class.ilSoapAdministration.php

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<?php
  /*
   +-----------------------------------------------------------------------------+
   | ILIAS open source                                                           |
   +-----------------------------------------------------------------------------+
   | Copyright (c) 1998-2009 ILIAS open source, University of Cologne            |
   |                                                                             |
   | This program is free software; you can redistribute it and/or               |
   | modify it under the terms of the GNU General Public License                 |
   | as published by the Free Software Foundation; either version 2              |
   | of the License, or (at your option) any later version.                      |
   |                                                                             |
   | This program is distributed in the hope that it will be useful,             |
   | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
   | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
   | GNU General Public License for more details.                                |
   |                                                                             |
   | You should have received a copy of the GNU General Public License           |
   | along with this program; if not, write to the Free Software                 |
   | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
   +-----------------------------------------------------------------------------+
  */


include_once './webservice/soap/lib/nusoap.php';
include_once ("./Services/Authentication/classes/class.ilAuthUtils.php");               // to get auth mode constants

define ('SOAP_CLIENT_ERROR', 1);
define ('SOAP_SERVER_ERROR', 2);

class ilSoapAdministration
{
        protected $soap_check = true;
        
        
        /*
         * object which handles php's authentication
         * @var object
         */
        var $sauth = null;

        /*
         * Defines type of error handling (PHP5 || NUSOAP)
         * @var object
         */
        var $error_method = null;


        public function __construct($use_nusoap = true)
        {
            define('USER_FOLDER_ID',7);
                define('NUSOAP',1);
                define('PHP5',2);

                if(IL_SOAPMODE == IL_SOAPMODE_NUSOAP)
                {
                        $this->error_method = NUSOAP;
                } 
                else
                { 
                        $this->error_method = PHP5;
                }
                #echo ("SOAP: using soap mode ".IL_SOAPMODE == IL_SOAPMODE_NUSOAP ? "NUSOAP": "PHP5");
                $this->__initAuthenticationObject();
        }

        // PROTECTED
        function __checkSession($sid)
        {
                global $ilUser;
                
                list($sid,$client) = $this->__explodeSid($sid);
                
                if(!strlen($sid))
                {
                        $this->__setMessage('No session id given');
                        $this->__setMessageCode('Client');
                        return false;   
                }
                if(!$client)
                {
                        $this->__setMessage('No client given');
                        $this->__setMessageCode('Client');
                        return false;   
                }
                
                if(!$GLOBALS['DIC']['ilAuthSession']->isAuthenticated())
                {
                        $this->__setMessage('Session invalid');
                        $this->__setMessageCode('Client');
                        return false;
                }

                if($ilUser->hasToAcceptTermsOfService())
                {
                        $this->__setMessage('User agreement no accepted.');
                        $this->__setMessageCode('Server');
                        return false;
                }

                if($this->soap_check)
                {
                        $set = new ilSetting();
                        $this->__setMessage('SOAP is not enabled in ILIAS administration for this client');
                        $this->__setMessageCode('Server');
                        return ($set->get("soap_user_administration") == 1);
                }

                return true;
        }

        public function initErrorWriter()
        {
                include_once('./Services/Init/classes/class.ilErrorHandling.php');

                set_error_handler(array('ilErrorHandling','_ilErrorWriter'),E_ALL);
        }


        function __explodeSid($sid)
        {
                $exploded = explode('::',$sid);

                return is_array($exploded) ? $exploded : array('sid' => '','client' => '');
        }


        function __setMessage($a_str)
        {
                $this->message = $a_str;
        }
        function __getMessage()
        {
                return $this->message;
        }
        function __appendMessage($a_str)
        {
                $this->message .= isset($this->message) ? ' ' : '';
                $this->message .= $a_str;
        }
        
        public function __setMessageCode($a_code)
        {
                $this->message_code = $a_code;
        }
        
        public function __getMessageCode()
        {
                return $this->message_code;
        }

        public function initAuth($sid)
        {
                list($sid,$client) = $this->__explodeSid($sid);
                define('CLIENT_ID',$client);
                $_COOKIE['ilClientId'] = $client;
                $_COOKIE['PHPSESSID'] = $sid;
        }

        public function initIlias()
        {               
                if(ilContext::getType() == ilContext::CONTEXT_SOAP)
                {
                        try
                        {
                                require_once("Services/Init/classes/class.ilInitialisation.php");
                                ilInitialisation::initILIAS();
                        }
                        catch(Exception $e)
                        {                               
                                // #10608                               
                                // no need to do anything here, see __checkSession() below
                        }
                }
        }


        function __initAuthenticationObject($a_auth_mode = AUTH_LOCAL)
        {
                include_once './Services/Authentication/classes/class.ilAuthFactory.php';
                ilAuthFactory::setContext(ilAuthFactory::CONTEXT_SOAP);
        }


        function __raiseError($a_message,$a_code)
        {
                #echo $a_message, $a_code;
            switch($this->error_method)
                {
                        case NUSOAP:
                                return new soap_fault($a_code,'',$a_message);
                        case PHP5:
                                return new SoapFault($a_code, $a_message);
                }
        }

        function getNIC($sid) 
        {
                $this->initAuth($sid);
                $this->initIlias();

            if(!$this->__checkSession($sid))
                {
                        return $this->__raiseError($this->__getMessage(),$this->__getMessageCode());
                }

                global $rbacsystem, $rbacreview, $ilLog, $rbacadmin,$ilSetting, $ilClientIniFile;

                if (!is_object($ilClientIniFile)) {
                    return $this->__raiseError("Client ini is not initialized","Server");
                }
                $auth_modes = ilAuthUtils::_getActiveAuthModes();
                $auth_mode_default =  strtoupper(ilAuthUtils::_getAuthModeName(array_shift($auth_modes)));
                $auth_mode_names = array();
                foreach ($auth_modes as $mode) {
                        $auth_mode_names[] = strtoupper(ilAuthUtils::_getAuthModeName($mode));
                }

                include_once 'Services/AdvancedMetaData/classes/class.ilAdvancedMDRecord.php';
                include_once 'Services/AdvancedMetaData/classes/class.ilAdvancedMDRecordXMLWriter.php';
                
                // create advanced meta data record xml
                $record_ids = array();
                $record_types = ilAdvancedMDRecord::_getAssignableObjectTypes();
                foreach($record_types as $type_info) {
                        $type = $type_info['obj_type'];
                        $records = ilAdvancedMDRecord::_getActivatedRecordsByObjectType($type);
                        foreach ($records as $record){
                                $record_ids [] = $record->getRecordId();
                        }                       
                }
                $record_ids = array_unique($record_ids);                
                $advmwriter = new ilAdvancedMDRecordXMLWriter($record_ids);
                $advmwriter->write();           
                
                // create user defined fields record xml, simulate empty user records
                include_once ("./Services/User/classes/class.ilUserXMLWriter.php");
                $udfWriter = new ilUserXMLWriter();
                $users = array();
                $udfWriter->setObjects($users);
                $udfWriter->start();                            
                 
        // todo: get information from client id, read from ini file specificied
        $client_details[] = array ("installation_id" => IL_INST_ID,
                                   "installation_version" => ILIAS_VERSION,
                                   "installation_url" => ILIAS_HTTP_PATH,
                                   "installation_description" => $ilClientIniFile->readVariable("client","description"),
                                                                        "installation_language_default" => $ilClientIniFile->readVariable("language","default"),
                                                                        "installation_session_expire" => $ilClientIniFile->readVariable("session","expire"),
                                                                        "installation_php_postmaxsize" => $this->return_bytes(ini_get("post_max_size")),
                                                                        "authentication_methods" => join(",", $auth_mode_names),
                                                                        "authentication_default_method" => $auth_mode_default,
                                                                "installation_udf_xml" => $udfWriter ->getXML(),
                                                                "installation_advmd_xml" => $advmwriter->xmlDumpMem(false)

                                                                                                                                                );

        // store into xml result set
                include_once './webservice/soap/classes/class.ilXMLResultSet.php';


        $xmlResult = new ilXMLResultSet();
        $xmlResult->addArray($client_details, true);

        // create writer and return xml
                include_once './webservice/soap/classes/class.ilXMLResultSetWriter.php';
        $xmlResultWriter = new ilXMLResultSetWriter($xmlResult);
        $xmlResultWriter->start();
        return $xmlResultWriter->getXML();
        }

        public static function return_bytes($val) {
                $val = trim($val);
                $last = strtolower($val{strlen($val)-1});
                switch($last) {
                // The 'G' modifier is available since PHP 5.1.0
                case 'g':
                        $val *= 1024;
                case 'm':
                        $val *= 1024;
                case 'k':
                        $val *= 1024;
                }
                return $val;
        }

        public function isFault($object) {
                switch($this->error_method)
                {
                        case NUSOAP:
                                return $object instanceof soap_fault;
                        case PHP5:
                                return $object instanceof SoapFault;
                }
                return true;
        }

        public function checkObjectAccess($ref_id, $expected_type, $permission, $returnObject = false) {
                global $rbacsystem;
                if(!is_numeric($ref_id))
                {
                        return $this->__raiseError('No valid id given.',
                                                                           'Client');
                }
                if (!ilObject::_exists($ref_id, true)) {
                        return $this->__raiseError('No object for id.',
                                                                           'CLIENT_OBJECT_NOT_FOUND');
                }
                
                if (ilObject::_isInTrash($ref_id)) {
                        return $this->__raiseError('Object is already trashed.',
                                                                           'CLIENT_OBJECT_DELETED');                    
                }
                
                $type = ilObjectFactory::getTypeByRefId($ref_id);
                if ((is_array($expected_type) && !in_array($type, $expected_type)) 
                    || 
                    (!is_array($expected_type) && $type != $expected_type)
                    )
                {
                        return $this->__raiseError("Wrong type $type for id. Expected: ".(is_array($expected_type) ? join (",",$expected_type) : $expected_type), 'CLIENT_OBJECT_WRONG_TYPE');                                          
                }
                
                if (!$rbacsystem->checkAccess($permission, $ref_id, $type))
                {
                        return $this->__raiseError('Missing permission $permission for type $type.', 'CLIENT_OBJECT_WRONG_PERMISSION');
                }
                
                if ($returnObject) {
                        return ilObjectFactory::getInstanceByRefId($ref_id);
                }
                
                return $type;
        }

        public function getInstallationInfoXML() 
        {               
                include_once "Services/Context/classes/class.ilContext.php";
                ilContext::init(ilContext::CONTEXT_SOAP_WITHOUT_CLIENT);
                
                require_once("Services/Init/classes/class.ilInitialisation.php");
                ilInitialisation::initILIAS();
                                
                $clientdirs = glob(ILIAS_WEB_DIR."/*",GLOB_ONLYDIR);
                require_once ("webservice/soap/classes/class.ilSoapInstallationInfoXMLWriter.php");     
                $writer = new ilSoapInstallationInfoXMLWriter ();
                $writer->start();               
                if (is_array($clientdirs))
                {               
                        foreach ($clientdirs as $clientdir) 
                        {                               
                                if (is_object($clientInfo= $this->getClientInfo($init, $clientdir)))
                                {
                                        $writer->addClient ($clientInfo);
                                }
                        }
                }
                $writer->end();
                
                return $writer->getXML();
        }
        
        public function getClientInfoXML($clientid) 
        {               
                include_once "Services/Context/classes/class.ilContext.php";
                ilContext::init(ilContext::CONTEXT_SOAP_WITHOUT_CLIENT);
                
                require_once("Services/Init/classes/class.ilInitialisation.php");
                ilInitialisation::initILIAS();  
                
                $clientdir = ILIAS_WEB_DIR."/".$clientid;
                require_once ("webservice/soap/classes/class.ilSoapInstallationInfoXMLWriter.php");
                $writer = new ilSoapInstallationInfoXMLWriter ();               
                $writer->setExportAdvancedMetaDataDefinitions (true);
                $writer->setExportUDFDefinitions (true);
                $writer->start();
                if (is_object($client = $this->getClientInfo($init, $clientdir)))
                {
                        $writer->addClient($client);
                }
                else
                        return $this->__raiseError("Client ID $clientid does not exist!", 'Client');
                $writer->end();
                return $writer->getXML();
        }
        
        private function getClientInfo ($init, $client_dir) 
        {
                global $ilDB;
                $ini_file = "./".$client_dir."/client.ini.php";
                
                // get settings from ini file
                require_once("./Services/Init/classes/class.ilIniFile.php");
                
                $ilClientIniFile = new ilIniFile($ini_file);
                $ilClientIniFile->read();
                if ($ilClientIniFile->ERROR != "")
                {
                        return false;
                }
                $client_id = $ilClientIniFile->readVariable('client','name');
                if ($ilClientIniFile->variableExists('client', 'expose'))
                {
                    $client_expose = $ilClientIniFile->readVariable('client','expose');
                    if ($client_expose == "0")
                        return false;
                }

                // build dsn of database connection and connect
                require_once("./Services/Database/classes/class.ilDBWrapperFactory.php");
                $ilDB = ilDBWrapperFactory::getWrapper($ilClientIniFile->readVariable("db","type"),
                        $ilClientIniFile->readVariable("db","inactive_mysqli"));
                $ilDB->initFromIniFile($ilClientIniFile);                       
                if ($ilDB->connect(true)) 
                {
                        $GLOBALS['ilDB'] = $ilDB;
        
                        require_once("Services/Administration/classes/class.ilSetting.php");
                        $settings = new ilSetting();
                        $GLOBALS["ilSetting"] = $settings;
                        // workaround to determine http path of client
                        define ("IL_INST_ID",  $settings->get("inst_id",0));
                        $settings->access = $ilClientIniFile->readVariable("client", "access");
                        $settings->description = $ilClientIniFile->readVariable("client","description");
                        $settings->session = min((int) ini_get("session.gc_maxlifetime"), (int) $ilClientIniFile->readVariable("session","expire"));
                        $settings->language = $ilClientIniFile->readVariable("language","default");
                        $settings->clientid = basename($client_dir); //pathinfo($client_dir, PATHINFO_FILENAME);
                        $settings->default_show_users_online = $settings->get("show_users_online");
                        $settings->default_hits_per_page = $settings->get("hits_per_page");
                        $skin = $ilClientIniFile->readVariable("layout","skin");
                        $style = $ilClientIniFile->readVariable("layout","style");
                        $settings->default_skin_style = $skin.":".$style;
                        return $settings;               
                }
                return null;
        }
        
        
}
?>