class.ilRegExpInputGUI.php

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<?php
/*
    +-----------------------------------------------------------------------------+
    | ILIAS open source                                                           |
    +-----------------------------------------------------------------------------+
    | Copyright (c) 1998-2007 ILIAS open source, University of Cologne            |
    |                                                                             |
    | This program is free software; you can redistribute it and/or               |
    | modify it under the terms of the GNU General Public License                 |
    | as published by the Free Software Foundation; either version 2              |
    | of the License, or (at your option) any later version.                      |
    |                                                                             |
    | This program is distributed in the hope that it will be useful,             |
    | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
    | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
    | GNU General Public License for more details.                                |
    |                                                                             |
    | You should have received a copy of the GNU General Public License           |
    | along with this program; if not, write to the Free Software                 |
    | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
    +-----------------------------------------------------------------------------+
*/

class ilRegExpInputGUI extends ilTextInputGUI
{
    private $pattern;
    
    public function __construct($a_title = "", $a_postvar = "")
    {
        global $DIC;

        $this->lng = $DIC->language();
        parent::__construct($a_title, $a_postvar);
        $this->setType("feedurl");
    }

    public function setNoMatchMessage($a_nomatchmessage)
    {
        $this->nomatchmessage = $a_nomatchmessage;
    }

    public function getNoMatchMessage()
    {
        return $this->nomatchmessage;
    }

    public function setPattern($pattern)
    {
        $this->pattern = $pattern;
    }
    
    public function getPattern()
    {
        return $this->pattern;
    }

    public function checkInput()
    {
        $lng = $this->lng;
        
        // this line is necessary, otherwise it is a security issue (Alex)
        $_POST[$this->getPostVar()] = ilUtil::stripSlashes($_POST[$this->getPostVar()]);
        
        $value = $_POST[$this->getPostVar()];
        
        if (!$this->getRequired() && strcasecmp($value, "") == 0) {
            return true;
        }
        
        if ($this->getRequired() && trim($value) == "") {
            $this->setAlert($lng->txt("msg_input_is_required"));

            return false;
        }

        $result = preg_match($this->pattern, $value);
        if (!$result) {
            if ($this->getNoMatchMessage() == "") {
                $this->setAlert($lng->txt("msg_input_does_not_match_regexp"));
            } else {
                $this->setAlert($this->getNoMatchMessage());
            }
        }
        return $result;
    }
}