418 lines
11 KiB
PHP
418 lines
11 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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* @copyright 2016 Roeland Jago Douma <roeland@famdouma.nl>
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* @copyright 2016 Lukas Reschke <lukas@statuscode.ch>
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*
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\L10N;
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use OCP\IConfig;
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use OCP\IRequest;
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use OCP\IUserSession;
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use OCP\L10N\IFactory;
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/**
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* A factory that generates language instances
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*/
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class Factory implements IFactory {
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/** @var string */
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protected $requestLanguage = '';
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/**
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* cached instances
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* @var array Structure: Lang => App => \OCP\IL10N
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*/
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protected $instances = [];
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/**
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* @var array Structure: App => string[]
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*/
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protected $availableLanguages = [];
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/**
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* @var array Structure: string => callable
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*/
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protected $pluralFunctions = [];
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/** @var IConfig */
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protected $config;
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/** @var IRequest */
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protected $request;
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/** @var IUserSession */
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protected $userSession;
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/** @var string */
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protected $serverRoot;
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/**
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* @param IConfig $config
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* @param IRequest $request
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* @param IUserSession $userSession
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* @param string $serverRoot
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*/
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public function __construct(IConfig $config,
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IRequest $request,
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IUserSession $userSession,
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$serverRoot) {
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$this->config = $config;
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$this->request = $request;
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$this->userSession = $userSession;
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$this->serverRoot = $serverRoot;
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}
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/**
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* Get a language instance
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*
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* @param string $app
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* @param string|null $lang
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* @return \OCP\IL10N
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*/
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public function get($app, $lang = null) {
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$app = \OC_App::cleanAppId($app);
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if ($lang !== null) {
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$lang = str_replace(array('\0', '/', '\\', '..'), '', (string) $lang);
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}
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$forceLang = $this->config->getSystemValue('force_language', false);
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if (is_string($forceLang)) {
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$lang = $forceLang;
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}
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if ($lang === null || !$this->languageExists($app, $lang)) {
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$lang = $this->findLanguage($app);
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}
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if (!isset($this->instances[$lang][$app])) {
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$this->instances[$lang][$app] = new L10N(
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$this, $app, $lang,
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$this->getL10nFilesForApp($app, $lang)
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);
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}
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return $this->instances[$lang][$app];
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}
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/**
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* Find the best language
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*
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* @param string|null $app App id or null for core
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* @return string language If nothing works it returns 'en'
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*/
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public function findLanguage($app = null) {
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if ($this->requestLanguage !== '' && $this->languageExists($app, $this->requestLanguage)) {
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return $this->requestLanguage;
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}
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/**
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* At this point Nextcloud might not yet be installed and thus the lookup
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* in the preferences table might fail. For this reason we need to check
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* whether the instance has already been installed
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*
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* @link https://github.com/owncloud/core/issues/21955
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*/
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if($this->config->getSystemValue('installed', false)) {
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$userId = !is_null($this->userSession->getUser()) ? $this->userSession->getUser()->getUID() : null;
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if(!is_null($userId)) {
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$userLang = $this->config->getUserValue($userId, 'core', 'lang', null);
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} else {
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$userLang = null;
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}
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} else {
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$userId = null;
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$userLang = null;
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}
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if ($userLang) {
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$this->requestLanguage = $userLang;
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if ($this->languageExists($app, $userLang)) {
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return $userLang;
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}
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}
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try {
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// Try to get the language from the Request
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$lang = $this->getLanguageFromRequest($app);
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if ($userId !== null && $app === null && !$userLang) {
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$this->config->setUserValue($userId, 'core', 'lang', $lang);
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}
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return $lang;
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} catch (LanguageNotFoundException $e) {
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// Finding language from request failed fall back to default language
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$defaultLanguage = $this->config->getSystemValue('default_language', false);
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if ($defaultLanguage !== false && $this->languageExists($app, $defaultLanguage)) {
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return $defaultLanguage;
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}
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}
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// We could not find any language so fall back to english
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return 'en';
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}
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/**
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* Find all available languages for an app
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*
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* @param string|null $app App id or null for core
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* @return array an array of available languages
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*/
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public function findAvailableLanguages($app = null) {
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$key = $app;
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if ($key === null) {
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$key = 'null';
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}
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// also works with null as key
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if (!empty($this->availableLanguages[$key])) {
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return $this->availableLanguages[$key];
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}
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$available = ['en']; //english is always available
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$dir = $this->findL10nDir($app);
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if (is_dir($dir)) {
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$files = scandir($dir);
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if ($files !== false) {
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foreach ($files as $file) {
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if (substr($file, -5) === '.json' && substr($file, 0, 4) !== 'l10n') {
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$available[] = substr($file, 0, -5);
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}
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}
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}
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}
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// merge with translations from theme
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$theme = $this->config->getSystemValue('theme');
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if (!empty($theme)) {
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$themeDir = $this->serverRoot . '/themes/' . $theme . substr($dir, strlen($this->serverRoot));
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if (is_dir($themeDir)) {
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$files = scandir($themeDir);
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if ($files !== false) {
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foreach ($files as $file) {
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if (substr($file, -5) === '.json' && substr($file, 0, 4) !== 'l10n') {
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$available[] = substr($file, 0, -5);
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}
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}
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}
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}
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}
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$this->availableLanguages[$key] = $available;
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return $available;
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}
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/**
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* @param string|null $app App id or null for core
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* @param string $lang
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* @return bool
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*/
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public function languageExists($app, $lang) {
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if ($lang === 'en') {//english is always available
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return true;
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}
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$languages = $this->findAvailableLanguages($app);
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return array_search($lang, $languages) !== false;
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}
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/**
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* @param string|null $app
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* @return string
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* @throws LanguageNotFoundException
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*/
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private function getLanguageFromRequest($app) {
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$header = $this->request->getHeader('ACCEPT_LANGUAGE');
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if ($header) {
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$available = $this->findAvailableLanguages($app);
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// E.g. make sure that 'de' is before 'de_DE'.
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sort($available);
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$preferences = preg_split('/,\s*/', strtolower($header));
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foreach ($preferences as $preference) {
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list($preferred_language) = explode(';', $preference);
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$preferred_language = str_replace('-', '_', $preferred_language);
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foreach ($available as $available_language) {
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if ($preferred_language === strtolower($available_language)) {
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return $available_language;
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}
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}
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// Fallback from de_De to de
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foreach ($available as $available_language) {
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if (substr($preferred_language, 0, 2) === $available_language) {
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return $available_language;
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}
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}
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}
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}
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throw new LanguageNotFoundException();
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}
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/**
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* Checks if $sub is a subdirectory of $parent
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*
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* @param string $sub
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* @param string $parent
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* @return bool
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*/
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private function isSubDirectory($sub, $parent) {
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// Check whether $sub contains no ".."
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if(strpos($sub, '..') !== false) {
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return false;
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}
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// Check whether $sub is a subdirectory of $parent
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if (strpos($sub, $parent) === 0) {
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return true;
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}
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return false;
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}
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/**
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* Get a list of language files that should be loaded
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*
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* @param string $app
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* @param string $lang
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* @return string[]
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*/
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// FIXME This method is only public, until OC_L10N does not need it anymore,
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// FIXME This is also the reason, why it is not in the public interface
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public function getL10nFilesForApp($app, $lang) {
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$languageFiles = [];
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$i18nDir = $this->findL10nDir($app);
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$transFile = strip_tags($i18nDir) . strip_tags($lang) . '.json';
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if (($this->isSubDirectory($transFile, $this->serverRoot . '/core/l10n/')
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|| $this->isSubDirectory($transFile, $this->serverRoot . '/lib/l10n/')
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|| $this->isSubDirectory($transFile, $this->serverRoot . '/settings/l10n/')
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|| $this->isSubDirectory($transFile, \OC_App::getAppPath($app) . '/l10n/')
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)
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&& file_exists($transFile)) {
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// load the translations file
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$languageFiles[] = $transFile;
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}
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// merge with translations from theme
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$theme = $this->config->getSystemValue('theme');
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if (!empty($theme)) {
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$transFile = $this->serverRoot . '/themes/' . $theme . substr($transFile, strlen($this->serverRoot));
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if (file_exists($transFile)) {
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$languageFiles[] = $transFile;
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}
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}
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return $languageFiles;
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}
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/**
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* find the l10n directory
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*
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* @param string $app App id or empty string for core
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* @return string directory
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*/
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protected function findL10nDir($app = null) {
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if (in_array($app, ['core', 'lib', 'settings'])) {
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if (file_exists($this->serverRoot . '/' . $app . '/l10n/')) {
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return $this->serverRoot . '/' . $app . '/l10n/';
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}
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} else if ($app && \OC_App::getAppPath($app) !== false) {
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// Check if the app is in the app folder
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return \OC_App::getAppPath($app) . '/l10n/';
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}
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return $this->serverRoot . '/core/l10n/';
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}
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/**
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* Creates a function from the plural string
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*
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* Parts of the code is copied from Habari:
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* https://github.com/habari/system/blob/master/classes/locale.php
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* @param string $string
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* @return string
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*/
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public function createPluralFunction($string) {
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if (isset($this->pluralFunctions[$string])) {
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return $this->pluralFunctions[$string];
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}
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if (preg_match( '/^\s*nplurals\s*=\s*(\d+)\s*;\s*plural=(.*)$/u', $string, $matches)) {
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// sanitize
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$nplurals = preg_replace( '/[^0-9]/', '', $matches[1] );
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$plural = preg_replace( '#[^n0-9:\(\)\?\|\&=!<>+*/\%-]#', '', $matches[2] );
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$body = str_replace(
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array( 'plural', 'n', '$n$plurals', ),
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array( '$plural', '$n', '$nplurals', ),
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'nplurals='. $nplurals . '; plural=' . $plural
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);
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// add parents
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// important since PHP's ternary evaluates from left to right
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$body .= ';';
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$res = '';
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$p = 0;
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for($i = 0; $i < strlen($body); $i++) {
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$ch = $body[$i];
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switch ( $ch ) {
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case '?':
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$res .= ' ? (';
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$p++;
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break;
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case ':':
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$res .= ') : (';
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break;
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case ';':
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$res .= str_repeat( ')', $p ) . ';';
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$p = 0;
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break;
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default:
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$res .= $ch;
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}
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}
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$body = $res . 'return ($plural>=$nplurals?$nplurals-1:$plural);';
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$function = create_function('$n', $body);
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$this->pluralFunctions[$string] = $function;
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return $function;
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} else {
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// default: one plural form for all cases but n==1 (english)
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$function = create_function(
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'$n',
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'$nplurals=2;$plural=($n==1?0:1);return ($plural>=$nplurals?$nplurals-1:$plural);'
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);
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$this->pluralFunctions[$string] = $function;
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return $function;
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}
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}
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}
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