class.ilContext.php

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<?php
 
/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */
 
class ilContext
{               
        protected static $class_name; // [string]
        protected static $type; // [string]     
        
        const CONTEXT_WEB = "ilContextWeb";
        const CONTEXT_CRON = "ilContextCron";
        const CONTEXT_RSS = "ilContextRss";
        const CONTEXT_ICAL = "ilContextIcal";
        const CONTEXT_SOAP = "ilContextSoap";
        const CONTEXT_WEBDAV = "ilContextWebdav";
        const CONTEXT_RSS_AUTH = "ilContextRssAuth";
        const CONTEXT_SESSION_REMINDER = "ilContextSessionReminder";
        const CONTEXT_SOAP_WITHOUT_CLIENT = "ilContextSoapWithoutClient";
        const CONTEXT_UNITTEST = "ilContextUnitTest";
        const CONTEXT_REST = "ilContextRest";
        const CONTEXT_SCORM = "ilContextScorm";
        const CONTEXT_WAC = "ilContextWAC";
        const CONTEXT_APACHE_SSO = 'ilContextApacheSSO';
        const CONTEXT_SHIBBOLETH = 'ilContextShibboleth';
        
        
        public static function init($a_type)
        {
                include_once "Services/Context/classes/class.".$a_type.".php";
                self::$class_name = $a_type;
                self::$type = $a_type;
                
                return true;
        }
        
        protected static function callContext($a_method)
        {
                if(!self::$class_name)
                {
                        self::init(self::CONTEXT_WEB);
                }               
                return call_user_func(array(self::$class_name, $a_method));
        }
        
        public static function supportsRedirects()
        {
                global $ilCtrl;
                
                // asynchronous calls must never be redirected
                if($ilCtrl && $ilCtrl->isAsynch())
                {
                        return false;
                }
                
                return (bool)self::callContext("supportsRedirects");
        }
        
        public static function hasUser()
        {
                return (bool)self::callContext("hasUser");              
        }
        
        public static function usesHTTP()
        {
                return (bool)self::callContext("usesHTTP");     
        }
        
        public static function hasHTML()
        {
                return (bool)self::callContext("hasHTML");      
        }
        
        public static function usesTemplate()
        {
                return (bool)self::callContext("usesTemplate"); 
        }
        
        public static function initClient()
        {
                return (bool)self::callContext("initClient");   
        }
        
        public static function doAuthentication()
        {
                return (bool)self::callContext("doAuthentication");     
        }
        
        public static function getType()
        {
                return self::$type;
        }
        
        public static function supportsPersistentSessions()
        {
                return (bool) self::callContext('supportsPersistentSessions');
        }
}
 
?>