new plugin: comment_joins

plugins/muc_online.py

@@ -1,4 +1,6 @@
 import logging
+import time
+import random
 
 import config
 from common import (
@@ -36,3 +38,39 @@ def send_record(**args):
         config.runtimeconf_persist()
 
         return response
+
+
+@pluginfunction('comment_joins', 'comments frequent joins', ptypes_MUC_ONLINE)
+@config_locked
+def comment_joins(**args):
+    # max elapsed time between the latest and the N latest join
+    timespan  = 120
+    max_joins = 6
+
+    comment_joins_strings = [
+        "%s: please consider to fix your internet connection"
+    ]
+
+    current_timestamp = int(time.time())
+
+    arg_user = args['reply_user']
+    arg_user_key = arg_user.lower()
+
+    if arg_user_key not in config.runtime_config_store['user_joins']:
+        config.runtime_config_store['user_joins'][arg_user_key] = [ current_timestamp ]
+        config.runtimeconf_persist()
+        return None
+
+    user_joins = config.runtime_config_store['user_joins'][arg_user_key]
+
+    user_joins = [
+        ts if current_timestamp - int(ts) <= timespan else [] for ts in user_joins
+    ]
+    user_joins.append(current_timestamp)
+
+    if len(user_joins) >= max_joins:
+        config.runtime_config_store['user_joins'].pop(arg_user_key)
+        config.runtimeconf_persist()
+        return { 'msg':  random.choice(comment_joins_strings) % arg_user }
+    else:
+        config.runtimeconf_persist()