From 2b8faa735aaa744fbb7e68b546822d951eadcafb Mon Sep 17 00:00:00 2001
From: Daniel Winzen <d@winzen4.de>
Date: Sat, 30 Jul 2016 16:45:01 +0200
Subject: [PATCH] Prevent posting the same message twice, if no other message
was posted in-between
---
CHANGELOG | 1 +
chat.php | 12 +++++++++---
2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/CHANGELOG b/CHANGELOG
index fa27d68..5574a97 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,7 @@
Don't display empty option for system messages in delete messages by name
Don't show a kick button on your own session in the list of active sessions
Allow ignoring incognito chatters
+Prevent posting the same message twice, if no other message was posted in-between
Version 1.20.6 - Jul. 23, 2016
Simplify ignore logic + disallow ignoring chatters with higher status
diff --git a/chat.php b/chat.php
index bc33406..2bbb7b7 100644
--- a/chat.php
+++ b/chat.php
@@ -2911,11 +2911,11 @@ function create_hotlinks(){
}
function add_message(){
- global $U;
+ global $U, $db;
if(empty($U['message'])){
return false;
}
- $newmessage=array(
+ $message=array(
'postdate' =>time(),
'poststatus' =>$U['poststatus'],
'poster' =>$U['nickname'],
@@ -2923,7 +2923,13 @@ function add_message(){
'text' =>"<span class=\"usermsg\">$U[displaysend]".style_this($U['message'], $U['style']).'</span>',
'delstatus' =>$U['status']
);
- write_message($newmessage);
+ //prevent posting the same message twice, if no other message was posted in-between.
+ $stmt=$db->prepare('SELECT id FROM ' . PREFIX . 'messages WHERE poststatus=? AND poster=? AND recipient=? AND text=? AND id IN (SELECT * FROM (SELECT id FROM ' . PREFIX . 'messages ORDER BY id DESC LIMIT 1) AS t);');
+ $stmt->execute([$message['poststatus'], $message['poster'], $message['recipient'], $message['text']]);
+ if($stmt->fetch(PDO::FETCH_NUM)){
+ return false;
+ }
+ write_message($message);
return true;
}