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/home/develito/www/administrator/components/com_fields/models/groups.php

<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_fields
 *
 * @copyright   (C) 2016 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */
defined('_JEXEC') or die;

use Joomla\Registry\Registry;
use Joomla\Utilities\ArrayHelper;

/**
 * Groups Model
 *
 * @since  3.7.0
 */
class FieldsModelGroups extends JModelList
{
	/**
	 * Context string for the model type.  This is used to handle uniqueness
	 * when dealing with the getStoreId() method and caching data structures.
	 *
	 * @var    string
	 * @since   3.7.0
	 */
	protected $context = 'com_fields.groups';

/**
	 * Constructor.
	 *
	 * @param   array  $config  An optional associative array of configuration settings.
	 *
	 * @see     JModelLegacy
	 * @since   3.7.0
	 */
	public function __construct($config = array())
	{
		if (empty($config['filter_fields']))
		{
			$config['filter_fields'] = array(
				'id', 'a.id',
				'title', 'a.title',
				'type', 'a.type',
				'state', 'a.state',
				'access', 'a.access',
				'access_level',
				'language', 'a.language',
				'ordering', 'a.ordering',
				'checked_out', 'a.checked_out',
				'checked_out_time', 'a.checked_out_time',
				'created', 'a.created',
				'created_by', 'a.created_by',
			);
		}

parent::__construct($config);
	}

/**
	 * Method to auto-populate the model state.
	 *
	 * This method should only be called once per instantiation and is designed
	 * to be called on the first call to the getState() method unless the model
	 * configuration flag to ignore the request is set.
	 *
	 * Note. Calling getState in this method will result in recursion.
	 *
	 * @param   string  $ordering   An optional ordering field.
	 * @param   string  $direction  An optional direction (asc|desc).
	 *
	 * @return  void
	 *
	 * @since   3.7.0
	 */
	protected function populateState($ordering = null, $direction = null)
	{
		// List state information.
		parent::populateState('a.ordering', 'asc');

$context = $this->getUserStateFromRequest($this->context . '.context', 'context', 'com_content', 'CMD');
		$this->setState('filter.context', $context);
	}

/**
	 * Method to get a store id based on the 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  $id  An identifier string to generate the store id.
	 *
	 * @return  string  A store id.
	 *
	 * @since   3.7.0
	 */
	protected function getStoreId($id = '')
	{
		// Compile the store id.
		$id .= ':' . $this->getState('filter.search');
		$id .= ':' . $this->getState('filter.context');
		$id .= ':' . $this->getState('filter.state');
		$id .= ':' . print_r($this->getState('filter.language'), true);

return parent::getStoreId($id);
	}

/**
	 * Method to get a JDatabaseQuery object for retrieving the data set from a database.
	 *
	 * @return  JDatabaseQuery   A JDatabaseQuery object to retrieve the data set.
	 *
	 * @since   3.7.0
	 */
	protected 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.*'));
		$query->from('#__fields_groups AS a');

// Join over the language
		$query->select('l.title AS language_title, l.image AS language_image')
			->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')->join('LEFT', '#__users AS uc ON uc.id=a.checked_out');

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

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

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

// Filter by access level.
		if ($access = $this->getState('filter.access'))
		{
			if (is_array($access))
			{
				$access = ArrayHelper::toInteger($access);
				$query->where('a.access in (' . implode(',', $access) . ')');
			}
			else
			{
				$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
		$state = $this->getState('filter.state');

if (is_numeric($state))
		{
			$query->where('a.state = ' . (int) $state);
		}
		elseif (!$state)
		{
			$query->where('a.state 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));
			}
			else
			{
				$search = $db->quote('%' . str_replace(' ', '%', $db->escape(trim($search), true) . '%'));
				$query->where('a.title LIKE ' . $search);
			}
		}

// Filter on the language.
		if ($language = $this->getState('filter.language'))
		{
			$language = (array) $language;

foreach ($language as $key => $l)
			{
				$language[$key] = $db->quote($l);
			}

$query->where('a.language in (' . implode(',', $language) . ')');
		}

// Add the list ordering clause
		$listOrdering = $this->getState('list.ordering', 'a.ordering');
		$listDirn = $db->escape($this->getState('list.direction', 'ASC'));

$query->order($db->escape($listOrdering) . ' ' . $listDirn);

return $query;
	}

/**
	 * Gets an array of objects from the results of database query.
	 *
	 * @param   string   $query       The query.
	 * @param   integer  $limitstart  Offset.
	 * @param   integer  $limit       The number of records.
	 *
	 * @return  array  An array of results.
	 *
	 * @since   3.8.7
	 * @throws  RuntimeException
	 */
	protected function _getList($query, $limitstart = 0, $limit = 0)
	{
		$result = parent::_getList($query, $limitstart, $limit);

if (is_array($result))
		{
			foreach ($result as $group)
			{
				$group->params = new Registry($group->params);
			}
		}

return $result;
	}
}