gramps/src/gen/lib/privacybase.py

#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2000-2005  Donald N. Allingham
# Copyright (C) 2010       Michiel D. Nauta
#
# 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
#

# $Id$

"""
PrivacyBase Object class for GRAMPS.
"""

#-------------------------------------------------------------------------
#
# PrivacyBase Object
#
#-------------------------------------------------------------------------
class PrivacyBase(object):
    """
    Base class for privacy-aware objects.
    """

    def __init__(self, source=None):
        """
        Initialize a PrivacyBase. 
        
        If the source is not None, then object is initialized from values of 
        the source object.

        :param source: Object used to initialize the new object
        :type source: PrivacyBase
        """
        
        if source:
            self.private = source.private
        else:
            self.private = False

    def serialize(self):
        """
        Convert the object to a serialized tuple of data.
        """
        return self.private

    def unserialize(self, data):
        """
        Convert a serialized tuple of data to an object.
        """
        self.private = data
        return self

    def set_privacy(self, val):
        """
        Set or clears the privacy flag of the data.

        :param val: value to assign to the privacy flag. True indicates that 
            the record is private, False indicates that it is public.
        :type val: bool
        """
        self.private = val

    def get_privacy(self):
        """
        Return the privacy level of the data. 

        :returns: True indicates that the record is private
        :rtype: bool
        """
        return self.private

    def _merge_privacy(self, other):
        """
        Merge the privacy level of this object with that of other.

        :returns: Privacy of merged objects.
        :rtype: bool
        """
        self.private = self.private or other.private