+
−# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+
−# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+
−#
+
−# This file is part of CubicWeb.
+
−#
+
−# CubicWeb is free software: you can redistribute it and/or modify it under the
+
−# terms of the GNU Lesser General Public License as published by the Free
+
−# Software Foundation, either version 2.1 of the License, or (at your option)
+
−# any later version.
+
−#
+
−# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
+
−# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+
−# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+
−# details.
+
−#
+
−# You should have received a copy of the GNU Lesser General Public License along
+
−# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
+
−"""workflow related schemas
+
−
+
−"""
+
−__docformat__ = "restructuredtext en"
+
−_ = unicode
+
−
+
−from yams.buildobjs import (EntityType, RelationType, SubjectRelation,
+
−                            RichString, String, Int)
+
−from cubicweb.schema import RQLConstraint, RQLUniqueConstraint
+
−from cubicweb.schemas import (META_ETYPE_PERMS, META_RTYPE_PERMS,
+
−                              HOOKS_RTYPE_PERMS)
+
−
+
−class Workflow(EntityType):
+
−    __permissions__ = META_ETYPE_PERMS
+
−
+
−    name = String(required=True, indexed=True, internationalizable=True,
+
−                  maxsize=256)
+
−    description = RichString(default_format='text/rest',
+
−                             description=_('semantic description of this workflow'))
+
−
+
−    workflow_of = SubjectRelation('CWEType', cardinality='+*',
+
−                                  description=_('entity types which may use this workflow'),
+
−                                  constraints=[RQLConstraint('O final FALSE')])
+
−
+
−    initial_state = SubjectRelation('State', cardinality='?*',
+
−                                   constraints=[RQLConstraint('O state_of S',
+
−                                                              msg=_('state doesn\'t belong to this workflow'))],
+
−                                   description=_('initial state for this workflow'))
+
−
+
−
+
−class default_workflow(RelationType):
+
−    """default workflow for an entity type"""
+
−    __permissions__ = META_RTYPE_PERMS
+
−
+
−    subject = 'CWEType'
+
−    object = 'Workflow'
+
−    cardinality = '?*'
+
−    constraints = [RQLConstraint('S final FALSE, O workflow_of S',
+
−                                 msg=_('workflow isn\'t a workflow for this type'))]
+
−
+
−
+
−class State(EntityType):
+
−    """used to associate simple states to an entity type and/or to define
+
−    workflows
+
−    """
+
−    __permissions__ = META_ETYPE_PERMS
+
−
+
−    name = String(required=True, indexed=True, internationalizable=True,
+
−                  maxsize=256,
+
−                  constraints=[RQLUniqueConstraint('S name N, S state_of WF, Y state_of WF, Y name N', 'Y',
+
−                                                   _('workflow already have a state of that name'))])
+
−    description = RichString(default_format='text/rest',
+
−                             description=_('semantic description of this state'))
+
−
+
−    # XXX should be on BaseTransition w/ AND/OR selectors when we will
+
−    # implements #345274
+
−    allowed_transition = SubjectRelation('BaseTransition', cardinality='**',
+
−                                         constraints=[RQLConstraint('S state_of WF, O transition_of WF',
+
−                                                                    msg=_('state and transition don\'t belong the the same workflow'))],
+
−                                         description=_('allowed transitions from this state'))
+
−    state_of = SubjectRelation('Workflow', cardinality='1*', composite='object',
+
−                               description=_('workflow to which this state belongs'),
+
−                               constraints=[RQLUniqueConstraint('S name N, Y state_of O, Y name N', 'Y',
+
−                                                                _('workflow already have a state of that name'))])
+
−
+
−
+
−class BaseTransition(EntityType):
+
−    """abstract base class for transitions"""
+
−    __permissions__ = META_ETYPE_PERMS
+
−
+
−    name = String(required=True, indexed=True, internationalizable=True,
+
−                  maxsize=256,
+
−                  constraints=[RQLUniqueConstraint('S name N, S transition_of WF, Y transition_of WF, Y name N', 'Y',
+
−                                                   _('workflow already have a transition of that name'))])
+
−    type = String(vocabulary=(_('normal'), _('auto')), default='normal')
+
−    description = RichString(description=_('semantic description of this transition'))
+
−    condition = SubjectRelation('RQLExpression', cardinality='*?', composite='subject',
+
−                                description=_('a RQL expression which should return some results, '
+
−                                              'else the transition won\'t be available. '
+
−                                              'This query may use X and U variables '
+
−                                              'that will respectivly represents '
+
−                                              'the current entity and the current user'))
+
−
+
−    require_group = SubjectRelation('CWGroup', cardinality='**',
+
−                                    description=_('group in which a user should be to be '
+
−                                                  'allowed to pass this transition'))
+
−    transition_of = SubjectRelation('Workflow', cardinality='1*', composite='object',
+
−                                    description=_('workflow to which this transition belongs'),
+
−                                    constraints=[RQLUniqueConstraint('S name N, Y transition_of O, Y name N', 'Y',
+
−                                                                     _('workflow already have a transition of that name'))])
+
−
+
−
+
−class Transition(BaseTransition):
+
−    """use to define a transition from one or multiple states to a destination
+
−    states in workflow's definitions. Transition without destination state will
+
−    go back to the state from which we arrived to the current state.
+
−    """
+
−    __specializes_schema__ = True
+
−
+
−    destination_state = SubjectRelation(
+
−        'State', cardinality='?*',
+
−        constraints=[RQLConstraint('S transition_of WF, O state_of WF',
+
−                                   msg=_('state and transition don\'t belong the the same workflow'))],
+
−        description=_('destination state for this transition'))
+
−
+
−
+
−class WorkflowTransition(BaseTransition):
+
−    """special transition allowing to go through a sub-workflow"""
+
−    __specializes_schema__ = True
+
−
+
−    subworkflow = SubjectRelation('Workflow', cardinality='1*',
+
−                                  constraints=[RQLConstraint('S transition_of WF, WF workflow_of ET, O workflow_of ET',
+
−                                                             msg=_('subworkflow isn\'t a workflow for the same types as the transition\'s workflow'))]
+
−                                  )
+
−    # XXX use exit_of and inline it
+
−    subworkflow_exit = SubjectRelation('SubWorkflowExitPoint', cardinality='*1',
+
−                                       composite='subject')
+
−
+
−
+
−class SubWorkflowExitPoint(EntityType):
+
−    """define how we get out from a sub-workflow"""
+
−    subworkflow_state = SubjectRelation(
+
−        'State', cardinality='1*',
+
−        constraints=[RQLConstraint('T subworkflow_exit S, T subworkflow WF, O state_of WF',
+
−                                   msg=_('exit state must be a subworkflow state'))],
+
−        description=_('subworkflow state'))
+
−    destination_state = SubjectRelation(
+
−        'State', cardinality='?*',
+
−        constraints=[RQLConstraint('T subworkflow_exit S, T transition_of WF, O state_of WF',
+
−                                   msg=_('destination state must be in the same workflow as our parent transition'))],
+
−        description=_('destination state. No destination state means that transition '
+
−                      'should go back to the state from which we\'ve entered the '
+
−                      'subworkflow.'))
+
−
+
−
+
−class TrInfo(EntityType):
+
−    """workflow history item"""
+
−    # 'add' security actually done by hooks
+
−    __permissions__ = {
+
−        'read':   ('managers', 'users', 'guests',), # XXX U has_read_permission O ?
+
−        'add':    ('managers', 'users', 'guests',),
+
−        'delete': (), # XXX should we allow managers to delete TrInfo?
+
−        'update': ('managers', 'owners',),
+
−    }
+
−    # The unique_together constraint ensures that 2 repositories
+
−    # sharing the db won't be able to fire a transition simultaneously
+
−    # on the same entity tr_count is filled in the FireTransitionHook
+
−    # to the number of TrInfo attached to the entity on which we
+
−    # attempt to fire a transition. In other word, it contains the
+
−    # rank of the TrInfo for that entity, and the constraint says we
+
−    # cannot have 2 TrInfo with the same rank.
+
−    __unique_together__ = [('tr_count', 'wf_info_for')]
+
−    from_state = SubjectRelation('State', cardinality='1*', inlined=True)
+
−    to_state = SubjectRelation('State', cardinality='1*', inlined=True)
+
−    # make by_transition optional because we want to allow managers to set
+
−    # entity into an arbitrary state without having to respect wf transition
+
−    by_transition = SubjectRelation('BaseTransition', cardinality='?*')
+
−    comment = RichString(fulltextindexed=True)
+
−    tr_count = Int(description='autocomputed attribute used to ensure transition coherency')
+
−    # get actor and date time using owned_by and creation_date
+
−
+
−class from_state(RelationType):
+
−    __permissions__ = HOOKS_RTYPE_PERMS.copy()
+
−    inlined = True
+
−
+
−class to_state(RelationType):
+
−    __permissions__ = HOOKS_RTYPE_PERMS.copy()
+
−    inlined = True
+
−
+
−class by_transition(RelationType):
+
−    # 'add' security actually done by hooks
+
−    __permissions__ = {
+
−        'read':   ('managers', 'users', 'guests',),
+
−        'add':    ('managers', 'users', 'guests',),
+
−        'delete': (),
+
−    }
+
−    inlined = True
+
−
+
−
+
−class workflow_of(RelationType):
+
−    """link a workflow to one or more entity type"""
+
−    __permissions__ = META_RTYPE_PERMS
+
−
+
−class state_of(RelationType):
+
−    """link a state to one or more workflow"""
+
−    __permissions__ = META_RTYPE_PERMS
+
−    inlined = True
+
−
+
−class transition_of(RelationType):
+
−    """link a transition to one or more workflow"""
+
−    __permissions__ = META_RTYPE_PERMS
+
−    inlined = True
+
−
+
−class destination_state(RelationType):
+
−    """destination state of a transition"""
+
−    __permissions__ = META_RTYPE_PERMS
+
−    inlined = True
+
−
+
−class allowed_transition(RelationType):
+
−    """allowed transitions from this state"""
+
−    __permissions__ = META_RTYPE_PERMS
+
−
+
−class initial_state(RelationType):
+
−    """indicate which state should be used by default when an entity using
+
−    states is created
+
−    """
+
−    __permissions__ = META_RTYPE_PERMS
+
−    inlined = True
+
−
+
−
+
−class subworkflow(RelationType):
+
−    __permissions__ = META_RTYPE_PERMS
+
−    inlined = True
+
−
+
−class exit_point(RelationType):
+
−    __permissions__ = META_RTYPE_PERMS
+
−
+
−class subworkflow_state(RelationType):
+
−    __permissions__ = META_RTYPE_PERMS
+
−    inlined = True
+
−
+
−
+
−class condition(RelationType):
+
−    __permissions__ = META_RTYPE_PERMS
+
−
+
−# already defined in base.py
+
−# class require_group(RelationType):
+
−#     __permissions__ = META_RTYPE_PERMS
+
−
+
−
+
−# "abstract" relations, set by WorkflowableEntityType ##########################
+
−
+
−class custom_workflow(RelationType):
+
−    """allow to set a specific workflow for an entity"""
+
−    __permissions__ = META_RTYPE_PERMS
+
−
+
−    cardinality = '?*'
+
−    constraints = [RQLConstraint('S is ET, O workflow_of ET',
+
−                                 msg=_('workflow isn\'t a workflow for this type'))]
+
−    object = 'Workflow'
+
−
+
−
+
−class wf_info_for(RelationType):
+
−    """link a transition information to its object"""
+
−    # 'add' security actually done by hooks
+
−    __permissions__ = {
+
−        'read':   ('managers', 'users', 'guests',),
+
−        'add':    ('managers', 'users', 'guests',),
+
−        'delete': (),
+
−    }
+
−    inlined = True
+
−
+
−    cardinality = '1*'
+
−    composite = 'object'
+
−    fulltext_container = composite
+
−    subject = 'TrInfo'
+
−
+
−
+
−class in_state(RelationType):
+
−    """indicate the current state of an entity"""
+
−    __permissions__ = HOOKS_RTYPE_PERMS
+
−
+
−    # not inlined intentionnaly since when using ldap sources, user'state
+
−    # has to be stored outside the CWUser table
+
−    inlined = False
+
−
+
−    cardinality = '1*'
+
−    constraints = [RQLConstraint('S is ET, O state_of WF, WF workflow_of ET',
+
−                                 msg=_('state doesn\'t apply to this entity\'s type'))]
+
−    object = 'State'