class.ilObjHACPTracking.php

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<?
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2006 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. |
        +-----------------------------------------------------------------------------+
*/

require_once("./Modules/ScormAicc/classes/AICC/class.ilObjAICCTracking.php");
require_once("./Modules/ScormAicc/classes/HACP/class.ilHACPResponse.php");


class ilObjHACPTracking extends ilObjAICCTracking {

        function ilObjHACPTracking($ref_id, $obj_id)
        {
                global $ilias, $ilDB, $ilUser;
                
        
                //just to make sure to extract only this parameter 
                $mainKeys=array("command", "version", "session_id", "aicc_data");
                $postVars=array_change_key_case($_POST, CASE_LOWER);
                foreach($mainKeys as $key) {
                        $$key=$postVars[$key];
                }
                
                //only allowed commands
                $command=strtolower($command);
                $allowedCommands=array("getparam", "putparam", "exitau");
                if (!in_array($command, $allowedCommands)) {
                        exit;
                }
/*                      
                $fp=fopen("././Modules/ScormAicc/log/hacp.log", "a+");
                fputs($fp, "$command ref_id=$ref_id, obj_id=$obj_id\n");        
                fclose($fp);                    
*/              
                $this->$command($ref_id, $obj_id, $version, $aicc_data);
                
        }
        
        function getparam($ref_id, $obj_id, $version, $aicc_data) {
                //if (empty($aicc_data)) {
                //      $this->startau($ref_id, $obj_id, $version, $aicc_data);
                //      return;
                //}
                
                $response=new ilHACPResponse($ref_id, $obj_id);
                $response->sendParam(); 
                
/*              
                $fp=fopen("././Modules/ScormAicc/log/hacp.log", "a+");
                fputs($fp, "getparam ref_id=$ref_id, obj_id=$obj_id, aicc_data=$aicc_data\n");  
                fclose($fp);    
*/
        }
        
        function putparam($ref_id, $obj_id, $version, $aicc_data) {
                //aiccdata is a non standard ini format
                //$data=parse_ini_file($tmpFilename, TRUE);
                $data=$this->parseAICCData($aicc_data);

                $hacp_id = ilObject::_lookupObjId($ref_id);
                
                //choose either insert or update to be able to inherit superclass
                global $ilDB, $ilUser, $ilLog;
                $this->update=array();
                $this->insert=array();
                if (is_object($ilUser)) {
                        $user_id = $ilUser->getId();
                        foreach ($data as $key=>$value) 
                        {

                                $set = $ilDB->queryF('
                                SELECT * FROM scorm_tracking WHERE user_id = %s
                                AND sco_id = %s
                                AND lvalue = %s
                                AND obj_id = %s',
                                array('integer','integer','text','integer'),
                                array($user_id,$obj_id,$key,$hacp_id));
                                
                                if ($rec = $ilDB->fetchAssoc($set))
                                        $this->update[] = array("left" => $key, "right" => $value);
                                else
                                        $this->insert[] = array("left" => $key, "right" => $value);
                        }
                }
                
                //store
                $this->store($hacp_id, $obj_id, 0);
                
                $response=new ilHACPResponse($ref_id, $obj_id);
                $response->sendOk();
        }

        function exitau($ref_id, $obj_id, $version, $aicc_data) {
                $response=new ilHACPResponse($ref_id, $obj_id);
                $response->sendOk();
        }
        
        function startau($ref_id, $obj_id, $version, $aicc_data) {
                $response=new ilHACPResponse($ref_id, $obj_id);
                $response->sendParam(); 
        }

        function parseAICCData($string) {
                $data=array();
                if (!empty($string)) {
                        $lines=explode("\n", $string);
                        for($i=0;$i<count($lines);$i++) {
                                $line=trim($lines[$i]);
                                if (empty($line) || substr($line,0,1)==";" || substr($line,0,1)=="#"){
                                        continue;
                                }
                                if (substr($line,0,1)=="[") {
                                        $block=substr($line,1,-1);
                                        continue;
                                }
                                if (empty($block))
                                        continue;
                                
                                if (substr_count($line, "=")==0)
                                        $data[strtolower("cmi.".$block)]=$line;
                                else if (substr_count($line, "=")==1) {
                                        $line=explode("=", $line);
                                        $data[strtolower("cmi.".$block.".".$line[0])]=$line[1];
                                }
                        }
                }
                return $data;
        }
        
}

?>