects.filter(
+            day__schedule__published=True,
+            day__schedule__hidden=False
+        ).order_by("start")    
+    
+    def item_title(self, item):
+        if hasattr(item.content, 'proposal'):
+            return item.content.title
+        else:
+            item.content_override if item.content_override else "Slot"
+    
+    def item_description(self, item):
+        if hasattr(item.content, 'proposal'):
+            return item.content.abstract
+        else:
+            return None
+    
+    def item_start_datetime(self, item):
+        return item.start_datetime
+    
+    def item_end_datetime(self, item):
+        return item.end_datetime
+    
+    def item_location(self, item):
+        return ", ".join(room["name"] for room in item.rooms.values())
+    
+    def item_link(self, item):
+        if hasattr(item.content, 'proposal'):
+            return 'http://%s%s' % (
+                                    Site.objects.get_current().domain,
+                                    reverse('schedule_presentation_detail', args=[item.content.pk])
+                                    )
+        else:
+            return 'http://%s' % Site.objects.get_current().domain
 
 def session_list(request):
     sessions = Session.objects.all().order_by('pk')