class.ilFeedUrlInputGUI.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 ilFeedUrlInputGUI extends ilTextInputGUI
{
        protected $value;
        protected $maxlength = 200;
        protected $size = 40;
        
        function __construct($a_title = "", $a_postvar = "")
        {
                parent::__construct($a_title, $a_postvar);
                $this->setType("feedurl");
        }

        function checkInput()
        {
                global $lng;
                
                $lng->loadLanguageModule("feed");
                
                $_POST[$this->getPostVar()] = 
                        ilUtil::stripSlashes($_POST[$this->getPostVar()]);
                        
                // remove safari pseudo protocol
                if (substr($_POST[$this->getPostVar()], 0, 5) == "feed:")
                {
                        $_POST[$this->getPostVar()] = "http:".
                                substr($_POST[$this->getPostVar()], 5);
                }
                
                // add missing http://
                if (!is_int(strpos($_POST[$this->getPostVar()], "://")))
                {
                        $_POST[$this->getPostVar()] = "http://".$_POST[$this->getPostVar()];
                }
                        
                // check required
                if ($this->getRequired() && trim($_POST[$this->getPostVar()]) == "")
                {
                        $this->setAlert($lng->txt("msg_input_is_required"));

                        return false;
                }
                
                // check feed url
                $url = $_POST[$this->getPostVar()];
                include_once("./Services/Feeds/classes/class.ilExternalFeed.php");
                $check = ilExternalFeed::_checkUrl($url);

                // try to determine a feed url, if we failed here
                if  ($check !== true)
                {
                        $url2 = ilExternalFeed::_determineFeedUrl($url);
                        $check2 = ilExternalFeed::_checkUrl($url2);
                        
                        if ($check2 === true)
                        {
                                $_POST[$this->getPostVar()] = $url2;
                                $check = true;
                        }
                }

                // if check failed, output error message
                if  ($check !== true)
                {
                        $check = str_replace("MagpieRSS:", "", $check);
                        $this->setAlert($lng->txt("feed_no_valid_url")."<br />".$check);
                        return false;
                }
                
                return true;
        }

}