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236 lines
8.7 KiB
236 lines
8.7 KiB
<?php
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/* For licensing terms, see /license.txt */
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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 chamilo.learnpath
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* @author Yannick Warnier <ywarnier@beeznest.org>
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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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$use_anonymous = true;
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require_once '../inc/global.inc.php';
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/**
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* Get one item's details
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* @param integer LP ID
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* @param integer user ID
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* @param integer View ID
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* @param integer Current item ID
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* @param integer New item ID
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*/
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function switch_item_details($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) {
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error_log(
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'In xajax_switch_item_details('.$lp_id.','.$user_id.','.$view_id.','.$current_item.','.$next_item.')',
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0
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);
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}
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//$objResponse = new xajaxResponse();
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/*$item_id may be one of:
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* -'next'
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* -'previous'
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* -'first'
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* -'last'
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* - a real item ID
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*/
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$mylp = learnpath::getLpFromSession(api_get_course_id(), $lp_id, $user_id);
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$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) {
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error_log('In {next} - next item is '.$new_item_id.'(current: '.$current_item.')', 0);
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}
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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) {
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error_log('In {previous} - next item is '.$new_item_id.'(current: '.$current_item.')', 0);
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}
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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) {
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error_log('In {first} - next item is '.$new_item_id.'(current: '.$current_item.')', 0);
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}
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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) {
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error_log('In {default} - next item is '.$new_item_id.'(current: '.$current_item.')', 0);
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}
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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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$mylp->save_current();
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}
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if (is_object($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 ($debug > 1) {
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error_log('In switch_item_details - generating new item object', 0);
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}
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$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 === '') {
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$mymax = "''";
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}
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$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, Chamilo 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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/*
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* The following lines should reinitialize the values for the SCO
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* However, due to many complications, we are now relying more on the
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* LMSInitialize() call and its underlying lp_ajax_initialize.php call
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* so this code is technically deprecated (but the change of item_id should
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* remain). However, due to numerous technical issues with SCORM, we prefer
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* leaving it as a double-lock security. If removing, please test carefully
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* with both SCORM and proper learning path tracking.
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*/
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$return .=
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"olms.score=".$myscore.";".
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"olms.max=".$mymax.";".
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"olms.min=".$mymin.";".
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"olms.lesson_status='".$mylesson_status."';".
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"olms.lesson_location='".$mylesson_location."';".
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"olms.session_time='".$mysession_time."';".
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"olms.suspend_data='".$mysuspend_data."';".
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"olms.total_time = '".$mytotal_time."';".
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"olms.mastery_score = '".$mymastery_score."';".
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"olms.max_time_allowed = '".$mymax_time_allowed."';".
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"olms.launch_data = '".$mylaunch_data."';".
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"olms.interactions = new Array(".$myistring.");".
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"olms.item_objectives = new Array();".
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"olms.G_lastError = 0;".
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"olms.G_LastErrorMessage = 'No error';".
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"olms.finishSignalReceived = 0;";
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/*
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* and re-initialise the rest
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* -lms_lp_id
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* -lms_item_id
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* -lms_old_item_id
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* -lms_new_item_id
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* -lms_initialized
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* -lms_progress_bar_mode
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* -lms_view_id
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* -lms_user_id
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*/
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$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 = $mylpi->get_core_exit();
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$return .=
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//"saved_lesson_status='not attempted';" .
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"olms.lms_lp_id=".$lp_id.";".
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"olms.lms_item_id=".$new_item_id.";".
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"olms.lms_old_item_id=0;".
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//"lms_been_synchronized=0;" .
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"olms.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_mode='".$myprogress_mode."';" .
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"olms.lms_view_id=".$view_id.";".
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"olms.lms_user_id=".$user_id.";".
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"olms.next_item=".$new_item_id.";". // This one is very important to replace possible literal strings.
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"olms.lms_next_item=".$mynext.";".
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"olms.lms_previous_item=".$myprevious.";".
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"olms.lms_item_type = '".$myitemtype."';".
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"olms.lms_item_credit = '".$mycredit."';".
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"olms.lms_item_lesson_mode = '".$mylesson_mode."';".
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"olms.lms_item_launch_data = '".$mylaunch_data."';".
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"olms.lms_item_interactions_count = '".$myinteractions_count."';".
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"olms.lms_item_objectives_count = '".$myinteractions_count."';".
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"olms.lms_item_core_exit = '".$mycore_exit."';".
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"olms.asset_timer = 0;";
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$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','$myprogress_mode');";
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$return .= 'updateGamificationValues(); ';
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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 ($debug > 1) {
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error_log('Prereq_match() returned '.htmlentities($mylp->error), 0);
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}
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// Save the new item ID for the exercise tool to use.
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$_SESSION['scorm_item_id'] = $new_item_id;
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$_SESSION['lpobject'] = serialize($mylp);
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return $return;
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}
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echo switch_item_details(
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$_REQUEST['lid'],
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$_REQUEST['uid'],
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$_REQUEST['vid'],
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$_REQUEST['iid'],
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$_REQUEST['next']
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);
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