Moved fallback functions from Db to gen.utils

svn: r13877

src/gen/utils/fallback.py

@@ -0,0 +1,65 @@
+#
+# Gramps - a GTK+/GNOME based genealogy program
+#
+# Copyright (C) 2000-2007  Donald N. Allingham
+#
+# 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
+#
+
+# $Id$
+
+"""
+Functional database interface for getting events, or fallback events.
+"""
+
+def get_birth_or_fallback(db, person):
+    """
+    Get BIRTH event from a person, or fallback to an event around
+    the time of birth.
+    """
+    birth_ref = person.get_birth_ref()
+    if birth_ref:   # regular birth found
+        event = db.get_event_from_handle(birth_ref.ref)
+        if event:
+            return event
+    # now search the event list for fallbacks
+    for event_ref in person.get_primary_event_ref_list():
+        if event_ref:
+            event = db.get_event_from_handle(event_ref.ref)
+            if (event
+                and event.type.is_birth_fallback()
+                and event_ref.role.is_primary()):
+                return event
+    return None    
+    
+def get_death_or_fallback(db, person):
+    """
+    Get a DEATH event from a person, or fallback to an
+    event around the time of death.
+    """
+    death_ref = person.get_death_ref()
+    if death_ref:   # regular death found
+        event = db.get_event_from_handle(death_ref.ref)
+        if event:
+            return event
+    # now search the event list for fallbacks
+    for event_ref in person.get_primary_event_ref_list():
+        if event_ref:
+            event = db.get_event_from_handle(event_ref.ref)
+            if (event
+                and event.type.is_death_fallback()
+                and event_ref.role.is_primary()):
+                return event
+    return None