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<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_users
 *
 * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Users\Administrator\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
use Joomla\CMS\MVC\Model\ListModel;
use Joomla\CMS\Table\Table;
use Joomla\Database\DatabaseQuery;
use Joomla\Database\ParameterType;

/**
 * Methods supporting a list of user access level records.
 *
 * @since  1.6
 */
class LevelsModel extends ListModel
{
	/**
	 * Override parent constructor.
	 *
	 * @param   array                $config   An optional associative array of configuration settings.
	 * @param   MVCFactoryInterface  $factory  The factory.
	 *
	 * @see     \Joomla\CMS\MVC\Model\BaseDatabaseModel
	 * @since   3.2
	 */
	public function __construct($config = array(), MVCFactoryInterface $factory = null)
	{
		if (empty($config['filter_fields']))
		{
			$config['filter_fields'] = array(
				'id', 'a.id',
				'title', 'a.title',
				'ordering', 'a.ordering',
			);
		}

parent::__construct($config, $factory);
	}

/**
	 * Method to auto-populate the model state.
	 *
	 * Note. Calling getState in this method will result in recursion.
	 *
	 * @param   string  $ordering   An optional ordering field.
	 * @param   string  $direction  An optional direction (asc|desc).
	 *
	 * @return  void
	 *
	 * @since   1.6
	 */
	protected function populateState($ordering = 'a.ordering', $direction = 'asc')
	{
		// Load the parameters.
		$params = ComponentHelper::getParams('com_users');
		$this->setState('params', $params);

// List state information.
		parent::populateState($ordering, $direction);
	}

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

return parent::getStoreId($id);
	}

/**
	 * Build an SQL query to load the list data.
	 *
	 * @return  DatabaseQuery
	 */
	protected function getListQuery()
	{
		// Create a new query object.
		$db = $this->getDbo();
		$query = $db->getQuery(true);

// Select the required fields from the table.
		$query->select(
			$this->getState(
				'list.select',
				'a.*'
			)
		);
		$query->from($db->quoteName('#__viewlevels') . ' AS a');

// Add the level in the tree.
		$query->group('a.id, a.title, a.ordering, a.rules');

// Filter the items over the search string if set.
		$search = $this->getState('filter.search');

if (!empty($search))
		{
			if (stripos($search, 'id:') === 0)
			{
				$ids = (int) substr($search, 3);
				$query->where($db->quoteName('a.id') . ' = :id');
				$query->bind(':id', $ids, ParameterType::INTEGER);
			}
			else
			{
				$search = '%' . trim($search) . '%';
				$query->where('a.title LIKE :title')
					->bind(':title', $search);
			}
		}

$query->group('a.id');

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

return $query;
	}

/**
	 * Method to adjust the ordering of a row.
	 *
	 * @param   integer  $pk         The ID of the primary key to move.
	 * @param   integer  $direction  Increment, usually +1 or -1
	 *
	 * @return  boolean  False on failure or error, true otherwise.
	 */
	public function reorder($pk, $direction = 0)
	{
		// Sanitize the id and adjustment.
		$pk = (!empty($pk)) ? $pk : (int) $this->getState('level.id');
		$user = Factory::getUser();

// Get an instance of the record's table.
		$table = Table::getInstance('ViewLevel', 'Joomla\\CMS\Table\\');

// Load the row.
		if (!$table->load($pk))
		{
			$this->setError($table->getError());

return false;
		}

// Access checks.
		$allow = $user->authorise('core.edit.state', 'com_users');

if (!$allow)
		{
			$this->setError(Text::_('JLIB_APPLICATION_ERROR_EDITSTATE_NOT_PERMITTED'));

return false;
		}

// Move the row.
		// TODO: Where clause to restrict category.
		$table->move($pk);

return true;
	}

/**
	 * Saves the manually set order of records.
	 *
	 * @param   array    $pks    An array of primary key ids.
	 * @param   integer  $order  Order position
	 *
	 * @return  boolean  Boolean true on success, boolean false
	 *
	 * @throws  \Exception
	 */
	public function saveorder($pks, $order)
	{
		$table = Table::getInstance('viewlevel', 'Joomla\\CMS\Table\\');
		$user = Factory::getUser();
		$conditions = array();

if (empty($pks))
		{
			Factory::getApplication()->enqueueMessage(Text::_('COM_USERS_ERROR_LEVELS_NOLEVELS_SELECTED'), 'error');

return false;
		}

// Update ordering values
		foreach ($pks as $i => $pk)
		{
			$table->load((int) $pk);

// Access checks.
			$allow = $user->authorise('core.edit.state', 'com_users');

if (!$allow)
			{
				// Prune items that you can't change.
				unset($pks[$i]);
				Factory::getApplication()->enqueueMessage(Text::_('JLIB_APPLICATION_ERROR_EDITSTATE_NOT_PERMITTED'), 'error');
			}
			elseif ($table->ordering != $order[$i])
			{
				$table->ordering = $order[$i];

if (!$table->store())
				{
					$this->setError($table->getError());

return false;
				}
			}
		}

// Execute reorder for each category.
		foreach ($conditions as $cond)
		{
			$table->load($cond[0]);
			$table->reorder($cond[1]);
		}

return true;
	}
}