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<?php /** * Language Helper * Localization handler (Default: Thai) / class Language { private static ?string $currentLocale = null; private static array $translations = []; private const SUPPORTED_LOCALES = ['th', 'en']; private const DEFAULT_LOCALE = 'th'; public static function init(): void { if (self::$currentLocale !== null) { return; } $config = []; if (file_exists(__DIR__ . '/../../config/app.php')) { $config = require __DIR__ . '/../../config/app.php'; } $supported = $config['supported_locales'] ?? self::SUPPORTED_LOCALES; $default = $config['default_locale'] ?? self::DEFAULT_LOCALE; // Check query param (e.g. ?lang=en) if (isset($_GET['lang']) && is_string($_GET['lang']) && in_array($_GET['lang'], $supported, true)) { $_SESSION['locale'] = $_GET['lang']; if (!headers_sent()) { setcookie('cargoo_lang', $_GET['lang'], [ 'expires' => time() + (86400 365), 'path' => '/', 'httponly' => true, 'samesite' => 'Lax' ]); } } // Check session or cookie if (isset($_SESSION['locale']) && is_string($_SESSION['locale']) && in_array($_SESSION['locale'], $supported, true)) { self::$currentLocale = $_SESSION['locale']; } elseif (isset($_COOKIE['cargoo_lang']) && is_string($_COOKIE['cargoo_lang']) && in_array($_COOKIE['cargoo_lang'], $supported, true)) { self::$currentLocale = $_COOKIE['cargoo_lang']; } else { self::$currentLocale = $default; } self::loadTranslations(self::$currentLocale); } public static function getLocale(): string { self::init(); return self::$currentLocale ?? self::DEFAULT_LOCALE; } public static function setLocale(string $locale): void { $config = []; if (file_exists(__DIR__ . '/../../config/app.php')) { $config = require __DIR__ . '/../../config/app.php'; } $supported = $config['supported_locales'] ?? self::SUPPORTED_LOCALES; $default = $config['default_locale'] ?? self::DEFAULT_LOCALE; if (!in_array($locale, $supported, true)) { $locale = $default; } self::$currentLocale = $locale; $_SESSION['locale'] = $locale; if (!headers_sent()) { setcookie('cargoo_lang', $locale, [ 'expires' => time() + (86400 * 365), 'path' => '/', 'httponly' => true, 'samesite' => 'Lax' ]); } self::loadTranslations($locale); } /** * Load translation file safely using static whitelist mapping (Prevent LFI & Path Traversal) / private static function loadTranslations(string $locale): void { $localeFiles = [ 'th' => __DIR__ . '/../../lang/th.php', 'en' => __DIR__ . '/../../lang/en.php', ]; $filePath = $localeFiles[$locale] ?? $localeFiles[self::DEFAULT_LOCALE] ?? null; if ($filePath !== null && file_exists($filePath)) { self::$translations = require $filePath; } else { self::$translations = []; } } public static function trans(string $key, array $params = []): string { self::init(); $text = self::$translations[$key] ?? $key; foreach ($params as $k => $v) { $text = str_replace(':' . $k, (string)$v, $text); } return $text; } /* * Generate safe URL for switching language with current URI preservation / public static function switchUrl(string $locale): string { $targetLocale = in_array($locale, self::SUPPORTED_LOCALES, true) ? $locale : self::DEFAULT_LOCALE; $currentUri = $_SERVER['REQUEST_URI'] ?? ''; if ($currentUri !== '') { $parsed = parse_url($currentUri); $path = $parsed['path'] ?? ''; // If current URI is a language switch action itself, reset return URI if (preg_match('#/(language\|set-language\|lang)(/\|$)#i', $path)) { $currentUri = ''; } } $switchUrl = url('/language/' . urlencode($targetLocale)); if ($currentUri !== '') { $switchUrl .= '?return=' . urlencode($currentUri); } return $switchUrl; } } /* * Global translation shortcut */ function __(string $key, array $params = []): string { return Language::trans($key, $params); }

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