hooks/email.py
author Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
Wed, 16 Feb 2011 09:02:00 +0100
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# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# 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
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""hooks to ensure use_email / primary_email relations consistency
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"""
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__docformat__ = "restructuredtext en"
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from cubicweb.server import hook
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from logilab.common.compat import any
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class SetUseEmailRelationOp(hook.Operation):
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    """delay this operation to commit to avoid conflict with a late rql query
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    already setting the relation
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    """
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    rtype = 'use_email'
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    entity = email = None # make pylint happy
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    def condition(self):
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        """check entity has use_email set for the email address"""
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        return not any(e for e in self.entity.use_email
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                       if self.email.eid == e.eid)
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    def precommit_event(self):
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        if self.condition():
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            self.session.execute(
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                'SET X %s Y WHERE X eid %%(x)s, Y eid %%(y)s' % self.rtype,
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                {'x': self.entity.eid, 'y': self.email.eid})
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class SetPrimaryEmailRelationOp(SetUseEmailRelationOp):
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    rtype = 'primary_email'
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    def condition(self):
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        """check entity has no primary_email set"""
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        return not self.entity.primary_email
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class SetPrimaryEmailHook(hook.Hook):
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    """notify when a bug or story or version has its state modified"""
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    __regid__ = 'setprimaryemail'
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    __select__ = hook.Hook.__select__ & hook.match_rtype('use_email')
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    category = 'email'
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    events = ('after_add_relation',)
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    def __call__(self):
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        entity = self._cw.entity_from_eid(self.eidfrom)
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        if 'primary_email' in entity.e_schema.subject_relations():
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            SetPrimaryEmailRelationOp(self._cw, entity=entity,
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                                      email=self._cw.entity_from_eid(self.eidto))
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class SetUseEmailHook(hook.Hook):
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    """notify when a bug or story or version has its state modified"""
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    __regid__ = 'setprimaryemail'
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    __select__ = hook.Hook.__select__ & hook.match_rtype('primary_email')
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    category = 'email'
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    events = ('after_add_relation',)
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    def __call__(self):
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        entity = self._cw.entity_from_eid(self.eidfrom)
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        if 'use_email' in entity.e_schema.subject_relations():
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            SetUseEmailRelationOp(self._cw, entity=entity,
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                                  email=self._cw.entity_from_eid(self.eidto))