WIP: [DAV] Implement timezone conversion

aleksis/core/util/core_helpers.py

@@ -24,7 +24,7 @@ from django.utils.module_loading import import_string
 import django_ical.feedgenerator as feedgenerator
 import recurring_ical_events
 from cache_memoize import cache_memoize
-from icalendar import Calendar, Component, Event, Todo
+from icalendar import Calendar, Component, Event, Timezone, Todo
 
 if TYPE_CHECKING:
     from django.contrib.contenttypes.models import ContentType
@@ -561,6 +561,11 @@ class ExtendedICal20Feed(feedgenerator.ICal20Feed):
         with_reference_object: bool = False,
         params: dict[str, any] = None,
     ):
+        if params is not None and "timezone" in params:
+            tz = Timezone.from_ical(params["timezone"])
+        else:
+            tz = None
+
         for item in self.items:
             component_type = item.get("component_type")
             element = Todo() if component_type == "todo" else Event()
@@ -583,6 +588,18 @@ class ExtendedICal20Feed(feedgenerator.ICal20Feed):
                     elif ifield == "reference_object":
                         if with_reference_object:
                             element.add(efield, val, encode=False)
+                    elif (
+                        ifield == "start_datetime"
+                        or ifield == "end_datetime"
+                        or ifield == "timestamp"
+                        or ifield == "created"
+                        or ifield == "updateddate"
+                        or ifield == "rdate"
+                        or ifield == "exdate"
+                    ):
+                        if tz is not None:
+                            val = val.astimezone(tz.to_tz())
+                        element.add(efield, val)
                     else:
                         element.add(efield, val)
             calendar.add_component(element)

aleksis/core/util/dav_handler/calendar.py

@@ -7,7 +7,7 @@ from django.urls import reverse
 
 from ..core_helpers import EXTENDED_ITEM_ELEMENT_FIELD_MAP
 from .base import ElementHandler, QueryBase
-from .generic import DAVHref
+from .generic import DAVHref, DAVProp
 
 
 class TimeRangeFilter(ElementHandler):
@@ -202,7 +202,23 @@ class SupportedCollationSet(ElementHandler):
             supported_collation.text = collation
 
 
-class CalendarQuery(QueryBase, ElementHandler):
+class Timezone(ElementHandler):
+    name = "{urn:ietf:params:xml:ns:caldav}timezone"
+    invisible = True
+
+
+class ReportBase(QueryBase):
+    def post_handle(self):
+        super().post_handle()
+
+        if Timezone.name in self.children:
+            timezone = self.children.get(Timezone.name)
+            prop = self.children.get(DAVProp.name)
+            calendar_data = prop.children.get(CalendarData.name)
+            calendar_data.params["timezone"] = timezone.content
+
+
+class CalendarQuery(ReportBase, ElementHandler):
     name = "{urn:ietf:params:xml:ns:caldav}calendar-query"
 
     def pre_handle(self):