<?php

/**

 * @version		$Id: weblink.php 14401 2010-01-26 14:10:00Z louis $

 * @package		Joomla

 * @subpackage	Content

 * @copyright	Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.

 * @license		GNU/GPL, see LICENSE.php

 * Joomla! is free software. This version may have been modified pursuant to the

 * GNU General Public License, and as distributed it includes or is derivative

 * of works licensed under the GNU General Public License or other free or open

 * source software licenses. See COPYRIGHT.php for copyright notices and

 * details.

 */



// Check to ensure this file is included in Joomla!

defined('_JEXEC') or die( 'Restricted access' );



jimport('joomla.application.component.model');



/**

 * Weblinks Component Weblink Model

 *

 * @package		Joomla

 * @subpackage	Weblinks

 * @since 1.5

 */

class WeblinksModelWeblink extends JModel

{

	/**

	 * Weblink id

	 *

	 * @var int

	 */

	var $_id = null;



	/**

	 * Weblink data

	 *

	 * @var array

	 */

	var $_data = null;



	/**

	 * Constructor

	 *

	 * @since 1.5

	 */

	function __construct()

	{

		parent::__construct();



		$id = JRequest::getVar('id', 0, '', 'int');

		$this->setId((int)$id);

	}



	/**

	 * Method to set the weblink identifier

	 *

	 * @access	public

	 * @param	int Weblink identifier

	 */

	function setId($id)

	{

		// Set weblink id and wipe data

		$this->_id		= $id;

		$this->_data	= null;

	}



	/**

	 * Method to get a weblink

	 *

	 * @since 1.5

	 */

	function &getData()

	{

		// Load the weblink data

		if ($this->_loadData())

		{

			// Initialize some variables

			$user = &JFactory::getUser();



			// Make sure the weblink is published

			if (!$this->_data->published) {

				JError::raiseError(404, JText::_("Resource Not Found"));

				return false;

			}



			// Check to see if the category is published

			if (!$this->_data->cat_pub) {

				JError::raiseError( 404, JText::_("Resource Not Found") );

				return;

			}



			// Check whether category access level allows access

			if ($this->_data->cat_access > $user->get('aid', 0)) {

				JError::raiseError( 403, JText::_('ALERTNOTAUTH') );

				return;

			}

		}

		else  $this->_initData();



		return $this->_data;

	}



	/**

	 * Method to increment the hit counter for the weblink

	 *

	 * @access	public

	 * @return	boolean	True on success

	 * @since	1.5

	 */

	function hit()

	{

		global $mainframe;



		if ($this->_id)

		{

			$weblink = & $this->getTable();

			$weblink->hit($this->_id);

			return true;

		}

		return false;

	}



	/**

	 * Tests if weblink is checked out

	 *

	 * @access	public

	 * @param	int	A user id

	 * @return	boolean	True if checked out

	 * @since	1.5

	 */

	function isCheckedOut( $uid=0 )

	{

		if ($this->_loadData())

		{

			if ($uid) {

				return ($this->_data->checked_out && $this->_data->checked_out != $uid);

			} else {

				return $this->_data->checked_out;

			}

		}

	}



	/**

	 * Method to checkin/unlock the weblink

	 *

	 * @access	public

	 * @return	boolean	True on success

	 * @since	1.5

	 */

	function checkin()

	{

		if ($this->_id)

		{

			$weblink = & $this->getTable();

			if(! $weblink->checkin($this->_id)) {

				$this->setError($this->_db->getErrorMsg());

				return false;

			}

			return true;

		}

		return false;

	}



	/**

	 * Method to checkout/lock the weblink

	 *

	 * @access	public

	 * @param	int	$uid	User ID of the user checking the article out

	 * @return	boolean	True on success

	 * @since	1.5

	 */

	function checkout($uid = null)

	{

		if ($this->_id)

		{

			// Make sure we have a user id to checkout the article with

			if (is_null($uid)) {

				$user	=& JFactory::getUser();

				$uid	= $user->get('id');

			}

			// Lets get to it and checkout the thing...

			$weblink = & $this->getTable();

			if(!$weblink->checkout($uid, $this->_id)) {

				$this->setError($this->_db->getErrorMsg());

				return false;

			}



			return true;

		}

		return false;

	}



	/**

	 * Method to store the weblink

	 *

	 * @access	public

	 * @return	boolean	True on success

	 * @since	1.5

	 */

	function store($data)

	{

		$row =& $this->getTable();



		// Bind the form fields to the web link table

		if (!$row->bind($data)) {

			$this->setError($this->_db->getErrorMsg());

			return false;

		}



		// Create the timestamp for the date

		$row->date = gmdate('Y-m-d H:i:s');



		// if new item, order last in appropriate group

		if (!$row->id) {

			$where = 'catid = ' . (int) $row->catid ;

			$row->ordering = $row->getNextOrder( $where );

		}

		// Make sure the web link table is valid

		if (!$row->check()) {

			$this->setError($this->_db->getErrorMsg());

			return false;

		}



		// Store the web link table to the database

		if (!$row->store()) {

			$this->setError($this->_db->getErrorMsg());

			return false;

		}



		return true;

	}



	/**

	 * Method to load content weblink data

	 *

	 * @access	private

	 * @return	boolean	True on success

	 * @since	1.5

	 */

	function _loadData()

	{

		// Lets load the content if it doesn't already exist

		if (empty($this->_data))

		{

			$query = 'SELECT w.*, cc.title AS category,' .

					' cc.published AS cat_pub, cc.access AS cat_access'.

					' FROM #__weblinks AS w' .

					' LEFT JOIN #__categories AS cc ON cc.id = w.catid' .

					' WHERE w.id = '. (int) $this->_id;

			$this->_db->setQuery($query);

			$this->_data = $this->_db->loadObject();

			return (boolean) $this->_data;

		}

		return true;

	}



	/**

	 * Method to initialise the weblink data

	 *

	 * @access	private

	 * @return	boolean	True on success

	 * @since	1.5

	 */

	function _initData()

	{

		// Lets load the content if it doesn't already exist

		if (empty($this->_data))

		{

			$weblink = new stdClass();

			$weblink->id					= 0;

			$weblink->catid				= 0;

			$weblink->sid				= 0;

			$weblink->title				= null;

			$weblink->url				= null;

			$weblink->description			= null;

			$weblink->date				= null;

			$weblink->hits				= 0;

			$weblink->published			= 0;

			$weblink->checked_out			= 0;

			$weblink->checked_out_time 	= 0;

			$weblink->ordering			= 0;

			$weblink->archived			= 0;

			$weblink->approved			= 0;

			$weblink->params				= null;

			$weblink->category			= null;

			$this->_data					= $weblink;

			return (boolean) $this->_data;

		}

		return true;

	}

}