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234 lines
9.4 KiB
234 lines
9.4 KiB
<?php //$id$
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/**
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* This script contains the server part of the xajax interaction process. The client part is located
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* in lp_api.php or other api's.
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* This is a first attempt at using xajax and AJAX in general, so the code might be a bit unsettling.
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* @package dokeos.learnpath
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* @author Yannick Warnier <ywarnier@beeznest.org>
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*/
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/**
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* Script
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*/
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//flag to allow for anonymous user - needs to be set before global.inc.php
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$use_anonymous = true;
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// name of the language file that needs to be included
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$language_file[] = 'learnpath';
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require_once('back_compat.inc.php');
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/**
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* Get one item's details
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* @param integer LP ID
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* @param integer user ID
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* @param integer View ID
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* @param integer Current item ID
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* @param integer New item ID
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*/
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function switch_item_details($lp_id,$user_id,$view_id,$current_item,$next_item)
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{
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$debug=0;
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$return = '';
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if($debug>0){error_log('In xajax_switch_item_details('.$lp_id.','.$user_id.','.$view_id.','.$current_item.','.$next_item.')',0);}
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//$objResponse = new xajaxResponse();
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/*$item_id may be one of:
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* -'next'
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* -'previous'
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* -'first'
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* -'last'
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* - a real item ID
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*/
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require_once('learnpath.class.php');
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require_once('scorm.class.php');
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require_once('aicc.class.php');
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require_once('learnpathItem.class.php');
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require_once('scormItem.class.php');
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require_once('aiccItem.class.php');
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$mylp = '';
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if(isset($_SESSION['lpobject']))
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{
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if($debug>1){error_log('////$_SESSION[lpobject] is set',0);}
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$oLP =& unserialize($_SESSION['lpobject']);
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if(!is_object($oLP)){
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if($debug>1){error_log(print_r($oLP,true),0);}
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if($debug>2){error_log('////Building new lp',0);}
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unset($oLP);
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$code = api_get_course_id();
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$mylp = & new learnpath($code,$lp_id,$user_id);
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}else{
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if($debug>1){error_log('////Reusing session lp',0);}
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$mylp = & $oLP;
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}
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}
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$new_item_id = 0;
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switch($next_item){
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case 'next':
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$mylp->set_current_item($current_item);
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$mylp->next();
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$new_item_id = $mylp->get_current_item_id();
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if($debug>1){error_log('In {next} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
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break;
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case 'previous':
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$mylp->set_current_item($current_item);
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$mylp->previous();
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$new_item_id = $mylp->get_current_item_id();
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if($debug>1){error_log('In {previous} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
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break;
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case 'first':
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$mylp->set_current_item($current_item);
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$mylp->first();
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$new_item_id = $mylp->get_current_item_id();
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if($debug>1){error_log('In {first} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
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break;
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case 'last':
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break;
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default:
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//should be filtered to check it's not hacked
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if($next_item == $current_item){
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//if we're opening the same item again
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$mylp->items[$current_item]->restart();
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}
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$new_item_id = $next_item;
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$mylp->set_current_item($new_item_id);
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if($debug>1){error_log('In {default} - next item is '.$new_item_id.'(current: '.$current_item.')',0);}
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break;
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}
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$mylp->start_current_item(true);
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if($mylp->force_commit){
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$mylp->save_current();
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}
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//$objResponse->addAlert(api_get_path(REL_CODE_PATH).'newscorm/learnpathItem.class.php');
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if(is_object($mylp->items[$new_item_id])){
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$mylpi = & $mylp->items[$new_item_id];
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}else{
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if($debug>1){error_log('In switch_item_details - generating new item object',0);}
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$mylpi =& new learnpathItem($new_item_id,$user_id);
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$mylpi->set_lp_view($view_id);
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}
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/*
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* now get what's needed by the SCORM API:
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* -score
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* -max
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* -min
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* -lesson_status
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* -session_time
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* -suspend_data
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*/
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$myscore = $mylpi->get_score();
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$mymax = $mylpi->get_max();
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if($mymax===''){$mymax="''";}
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$mymin = $mylpi->get_min();
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$mylesson_status = $mylpi->get_status();
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$mylesson_location = $mylpi->get_lesson_location();
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$mytotal_time = $mylpi->get_scorm_time('js');
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$mymastery_score = $mylpi->get_mastery_score();
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$mymax_time_allowed = $mylpi->get_max_time_allowed();
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$mylaunch_data = $mylpi->get_launch_data();
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/*
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if($mylpi->get_type() == 'asset'){
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//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)
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$mylesson_status = 'completed';
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$mylpi->set_status('completed');
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$mylpi->save();
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}
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*/
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$mysession_time = $mylpi->get_total_time();
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$mysuspend_data = $mylpi->get_suspend_data();
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$mylesson_location = $mylpi->get_lesson_location();
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$myic = $mylpi->get_interactions_count();
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$myistring = '';
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for ($i=0;$i<$myic;$i++) {
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$myistring .= ",[".$i.",'','','','','','','']";
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}
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if (!empty($myistring)) {
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$myistring = substr($myistring,1);
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}
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//$objResponse->addScript(
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$return .=
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"score=".$myscore.";" .
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"max=".$mymax.";" .
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"min=".$mymin.";" .
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"lesson_status='".$mylesson_status."';" .
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"lesson_location='".$mylesson_location."';" .
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"session_time='".$mysession_time."';" .
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"suspend_data='".$mysuspend_data."';" .
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"total_time = '".$mytotal_time."';" .
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"mastery_score = '".$mymastery_score."';" .
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"max_time_allowed = '".$mymax_time_allowed."';" .
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"launch_data = '".$mylaunch_data."';" .
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"interactions = new Array(".$myistring.");" .
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"item_objectives = new Array();" .
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"G_lastError = 0;" .
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"G_LastErrorMessage = 'No error';";
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//);
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/*
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* and re-initialise the rest
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* -saved_lesson_status = 'not attempted'
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* -lms_lp_id
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* -lms_item_id
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* -lms_old_item_id
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* -lms_new_item_id
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* -lms_been_synchronized
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* -lms_initialized
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* -lms_total_lessons
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* -lms_complete_lessons
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* -lms_progress_bar_mode
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* -lms_view_id
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* -lms_user_id
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*/
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$mytotal = $mylp->get_total_items_count_without_chapters();
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$mycomplete = $mylp->get_complete_items_count();
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$myprogress_mode = $mylp->get_progress_bar_mode();
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$myprogress_mode = ($myprogress_mode==''?'%':$myprogress_mode);
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$mynext = $mylp->get_next_item_id();
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$myprevious = $mylp->get_previous_item_id();
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$myitemtype = $mylpi->get_type();
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$mylesson_mode = $mylpi->get_lesson_mode();
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$mycredit = $mylpi->get_credit();
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$mylaunch_data = $mylpi->get_launch_data();
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$myinteractions_count = $mylpi->get_interactions_count();
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$myobjectives_count = $mylpi->get_objectives_count();
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$mycore_exit = $mylpi->get_core_exit();
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//$objResponse->addScript(
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$return .=
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"saved_lesson_status='not attempted';" .
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"lms_lp_id=".$lp_id.";" .
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"lms_item_id=".$new_item_id.";" .
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"lms_old_item_id=0;" .
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"lms_been_synchronized=0;" .
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"lms_initialized=0;" .
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"lms_total_lessons=".$mytotal.";" .
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"lms_complete_lessons=".$mycomplete.";" .
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"lms_progress_bar_mod='".$myprogress_mode."';" .
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"lms_view_id=".$view_id.";" .
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"lms_user_id=".$user_id.";" .
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"next_item=".$new_item_id.";" . //this one is very important to replace possible literal strings
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"lms_next_item=".$mynext.";" .
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"lms_previous_item=".$myprevious.";" .
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"lms_item_type = '".$myitemtype."';" .
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"lms_item_credit = '".$mycredit."';" .
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"lms_item_lesson_mode = '".$mylesson_mode."';" .
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"lms_item_launch_data = '".$mylaunch_data."';" .
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"lms_item_interactions_count = '".$myinteractions_count."';" .
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"lms_item_objectives_count = '".$myinteractions_count."';" .
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"lms_item_core_exit = '".$mycore_exit."';" .
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"asset_timer = 0;";
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//);
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//$objResponse->addScript("update_toc('unhighlight','".$current_item."');");
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//$objResponse->addScript("update_toc('highlight','".$new_item_id."');");
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//$objResponse->addScript("update_toc('$mylesson_status','".$new_item_id."');");
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//$objResponse->addScript("update_progress_bar('$mycomplete','$mytotal','$myprogress_mode');");
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$return .= "update_toc('unhighlight','".$current_item."');".
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"update_toc('highlight','".$new_item_id."');".
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"update_toc('$mylesson_status','".$new_item_id."');".
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"update_progress_bar('$mycomplete','$mytotal','$myprogress_mode');";
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$mylp->set_error_msg('');
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$mylp->prerequisites_match(); //check the prerequisites are all complete
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if($debug>1){error_log('Prereq_match() returned '.htmlentities($mylp->error),0);}
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//$objResponse->addScript("update_message_frame('".str_replace("'","\'",htmlentities($mylp->error))."');");
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$return .= "update_message_frame('".str_replace("'","\'",api_htmlentities($mylp->error, ENT_QUOTES, api_get_system_encoding()))."');";
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$_SESSION['scorm_item_id'] = $new_item_id;//Save the new item ID for the exercise tool to use
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$_SESSION['lpobject'] = serialize($mylp);
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return $return;
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//return $objResponse;
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}
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echo switch_item_details($_GET['lid'],$_GET['uid'],$_GET['vid'],$_GET['iid'],$_GET['next']);
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