249 lines
6.3 KiB
PHP
249 lines
6.3 KiB
PHP
<?php
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/**
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* @file src/Core/L10n.php
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*/
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namespace Friendica\Core;
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use Friendica\Core\Config;
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use dba;
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require_once 'boot.php';
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require_once 'include/dba.php';
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/**
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* Provide Languange, Translation, and Localisation functions to the application
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* Localisation can be referred to by the numeronym L10N (as in: "L", followed by ten more letters, and then "N").
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*/
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class L10n
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{
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/**
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* @brief get the prefered language from the HTTP_ACCEPT_LANGUAGE header
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*/
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public static function getBrowserLanguage()
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{
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$lang_list = [];
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if (x($_SERVER, 'HTTP_ACCEPT_LANGUAGE')) {
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// break up string into pieces (languages and q factors)
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preg_match_all('/([a-z]{1,8}(-[a-z]{1,8})?)\s*(;\s*q\s*=\s*(1|0\.[0-9]+))?/i', $_SERVER['HTTP_ACCEPT_LANGUAGE'], $lang_parse);
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if (count($lang_parse[1])) {
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// go through the list of prefered languages and add a generic language
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// for sub-linguas (e.g. de-ch will add de) if not already in array
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for ($i = 0; $i < count($lang_parse[1]); $i++) {
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$lang_list[] = strtolower($lang_parse[1][$i]);
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if (strlen($lang_parse[1][$i])>3) {
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$dashpos = strpos($lang_parse[1][$i], '-');
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if (!in_array(substr($lang_parse[1][$i], 0, $dashpos), $lang_list)) {
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$lang_list[] = strtolower(substr($lang_parse[1][$i], 0, $dashpos));
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}
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}
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}
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}
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}
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// check if we have translations for the preferred languages and pick the 1st that has
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foreach ($lang_list as $lang) {
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if ($lang === 'en' || (file_exists("view/lang/$lang") && is_dir("view/lang/$lang"))) {
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$preferred = $lang;
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break;
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}
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}
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if (isset($preferred)) {
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return $preferred;
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}
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// in case none matches, get the system wide configured language, or fall back to English
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return Config::get('system', 'language', 'en');
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}
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/**
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* @param string $language language
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*/
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public static function pushLang($language)
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{
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global $lang, $a;
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$a->langsave = $lang;
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if ($language === $lang) {
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return;
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}
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if (isset($a->strings) && count($a->strings)) {
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$a->stringsave = $a->strings;
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}
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$a->strings = [];
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self::loadTranslationTable($language);
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$lang = $language;
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}
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/**
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* Pop language off the top of the stack
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*/
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public static function popLang()
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{
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global $lang, $a;
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if ($lang === $a->langsave) {
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return;
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}
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if (isset($a->stringsave)) {
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$a->strings = $a->stringsave;
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} else {
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$a->strings = [];
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}
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$lang = $a->langsave;
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}
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/**
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* load string translation table for alternate language
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*
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* first addon strings are loaded, then globals
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*
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* @param string $lang language code to load
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*/
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public static function loadTranslationTable($lang)
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{
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$a = get_app();
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$a->strings = [];
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// load enabled addons strings
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$addons = dba::select('addon', ['name'], ['installed' => true]);
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while ($p = dba::fetch($addons)) {
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$name = $p['name'];
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if (file_exists("addon/$name/lang/$lang/strings.php")) {
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include "addon/$name/lang/$lang/strings.php";
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}
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}
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if (file_exists("view/lang/$lang/strings.php")) {
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include "view/lang/$lang/strings.php";
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}
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}
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/**
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* @brief Return the localized version of the provided string with optional string interpolation
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*
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* This function takes a english string as parameter, and if a localized version
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* exists for the current language, substitutes it before performing an eventual
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* string interpolation (sprintf) with additional optional arguments.
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*
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* Usages:
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* - L10n::t('This is an example')
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* - L10n::t('URL %s returned no result', $url)
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* - L10n::t('Current version: %s, new version: %s', $current_version, $new_version)
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*
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* @param string $s
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* @param array $vars Variables to interpolate in the translation string
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* @return string
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*/
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public static function t($s, ...$vars)
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{
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$a = get_app();
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if (empty($s)) {
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return '';
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}
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if (x($a->strings, $s)) {
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$t = $a->strings[$s];
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$s = is_array($t) ? $t[0] : $t;
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}
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if (count($vars) > 0) {
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$s = sprintf($s, ...$vars);
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}
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return $s;
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}
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/**
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* @brief Return the localized version of a singular/plural string with optional string interpolation
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*
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* This function takes two english strings as parameters, singular and plural, as
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* well as a count. If a localized version exists for the current language, they
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* are used instead. Discrimination between singular and plural is done using the
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* localized function if any or the default one. Finally, a string interpolation
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* is performed using the count as parameter.
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*
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* Usages:
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* - L10n::tt('Like', 'Likes', $count)
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* - L10n::tt("%s user deleted", "%s users deleted", count($users))
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*
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* @global type $lang
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* @param string $singular
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* @param string $plural
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* @param int $count
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* @return string
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*/
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public static function tt($singular, $plural, $count)
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{
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global $lang;
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$a = get_app();
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if (x($a->strings, $singular)) {
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$t = $a->strings[$singular];
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if (is_array($t)) {
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$plural_function = 'string_plural_select_' . str_replace('-', '_', $lang);
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if (function_exists($plural_function)) {
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$i = $plural_function($count);
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} else {
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$i = self::stringPluralSelectDefault($count);
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}
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$s = $t[$i];
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} else {
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$s = $t;
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}
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} elseif (self::stringPluralSelectDefault($count)) {
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$s = $plural;
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} else {
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$s = $singular;
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}
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$s = @sprintf($s, $count);
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return $s;
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}
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/**
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* Provide a fallback which will not collide with a function defined in any language file
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*/
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private static function stringPluralSelectDefault($n)
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{
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return $n != 1;
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}
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/**
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* @brief Return installed languages codes as associative array
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*
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* Scans the view/lang directory for the existence of "strings.php" files, and
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* returns an alphabetical list of their folder names (@-char language codes).
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* Adds the english language if it's missing from the list.
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*
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* Ex: array('de' => 'de', 'en' => 'en', 'fr' => 'fr', ...)
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*
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* @return array
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*/
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public static function getAvailableLanguages()
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{
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$langs = [];
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$strings_file_paths = glob('view/lang/*/strings.php');
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if (is_array($strings_file_paths) && count($strings_file_paths)) {
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if (!in_array('view/lang/en/strings.php', $strings_file_paths)) {
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$strings_file_paths[] = 'view/lang/en/strings.php';
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}
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asort($strings_file_paths);
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foreach ($strings_file_paths as $strings_file_path) {
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$path_array = explode('/', $strings_file_path);
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$langs[$path_array[2]] = $path_array[2];
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}
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}
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return $langs;
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}
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}
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