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192
main/lp/lp_ajax_initialize.php
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192
main/lp/lp_ajax_initialize.php
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<?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.
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* This script, in particular, enables the process of SCO's initialization. It
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* resets the JavaScript values for each SCO to the current LMS status.
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*
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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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$use_anonymous = true;
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require_once __DIR__.'/../inc/global.inc.php';
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api_protect_course_script();
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/**
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* Get one item's details.
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*
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* @param int LP ID
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* @param int user ID
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* @param int View ID
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* @param int Current item ID
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* @param int New item ID
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*
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* @return string
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*/
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function initialize_item($lp_id, $user_id, $view_id, $next_item)
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{
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$debug = 0;
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$return = '';
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if ($debug) {
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error_log('In initialize_item('.$lp_id.','.$user_id.','.$view_id.','.$next_item.')');
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}
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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, $user_id);
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$mylp->set_current_item($next_item);
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if ($debug) {
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error_log('In initialize_item() - new item is '.$next_item);
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}
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$mylp->start_current_item(true);
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if (is_object($mylp->items[$next_item])) {
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if ($debug) {
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error_log('In initialize_item - recovering existing item object '.$next_item, 0);
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}
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$mylpi = $mylp->items[$next_item];
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} else {
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if ($debug) {
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error_log('In initialize_item - generating new item object '.$next_item, 0);
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}
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$mylpi = new learnpathItem($next_item, $user_id);
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}
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if ($mylpi) {
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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 = $mylpi->get_status();
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$mytotal_time = $mylpi->get_scorm_time('js', null, true);
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$mymastery_score = $mylpi->get_mastery_score();
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$mymax_time_allowed = $mylpi->get_max_time_allowed();
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$mylaunch_data = $mylpi->get_launch_data();
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$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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// Obtention des donnees d'objectifs
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$mycoursedb = Database::get_course_table(TABLE_LP_IV_OBJECTIVE);
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$course_id = api_get_course_int_id();
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$mylp_iv_id = $mylpi->db_item_view_id;
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$phpobjectives = [];
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if (!empty($mylp_iv_id)) {
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$sql = "SELECT objective_id, status, score_raw, score_max, score_min
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FROM $mycoursedb
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WHERE lp_iv_id = $mylp_iv_id AND c_id = $course_id
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ORDER BY id ASC;";
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$res = Database::query($sql);
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while ($row = Database::fetch_row($res)) {
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$phpobjectives[] = $row;
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}
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}
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$myobjectives = json_encode($phpobjectives);
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$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.item_objectives = ".$myobjectives.";".
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"olms.G_lastError = 0;".
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"olms.G_LastErrorMessage = 'No error';".
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"olms.finishSignalReceived = 0;";
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/*
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* and re-initialise the rest (proper to the LMS)
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* -lms_lp_id
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* -lms_item_id
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* -lms_old_item_id
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* -lms_new_item_id
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* -lms_initialized
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* -lms_progress_bar_mode
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* -lms_view_id
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* -lms_user_id
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*/
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$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 = $mylpi->get_interactions_count();
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$mycore_exit = $mylpi->get_core_exit();
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$return .=
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"olms.lms_lp_id=".$lp_id.";".
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"olms.lms_item_id=".$next_item.";".
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"olms.lms_old_item_id=0;".
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"olms.lms_initialized=0;".
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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=".$next_item.";".// This one is very important to replace possible literal strings.
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"olms.lms_next_item=".$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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$mylp->set_error_msg('');
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$mylp->prerequisites_match(); // Check the prerequisites are all complete.
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if ($debug) {
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error_log('Prereq_match() returned '.htmlentities($mylp->error), 0);
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error_log("return = $return ");
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error_log("mylp->lp_view_session_id: ".$mylp->lp_view_session_id);
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}
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if (isset($mylp->lti_launch_id)) {
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$ltiLaunchId = $mylp->lti_launch_id;
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$return .= "sendLtiLaunch('$ltiLaunchId', '$lp_id');";
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}
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return $return;
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}
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echo initialize_item(
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$_POST['lid'],
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$_POST['uid'],
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$_POST['vid'],
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$_POST['iid']
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);
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