From 70c61b00484ecfb4db038d8746c0e5228873fad3 Mon Sep 17 00:00:00 2001
From: Janus Troelsen <ysangkok@gmail.com>
Date: Tue, 30 Aug 2016 13:21:44 +0200
Subject: [PATCH] add iCal event calendar

---
 bornhack/urls.py      |  2 ++
 program/views.py      | 28 ++++++++++++++++++++++++++++
 requirements/base.txt |  3 ++-
 3 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/bornhack/urls.py b/bornhack/urls.py
index be35409a..899dd966 100644
--- a/bornhack/urls.py
+++ b/bornhack/urls.py
@@ -10,6 +10,7 @@ from django.conf.urls import include, url
 from django.contrib import admin
 from django.views.generic import TemplateView, RedirectView
 from django.core.urlresolvers import reverse_lazy
+from program.views import ICSView
 
 urlpatterns = [
     url(
@@ -84,4 +85,5 @@ urlpatterns = [
     ),
     url(r'^accounts/', include('allauth.urls')),
     url(r'^admin/', include(admin.site.urls)),
+    url(r'^calendar/', ICSView.as_view()),
 ]
diff --git a/program/views.py b/program/views.py
index 01d71dc7..104fb8d8 100644
--- a/program/views.py
+++ b/program/views.py
@@ -2,10 +2,38 @@ from collections import OrderedDict
 
 import datetime
 from django.views.generic import ListView, TemplateView, DetailView
+from django.views import View
+from django.http.response import HttpResponse
 
 from camps.models import Day
 from . import models
 
+import icalendar
+from icalendar import vDatetime
+
+def gen_icalevents(event):
+    for i in event.days.all():
+        ievent = icalendar.Event()
+        ievent['summary'] = event.title
+
+        newdate = datetime.datetime.combine(i.date, datetime.time(event.start.hour, event.start.minute, event.start.second))
+        ievent['dtstart'] = vDatetime(newdate).to_ical()
+
+        newdate = datetime.datetime.combine(i.date, datetime.time(event.end.hour, event.end.minute, event.end.second))
+        ievent['dtend'] = vDatetime(newdate).to_ical()
+
+        yield ievent
+
+def gen_ics(events):
+    cal = icalendar.Calendar()
+    for event in events:
+        for ical_event in gen_icalevents(event):
+            cal.add_component(ical_event)
+    return cal.to_ical()
+
+class ICSView(View):
+    def get(self, request, *args, **kwargs):
+        return HttpResponse(gen_ics(models.Event.objects.all()))
 
 class SpeakerDetailView(DetailView):
     model = models.Speaker
diff --git a/requirements/base.txt b/requirements/base.txt
index 6efaf098..9c15ff5e 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -9,4 +9,5 @@ Pillow==3.2.0
 qrcode==5.3
 CommonMark==0.6.4
 django-bleach==0.3.0
-Unidecode==0.4.19
\ No newline at end of file
+Unidecode==0.4.19
+icalendar==3.10