Code layout change.

[wolnelektury.git] / src / pdcounter / templatetags / time_tags.py

diff --git a/src/pdcounter/templatetags/time_tags.py b/src/pdcounter/templatetags/time_tags.py
new file mode 100755 (executable)
index 0000000..7ea5c60
--- /dev/null
+++ b/src/pdcounter/templatetags/time_tags.py
@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
+import datetime
+import pytz
+from django.conf import settings
+from django import template
+from django.utils import timezone
+
+
+register = template.Library()
+
+@register.filter
+def date_to_utc(date, day_end=False):
+    """ Converts a datetime.date to UTC datetime.
+
+    The datetime represents the start (or end) of the given day in
+    the server's timezone.
+    """
+    if day_end:
+        date += datetime.timedelta(1)
+    localtime = datetime.datetime.combine(date, datetime.time(0, 0))
+    return timezone.utc.normalize(
+        pytz.timezone(settings.TIME_ZONE).localize(localtime)
+    )
+
+
+@register.filter
+def utc_for_js(dt):
+    return dt.strftime('%Y/%m/%d %H:%M:%S UTC')