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- <?php
- /* For licensing terms, see /license.txt */
- /**
- * 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 chamilo.learnpath
- * @author Yannick Warnier <ywarnier@beeznest.org>
- */
- /**
- * Code
- */
- // 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
- $language_file[] = 'learnpath';
- require_once '../inc/global.inc.php';
- require_once 'learnpath.class.php';
- require_once 'scorm.class.php';
- require_once 'aicc.class.php';
- require_once 'learnpathItem.class.php';
- require_once 'scormItem.class.php';
- require_once 'aiccItem.class.php';
- /**
- * Get one item's details
- * @param integer LP ID
- * @param integer user ID
- * @param integer View ID
- * @param integer Current item ID
- * @param integer New item ID
- */
- function switch_item_details($lp_id, $user_id, $view_id, $current_item, $next_item)
- {
- $debug = 0;
- $return = '';
- if ($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
- */
- $mylp = '';
- if (isset($_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 = $oLP;
- }
- } else {
- if ($debug > 1) {
- error_log('$_SESSION[lpobject] is NOT set', 0);
- }
- }
- $check_attempts = $mylp->check_item_attempts($next_item);
- $new_item_id = 0;
- switch ($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: '.$current_item.')', 0);
- }
- break;
- }
- if ($check_attempts) {
- $mylp->start_current_item(true);
- }
- if ($check_attempts == true && $mylp->force_commit) {
- $mylp->save_current();
- }
- if (is_object($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 = $mylpi->get_max();
- if ($mymax === '') {
- $mymax = "''";
- }
- $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();
- $mysession_time = $mylpi->get_total_time();
- $mysuspend_data = $mylpi->get_suspend_data();
- $myic = $mylpi->get_interactions_count();
- $myistring = '';
- for ($i = 0; $i < $myic; $i++) {
- $myistring .= ",[".$i.",'','','','','','','']";
- }
- if (!empty($myistring)) {
- $myistring = substr($myistring, 1);
- }
- /*
- * The following lines should reinitialize the values for the SCO
- * However, due to many complications, we are now relying more on the
- * LMSInitialize() call and its underlying lp_ajax_initialize.php call
- * so this code is technically deprecated (but the change of item_id should
- * remain). However, due to numerous technical issues with SCORM, we prefer
- * leaving it as a double-lock security. If removing, please test carefully
- * with both SCORM and proper learning path tracking.
- */
- $return .=
- "olms.score=".$myscore.";".
- "olms.max=".$mymax.";".
- "olms.min=".$mymin.";".
- "olms.lesson_status='".$mylesson_status."';".
- "olms.lesson_location='".$mylesson_location."';".
- "olms.session_time='".$mysession_time."';".
- "olms.suspend_data='".$mysuspend_data."';".
- "olms.total_time = '".$mytotal_time."';".
- "olms.mastery_score = '".$mymastery_score."';".
- "olms.max_time_allowed = '".$mymax_time_allowed."';".
- "olms.launch_data = '".$mylaunch_data."';".
- "olms.interactions = new Array(".$myistring.");".
- "olms.item_objectives = new Array();".
- "olms.G_lastError = 0;".
- "olms.G_LastErrorMessage = 'No error';";
- /*
- * and re-initialise the rest
- * -lms_lp_id
- * -lms_item_id
- * -lms_old_item_id
- * -lms_new_item_id
- * -lms_initialized
- * -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();
- $return .=
- //"saved_lesson_status='not attempted';" .
- "olms.lms_lp_id=".$lp_id.";".
- "olms.lms_item_id=".$new_item_id.";".
- "olms.lms_old_item_id=0;".
- //"lms_been_synchronized=0;" .
- "olms.lms_initialized=0;".
- //"lms_total_lessons=".$mytotal.";" .
- //"lms_complete_lessons=".$mycomplete.";" .
- //"lms_progress_bar_mode='".$myprogress_mode."';" .
- "olms.lms_view_id=".$view_id.";".
- "olms.lms_user_id=".$user_id.";".
- "olms.next_item=".$new_item_id.";".// This one is very important to replace possible literal strings.
- "olms.lms_next_item=".$mynext.";".
- "olms.lms_previous_item=".$myprevious.";".
- "olms.lms_item_type = '".$myitemtype."';".
- "olms.lms_item_credit = '".$mycredit."';".
- "olms.lms_item_lesson_mode = '".$mylesson_mode."';".
- "olms.lms_item_launch_data = '".$mylaunch_data."';".
- "olms.lms_item_interactions_count = '".$myinteractions_count."';".
- "olms.lms_item_objectives_count = '".$myinteractions_count."';".
- "olms.lms_item_core_exit = '".$mycore_exit."';".
- "olms.asset_timer = 0;";
- $return .= "update_toc('unhighlight','".$current_item."');".
- "update_toc('highlight','".$new_item_id."');".
- "update_toc('$mylesson_status','".$new_item_id."');".
- "update_progress_bar('$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($mylp->error), 0);
- error_log($return);
- }
- $_SESSION['scorm_item_id'] = $new_item_id; // Save the new item ID for the exercise tool to use.
- $_SESSION['lpobject'] = serialize($mylp);
- return $return;
- }
- echo switch_item_details($_REQUEST['lid'], $_REQUEST['uid'], $_REQUEST['vid'], $_REQUEST['iid'], $_REQUEST['next']);
- exit;
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