Merge pull request fedora-infra#44 from fedora-infra/feature/fas-grou…

…p-member-rule

Add a rule to match members of a FAS group.

fmn/rules/generic.py

@@ -54,6 +54,29 @@ def not_user_filter(config, message, fasnick=None, *args, **kw):
     return valid
 
 
+def _get_users_of_group(config, group):
+    """ Utility to query fas for users of a group. """
+    if not group:
+        return set()
+    fas = fmn.rules.utils.get_fas(config)
+    return fmn.rules.utils.get_user_of_group(config, fas, group)
+
+
+@hint(callable=_get_users_of_group)
+def fas_group_member_filter(config, message, group=None, *args, **kw):
+    """ Messages regarding any member of a FAS group
+
+    Use this rule to include messages that have anything to do with **any
+    user** belonging to a particular fas group.  You might want to use this
+    to monitor the activity of a group for which you are responsible.
+    """
+    if not group:
+        return False
+    fasusers = _get_users_of_group(config, group)
+    msgusers = fedmsg.meta.msg2usernames(message, **config)
+    return bool(fasusers.intersection(msgusers))
+
+
 def _user_package_filter_hint(config, fasnick):
     packages = fmn.rules.utils.get_packages_of_user(config, fasnick)
     return dict(packages=packages)