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<?php
class L10N {
/** @var string */
private $pageName;
/** @var array */
private $baseTranslations = null;
/** @var bool */
private $changed = false;
/** @var array */
private $requestedStrings = [];
/** @var int */
private $countBefore = 0;
/**
* @param string $pageName
*/
public function __construct($pageName) {
$this->pageName = $pageName;
}
/**
* Clean-up unused strings in the JSON file
*/
public function __destruct() {
if($this->changed === true || $this->countBefore !== count($this->requestedStrings)) {
file_put_contents($this->getBaseTranslationFilePath(), json_encode($this->requestedStrings, JSON_PRETTY_PRINT));
}
}
/**
* @return string
*/
private function getBaseTranslationFilePath() {
return $baseTranslationFile = __DIR__ . '/l10n/base/' . $this->pageName . '.json';
}
/**
* Gets the currently used language either from the hl parameter or the current domain
*
* @return string
*/
private function getCurrentLanguage() {
$path = parse_url(site_url())['path'];
$language = explode('/', substr($_SERVER['REQUEST_URI'], strlen($path)));
if(isset($language[1]) && strlen($language[1]) === 2) {
if(ctype_alnum($language[1])) {
return $language[1];
}
}
return 'en';
}
public function t($string) {
$baseTranslationFile = $this->getBaseTranslationFilePath();
if(!file_exists($baseTranslationFile)) {
file_put_contents($baseTranslationFile, json_encode([]));
}
$stringHash = md5($string);
// If the string doesn't yet exist to translate: Create it
if($this->baseTranslations === null) {
$this->baseTranslations= json_decode(file_get_contents($baseTranslationFile), true);
$this->countBefore = count($this->baseTranslations);
if (!isset($this->baseTranslations[$stringHash])) {
$this->baseTranslations[$stringHash] = $string;
$this->changed = true;
}
}
$this->requestedStrings[$stringHash] = $string;
// Read the translated string if 100% translated
$translationFile = __DIR__ . '/l10n/'.$this->getCurrentLanguage().'/' . $this->pageName . '.json';
if(file_exists($translationFile)) {
$originalFile = json_decode(file_get_contents(__DIR__ . '/l10n/base/' . $this->pageName . '.json'), true);
$translationFile = json_decode(file_get_contents($translationFile), true);
if(!is_array($translationFile) || !is_array($originalFile)) {
return $string;
}
if(count(array_diff_key($translationFile, $originalFile)) > 0) {
return $string;
}
if(isset($translationFile[$stringHash])) {
return $translationFile[$stringHash];
}
}
return $string;
}
}
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