khanat-opennel-code/code/web/private_php/ams/autoload/sync.php

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<?php
/**
* handler for performing changes when shard is back online after being offline.
* the sync class is responsible for the syncdata function, which will synchronise the website with the shard
* (when the shard is offline, users can still change their password, email or even register)
* @author Daan Janssens, mentored by Matthew Lagoe
*/
class Sync{
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const OS_UNKNOWN = 1;
const OS_WIN = 2;
const OS_LINUX = 3;
const OS_OSX = 4;
/**
* performs the actions listed in the querycache.
* All entries in the querycache will be read and performed depending on their type.
* This is done because the shard could have been offline and we want changes made on the website (which is still online) to eventually hit the shard.
* These changes are: createPermissions, createUser, change_pass, change_mail
*/
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static public function syncdata ($display = false) {
if (function_exists('pcntl_fork')) {
$pid = pcntl_fork();
}
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global $AMS_TMPDIR;
$pidfile = $AMS_TMPDIR.'/ams_cron_pid';
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if(isset($pid) and function_exists('pcntl_fork') ) {
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// We're the main process.
} else {
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$pid = getmypid();
if(!file_exists($pidfile) or (file_exists($pidfile) && Sync::check_pid(file_get_contents($pid)))) {
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$file = fopen($pidfile, 'w+');
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if (!$file) {
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echo $pidfile.' is not writeable.';
error_log($pidfile.' is not writeable.');
throw new SystemExit();
}
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fwrite($file, $pid);
fclose($file);
try {
$dbl = new DBLayer("lib");
$statement = $dbl->executeWithoutParams("SELECT * FROM ams_querycache");
$rows = $statement->fetchAll();
foreach ($rows as $record) {
$db = new DBLayer($record['db']);
switch($record['type']) {
case 'createPermissions':
$decode = json_decode($record['query']);
$values = array('username' => $decode[0]);
//make connection with and put into shard db & delete from the lib
$sth=$db->selectWithParameter("UId", "user", $values, "Login= :username" );
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$result = $sth->fetchAll();
foreach ($result as $UId) {
$ins_values = array('UId' => $UId['UId']);
$ins_values['ClientApplication'] = "r2";
$ins_values['AccessPrivilege'] = "OPEN";
$db->insert("permission", $ins_values);
$ins_values['ClientApplication'] = 'ryzom_open';
$db->insert("permission",$ins_values);
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}
break;
case 'change_pass':
$decode = json_decode($record['query']);
$values = array('Password' => $decode[1]);
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//make connection with and put into shard db & delete from the lib
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$db->update("user", $values, "Login = '$decode[0]'");
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break;
case 'change_mail':
$decode = json_decode($record['query']);
$values = array('Email' => $decode[1]);
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//make connection with and put into shard db & delete from the lib
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$db->update("user", $values, "Login = '$decode[0]'");
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break;
case 'createUser':
$decode = json_decode($record['query']);
$values = array('Login' => $decode[0], 'Password' => $decode[1], 'Email' => $decode[2] );
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//make connection with and put into shard db & delete from the lib
$db->insert("user", $values);
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break;
}
$dbl->delete("ams_querycache", array('SID' => $record['SID']), "SID=:SID");
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}
if ($display == true) {
print('Syncing completed');
}
}
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catch (PDOException $e) {
if ($display == true) {
print('Something went wrong! The shard is probably still offline!');
print_r($e);
}
}
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unlink($pidfile);
}
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}
}
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public static function check_pid($pid){
$OS = Sync::getOS();
if ($OS == 2) {
$processes = explode( "\n", shell_exec( "tasklist.exe" ));
foreach( $processes as $process )
{
if( strpos( "Image Name", $process ) === 0
|| strpos( "===", $process ) === 0 )
continue;
$matches = false;
preg_match( "/(.*?)\s+(\d+).*$/", $process, $matches );
$pid = $matches[ 2 ];
}
} else {
return file_exists( "/proc/$pid" );
}
}
static public function getOS() {
switch (true) {
case stristr(PHP_OS, 'DAR'): return self::OS_OSX;
case stristr(PHP_OS, 'WIN'): return self::OS_WIN;
case stristr(PHP_OS, 'LINUX'): return self::OS_LINUX;
default : return self::OS_UNKNOWN;
}
}
}