contao postupload, recreate intern cache and check if db update is required

postupload.php

<?php

include_once __DIR__.'/../system/initialize.php';

class Postuplaod extends Database\Installer
{

	private static $instance = null;

	public function __construct()
	{

		$this->import('Automator');
		$this->import('RepositoryManager');
		parent::__construct();
	}

	public static function getInstance()
	{
		if(!self::$instance) {
			self::$instance = new self();
		}
		return self::$instance;
	}

    public function run()
    {
        $this->resetInternCache();
		$this->checkSql();
    }

	public function checkSql()
	{
		if($update = $this->getSql()) {
			echo 'need database update!!!'."\n";
			echo $update;
		}
	}

	public function getSql()
	{
		$count = 0;
		$return = '';
		$sql_command = $this->compileCommands();


		if (empty($sql_command))
		{
			return '';
		}


		$_SESSION['sql_commands'] = array();

		$arrOperations = array
		(
			'CREATE'        => $GLOBALS['TL_LANG']['tl_install']['CREATE'],
			'ALTER_ADD'     => $GLOBALS['TL_LANG']['tl_install']['ALTER_ADD'],
//			'ALTER_CHANGE'  => $GLOBALS['TL_LANG']['tl_install']['ALTER_CHANGE'],
//			'ALTER_DROP'    => $GLOBALS['TL_LANG']['tl_install']['ALTER_DROP'],
//			'DROP'          => $GLOBALS['TL_LANG']['tl_install']['DROP']
		);

		foreach ($arrOperations as $command => $label)
		{
			if (is_array($sql_command[$command])) {
				// Headline
				$return .= $label . "\n";
			}
   		}

		return $return;
	}


    private function resetInternCache()
    {


		echo 'delete internal Cache'."\n";
		$this->Automator->purgeInternalCache();
		echo 'generate internal Cache'."\n";
		$this->Automator->generateInternalCache();

    }

}

$post = Postuplaod::getInstance();
$post->run();