extend collective.contentrules.mail 0.4 / plone 3.1

configure.zcml

<configure
    xmlns="http://namespaces.zope.org/zope"
    xmlns:five="http://namespaces.zope.org/five"
    xmlns:browser="http://namespaces.zope.org/browser"
    i18n_domain="mysite.site">


  <include package="z3c.unconfigure" file="meta.zcml" />
  <unconfigure>
    <adapter factory="collective.contentrules.mail.adapter.MailReplacer" />
  </unconfigure>

  <!-- note: the adapter one is required -->
  <adapter factory=".mail.MailReplacerExtended"
       provides=".mail.IMailReplacerExtended"
  	   />

  <unconfigure>
  <utility
    component="collective.contentrules.mail.model.DefaultMailModel"
    name="collective.contentrules.mail.model.base"
    />
  </unconfigure>
  <utility
    component=".mail.ExtendedMailModel"
    name="collective.contentrules.mail.model.base"
    />

</configure>

mail.py

from zope.schema import TextLine, Object, List, Tuple

from zope.interface import implements
from zope.component import adapts
from zope.schema import getFieldsInOrder

from collective.contentrules.mail.model import MailModel
from collective.contentrules.mail.interfaces import IMailModel
from collective.contentrules.mail.interfaces import IMailReplacer
from collective.contentrules.mail.adapter import MailReplacer
from Products.CMFCore.utils import getToolByName
from Products.CMFCore.interfaces import IDublinCore

from mysite.site import siteMessageFactory as _

class IMailReplacerExtended(IMailReplacer):

    foo = TextLine(title=_(u"foo of content",))


class MailReplacerExtended(MailReplacer):
    """Provides attributes which can be used in a mail model"""

    implements(IMailReplacerExtended)
    adapts(IDublinCore)

    @property
    def foo(self):
        """
        The goal is self.context.getContactEmail()
        """
        #import pdb; pdb.set_trace()
        return "foo called"

# The default mail model, which uses the default mail replacer.
ExtendedMailModel = MailModel(title=_(u"Extended standard model for plone content"),
                             replacer_interface=IMailReplacerExtended)

working(tm) - the model was crucial to setup as well