From 0935f6a7f1fc56917dfe5cab763f1fe18e60ce77 Mon Sep 17 00:00:00 2001
From: m <m@localhost.localdomain>
Date: Thu, 21 Jan 2021 16:20:39 +0100
Subject: [PATCH] catched some errors

---
 app/event_handlers.py | 26 +++++++++++++++++++-------
 app/helpers.py        |  5 ++++-
 2 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/app/event_handlers.py b/app/event_handlers.py
index 366310b..4dd41c7 100644
--- a/app/event_handlers.py
+++ b/app/event_handlers.py
@@ -17,12 +17,21 @@ def keep_user_register(update: Update, context: CallbackContext) -> None:
     message = update.message
     users = set()
     # get user from every possible source
-    if hasattr(update, "effective_user"):               users |= set(update.effective_user)
-    if hasattr(message, "new_chat_members"):            users |= set(*message.new_chat_members)
-    if hasattr(message, "left_chat_member"):            users |= set(message.left_chat_member)
-    if hasattr(message, "forward_from"):                users |= set(message.forward_from)
-    if hasattr(update, "edited_message"):
-        if hasattr(update.edited_message, "from_user"): users |= set(message.edited_message.from_user)
+    try:
+        users |= {update.effective_user}
+    except Exception as e: pass
+    try:
+        users |= {*message.new_chat_members}
+    except Exception as e: pass
+    try:
+        users |= {message.left_chat_member}
+    except Exception as e: pass
+    try:
+        users |= {message.forward_from}
+    except Exception as e: pass
+    try:
+        users |= {message.edited_message.from_user}
+    except Exception as e: pass
     try:
         record = GET_ADMIN_FROM_API_REQUEST_COUNTDOWN
         get_administrators_frequency = 10 # request this data with low frequency
@@ -38,5 +47,8 @@ def keep_user_register(update: Update, context: CallbackContext) -> None:
 
     users.discard(None)
 
-    registered_users: set[User] = context.bot_data[USERS]
+    try:
+        registered_users: set[User] = context.bot_data[USERS]
+    except KeyError: # first use
+        context.bot_data[USERS] = set()
     registered_users |= users
diff --git a/app/helpers.py b/app/helpers.py
index 5b57c9d..079076e 100644
--- a/app/helpers.py
+++ b/app/helpers.py
@@ -82,7 +82,10 @@ def get_users(mentions: PARSED_MESSAGEENTITIES, context, allow_bots=False) -> se
             user = mention.user
         else:
             username = username.lstrip("@")
-            user = list(filter(lambda user: user.username == username, registered_users))[0]
+            try:
+                user = list(filter(lambda user: user.username == username, registered_users))[0]
+            except IndexError: # do not add not registered users
+                continue
         if user and (allow_bots or not user.is_bot):
             users.add(user)