529 lines
13 KiB
PHP
529 lines
13 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Frank Karlitschek
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* @author Jakob Sack
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* @copyright 2012 Frank Karlitschek frank@owncloud.org
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* @copyright 2013 Jakob Sack
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*
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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/**
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* This class is for i18n and l10n
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*/
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class OC_L10N implements \OCP\IL10N {
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/**
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* cache
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*/
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protected static $cache = array();
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protected static $availableLanguages = array();
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/**
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* The best language
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*/
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protected static $language = '';
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/**
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* App of this object
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*/
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protected $app;
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/**
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* Language of this object
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*/
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protected $lang;
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/**
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* Translations
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*/
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private $translations = array();
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/**
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* Plural forms (string)
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*/
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private $pluralFormString = 'nplurals=2; plural=(n != 1);';
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/**
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* Plural forms (function)
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*/
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private $pluralFormFunction = null;
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/**
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* get an L10N instance
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* @param string $app
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* @param string|null $lang
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* @return \OC_L10N
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*/
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public static function get($app, $lang=null) {
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if (is_null($lang)) {
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return OC::$server->getL10N($app);
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} else {
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return new \OC_L10N($app, $lang);
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}
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}
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/**
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* The constructor
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* @param string $app app requesting l10n
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* @param string $lang default: null Language
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*
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* If language is not set, the constructor tries to find the right
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* language.
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*/
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public function __construct($app, $lang = null) {
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$this->app = $app;
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$this->lang = $lang;
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}
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/**
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* @param $app
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* @return string
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*/
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public static function setLanguageFromRequest($app = null) {
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if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
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if (is_array($app)) {
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$available = $app;
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} else {
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$available = self::findAvailableLanguages($app);
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}
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// E.g. make sure that 'de' is before 'de_DE'.
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sort($available);
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$preferences = preg_split('/,\s*/', strtolower($_SERVER['HTTP_ACCEPT_LANGUAGE']));
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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($available_language)) {
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if (is_null($app)) {
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self::$language = $available_language;
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}
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return $available_language;
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}
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}
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foreach ($available as $available_language) {
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if (substr($preferred_language, 0, 2) === $available_language) {
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if (is_null($app)) {
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self::$language = $available_language;
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}
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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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// Last try: English
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return 'en';
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}
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/**
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* @param $transFile
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* @param bool $mergeTranslations
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* @return bool
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*/
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public function load($transFile, $mergeTranslations = false) {
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$this->app = true;
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$json = json_decode(file_get_contents($transFile), true);
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if (!is_array($json)) {
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return false;
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}
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$this->pluralFormString = $json['pluralForm'];
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$translations = $json['translations'];
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if ($mergeTranslations) {
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$this->translations = array_merge($this->translations, $translations);
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} else {
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$this->translations = $translations;
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}
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return true;
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}
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protected function init() {
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if ($this->app === true) {
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return;
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}
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$app = OC_App::cleanAppId($this->app);
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$lang = str_replace(array('\0', '/', '\\', '..'), '', $this->lang);
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$this->app = true;
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// Find the right language
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if(is_null($lang) || $lang == '') {
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$lang = self::findLanguage($app);
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}
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// Use cache if possible
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if(array_key_exists($app.'::'.$lang, self::$cache)) {
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$this->translations = self::$cache[$app.'::'.$lang]['t'];
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} else{
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$i18nDir = self::findI18nDir($app);
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$transFile = strip_tags($i18nDir).strip_tags($lang).'.json';
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// Texts are in $i18ndir
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// (Just no need to define date/time format etc. twice)
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if((OC_Helper::isSubDirectory($transFile, OC::$SERVERROOT.'/core/l10n/')
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|| OC_Helper::isSubDirectory($transFile, OC::$SERVERROOT.'/lib/l10n/')
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|| OC_Helper::isSubDirectory($transFile, OC::$SERVERROOT.'/settings')
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|| OC_Helper::isSubDirectory($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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if($this->load($transFile)) {
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//merge with translations from theme
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$theme = \OC::$server->getConfig()->getSystemValue('theme');
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if (!empty($theme)) {
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$transFile = OC::$SERVERROOT.'/themes/'.$theme.substr($transFile, strlen(OC::$SERVERROOT));
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if (file_exists($transFile)) {
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$this->load($transFile, true);
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}
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}
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}
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}
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self::$cache[$app.'::'.$lang]['t'] = $this->translations;
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}
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}
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/**
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* Creates a function that The constructor
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*
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* If language is not set, the constructor tries to find the right
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* language.
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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 $string
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* @return string
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*/
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protected function createPluralFormFunction($string){
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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:$plural);';
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return create_function('$n', $body);
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}
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else {
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// default: one plural form for all cases but n==1 (english)
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return create_function(
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'$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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}
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}
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/**
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* Translating
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* @param string $text The text we need a translation for
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* @param array $parameters default:array() Parameters for sprintf
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* @return \OC_L10N_String Translation or the same text
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*
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* Returns the translation. If no translation is found, $text will be
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* returned.
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*/
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public function t($text, $parameters = array()) {
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return new OC_L10N_String($this, $text, $parameters);
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}
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/**
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* Translating
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* @param string $text_singular the string to translate for exactly one object
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* @param string $text_plural the string to translate for n objects
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* @param integer $count Number of objects
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* @param array $parameters default:array() Parameters for sprintf
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* @return \OC_L10N_String Translation or the same text
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*
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* Returns the translation. If no translation is found, $text will be
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* returned. %n will be replaced with the number of objects.
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*
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* The correct plural is determined by the plural_forms-function
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* provided by the po file.
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*
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*/
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public function n($text_singular, $text_plural, $count, $parameters = array()) {
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$this->init();
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$identifier = "_${text_singular}_::_${text_plural}_";
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if( array_key_exists($identifier, $this->translations)) {
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return new OC_L10N_String($this, $identifier, $parameters, $count, array($text_singular, $text_plural));
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}else{
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if($count === 1) {
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return new OC_L10N_String($this, $text_singular, $parameters, $count);
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}else{
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return new OC_L10N_String($this, $text_plural, $parameters, $count);
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}
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}
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}
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/**
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* getTranslations
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* @return array Fetch all translations
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*
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* Returns an associative array with all translations
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*/
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public function getTranslations() {
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$this->init();
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return $this->translations;
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}
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/**
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* getPluralFormFunction
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* @return string the plural form function
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*
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* returned function accepts the argument $n
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*/
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public function getPluralFormFunction() {
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$this->init();
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if(is_null($this->pluralFormFunction)) {
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$this->pluralFormFunction = $this->createPluralFormFunction($this->pluralFormString);
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}
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return $this->pluralFormFunction;
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}
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/**
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* Localization
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* @param string $type Type of localization
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* @param array|int|string $data parameters for this localization
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* @param array $options
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* @return string|false
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*
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* Returns the localized data.
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*
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* Implemented types:
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* - date
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* - Creates a date
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* - params: timestamp (int/string)
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* - datetime
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* - Creates date and time
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* - params: timestamp (int/string)
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* - time
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* - Creates a time
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* - params: timestamp (int/string)
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*/
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public function l($type, $data, $options = array()) {
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if ($type === 'firstday') {
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return $this->getFirstWeekDay();
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}
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if ($type === 'jsdate') {
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return $this->getDateFormat();
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}
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$this->init();
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$value = new DateTime();
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if($data instanceof DateTime) {
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$value = $data;
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} elseif(is_string($data) && !is_numeric($data)) {
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$data = strtotime($data);
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$value->setTimestamp($data);
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} else {
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$value->setTimestamp($data);
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}
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// Use the language of the instance, before falling back to the current user's language
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$locale = $this->lang;
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if ($locale === null) {
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$locale = self::findLanguage();
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}
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$options = array_merge(array('width' => 'long'), $options);
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$width = $options['width'];
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switch($type) {
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case 'date':
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return Punic\Calendar::formatDate($value, $width, $locale);
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break;
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case 'datetime':
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return Punic\Calendar::formatDatetime($value, $width, $locale);
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break;
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case 'time':
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return Punic\Calendar::formatTime($value, $width, $locale);
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break;
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default:
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return false;
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}
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}
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/**
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* Choose a language
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* @param array $text Associative Array with possible strings
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* @return String
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*
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* $text is an array 'de' => 'hallo welt', 'en' => 'hello world', ...
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*
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* This function is useful to avoid loading thousands of files if only one
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* simple string is needed, for example in appinfo.php
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*/
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public static function selectLanguage($text) {
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$lang = self::findLanguage(array_keys($text));
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return $text[$lang];
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}
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/**
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* The given language is forced to be used while executing the current request
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* @param string $lang
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*/
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public static function forceLanguage($lang) {
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self::$language = $lang;
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}
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/**
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* The code (en, de, ...) of the language that is used for this OC_L10N object
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*
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* @return string language
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*/
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public function getLanguageCode() {
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return $this->lang ? $this->lang : self::findLanguage();
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}
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/**
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* find the best language
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* @param array|string $app details below
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* @return string language
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*
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* If $app is an array, ownCloud assumes that these are the available
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* languages. Otherwise ownCloud tries to find the files in the l10n
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* folder.
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*
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* If nothing works it returns 'en'
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*/
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public static function findLanguage($app = null) {
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if(!is_array($app) && self::$language != '') {
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return self::$language;
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}
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if(OC_User::getUser() && \OC::$server->getConfig()->getUserValue(OC_User::getUser(), 'core', 'lang')) {
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$lang = \OC::$server->getConfig()->getUserValue(OC_User::getUser(), 'core', 'lang');
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self::$language = $lang;
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if(is_array($app)) {
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$available = $app;
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$lang_exists = array_search($lang, $available) !== false;
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} else {
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$lang_exists = self::languageExists($app, $lang);
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}
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if($lang_exists) {
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return $lang;
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}
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}
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$default_language = \OC::$server->getConfig()->getSystemValue('default_language', false);
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if($default_language !== false) {
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return $default_language;
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}
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return self::setLanguageFromRequest($app);
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}
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/**
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* find the l10n directory
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* @param string $app App that needs to be translated
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* @return string directory
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*/
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protected static function findI18nDir($app) {
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// find the i18n dir
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$i18nDir = OC::$SERVERROOT.'/core/l10n/';
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if($app != '') {
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// Check if the app is in the app folder
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if(file_exists(OC_App::getAppPath($app).'/l10n/')) {
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$i18nDir = OC_App::getAppPath($app).'/l10n/';
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}
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else{
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$i18nDir = OC::$SERVERROOT.'/'.$app.'/l10n/';
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}
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}
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return $i18nDir;
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}
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/**
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* find all available languages for an app
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* @param string $app App that needs to be translated
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* @return array an array of available languages
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*/
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public static function findAvailableLanguages($app=null) {
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if(!empty(self::$availableLanguages)) {
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return self::$availableLanguages;
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}
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$available=array('en');//english is always available
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$dir = self::findI18nDir($app);
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if(is_dir($dir)) {
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$files=scandir($dir);
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foreach($files as $file) {
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if(substr($file, -5, 5) === '.json' && substr($file, 0, 4) !== 'l10n') {
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$i = substr($file, 0, -5);
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$available[] = $i;
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}
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}
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}
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self::$availableLanguages = $available;
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return $available;
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}
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/**
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* @param string $app
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* @param string $lang
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* @return bool
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*/
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public static function languageExists($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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$dir = self::findI18nDir($app);
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if(is_dir($dir)) {
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return file_exists($dir.'/'.$lang.'.json');
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}
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return false;
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}
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/**
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* @return string
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* @throws \Punic\Exception\ValueNotInList
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*/
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public function getDateFormat() {
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$locale = $this->getLanguageCode();
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return Punic\Calendar::getDateFormat('short', $locale);
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}
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/**
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* @return int
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*/
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public function getFirstWeekDay() {
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$locale = $this->getLanguageCode();
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return Punic\Calendar::getFirstWeekday($locale);
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}
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}
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