Subscription.py 38.8 KB
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##############################################################################
#
# Copyright (c) 2002 Nexedi SARL and Contributors. All Rights Reserved.
#          Sebastien Robin <seb@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.
#
##############################################################################

from Globals import PersistentMapping
from time import gmtime,strftime # for anchors
from SyncCode import SyncCode
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from AccessControl import ClassSecurityInfo
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from Products.CMFCore.utils import getToolByName
from Acquisition import Implicit, aq_base
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from Products.ERP5Type.Core.Folder import Folder
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from Products.ERP5Type.Base import Base
from Products.ERP5Type import Permissions
from Products.ERP5Type import PropertySheet
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from DateTime import DateTime
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from zLOG import LOG

import md5

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try:
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    from base64 import b64encode, b64decode, b16encode, b16decode
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except ImportError:
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    from base64 import encodestring as b64encode, decodestring as b64decode, \
        encodestring as b16encode, decodestring as b16decode
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#class Conflict(SyncCode, Implicit):
class Conflict(SyncCode, Base):
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  """
    object_path : the path of the obect
    keyword : an identifier of the conflict
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    publisher_value : the value that we have locally
    subscriber_value : the value sent by the remote box
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  """
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  isIndexable = 0
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  isPortalContent = 0 # Make sure RAD generated accessors at the class level
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  def __init__(self, object_path=None, keyword=None, xupdate=None, 
      publisher_value=None, subscriber_value=None, subscriber=None):
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    self.object_path=object_path
    self.keyword = keyword
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    self.setLocalValue(publisher_value)
    self.setRemoteValue(subscriber_value)
    self.subscriber = subscriber
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    self.resetXupdate()
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    self.copy_path = None
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  def getObjectPath(self):
    """
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    get the object path
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    """
    return self.object_path

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  def getPublisherValue(self):
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    """
    get the domain
    """
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    return self.publisher_value
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  def getXupdateList(self):
    """
    get the xupdate wich gave an error
    """
    xupdate_list = []
    if len(self.xupdate)>0:
      for xupdate in self.xupdate:
        xupdate_list+= [xupdate]
    return xupdate_list

  def resetXupdate(self):
    """
    Reset the xupdate list
    """
    self.xupdate = PersistentMapping()

  def setXupdate(self, xupdate):
    """
    set the xupdate
    """
    if xupdate == None:
      self.resetXupdate()
    else:
      self.xupdate = self.getXupdateList() + [xupdate]

  def setXupdateList(self, xupdate):
    """
    set the xupdate
    """
    self.xupdate = xupdate

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  def setLocalValue(self, value):
    """
    get the domain
    """
    try:
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      self.publisher_value = value
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    except TypeError: # It happens when we try to store StringIO
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      self.publisher_value = None
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  def getSubscriberValue(self):
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    """
    get the domain
    """
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    return self.subscriber_value
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  def setRemoteValue(self, value):
    """
    get the domain
    """
    try:
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      self.subscriber_value = value
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    except TypeError: # It happens when we try to store StringIO
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      self.subscriber_value = None
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  def applyPublisherValue(self):
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    """
      after a conflict resolution, we have decided
      to keep the local version of this object
    """
    p_sync = getToolByName(self,'portal_synchronizations')
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    p_sync.applyPublisherValue(self)
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  def applyPublisherDocument(self):
    """
      after a conflict resolution, we have decided
      to keep the local version of this object
    """
    p_sync = getToolByName(self,'portal_synchronizations')
    p_sync.applyPublisherDocument(self)

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  def getPublisherDocument(self):
    """
      after a conflict resolution, we have decided
      to keep the local version of this object
    """
    p_sync = getToolByName(self,'portal_synchronizations')
    return p_sync.getPublisherDocument(self)

  def getPublisherDocumentPath(self):
    """
      after a conflict resolution, we have decided
      to keep the local version of this object
    """
    p_sync = getToolByName(self,'portal_synchronizations')
    return p_sync.getPublisherDocumentPath(self)

  def getSubscriberDocument(self):
    """
      after a conflict resolution, we have decided
      to keep the local version of this object
    """
    p_sync = getToolByName(self,'portal_synchronizations')
    return p_sync.getSubscriberDocument(self)

  def getSubscriberDocumentPath(self):
    """
      after a conflict resolution, we have decided
      to keep the local version of this object
    """
    p_sync = getToolByName(self,'portal_synchronizations')
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    return p_sync.getSubscriberDocumentPath(self)
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  def applySubscriberDocument(self):
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    """
      after a conflict resolution, we have decided
      to keep the local version of this object
    """
    p_sync = getToolByName(self,'portal_synchronizations')
    p_sync.applySubscriberDocument(self)

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  def applySubscriberValue(self,object=None):
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    """
    get the domain
    """
    p_sync = getToolByName(self,'portal_synchronizations')
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    p_sync.applySubscriberValue(self,object=object)
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  def setSubscriber(self, subscriber):
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    """
    set the domain
    """
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    self.subscriber = subscriber
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  def getSubscriber(self):
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    """
    get the domain
    """
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    return self.subscriber
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  def getKeyword(self):
    """
    get the domain
    """
    return self.keyword

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  def getPropertyId(self):
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    """
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    get the property id
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    """
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    return self.keyword
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  def getCopyPath(self):
    """
    Get the path of the copy, or None if none has been made
    """
    copy_path = self.copy_path
    return copy_path
    
  def setCopyPath(self, path):
    """
    """
    self.copy_path = path
    
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class Signature(Folder,SyncCode):
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  """
    status -- SENT, CONFLICT...
    md5_object -- An MD5 value of a given document
    #uid -- The UID of the document
    id -- the ID of the document
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    gid -- the global id of the document
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    rid -- the uid of the document on the remote database,
        only needed on the server.
    xml -- the xml of the object at the time where it was synchronized
  """
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  isIndexable = 0
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  isPortalContent = 0 # Make sure RAD generated accessors at the class level
  
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  # Constructor
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  def __init__(self, id=None, rid=None, status=None, xml_string=None, 
      object=None):
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    if object is not None:
      self.setPath(object.getPhysicalPath())
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      self.setObjectId(object.getId())
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    else:
      self.setPath(None)
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    self.setId(id)
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    self.setGid(id)
    self.setRid(rid)
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    self.status = status
    self.setXML(xml_string)
    self.partial_xml = None
    self.action = None
    self.setTempXML(None)
    self.resetConflictList()
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    self.md5_string = None
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    self.force = 0
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    self.setSubscriberXupdate(None)
    self.setPublisherXupdate(None)
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    Folder.__init__(self,id)
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  def setStatus(self, status):
    """
      set the Status (see SyncCode for numbers)
    """
    self.status = status
    if status == self.SYNCHRONIZED:
      temp_xml = self.getTempXML()
      self.setForce(0)
      if temp_xml is not None:
        # This happens when we have sent the xml
        # and we just get the confirmation
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        self.setXML(temp_xml)
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      self.setTempXML(None)
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      self.setPartialXML(None)
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      self.setSubscriberXupdate(None)
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      self.setPublisherXupdate(None)
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      if len(self.getConflictList())>0:
        self.resetConflictList()
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      # XXX This may be a problem, if the document is changed
      # during a synchronization
      self.setLastSynchronizationDate(DateTime())
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      self.getParentValue().removeRemainingObjectPath(self.getPath())
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    if status == self.NOT_SYNCHRONIZED:
      self.setTempXML(None)
      self.setPartialXML(None)
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    elif status in (self.PUB_CONFLICT_MERGE,self.SENT):
      # We have a solution for the conflict, don't need to keep the list
      self.resetConflictList()
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  def getStatus(self):
    """
      get the Status (see SyncCode for numbers)
    """
    return self.status

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  def getPath(self):
    """
      get the force value (if we need to force update or not)
    """
    return getattr(self,'path',None)

  def setPath(self, path):
    """
      set the force value (if we need to force update or not)
    """
    self.path = path

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  def getForce(self):
    """
      get the force value (if we need to force update or not)
    """
    return self.force

  def setForce(self, force):
    """
      set the force value (if we need to force update or not)
    """
    self.force = force

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  def getLastModificationDate(self):
    """
      get the last modfication date, so that we don't always
      check the xml
    """
    return getattr(self,'modification_date',None)

  def setLastModificationDate(self,value):
    """
      set the last modfication date, so that we don't always
      check the xml
    """
    setattr(self,'modification_date',value)

  def getLastSynchronizationDate(self):
    """
      get the last modfication date, so that we don't always
      check the xml
    """
    return getattr(self,'synchronization_date',None)

  def setLastSynchronizationDate(self,value):
    """
      set the last modfication date, so that we don't always
      check the xml
    """
    setattr(self,'synchronization_date',value)

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  def setXML(self, xml):
    """
      set the XML corresponding to the object
    """
    self.xml = xml
    if self.xml != None:
      self.setTempXML(None) # We make sure that the xml will not be erased
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      self.setMD5(xml)
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  def getXML(self):
    """
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      get the XML corresponding to the object
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    """
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    xml =  getattr(self,'xml',None)
    if xml == '':
      xml = None
    return xml
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  def setTempXML(self, xml):
    """
      This is the xml temporarily saved, it will
      be stored with setXML when we will receive
      the confirmation of synchronization
    """
    self.temp_xml = xml

  def getTempXML(self):
    """
      get the temp xml
    """
    return self.temp_xml

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  def setSubscriberXupdate(self, xupdate):
    """
    set the full temp xupdate
    """
    self.subscriber_xupdate = xupdate

  def getSubscriberXupdate(self):
    """
    get the full temp xupdate
    """
    return self.subscriber_xupdate

  def setPublisherXupdate(self, xupdate):
    """
    set the full temp xupdate
    """
    self.publisher_xupdate = xupdate

  def getPublisherXupdate(self):
    """
    get the full temp xupdate
    """
    return self.publisher_xupdate

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  def setMD5(self, xml):
    """
      set the MD5 object of this signature
    """
    self.md5_string = md5.new(xml).digest()

  def getMD5(self):
    """
      get the MD5 object of this signature
    """
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    return self.md5_string
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  def checkMD5(self, xml_string):
    """
    check if the given md5_object returns the same things as
    the one stored in this signature, this is very usefull
    if we want to know if an objects has changed or not
    Returns 1 if MD5 are equals, else it returns 0
    """
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    return ((md5.new(xml_string).digest()) == self.getMD5())
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  def setRid(self, rid):
    """
      set the rid
    """
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    if rid is type(u'a'): 
      rid = rid.encode('utf-8')
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    self.rid = rid

  def getRid(self):
    """
      get the rid
    """
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    return getattr(self, 'rid', None)
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  def setId(self, id):
    """
      set the id
    """
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    if id is type(u'a'): 
      id = id.encode('utf-8')
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    self.id = id

  def getId(self):
    """
      get the id
    """
    return self.id

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  def setGid(self, gid):
    """
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      set the gid
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    """
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    if gid is type(u'a'): 
      gid = gid.encode('utf-8')
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    self.gid = gid

  def getGid(self):
    """
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      get the gid
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    """
    return self.gid

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  def setObjectId(self, id):
    """
      set the id of the object associated to this signature
    """
    if id is type(u'a'): 
      id = id.encode('utf-8')
    self.object_id = id

  def getObjectId(self):
    """
      get the id of the object associated to this signature
    """
    return getattr(self, 'object_id', None)

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  def setPartialXML(self, xml):
    """
    Set the partial string we will have to
    deliver in the future
    """
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    if type(xml) is type(u'a'):
      xml = xml.encode('utf-8')
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    self.partial_xml = xml

  def getPartialXML(self):
    """
    Set the partial string we will have to
    deliver in the future
    """
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    #LOG('Subscriber.getPartialXML',0,'partial_xml: %s' % str(self.partial_xml))
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    if self.partial_xml is not None:
      self.partial_xml = self.partial_xml.replace('@-@@-@','--') # need to put back '--'
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    return self.partial_xml

  def getAction(self):
    """
    Return the actual action for a partial synchronization
    """
    return self.action

  def setAction(self, action):
    """
    Return the actual action for a partial synchronization
    """
    self.action = action

  def getConflictList(self):
    """
    Return the actual action for a partial synchronization
    """
    conflict_list = []
    if len(self.conflict_list)>0:
      for conflict in self.conflict_list:
        conflict_list += [conflict]
    return conflict_list

  def resetConflictList(self):
    """
    Return the actual action for a partial synchronization
    """
    self.conflict_list = PersistentMapping()

  def setConflictList(self, conflict_list):
    """
    Return the actual action for a partial synchronization
    """
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    # LOG('setConflictList, list',0,conflict_list)
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    if conflict_list is None or conflict_list==[]:
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      self.resetConflictList()
    else:
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      self.conflict_list = conflict_list

  def delConflict(self, conflict):
    """
    Return the actual action for a partial synchronization
    """
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    # LOG('delConflict, conflict',0,conflict)
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    conflict_list = []
    for c in self.getConflictList():
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      #LOG('delConflict, c==conflict',0,c==aq_base(conflict))
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      if c != aq_base(conflict):
        conflict_list += [c]
    if conflict_list != []:
      self.setConflictList(conflict_list)
    else:
      self.resetConflictList()
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  def getObject(self):
    """
    Returns the object corresponding to this signature
    """
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    return self.getParentValue().getObjectFromGid(self.getObjectId())
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  def checkSynchronizationNeeded(self, object):
    """
    We will look at date, if there is no changes, no need to syncrhonize
    """
    last_modification = DateTime(object.ModificationDate())
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    # LOG('checkSynchronizationNeeded object.ModificationDate()',0,object.ModificationDate())
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    last_synchronization = self.getLastSynchronizationDate()
    parent = object.aq_parent
    # XXX CPS Specific
    if parent.id == 'portal_repository': # Make sure there is no sub objects
    #if 1:
      if last_synchronization is not None and last_modification is not None \
        and self.getSubscriberXupdate() is None and self.getPublisherXupdate() is None and \
        self.getStatus()==self.NOT_SYNCHRONIZED:
        if last_synchronization > last_modification:
        #if 1:
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          # LOG('checkSynchronizationNeeded, no modification on: ',0,object.id)
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          self.setStatus(self.SYNCHRONIZED)
    

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def addSubscription( self, id, title='', REQUEST=None ):
    """
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    Add a new Subscribption
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    """
    o = Subscription( id ,'','','','','','')
    self._setObject( id, o )
    if REQUEST is not None:
        return self.manage_main(self, REQUEST, update_menu=1)
    return o

#class Subscription(SyncCode, Implicit):
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#class Subscription(Folder, SyncCode, Implicit, Folder, Impli):
class Subscription(Folder, SyncCode):
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  """
    Subscription hold the definition of a master ODB
    from/to which a selection of objects will be synchronised

    Subscription defined by::

    publication_url -- a URI to a publication

    subsribtion_url -- URL of ourselves

    destination_path -- the place where objects are stored

    query   -- a query which defines a local set of documents which
           are going to be synchronised

    xml_mapping -- a PageTemplate to map documents to XML

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    gpg_key -- the name of a gpg key to use

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    Subscription also holds private data to manage
    the synchronisation. We choose to keep an MD5 value for
    all documents which belong to the synchronisation process::

    signatures -- a dictionnary which contains the signature
           of documents at the time they were synchronized

    session_id -- it defines the id of the session
         with the server.

    last_anchor - it defines the id of the last synchronisation

    next_anchor - it defines the id of the current synchronisation

  """

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  meta_type='ERP5 Subscription'
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  portal_type='SyncML Subscription' # may be useful in the future...
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  isPortalContent = 1
  isRADContent = 1
  icon = None
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  isIndexable = 0
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  user = None
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  # Declarative properties
  property_sheets = ( PropertySheet.Base
                    , PropertySheet.SimpleItem )

  allowed_types = ( 'Signatures',)

  # Declarative constructors
  constructors =   (addSubscription,)

  # Declarative security
  security = ClassSecurityInfo()
  security.declareProtected(Permissions.ManagePortal,
                            'manage_editProperties',
                            'manage_changeProperties',
                            'manage_propertiesForm',
                              )
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  # Constructor
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  def __init__(self, id, title, publication_url, subscription_url, 
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      destination_path, source_uri, target_uri, query, xml_mapping, 
      conduit, gpg_key, id_generator, gid_generator, media_type, login, 
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      password, activity_enabled, alert_code):
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    """
      We need to create a dictionnary of
      signatures of documents which belong to the synchronisation
      process
    """
    self.id = id
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    self.setAlertCode(alert_code)
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    self.setActivityEnabled(activity_enabled)
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    self.publication_url = (publication_url)
    self.subscription_url = str(subscription_url)
    self.destination_path = str(destination_path)
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    self.setSourceURI(source_uri)
    self.setTargetURI(target_uri)
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    self.setQuery(query)
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    self.setXMLMapping(xml_mapping)
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    self.anchor = None
    self.session_id = 0
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    #self.signatures = PersistentMapping()
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    self.last_anchor = '00000000T000000Z'
    self.next_anchor = '00000000T000000Z'
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    self.setMediaType(media_type)
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    self.login = login
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    self.password=password
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    self.domain_type = self.SUB
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    self.gpg_key = gpg_key
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    self.setGidGenerator(gid_generator)
    self.setSynchronizationIdGenerator(id_generator)
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    self.setConduit(conduit)
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    Folder.__init__(self, id)
    self.title = title
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    #self.signatures = PersitentMapping()

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  def getAlertCodeList(self):
    #XXX replace by a dictionary or a list in SyncCode
    return [self.TWO_WAY, self.ONE_WAY_FROM_SERVER]

  def getAlertCode(self):
    return getattr(self, 'alert_code', 200)

  def setAlertCode(self, value):
    self.alert_code = int(value)

  def isOneWayFromServer(self):
    return self.getDomainType() == self.SUB and self.getAlertCode() == self.ONE_WAY_FROM_SERVER

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  def getActivityEnabled(self):
    """
    return true if we are using activity, false otherwise
    """
    return getattr(self, 'activity_enabled', None)

  def setActivityEnabled(self, activity_enabled):
    """
    set if we are using activity or not
    """
    self.activity_enabled = activity_enabled

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  def getTitle(self):
    """
    getter for title
    """
    return getattr(self,'title',None)

  def setTitle(self, value):
    """
    setter for title
    """
    self.title = value
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  def setSourceURI(self, value):
    """
    setter for source_uri
    """
    self.source_uri = value

  def getSourceURI(self):
    """
    getter for the source_uri (the local path of the subscription)
    """
    return getattr(self, 'source_uri', None)

  def setTargetURI(self, value):
    """
    setter for target_uri
    """
    self.target_uri = value
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  def getTargetURI(self):
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    """
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    getter for the target_uri (the distant Publication we want to synchronize 
    with)
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    """
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    return getattr(self, 'target_uri', None)
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  def getSynchronizationType(self, default=None):
    """
    """
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    # XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
    # XXX for debugging only, to be removed
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    #dict_sign = {}
    #for o in self.objectValues():
      #dict_sign[o.getId()] = o.getStatus()
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    # LOG('getSignature',0,'signatures_status: %s' % str(dict_sign))
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    # XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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    code = self.SLOW_SYNC
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    if len(self.objectValues()) > 0:
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      code = self.getAlertCode()
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    if default is not None:
      code = default
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    #LOG('Subscription',0,'getSynchronizationType: %s' % code)
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    return code

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  def setXMLMapping(self, value):
    """
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    this the name of the method used in order to set the xml
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    """
    if value == '':
      value = None
    self.xml_mapping = value

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  def checkCorrectRemoteSessionId(self, session_id):
    """
    We will see if the last session id was the same
    wich means that the same message was sent again

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    return True if the session id was not seen, False if already seen
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    """
    last_session_id = getattr(self,'last_session_id',None)
    if last_session_id == session_id:
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      return False 
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    self.last_session_id = session_id
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    return True
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  def checkCorrectRemoteMessageId(self, message_id):
    """
    We will see if the last message id was the same
    wich means that the same message was sent again

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    return True if the message id was not seen, False if already seen
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    """
    last_message_id = getattr(self,'last_message_id',None)
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    # LOG('checkCorrectRemoteMessageId  last_message_id =',0,last_message_id)
    # LOG('checkCorrectRemoteMessageId  message_id =',0,message_id)
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    if last_message_id == message_id:
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      return False
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    self.last_message_id = message_id
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    return True
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  def initLastMessageId(self, last_message_id=0):
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    """
    set the last message id to 0
    """
    self.last_message_id=last_message_id
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  def getLastSentMessage(self):
    """
    This is the getter for the last message we have sent
    """
    return getattr(self,'last_sent_message','')

  def setLastSentMessage(self,xml):
    """
    This is the setter for the last message we have sent
    """
    self.last_sent_message = xml

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  def getDomainType(self):
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    """
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      return the ID
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    """
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    return self.domain_type
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  def getId(self):
    """
      return the ID
    """
    return self.id

  def setId(self, id):
    """
      set the ID
    """
    self.id = id

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  def setConduit(self, value):
    """
      set the Conduit
    """
    self.conduit = value

  def getConduit(self):
    """
      get the Conduit

    """
    return getattr(self,'conduit',None)

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  def getQuery(self):
    """
      return the query
    """
    return self.query

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  def getGPGKey(self):
    """
      return the gnupg key name
    """
    return getattr(self,'gpg_key','')

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  def setGPGKey(self, value):
    """
      setter for the gnupg key name
    """
    self.gpg_key = value

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  def setQuery(self, query):
    """
      set the query
    """
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    if query == '':
      query = None
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    self.query = query

  def getPublicationUrl(self):
    """
      return the publication url
    """
    return self.publication_url

  def getLocalUrl(self):
    """
      return the publication url
    """
    return self.publication_url

  def setPublicationUrl(self, publication_url):
    """
      return the publication url
    """
    self.publication_url = publication_url

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  def getXMLMapping(self, force=0):
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    """
      return the xml mapping
    """
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    if self.isOneWayFromServer() and force == 0:
      return None
    xml_mapping = getattr(self, 'xml_mapping', None)
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    return xml_mapping
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  def getXMLFromObject(self, object):
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    """
      return the xml mapping
    """
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    xml_mapping = self.getXMLMapping()
    xml = ''
    if xml_mapping is not None:
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      func = getattr(object, xml_mapping, None)
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      if func is not None:
        xml = func()
    return xml
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  def setGidGenerator(self, method):
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    """
    This set the method name wich allows to find a gid
    from any object
    """
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    if method in (None, '', 'None'):
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      method = 'getId'
    self.gid_generator = method
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  def getGidGenerator(self):
    """
    This get the method name wich allows to find a gid
    from any object
    """
    return self.gid_generator

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  def getMediaType(self):
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    """
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    This method return the type of media used in this session,
    for example, it could be "text/vcard" or "xml/text",...
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    """
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    return getattr(self, 'media_type', self.MEDIA_TYPE['TEXT_XML'])
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  def setMediaType(self, media_type):
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    """
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    set the type of media used
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    """
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    if media_type in (None,''):
      media_type = self.MEDIA_TYPE['TEXT_XML']
    self.media_type = media_type
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  def getLogin(self):
    """
    This method return the login of this subscription
    """
    return getattr(self, 'login', '')

  def setLogin(self, new_login):
    """
    set the login at new_login
    """
    self.login=new_login

  def getPassword(self):
    """
    This method return the password of this subscription
    """
    return getattr(self, 'password', '')

  def setPassword(self, new_password):
    """
    set the password at new_password
    """
    self.password=new_password
  

  def setAuthentication(self, auth):
    """
      set the value of the authentication requirement
    """
    self.auth_required = auth

  def getAuthenticationFormat(self):
    """
      return the format of authentication
    """
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    return getattr(self, 'authentication_format', 'b64')
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  def getAuthenticationType(self):
    """
      return the type of authentication
    """
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    return getattr(self, 'authentication_type', 'syncml:auth-basic')
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  def setAuthenticationFormat(self, authentication_format):
    """
      set the format of authentication
    """
    self.authentication_format = authentication_format

  def setAuthenticationType(self, authentication_type):
    """
      set the type of authentication
    """
    self.authentication_type = authentication_type

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  def getGidFromObject(self, object):
    """
    """
    o_base = aq_base(object)
    o_gid = None
    gid_gen = self.getGidGenerator()
    if callable(gid_gen):
      o_gid=gid_gen(object)
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    elif getattr(o_base, gid_gen, None) is not None:
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      generator = getattr(object, gid_gen)
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      o_gid = generator() # XXX - used to be o_gid = generator(object=object) which is redundant
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    elif gid_gen is not None:
      # It might be a script python
      generator = getattr(object,gid_gen)
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      o_gid = generator() # XXX - used to be o_gid = generator(object=object) which is redundant
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    o_gid = b16encode(o_gid)
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    return o_gid

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  def getObjectFromGid(self, gid):
    """
    This tries to get the object with the given gid
    This uses the query if it exist
    """
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    signature = self.getSignatureFromGid(gid)
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    # First look if we do already have the mapping between
    # the id and the gid
    destination = self.getDestination()
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    if signature is not None and signature.getPath() is not None:
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      o = None
      try:
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        o = destination.getPortalObject().restrictedTraverse(signature.getPath())
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      except (AttributeError, KeyError, TypeError):
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        pass
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      o_id = signature.getObjectId()
      #try with id param too, because gid is not catalogged
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      object_list = self.getObjectList(gid = b16decode(gid), id = o_id)
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      #LOG('getObjectFromGid :',0,'object_list=%s, gid=%s, o_id=%s' % (object_list, gid, o_id))
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      if o is not None and o in object_list:
        return o
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    #LOG('entering in the slow loop of getObjectFromGid !!!',0,'')
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    object_list = self.getObjectList(gid = b16decode(gid))
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    #LOG('getObjectFromGid :', 0, 'object_list slow loop=%s, gid=%s' % (object_list, gid))
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    for o in object_list:
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      o_gid = self.getGidFromObject(o)
      if o_gid == gid:
        return o
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    #LOG('getObjectFromGid',0,'returning None')
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    return None

  def getObjectFromId(self, id):
    """
    return the object corresponding to the id
    """
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    object_list = self.getObjectList(id=id)
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    o = None
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    for object in object_list:
      if object.getId() == id:
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        o = object
        break
    return o
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#  def setOneWaySyncFromServer(self,value):
#    """
#    If this option is enabled, then we will not 
#    send our own modifications
#    """
#    self.one_way_sync_from_server = value
#


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  def getObjectList(self, **kw):
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    """
    This returns the list of sub-object corresponding
    to the query
    """
    destination = self.getDestination()
    query = self.getQuery()
    query_list = []
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    if query is not None and isinstance(query, str):
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      query_method = getattr(destination,query,None)
      if query_method is not None:
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        query_list = query_method(**kw)
    elif callable(query): # used in the test
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      query_list = query(destination)
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    return [x for x in query_list
              if not getattr(x,'_conflict_resolution',False)]
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  def generateNewIdWithGenerator(self, object=None,gid=None):
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    """
    This tries to generate a new Id
    """
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    id_generator = self.getSynchronizationIdGenerator()
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    if id_generator is not None:
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      o_base = aq_base(object)
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      new_id = None
      if callable(id_generator):
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        new_id = id_generator(object,gid=gid)
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      elif getattr(o_base, id_generator, None) is not None:
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        generator = getattr(object, id_generator)
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        new_id = generator()
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      else: 
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        # This is probably a python script
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        generator = getattr(object, id_generator)
        new_id = generator(object=object,gid=gid)
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      #LOG('generateNewId, new_id: ',0,new_id)
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      return new_id
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    return None

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  def setSynchronizationIdGenerator(self, method):
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    """
    This set the method name wich allows to generate
    a new id
    """
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    if method in ('','None'):
      method = None
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    self.synchronization_id_generator = method
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  def getSynchronizationIdGenerator(self):
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    """
    This get the method name wich allows to generate a new id
    """
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    return getattr(self, 'synchronization_id_generator', None)
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  def getSubscriptionUrl(self):
    """
      return the subscription url
    """
    return self.subscription_url

  def setSubscriptionUrl(self, subscription_url):
    """
      set the subscription url
    """
    self.subscription_url = subscription_url

  def getDestinationPath(self):
    """
      return the destination path
    """
    return self.destination_path

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  def getDestination(self):
    """
      return the destination object itself
    """
    return self.unrestrictedTraverse(self.getDestinationPath())

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  def setDestinationPath(self, destination_path):
    """
      set the destination path
    """
    self.destination_path = destination_path

  def getSubscription(self):
    """
      return the current subscription
    """
    return self
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  def setSessionId(self, session_id):
    """
      set the session id
    """
    self.session_id = session_id
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  def getSessionId(self):
    """
      return the session id
    """
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    #self.session_id += 1 #to be commented
    return self.session_id

  def incrementSessionId(self):
    """
      increment and return the session id
    """
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    self.session_id += 1
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    self.resetMessageId() # for a new session, the message Id must be reset
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    return self.session_id

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  def incrementMessageId(self):
    """
      return the message id
    """
    #self.message_id += 1
    #return self.message_id
    #return 5
    value = getattr(self, 'message_id', 0)
    self.message_id = value +1
    return self.message_id

  def getMessageId(self):
    """
      increment and return the message id
    """
    return self.message_id

  def resetMessageId(self):
    """
      set the message id to 0
    """
    self.message_id = 0
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  def setMessageId(self, message_id):
    """
      set the message id to message_id
    """
    self.message_id = message_id
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  def getLastAnchor(self):
    """
      return the id of the last synchronisation
    """
    return self.last_anchor

  def getNextAnchor(self):
    """
      return the id of the current synchronisation
    """
    return self.next_anchor

  def setLastAnchor(self, last_anchor):
    """
      set the value last anchor
    """
    self.last_anchor = last_anchor

  def setNextAnchor(self, next_anchor):
    """
      set the value next anchor
    """
    # We store the old next anchor as the new last one
    self.last_anchor = self.next_anchor
    self.next_anchor = next_anchor

  def NewAnchor(self):
    """
      set a new anchor
    """
    self.last_anchor = self.next_anchor
    self.next_anchor = strftime("%Y%m%dT%H%M%SZ", gmtime())

  def resetAnchors(self):
    """
      reset both last and next anchors
    """
    self.last_anchor = self.NULL_ANCHOR
    self.next_anchor = self.NULL_ANCHOR

  def addSignature(self, signature):
    """
      add a Signature to the subscription
    """
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    if self.getSignatureFromGid(signature.getGid()) != None:
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      self.delSignature(signature.getGid())
    self._setObject(signature.getGid(), aq_base(signature))
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  def delSignature(self, gid):
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    """
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      del a Signature of the subscription
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    """
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    #del self.signatures[gid]
    self._delObject(gid)
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  def getSignatureFromObjectId(self, id):
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    """
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    return the signature corresponding to the gid
    """
    o = None
    # XXX very slow
    for signature in self.getSignatureList():
      if id == signature.getObjectId():
        o = signature
        break
    return o

  def getSignatureFromGid(self, gid):
    """
    return the signature corresponding to the gid
    """
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    return getattr(self, gid, None)
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  def getSignatureFromRid(self, rid):
    """
    return the signature corresponding to the rid
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    """
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    o = None
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    # XXX very slow
    for signature in self.getSignatureList():
      if rid == signature.getRid():
        o = signature
        break
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    return o
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  def getObjectIdList(self):
    """
    Returns the list of gids from signature
    """
    object_id_list = []
    for signature in self.getSignatureList():
      if signature.getObjectId() is not None:
        object_id_list.append(signature.getObjectId())
    return object_id_list

  def getGidList(self):
    """
    Returns the list of gids from signature
    """
    gid_list = []
    for signature in self.getSignatureList():
      if signature.getGid() is not None:
        gid_list.append(signature.getGid())
    return gid_list

  def getRidList(self):
    """
    Returns the list of rids from signature
    """
    rid_list = []
    for signature in self.getSignatureList():
      if signature.getRid() is not None:
        rid_list.append(signature.getRid())
    return rid_list

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  def getSignatureList(self):
    """
      add a Signature to the subscription
    """
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    return self.objectValues()
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  def hasSignature(self, gid):
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    """
      Check if there's a signature with this uid
    """
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    #return self.signatures.has_key(gid)
    return gid in self.objectIds()
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  def resetAllSignatures(self):
    """
      Reset all signatures
    """
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    while len(self.objectIds())>0:
      for id in self.objectIds():
        self._delObject(id)
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  def getConflictList(self):
    """
    Return the list of all conflicts from all signatures
    """
    conflict_list = []
    for signature in self.getSignatureList():
      conflict_list += signature.getConflictList()
    return conflict_list

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  def getRemainingObjectPathList(self):
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    """
    We should now wich objects should still
    synchronize
    """
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    return getattr(self,'remaining_object_path_list',None)
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  def setRemainingObjectPathList(self, value):
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    """
    We should now wich objects should still
    synchronize
    """
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    setattr(self,'remaining_object_path_list',value)
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  def removeRemainingObjectPath(self, object_path):
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    """
    We should now wich objects should still
    synchronize
    """
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    remaining_object_list = self.getRemainingObjectPathList()
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    if remaining_object_list is not None:
      new_list = []
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      new_list.extend(remaining_object_list)
      while object_path in new_list:
        new_list.remove(object_path)
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      self.setRemainingObjectPathList(new_list)
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  def startSynchronization(self):
    """
    Set the status of every object as NOT_SYNCHRONIZED
    """
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    for o in self.objectValues():
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      # Change the status only if we are not in a conflict mode
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      if not(o.getStatus() in (self.CONFLICT,self.PUB_CONFLICT_MERGE,
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                                                        self.PUB_CONFLICT_CLIENT_WIN)):
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        o.setStatus(self.NOT_SYNCHRONIZED)
        o.setPartialXML(None)
        o.setTempXML(None)
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    self.setRemainingObjectPathList(None)
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  def isAuthenticated(self):
    """
    return True if the subscriber is authenticated for this session, False 
    in other case
    """
    return self.is_authenticated
    
  def setAuthenticated(self, value):
    """
      set at True or False the value of is_authenticated is the subscriber
      is authenticated for this session or not
    """
    self.is_authenticated = value

  def encode(self, format, string_to_encode):
    """
      return the string_to_encode encoded with format format
    """
    if format in ('', None):
      return string_to_encode
    if format == 'b64':
      return b64encode(string_to_encode)
    #elif format is .... put here the other formats
    else:#if there is no format corresponding with format, raise an error
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      #LOG('encode : unknown or not implemented format :', 0, format)
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      raise ValueError, "Sorry, the server ask for the format %s but it's unknow or not implemented" % format
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  def decode(self, format, string_to_decode):
    """
      return the string_to_decode decoded with format format
    """
    string_to_decode = string_to_decode.encode('utf-8')
    if format in ('', None):
      return string_to_decode
    if format == 'b64':
      return b64decode(string_to_decode)
    #elif format is .... put here the other formats
    else:#if there is no format corresponding with format, raise an error
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      #LOG('decode : unknown or not implemented format :', 0, format)
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      raise ValueError, "Sorry, the format %s is unknow or not implemented" % format

  def isDecodeEncodeTheSame(self, string_encoded, string_decoded, format):
    """
      return True if the string_encoded is equal to string_decoded encoded 
      in format
    """
    isTheSame=False
    if self.encode(format, string_decoded) == string_encoded:
      isTheSame=True
    return isTheSame


  def setUser(self, user):
    """
      save the user logged in to log him on each transaction
    """
    self.user=user

  def getUser(self):
    """
      retrun the user logged in
    """
    return self.user