"""various library content hooks

:organization: Logilab

:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

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

"""

__docformat__ = "restructuredtext en"

from cubicweb.server.hooksmanager import Hook

from cubicweb.server.pool import PreCommitOperation

class AddUpdateEUserHook(Hook):

    """ensure user logins are stripped"""

    events = ('before_add_entity', 'before_update_entity',)

    accepts = ('EUser',)

    def call(self, session, entity):

        if 'login' in entity and entity['login']:

            entity['login'] = entity['login'].strip()

class AutoDeleteBookmark(PreCommitOperation):

    def precommit_event(self):

        session = self.session

        if not self.beid in session.query_data('pendingeids', ()):

            if not session.unsafe_execute('Any X WHERE X bookmarked_by U, X eid %(x)s',

                                          {'x': self.beid}, 'x'):

                session.unsafe_execute('DELETE Bookmark X WHERE X eid %(x)s',

                                       {'x': self.beid}, 'x')

class DelBookmarkedByHook(Hook):

    """ensure user logins are stripped"""

    events = ('after_delete_relation',)

    accepts = ('bookmarked_by',)

    def call(self, session, subj, rtype, obj):

        AutoDeleteBookmark(session, beid=subj)