First cut at a rules processor, separate from the disposition of rule hits.

The basic idea is that we process rules on a mlist, message, metadata triplet
making a list of all rules that hit.  Then a different part of the system will
decide on the disposition of a message based on which rules hit and their
priority.

The doctest and plugin architecture is in place, including the tie-in to
setup.py.  Ported the first rule -- emergency.py -- to the new rule
processor.

We no longer need SQLAlchemy as a requirement, and the setuptools/bzr plugin
name has changed.

1 files changed, 35 insertions, 0 deletions

diff --git a/Mailman/app/rules.py b/Mailman/app/rules.py
new file mode 100644
index 000000000..3e83eb60c
--- /dev/null
+++ b/Mailman/app/rules.py
@@ -0,0 +1,35 @@
+# Copyright (C) 2007 by the Free Software Foundation, Inc.
+#
+# 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.
+
+"""Process all rules defined by entry points."""
+
+from Mailman.app.plugins import get_plugins
+
+
+
+def process(mlist, msg, msgdata):
+    """Default rule processing plugin.
+
+    :param msg: The message object.
+    :param msgdata: The message metadata.
+    :return: A set of rule names that matched.
+    """
+    rule_hits = set()
+    for processor_class in get_plugins('mailman.rules'):
+        processor = processor_class()
+        rule_hits |= processor.process(mlist, msg, msgdata)
+    return rule_hits