function LanguageNegotiationUrl::getLangcode

Overrides LanguageNegotiationMethodInterface::getLangcode

File

core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrl.php, line 50

Class

LanguageNegotiationUrl

Class for identifying language via URL prefix or domain.

Namespace

Code

public function getLangcode(?Request $request = NULL) {
    $langcode = NULL;
    if ($request && $this->languageManager) {
        $languages = $this->languageManager
            ->getLanguages();
        $config = $this->config
            ->get('language.negotiation')
            ->get('url');
        switch ($config['source']) {
            case LanguageNegotiationUrl::CONFIG_PATH_PREFIX:
                $request_path = urldecode(trim($request->getPathInfo(), '/'));
                $path_args = explode('/', $request_path);
                $prefix = array_shift($path_args);
                // Search prefix within added languages.
                $negotiated_language = FALSE;
                foreach ($languages as $language) {
                    if (isset($config['prefixes'][$language->getId()]) && $config['prefixes'][$language->getId()] == $prefix) {
                        $negotiated_language = $language;
                        break;
                    }
                }
                if ($negotiated_language) {
                    $langcode = $negotiated_language->getId();
                }
                break;
            case LanguageNegotiationUrl::CONFIG_DOMAIN:
                // Get only the host, not the port.
                $http_host = $request->getHost();
                foreach ($languages as $language) {
                    // Skip the check if the language doesn't have a domain.
                    if (!empty($config['domains'][$language->getId()])) {
                        // Ensure that there is exactly one protocol in the URL when
                        // checking the hostname.
                        $host = 'http://' . str_replace([
                            'http://',
                            'https://',
                        ], '', $config['domains'][$language->getId()]);
                        $host = parse_url($host, PHP_URL_HOST);
                        if ($http_host == $host) {
                            $langcode = $language->getId();
                            break;
                        }
                    }
                }
                break;
        }
    }
    return $langcode;
}