##############################################################################
#
# Copyright (c) 2010 Nexedi SA and Contributors. All Rights Reserved.
#
# WARNING: This program as such is intended to be used by professional
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# Service Company
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# This program is Free Software; you can redistribute it and/or
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##############################################################################

from AccessControl import ClassSecurityInfo
from Products.ERP5Type import Permissions
from Products.ERP5Legacy.Document.Rule import Rule

class DeliverySimulationRule(Rule):
  """
  Delivery Simulation Rule expand simulation created by a order root
  simulation rule or delivery root simulation rule.
  """

  # CMF Type Definition
  meta_type = 'ERP5 Delivery Simulation Rule'
  portal_type = 'Delivery Simulation Rule'
  add_permission = Permissions.AddPortalContent

  # Declarative security
  security = ClassSecurityInfo()
  security.declareObjectProtected(Permissions.AccessContentsInformation)

  security.declareProtected(Permissions.ModifyPortalContent, 'expand')
  def expand(self, applied_rule, force=0, **kw):
    """
    Expands the rule:
    - generate a list of previsions
    - compare the prevision with existing children
      - get the list of existing movements (immutable, mutable, deletable)
      - compute the difference between prevision and existing (add,
        modify, remove)
    - add/modify/remove child movements to match prevision
    """
    return Rule._expand(self, applied_rule, force=force, **kw)

  def isDeliverable(self, movement):
    return movement.getResource() is not None
