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Verify UUID and don't update time when perdiod too short #7

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Verify UUID and don't update time when perdiod too short #7

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662390b
verify UUID prior to registration
areynard13 Jan 9, 2026
5232dfe
refactor: don't update time when period too short
areynard13 Jan 9, 2026
dd7c7bf
Verify UUID on the online function
areynard13 Jan 14, 2026
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22 changes: 22 additions & 0 deletions src/bot.php
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,12 @@ class PimOnlineBot
*/
private $base_url;

/**
* Minimum interval in seconds before updating the database for an online host.
* @var int
*/
const MIN_UPDATE_INTERVAL = 30;

/**
* Init a PimOnlineBot
*/
Expand Down Expand Up @@ -71,6 +77,12 @@ public function pdo()
return $this->pdo;
}

private function is_valid_uuid($uuid)
{
$pattern = '/^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i';
return preg_match($pattern, $uuid) === 1;
}

private function init_db($mysql_credentials)
{
$dsn = 'mysql:host=' . $mysql_credentials['host'] . ';dbname=' . $mysql_credentials['database'];
Expand Down Expand Up @@ -99,6 +111,11 @@ private function init_telegram($pdo, $bot_api_key, $bot_username)

public function online($uid)
{
if (!$this->is_valid_uuid($uid))
{
echo "Invalid UUID format rejected: " . $uid;
return;
}
$pdo = $this->pdo();
$sql = "SELECT * FROM `ob_online` where uid=:uid order by id DESC limit 1";
$statement = $pdo->prepare($sql);
Expand Down Expand Up @@ -127,6 +144,11 @@ public function online($uid)
$id = $row['id'];
$past = $row['now'];
$alarm = $row['alarm'];
$currentTime = time();

if (!$alarm && ($currentTime - $past) < self::MIN_UPDATE_INTERVAL) {
return;
}

$sql = "UPDATE `ob_online` SET `now` = :now, `past` = :past, `alarm` = :alarm WHERE `id` = :id";
$statement = $pdo->prepare($sql);
Expand Down