<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_finder
 *
 * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('_JEXEC') or die;

/**
 * Filters model class for Finder.
 *
 * @package     Joomla.Administrator
 * @subpackage  com_finder
 * @since       2.5
 */
class FinderModelFilters extends JModelList
{
	/**
	 * Constructor.
	 *
	 * @param   array  $config  An associative array of configuration settings. [optional]
	 *
	 * @since   2.5
	 * @see     JController
	 */
	public function __construct($config = array())
	{
		if (empty($config['filter_fields']))
		{
			$config['filter_fields'] = array(
				'filter_id', 'a.filter_id',
				'title', 'a.title',
				'state', 'a.state',
				'created_by_alias', 'a.created_by_alias',
				'created', 'a.created',
				'map_count', 'a.map_count'
			);
		}

		parent::__construct($config);
	}

	/**
	 * Build an SQL query to load the list data.
	 *
	 * @return  JDatabaseQuery  A JDatabaseQuery object
	 *
	 * @since   2.5
	 */
	protected function getListQuery()
	{
		$db = $this->getDbo();
		$query = $db->getQuery(true);

		// Select all fields from the table.
		$query->select('a.*')
			->from($db->quoteName('#__finder_filters') . ' AS a');

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

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

		// Check for a search filter.
		if ($this->getState('filter.search'))
		{
			$query->where('( a.title LIKE \'%' . $db->escape($this->getState('filter.search')) . '%\' )');
		}

		// If the model is set to check item state, add to the query.
		if (is_numeric($this->getState('filter.state')))
		{
			$query->where('a.state = ' . (int) $this->getState('filter.state'));
		}

		// Add the list ordering clause.
		$query->order($db->escape($this->getState('list.ordering') . ' ' . $db->escape($this->getState('list.direction'))));

		return $query;
	}

	/**
	 * 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  $id  A prefix for the store id. [optional]
	 *
	 * @return  string  A store id.
	 *
	 * @since   2.5
	 */
	protected function getStoreId($id = '')
	{
		// Compile the store id.
		$id .= ':' . $this->getState('filter.search');
		$id .= ':' . $this->getState('filter.state');

		return parent::getStoreId($id);
	}

	/**
	 * Method to auto-populate the model state.  Calling getState in this method will result in recursion.
	 *
	 * @param   string  $ordering   An optional ordering field. [optional]
	 * @param   string  $direction  An optional direction. [optional]
	 *
	 * @return  void
	 *
	 * @since   2.5
	 */
	protected function populateState($ordering = null, $direction = null)
	{
		// Load the filter state.
		$search = $this->getUserStateFromRequest($this->context . '.filter.search', 'filter_search');
		$this->setState('filter.search', $search);

		$state = $this->getUserStateFromRequest($this->context . '.filter.state', 'filter_state', '', 'string');
		$this->setState('filter.state', $state);

		// Load the parameters.
		$params = JComponentHelper::getParams('com_finder');
		$this->setState('params', $params);

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