src/agenda_culturel/models.py

@@ -26,6 +26,8 @@ from django.utils import timezone
 from location_field.models.plain import PlainLocationField
 
 from .calendar import CalendarList, CalendarDay
+from icalendar import Calendar as icalCal
+from icalendar import Event as icalEvent
 
 import logging
 
@@ -1090,6 +1092,46 @@ class Event(models.Model):
 
         return (dtstart <= e_dtstart <= dtend) or (e_dtstart <= dtstart <= e_dtend)
 
+    def export_to_ics(events):
+        cal = icalCal()
+        # Some properties are required to be compliant
+        cal.add("prodid", "-//My calendar product//example.com//")
+        cal.add("version", "2.0")
+
+        for event in events:
+            eventIcal = icalEvent()
+            # mapping
+            eventIcal.add(
+                "dtstart",
+                datetime(
+                    event.start_day.year,
+                    event.start_day.month,
+                    event.start_day.day,
+                    event.start_time.hour,
+                    event.start_time.minute,
+                ),
+            )
+            eventIcal.add(
+                "dtend",
+                datetime(
+                    event.end_day.year,
+                    event.end_day.month,
+                    event.end_day.day,
+                    event.end_time.hour,
+                    event.end_time.minute,
+                ),
+            )
+            eventIcal.add("summary", event.title)
+            eventIcal.add("name", event.title)
+            eventIcal.add(
+                "description", event.description + "\r" + event.reference_urls[0]
+            )
+            eventIcal.add("location", event.exact_location or event.location)
+
+            cal.add_component(eventIcal)
+
+        return cal
+
 
 class ContactMessage(models.Model):
     class Meta:

src/agenda_culturel/templates/agenda_culturel/single-event/event-single-inc.html

@@ -70,11 +70,12 @@
             {% endif %}
             </p>
         </div>
-        {% if perms.agenda_culturel.change_event and not noedit %}
         <div class="buttons">
+            <a href="{% url 'export_event_ical' event.start_day.year event.start_day.month event.start_day.day event.id %}" role="button">Exporter ical {% picto_from_name "calendar" %}</a>
+            {% if perms.agenda_culturel.change_event and not noedit %}
                 {% include "agenda_culturel/edit-buttons-inc.html" with event=event %}
-        </div>
             {% endif %}
+        </div>
         </footer>
 </article>
 

src/agenda_culturel/urls.py

@@ -158,6 +158,10 @@ urlpatterns = [
         UnknownPlaceAddView.as_view(),
         name="add_place_to_event",
     ),
+    path(
+        "event/<int:year>/<int:month>/<int:day>/<int:pk>/ical",
+        export_event_ical,
+        name="export_event_ical"),
 ]
 
 if settings.DEBUG:

src/agenda_culturel/views.py

@@ -10,7 +10,7 @@ from django.http import QueryDict
 from django import forms
 from django.contrib.postgres.search import SearchQuery, SearchHeadline
 
-from django.http import HttpResponseRedirect
+from django.http import HttpResponseRedirect, HttpResponse
 from django.urls import reverse
 from collections import Counter
 
@@ -598,6 +598,24 @@ def import_from_url(request):
         )
 
 
+def export_event_ical(request, year, month, day, pk):
+    event = get_object_or_404(Event, pk=pk)
+    event = event.get_recurrence_at_date(year, month, day)
+
+    events = list()
+    events.append(event)
+
+    cal = Event.export_to_ics(events)
+
+    response = HttpResponse(content_type="text/calendar")
+    response.content = cal.to_ical().decode("utf-8").replace("\r\n", "\n")
+    response["Content-Disposition"] = "attachment; filename={0}{1}".format(
+        event.title, ".ics"
+    )
+
+    return response
+
+
 class EventFilterAdmin(django_filters.FilterSet):
     status = django_filters.MultipleChoiceFilter(
         choices=Event.STATUS.choices, widget=forms.CheckboxSelectMultiple