############################################################################## # # Copyright (c) 2002 Nexedi SARL and Contributors. All Rights Reserved. # Jean-Paul Smets-Solanes <jp@nexedi.com> # # WARNING: This program as such is intended to be used by professional # programmers who take the whole responsability of assessing all potential # consequences resulting from its eventual inadequacies and bugs # End users who are looking for a ready-to-use solution with commercial # garantees and support are strongly adviced to contract a Free Software # Service Company # # This program is Free Software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program 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 General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # ############################################################################## import zope.interface from AccessControl import ClassSecurityInfo from Products.CMFCore.utils import getToolByName from Products.ERP5Type import Permissions, PropertySheet, Constraint, interfaces from Products.ERP5Type.XMLObject import XMLObject from Products.ERP5.Document.Predicate import Predicate from Acquisition import aq_base, aq_parent, aq_inner, aq_acquire from zLOG import LOG, WARNING class Rule(Predicate, XMLObject): """ Rule objects implement the simulation algorithm (expand, solve) Example of rules - Stock rule (checks stocks) - Order rule (copies movements from an order) - Capacity rule (makes sure stocks / sources are possible) - Transformation rule (expands transformations) - Template rule (creates submovements with a template system) used in Invoice rule, Paysheet rule, etc. Rules are called one by one at the global level (the rules folder) and at the local level (applied rules in the simulation folder) The simulation_tool includes rules which are parametrized by the sysadmin The simulation_tool does the logics of checking, calling, etc. simulation_tool is a subclass of Folder & Tool """ # CMF Type Definition meta_type = 'ERP5 Rule' portal_type = 'Rule' add_permission = Permissions.AddPortalContent isPortalContent = 1 isRADContent = 1 isPredicate = 1 # Declarative security security = ClassSecurityInfo() security.declareObjectProtected(Permissions.AccessContentsInformation) zope.interface.implements( interfaces.IPredicate, interfaces.IRule ) # Default Properties property_sheets = ( PropertySheet.Base , PropertySheet.XMLObject , PropertySheet.CategoryCore , PropertySheet.DublinCore , PropertySheet.Task , PropertySheet.Predicate , PropertySheet.Reference , PropertySheet.Version , PropertySheet.Rule ) # Portal Type of created children movement_type = 'Simulation Movement' security.declareProtected(Permissions.AccessContentsInformation, 'isAccountable') def isAccountable(self, movement): """Tells wether generated movement needs to be accounted or not. Only account movements which are not associated to a delivery; Whenever delivery is there, delivery has priority """ return movement.getDeliveryValue() is None security.declareProtected(Permissions.ModifyPortalContent, 'constructNewAppliedRule') def constructNewAppliedRule(self, context, id=None, activate_kw=None, **kw): """ Creates a new applied rule which points to self """ # XXX Parameter **kw is useless, so, we should remove it portal_types = getToolByName(self, 'portal_types') if id is None: id = context.generateNewId() if getattr(aq_base(context), id, None) is None: context.newContent(id=id, portal_type='Applied Rule', specialise_value=self, activate_kw=activate_kw) return context.get(id) # Simulation workflow def test(self, *args, **kw): """ If no test method is defined, return False, to prevent infinite loop """ if not self.getTestMethodId(): return False return Predicate.test(self, *args, **kw) security.declareProtected(Permissions.ModifyPortalContent, 'expand') def expand(self, applied_rule, **kw): """ Expands the current movement downward. An applied rule can be expanded only if its parent movement is expanded. """ for o in applied_rule.objectValues(): o.expand(**kw) security.declareProtected(Permissions.ModifyPortalContent, 'solve') def solve(self, applied_rule, solution_list): """ Solve inconsistency according to a certain number of solutions templates. This updates the -> new status -> solved This applies a solution to an applied rule. Once the solution is applied, the parent movement is checked. If it does not diverge, the rule is reexpanded. If not, diverge is called on the parent movement. """ security.declareProtected(Permissions.ModifyPortalContent, 'diverge') def diverge(self, applied_rule): """ -> new status -> diverged This basically sets the rule to "diverged" and blocks expansion process """ pass # Solvers security.declareProtected( Permissions.AccessContentsInformation, 'isDivergent') def isDivergent(self, sim_mvt, ignore_list=[]): """ Returns true if the Simulation Movement is divergent comparing to the delivery value """ delivery = sim_mvt.getDeliveryValue() if delivery is None: return 0 if self.getDivergenceList(sim_mvt) == []: return 0 else: return 1 security.declareProtected(Permissions.View, 'getDivergenceList') def getDivergenceList(self, sim_mvt): """ Return a list of messages that contains the divergences. """ result_list = [] for divergence_tester in self.contentValues( portal_type=self.getPortalDivergenceTesterTypeList()): result = divergence_tester.explain(sim_mvt) result_list.extend(result) return result_list # XXX getSolverList is not part of the API and should be removed. # Use getDivergenceList instead. # security.declareProtected(Permissions.View, 'getSolverList') # def getSolverList(self, applied_rule): # """ # Returns a list Divergence solvers # """ # Deliverability / orderability def isOrderable(self, movement): return 0 def isDeliverable(self, movement): return 0 def isStable(self, applied_rule, **kw): """ - generate a list of previsions - compare the prevision with existing children - return 1 if they match, 0 else """ list = self._getCompensatedMovementList(applied_rule, **kw) for e in list: if len(e) > 0: return 0 return 1 #### Helpers def _getCurrentMovementList(self, applied_rule, **kw): """ Returns the list of current children of the applied rule, sorted in 3 groups : immutables/mutables/deletable If a movement is not frozen, and has no delivered child, it can be deleted. Else, if a movement is not frozen, and has some delivered child, it can be modified. Else, it cannot be modified. - is delivered - has delivered childs (including self) - is in reserved or current state - is frozen a movement is deletable if it has no delivered child, is not in current state, and not in delivery movements. a movement """ immutable_movement_list = [] mutable_movement_list = [] deletable_movement_list = [] for movement in applied_rule.contentValues(portal_type=self.movement_type): if movement.isFrozen(): immutable_movement_list.append(movement) else: if movement._isTreeDelivered(): mutable_movement_list.append(movement) else: deletable_movement_list.append(movement) return (immutable_movement_list, mutable_movement_list, deletable_movement_list) def _getCompensatedMovementList(self, applied_rule, matching_property_list=( 'resource', 'variation_category_list', 'variation_property_dict',), **kw): """ Compute the difference between prevision and existing movements immutable movements need compensation, mutables needs to be modified XXX For now, this implementation is too simple. It could be improved by using MovementGroups """ add_list = [] # list of movements to be added modify_dict = {} # dict of movements to be modified delete_list = [] # list of movements to be deleted prevision_list = self._generatePrevisionList(applied_rule, **kw) immutable_movement_list, mutable_movement_list, \ deletable_movement_list = self._getCurrentMovementList(applied_rule, **kw) movement_list = immutable_movement_list + mutable_movement_list \ + deletable_movement_list non_matched_list = movement_list[:] # list of remaining movements for prevision in prevision_list: p_matched_list = [] for movement in non_matched_list: for prop in matching_property_list: if prevision.get(prop) != movement.getProperty(prop): break else: p_matched_list.append(movement) # XXX hardcoded ... # LOG("Rule, _getCompensatedMovementList", WARNING, # "Hardcoded properties check") # Movements exist, we'll try to make them match the prevision if p_matched_list != []: # Check the quantity m_quantity = 0.0 for movement in p_matched_list: m_quantity += movement.getQuantity()#getCorrectedQuantity() if m_quantity != prevision.get('quantity'): q_diff = prevision.get('quantity') - m_quantity # try to find a movement that can be edited for movement in p_matched_list: if movement in (mutable_movement_list \ + deletable_movement_list): # mark as requiring modification prop_dict = modify_dict.setdefault(movement.getId(), {}) #prop_dict['quantity'] = movement.getCorrectedQuantity() + \ prop_dict['quantity'] = movement.getQuantity() + \ q_diff break # no modifiable movement was found, need to create one else: prevision['quantity'] = q_diff add_list.append(prevision) # Check the date for movement in p_matched_list: if movement in (mutable_movement_list \ + deletable_movement_list): prop_dict = modify_dict.setdefault(movement.getId(), {}) for prop in ('start_date', 'stop_date'): #XXX should be >= 15 if prevision.get(prop) != movement.getProperty(prop): prop_dict[prop] = prevision.get(prop) break for k, v in prevision.items(): if k not in ('quantity', 'start_date', 'stop_date') and\ v != movement.getProperty(k): prop_dict.setdefault(k, v) # update movement lists for movement in p_matched_list: non_matched_list.remove(movement) # No movement matched, we need to create one else: add_list.append(prevision) # delete non matched movements for movement in non_matched_list: if movement in deletable_movement_list: # delete movement delete_list.append(movement.getId()) elif movement in mutable_movement_list: # set movement quantity to 0 to make it "void" prop_dict = modify_dict.setdefault(movement.getId(), {}) prop_dict['quantity'] = 0.0 else: # movement not modifiable, we can decide to create a compensation # with negative quantity raise NotImplementedError( "Can not create a compensation movement for %s" % \ movement.getRelativeUrl()) return (add_list, modify_dict, delete_list)