#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2008  Brian G. Matherly
# Copyright (C) 2008  Jerome Rapinat
# Copyright (C) 2008  Benny Malengier
#
# 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
#
# Filters/Rules/Person/_HasAssociation.py
# $Id$
#

#-------------------------------------------------------------------------
#
# Standard Python modules
#
#-------------------------------------------------------------------------
from gen.ggettext import gettext as _

#-------------------------------------------------------------------------
#
# GRAMPS modules
#
#-------------------------------------------------------------------------

from Filters.Rules import Rule

#-------------------------------------------------------------------------
#
# HasAssociation
#
#-------------------------------------------------------------------------
class HasAssociation(Rule):
    """Rule that checks for a person with a personal association"""

    labels      = [  _('Number of instances:'), _('Number must be:')]
    name        = _('People with <count> associations')
    description = _("Matches people with a certain number of associations")
    category    = _('General filters')
    
    def prepare(self, db):
        # things we want to do just once, not for every handle
        if  self.list[1] == 'lesser than':
            self.count_type = 0
        elif self.list[1] == 'greater than':
            self.count_type = 2
        else:
            self.count_type = 1 # "equal to"

        self.selected_count = int(self.list[0])
        
    def apply(self, db, person):
        count = len(person.get_person_ref_list())
        if self.count_type == 0:     # "lesser than"
            return count < self.selected_count
        elif self.count_type == 2:   # "greater than"
            return count > self.selected_count
        # "equal to"
        return count == self.selected_count
