add rental calendar

fet2020/rental/urls.py

@@ -1,11 +1,12 @@
 from django.urls import path
 
-from . import apps
+from . import apps, views
 from .views import RentalCreateDoneView, RentalCreateView, RentalItemDetailView, RentalListView
 
 app_name = apps.RentalConfig.name
 
 urlpatterns = [
+    path("rental_calendar.ics", views.rental_calendar, name="calendar"),
     path("rental/", RentalListView.as_view(), name="index"),
     path("request-rental/", RentalCreateView.as_view(), name="rental_create"),
     path(

fet2020/rental/views.py

@@ -2,6 +2,7 @@ import calendar
 import datetime
 
 from django.db.models import Q
+from django.shortcuts import render
 from django.urls import reverse
 from django.views.generic import ListView, TemplateView
 from django.views.generic.detail import DetailView
@@ -170,3 +171,21 @@ class RentalCreateDoneView(TemplateView):
 class RentalItemDetailView(DetailView):
     model = RentalItem
     template_name = "rental/rentalitem_detail.html"
+
+
+def rental_calendar(request):
+    """
+    ICS-calendar for outlook, google calender, ...
+    """
+    rentals = Rental.objects.all()
+
+    context = {
+        "rentals": rentals,
+    }
+
+    response = render(request, "rental/rental_calendar.ics", context, content_type="text/calendar")
+
+    # End of line (EOL) must be CRLF, to be compliant with RFC5545. Django/Python set the EOL to LF.
+    response.content = response.content.replace(b"\n", b"\r\n")
+
+    return response