"""Core hooks: check schema validity, unsure we are not deleting necessary
entities...
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
__docformat__ = "restructuredtext en"
from datetime import datetime
from cubicweb import UnknownProperty, ValidationError, BadConnectionId
from cubicweb.schema import RQLVocabularyConstraint
from cubicweb.server.pool import Operation, LateOperation, PreCommitOperation
from cubicweb.server.hookhelper import (check_internal_entity,
get_user_sessions, rproperty)
from cubicweb.server.repository import FTIndexEntityOp
# special relations that don't have to be checked for integrity, usually
# because they are handled internally by hooks (so we trust ourselves)
DONT_CHECK_RTYPES_ON_ADD = set(('owned_by', 'created_by',
'is', 'is_instance_of',
'wf_info_for', 'from_state', 'to_state'))
DONT_CHECK_RTYPES_ON_DEL = set(('is', 'is_instance_of',
'wf_info_for', 'from_state', 'to_state'))
def relation_deleted(session, eidfrom, rtype, eidto):
session.transaction_data.setdefault('pendingrelations', []).append(
(eidfrom, rtype, eidto))
def eschema_type_eid(session, etype):
"""get eid of the CWEType entity for the given yams type"""
eschema = session.repo.schema.eschema(etype)
# eschema.eid is None if schema has been readen from the filesystem, not
# from the database (eg during tests)
if eschema.eid is None:
eschema.eid = session.unsafe_execute(
'Any X WHERE X is CWEType, X name %(name)s',
{'name': str(etype)})[0][0]
return eschema.eid
# base meta-data handling ######################################################
def setctime_before_add_entity(session, entity):
"""before create a new entity -> set creation and modification date
this is a conveniency hook, you shouldn't have to disable it
"""
timestamp = datetime.now()
entity.setdefault('creation_date', timestamp)
entity.setdefault('modification_date', timestamp)
if not session.get_shared_data('do-not-insert-cwuri'):
entity.setdefault('cwuri', u'%seid/%s' % (session.base_url(), entity.eid))
def setmtime_before_update_entity(session, entity):
"""update an entity -> set modification date"""
entity.setdefault('modification_date', datetime.now())
class SetCreatorOp(PreCommitOperation):
def precommit_event(self):
session = self.session
if self.entity.eid in session.transaction_data.get('pendingeids', ()):
# entity have been created and deleted in the same transaction
return
if not self.entity.created_by:
session.add_relation(self.entity.eid, 'created_by', session.user.eid)
def setowner_after_add_entity(session, entity):
"""create a new entity -> set owner and creator metadata"""
asession = session.actual_session()
if not asession.is_internal_session:
session.add_relation(entity.eid, 'owned_by', asession.user.eid)
SetCreatorOp(asession, entity=entity)
def setis_after_add_entity(session, entity):
"""create a new entity -> set is relation"""
if hasattr(entity, '_cw_recreating'):
return
try:
#session.add_relation(entity.eid, 'is',
# eschema_type_eid(session, entity.id))
session.system_sql('INSERT INTO is_relation(eid_from,eid_to) VALUES (%s,%s)'
% (entity.eid, eschema_type_eid(session, entity.id)))
except IndexError:
# during schema serialization, skip
return
for etype in entity.e_schema.ancestors() + [entity.e_schema]:
#session.add_relation(entity.eid, 'is_instance_of',
# eschema_type_eid(session, etype))
session.system_sql('INSERT INTO is_instance_of_relation(eid_from,eid_to) VALUES (%s,%s)'
% (entity.eid, eschema_type_eid(session, etype)))
def setowner_after_add_user(session, entity):
"""when a user has been created, add owned_by relation on itself"""
session.add_relation(entity.eid, 'owned_by', entity.eid)
def fti_update_after_add_relation(session, eidfrom, rtype, eidto):
"""sync fulltext index when relevant relation is added. Reindexing the
contained entity is enough since it will implicitly reindex the container
entity.
"""
ftcontainer = session.repo.schema.rschema(rtype).fulltext_container
if ftcontainer == 'subject':
FTIndexEntityOp(session, entity=session.entity_from_eid(eidto))
elif ftcontainer == 'object':
FTIndexEntityOp(session, entity=session.entity_from_eid(eidfrom))
def fti_update_after_delete_relation(session, eidfrom, rtype, eidto):
"""sync fulltext index when relevant relation is deleted. Reindexing both
entities is necessary.
"""
if session.repo.schema.rschema(rtype).fulltext_container:
FTIndexEntityOp(session, entity=session.entity_from_eid(eidto))
FTIndexEntityOp(session, entity=session.entity_from_eid(eidfrom))
class SyncOwnersOp(PreCommitOperation):
def precommit_event(self):
self.session.unsafe_execute('SET X owned_by U WHERE C owned_by U, C eid %(c)s,'
'NOT EXISTS(X owned_by U, X eid %(x)s)',
{'c': self.compositeeid, 'x': self.composedeid},
('c', 'x'))
def sync_owner_after_add_composite_relation(session, eidfrom, rtype, eidto):
"""when adding composite relation, the composed should have the same owners
has the composite
"""
if rtype == 'wf_info_for':
# skip this special composite relation # XXX (syt) why?
return
composite = rproperty(session, rtype, eidfrom, eidto, 'composite')
if composite == 'subject':
SyncOwnersOp(session, compositeeid=eidfrom, composedeid=eidto)
elif composite == 'object':
SyncOwnersOp(session, compositeeid=eidto, composedeid=eidfrom)
def _register_metadata_hooks(hm):
"""register meta-data related hooks on the hooks manager"""
hm.register_hook(setctime_before_add_entity, 'before_add_entity', '')
hm.register_hook(setmtime_before_update_entity, 'before_update_entity', '')
hm.register_hook(setowner_after_add_entity, 'after_add_entity', '')
hm.register_hook(sync_owner_after_add_composite_relation, 'after_add_relation', '')
hm.register_hook(fti_update_after_add_relation, 'after_add_relation', '')
hm.register_hook(fti_update_after_delete_relation, 'after_delete_relation', '')
if 'is' in hm.schema:
hm.register_hook(setis_after_add_entity, 'after_add_entity', '')
if 'CWUser' in hm.schema:
hm.register_hook(setowner_after_add_user, 'after_add_entity', 'CWUser')
# core hooks ##################################################################
class DelayedDeleteOp(PreCommitOperation):
"""delete the object of composite relation except if the relation
has actually been redirected to another composite
"""
def precommit_event(self):
session = self.session
# don't do anything if the entity is being created or deleted
if not (self.eid in session.transaction_data.get('pendingeids', ()) or
self.eid in session.transaction_data.get('neweids', ())):
etype = session.describe(self.eid)[0]
if self.role == 'subject':
rql = 'DELETE %s X WHERE X eid %%(x)s, NOT X %s Y'
else: # self.role == 'object':
rql = 'DELETE %s X WHERE X eid %%(x)s, NOT Y %s X'
session.unsafe_execute(rql % (etype, self.rtype), {'x': self.eid}, 'x')
def handle_composite_before_del_relation(session, eidfrom, rtype, eidto):
"""delete the object of composite relation"""
# if the relation is being delete, don't delete composite's components
# automatically
pendingrdefs = session.transaction_data.get('pendingrdefs', ())
if (session.describe(eidfrom)[0], rtype, session.describe(eidto)[0]) in pendingrdefs:
return
composite = rproperty(session, rtype, eidfrom, eidto, 'composite')
if composite == 'subject':
DelayedDeleteOp(session, eid=eidto, rtype=rtype, role='object')
elif composite == 'object':
DelayedDeleteOp(session, eid=eidfrom, rtype=rtype, role='subject')
def before_del_group(session, eid):
"""check that we don't remove the owners group"""
check_internal_entity(session, eid, ('owners',))
# schema validation hooks #####################################################
class CheckConstraintsOperation(LateOperation):
"""check a new relation satisfy its constraints
"""
def precommit_event(self):
eidfrom, rtype, eidto = self.rdef
# first check related entities have not been deleted in the same
# transaction
pending = self.session.transaction_data.get('pendingeids', ())
if eidfrom in pending:
return
if eidto in pending:
return
for constraint in self.constraints:
try:
constraint.repo_check(self.session, eidfrom, rtype, eidto)
except NotImplementedError:
self.critical('can\'t check constraint %s, not supported',
constraint)
def commit_event(self):
pass
def cstrcheck_after_add_relation(session, eidfrom, rtype, eidto):
"""check the relation satisfy its constraints
this is delayed to a precommit time operation since other relation which
will make constraint satisfied may be added later.
"""
if session.is_super_session:
return
constraints = rproperty(session, rtype, eidfrom, eidto, 'constraints')
if constraints:
CheckConstraintsOperation(session, constraints=constraints,
rdef=(eidfrom, rtype, eidto))
def uniquecstrcheck_before_modification(session, entity):
if session.is_super_session:
return
eschema = entity.e_schema
for attr, val in entity.items():
if val is None:
continue
if eschema.subjrels[attr].final and \
eschema.has_unique_values(attr):
rql = '%s X WHERE X %s %%(val)s' % (entity.e_schema, attr)
rset = session.unsafe_execute(rql, {'val': val})
if rset and rset[0][0] != entity.eid:
msg = session._('the value "%s" is already used, use another one')
raise ValidationError(entity.eid, {attr: msg % val})
def cstrcheck_after_update_attributes(session, entity):
if session.is_super_session:
return
schema = session.vreg.schema
for attr in entity.edited_attributes:
if schema.rschema(attr).final:
constraints = [c for c in entity.e_schema.constraints(attr)
if isinstance(c, RQLVocabularyConstraint)]
if constraints:
CheckConstraintsOperation(session, rdef=(entity.eid, attr, None),
constraints=constraints)
class CheckRequiredRelationOperation(LateOperation):
"""checking relation cardinality has to be done after commit in
case the relation is being replaced
"""
eid, rtype = None, None
def precommit_event(self):
# recheck pending eids
if self.eid in self.session.transaction_data.get('pendingeids', ()):
return
if self.session.unsafe_execute(*self._rql()).rowcount < 1:
etype = self.session.describe(self.eid)[0]
_ = self.session._
msg = _('at least one relation %(rtype)s is required on %(etype)s (%(eid)s)')
msg %= {'rtype': _(self.rtype), 'etype': _(etype), 'eid': self.eid}
raise ValidationError(self.eid, {self.rtype: msg})
def commit_event(self):
pass
def _rql(self):
raise NotImplementedError()
class CheckSRelationOp(CheckRequiredRelationOperation):
"""check required subject relation"""
def _rql(self):
return 'Any O WHERE S eid %%(x)s, S %s O' % self.rtype, {'x': self.eid}, 'x'
class CheckORelationOp(CheckRequiredRelationOperation):
"""check required object relation"""
def _rql(self):
return 'Any S WHERE O eid %%(x)s, S %s O' % self.rtype, {'x': self.eid}, 'x'
def checkrel_if_necessary(session, opcls, rtype, eid):
"""check an equivalent operation has not already been added"""
for op in session.pending_operations:
if isinstance(op, opcls) and op.rtype == rtype and op.eid == eid:
break
else:
opcls(session, rtype=rtype, eid=eid)
def cardinalitycheck_after_add_entity(session, entity):
"""check cardinalities are satisfied"""
if session.is_super_session:
return
eid = entity.eid
for rschema, targetschemas, x in entity.e_schema.relation_definitions():
# skip automatically handled relations
if rschema.type in DONT_CHECK_RTYPES_ON_ADD:
continue
if x == 'subject':
subjtype = entity.e_schema
objtype = targetschemas[0].type
cardindex = 0
opcls = CheckSRelationOp
else:
subjtype = targetschemas[0].type
objtype = entity.e_schema
cardindex = 1
opcls = CheckORelationOp
card = rschema.rproperty(subjtype, objtype, 'cardinality')
if card[cardindex] in '1+':
checkrel_if_necessary(session, opcls, rschema.type, eid)
def cardinalitycheck_before_del_relation(session, eidfrom, rtype, eidto):
"""check cardinalities are satisfied"""
if session.is_super_session:
return
if rtype in DONT_CHECK_RTYPES_ON_DEL:
return
card = rproperty(session, rtype, eidfrom, eidto, 'cardinality')
pendingrdefs = session.transaction_data.get('pendingrdefs', ())
if (session.describe(eidfrom)[0], rtype, session.describe(eidto)[0]) in pendingrdefs:
return
pendingeids = session.transaction_data.get('pendingeids', ())
if card[0] in '1+' and not eidfrom in pendingeids:
checkrel_if_necessary(session, CheckSRelationOp, rtype, eidfrom)
if card[1] in '1+' and not eidto in pendingeids:
checkrel_if_necessary(session, CheckORelationOp, rtype, eidto)
def _register_core_hooks(hm):
hm.register_hook(handle_composite_before_del_relation, 'before_delete_relation', '')
hm.register_hook(before_del_group, 'before_delete_entity', 'CWGroup')
#hm.register_hook(cstrcheck_before_update_entity, 'before_update_entity', '')
hm.register_hook(cardinalitycheck_after_add_entity, 'after_add_entity', '')
hm.register_hook(cardinalitycheck_before_del_relation, 'before_delete_relation', '')
hm.register_hook(cstrcheck_after_add_relation, 'after_add_relation', '')
hm.register_hook(uniquecstrcheck_before_modification, 'before_add_entity', '')
hm.register_hook(uniquecstrcheck_before_modification, 'before_update_entity', '')
hm.register_hook(cstrcheck_after_update_attributes, 'after_add_entity', '')
hm.register_hook(cstrcheck_after_update_attributes, 'after_update_entity', '')
# user/groups synchronisation #################################################
class GroupOperation(Operation):
"""base class for group operation"""
geid = None
def __init__(self, session, *args, **kwargs):
"""override to get the group name before actual groups manipulation:
we may temporarily loose right access during a commit event, so
no query should be emitted while comitting
"""
rql = 'Any N WHERE G eid %(x)s, G name N'
result = session.execute(rql, {'x': kwargs['geid']}, 'x', build_descr=False)
Operation.__init__(self, session, *args, **kwargs)
self.group = result[0][0]
class DeleteGroupOp(GroupOperation):
"""synchronize user when a in_group relation has been deleted"""
def commit_event(self):
"""the observed connections pool has been commited"""
groups = self.cnxuser.groups
try:
groups.remove(self.group)
except KeyError:
self.error('user %s not in group %s', self.cnxuser, self.group)
return
def after_del_in_group(session, fromeid, rtype, toeid):
"""modify user permission, need to update users"""
for session_ in get_user_sessions(session.repo, fromeid):
DeleteGroupOp(session, cnxuser=session_.user, geid=toeid)
class AddGroupOp(GroupOperation):
"""synchronize user when a in_group relation has been added"""
def commit_event(self):
"""the observed connections pool has been commited"""
groups = self.cnxuser.groups
if self.group in groups:
self.warning('user %s already in group %s', self.cnxuser,
self.group)
return
groups.add(self.group)
def after_add_in_group(session, fromeid, rtype, toeid):
"""modify user permission, need to update users"""
for session_ in get_user_sessions(session.repo, fromeid):
AddGroupOp(session, cnxuser=session_.user, geid=toeid)
class DelUserOp(Operation):
"""synchronize user when a in_group relation has been added"""
def __init__(self, session, cnxid):
self.cnxid = cnxid
Operation.__init__(self, session)
def commit_event(self):
"""the observed connections pool has been commited"""
try:
self.repo.close(self.cnxid)
except BadConnectionId:
pass # already closed
def after_del_user(session, eid):
"""modify user permission, need to update users"""
for session_ in get_user_sessions(session.repo, eid):
DelUserOp(session, session_.id)
def _register_usergroup_hooks(hm):
"""register user/group related hooks on the hooks manager"""
hm.register_hook(after_del_user, 'after_delete_entity', 'CWUser')
hm.register_hook(after_add_in_group, 'after_add_relation', 'in_group')
hm.register_hook(after_del_in_group, 'after_delete_relation', 'in_group')
# workflow handling ###########################################################
from cubicweb.entities.wfobjs import WorkflowTransition, WorkflowException
def _change_state(session, x, oldstate, newstate):
nocheck = session.transaction_data.setdefault('skip-security', set())
nocheck.add((x, 'in_state', oldstate))
nocheck.add((x, 'in_state', newstate))
# delete previous state first in case we're using a super session
fromsource = session.describe(x)[1]
# don't try to remove previous state if in_state isn't stored in the system
# source
if fromsource == 'system' or \
not session.repo.sources_by_uri[fromsource].support_relation('in_state'):
session.delete_relation(x, 'in_state', oldstate)
session.add_relation(x, 'in_state', newstate)
class FireAutotransitionOp(PreCommitOperation):
"""try to fire auto transition after state changes"""
def precommit_event(self):
session = self.session
entity = self.entity
autotrs = list(entity.possible_transitions('auto'))
if autotrs:
assert len(autotrs) == 1
entity.fire_transition(autotrs[0])
def before_add_trinfo(session, entity):
"""check the transition is allowed, add missing information. Expect that:
* wf_info_for inlined relation is set
* by_transition or to_state (managers only) inlined relation is set
"""
# first retreive entity to which the state change apply
try:
foreid = entity['wf_info_for']
except KeyError:
msg = session._('mandatory relation')
raise ValidationError(entity.eid, {'wf_info_for': msg})
forentity = session.entity_from_eid(foreid)
# then check it has a workflow set, unless we're in the process of changing
# entity's workflow
if session.transaction_data.get((forentity.eid, 'customwf')):
wfeid = session.transaction_data[(forentity.eid, 'customwf')]
wf = session.entity_from_eid(wfeid)
else:
wf = forentity.current_workflow
if wf is None:
msg = session._('related entity has no workflow set')
raise ValidationError(entity.eid, {None: msg})
# then check it has a state set
fromstate = forentity.current_state
if fromstate is None:
msg = session._('related entity has no state')
raise ValidationError(entity.eid, {None: msg})
# True if we are coming back from subworkflow
swtr = session.transaction_data.pop((forentity.eid, 'subwfentrytr'), None)
cowpowers = session.is_super_session or 'managers' in session.user.groups
# no investigate the requested state change...
try:
treid = entity['by_transition']
except KeyError:
# no transition set, check user is a manager and destination state is
# specified (and valid)
if not cowpowers:
msg = session._('mandatory relation')
raise ValidationError(entity.eid, {'by_transition': msg})
deststateeid = entity.get('to_state')
if not deststateeid:
msg = session._('mandatory relation')
raise ValidationError(entity.eid, {'by_transition': msg})
deststate = wf.state_by_eid(deststateeid)
if not cowpowers and deststate is None:
msg = entity.req._("state doesn't belong to entity's workflow")
raise ValidationError(entity.eid, {'to_state': msg})
else:
# check transition is valid and allowed, unless we're coming back from
# subworkflow
tr = session.entity_from_eid(treid)
if swtr is None:
if tr is None:
msg = session._("transition doesn't belong to entity's workflow")
raise ValidationError(entity.eid, {'by_transition': msg})
if not tr.has_input_state(fromstate):
msg = session._("transition isn't allowed")
raise ValidationError(entity.eid, {'by_transition': msg})
if not tr.may_be_fired(foreid):
msg = session._("transition may not be fired")
raise ValidationError(entity.eid, {'by_transition': msg})
if entity.get('to_state'):
deststateeid = entity['to_state']
if not cowpowers and deststateeid != tr.destination().eid:
msg = session._("transition isn't allowed")
raise ValidationError(entity.eid, {'by_transition': msg})
if swtr is None:
deststate = session.entity_from_eid(deststateeid)
if not cowpowers and deststate is None:
msg = entity.req._("state doesn't belong to entity's workflow")
raise ValidationError(entity.eid, {'to_state': msg})
else:
deststateeid = tr.destination().eid
# everything is ok, add missing information on the trinfo entity
entity['from_state'] = fromstate.eid
entity['to_state'] = deststateeid
nocheck = session.transaction_data.setdefault('skip-security', set())
nocheck.add((entity.eid, 'from_state', fromstate.eid))
nocheck.add((entity.eid, 'to_state', deststateeid))
FireAutotransitionOp(session, entity=forentity)
def after_add_trinfo(session, entity):
"""change related entity state"""
_change_state(session, entity['wf_info_for'],
entity['from_state'], entity['to_state'])
forentity = session.entity_from_eid(entity['wf_info_for'])
assert forentity.current_state.eid == entity['to_state'], (
forentity.eid, forentity.current_state.name)
if forentity.main_workflow.eid != forentity.current_workflow.eid:
SubWorkflowExitOp(session, forentity=forentity, trinfo=entity)
class SubWorkflowExitOp(PreCommitOperation):
def precommit_event(self):
session = self.session
forentity = self.forentity
trinfo = self.trinfo
# we're in a subworkflow, check if we've reached an exit point
wftr = forentity.subworkflow_input_transition()
if wftr is None:
# inconsistency detected
msg = session._("state doesn't belong to entity's current workflow")
raise ValidationError(self.trinfo.eid, {'to_state': msg})
tostate = wftr.get_exit_point(forentity, trinfo['to_state'])
if tostate is not None:
# reached an exit point
msg = session._('exiting from subworkflow %s')
msg %= session._(forentity.current_workflow.name)
session.transaction_data[(forentity.eid, 'subwfentrytr')] = True
# XXX iirk
req = forentity.req
forentity.req = session.super_session
try:
trinfo = forentity.change_state(tostate, msg, u'text/plain',
tr=wftr)
finally:
forentity.req = req
class SetInitialStateOp(PreCommitOperation):
"""make initial state be a default state"""
def precommit_event(self):
session = self.session
entity = self.entity
# if there is an initial state and the entity's state is not set,
# use the initial state as a default state
pendingeids = session.transaction_data.get('pendingeids', ())
if not entity.eid in pendingeids and not entity.in_state and \
entity.main_workflow:
state = entity.main_workflow.initial
if state:
# use super session to by-pass security checks
session.super_session.add_relation(entity.eid, 'in_state',
state.eid)
def set_initial_state_after_add(session, entity):
SetInitialStateOp(session, entity=entity)
def before_add_in_state(session, eidfrom, rtype, eidto):
"""check state apply, in case of direct in_state change using unsafe_execute
"""
nocheck = session.transaction_data.setdefault('skip-security', set())
if (eidfrom, 'in_state', eidto) in nocheck:
# state changed through TrInfo insertion, so we already know it's ok
return
entity = session.entity_from_eid(eidfrom)
mainwf = entity.main_workflow
if mainwf is None:
msg = session._('entity has no workflow set')
raise ValidationError(entity.eid, {None: msg})
for wf in mainwf.iter_workflows():
if wf.state_by_eid(eidto):
break
else:
msg = session._("state doesn't belong to entity's workflow. You may "
"want to set a custom workflow for this entity first.")
raise ValidationError(eidfrom, {'in_state': msg})
if entity.current_workflow and wf.eid != entity.current_workflow.eid:
msg = session._("state doesn't belong to entity's current workflow")
raise ValidationError(eidfrom, {'in_state': msg})
class CheckTrExitPoint(PreCommitOperation):
def precommit_event(self):
tr = self.session.entity_from_eid(self.treid)
outputs = set()
for ep in tr.subworkflow_exit:
if ep.subwf_state.eid in outputs:
msg = self.session._("can't have multiple exits on the same state")
raise ValidationError(self.treid, {'subworkflow_exit': msg})
outputs.add(ep.subwf_state.eid)
def after_add_subworkflow_exit(session, eidfrom, rtype, eidto):
CheckTrExitPoint(session, treid=eidfrom)
class WorkflowChangedOp(PreCommitOperation):
"""fix entity current state when changing its workflow"""
def precommit_event(self):
# notice that enforcement that new workflow apply to the entity's type is
# done by schema rule, no need to check it here
session = self.session
pendingeids = session.transaction_data.get('pendingeids', ())
if self.eid in pendingeids:
return
entity = session.entity_from_eid(self.eid)
# check custom workflow has not been rechanged to another one in the same
# transaction
mainwf = entity.main_workflow
if mainwf.eid == self.wfeid:
deststate = mainwf.initial
if not deststate:
msg = session._('workflow has no initial state')
raise ValidationError(entity.eid, {'custom_workflow': msg})
if mainwf.state_by_eid(entity.current_state.eid):
# nothing to do
return
# if there are no history, simply go to new workflow's initial state
if not entity.workflow_history:
if entity.current_state.eid != deststate.eid:
_change_state(session, entity.eid,
entity.current_state.eid, deststate.eid)
return
msg = session._('workflow changed to "%s"')
msg %= session._(mainwf.name)
session.transaction_data[(entity.eid, 'customwf')] = self.wfeid
entity.change_state(deststate, msg, u'text/plain')
def set_custom_workflow(session, eidfrom, rtype, eidto):
WorkflowChangedOp(session, eid=eidfrom, wfeid=eidto)
def del_custom_workflow(session, eidfrom, rtype, eidto):
entity = session.entity_from_eid(eidfrom)
typewf = entity.cwetype_workflow()
if typewf is not None:
WorkflowChangedOp(session, eid=eidfrom, wfeid=typewf.eid)
def after_del_workflow(session, eid):
# workflow cleanup
session.execute('DELETE State X WHERE NOT X state_of Y')
session.execute('DELETE Transition X WHERE NOT X transition_of Y')
def _register_wf_hooks(hm):
"""register workflow related hooks on the hooks manager"""
if 'in_state' in hm.schema:
hm.register_hook(before_add_trinfo, 'before_add_entity', 'TrInfo')
hm.register_hook(after_add_trinfo, 'after_add_entity', 'TrInfo')
#hm.register_hook(relation_deleted, 'before_delete_relation', 'in_state')
for eschema in hm.schema.entities():
if 'in_state' in eschema.subject_relations():
hm.register_hook(set_initial_state_after_add, 'after_add_entity',
str(eschema))
hm.register_hook(set_custom_workflow, 'after_add_relation', 'custom_workflow')
hm.register_hook(del_custom_workflow, 'after_delete_relation', 'custom_workflow')
hm.register_hook(after_del_workflow, 'after_delete_entity', 'Workflow')
hm.register_hook(before_add_in_state, 'before_add_relation', 'in_state')
hm.register_hook(after_add_subworkflow_exit, 'after_add_relation', 'subworkflow_exit')
# CWProperty hooks #############################################################
class DelCWPropertyOp(Operation):
"""a user's custom properties has been deleted"""
def commit_event(self):
"""the observed connections pool has been commited"""
try:
del self.epropdict[self.key]
except KeyError:
self.error('%s has no associated value', self.key)
class ChangeCWPropertyOp(Operation):
"""a user's custom properties has been added/changed"""
def commit_event(self):
"""the observed connections pool has been commited"""
self.epropdict[self.key] = self.value
class AddCWPropertyOp(Operation):
"""a user's custom properties has been added/changed"""
def commit_event(self):
"""the observed connections pool has been commited"""
eprop = self.eprop
if not eprop.for_user:
self.repo.vreg.eprop_values[eprop.pkey] = eprop.value
# if for_user is set, update is handled by a ChangeCWPropertyOp operation
def after_add_eproperty(session, entity):
key, value = entity.pkey, entity.value
try:
value = session.vreg.typed_value(key, value)
except UnknownProperty:
raise ValidationError(entity.eid, {'pkey': session._('unknown property key')})
except ValueError, ex:
raise ValidationError(entity.eid, {'value': session._(str(ex))})
if not session.user.matching_groups('managers'):
session.add_relation(entity.eid, 'for_user', session.user.eid)
else:
AddCWPropertyOp(session, eprop=entity)
def after_update_eproperty(session, entity):
if not ('pkey' in entity.edited_attributes or
'value' in entity.edited_attributes):
return
key, value = entity.pkey, entity.value
try:
value = session.vreg.typed_value(key, value)
except UnknownProperty:
return
except ValueError, ex:
raise ValidationError(entity.eid, {'value': session._(str(ex))})
if entity.for_user:
for session_ in get_user_sessions(session.repo, entity.for_user[0].eid):
ChangeCWPropertyOp(session, epropdict=session_.user.properties,
key=key, value=value)
else:
# site wide properties
ChangeCWPropertyOp(session, epropdict=session.vreg.eprop_values,
key=key, value=value)
def before_del_eproperty(session, eid):
for eidfrom, rtype, eidto in session.transaction_data.get('pendingrelations', ()):
if rtype == 'for_user' and eidfrom == eid:
# if for_user was set, delete has already been handled
break
else:
key = session.execute('Any K WHERE P eid %(x)s, P pkey K',
{'x': eid}, 'x')[0][0]
DelCWPropertyOp(session, epropdict=session.vreg.eprop_values, key=key)
def after_add_for_user(session, fromeid, rtype, toeid):
if not session.describe(fromeid)[0] == 'CWProperty':
return
key, value = session.execute('Any K,V WHERE P eid %(x)s,P pkey K,P value V',
{'x': fromeid}, 'x')[0]
if session.vreg.property_info(key)['sitewide']:
raise ValidationError(fromeid,
{'for_user': session._("site-wide property can't be set for user")})
for session_ in get_user_sessions(session.repo, toeid):
ChangeCWPropertyOp(session, epropdict=session_.user.properties,
key=key, value=value)
def before_del_for_user(session, fromeid, rtype, toeid):
key = session.execute('Any K WHERE P eid %(x)s, P pkey K',
{'x': fromeid}, 'x')[0][0]
relation_deleted(session, fromeid, rtype, toeid)
for session_ in get_user_sessions(session.repo, toeid):
DelCWPropertyOp(session, epropdict=session_.user.properties, key=key)
def _register_eproperty_hooks(hm):
"""register workflow related hooks on the hooks manager"""
hm.register_hook(after_add_eproperty, 'after_add_entity', 'CWProperty')
hm.register_hook(after_update_eproperty, 'after_update_entity', 'CWProperty')
hm.register_hook(before_del_eproperty, 'before_delete_entity', 'CWProperty')
hm.register_hook(after_add_for_user, 'after_add_relation', 'for_user')
hm.register_hook(before_del_for_user, 'before_delete_relation', 'for_user')