nextcloud/lib/private/l10n.php

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<?php
/**
* ownCloud
*
* @author Frank Karlitschek
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* @author Jakob Sack
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* @copyright 2012 Frank Karlitschek frank@owncloud.org
* @copyright 2013 Jakob Sack
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*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
* This class is for i18n and l10n
*/
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class OC_L10N implements \OCP\IL10N {
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/**
* cache
*/
protected static $cache = array();
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/**
* The best language
*/
protected static $language = '';
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/**
* App of this object
*/
protected $app;
/**
* Language of this object
*/
protected $lang;
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/**
* Translations
*/
private $translations = array();
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/**
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* Plural forms (string)
*/
private $pluralFormString = 'nplurals=2; plural=(n != 1);';
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/**
* Plural forms (function)
*/
private $pluralFormFunction = null;
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/**
* get an L10N instance
* @param string $app
* @param string|null $lang
* @return \OC_L10N
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*/
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public static function get($app, $lang=null) {
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if (is_null($lang)) {
return OC::$server->getL10N($app);
} else {
return new \OC_L10N($app, $lang);
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}
}
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/**
* The constructor
* @param string $app app requesting l10n
* @param string $lang default: null Language
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*
* If language is not set, the constructor tries to find the right
* language.
*/
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public function __construct($app, $lang = null) {
$this->app = $app;
$this->lang = $lang;
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}
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/**
* @param string $transFile
* @return bool
*/
public function load($transFile, $mergeTranslations = false) {
$this->app = true;
$json = json_decode(file_get_contents($transFile), true);
if (!is_array($json)) {
return false;
}
$this->pluralFormString = $json['pluralForm'];
$translations = $json['translations'];
if ($mergeTranslations) {
$this->translations = array_merge($this->translations, $translations);
} else {
$this->translations = $translations;
}
return true;
}
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protected function init() {
if ($this->app === true) {
return;
}
$app = OC_App::cleanAppId($this->app);
$lang = str_replace(array('\0', '/', '\\', '..'), '', $this->lang);
$this->app = true;
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// Find the right language
if(is_null($lang) || $lang == '') {
$lang = self::findLanguage($app);
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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{
$i18nDir = self::findI18nDir($app);
$transFile = strip_tags($i18nDir).strip_tags($lang).'.json';
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// Texts are in $i18ndir
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// (Just no need to define date/time format etc. twice)
if((OC_Helper::isSubDirectory($transFile, OC::$SERVERROOT.'/core/l10n/')
|| OC_Helper::isSubDirectory($transFile, OC::$SERVERROOT.'/lib/l10n/')
|| OC_Helper::isSubDirectory($transFile, OC::$SERVERROOT.'/settings')
|| OC_Helper::isSubDirectory($transFile, OC_App::getAppPath($app).'/l10n/')
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)
&& file_exists($transFile)) {
// load the translations file
if($this->load($transFile)) {
//merge with translations from theme
$theme = OC_Config::getValue( "theme" );
if (!is_null($theme)) {
$transFile = OC::$SERVERROOT.'/themes/'.$theme.substr($transFile, strlen(OC::$SERVERROOT));
if (file_exists($transFile)) {
$this->load($transFile, true);
}
}
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}
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}
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self::$cache[$app.'::'.$lang]['t'] = $this->translations;
}
}
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/**
* Creates a function that The constructor
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*
* If language is not set, the constructor tries to find the right
* language.
*
* Parts of the code is copied from Habari:
* https://github.com/habari/system/blob/master/classes/locale.php
* @param string $string
* @return string
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*/
protected function createPluralFormFunction($string){
if(preg_match( '/^\s*nplurals\s*=\s*(\d+)\s*;\s*plural=(.*)$/u', $string, $matches)) {
// sanitize
$nplurals = preg_replace( '/[^0-9]/', '', $matches[1] );
$plural = preg_replace( '#[^n0-9:\(\)\?\|\&=!<>+*/\%-]#', '', $matches[2] );
$body = str_replace(
array( 'plural', 'n', '$n$plurals', ),
array( '$plural', '$n', '$nplurals', ),
'nplurals='. $nplurals . '; plural=' . $plural
);
// add parents
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// important since PHP's ternary evaluates from left to right
$body .= ';';
$res = '';
$p = 0;
for($i = 0; $i < strlen($body); $i++) {
$ch = $body[$i];
switch ( $ch ) {
case '?':
$res .= ' ? (';
$p++;
break;
case ':':
$res .= ') : (';
break;
case ';':
$res .= str_repeat( ')', $p ) . ';';
$p = 0;
break;
default:
$res .= $ch;
}
}
$body = $res . 'return ($plural>=$nplurals?$nplurals-1:$plural);';
return create_function('$n', $body);
}
else {
// default: one plural form for all cases but n==1 (english)
return create_function(
'$n',
'$nplurals=2;$plural=($n==1?0:1);return ($plural>=$nplurals?$nplurals-1:$plural);'
);
}
}
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/**
* Translating
* @param string $text The text we need a translation for
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* @param array $parameters default:array() Parameters for sprintf
* @return \OC_L10N_String Translation or the same text
*
* Returns the translation. If no translation is found, $text will be
* returned.
*/
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public function t($text, $parameters = array()) {
return new OC_L10N_String($this, $text, $parameters);
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}
/**
* Translating
* @param string $text_singular the string to translate for exactly one object
* @param string $text_plural the string to translate for n objects
* @param integer $count Number of objects
* @param array $parameters default:array() Parameters for sprintf
* @return \OC_L10N_String Translation or the same text
*
* Returns the translation. If no translation is found, $text will be
* returned. %n will be replaced with the number of objects.
*
* The correct plural is determined by the plural_forms-function
* provided by the po file.
*
*/
public function n($text_singular, $text_plural, $count, $parameters = array()) {
$this->init();
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$identifier = "_${text_singular}_::_${text_plural}_";
if( array_key_exists($identifier, $this->translations)) {
return new OC_L10N_String( $this, $identifier, $parameters, $count );
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}else{
if($count === 1) {
return new OC_L10N_String($this, $text_singular, $parameters, $count);
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}else{
return new OC_L10N_String($this, $text_plural, $parameters, $count);
}
}
}
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/**
* getTranslations
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* @return array Fetch all translations
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*
* Returns an associative array with all translations
*/
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public function getTranslations() {
$this->init();
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return $this->translations;
}
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/**
* getPluralFormFunction
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* @return string the plural form function
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*
* returned function accepts the argument $n
*/
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public function getPluralFormFunction() {
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$this->init();
if(is_null($this->pluralFormFunction)) {
$this->pluralFormFunction = $this->createPluralFormFunction($this->pluralFormString);
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}
return $this->pluralFormFunction;
}
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/**
* Localization
* @param string $type Type of localization
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* @param array|int|string $data parameters for this localization
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* @return String or false
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*
* Returns the localized data.
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*
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* Implemented types:
* - date
* - Creates a date
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* - params: timestamp (int/string)
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* - datetime
* - Creates date and time
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* - params: timestamp (int/string)
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* - time
* - Creates a time
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* - params: timestamp (int/string)
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*/
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public function l($type, $data, $options = array()) {
if ($type === 'firstday') {
return $this->getFirstWeekDay();
}
if ($type === 'jsdate') {
return $this->getDateFormat();
}
$this->init();
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$value = new DateTime();
if($data instanceof DateTime) {
$value = $data;
} elseif(is_string($data) && !is_numeric($data)) {
$data = strtotime($data);
$value->setTimestamp($data);
} else {
$value->setTimestamp($data);
}
$locale = self::findLanguage();
$options = array_merge(array('width' => 'long'), $options);
$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, $locale);
break;
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case 'datetime':
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return Punic\Calendar::formatDatetime($value, $width, $locale);
break;
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case 'time':
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return Punic\Calendar::formatTime($value, $width, $locale);
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break;
default:
return false;
}
}
/**
* 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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*
* $text is an array 'de' => 'hallo welt', 'en' => 'hello world', ...
*
* This function is useful to avoid loading thousands of files if only one
* simple string is needed, for example in appinfo.php
*/
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public static function selectLanguage($text) {
$lang = self::findLanguage(array_keys($text));
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return $text[$lang];
}
/**
* The given language is forced to be used while executing the current request
* @param string $lang
*/
public static function forceLanguage($lang) {
self::$language = $lang;
}
/**
* find the best language
*
* @param array|string $app details below
*
* If $app is an array, ownCloud assumes that these are the available
* languages. Otherwise ownCloud tries to find the files in the l10n
* folder.
*
* If nothing works it returns 'en'
* @return string language
*/
public function getLanguageCode($app=null) {
return self::findLanguage($app);
}
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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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*
* If $app is an array, ownCloud assumes that these are the available
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* languages. Otherwise ownCloud tries to find the files in the l10n
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* folder.
*
* If nothing works it returns 'en'
*/
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public static function findLanguage($app = null) {
if(!is_array($app) && self::$language != '') {
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return self::$language;
}
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if(OC_User::getUser() && OC_Preferences::getValue(OC_User::getUser(), 'core', 'lang')) {
$lang = OC_Preferences::getValue(OC_User::getUser(), 'core', 'lang');
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self::$language = $lang;
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if(is_array($app)) {
$available = $app;
$lang_exists = array_search($lang, $available) !== false;
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} else {
$lang_exists = self::languageExists($app, $lang);
}
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if($lang_exists) {
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return $lang;
}
}
$default_language = OC_Config::getValue('default_language', false);
if($default_language !== false) {
return $default_language;
}
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if(isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
if(is_array($app)) {
$available = $app;
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} else {
$available = self::findAvailableLanguages($app);
}
// E.g. make sure that 'de' is before 'de_DE'.
sort($available);
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$preferences = preg_split('/,\s*/', strtolower($_SERVER['HTTP_ACCEPT_LANGUAGE']));
foreach($preferences as $preference) {
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list($preferred_language) = explode(';', $preference);
$preferred_language = str_replace('-', '_', $preferred_language);
foreach($available as $available_language) {
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if ($preferred_language === strtolower($available_language)) {
if (is_null($app)) {
self::$language = $available_language;
}
return $available_language;
}
}
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foreach($available as $available_language) {
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if (substr($preferred_language, 0, 2) === $available_language) {
if (is_null($app)) {
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self::$language = $available_language;
}
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return $available_language;
}
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}
}
}
// Last try: English
return 'en';
}
/**
* find the l10n directory
* @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
$i18ndir = OC::$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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}
else{
$i18ndir = OC::$SERVERROOT.'/'.$app.'/l10n/';
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}
}
return $i18ndir;
}
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/**
* find all available languages for an app
* @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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$available=array('en');//english is always available
$dir = self::findI18nDir($app);
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if(is_dir($dir)) {
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$files=scandir($dir);
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foreach($files as $file) {
if(substr($file, -5, 5) === '.json' && substr($file, 0, 4) !== 'l10n') {
$i = substr($file, 0, -5);
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$available[] = $i;
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}
}
}
return $available;
}
/**
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* @param string $app
* @param string $lang
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* @return bool
*/
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public static function languageExists($app, $lang) {
if ($lang == 'en') {//english is always available
return true;
}
$dir = self::findI18nDir($app);
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if(is_dir($dir)) {
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return file_exists($dir.'/'.$lang.'.json');
}
return false;
}
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/**
* @return string
* @throws \Punic\Exception\ValueNotInList
*/
public function getDateFormat() {
$locale = self::findLanguage();
return Punic\Calendar::getDateFormat('short', $locale);
}
/**
* @return int
*/
public function getFirstWeekDay() {
$locale = self::findLanguage();
return Punic\Calendar::getFirstWeekday($locale);
}
}