Add an API to filter user directory searches by MXID or display name.

.gitignore

@@ -69,3 +69,6 @@ typings/
 
 # next.js build output
 .next
+
+# Python packing directories.
+mjolnir.egg-info/

synapse_antispam/mjolnir/antispam.py

@@ -115,6 +115,11 @@ class AntiSpam(object):
     def user_may_publish_room(self, user_id, room_id):
         return True  # allowed
 
+    def check_for_banned_user(self, user_id, display_name):
+        # Check whether the user ID or display name matches any of the banned
+        # patterns.
+        return self.is_user_banned(user_id) or self.is_user_banned(display_name)
+
     @staticmethod
     def parse_config(config):
         return config  # no parsing needed