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<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_modules
 *
 * @copyright   (C) 2008 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Modules\Administrator\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\Model\ListModel;
use Joomla\Database\DatabaseQuery;
use Joomla\Database\ParameterType;
use Joomla\String\StringHelper;
use Joomla\Utilities\ArrayHelper;

/**
 * Modules Component Module Model
 *
 * @since  1.5
 */
class ModulesModel extends ListModel
{
	/**
	 * Constructor.
	 *
	 * @param   array  $config  An optional associative array of configuration settings.
	 *
	 * @see     \JController
	 * @since   1.6
	 */
	public function __construct($config = array())
	{
		if (empty($config['filter_fields']))
		{
			$config['filter_fields'] = array(
				'id', 'a.id',
				'title', 'a.title',
				'checked_out', 'a.checked_out',
				'checked_out_time', 'a.checked_out_time',
				'published', 'a.published', 'state',
				'access', 'a.access',
				'ag.title', 'access_level',
				'ordering', 'a.ordering',
				'module', 'a.module',
				'language', 'a.language',
				'l.title', 'language_title',
				'publish_up', 'a.publish_up',
				'publish_down', 'a.publish_down',
				'client_id', 'a.client_id',
				'position', 'a.position',
				'pages',
				'name', 'e.name',
				'menuitem',
			);
		}

parent::__construct($config);
	}

/**
	 * 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.position', $direction = 'asc')
	{
		$app = Factory::getApplication();

$layout = $app->input->get('layout', '', 'cmd');

// Adjust the context to support modal layouts.
		if ($layout)
		{
			$this->context .= '.' . $layout;
		}

// Make context client aware
		$this->context .= '.' . $app->input->get->getInt('client_id', 0);

// Load the filter state.
		$this->setState('filter.search', $this->getUserStateFromRequest($this->context . '.filter.search', 'filter_search', '', 'string'));
		$this->setState('filter.position', $this->getUserStateFromRequest($this->context . '.filter.position', 'filter_position', '', 'string'));
		$this->setState('filter.module', $this->getUserStateFromRequest($this->context . '.filter.module', 'filter_module', '', 'string'));
		$this->setState('filter.menuitem', $this->getUserStateFromRequest($this->context . '.filter.menuitem', 'filter_menuitem', '', 'cmd'));
		$this->setState('filter.access', $this->getUserStateFromRequest($this->context . '.filter.access', 'filter_access', '', 'cmd'));

// If in modal layout on the frontend, state and language are always forced.
		if ($app->isClient('site') && $layout === 'modal')
		{
			$this->setState('filter.language', 'current');
			$this->setState('filter.state', 1);
		}
		// If in backend (modal or not) we get the same fields from the user request.
		else
		{
			$this->setState('filter.language', $this->getUserStateFromRequest($this->context . '.filter.language', 'filter_language', '', 'string'));
			$this->setState('filter.state', $this->getUserStateFromRequest($this->context . '.filter.state', 'filter_state', '', 'string'));
		}

// Special case for the client id.
		if ($app->isClient('site') || $layout === 'modal')
		{
			$this->setState('client_id', 0);
			$clientId = 0;
		}
		else
		{
			$clientId = (int) $this->getUserStateFromRequest($this->context . '.client_id', 'client_id', 0, 'int');
			$clientId = (!in_array($clientId, array(0, 1))) ? 0 : $clientId;
			$this->setState('client_id', $clientId);
		}

// Use a different filter file when client is administrator
		if ($clientId == 1)
		{
			$this->filterFormName = 'filter_modulesadmin';
		}

// Load the parameters.
		$params = ComponentHelper::getParams('com_modules');
		$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('client_id');
		$id .= ':' . $this->getState('filter.search');
		$id .= ':' . $this->getState('filter.state');
		$id .= ':' . $this->getState('filter.position');
		$id .= ':' . $this->getState('filter.module');
		$id .= ':' . $this->getState('filter.menuitem');
		$id .= ':' . $this->getState('filter.access');
		$id .= ':' . $this->getState('filter.language');

return parent::getStoreId($id);
	}

/**
	 * Returns an object list
	 *
	 * @param   \JDatabaseQuery  $query       The query
	 * @param   int              $limitstart  Offset
	 * @param   int              $limit       The number of records
	 *
	 * @return  array
	 */
	protected function _getList($query, $limitstart = 0, $limit = 0)
	{
		$listOrder = $this->getState('list.ordering', 'a.position');
		$listDirn  = $this->getState('list.direction', 'asc');

// If ordering by fields that need translate we need to sort the array of objects after translating them.
		if (in_array($listOrder, array('pages', 'name')))
		{
			// Fetch the results.
			$this->_db->setQuery($query);
			$result = $this->_db->loadObjectList();

// Translate the results.
			$this->translate($result);

// Sort the array of translated objects.
			$result = ArrayHelper::sortObjects($result, $listOrder, strtolower($listDirn) == 'desc' ? -1 : 1, true, true);

// Process pagination.
			$total = count($result);
			$this->cache[$this->getStoreId('getTotal')] = $total;

if ($total < $limitstart)
			{
				$limitstart = 0;
				$this->setState('list.start', 0);
			}

return array_slice($result, $limitstart, $limit ?: null);
		}

// If ordering by fields that doesn't need translate just order the query.
		if ($listOrder === 'a.ordering')
		{
			$query->order($this->_db->quoteName('a.position') . ' ASC')
				->order($this->_db->quoteName($listOrder) . ' ' . $this->_db->escape($listDirn));
		}
		elseif ($listOrder === 'a.position')
		{
			$query->order($this->_db->quoteName($listOrder) . ' ' . $this->_db->escape($listDirn))
				->order($this->_db->quoteName('a.ordering') . ' ASC');
		}
		else
		{
			$query->order($this->_db->quoteName($listOrder) . ' ' . $this->_db->escape($listDirn));
		}

// Process pagination.
		$result = parent::_getList($query, $limitstart, $limit);

// Translate the results.
		$this->translate($result);

return $result;
	}

/**
	 * Translate a list of objects
	 *
	 * @param   array  &$items  The array of objects
	 *
	 * @return  array The array of translated objects
	 */
	protected function translate(&$items)
	{
		$lang = Factory::getLanguage();
		$clientPath = $this->getState('client_id') ? JPATH_ADMINISTRATOR : JPATH_SITE;

foreach ($items as $item)
		{
			$extension = $item->module;
			$source = $clientPath . "/modules/$extension";
			$lang->load("$extension.sys", $clientPath)
				|| $lang->load("$extension.sys", $source);
			$item->name = Text::_($item->name);

if (is_null($item->pages))
			{
				$item->pages = Text::_('JNONE');
			}
			elseif ($item->pages < 0)
			{
				$item->pages = Text::_('COM_MODULES_ASSIGNED_VARIES_EXCEPT');
			}
			elseif ($item->pages > 0)
			{
				$item->pages = Text::_('COM_MODULES_ASSIGNED_VARIES_ONLY');
			}
			else
			{
				$item->pages = Text::_('JALL');
			}
		}
	}

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

// Select the required fields.
		$query->select(
			$this->getState(
				'list.select',
				'a.id, a.title, a.note, a.position, a.module, a.language,' .
					'a.checked_out, a.checked_out_time, a.published AS published, e.enabled AS enabled, a.access, a.ordering, a.publish_up, a.publish_down'
			)
		);

// From modules table.
		$query->from($db->quoteName('#__modules', 'a'));

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

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

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

// Join over the module menus
		$query->select('MIN(mm.menuid) AS pages')
			->join('LEFT', $db->quoteName('#__modules_menu', 'mm') . ' ON ' . $db->quoteName('mm.moduleid') . ' = ' . $db->quoteName('a.id'));

// Join over the extensions
		$query->select($db->quoteName('e.name', 'name'))
			->join('LEFT', $db->quoteName('#__extensions', 'e') . ' ON ' . $db->quoteName('e.element') . ' = ' . $db->quoteName('a.module'));

// Group (careful with PostgreSQL)
		$query->group(
			'a.id, a.title, a.note, a.position, a.module, a.language, a.checked_out, '
			. 'a.checked_out_time, a.published, a.access, a.ordering, l.title, l.image, uc.name, ag.title, e.name, '
			. 'l.lang_code, uc.id, ag.id, mm.moduleid, e.element, a.publish_up, a.publish_down, e.enabled'
		);

// Filter by client.
		$clientId = (int) $this->getState('client_id');
		$query->where($db->quoteName('a.client_id') . ' = :aclientid')
			->where($db->quoteName('e.client_id') . ' = :eclientid')
			->bind(':aclientid', $clientId, ParameterType::INTEGER)
			->bind(':eclientid', $clientId, ParameterType::INTEGER);

// Filter by current user access level.
		$user = Factory::getUser();

// Get the current user for authorisation checks
		if ($user->authorise('core.admin') !== true)
		{
			$groups = $user->getAuthorisedViewLevels();
			$query->whereIn($db->quoteName('a.access'), $groups);
		}

// Filter by access level.
		if ($access = $this->getState('filter.access'))
		{
			$access = (int) $access;
			$query->where($db->quoteName('a.access') . ' = :access')
				->bind(':access', $access, ParameterType::INTEGER);
		}

// Filter by published state.
		$state = $this->getState('filter.state');

if (is_numeric($state))
		{
			$state = (int) $state;
			$query->where($db->quoteName('a.published') . ' = :state')
				->bind(':state', $state, ParameterType::INTEGER);
		}
		elseif ($state === '')
		{
			$query->whereIn($db->quoteName('a.published'), [0, 1]);
		}

// Filter by position.
		if ($position = $this->getState('filter.position'))
		{
			$position = ($position === 'none') ? '' : $position;
			$query->where($db->quoteName('a.position') . ' = :position')
				->bind(':position', $position);
		}

// Filter by module.
		if ($module = $this->getState('filter.module'))
		{
			$query->where($db->quoteName('a.module') . ' = :module')
				->bind(':module', $module);
		}

// Filter by menuitem id (only for site client).
		if ((int) $clientId === 0 && $menuItemId = $this->getState('filter.menuitem'))
		{
			// If user selected the modules not assigned to any page (menu item).
			if ((int) $menuItemId === -1)
			{
				$query->having('MIN(' . $db->quoteName('mm.menuid') . ') IS NULL');
			}
			// If user selected the modules assigned to some particular page (menu item).
			else
			{
				// Modules in "All" pages.
				$subQuery1 = $db->getQuery(true);
				$subQuery1->select('MIN(' . $db->quoteName('menuid') . ')')
					->from($db->quoteName('#__modules_menu'))
					->where($db->quoteName('moduleid') . ' = ' . $db->quoteName('a.id'));

// Modules in "Selected" pages that have the chosen menu item id.
				$menuItemId      = (int) $menuItemId;
				$minusMenuItemId = $menuItemId * -1;
				$subQuery2       = $db->getQuery(true);
				$subQuery2->select($db->quoteName('moduleid'))
					->from($db->quoteName('#__modules_menu'))
					->where($db->quoteName('menuid') . ' = :menuitemid2');

// Modules in "All except selected" pages that doesn't have the chosen menu item id.
				$subQuery3 = $db->getQuery(true);
				$subQuery3->select($db->quoteName('moduleid'))
					->from($db->quoteName('#__modules_menu'))
					->where($db->quoteName('menuid') . ' = :menuitemid3');

// Filter by modules assigned to the selected menu item.
				$query->where('(
					(' . $subQuery1 . ') = 0
					OR ((' . $subQuery1 . ') > 0 AND ' . $db->quoteName('a.id') . ' IN (' . $subQuery2 . '))
					OR ((' . $subQuery1 . ') < 0 AND ' . $db->quoteName('a.id') . ' NOT IN (' . $subQuery3 . '))
					)'
				);
				$query->bind(':menuitemid2', $menuItemId, ParameterType::INTEGER);
				$query->bind(':menuitemid3', $minusMenuItemId, ParameterType::INTEGER);
			}
		}

// Filter by search in title or note or id:.
		$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')
					->bind(':id', $ids, ParameterType::INTEGER);
			}
			else
			{
				$search = '%' . StringHelper::strtolower($search) . '%';
				$query->extendWhere(
					'AND',
					[
						'LOWER(' . $db->quoteName('a.title') . ') LIKE :title',
						'LOWER(' . $db->quoteName('a.note') . ') LIKE :note',
					],
					'OR'
				)
					->bind(':title', $search)
					->bind(':note', $search);
			}
		}

// Filter on the language.
		if ($language = $this->getState('filter.language'))
		{
			if ($language === 'current')
			{
				$language = [Factory::getLanguage()->getTag(), '*'];
				$query->whereIn($db->quoteName('a.language'), $language, ParameterType::STRING);
			}
			else
			{
				$query->where($db->quoteName('a.language') . ' = :language')
					->bind(':language', $language);
			}
		}

return $query;
	}

/**
	 * Manipulate the query to be used to evaluate if this is an Empty State to provide specific conditions for this extension.
	 *
	 * @return DatabaseQuery
	 *
	 * @since 4.0.0
	 */
	protected function getEmptyStateQuery()
	{
		$query = parent::getEmptyStateQuery();

$clientId = (int) $this->getState('client_id');

$query->where($this->_db->quoteName('a.client_id') . ' = :client_id')
			->bind(':client_id', $clientId, ParameterType::INTEGER);

return $query;
	}
}