# -*- coding: utf-8 -*- ############################################################################## # # Copyright (c) 2008-2009 Nexedi SA 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 responsibility 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 # guarantees 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 Products.ERP5Type import interfaces from DeliverySolver import DeliverySolver class FIFO(DeliverySolver): """ The FIFO solver reduces deliveted quantity by reducing the quantity of simulation movements from the last order. """ # Declarative interfaces zope.interface.implements(interfaces.IDeliverySolver) title = 'FIFO Solver' # IDeliverySolver Implementation def __init__(self, simulation_movement_list): """ Move this to mixin """ self.simulation_movement_list = simulation_movement_list def getTotalQuantity(self): """ Move this to mixin """ total_quantity = 0 for movement in self.simulation_movement_list: total_quantity += movement.getQuantity() return total_quantity def setTotalQuantity(self, new_quantity): """ """ result = [] simulation_movement_list = self._getSimulationMovementList() remaining_quantity = self.getTotalQuantity() - new_quantity for movement in simulation_movement_list: if remaining_quantity: quantity = movement.getQuantity() if quantity < remaining_quantity: result.append((movement, quantity)) remaining_quantity -= quantity movement.setQuantity(0) else: result.append((movement, remaining_quantity)) movement.setQuantity(quantity - remaining_quantity) remaining_quantity = 0 # Return movement, split_quantity tuples for movement in simulation_movement_list: movement.setDeliveryRatio(movement.getQuantity() / new_quantity) return result def _getSimulationMovementList(self): """ Returns a list of simulation movement sorted from the last order. """ simulation_movement_list = self.simulation_movement_list if len(simulation_movement_list) > 1: return sorted(simulation_movement_list, key=lambda x:x.getExplainationValue().getStartDate(), reverse=True) else: return simulation_movement_list