hack: DateTime.latestTime patch for 2013/03/31

product/ERP5Type/patches/DateTimePatch.py

@@ -248,6 +248,26 @@ def DateTime_parse(self, st, datefmt=getDefaultDateFormat()):
 
 DateTimeKlass._parse = DateTime_parse
 
+def DateTime_latestTime(self):
+    """Return a new DateTime object that represents the latest
+    possible time (in whole seconds) that still falls within
+    the current object\'s day, in the object\'s timezone context.
+
+    Patched to return a date in the "natural time zone" when called on the day
+    of DST change.
+    An example problematic day is 2013/03/31, where DST switched at 2h00
+    2013/03/31 00:00:00 is GMT+1 but 2013/03/31 23:59:59 is GMT+2
+    The default behaviour of this method would be to return 2013/03/31 23:59:59
+    still in GMT+1, which is 22h59 local time.
+    """
+    if self._hour == self._minute == self._second == 0:
+      return self.__class__(self._year,self._month,self._day,
+                            23,59,59)
+    return self.__class__(self._year,self._month,self._day,
+                          23,59,59,self._tz)
+
+DateTimeKlass.latestTime = DateTime_latestTime
+
 if __name__ == '__main__':
   for i in ('2007/01/02 12:34:56.789',
             '2007/01/02 12:34:56.789 GMT+0200',