#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2006-2007  Donald N. Allingham
#
# 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
#

# $Id$

"""
Person Reference class for GRAMPS.
"""

__revision__ = "$Revision$"

#-------------------------------------------------------------------------
#
# GRAMPS modules
#
#-------------------------------------------------------------------------
from secondaryobj import SecondaryObject
from privacybase import PrivacyBase
from srcbase import SourceBase
from notebase import NoteBase
from refbase import RefBase

#-------------------------------------------------------------------------
#
# Person References for Person/Family
#
#-------------------------------------------------------------------------
class PersonRef(SecondaryObject, PrivacyBase, SourceBase, NoteBase, RefBase):
    """
    Person reference class.

    This class is for keeping information about how the person relates
    to another person from the database, if not through family.
    Examples would be: godparent, friend, etc.
    """

    def __init__(self, source=None):
        PrivacyBase.__init__(self, source)
        SourceBase.__init__(self, source)
        NoteBase.__init__(self, source)
        RefBase.__init__(self, source)
        if source:
            self.rel = source.rel
        else:
            self.rel = ''

    def serialize(self):
        """
        Converts the object to a serialized tuple of data
        """
        return (PrivacyBase.serialize(self),
                SourceBase.serialize(self),
                NoteBase.serialize(self),
                RefBase.serialize(self),
                self.rel)

    def unserialize(self, data):
        """
        Converts a serialized tuple of data to an object
        """
        (privacy, source_list, note_list, ref, self.rel) = data
        PrivacyBase.unserialize(self, privacy)
        SourceBase.unserialize(self, source_list)
        NoteBase.unserialize(self, note_list)
        RefBase.unserialize(self, ref)
        return self

    def get_text_data_list(self):
        """
        Returns the list of all textual attributes of the object.

        @return: Returns the list of all textual attributes of the object.
        @rtype: list
        """
        return [self.rel]

    def get_text_data_child_list(self):
        """
        Returns the list of child objects that may carry textual data.

        @return: Returns the list of child objects that may carry textual data.
        @rtype: list
        """
        return self.source_list

    def get_referenced_handles(self):
        """
        Returns the list of (classname,handle) tuples for all directly
        referenced primary objects.
        
        @return: List of (classname,handle) tuples for referenced objects.
        @rtype: list
        """
        ret = self.get_referenced_note_handles()
        if self.ref:
            ret += [('Person', self.ref)]
        return ret

    def get_handle_referents(self):
        """
        Returns the list of child objects which may, directly or through
        their children, reference primary objects..
        
        @return: Returns the list of objects refereincing primary objects.
        @rtype: list
        """
        return self.source_list

    def set_relation(self, rel):
        """Sets relation to a person"""
        self.rel = rel

    def get_relation(self):
        """Returns the relation to a person"""
        return self.rel