Alarm: Add support for Predicates as notification targets.

And specifically, Domains (more portal types may be added to the relation
string field widget as needed).
Predicates get expanded to the list of documents they match.

backport of nexedi/erp5@7a708aab

Note: I had to change this commit a bit, it did not apply because our
erp5 is a bit old.

/reviewed-on https://lab.nexedi.com/nexedi/erp5-capago/merge_requests/29

product/ERP5/Document/Alarm.py

@@ -28,6 +28,7 @@
 ##############################################################################
 
 from compiler.consts import CO_VARKEYWORDS
+from Acquisition import aq_base
 from DateTime import DateTime
 from AccessControl import ClassSecurityInfo, Unauthorized
 from AccessControl.SecurityManagement import getSecurityManager, \
@@ -300,10 +301,21 @@ class Alarm(XMLObject, PeriodicityMixin):
     else:
       prefix = 'INFO'
 
-    notification_tool = getToolByName(self, 'portal_notifications')
-    candidate_list = self.getDestinationValueList()
-    if not candidate_list:
-      candidate_list = None
+    portal = self.getPortalObject()
+    notification_tool = portal.portal_notifications
+    candidate_list = []
+    domain_type_set = ('Domain Generator', 'Domain')
+    for candidate_value in self.getDestinationValueList():
+      if candidate_value.getPortalType() in domain_type_set:
+        test = candidate_value.test
+        for recipient in portal.portal_catalog(
+          query=candidate_value.asQuery(),
+        ):
+          recipient_value = recipient.getObject()
+          if test(recipient_value):
+            candidate_list.append(recipient_value)
+      else:
+        candidate_list.append(candidate_value)
     result_list = [x for x in active_process.getResultList() if x is not None]
     attachment_list = []
     if len(result_list):

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/Alarm_viewNotification/my_destination_title_list.xml

@@ -511,6 +511,10 @@
                           <string>Person</string>
                           <string>Person</string>
                         </tuple>
+                        <tuple>
+                          <string>Domain</string>
+                          <string>Domain</string>
+                        </tuple>
                       </list>
                     </value>
                 </item>