server/hooks.py
author Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
Thu, 13 Nov 2008 12:34:36 +0100
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use named substitutions in i18n strings
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"""Core hooks: check schema validity, unsure we are not deleting necessary
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entities...
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:organization: Logilab
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:copyright: 2001-2008 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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__docformat__ = "restructuredtext en"
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from mx.DateTime import now
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from cubicweb import UnknownProperty, ValidationError, BadConnectionId
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from cubicweb.common.uilib import soup2xhtml
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from cubicweb.server.pool import Operation, LateOperation, PreCommitOperation
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from cubicweb.server.hookhelper import (check_internal_entity, previous_state,
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                                     get_user_sessions, rproperty)
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from cubicweb.server.repository import FTIndexEntityOp
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def relation_deleted(session, eidfrom, rtype, eidto):
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    session.add_query_data('pendingrelations', (eidfrom, rtype, eidto))
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# base meta-data handling #####################################################
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def setctime_before_add_entity(session, entity):
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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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    if not 'creation_date' in entity:
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        entity['creation_date'] = now()
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    if not 'modification_date' in entity:
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        entity['modification_date'] = now()
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def setmtime_before_update_entity(session, entity):
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    """update an entity -> set modification date"""
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    if not 'modification_date' in entity:
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        entity['modification_date'] = now()
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class SetCreatorOp(PreCommitOperation):
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    def precommit_event(self):
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        if self.eid in self.session.query_data('pendingeids', ()):
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            # entity have been created and deleted in the same transaction
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            return
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        ueid = self.session.user.eid
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        execute = self.session.unsafe_execute
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        if not execute('Any X WHERE X created_by U, X eid %(x)s',
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                       {'x': self.eid}, 'x'): 
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            execute('SET X created_by U WHERE X eid %(x)s, U eid %(u)s',
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                    {'x': self.eid, 'u': ueid}, 'x')
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def setowner_after_add_entity(session, entity):
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    """create a new entity -> set owner and creator metadata"""
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    asession = session.actual_session()
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    if not asession.is_internal_session:
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        session.unsafe_execute('SET X owned_by U WHERE X eid %(x)s, U eid %(u)s',
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                               {'x': entity.eid, 'u': asession.user.eid}, 'x')
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        SetCreatorOp(asession, eid=entity.eid)
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def setis_after_add_entity(session, entity):
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    """create a new entity -> set is relation"""
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    session.unsafe_execute('SET X is E WHERE X eid %(x)s, E name %(name)s',
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                           {'x': entity.eid, 'name': entity.id}, 'x')
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    # XXX < 2.50 bw compat
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    if not session.get_shared_data('do-not-insert-is_instance_of'):
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        basetypes = entity.e_schema.ancestors() + [entity.e_schema]
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        session.unsafe_execute('SET X is_instance_of E WHERE X eid %%(x)s, E name IN (%s)' %
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                               ','.join("'%s'" % str(etype) for etype in basetypes),
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                               {'x': entity.eid}, 'x')
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def setowner_after_add_user(session, entity):
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    """when a user has been created, add owned_by relation on itself"""
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    session.unsafe_execute('SET X owned_by X WHERE X eid %(x)s',
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                           {'x': entity.eid}, 'x')
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def fti_update_after_add_relation(session, eidfrom, rtype, eidto):
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    """sync fulltext index when relevant relation is added. Reindexing the
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    contained entity is enough since it will implicitly reindex the container
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    entity.
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    """
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    ftcontainer = session.repo.schema.rschema(rtype).fulltext_container
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    if ftcontainer == 'subject':
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        FTIndexEntityOp(session, entity=session.entity(eidto))
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    elif ftcontainer == 'object':
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        FTIndexEntityOp(session, entity=session.entity(eidfrom))
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def fti_update_after_delete_relation(session, eidfrom, rtype, eidto):
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    """sync fulltext index when relevant relation is deleted. Reindexing both
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    entities is necessary.
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    """
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    if session.repo.schema.rschema(rtype).fulltext_container:
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        FTIndexEntityOp(session, entity=session.entity(eidto))
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        FTIndexEntityOp(session, entity=session.entity(eidfrom))
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class SyncOwnersOp(PreCommitOperation):
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    def precommit_event(self):
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        self.session.unsafe_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': self.compositeeid, 'x': self.composedeid},
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                                    ('c', 'x'))
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def sync_owner_after_add_composite_relation(session, eidfrom, rtype, eidto):
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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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    if rtype == 'wf_info_for':
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        # skip this special composite relation
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        return
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    composite = rproperty(session, rtype, eidfrom, eidto, 'composite')
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    if composite == 'subject':
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        SyncOwnersOp(session, compositeeid=eidfrom, composedeid=eidto)
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    elif composite == 'object':
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        SyncOwnersOp(session, compositeeid=eidto, composedeid=eidfrom)
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def _register_metadata_hooks(hm):
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    """register meta-data related hooks on the hooks manager"""
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    hm.register_hook(setctime_before_add_entity, 'before_add_entity', '')
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    hm.register_hook(setmtime_before_update_entity, 'before_update_entity', '')
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    hm.register_hook(setowner_after_add_entity, 'after_add_entity', '')
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    hm.register_hook(sync_owner_after_add_composite_relation, 'after_add_relation', '')
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    hm.register_hook(fti_update_after_add_relation, 'after_add_relation', '')
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    hm.register_hook(fti_update_after_delete_relation, 'after_delete_relation', '')
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    if 'is' in hm.schema:
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        hm.register_hook(setis_after_add_entity, 'after_add_entity', '')
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    if 'EUser' in hm.schema:
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        hm.register_hook(setowner_after_add_user, 'after_add_entity', 'EUser')
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# core hooks ##################################################################
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class DelayedDeleteOp(PreCommitOperation):
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    """delete the object of composite relation except if the relation
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    has actually been redirected to another composite
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    """
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    def precommit_event(self):
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        session = self.session
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        if not self.eid in session.query_data('pendingeids', ()):
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            etype = session.describe(self.eid)[0]
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            session.unsafe_execute('DELETE %s X WHERE X eid %%(x)s, NOT %s'
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                                   % (etype, self.relation),
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                                   {'x': self.eid}, 'x')
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def handle_composite_before_del_relation(session, eidfrom, rtype, eidto):
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    """delete the object of composite relation"""
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    composite = rproperty(session, rtype, eidfrom, eidto, 'composite')
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    if composite == 'subject':
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        DelayedDeleteOp(session, eid=eidto, relation='Y %s X' % rtype)
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    elif composite == 'object':
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        DelayedDeleteOp(session, eid=eidfrom, relation='X %s Y' % rtype)
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def before_del_group(session, eid):
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    """check that we don't remove the owners group"""
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    check_internal_entity(session, eid, ('owners',))
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# schema validation hooks #####################################################
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class CheckConstraintsOperation(LateOperation):
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    """check a new relation satisfy its constraints
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    """
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    def precommit_event(self):
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        eidfrom, rtype, eidto = self.rdef
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        # first check related entities have not been deleted in the same
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        # transaction
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        pending = self.session.query_data('pendingeids', ())
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        if eidfrom in pending:
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            return
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        if eidto in pending:
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            return
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        for constraint in self.constraints:
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            try:
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                constraint.repo_check(self.session, eidfrom, rtype, eidto)
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            except NotImplementedError:
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                self.critical('can\'t check constraint %s, not supported',
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                              constraint)
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    def commit_event(self):
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        pass
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def cstrcheck_after_add_relation(session, eidfrom, rtype, eidto):
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    """check the relation satisfy its constraints
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    this is delayed to a precommit time operation since other relation which
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    will make constraint satisfied may be added later.
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    """
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    constraints = rproperty(session, rtype, eidfrom, eidto, 'constraints')
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    if constraints:
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        CheckConstraintsOperation(session, constraints=constraints,
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                                  rdef=(eidfrom, rtype, eidto))
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def uniquecstrcheck_before_modification(session, entity):
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    eschema = entity.e_schema
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    for attr, val in entity.items():
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        if val is None:
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            continue
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        if eschema.subject_relation(attr).is_final() and \
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               eschema.has_unique_values(attr):
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            rql = '%s X WHERE X %s %%(val)s' % (entity.e_schema, attr)
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            rset = session.unsafe_execute(rql, {'val': val})
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            if rset and rset[0][0] != entity.eid:
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                msg = session._('the value "%s" is already used, use another one')
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                raise ValidationError(entity.eid, {attr: msg % val})
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class tidy_html_fields(object):
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    """tidy HTML in rich text strings
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    FIXME: (adim) the whole idea of having a class is to store the
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    event type. There might be another way to get dynamically the
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    event inside the hook function.
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    """
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    # FIXME hooks manager use func_name to register
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    func_name = 'tidy_html_field'
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    def __init__(self, event):
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        self.event = event
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    def __call__(self, session, entity):
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        for attr in entity.formatted_attrs():
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            value = entity.get(attr)
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            # text was not changed
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            if self.event == 'before_add_entity':
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                fmt = entity.get('%s_format' % attr)
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            else:
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                fmt = entity.get_value('%s_format' % attr)
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            if value and fmt == 'text/html':
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                entity[attr] = soup2xhtml(value, session.encoding)
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class CheckRequiredRelationOperation(LateOperation):
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    """checking relation cardinality has to be done after commit in
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    case the relation is being replaced
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    """
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    eid, rtype = None, None
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    def precommit_event(self):
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        # recheck pending eids
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        if self.eid in self.session.query_data('pendingeids', ()):
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            return
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        if self.session.unsafe_execute(*self._rql()).rowcount < 1:
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            etype = self.session.describe(self.eid)[0]
62
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            msg = self.session._('at least one relation %(rtype)s is required on %(etype)s (%(eid)s)')
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            raise ValidationError(self.eid, {self.rtype: msg % {'rtype': self.rtype,
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                                                                'etype': etype,
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                                                                'eid': self.eid}})
0
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    def commit_event(self):
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        pass
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    def _rql(self):
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        raise NotImplementedError()
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class CheckSRelationOp(CheckRequiredRelationOperation):
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    """check required subject relation"""
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    def _rql(self):
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        return 'Any O WHERE S eid %%(x)s, S %s O' % self.rtype, {'x': self.eid}, 'x'
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class CheckORelationOp(CheckRequiredRelationOperation):
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    """check required object relation"""
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    def _rql(self):
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        return 'Any S WHERE O eid %%(x)s, S %s O' % self.rtype, {'x': self.eid}, 'x'
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def checkrel_if_necessary(session, opcls, rtype, eid):
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    """check an equivalent operation has not already been added"""
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    for op in session.pending_operations:
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        if isinstance(op, opcls) and op.rtype == rtype and op.eid == eid:
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            break
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    else:
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        opcls(session, rtype=rtype, eid=eid)
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def cardinalitycheck_after_add_entity(session, entity):
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    """check cardinalities are satisfied"""
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    eid = entity.eid
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    for rschema, targetschemas, x in entity.e_schema.relation_definitions():
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        # skip automatically handled relations
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        if rschema.type in ('owned_by', 'created_by', 'is', 'is_instance_of'):
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            continue
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        if x == 'subject':
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            subjtype = entity.e_schema
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            objtype = targetschemas[0].type
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            cardindex = 0
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            opcls = CheckSRelationOp
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        else:
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            subjtype = targetschemas[0].type
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            objtype = entity.e_schema
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   292
            cardindex = 1
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   293
            opcls = CheckORelationOp
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   294
        card = rschema.rproperty(subjtype, objtype, 'cardinality')
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   295
        if card[cardindex] in '1+':
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   296
            checkrel_if_necessary(session, opcls, rschema.type, eid)
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   297
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   298
def cardinalitycheck_before_del_relation(session, eidfrom, rtype, eidto):
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   299
    """check cardinalities are satisfied"""
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   300
    card = rproperty(session, rtype, eidfrom, eidto, 'cardinality')
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   301
    pendingeids = session.query_data('pendingeids', ())
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   302
    if card[0] in '1+' and not eidfrom in pendingeids:
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   303
        checkrel_if_necessary(session, CheckSRelationOp, rtype, eidfrom)
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   304
    if card[1] in '1+' and not eidto in pendingeids:
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   305
        checkrel_if_necessary(session, CheckORelationOp, rtype, eidto)
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   306
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   307
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   308
def _register_core_hooks(hm):
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   309
    hm.register_hook(handle_composite_before_del_relation, 'before_delete_relation', '')
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   310
    hm.register_hook(before_del_group, 'before_delete_entity', 'EGroup')
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   311
    
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   312
    #hm.register_hook(cstrcheck_before_update_entity, 'before_update_entity', '')
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   313
    hm.register_hook(cardinalitycheck_after_add_entity, 'after_add_entity', '')
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diff changeset
   314
    hm.register_hook(cardinalitycheck_before_del_relation, 'before_delete_relation', '')
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parents:
diff changeset
   315
    hm.register_hook(cstrcheck_after_add_relation, 'after_add_relation', '')
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parents:
diff changeset
   316
    hm.register_hook(uniquecstrcheck_before_modification, 'before_add_entity', '')
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diff changeset
   317
    hm.register_hook(uniquecstrcheck_before_modification, 'before_update_entity', '')
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   318
    hm.register_hook(tidy_html_fields('before_add_entity'), 'before_add_entity', '')
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diff changeset
   319
    hm.register_hook(tidy_html_fields('before_update_entity'), 'before_update_entity', '')
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   320
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diff changeset
   321
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   322
# user/groups synchronisation #################################################
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   323
            
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   324
class GroupOperation(Operation):
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   325
    """base class for group operation"""
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diff changeset
   326
    geid = None
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   327
    def __init__(self, session, *args, **kwargs):
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   328
        """override to get the group name before actual groups manipulation:
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diff changeset
   329
        
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   330
        we may temporarily loose right access during a commit event, so
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diff changeset
   331
        no query should be emitted while comitting
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diff changeset
   332
        """
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diff changeset
   333
        rql = 'Any N WHERE G eid %(x)s, G name N'
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diff changeset
   334
        result = session.execute(rql, {'x': kwargs['geid']}, 'x', build_descr=False)
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diff changeset
   335
        Operation.__init__(self, session, *args, **kwargs)
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diff changeset
   336
        self.group = result[0][0]
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diff changeset
   337
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   338
class DeleteGroupOp(GroupOperation):
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diff changeset
   339
    """synchronize user when a in_group relation has been deleted"""
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diff changeset
   340
    def commit_event(self):
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diff changeset
   341
        """the observed connections pool has been commited"""
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diff changeset
   342
        groups = self.cnxuser.groups
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diff changeset
   343
        try:
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   344
            groups.remove(self.group)
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diff changeset
   345
        except KeyError:
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diff changeset
   346
            self.error('user %s not in group %s',  self.cnxuser, self.group)
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diff changeset
   347
            return
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diff changeset
   348
    
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diff changeset
   349
def after_del_in_group(session, fromeid, rtype, toeid):
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   350
    """modify user permission, need to update users"""
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diff changeset
   351
    for session_ in get_user_sessions(session.repo, fromeid):
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diff changeset
   352
        DeleteGroupOp(session, cnxuser=session_.user, geid=toeid)
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diff changeset
   353
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diff changeset
   354
        
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diff changeset
   355
class AddGroupOp(GroupOperation):
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diff changeset
   356
    """synchronize user when a in_group relation has been added"""
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diff changeset
   357
    def commit_event(self):
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diff changeset
   358
        """the observed connections pool has been commited"""
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diff changeset
   359
        groups = self.cnxuser.groups
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diff changeset
   360
        if self.group in groups:
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diff changeset
   361
            self.warning('user %s already in group %s', self.cnxuser,
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diff changeset
   362
                         self.group)
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diff changeset
   363
            return
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diff changeset
   364
        groups.add(self.group)
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parents:
diff changeset
   365
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diff changeset
   366
def after_add_in_group(session, fromeid, rtype, toeid):
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diff changeset
   367
    """modify user permission, need to update users"""
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diff changeset
   368
    for session_ in get_user_sessions(session.repo, fromeid):
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diff changeset
   369
        AddGroupOp(session, cnxuser=session_.user, geid=toeid)
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parents:
diff changeset
   370
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parents:
diff changeset
   371
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diff changeset
   372
class DelUserOp(Operation):
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diff changeset
   373
    """synchronize user when a in_group relation has been added"""
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diff changeset
   374
    def __init__(self, session, cnxid):
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parents:
diff changeset
   375
        self.cnxid = cnxid
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diff changeset
   376
        Operation.__init__(self, session)
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parents:
diff changeset
   377
        
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diff changeset
   378
    def commit_event(self):
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diff changeset
   379
        """the observed connections pool has been commited"""
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parents:
diff changeset
   380
        try:
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diff changeset
   381
            self.repo.close(self.cnxid)
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diff changeset
   382
        except BadConnectionId:
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diff changeset
   383
            pass # already closed
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parents:
diff changeset
   384
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diff changeset
   385
def after_del_user(session, eid):
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parents:
diff changeset
   386
    """modify user permission, need to update users"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   387
    for session_ in get_user_sessions(session.repo, eid):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   388
        DelUserOp(session, session_.id)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   389
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   390
def _register_usergroup_hooks(hm):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   391
    """register user/group related hooks on the hooks manager"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   392
    hm.register_hook(after_del_user, 'after_delete_entity', 'EUser')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   393
    hm.register_hook(after_add_in_group, 'after_add_relation', 'in_group')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   394
    hm.register_hook(after_del_in_group, 'after_delete_relation', 'in_group')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   395
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   396
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   397
# workflow handling ###########################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   398
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   399
def before_add_in_state(session, fromeid, rtype, toeid):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   400
    """check the transition is allowed and record transition information
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   401
    """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   402
    assert rtype == 'in_state'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   403
    state = previous_state(session, fromeid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   404
    etype = session.describe(fromeid)[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   405
    if not (session.is_super_session or 'managers' in session.user.groups):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   406
        if not state is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   407
            entity = session.entity(fromeid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   408
            # we should find at least one transition going to this state
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   409
            try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   410
                iter(state.transitions(entity, toeid)).next()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   411
            except StopIteration:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   412
                msg = session._('transition is not allowed')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   413
                raise ValidationError(fromeid, {'in_state': msg})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   414
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   415
            # not a transition
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   416
            # check state is initial state if the workflow defines one
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   417
            isrset = session.unsafe_execute('Any S WHERE ET initial_state S, ET name %(etype)s',
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   418
                                            {'etype': etype})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   419
            if isrset and not toeid == isrset[0][0]:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   420
                msg = session._('not the initial state for this entity')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   421
                raise ValidationError(fromeid, {'in_state': msg})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   422
    eschema = session.repo.schema[etype]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   423
    if not 'wf_info_for' in eschema.object_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   424
        # workflow history not activated for this entity type
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   425
        return
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   426
    rql = 'INSERT TrInfo T: T wf_info_for E, T to_state DS, T comment %(comment)s'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   427
    args = {'comment': session.get_shared_data('trcomment', None, pop=True),
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   428
            'e': fromeid, 'ds': toeid}
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   429
    cformat = session.get_shared_data('trcommentformat', None, pop=True)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   430
    if cformat is not None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   431
        args['comment_format'] = cformat
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   432
        rql += ', T comment_format %(comment_format)s'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   433
    restriction = ['DS eid %(ds)s, E eid %(e)s']
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   434
    if not state is None: # not a transition
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   435
        rql += ', T from_state FS'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   436
        restriction.append('FS eid %(fs)s')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   437
        args['fs'] = state.eid
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   438
    rql = '%s WHERE %s' % (rql, ', '.join(restriction))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   439
    session.unsafe_execute(rql, args, 'e')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   440
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   441
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   442
class SetInitialStateOp(PreCommitOperation):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   443
    """make initial state be a default state"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   444
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   445
    def precommit_event(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   446
        session = self.session
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   447
        entity = self.entity
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   448
        rset = session.execute('Any S WHERE ET initial_state S, ET name %(name)s',
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   449
                               {'name': str(entity.e_schema)})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   450
        # if there is an initial state and the entity's state is not set,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   451
        # use the initial state as a default state
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   452
        pendingeids = session.query_data('pendingeids', ())
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   453
        if rset and not entity.eid in pendingeids and not entity.in_state:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   454
            session.unsafe_execute('SET X in_state S WHERE X eid %(x)s, S eid %(s)s',
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   455
                                   {'x' : entity.eid, 's' : rset[0][0]}, 'x')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   456
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   457
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   458
def set_initial_state_after_add(session, entity):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   459
    SetInitialStateOp(session, entity=entity)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   460
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   461
def _register_wf_hooks(hm):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   462
    """register workflow related hooks on the hooks manager"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   463
    if 'in_state' in hm.schema:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   464
        hm.register_hook(before_add_in_state, 'before_add_relation', 'in_state')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   465
        hm.register_hook(relation_deleted, 'before_delete_relation', 'in_state')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   466
        for eschema in hm.schema.entities():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   467
            if 'in_state' in eschema.subject_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   468
                hm.register_hook(set_initial_state_after_add, 'after_add_entity',
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   469
                                 str(eschema))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   470
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   471
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   472
# EProperty hooks #############################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   473
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   474
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   475
class DelEPropertyOp(Operation):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   476
    """a user's custom properties has been deleted"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   477
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   478
    def commit_event(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   479
        """the observed connections pool has been commited"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   480
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   481
            del self.epropdict[self.key]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   482
        except KeyError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   483
            self.error('%s has no associated value', self.key)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   484
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   485
class ChangeEPropertyOp(Operation):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   486
    """a user's custom properties has been added/changed"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   487
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   488
    def commit_event(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   489
        """the observed connections pool has been commited"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   490
        self.epropdict[self.key] = self.value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   491
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   492
class AddEPropertyOp(Operation):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   493
    """a user's custom properties has been added/changed"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   494
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   495
    def commit_event(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   496
        """the observed connections pool has been commited"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   497
        eprop = self.eprop
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   498
        if not eprop.for_user:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   499
            self.repo.vreg.eprop_values[eprop.pkey] = eprop.value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   500
        # if for_user is set, update is handled by a ChangeEPropertyOp operation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   501
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   502
def after_add_eproperty(session, entity):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   503
    key, value = entity.pkey, entity.value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   504
    try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   505
        value = session.vreg.typed_value(key, value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   506
    except UnknownProperty:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   507
        raise ValidationError(entity.eid, {'pkey': session._('unknown property key')})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   508
    except ValueError, ex:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   509
        raise ValidationError(entity.eid, {'value': session._(str(ex))})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   510
    if not session.user.matching_groups('managers'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   511
        session.unsafe_execute('SET P for_user U WHERE P eid %(x)s,U eid %(u)s',
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   512
                               {'x': entity.eid, 'u': session.user.eid}, 'x')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   513
    else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   514
        AddEPropertyOp(session, eprop=entity)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   515
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   516
def after_update_eproperty(session, entity):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   517
    key, value = entity.pkey, entity.value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   518
    try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   519
        value = session.vreg.typed_value(key, value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   520
    except UnknownProperty:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   521
        return
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   522
    except ValueError, ex:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   523
        raise ValidationError(entity.eid, {'value': session._(str(ex))})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   524
    if entity.for_user:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   525
        for session_ in get_user_sessions(session.repo, entity.for_user[0].eid):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   526
            ChangeEPropertyOp(session, epropdict=session_.user.properties,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   527
                              key=key, value=value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   528
    else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   529
        # site wide properties
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   530
        ChangeEPropertyOp(session, epropdict=session.vreg.eprop_values,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   531
                          key=key, value=value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   532
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   533
def before_del_eproperty(session, eid):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   534
    for eidfrom, rtype, eidto in session.query_data('pendingrelations', ()):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   535
        if rtype == 'for_user' and eidfrom == eid:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   536
            # if for_user was set, delete has already been handled
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   537
            break
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   538
    else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   539
        key = session.execute('Any K WHERE P eid %(x)s, P pkey K',
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   540
                              {'x': eid}, 'x')[0][0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   541
        DelEPropertyOp(session, epropdict=session.vreg.eprop_values, key=key)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   542
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   543
def after_add_for_user(session, fromeid, rtype, toeid):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   544
    if not session.describe(fromeid)[0] == 'EProperty':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   545
        return
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   546
    key, value = session.execute('Any K,V WHERE P eid %(x)s,P pkey K,P value V',
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   547
                                 {'x': fromeid}, 'x')[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   548
    if session.vreg.property_info(key)['sitewide']:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   549
        raise ValidationError(fromeid,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   550
                              {'for_user': session._("site-wide property can't be set for user")})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   551
    for session_ in get_user_sessions(session.repo, toeid):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   552
        ChangeEPropertyOp(session, epropdict=session_.user.properties,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   553
                          key=key, value=value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   554
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   555
def before_del_for_user(session, fromeid, rtype, toeid):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   556
    key = session.execute('Any K WHERE P eid %(x)s, P pkey K',
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   557
                          {'x': fromeid}, 'x')[0][0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   558
    relation_deleted(session, fromeid, rtype, toeid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   559
    for session_ in get_user_sessions(session.repo, toeid):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   560
        DelEPropertyOp(session, epropdict=session_.user.properties, key=key)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   561
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   562
def _register_eproperty_hooks(hm):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   563
    """register workflow related hooks on the hooks manager"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   564
    hm.register_hook(after_add_eproperty, 'after_add_entity', 'EProperty')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   565
    hm.register_hook(after_update_eproperty, 'after_update_entity', 'EProperty')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   566
    hm.register_hook(before_del_eproperty, 'before_delete_entity', 'EProperty')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   567
    hm.register_hook(after_add_for_user, 'after_add_relation', 'for_user')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   568
    hm.register_hook(before_del_for_user, 'before_delete_relation', 'for_user')