[Zope3-checkins] SVN: messageboard/trunk/step01/ Changed preconditions and constraints to be described by two new

[Stephan Richter]

Log message for revision 26980:
  Changed preconditions and constraints to be described by two new 
  interfaces.
  


Changed:
  U   messageboard/trunk/step01/configure.zcml
  U   messageboard/trunk/step01/interfaces.py
  U   messageboard/trunk/step01/message.py


-=-
Modified: messageboard/trunk/step01/configure.zcml
===================================================================
--- messageboard/trunk/step01/configure.zcml	2004-08-10 20:05:11 UTC (rev 26979)
+++ messageboard/trunk/step01/configure.zcml	2004-08-10 21:14:43 UTC (rev 26980)
@@ -45,6 +45,10 @@
         />
     <require
         permission="zope.ManageContent"
+        interface=".interfaces.IMessageContainer"
+        />
+    <require
+        permission="zope.ManageContent"
         set_schema=".interfaces.IMessage"
         />
   </content>

Modified: messageboard/trunk/step01/interfaces.py
===================================================================
--- messageboard/trunk/step01/interfaces.py	2004-08-10 20:05:11 UTC (rev 26979)
+++ messageboard/trunk/step01/interfaces.py	2004-08-10 21:14:43 UTC (rev 26980)
@@ -17,20 +17,19 @@
 
 $Id$
 """
+
+from zope.interface import Interface
 from zope.schema import Text, TextLine, Field
 
 from zope.app.container.constraints import ContainerTypesConstraint
 from zope.app.container.constraints import ItemTypePrecondition
-from zope.app.container.interfaces import IContainer
+from zope.app.container.interfaces import IContained, IContainer
 from zope.app.file.interfaces import IFile
 
 
-class IMessage(IContainer):
-    """A message object. It can contain its own responses."""
+class IMessage(Interface):
+    """A message object."""
 
-    def __setitem__(name, object):
-        """Add a IMessage object."""
-
     title = TextLine(
         title=u"Title/Subject",
         description=u"Title and/or subject of the message.",
@@ -60,7 +59,18 @@
         required=False)
 
 
-IMessage['__setitem__'].setTaggedValue('precondition',
-                                       ItemTypePrecondition(IMessage, IFile))
-IMessage.setTaggedValue('__parent__', Field(
-    constraint=ContainerTypesConstraint(IMessageBoard, IMessage)))
+class IMessageContained(IContained):
+    """Interface that specifies the type of objects that can contain
+    messages."""
+    __parent__ = Field(
+        constraint = ContainerTypesConstraint(IMessageBoard, IMessage))
+
+
+class IMessageContainer(IContainer):
+    """We also want to make the message object a container that can contain
+    responses (other messages) and attachments (files and images)."""
+
+    def __setitem__(name, object):
+        """Add a IMessage object."""
+
+    __setitem__.precondition = ItemTypePrecondition(IMessage, IFile)

Modified: messageboard/trunk/step01/message.py
===================================================================
--- messageboard/trunk/step01/message.py	2004-08-10 20:05:11 UTC (rev 26979)
+++ messageboard/trunk/step01/message.py	2004-08-10 21:14:43 UTC (rev 26980)
@@ -21,6 +21,7 @@
 from zope.app.container.btree import BTreeContainer
 
 from book.messageboard.interfaces import IMessage
+from book.messageboard.interfaces import IMessageContained, IMessageContainer
 
 class Message(BTreeContainer):
     """A simple implementation of a message.
@@ -45,7 +46,7 @@
     >>> message.body
     u'Message Body'
     """
-    implements(IMessage)
+    implements(IMessage, IMessageContained, IMessageContainer)
 
     # See book.messageboard.interfaces.IMessage
     title = u''