X-Git-Url: https://scm.cri.ensmp.fr/git/Plinn.git/blobdiff_plain/3c4367d8e03450e9a73e61f4247145d2b6c86a33..959d888c17d1403d2eeecc19bc4b5e2c8d1debf6:/Products/Plinn/ContentHistory.py

diff --git a/Products/Plinn/ContentHistory.py b/Products/Plinn/ContentHistory.py
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--- /dev/null
+++ b/Products/Plinn/ContentHistory.py
@@ -0,0 +1,106 @@
+# -*- coding: utf-8 -*-
+#######################################################################################
+#   Plinn - http://plinn.org                                                          #
+#   Copyright © 2005-2009  Benoît PIN <benoit.pin@ensmp.fr>                           #
+#                                                                                     #
+#   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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.   #
+#######################################################################################
+"""
+Module to manage history of contents (comparisons, copy to present).
+
+
+
+"""
+
+from Globals import InitializeClass
+from AccessControl import ClassSecurityInfo
+from ExtensionClass import Base
+import Acquisition
+from zope.interface import implements
+from OFS.History import historicalRevision
+from Products.PluginIndexes.common import safe_callable
+from interfaces import IContentHistory
+from Products.CMFCore.permissions import ModifyPortalContent
+from permissions import ViewHistory
+from struct import pack, unpack
+from DateTime import DateTime
+
+class ContentHistory(Base, Acquisition.Implicit) :
+	""" Utility to manage historical entries of a content
+	"""
+	implements(IContentHistory)
+	security = ClassSecurityInfo()
+	
+	def __init__(self, content) :
+		self._content = content
+	
+	security.declareProtected(ViewHistory, 'listEntries')
+	def listEntries(self, first=0, last=20):
+		oid = self._content._p_oid
+		db = self._content._p_jar.db()
+		r = db.history(oid, size=last)
+
+		if r is None:
+			# storage doesn't support history
+			return ()
+
+		r=r[first:]
+
+		for d in r:
+			d['time']=DateTime(d['time'])
+			d['key']='.'.join(map(str, unpack(">HHHH", d['tid'])))
+
+		return r
+	
+	security.declareProtected(ViewHistory, 'getHistoricalRevisionByKey')
+	def getHistoricalRevisionByKey(self, key, withContext=False):
+
+		serial = apply(pack, ('>HHHH',) + tuple(map(int, key.split('.'))))
+		content = self._content
+		rev = historicalRevision(content, serial)
+		rev = rev.__of__(content.aq_parent)
+		if withContext is False :
+			return rev, DateTime(rev._p_mtime)
+		else :
+			ctx = {}
+			if isinstance(withContext, int) :
+				first = max(withContext-1, 0)
+				entries = self.listEntries(first=first, last=withContext+2)
+			
+			if len(entries) == 3 :
+				ctx['next'], ctx['current'], ctx['previous'] = entries
+			elif len(entries) == 2 :
+				serials = [e['tid'] for e in entries]
+				i =  serials.index(serial)
+				if i == 0 :
+					# last (newest) transaction
+					ctx['current'], ctx['previous'] = entries
+				else :
+					ctx['next'], ctx['current'] = entries
+			elif len(entries) == 1 :
+				ctx['current'] = entries[0]
+			return rev, ctx
+				
+	
+	security.declareProtected(ViewHistory, 'compare')
+	def compare(self, leftkey, rightkey):
+		raise NotImplementedError
+	
+	
+	security.declareProtected(ModifyPortalContent, 'restore')
+	def restore(self, key):
+		raise NotImplementedError
+	
+InitializeClass(ContentHistory)
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