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- <?php //$id: $
- /**
- * This script contains the server part of the xajax interaction process. The client part is located
- * in lp_api.php or other api's.
- * This is a first attempt at using xajax and AJAX in general, so the code might be a bit unsettling.
- * @package dokeos.learnpath
- * @author Yannick Warnier <ywarnier@beeznest.org>
- */
- /**
- * Script
- */
- //flag to allow for anonymous user - needs to be set before global.inc.php
- $use_anonymous = true;
- // name of the language file that needs to be included
- $language_file[] = 'learnpath';
- require_once('back_compat.inc.php');
- /**
- * Backup an item's values into the javascript API as "old" values (so we still have them at hand)
- * @param integer Learnpath ID
- * @param integer User ID
- * @param integer View ID
- * @param integer Item ID
- * @param double Current score
- * @param double Maximum score
- * @param double Minimum score
- * @param string Lesson status
- * @param string Session time
- * @param string Suspend data
- * @param string Lesson location
- */
- function backup_item_details($lp_id,$user_id,$view_id,$item_id,$score=-1,$max=-1,$min=-1,$status='',$time='',$suspend='',$location='')
- {
- $objResponse = new xajaxResponse();
- $objResponse->addScript(
- "old_score=".$score.";" .
- "old_max=".$max.";" .
- "old_min=".$min.";" .
- "old_lesson_status='".$status."';" .
- "old_session_time='".$time."';" .
- "lms_old_item_id='".$item_id."';" .
- "old_suspend_data='".$suspend."';" .
- "old_lesson_location='".$location."';");
- //$objResponse->addAlert('data for item '.$item_id.', user '.$user_id.' backed up');
- return $objResponse;
- }
- /**
- * Writes an item's new values into the database and returns the operation result
- * @param integer Learnpath ID
- * @param integer User ID
- * @param integer View ID
- * @param integer Item ID
- * @param double Current score
- * @param double Maximum score
- * @param double Minimum score
- * @param string Lesson status
- * @param string Session time
- * @param string Suspend data
- * @param string Lesson location
- * @param string Core exit SCORM string
- */
- function save_item($lp_id,$user_id,$view_id,$item_id,$score=-1,$max=-1,$min=-1,$status='',$time=0,$suspend='',$location='',$interactions=array(),$core_exit='none')
- {
- global $_configuration;
- $debug=0;
- if($debug>0){error_log('In xajax_save_item('.$lp_id.','.$user_id.','.$view_id.','.$item_id.','.$score.','.$max.','.$min.','.$status.','.$time.',"'.$suspend.'","'.$location.'","'.(count($interactions)>0?$interactions[0]:'').'","'.$core_exit.'")',0);}
- $objResponse = new xajaxResponse();
- require_once('learnpath.class.php');
- require_once('scorm.class.php');
- require_once('aicc.class.php');
- require_once('learnpathItem.class.php');
- require_once('scormItem.class.php');
- require_once('aiccItem.class.php');
- $mylp = '';
- if(isset($_SESSION['lpobject']))
- {
- if($debug>1){error_log('////$_SESSION[lpobject] is set',0);}
- $oLP =& unserialize($_SESSION['lpobject']);
- if(!is_object($oLP)){
- if($debug>2){error_log(print_r($oLP,true),0);}
- if($debug>2){error_log('////Building new lp',0);}
- unset($oLP);
- $code = api_get_course_id();
- $mylp = & new learnpath($code,$lp_id,$user_id);
- }else{
- if($debug>2){error_log('////Reusing session lp',0);}
- $mylp = & $oLP;
- }
- }
- //$objResponse->addAlert(api_get_path(REL_CODE_PATH).'newscorm/learnpathItem.class.php');
-
-
- $prereq_check = $mylp->prerequisites_match($item_id);
- if($prereq_check === true) //launch the prerequisites check and set error if needed
- {
-
- $mylpi =& $mylp->items[$item_id];
- //$mylpi->set_lp_view($view_id);
- if($score!=-1){
- $mylpi->set_score($score);
- }
- if($max!=-1){
- $mylpi->max_score=$max;
- }
- if($min!=-1){
- $mylpi->min_score=$min;
- }
- if($status!='')
- {
- if($debug>1){error_log('Calling set_status('.$status.') from xajax',0);}
- $mylpi->set_status($status);
- if($debug>1){error_log('Done calling set_status from xajax',0);}
- }
- if($time!='')
- {
- //if big integer, then it's a timestamp, otherwise it's normal scorm time
- if($time == intval(strval($time)) && $time>1000000){
- $real_time = time() - $time;
- //$real_time += $mylpi->get_total_time();
- $mylpi->set_time($real_time,'int');
- }else{
- $mylpi->set_time($time);
- }
- }
- if($suspend!='')
- {
- $mylpi->current_data = $suspend;//escapetxt($suspend);
- }
- if($location!='')
- {
- $mylpi->set_lesson_location($location);
- }
- //deal with interactions provided in arrays in the following format
- //id(0), type(1), time(2), weighting(3),correct_responses(4),student_response(5),result(6),latency(7)
- if(is_array($interactions) && count($interactions)>0){
- foreach($interactions as $index=>$interaction){
- $mylpi->add_interaction($index,$interactions[$index]);
- }
- }
- $mylpi->set_core_exit($core_exit);
- $mylp->save_item($item_id,false);
- }
-
- $mystatus = $mylpi->get_status(false);
- $mytotal = $mylp->get_total_items_count_without_chapters();
- $mycomplete = $mylp->get_complete_items_count();
- $myprogress_mode = $mylp->get_progress_bar_mode();
- $myprogress_mode = ($myprogress_mode==''?'%':$myprogress_mode);
- //$mylpi->write_to_db();
- $_SESSION['lpobject'] = serialize($mylp);
- if($mylpi->get_type()!='sco')
- { //if this object's JS status has not been updated by the SCORM API, update now
- $objResponse->addScript("lesson_status='".$mystatus."';");
- }
- $objResponse->addScript("update_toc('".$mystatus."','".$item_id."');");
- $update_list = $mylp->get_update_queue();
- foreach($update_list as $my_upd_id => $my_upd_status)
- {
- if($my_upd_id != $item_id){ //only update the status from other items (i.e. parents and brothers), do not update current as we just did it already
- $objResponse->addScript("update_toc('".$my_upd_status."','".$my_upd_id."');");
- }
- }
- $objResponse->addScript("update_progress_bar('$mycomplete','$mytotal','$myprogress_mode');");
- if($debug>0){
- $objResponse->addScript("logit_lms('Saved data for item ".$item_id.", user ".$user_id." (status=".$mystatus.")',2)");
- if($debug>1){error_log('End of xajax_save_item()',0);}
- }
-
- if($_configuration['tracking_enabled'] && !isset($_SESSION['login_as']))
- { // if $_SESSION['login_as'] is set, then the user is an admin logged as the user
-
- $tbl_track_login = Database :: get_statistic_table(TABLE_STATISTIC_TRACK_E_LOGIN);
-
- $sql_last_connection="SELECT login_id, login_date FROM $tbl_track_login WHERE login_user_id='".api_get_user_id()."' ORDER BY login_date DESC LIMIT 0,1";
-
- $q_last_connection=api_sql_query($sql_last_connection);
- if(Database::num_rows($q_last_connection) > 0)
- {
- $row = Database::fetch_array($q_last_connection);
- $i_id_last_connection=$row['login_id'];
- $s_sql_update_logout_date="UPDATE $tbl_track_login SET logout_date=NOW() WHERE login_id='$i_id_last_connection'";
- api_sql_query($s_sql_update_logout_date);
- }
-
- }
-
- return $objResponse;
- }
- /**
- * Writes an item's new values into the database and returns the operation result
- * @param integer Learnpath ID
- * @param integer User ID
- * @param integer View ID
- * @param integer Item ID
- * @param array Objectives array
- */
- function save_objectives($lp_id,$user_id,$view_id,$item_id,$objectives=array())
- {
- global $_configuration;
- $debug=0;
- if($debug>0){error_log('In xajax_save_objectives('.$lp_id.','.$user_id.','.$view_id.','.$item_id.',"'.(count($objectives)>0?count($objectives):'').'")',0);}
- $objResponse = new xajaxResponse();
- require_once('learnpath.class.php');
- require_once('scorm.class.php');
- require_once('aicc.class.php');
- require_once('learnpathItem.class.php');
- require_once('scormItem.class.php');
- require_once('aiccItem.class.php');
- $mylp = '';
- if(isset($_SESSION['lpobject']))
- {
- if($debug>1){error_log('////$_SESSION[lpobject] is set',0);}
- $oLP =& unserialize($_SESSION['lpobject']);
- if(!is_object($oLP)){
- if($debug>2){error_log(print_r($oLP,true),0);}
- if($debug>2){error_log('////Building new lp',0);}
- unset($oLP);
- $code = api_get_course_id();
- $mylp = & new learnpath($code,$lp_id,$user_id);
- }else{
- if($debug>2){error_log('////Reusing session lp',0);}
- $mylp = & $oLP;
- }
- }
- $mylpi =& $mylp->items[$item_id];
- //error_log(__FILE__.' '.__LINE__.' '.print_r($objectives,true),0);
- if(is_array($objectives) && count($objectives)>0){
- foreach($objectives as $index=>$objective){
- //error_log(__FILE__.' '.__LINE__.' '.$objectives[$index][0],0);
- $mylpi->add_objective($index,$objectives[$index]);
- $mylpi->write_objectives_to_db();
- }
- }
- return $objResponse;
- }
- /**
- * Get one item's details
- * @param integer LP ID
- * @param integer user ID
- * @param integer View ID
- * @param integer Current item ID
- * @param integer New item ID
- */
- function switch_item_details($lp_id,$user_id,$view_id,$current_item,$next_item)
- {
- $debug=0;
- if($debug>0){error_log('In xajax_switch_item_details('.$lp_id.','.$user_id.','.$view_id.','.$current_item.','.$next_item.')',0);}
- $objResponse = new xajaxResponse();
- /*$item_id may be one of:
- * -'next'
- * -'previous'
- * -'first'
- * -'last'
- * - a real item ID
- */
- require_once('learnpath.class.php');
- require_once('scorm.class.php');
- require_once('aicc.class.php');
- require_once('learnpathItem.class.php');
- require_once('scormItem.class.php');
- require_once('aiccItem.class.php');
- $mylp = '';
- if(isset($_SESSION['lpobject']))
- {
- if($debug>1){error_log('////$_SESSION[lpobject] is set',0);}
- $oLP =& unserialize($_SESSION['lpobject']);
- if(!is_object($oLP)){
- if($debug>1){error_log(print_r($oLP,true),0);}
- if($debug>2){error_log('////Building new lp',0);}
- unset($oLP);
- $code = api_get_course_id();
- $mylp = & new learnpath($code,$lp_id,$user_id);
- }else{
- if($debug>1){error_log('////Reusing session lp',0);}
- $mylp = & $oLP;
- }
- }
- $new_item_id = 0;
- switch($next_item){
- case 'next':
- $mylp->set_current_item($current_item);
- $mylp->next();
- $new_item_id = $mylp->get_current_item_id();
- if($debug>1){error_log('In {next} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
- break;
- case 'previous':
- $mylp->set_current_item($current_item);
- $mylp->previous();
- $new_item_id = $mylp->get_current_item_id();
- if($debug>1){error_log('In {previous} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
- break;
- case 'first':
- $mylp->set_current_item($current_item);
- $mylp->first();
- $new_item_id = $mylp->get_current_item_id();
- if($debug>1){error_log('In {first} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
- break;
- case 'last':
- break;
- default:
- //should be filtered to check it's not hacked
- if($next_item == $current_item){
- //if we're opening the same item again
- $mylp->items[$current_item]->restart();
- }
- $new_item_id = $next_item;
- $mylp->set_current_item($new_item_id);
- if($debug>1){error_log('In {default} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
- break;
- }
- $mylp->start_current_item(true);
- if($mylp->force_commit){
- $mylp->save_current();
- }
- //$objResponse->addAlert(api_get_path(REL_CODE_PATH).'newscorm/learnpathItem.class.php');
- if(is_object($mylp->items[$new_item_id])){
- $mylpi = & $mylp->items[$new_item_id];
- }else{
- if($debug>1){error_log('In switch_item_details - generating new item object',0);}
- $mylpi =& new learnpathItem($new_item_id,$user_id);
- $mylpi->set_lp_view($view_id);
- }
- /*
- * now get what's needed by the SCORM API:
- * -score
- * -max
- * -min
- * -lesson_status
- * -session_time
- * -suspend_data
- */
- $myscore = $mylpi->get_score();
- $mymax = $mylpi->get_max();
- $mymin = $mylpi->get_min();
- $mylesson_status = $mylpi->get_status();
- $mylesson_location = $mylpi->get_lesson_location();
- $mytotal_time = $mylpi->get_scorm_time('js');
- $mymastery_score = $mylpi->get_mastery_score();
- $mymax_time_allowed = $mylpi->get_max_time_allowed();
- $mylaunch_data = $mylpi->get_launch_data();
- /*
- if($mylpi->get_type() == 'asset'){
- //temporary measure to save completion of an asset. Later on, Dokeos should trigger something on unload, maybe... (even though that would mean the last item cannot be completed)
- $mylesson_status = 'completed';
- $mylpi->set_status('completed');
- $mylpi->save();
- }
- */
- $mysession_time = $mylpi->get_total_time();
- $mysuspend_data = $mylpi->get_suspend_data();
- $mylesson_location = $mylpi->get_lesson_location();
- $objResponse->addScript(
- "score=".$myscore.";" .
- "max=".$mymax.";" .
- "min=".$mymin.";" .
- "lesson_status='".$mylesson_status."';" .
- "lesson_location='".$mylesson_location."';" .
- "session_time='".$mysession_time."';" .
- "suspend_data='".$mysuspend_data."';" .
- "lesson_location='".$mylesson_location."';" .
- "total_time = '".$mytotal_time."';" .
- "mastery_score = '".$mymastery_score."';" .
- "max_time_allowed = '".$mymax_time_allowed."';" .
- "launch_data = '".$mylaunch_data."';" .
- "interactions = new Array();" .
- "item_objectives = new Array();" .
- "G_lastError = 0;" .
- "G_LastErrorMessage = 'No error';");
- /*
- * and re-initialise the rest
- * -saved_lesson_status = 'not attempted'
- * -lms_lp_id
- * -lms_item_id
- * -lms_old_item_id
- * -lms_new_item_id
- * -lms_been_synchronized
- * -lms_initialized
- * -lms_total_lessons
- * -lms_complete_lessons
- * -lms_progress_bar_mode
- * -lms_view_id
- * -lms_user_id
- */
- $mytotal = $mylp->get_total_items_count_without_chapters();
- $mycomplete = $mylp->get_complete_items_count();
- $myprogress_mode = $mylp->get_progress_bar_mode();
- $myprogress_mode = ($myprogress_mode==''?'%':$myprogress_mode);
- $mynext = $mylp->get_next_item_id();
- $myprevious = $mylp->get_previous_item_id();
- $myitemtype = $mylpi->get_type();
- $mylesson_mode = $mylpi->get_lesson_mode();
- $mycredit = $mylpi->get_credit();
- $mylaunch_data = $mylpi->get_launch_data();
- $myinteractions_count = $mylpi->get_interactions_count();
- $myobjectives_count = $mylpi->get_objectives_count();
- $mycore_exit = $mylpi->get_core_exit();
- $objResponse->addScript(
- "saved_lesson_status='not attempted';" .
- "lms_lp_id=".$lp_id.";" .
- "lms_item_id=".$new_item_id.";" .
- "lms_old_item_id=0;" .
- "lms_been_synchronized=0;" .
- "lms_initialized=0;" .
- "lms_total_lessons=".$mytotal.";" .
- "lms_complete_lessons=".$mycomplete.";" .
- "lms_progress_bar_mod='".$myprogress_mode."';" .
- "lms_view_id=".$view_id.";" .
- "lms_user_id=".$user_id.";" .
- "next_item=".$new_item_id.";" . //this one is very important to replace possible literal strings
- "lms_next_item=".$mynext.";" .
- "lms_previous_item=".$myprevious.";" .
- "lms_item_type = '".$myitemtype."';" .
- "lms_item_credit = '".$mycredit."';" .
- "lms_item_lesson_mode = '".$mylesson_mode."';" .
- "lms_item_launch_data = '".$mylaunch_data."';" .
- "lms_item_interactions_count = '".$myinteractions_count."';" .
- "lms_item_objectives_count = '".$myinteractions_count."';" .
- "lms_item_core_exit = '".$mycore_exit."';" .
- "asset_timer = 0;"
- );
- $objResponse->addScript("update_toc('unhighlight','".$current_item."');");
- $objResponse->addScript("update_toc('highlight','".$new_item_id."');");
- $objResponse->addScript("update_toc('$mylesson_status','".$new_item_id."');");
- $objResponse->addScript("update_progress_bar('$mycomplete','$mytotal','$myprogress_mode');");
- $mylp->set_error_msg('');
- $mylp->prerequisites_match(); //check the prerequisites are all complete
- if($debug>1){error_log('Prereq_match() returned '.htmlentities($mylp->error),0);}
- $objResponse->addScript("update_message_frame('".str_replace("'","\'",htmlentities($mylp->error))."');");
- $_SESSION['scorm_item_id'] = $new_item_id;//Save the new item ID for the exercise tool to use
- $_SESSION['lpobject'] = serialize($mylp);
- return $objResponse;
- }
- /**
- * Start a timer and hand it back to the JS by assigning the current time (of start) to
- * var asset_timer
- */
- function start_timer()
- {
- $objResponse = new xajaxResponse();
- $time = time();
- $objResponse->addScript("asset_timer='$time';asset_timer_total=0;");
- return $objResponse;
- }
- require('lp_comm.common.php');
- $xajax->processRequests();
- ?>
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