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−# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+
−# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+
−#
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−# 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
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−# 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/>.
+
−"""Core hooks: set generic metadata
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−
+
−"""
+
−__docformat__ = "restructuredtext en"
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−
+
−
+
−from datetime import datetime
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−
+
−from cubicweb.selectors import implements
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−from cubicweb.server import hook
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−from cubicweb.server.utils import eschema_eid
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−
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−
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−class MetaDataHook(hook.Hook):
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−    __abstract__ = True
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−    category = 'metadata'
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−
+
−
+
−class InitMetaAttrsHook(MetaDataHook):
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−    """before create a new entity -> set creation and modification date
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−
+
−    this is a conveniency hook, you shouldn't have to disable it
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−    """
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−    __regid__ = 'metaattrsinit'
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−    events = ('before_add_entity',)
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−
+
−    def __call__(self):
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−        timestamp = datetime.now()
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−        self.entity.setdefault('creation_date', timestamp)
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−        self.entity.setdefault('modification_date', timestamp)
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−        if not self._cw.get_shared_data('do-not-insert-cwuri'):
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−            cwuri = u'%seid/%s' % (self._cw.base_url(), self.entity.eid)
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−            self.entity.setdefault('cwuri', cwuri)
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−
+
−
+
−class UpdateMetaAttrsHook(MetaDataHook):
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−    """update an entity -> set modification date"""
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−    __regid__ = 'metaattrsupdate'
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−    events = ('before_update_entity',)
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−
+
−    def __call__(self):
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−        # repairing is true during c-c upgrade/shell and similar commands. We
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−        # usually don't want to update modification date in such cases.
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−        #
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−        # XXX to be really clean, we should turn off modification_date update
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−        # explicitly on each command where we do not want that behaviour.
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−        if not self._cw.vreg.config.repairing:
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−            self.entity.setdefault('modification_date', datetime.now())
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−
+
−
+
−class _SetCreatorOp(hook.Operation):
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−
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−    def precommit_event(self):
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−        session = self.session
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−        for eid in session.transaction_data.pop('set_creator_op'):
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−            if session.deleted_in_transaction(eid):
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−                # entity have been created and deleted in the same transaction
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−                continue
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−            entity = session.entity_from_eid(eid)
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−            if not entity.created_by:
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−                session.add_relation(eid, 'created_by', session.user.eid)
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−
+
−
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−class SetIsHook(MetaDataHook):
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−    """create a new entity -> set is and is_instance_of relations
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−
+
−    those relations are inserted using sql so they are not hookable.
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−    """
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−    __regid__ = 'setis'
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−    events = ('after_add_entity',)
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−
+
−    def __call__(self):
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−        if hasattr(self.entity, '_cw_recreating'):
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−            return
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−        session = self._cw
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−        entity = self.entity
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−        try:
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−            session.system_sql('INSERT INTO is_relation(eid_from,eid_to) VALUES (%s,%s)'
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−                           % (entity.eid, eschema_eid(session, entity.e_schema)))
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−        except IndexError:
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−            # during schema serialization, skip
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−            return
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−        for eschema in entity.e_schema.ancestors() + [entity.e_schema]:
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−            session.system_sql('INSERT INTO is_instance_of_relation(eid_from,eid_to) VALUES (%s,%s)'
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−                               % (entity.eid, eschema_eid(session, eschema)))
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−
+
−
+
−class SetOwnershipHook(MetaDataHook):
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−    """create a new entity -> set owner and creator metadata"""
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−    __regid__ = 'setowner'
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−    events = ('after_add_entity',)
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−
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−    def __call__(self):
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−        if not self._cw.is_internal_session:
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−            self._cw.add_relation(self.entity.eid, 'owned_by', self._cw.user.eid)
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−            hook.set_operation(self._cw, 'set_creator_op', self.entity.eid, _SetCreatorOp)
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−
+
−class _SyncOwnersOp(hook.Operation):
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−    def precommit_event(self):
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−        for compositeeid, composedeid in self.session.transaction_data.pop('sync_owners_op'):
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−            self.session.execute('SET X owned_by U WHERE C owned_by U, C eid %(c)s,'
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−                                 'NOT EXISTS(X owned_by U, X eid %(x)s)',
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−                                 {'c': compositeeid, 'x': composedeid})
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−
+
−
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−class SyncCompositeOwner(MetaDataHook):
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−    """when adding composite relation, the composed should have the same owners
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−    has the composite
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−    """
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−    __regid__ = 'synccompositeowner'
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−    events = ('after_add_relation',)
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−
+
−    def __call__(self):
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−        if self.rtype == 'wf_info_for':
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−            # skip this special composite relation # XXX (syt) why?
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−            return
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−        eidfrom, eidto = self.eidfrom, self.eidto
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−        composite = self._cw.schema_rproperty(self.rtype, eidfrom, eidto, 'composite')
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−        if composite == 'subject':
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−            hook.set_operation(self._cw, 'sync_owners_op', (eidfrom, eidto), _SyncOwnersOp)
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−        elif composite == 'object':
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−            hook.set_operation(self._cw, 'sync_owners_op', (eidto, eidfrom), _SyncOwnersOp)
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−
+
−
+
−class FixUserOwnershipHook(MetaDataHook):
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−    """when a user has been created, add owned_by relation on itself"""
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−    __regid__ = 'fixuserowner'
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−    __select__ = MetaDataHook.__select__ & implements('CWUser')
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−    events = ('after_add_entity',)
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−
+
−    def __call__(self):
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−        self._cw.add_relation(self.entity.eid, 'owned_by', self.entity.eid)
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−
+
−
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−class UpdateFTIHook(MetaDataHook):
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−    """sync fulltext index text index container when a relation with
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−    fulltext_container set is added / removed
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−    """
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−    __regid__ = 'updateftirel'
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−    events = ('after_add_relation', 'after_delete_relation')
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−
+
−    def __call__(self):
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−        rtype = self.rtype
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−        session = self._cw
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−        ftcontainer = session.vreg.schema.rschema(rtype).fulltext_container
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−        if ftcontainer == 'subject':
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−            session.repo.system_source.index_entity(
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−                session, session.entity_from_eid(self.eidfrom))
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−        elif ftcontainer == 'object':
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−            session.repo.system_source.index_entity(
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−                session, session.entity_from_eid(self.eidto))
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−