#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2013    Nick Hall
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

# $Id$

#-------------------------------------------------------------------------
#
# Standard Python modules
#
#-------------------------------------------------------------------------

#-------------------------------------------------------------------------
#
# GRAMPS modules
#
#-------------------------------------------------------------------------
from .. import Rule
from gramps.gen.const import GRAMPS_LOCALE as glocale
_ = glocale.translation.gettext
from ....lib.childreftype import ChildRefType

#-------------------------------------------------------------------------
#
# HasTwins
#
#-------------------------------------------------------------------------
class HasTwins(Rule):
    """Rule that checks for a family with twins"""

    name        = _('Families with twins')
    description = _("Matches families with twins")
    category    = _('Child filters')

    def apply(self, db, family):
        date_list = []
        for childref in family.get_child_ref_list():
            if int(childref.get_mother_relation()) == ChildRefType.BIRTH:
                child = db.get_person_from_handle(childref.ref)
                birthref = child.get_birth_ref()
                if birthref:
                    birth = db.get_event_from_handle(birthref.ref)
                    sortval = birth.get_date_object().get_sort_value()
                    if sortval != 0:
                        if sortval in date_list:
                            return True
                        else:
                            date_list.append(sortval)
        return False
