Add function to get message sender ID

diff --git a/common.php b/common.php
index 7967015..f633c70 100644 (file)
--- a/common.php
+++ b/common.php
@@ -24,7 +24,11 @@ function notEmpty($value) {
 }
 
 function getMessageSender($update) {
-    return PARTICIPANT_IDS[$update->get('message')->get('from')->get('id')];
+    return PARTICIPANT_IDS[getMessageSenderId($update)];
+}
+
+function getMessageSenderId($update) {
+    return $update->get('message')->get('from')->get('id');
 }
 
 function getMessageSenderDisplayName($update) {