<?php
/**
 * Virtual File System
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage vfs
 */


/**
 * Virtual File System
 *
 * Basics
 *
 * @version 0.3.0
 * @package WB
 * @subpackage vfs
 */
class WBVFS extends WBStdClass
{
    /**
     * file information table
     */
    const TABLE_FILE    =   'vfsfile';

    /**
     * file upload chunks
     */
    const TABLE_UPLOAD  =   'vfsfileupload';

    /**
     * user table
     */
    const TABLE_USER = 'user';

    const MIME_PLAIN    =   'plain';

    /**
     * constructor
     *
     * @param array $parameter
     */
    public function __construct($parameter = array())
    {
    }

    /**
     * Switch on/off translation feature
     *
     * @param bool|int $switch
     */
    public function switchTranslation($switch = false)
    {
        $switch  =  intval($switch);
        if (0 < $switch) {
            $switch =   true;
        } else {
            $switch =   false;
        }
        $this->doSwitchTranslation($switch);
    }

    /**
     * Actually switch translation
     *
     * @param bool $switch
     */
    protected function doSwitchTranslation($switch)
    {
    }

    /**
     * make name unique
     *
     * automatically change name like Windows(tm) explorer does
     *
     * @param string $name
     * @param array $siblings
     * @return string
     */
    protected function makeUniqueName($name, $siblings)
    {
        // remove forward slashes from name
        $name       =   str_replace('/', '_', $name);

        $i          =   1;
        $nameFormat =   $name . ' (%d)';

        // see whether name is already a numbered one
        if (preg_match('/(.+)\s\((\d+)\)$/', $name, $match)) {
            $i      =   intval($match[2]);
            $nameFormat =   $match[1] . ' (%d)';
        }

        while ($i < 1000) {
            $ok =   true;
            foreach ($siblings as $s) {
                // check name of siblings
                if ($name == $s['name']) {
                    $ok =   false;
                    break;
                }
            }
            if ($ok) {
                break;
            }
            ++$i;
            $name   =   sprintf($nameFormat, $i);
        }
        return $name;
    }

    /**
     * Extract Parameter 4 Table Access
     *
     * Avoid conflict of table and VFS parameter
     *
     * @param array
     * @return array
     */
    protected function getTableParameter($parameter)
    {
        $tableParam     =   array();
        if (!is_array($parameter)) {
            return $tableParam;
        }
        foreach ($parameter as $k => $v) {
            if (0 != strncmp('db', $k, 2)) {
                continue;
            }
            if ('dbconfig' == $k) {
                $tableParam[$k] =   $v;
                continue;
            }
            $tableParam[substr($k, 2)]  =   $v;

        }
        return $tableParam;
    }
}