class.ilLanguageDetectorFactory.php

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<?php
/* Copyright (c) 1998-2015 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilLanguageDetectorFactory
{
        const DEFAULT_DETECTOR      = 1;
        const HTTP_REQUEST_DETECTOR = 2;

        protected $client_ini;

        protected $request_information = array();

        protected $settings;

        public function __construct()
        {
                global $ilClientIniFile, $ilSetting;

                $this->client_ini          = $ilClientIniFile;
                $this->request_information = $_SERVER;
                $this->settings            = $ilSetting;
        }

        public function getValidInstances()
        {
                $detectors = array(
                        $this->createDetectorByType(self::DEFAULT_DETECTOR)
                );

                if(
                        $this->settings->get('lang_detection') &&
                        ilContext::usesHTTP()
                )
                {
                        $detectors[] = $this->createDetectorByType(self::HTTP_REQUEST_DETECTOR);
                }
                
                return $detectors;
        }

        public function createDetectorByType($type)
        {
                switch($type)
                {
                        case self::HTTP_REQUEST_DETECTOR:
                                require_once 'Services/Language/classes/class.ilHttpRequestsLanguageDetector.php';
                                return new ilHttpRequestsLanguageDetector($this->request_information['HTTP_ACCEPT_LANGUAGE']);

                        case self::DEFAULT_DETECTOR:
                                require_once 'Services/Language/classes/class.ilDefaultLanguageDetector.php';
                                return new ilDefaultLanguageDetector($this->client_ini);
                }

                require_once 'Services/Language/exceptions/class.ilLanguageException.php';
                throw new ilLanguageException(__METHOD__ . sprintf('Cannot create language detector instance for type %s!', $type));
        }
}