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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2005 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Installer\Adapter;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Application\ApplicationHelper;
use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Filesystem\Folder;
use Joomla\CMS\Filter\InputFilter;
use Joomla\CMS\Installer\Installer;
use Joomla\CMS\Installer\InstallerAdapter;
use Joomla\CMS\Language\Language;
use Joomla\CMS\Language\LanguageHelper;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Log\Log;
use Joomla\CMS\Table\Table;
use Joomla\CMS\Table\Update;
use Joomla\Database\ParameterType;
use Joomla\Registry\Registry;

/**
 * Language installer
 *
 * @since  3.1
 */
class LanguageAdapter extends InstallerAdapter
{
	/**
	 * Core language pack flag
	 *
	 * @var    boolean
	 * @since  3.0.0
	 */
	protected $core = false;

/**
	 * The language tag for the package
	 *
	 * @var    string
	 * @since  4.0.0
	 */
	protected $tag;

/**
	 * Flag indicating the uninstall process should not run SQL queries
	 *
	 * @var    boolean
	 * @since  4.0.0
	 */
	protected $ignoreUninstallQueries = false;

/**
	 * Method to copy the extension's base files from the `<files>` tag(s) and the manifest file
	 *
	 * @return  void
	 *
	 * @since   3.4
	 * @throws  \RuntimeException
	 */
	protected function copyBaseFiles()
	{
		// TODO - Refactor adapter to use common code
	}

/**
	 * Method to finalise the installation processing
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 * @throws  \RuntimeException
	 */
	protected function finaliseInstall()
	{
		// TODO - Refactor adapter to use common code
	}

/**
	 * Method to finalise the uninstallation processing
	 *
	 * @return  boolean
	 *
	 * @since   4.0.0
	 * @throws  \RuntimeException
	 */
	protected function finaliseUninstall(): bool
	{
		if ($this->ignoreUninstallQueries)
		{
			return false;
		}

$this->resetUserLanguage();

$extensionId = $this->extension->extension_id;

// Remove the schema version
		$db = Factory::getDbo();
		$query = $db->getQuery(true)
			->delete($db->quoteName('#__schemas'))
			->where($db->quoteName('extension_id') . ' = :extension_id')
			->bind(':extension_id', $extensionId, ParameterType::INTEGER);
		$db->setQuery($query);
		$db->execute();

// Clobber any possible pending updates
		$update = Table::getInstance('update');
		$uid    = $update->find(
			[
				'element' => $this->extension->element,
				'type'    => $this->type,
			]
		);

if ($uid)
		{
			$update->delete($uid);
		}

// Clean installed languages cache.
		Factory::getCache()->clean('com_languages');

// Remove the extension table entry
		$this->extension->delete();

return true;
	}

/**
	 * Removes this extension's files
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 * @throws  \RuntimeException
	 */
	protected function removeExtensionFiles()
	{
		$this->parent->removeFiles($this->getManifest()->media);

// Construct the path from the client, the language and the extension element name
		$path = ApplicationHelper::getClientInfo($this->extension->client_id)->path . '/language/' . $this->extension->element;

if (!Folder::delete($path))
		{
			// If deleting failed we'll leave the extension entry in tact just in case
			Log::add(Text::_('JLIB_INSTALLER_ERROR_LANG_UNINSTALL_DIRECTORY'), Log::WARNING, 'jerror');

$this->ignoreUninstallQueries = true;
		}
	}

/**
	 * Method to do any prechecks and setup the install paths for the extension
	 *
	 * @return  void
	 *
	 * @since   3.4
	 */
	protected function setupInstallPaths()
	{
		// TODO - Refactor adapter to use common code
	}

/**
	 * Method to do any prechecks and setup the uninstall job
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 */
	protected function setupUninstall()
	{
		// Grab a copy of the client details
		$client = ApplicationHelper::getClientInfo($this->extension->client_id);

// Check the element isn't blank to prevent nuking the languages directory...just in case
		if (empty($this->extension->element))
		{
			throw new \RuntimeException(Text::_('JLIB_INSTALLER_ERROR_LANG_UNINSTALL_ELEMENT_EMPTY'));
		}

// Verify that it's not the default language for that client
		$params = ComponentHelper::getParams('com_languages');

if ($params->get($client->name) === $this->extension->element)
		{
			throw new \RuntimeException(Text::_('JLIB_INSTALLER_ERROR_LANG_UNINSTALL_DEFAULT'));
		}

// Construct the path from the client, the language and the extension element name
		$path = $client->path . '/language/' . $this->extension->element;

// Get the package manifest object and remove media
		$this->parent->setPath('source', $path);

// Check it exists
		if (!Folder::exists($path))
		{
			// If the folder doesn't exist lets just nuke the row as well and presume the user killed it for us
			$this->extension->delete();

throw new \RuntimeException(Text::_('JLIB_INSTALLER_ERROR_LANG_UNINSTALL_PATH_EMPTY'));
		}

// We do findManifest to avoid problem when uninstalling a list of extension: getManifest cache its manifest file
		$this->parent->findManifest();
		$this->setManifest($this->parent->getManifest());
	}

/**
	 * Method to store the extension to the database
	 *
	 * @return  void
	 *
	 * @since   3.4
	 * @throws  \RuntimeException
	 */
	protected function storeExtension()
	{
		// TODO - Refactor adapter to use common code
	}

/**
	 * Custom install method
	 *
	 * Note: This behaves badly due to hacks made in the middle of 1.5.x to add
	 * the ability to install multiple distinct packs in one install. The
	 * preferred method is to use a package to install multiple language packs.
	 *
	 * @return  boolean|integer  The extension ID on success, boolean false on failure
	 *
	 * @since   3.1
	 */
	public function install()
	{
		$source = $this->parent->getPath('source');

if (!$source)
		{
			$this->parent
				->setPath(
					'source',
					ApplicationHelper::getClientInfo($this->parent->extension->client_id)->path . '/language/' . $this->parent->extension->element
				);
		}

$this->setManifest($this->parent->getManifest());

// Get the client application target
		if ($cname = (string) $this->getManifest()->attributes()->client)
		{
			// Attempt to map the client to a base path
			$client = ApplicationHelper::getClientInfo($cname, true);

if ($client === null)
			{
				$this->parent->abort(Text::sprintf('JLIB_INSTALLER_ABORT', Text::sprintf('JLIB_INSTALLER_ERROR_UNKNOWN_CLIENT_TYPE', $cname)));

return false;
			}

$basePath = $client->path;
			$clientId = $client->id;
			$element  = $this->getManifest()->files;

return $this->_install($cname, $basePath, $clientId, $element);
		}
		else
		{
			// No client attribute was found so we assume the site as the client
			$cname    = 'site';
			$basePath = JPATH_SITE;
			$clientId = 0;
			$element  = $this->getManifest()->files;

return $this->_install($cname, $basePath, $clientId, $element);
		}
	}

/**
	 * Install function that is designed to handle individual clients
	 *
	 * @param   string   $cname     Cname @todo: not used
	 * @param   string   $basePath  The base name.
	 * @param   integer  $clientId  The client id.
	 * @param   object   &$element  The XML element.
	 *
	 * @return  boolean|integer  The extension ID on success, boolean false on failure
	 *
	 * @since   3.1
	 */
	protected function _install($cname, $basePath, $clientId, &$element)
	{
		$this->setManifest($this->parent->getManifest());

// Get the language name
		// Set the extensions name
		$this->name = InputFilter::getInstance()->clean((string) $this->getManifest()->name, 'cmd');

// Get the Language tag [ISO tag, eg. en-GB]
		$tag = (string) $this->getManifest()->tag;

// Check if we found the tag - if we didn't, we may be trying to install from an older language package
		if (!$tag)
		{
			$this->parent->abort(Text::sprintf('JLIB_INSTALLER_ABORT', Text::_('JLIB_INSTALLER_ERROR_NO_LANGUAGE_TAG')));

return false;
		}

$this->tag = $tag;

// Set the language installation path
		$this->parent->setPath('extension_site', $basePath . '/language/' . $tag);

// Do we have a meta file in the file list?  In other words... is this a core language pack?
		if ($element && \count($element->children()))
		{
			$files = $element->children();

foreach ($files as $file)
			{
				if ((string) $file->attributes()->file === 'meta')
				{
					$this->core = true;
					break;
				}
			}
		}

// If the language directory does not exist, let's create it
		$created = false;

if (!file_exists($this->parent->getPath('extension_site')))
		{
			if (!$created = Folder::create($this->parent->getPath('extension_site')))
			{
				$this->parent
					->abort(
						Text::sprintf(
							'JLIB_INSTALLER_ABORT',
							Text::sprintf('JLIB_INSTALLER_ERROR_CREATE_FOLDER_FAILED', $this->parent->getPath('extension_site'))
						)
					);

return false;
			}
		}
		else
		{
			// Look for an update function or update tag
			$updateElement = $this->getManifest()->update;

// Upgrade manually set or update tag detected
			if ($updateElement || $this->parent->isUpgrade())
			{
				// Transfer control to the update function
				return $this->update();
			}
			elseif (!$this->parent->isOverwrite())
			{
				// Overwrite is set
				// We didn't have overwrite set, find an update function or find an update tag so lets call it safe
				if (file_exists($this->parent->getPath('extension_site')))
				{
					// If the site exists say so.
					Log::add(
						Text::sprintf('JLIB_INSTALLER_ABORT', Text::sprintf('JLIB_INSTALLER_ERROR_FOLDER_IN_USE', $this->parent->getPath('extension_site'))),
						Log::WARNING, 'jerror'
					);
				}
				elseif (file_exists($this->parent->getPath('extension_administrator')))
				{
					// If the admin exists say so.
					Log::add(
						Text::sprintf('JLIB_INSTALLER_ABORT',
							Text::sprintf('JLIB_INSTALLER_ERROR_FOLDER_IN_USE', $this->parent->getPath('extension_administrator'))
						),
						Log::WARNING, 'jerror'
					);
				}
				else
				{
					// If the api exists say so.
					Log::add(
						Text::sprintf('JLIB_INSTALLER_ABORT',
							Text::sprintf('JLIB_INSTALLER_ERROR_FOLDER_IN_USE', $this->parent->getPath('extension_api'))
						),
						Log::WARNING, 'jerror'
					);
				}

return false;
			}
		}

/*
		 * If we created the language directory we will want to remove it if we
		 * have to roll back the installation, so let's add it to the installation
		 * step stack
		 */
		if ($created)
		{
			$this->parent->pushStep(array('type' => 'folder', 'path' => $this->parent->getPath('extension_site')));
		}

// Copy all the necessary files
		if ($this->parent->parseFiles($element) === false)
		{
			// Install failed, rollback changes
			$this->parent->abort();

return false;
		}

// Parse optional tags
		$this->parent->parseMedia($this->getManifest()->media);

// Get the language description
		$description = (string) $this->getManifest()->description;

if ($description)
		{
			$this->parent->set('message', Text::_($description));
		}
		else
		{
			$this->parent->set('message', '');
		}

// Add an entry to the extension table with a whole heap of defaults
		$row = Table::getInstance('extension');
		$row->set('name', $this->name);
		$row->set('type', 'language');
		$row->set('element', $this->tag);
		$row->set('changelogurl', (string) $this->getManifest()->changelogurl);

// There is no folder for languages
		$row->set('folder', '');
		$row->set('enabled', 1);
		$row->set('protected', 0);
		$row->set('access', 0);
		$row->set('client_id', $clientId);
		$row->set('params', $this->parent->getParams());
		$row->set('manifest_cache', $this->parent->generateManifestCache());

if (!$row->check() || !$row->store())
		{
			// Install failed, roll back changes
			$this->parent->abort(Text::sprintf('JLIB_INSTALLER_ABORT', $row->getError()));

return false;
		}

if ((int) $clientId === 0)
		{
			$this->createContentLanguage($this->tag);
		}

// Clobber any possible pending updates
		/** @var Update $update */
		$update = Table::getInstance('update');
		$uid = $update->find(array('element' => $this->tag, 'type' => 'language', 'folder' => ''));

if ($uid)
		{
			$update->delete($uid);
		}

// Clean installed languages cache.
		Factory::getCache()->clean('com_languages');

return $row->get('extension_id');
	}

/**
	 * Gets a unique language SEF string.
	 *
	 * This function checks other existing language with the same code, if they exist provides a unique SEF name.
	 * For instance: en-GB, en-US and en-AU will share the same SEF code by default: www.mywebsite.com/en/
	 * To avoid this conflict, this function creates an specific SEF in case of existing conflict:
	 * For example: www.mywebsite.com/en-au/
	 *
	 * @param   string  $itemLanguageTag  Language Tag.
	 *
	 * @return  string
	 *
	 * @since   3.7.0
	 */
	protected function getSefString($itemLanguageTag)
	{
		$langs               = explode('-', $itemLanguageTag);
		$prefixToFind        = $langs[0];
		$numberPrefixesFound = 0;

// Get the sef value of all current content languages.
		$db = Factory::getDbo();
		$query = $db->getQuery(true)
			->select($db->quoteName('sef'))
			->from($db->quoteName('#__languages'));
		$db->setQuery($query);

$siteLanguages = $db->loadObjectList();

foreach ($siteLanguages as $siteLang)
		{
			if ($siteLang->sef === $prefixToFind)
			{
				$numberPrefixesFound++;
			}
		}

return $numberPrefixesFound === 0 ? $prefixToFind : strtolower($itemLanguageTag);
	}

/**
	 * Custom update method
	 *
	 * @return  boolean  True on success, false on failure
	 *
	 * @since   3.1
	 */
	public function update()
	{
		$xml = $this->parent->getManifest();

$this->setManifest($xml);

$cname = $xml->attributes()->client;

// Attempt to map the client to a base path
		$client = ApplicationHelper::getClientInfo($cname, true);

if ($client === null || (empty($cname) && $cname !== 0))
		{
			$this->parent->abort(Text::sprintf('JLIB_INSTALLER_ABORT', Text::sprintf('JLIB_INSTALLER_ERROR_UNKNOWN_CLIENT_TYPE', $cname)));

return false;
		}

$basePath = $client->path;
		$clientId = $client->id;

// Get the language name
		// Set the extensions name
		$name = (string) $this->getManifest()->name;
		$name = InputFilter::getInstance()->clean($name, 'cmd');
		$this->name = $name;

// Get the Language tag [ISO tag, eg. en-GB]
		$tag = (string) $xml->tag;

return false;
		}

$this->tag = $tag;

// Set the language installation path
		$this->parent->setPath('extension_site', $basePath . '/language/' . $tag);

// Do we have a meta file in the file list?  In other words... is this a core language pack?
		if (\count($xml->files->children()))
		{
			foreach ($xml->files->children() as $file)
			{
				if ((string) $file->attributes()->file === 'meta')
				{
					$this->core = true;
					break;
				}
			}
		}

// Copy all the necessary files
		if ($this->parent->parseFiles($xml->files) === false)
		{
			// Install failed, rollback changes
			$this->parent->abort();

return false;
		}

// Parse optional tags
		$this->parent->parseMedia($xml->media);

// Get the language description and set it as message
		$this->parent->set('message', (string) $xml->description);

/**
		 * ---------------------------------------------------------------------------------------------
		 * Finalization and Cleanup Section
		 * ---------------------------------------------------------------------------------------------
		 */

// Clobber any possible pending updates
		$update = Table::getInstance('update');
		$uid = $update->find(array('element' => $this->tag, 'type' => 'language', 'client_id' => $clientId));

if ($uid)
		{
			$update->delete($uid);
		}

// Update an entry to the extension table
		$row = Table::getInstance('extension');
		$eid = $row->find(array('element' => $this->tag, 'type' => 'language', 'client_id' => $clientId));

if ($eid)
		{
			$row->load($eid);
		}
		else
		{
			// Set the defaults

// There is no folder for language
			$row->set('folder', '');
			$row->set('enabled', 1);
			$row->set('protected', 0);
			$row->set('access', 0);
			$row->set('client_id', $clientId);
			$row->set('params', $this->parent->getParams());
		}

$row->set('name', $this->name);
		$row->set('type', 'language');
		$row->set('element', $this->tag);
		$row->set('manifest_cache', $this->parent->generateManifestCache());
		$row->set('changelogurl', (string) $this->getManifest()->changelogurl);

// Clean installed languages cache.
		Factory::getCache()->clean('com_languages');

if (!$row->check() || !$row->store())
		{
			// Install failed, roll back changes
			$this->parent->abort(Text::sprintf('JLIB_INSTALLER_ABORT', $row->getError()));

return false;
		}

if ($clientId === 0)
		{
			$this->createContentLanguage($this->tag);
		}

return $row->get('extension_id');
	}

/**
	 * Custom discover method
	 * Finds language files
	 *
	 * @return  boolean  True on success
	 *
	 * @since  3.1
	 */
	public function discover()
	{
		$results = array();
		$clients = [0 => JPATH_SITE, 1 => JPATH_ADMINISTRATOR, 3 => JPATH_API];

foreach ($clients as $clientId => $basePath)
		{
			$languages = Folder::folders($basePath . '/language');

foreach ($languages as $language)
			{
				$manifestfile = $basePath . '/language/' . $language . '/langmetadata.xml';

if (!is_file($manifestfile))
				{
					$manifestfile = $basePath . '/language/' . $language . '/' . $language . '.xml';

if (!is_file($manifestfile))
					{
						continue;
					}
				}

$manifest_details = Installer::parseXMLInstallFile($manifestfile);
				$extension = Table::getInstance('extension');
				$extension->set('type', 'language');
				$extension->set('client_id', $clientId);
				$extension->set('element', $language);
				$extension->set('folder', '');
				$extension->set('name', $language);
				$extension->set('state', -1);
				$extension->set('manifest_cache', json_encode($manifest_details));
				$extension->set('params', '{}');
				$results[] = $extension;
			}
		}

return $results;
	}

/**
	 * Custom discover install method
	 * Basically updates the manifest cache and leaves everything alone
	 *
	 * @return  integer  The extension id
	 *
	 * @since   3.1
	 */
	public function discover_install()
	{
		// Need to find to find where the XML file is since we don't store this normally
		$client                 = ApplicationHelper::getClientInfo($this->parent->extension->client_id);
		$short_element          = $this->parent->extension->element;
		$manifestPath           = $client->path . '/language/' . $short_element . '/langmetadata.xml';

if (!is_file($manifestPath))
		{
			$manifestPath = $client->path . '/language/' . $short_element . '/' . $short_element . '.xml';
		}

$this->parent->manifest = $this->parent->isManifest($manifestPath);
		$this->parent->setPath('manifest', $manifestPath);
		$this->parent->setPath('source', $client->path . '/language/' . $short_element);
		$this->parent->setPath('extension_root', $this->parent->getPath('source'));
		$manifest_details                        = Installer::parseXMLInstallFile($this->parent->getPath('manifest'));
		$this->parent->extension->manifest_cache = json_encode($manifest_details);
		$this->parent->extension->state          = 0;
		$this->parent->extension->name           = $manifest_details['name'];
		$this->parent->extension->enabled        = 1;

// @todo remove code: $this->parent->extension->params = $this->parent->getParams();
		try
		{
			$this->parent->extension->check();
			$this->parent->extension->store();
		}
		catch (\RuntimeException $e)
		{
			Log::add(Text::_('JLIB_INSTALLER_ERROR_LANG_DISCOVER_STORE_DETAILS'), Log::WARNING, 'jerror');

return false;
		}

if ($client->id === 0)
		{
			$this->createContentLanguage($short_element);
		}

// Clean installed languages cache.
		Factory::getCache()->clean('com_languages');

return $this->parent->extension->get('extension_id');
	}

/**
	 * Refreshes the extension table cache
	 *
	 * @return  boolean result of operation, true if updated, false on failure
	 *
	 * @since   3.1
	 */
	public function refreshManifestCache()
	{
		$client       = ApplicationHelper::getClientInfo($this->parent->extension->client_id);
		$manifestPath = $client->path . '/language/' . $this->parent->extension->element . '/langmetadata.xml';

if (!is_file($manifestPath))
		{
			$manifestPath = $client->path . '/language/' . $this->parent->extension->element . '/' . $this->parent->extension->element . '.xml';
		}

$this->parent->manifest = $this->parent->isManifest($manifestPath);
		$this->parent->setPath('manifest', $manifestPath);
		$manifest_details                        = Installer::parseXMLInstallFile($this->parent->getPath('manifest'));
		$this->parent->extension->manifest_cache = json_encode($manifest_details);
		$this->parent->extension->name           = $manifest_details['name'];

if ($this->parent->extension->store())
		{
			return true;
		}

Log::add(Text::_('JLIB_INSTALLER_ERROR_MOD_REFRESH_MANIFEST_CACHE'), Log::WARNING, 'jerror');

return false;
	}

/**
	 * Resets user language to default language
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 */
	private function resetUserLanguage(): void
	{
		$client = ApplicationHelper::getClientInfo($this->extension->client_id);

if ($client->name !== 'site' && $client->name !== 'administrator')
		{
			return;
		}

// Setting the language of users which have this language as the default language
		$db = Factory::getDbo();
		$query = $db->getQuery(true)
			->select(
				[
					$db->quoteName('id'),
					$db->quoteName('params'),
				]
			)
			->from($db->quoteName('#__users'));
		$db->setQuery($query);
		$users = $db->loadObjectList();

if ($client->name === 'administrator')
		{
			$param_name = 'admin_language';
		}
		else
		{
			$param_name = 'language';
		}

$count = 0;

// Prepare the query.
		$query = $db->getQuery(true)
			->update($db->quoteName('#__users'))
			->set($db->quoteName('params') . ' = :registry')
			->where($db->quoteName('id') . ' = :userId')
			->bind(':registry', $registry)
			->bind(':userId', $userId, ParameterType::INTEGER);
		$db->setQuery($query);

foreach ($users as $user)
		{
			$registry = new Registry($user->params);

if ($registry->get($param_name) === $this->extension->element)
			{
				// Update query parameters.
				$registry->set($param_name, '');
				$userId = $user->id;

$db->execute();
				$count++;
			}
		}

if (!empty($count))
		{
			Log::add(Text::plural('JLIB_INSTALLER_NOTICE_LANG_RESET_USERS', $count), Log::NOTICE, 'jerror');
		}
	}

/**
	 * Create an unpublished content language.
	 *
	 * @param  $tag  string  The language tag
	 *
	 * @throws \Exception
	 * @since   4.0.0
	 */
	protected function createContentLanguage($tag)
	{
		$tableLanguage = Table::getInstance('language');

// Check if content language already exists.
		if ($tableLanguage->load(array('lang_code' => $tag)))
		{
			return;
		}

$manifestfile = JPATH_SITE . '/language/' . $tag . '/langmetadata.xml';

if (!is_file($manifestfile))
		{
			$manifestfile = JPATH_SITE . '/language/' . $tag . '/' . $tag . '.xml';
		}

// Load the site language manifest.
		$siteLanguageManifest = LanguageHelper::parseXMLLanguageFile($manifestfile);

// Set the content language title as the language metadata name.
		$contentLanguageTitle = $siteLanguageManifest['name'];

// Set, as fallback, the content language native title to the language metadata name.
		$contentLanguageNativeTitle = $contentLanguageTitle;

// If exist, load the native title from the language xml metadata.
		if (isset($siteLanguageManifest['nativeName']) && $siteLanguageManifest['nativeName'])
		{
			$contentLanguageNativeTitle = $siteLanguageManifest['nativeName'];
		}

// Try to load a language string from the installation language var. Will be removed in 4.0.
		if ($contentLanguageNativeTitle === $contentLanguageTitle)
		{
			$manifestfile = JPATH_INSTALLATION . '/language/' . $tag . '/langmetadata.xml';

if (!is_file($manifestfile))
			{
				$manifestfile = JPATH_INSTALLATION . '/language/' . $tag . '/' . $tag . '.xml';
			}

if (file_exists($manifestfile))
			{
				$installationLanguage = new Language($tag);
				$installationLanguage->load('', JPATH_INSTALLATION);

if ($installationLanguage->hasKey('INSTL_DEFAULTLANGUAGE_NATIVE_LANGUAGE_NAME'))
				{
					// Make sure it will not use the en-GB fallback.
					$defaultLanguage = new Language('en-GB');
					$defaultLanguage->load('', JPATH_INSTALLATION);

$defaultLanguageNativeTitle      = $defaultLanguage->_('INSTL_DEFAULTLANGUAGE_NATIVE_LANGUAGE_NAME');
					$installationLanguageNativeTitle = $installationLanguage->_('INSTL_DEFAULTLANGUAGE_NATIVE_LANGUAGE_NAME');

if ($defaultLanguageNativeTitle !== $installationLanguageNativeTitle)
					{
						$contentLanguageNativeTitle = $installationLanguage->_('INSTL_DEFAULTLANGUAGE_NATIVE_LANGUAGE_NAME');
					}
				}
			}
		}

// Prepare language data for store.
		$languageData = array(
			'lang_id'      => 0,
			'lang_code'    => $tag,
			'title'        => $contentLanguageTitle,
			'title_native' => $contentLanguageNativeTitle,
			'sef'          => $this->getSefString($tag),
			'image'        => strtolower(str_replace('-', '_', $tag)),
			'published'    => 0,
			'ordering'     => 0,
			'access'       => (int) Factory::getApplication()->get('access', 1),
			'description'  => '',
			'metadesc'     => '',
			'sitename'     => '',
		);

if (!$tableLanguage->bind($languageData) || !$tableLanguage->check() || !$tableLanguage->store() || !$tableLanguage->reorder())
		{
			Log::add(
				Text::sprintf('JLIB_INSTALLER_WARNING_UNABLE_TO_INSTALL_CONTENT_LANGUAGE', $siteLanguageManifest['name'], $tableLanguage->getError()),
				Log::NOTICE,
				'jerror'
			);
		}
	}
}