class.ilAssQuestionProcessLockFileStorage.php

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<?php
/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once 'Services/FileSystem/classes/class.ilFileSystemStorage.php';

class ilAssQuestionProcessLockFileStorage extends ilFileSystemStorage
{
    private $subPath;
    
    public function __construct($questionId, $userId)
    {
        parent::__construct(ilFileSystemStorage::STORAGE_DATA, true, $questionId);
        
        $this->initSubPath($userId);
    }

    protected function getPathPrefix()
    {
        return 'ilAssQuestionProcessLocks';
    }

    protected function getPathPostfix()
    {
        return 'question';
    }
    
    public function getPath()
    {
        return parent::getPath() . '/' . $this->subPath;
    }

    public function create()
    {
        set_error_handler(function ($severity, $message, $file, $line) {
            throw new ErrorException($message, $severity, 0, $file, $line);
        });

        try {
            ilUtil::makeDirParents($this->getPath());
            restore_error_handler();
        } catch (Exception $e) {
            restore_error_handler();
        }

        if (!file_exists($this->getPath())) {
            throw new ErrorException(sprintf('Could not find directory: %s', $this->getPath()));
        }

        return true;
    }
    
    private function initSubPath($userId)
    {
        $userId = (string) $userId;
        
        $path = array();

        for ($i = 0, $max = strlen($userId); $i < $max; $i++) {
            $path[] = substr($userId, $i, 1);
        }

        $this->subPath = implode('/', $path);
    }
}