newsfeed.php

Joomla!是一套获得过多个奖项的内容管理系统(Content Management System, CMS)。Joomla!采用PHP+MySQL数据库开发

<?php
/**
 * @version		$Id: newsfeed.php 10704 2008-08-21 09:38:40Z eddieajau $
 * @package		Joomla
 * @subpackage	Content
 * @copyright	Copyright (C) 2005 - 2008 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');

/**
 * Newsfeeds Component Newsfeed Model
 *
 * @package		Joomla
 * @subpackage	Newsfeeds
 * @since 1.5
 */
class NewsfeedsModelNewsfeed extends JModel
{
	/**
	 * Newsfeed id
	 *
	 * @var int
	 */
	var $_id = null;

	/**
	 * Newsfeed 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 newsfeed identifier
	 *
	 * @access	public
	 * @param	int Newsfeed identifier
	 */
	function setId($id)
	{
		// Set weblink id and wipe data
		$this->_id	 = $id;
		$this->_data = null;
	}

	/**
	 * Method to get the newsfeed data
	 *
	 * @since 1.5
	 */
	function &getData()
	{
		// Load the weblink data
		if ($this->_loadData())
		{
			// Initialize some variables
			$user = &JFactory::getUser();

			// Make sure the category 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;
			}

		}

		return $this->_data;
	}

	/**
	 * Method to load newsfeed 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))
		{
			$query = 'SELECT f.*, cc.title AS category,'.
					' cc.published AS cat_pub, cc.access AS cat_access,'.
					' CASE WHEN CHAR_LENGTH(cc.alias) THEN CONCAT_WS(\':\', cc.id, cc.alias) ELSE cc.id END as catslug'.
					' FROM #__newsfeeds AS f' .
					' LEFT JOIN #__categories AS cc ON cc.id = f.catid' .
					' WHERE f.id = '.$this->_id;
			$this->_db->setQuery($query);
			$this->_data = $this->_db->loadObject();
			return (boolean) $this->_data;
		}
		return true;
	}

}
?>