LanguageAdaptor.php

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<?php

class sspmod_core_Auth_Process_LanguageAdaptor extends SimpleSAML_Auth_ProcessingFilter {

        private $langattr = 'preferredLanguage';


        public function __construct($config, $reserved) {
                parent::__construct($config, $reserved);
                assert(is_array($config));

                if (array_key_exists('attributename', $config)) {
                        $this->langattr = $config['attributename'];
                }
        }


        public function process(&$request) {
                assert(is_array($request));
                assert(array_key_exists('Attributes', $request));

                $attributes =& $request['Attributes'];

                $attrlang = NULL;
                if (array_key_exists($this->langattr, $attributes))
                        $attrlang = $attributes[$this->langattr][0];

                $lang = SimpleSAML\Locale\Language::getLanguageCookie();


                if (isset($attrlang))
                        SimpleSAML\Logger::debug('LanguageAdaptor: Language in attribute was set [' . $attrlang . ']');
                if (isset($lang))
                        SimpleSAML\Logger::debug('LanguageAdaptor: Language in session   was set [' . $lang . ']');


                if (isset($attrlang) && !isset($lang)) {
                        // Language set in attribute but not in cookie - update cookie
                        SimpleSAML\Locale\Language::setLanguageCookie($attrlang);
                } elseif (!isset($attrlang) && isset($lang)) {
                        // Language set in cookie, but not in attribute. Update attribute
                        $request['Attributes'][$this->langattr] = array($lang);
                }

        }

}