# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr

#

# This file is part of CubicWeb.

#

# CubicWeb is free software: you can redistribute it and/or modify it under the

# terms of the GNU Lesser General Public License as published by the Free

# Software Foundation, either version 2.1 of the License, or (at your option)

# any later version.

#

# CubicWeb 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 Lesser General Public License for more

# details.

#

# You should have received a copy of the GNU Lesser General Public License along

# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.

"""bookmark related hooks"""

__docformat__ = "restructuredtext en"

from cubicweb.server import hook

class AutoDeleteBookmarkOp(hook.Operation):

    bookmark = None # make pylint happy

    def precommit_event(self):

        if not self.cnx.deleted_in_transaction(self.bookmark.eid):

            if not self.bookmark.bookmarked_by:

                self.bookmark.cw_delete()

class DelBookmarkedByHook(hook.Hook):

    """ensure user logins are stripped"""

    __regid__ = 'autodelbookmark'

    __select__ = hook.Hook.__select__ & hook.match_rtype('bookmarked_by',)

    category = 'bookmark'

    events = ('after_delete_relation',)

    def __call__(self):

        AutoDeleteBookmarkOp(self._cw,

                             bookmark=self._cw.entity_from_eid(self.eidfrom))