<?php
/**
 * @package		Joomla.Administrator
 * @subpackage	com_categories
 * @copyright	Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
 * @license		GNU General Public License version 2 or later; see LICENSE.txt
 */

// Check to ensure this file is included in Joomla!
defined('_JEXEC') or die;

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

/**
 * Categories Component Categories Model
 *
 * @package		Joomla.Administrator
 * @subpackage	com_categories
 * @since		1.6
 */
class CategoriesModelCategories extends JModelList
{
	/**
	 * Constructor.
	 *
	 * @param	array	An optional associative array of configuration settings.
	 * @see		JController
	 * @since	1.6
	 */
	public function __construct($config = array())
	{
		if (empty($config['filter_fields'])) {
			$config['filter_fields'] = array(
				'id', 'a.id',
				'title', 'a.title',
				'alias', 'a.alias',
				'published', 'a.published',
				'access', 'a.access', 'access_level',
				'language', 'a.language',
				'checked_out', 'a.checked_out',
				'checked_out_time', 'a.checked_out_time',
				'created_time', 'a.created_time',
				'created_user_id', 'a.created_user_id',
				'lft', 'a.lft',
				'rgt', 'a.rgt',
				'level', 'a.level',
				'path', 'a.path',
			);
		}

		parent::__construct($config);
	}

	/**
	 * Method to auto-populate the model state.
	 *
	 * Note. Calling getState in this method will result in recursion.
	 *
	 * @param	string	An optional ordering field.
	 * @param	string	An optional direction (asc|desc).
	 *
	 * @return	void
	 * @since	1.6
	 */
	protected function populateState($ordering = null, $direction = null)
	{
		// Initialise variables.
		$app		= JFactory::getApplication();
		$context	= $this->context;

		$extension = $app->getUserStateFromRequest('com_categories.categories.filter.extension', 'extension', 'com_content', 'cmd');

		$this->setState('filter.extension', $extension);
		$parts = explode('.', $extension);

		// extract the component name
		$this->setState('filter.component', $parts[0]);

		// extract the optional section name
		$this->setState('filter.section', (count($parts) > 1) ? $parts[1] : null);

		$search = $this->getUserStateFromRequest($context.'.search', 'filter_search');
		$this->setState('filter.search', $search);

		$level = $this->getUserStateFromRequest($context.'.filter.level', 'filter_level', 0, 'int');
		$this->setState('filter.level', $level);

		$access = $this->getUserStateFromRequest($context.'.filter.access', 'filter_access', 0, 'int');
		$this->setState('filter.access', $access);

		$published = $this->getUserStateFromRequest($context.'.filter.published', 'filter_published', '');
		$this->setState('filter.published', $published);

		$language = $this->getUserStateFromRequest($context.'.filter.language', 'filter_language', '');
		$this->setState('filter.language', $language);

		// List state information.
		parent::populateState('a.lft', 'asc');
	}

	/**
	 * Method to get a store id based on model configuration state.
	 *
	 * This is necessary because the model is used by the component and
	 * different modules that might need different sets of data or different
	 * ordering requirements.
	 *
	 * @param	string		$id	A prefix for the store id.
	 *
	 * @return	string		A store id.
	 * @since	1.6
	 */
	protected function getStoreId($id = '')
	{
		// Compile the store id.
		$id	.= ':'.$this->getState('filter.search');
		$id	.= ':'.$this->getState('filter.extension');
		$id	.= ':'.$this->getState('filter.published');
		$id	.= ':'.$this->getState('filter.language');

		return parent::getStoreId($id);
	}

	/**
	 * @return	string
	 * @since	1.6
	 */
	function getListQuery()
	{
		// Create a new query object.
		$db		= $this->getDbo();
		$query	= $db->getQuery(true);
		$user	= JFactory::getUser();

		// Select the required fields from the table.
		$query->select(
			$this->getState(
				'list.select',
				'a.id, a.title, a.alias, a.note, a.published, a.access' .
				', a.checked_out, a.checked_out_time, a.created_user_id' .
				', a.path, a.parent_id, a.level, a.lft, a.rgt' .
				', a.language'
			)
		);
		$query->from('#__categories AS a');

		// Join over the language
		$query->select('l.title AS language_title');
		$query->join('LEFT', $db->quoteName('#__languages').' AS l ON l.lang_code = a.language');

		// Join over the users for the checked out user.
		$query->select('uc.name AS editor');
		$query->join('LEFT', '#__users AS uc ON uc.id=a.checked_out');

		// Join over the asset groups.
		$query->select('ag.title AS access_level');
		$query->join('LEFT', '#__viewlevels AS ag ON ag.id = a.access');

		// Join over the users for the author.
		$query->select('ua.name AS author_name');
		$query->join('LEFT', '#__users AS ua ON ua.id = a.created_user_id');

		// Filter by extension
		if ($extension = $this->getState('filter.extension')) {
			$query->where('a.extension = '.$db->quote($extension));
		}

		// Filter on the level.
		if ($level = $this->getState('filter.level')) {
			$query->where('a.level <= '.(int) $level);
		}

		// Filter by access level.
		if ($access = $this->getState('filter.access')) {
			$query->where('a.access = ' . (int) $access);
		}

		// Implement View Level Access
		if (!$user->authorise('core.admin'))
		{
		    $groups	= implode(',', $user->getAuthorisedViewLevels());
			$query->where('a.access IN ('.$groups.')');
		}

		// Filter by published state
		$published = $this->getState('filter.published');
		if (is_numeric($published)) {
			$query->where('a.published = ' . (int) $published);
		}
		elseif ($published === '') {
			$query->where('(a.published IN (0, 1))');
		}

		// Filter by search in title
		$search = $this->getState('filter.search');
		if (!empty($search)) {
			if (stripos($search, 'id:') === 0) {
				$query->where('a.id = '.(int) substr($search, 3));
			}
			elseif (stripos($search, 'author:') === 0) {
				$search = $db->Quote('%'.$db->escape(substr($search, 7), true).'%');
				$query->where('(ua.name LIKE '.$search.' OR ua.username LIKE '.$search.')');
			}
			else {
				$search = $db->Quote('%'.$db->escape($search, true).'%');
				$query->where('(a.title LIKE '.$search.' OR a.alias LIKE '.$search.' OR a.note LIKE '.$search.')');
			}
		}

		// Filter on the language.
		if ($language = $this->getState('filter.language')) {
			$query->where('a.language = '.$db->quote($language));
		}

		// Add the list ordering clause
		$listOrdering = $this->getState('list.ordering', 'a.lft');
		$listDirn = $db->escape($this->getState('list.direction', 'ASC'));
		if ($listOrdering == 'a.access') {
			$query->order('a.access '.$listDirn.', a.lft '.$listDirn);
		} else {
			$query->order($db->escape($listOrdering).' '.$listDirn);
		}

		//echo nl2br(str_replace('#__','jos_',$query));
		return $query;
	}
}
