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<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_installer
 * @copyright   (C) 2006 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Installer\Administrator\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\Http\HttpFactory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
use Joomla\CMS\MVC\Model\ListModel;
use Joomla\String\StringHelper;

/**
 * Languages Installer Model
 *
 * @since  2.5.7
 */
class LanguagesModel extends ListModel
{
	/**
	 * Language count
	 *
	 * @var     integer
	 * @since   3.7.0
	 */
	private $languageCount;

/**
	 * Constructor.
	 *
	 * @param   array                $config   An optional associative array of configuration settings.
	 * @param   MVCFactoryInterface  $factory  The factory.
	 *
	 * @see     \Joomla\CMS\MVC\Model\ListModel
	 * @since   1.6
	 */
	public function __construct($config = array(), MVCFactoryInterface $factory = null)
	{
		if (empty($config['filter_fields']))
		{
			$config['filter_fields'] = array(
				'name',
				'element',
			);
		}

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

/**
	 * Get the Update Site
	 *
	 * @since   3.7.0
	 *
	 * @return  string  The URL of the Accredited Languagepack Updatesite XML
	 */
	private function getUpdateSite()
	{
		$db    = $this->getDbo();
		$query = $db->getQuery(true)
			->select($db->quoteName('us.location'))
			->from($db->quoteName('#__extensions', 'e'))
			->where($db->quoteName('e.type') . ' = ' . $db->quote('package'))
			->where($db->quoteName('e.element') . ' = ' . $db->quote('pkg_en-GB'))
			->where($db->quoteName('e.client_id') . ' = 0')
			->join(
				'LEFT', $db->quoteName('#__update_sites_extensions', 'use')
				. ' ON ' . $db->quoteName('use.extension_id') . ' = ' . $db->quoteName('e.extension_id')
			)
			->join(
				'LEFT', $db->quoteName('#__update_sites', 'us')
				. ' ON ' . $db->quoteName('us.update_site_id') . ' = ' . $db->quoteName('use.update_site_id')
			);

return $db->setQuery($query)->loadResult();
	}

/**
	 * Method to get an array of data items.
	 *
	 * @return  mixed  An array of data items on success, false on failure.
	 *
	 * @since   3.7.0
	 */
	public function getItems()
	{
		// Get a storage key.
		$store = $this->getStoreId();

// Try to load the data from internal storage.
		if (isset($this->cache[$store]))
		{
			return $this->cache[$store];
		}

try
		{
			// Load the list items and add the items to the internal cache.
			$this->cache[$store] = $this->getLanguages();
		}
		catch (\RuntimeException $e)
		{
			$this->setError($e->getMessage());

return false;
		}

return $this->cache[$store];
	}

/**
	 * Gets an array of objects from the updatesite.
	 *
	 * @return  object[]  An array of results.
	 *
	 * @since   3.0
	 * @throws  \RuntimeException
	 */
	protected function getLanguages()
	{
		$updateSite = $this->getUpdateSite();

// Check whether the updateserver is found
		if (empty($updateSite))
		{
			Factory::getApplication()->enqueueMessage(Text::_('COM_INSTALLER_MSG_WARNING_NO_LANGUAGES_UPDATESERVER'), 'warning');

return;
		}

try
		{
			$response = HttpFactory::getHttp()->get($updateSite);
		}
		catch (\RuntimeException $e)
		{
			$response = null;
		}

if ($response === null || $response->code !== 200)
		{
			Factory::getApplication()->enqueueMessage(Text::sprintf('COM_INSTALLER_MSG_ERROR_CANT_CONNECT_TO_UPDATESERVER', $updateSite), 'error');

return;
		}

$updateSiteXML = simplexml_load_string($response->body);
		$languages     = array();
		$search        = strtolower($this->getState('filter.search'));

foreach ($updateSiteXML->extension as $extension)
		{
			$language = new \stdClass;

foreach ($extension->attributes() as $key => $value)
			{
				$language->$key = (string) $value;
			}

if ($search)
			{
				if (strpos(strtolower($language->name), $search) === false
					&& strpos(strtolower($language->element), $search) === false)
				{
					continue;
				}
			}

$languages[$language->name] = $language;
		}

// Workaround for php 5.3
		$that = $this;

// Sort the array by value of subarray
		usort(
			$languages,
			function ($a, $b) use ($that)
			{
				$ordering = $that->getState('list.ordering');

if (strtolower($that->getState('list.direction')) === 'asc')
				{
					return StringHelper::strcmp($a->$ordering, $b->$ordering);
				}
				else
				{
					return StringHelper::strcmp($b->$ordering, $a->$ordering);
				}
			}
		);

// Count the non-paginated list
		$this->languageCount = count($languages);
		$limit               = ($this->getState('list.limit') > 0) ? $this->getState('list.limit') : $this->languageCount;

return array_slice($languages, $this->getStart(), $limit);
	}

/**
	 * Returns a record count for the updatesite.
	 *
	 * @param   \JDatabaseQuery|string  $query  The query.
	 *
	 * @return  integer  Number of rows for query.
	 *
	 * @since   3.7.0
	 */
	protected function _getListCount($query)
	{
		return $this->languageCount;
	}

/**
	 * Method to get a store id based on model configuration state.
	 *
	 * @param   string  $id  A prefix for the store id.
	 *
	 * @return  string  A store id.
	 *
	 * @since   2.5.7
	 */
	protected function getStoreId($id = '')
	{
		// Compile the store id.
		$id .= ':' . $this->getState('filter.search');

return parent::getStoreId($id);
	}

/**
	 * Method to auto-populate the model state.
	 *
	 * Note. Calling getState in this method will result in recursion.
	 *
	 * @param   string  $ordering   list order
	 * @param   string  $direction  direction in the list
	 *
	 * @return  void
	 *
	 * @since   2.5.7
	 */
	protected function populateState($ordering = 'name', $direction = 'asc')
	{
		$this->setState('filter.search', $this->getUserStateFromRequest($this->context . '.filter.search', 'filter_search', '', 'string'));

$this->setState('extension_message', Factory::getApplication()->getUserState('com_installer.extension_message'));

parent::populateState($ordering, $direction);
	}

/**
	 * Method to compare two languages in order to sort them.
	 *
	 * @param   object  $lang1  The first language.
	 * @param   object  $lang2  The second language.
	 *
	 * @return  integer
	 *
	 * @since   3.7.0
	 */
	protected function compareLanguages($lang1, $lang2)
	{
		return strcmp($lang1->name, $lang2->name);
	}
}