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<?php
require_once("$CFG->dirroot/mod/scorm/lib.php");
require_once("$CFG->libdir/filelib.php");
/// Constants and settings for module scorm
define('UPDATE_NEVER', '0');
define('UPDATE_ONCHANGE', '1');
define('UPDATE_EVERYDAY', '2');
define('UPDATE_EVERYTIME', '3');
define('SCO_ALL', 0);
define('SCO_DATA', 1);
define('SCO_ONLY', 2);
define('GRADESCOES', '0');
define('GRADEHIGHEST', '1');
define('GRADEAVERAGE', '2');
define('GRADESUM', '3');
define('HIGHESTATTEMPT', '0');
define('AVERAGEATTEMPT', '1');
define('FIRSTATTEMPT', '2');
define('LASTATTEMPT', '3');
define('TOCJSLINK', 1);
define('TOCFULLURL', 2);
/// Local Library of functions for module scorm
/**
* @package mod-scorm
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class scorm_package_file_info extends file_info_stored {
public function get_parent() {
if ($this->lf->get_filepath() === '/' and $this->lf->get_filename() === '.') {
return $this->browser->get_file_info($this->context);
}
return parent::get_parent();
}
public function get_visible_name() {
if ($this->lf->get_filepath() === '/' and $this->lf->get_filename() === '.') {
return $this->topvisiblename;
}
return parent::get_visible_name();
}
}
/**
* Returns an array of the popup options for SCORM and each options default value
*
* @return array an array of popup options as the key and their defaults as the value
*/
function scorm_get_popup_options_array(){
global $CFG;
$cfg_scorm = get_config('scorm');
return array('resizable'=> isset($cfg_scorm->resizable) ? $cfg_scorm->resizable : 0,
'scrollbars'=> isset($cfg_scorm->scrollbars) ? $cfg_scorm->scrollbars : 0,
'directories'=> isset($cfg_scorm->directories) ? $cfg_scorm->directories : 0,
'location'=> isset($cfg_scorm->location) ? $cfg_scorm->location : 0,
'menubar'=> isset($cfg_scorm->menubar) ? $cfg_scorm->menubar : 0,
'toolbar'=> isset($cfg_scorm->toolbar) ? $cfg_scorm->toolbar : 0,
'status'=> isset($cfg_scorm->status) ? $cfg_scorm->status : 0);
}
/**
* Returns an array of the array of what grade options
*
* @return array an array of what grade options
*/
function scorm_get_grade_method_array(){
return array (GRADESCOES => get_string('gradescoes', 'scorm'),
GRADEHIGHEST => get_string('gradehighest', 'scorm'),
GRADEAVERAGE => get_string('gradeaverage', 'scorm'),
GRADESUM => get_string('gradesum', 'scorm'));
}
/**
* Returns an array of the array of what grade options
*
* @return array an array of what grade options
*/
function scorm_get_what_grade_array(){
return array (HIGHESTATTEMPT => get_string('highestattempt', 'scorm'),
AVERAGEATTEMPT => get_string('averageattempt', 'scorm'),
FIRSTATTEMPT => get_string('firstattempt', 'scorm'),
LASTATTEMPT => get_string('lastattempt', 'scorm'));
}
/**
* Returns an array of the array of skip view options
*
* @return array an array of skip view options
*/
function scorm_get_skip_view_array(){
return array(0 => get_string('never'),
1 => get_string('firstaccess','scorm'),
2 => get_string('always'));
}
/**
* Returns an array of the array of hide table of contents options
*
* @return array an array of hide table of contents options
*/
function scorm_get_hidetoc_array(){
return array(0 =>get_string('sided','scorm'),
1 => get_string('hidden','scorm'),
2 => get_string('popupmenu','scorm'));
}
/**
* Returns an array of the array of update frequency options
*
* @return array an array of update frequency options
*/
function scorm_get_updatefreq_array(){
return array(0 => get_string('never'),
1 => get_string('onchanges','scorm'),
2 => get_string('everyday','scorm'),
3 => get_string('everytime','scorm'));
}
/**
* Returns an array of the array of popup display options
*
* @return array an array of popup display options
*/
function scorm_get_popup_display_array(){
return array(0 => get_string('currentwindow', 'scorm'),
1 => get_string('popup', 'scorm'));
}
/**
* Returns an array of the array of attempt options
*
* @return array an array of attempt options
*/
function scorm_get_attempts_array(){
$attempts = array(0 => get_string('nolimit','scorm'),
1 => get_string('attempt1','scorm'));
for ($i=2; $i<=6; $i++) {
$attempts[$i] = get_string('attemptsx','scorm', $i);
}
return $attempts;
}
/**
* Extracts scrom package, sets up all variables.
* Called whenever scorm changes
* @param object $scorm instance - fields are updated and changes saved into database
* @param bool $full force full update if true
* @return void
*/
function scorm_parse($scorm, $full) {
global $CFG, $DB;
$cfg_scorm = get_config('scorm');
if (!isset($scorm->cmid)) {
$cm = get_coursemodule_from_instance('scorm', $scorm->id);
$scorm->cmid = $cm->id;
}
$context = get_context_instance(CONTEXT_MODULE, $scorm->cmid);
$newhash = $scorm->sha1hash;
if ($scorm->scormtype === SCORM_TYPE_LOCAL or $scorm->scormtype === SCORM_TYPE_LOCALSYNC) {
$fs = get_file_storage();
$packagefile = false;
if ($scorm->scormtype === SCORM_TYPE_LOCAL) {
if ($packagefile = $fs->get_file($context->id, 'mod_scorm', 'package', 0, '/', $scorm->reference)) {
$newhash = $packagefile->get_contenthash();
} else {
$newhash = null;
}
} else {
if (!$cfg_scorm->allowtypelocalsync) {
// sorry - localsync disabled
return;
}
if ($scorm->reference !== '' and (!$full or $scorm->sha1hash !== sha1($scorm->reference))) {
$fs->delete_area_files($context->id, 'mod_scorm', 'package');
$file_record = array('contextid'=>$context->id, 'component'=>'mod_scorm', 'filearea'=>'package', 'itemid'=>0, 'filepath'=>'/');
if ($packagefile = $fs->create_file_from_url($file_record, $scorm->reference, array('calctimeout' => true))) {
$newhash = sha1($scorm->reference);
} else {
$newhash = null;
}
}
}
if ($packagefile) {
if (!$full and $packagefile and $scorm->sha1hash === $newhash) {
if (strpos($scorm->version, 'SCORM') !== false) {
if ($fs->get_file($context->id, 'mod_scorm', 'content', 0, '/', 'imsmanifest.xml')) {
// no need to update
return;
}
} else if (strpos($scorm->version, 'AICC') !== false) {
// TODO: add more sanity checks - something really exists in scorm_content area
return;
}
}
// now extract files
$fs->delete_area_files($context->id, 'mod_scorm', 'content');
$packer = get_file_packer('application/zip');
$packagefile->extract_to_storage($packer, $context->id, 'mod_scorm', 'content', 0, '/');
} else if (!$full) {
return;
}
if ($manifest = $fs->get_file($context->id, 'mod_scorm', 'content', 0, '/', 'imsmanifest.xml')) {
require_once("$CFG->dirroot/mod/scorm/datamodels/scormlib.php");
// SCORM
if (!scorm_parse_scorm($scorm, $manifest)) {
$scorm->version = 'ERROR';
}
} else {
require_once("$CFG->dirroot/mod/scorm/datamodels/aicclib.php");
// AICC
if (!scorm_parse_aicc($scorm)) {
$scorm->version = 'ERROR';
}
}
} else if ($scorm->scormtype === SCORM_TYPE_EXTERNAL and $cfg_scorm->allowtypeexternal) {
if (!$full and $scorm->sha1hash === sha1($scorm->reference)) {
return;
}
require_once("$CFG->dirroot/mod/scorm/datamodels/scormlib.php");
// SCORM only, AICC can not be external
if (!scorm_parse_scorm($scorm, $scorm->reference)) {
$scorm->version = 'ERROR';
}
$newhash = sha1($scorm->reference);
} else if ($scorm->scormtype === SCORM_TYPE_IMSREPOSITORY and !empty($CFG->repositoryactivate) and $cfg_scorm->allowtypeimsrepository) {
if (!$full and $scorm->sha1hash === sha1($scorm->reference)) {
return;
}
require_once("$CFG->dirroot/mod/scorm/datamodels/scormlib.php");
if (!scorm_parse_scorm($scorm, $CFG->repository.substr($scorm->reference,1).'/imsmanifest.xml')) {
$scorm->version = 'ERROR';
}
$newhash = sha1($scorm->reference);
} else {
// sorry, disabled type
return;
}
$scorm->revision++;
$scorm->sha1hash = $newhash;
$DB->update_record('scorm', $scorm);
}
function scorm_array_search($item, $needle, $haystacks, $strict=false) {
if (!empty($haystacks)) {
foreach ($haystacks as $key => $element) {
if ($strict) {
if ($element->{$item} === $needle) {
return $key;
}
} else {
if ($element->{$item} == $needle) {
return $key;
}
}
}
}
return false;
}
function scorm_repeater($what, $times) {
if ($times <= 0) {
return null;
}
$return = '';
for ($i=0; $i<$times;$i++) {
$return .= $what;
}
return $return;
}
function scorm_external_link($link) {
// check if a link is external
$result = false;
$link = strtolower($link);
if (substr($link,0,7) == 'http://') {
$result = true;
} else if (substr($link,0,8) == 'https://') {
$result = true;
} else if (substr($link,0,4) == 'www.') {
$result = true;
}
return $result;
}
/**
* Returns an object containing all datas relative to the given sco ID
*
* @param integer $id The sco ID
* @return mixed (false if sco id does not exists)
*/
function scorm_get_sco($id,$what=SCO_ALL) {
global $DB;
if ($sco = $DB->get_record('scorm_scoes', array('id'=>$id))) {
$sco = ($what == SCO_DATA) ? new stdClass() : $sco;
if (($what != SCO_ONLY) && ($scodatas = $DB->get_records('scorm_scoes_data', array('scoid'=>$id)))) {
foreach ($scodatas as $scodata) {
$sco->{$scodata->name} = $scodata->value;
}
} else if (($what != SCO_ONLY) && (!($scodatas = $DB->get_records('scorm_scoes_data', array('scoid'=>$id))))) {
$sco->parameters = '';
}
return $sco;
} else {
return false;
}
}
/**
* Returns an object (array) containing all the scoes data related to the given sco ID
*
* @param integer $id The sco ID
* @param integer $organisation an organisation ID - defaults to false if not required
* @return mixed (false if there are no scoes or an array)
*/
function scorm_get_scoes($id,$organisation=false) {
global $DB;
$organizationsql = '';
$queryarray = array('scorm'=>$id);
if (!empty($organisation)) {
$queryarray['organization'] = $organisation;
}
if ($scoes = $DB->get_records('scorm_scoes', $queryarray, 'id ASC')) {
// drop keys so that it is a simple array as expected
$scoes = array_values($scoes);
foreach ($scoes as $sco) {
if ($scodatas = $DB->get_records('scorm_scoes_data',array('scoid'=>$sco->id))) {
foreach ($scodatas as $scodata) {
$sco->{$scodata->name} = $scodata->value;
}
}
}
return $scoes;
} else {
return false;
}
}
function scorm_insert_track($userid,$scormid,$scoid,$attempt,$element,$value,$forcecompleted=false) {
global $DB, $CFG;
$id = null;
if ($forcecompleted) {
//TODO - this could be broadened to encompass SCORM 2004 in future
if (($element == 'cmi.core.lesson_status') && ($value == 'incomplete')) {
if ($track = $DB->get_record_select('scorm_scoes_track','userid=? AND scormid=? AND scoid=? AND attempt=? AND element=\'cmi.core.score.raw\'', array($userid, $scormid, $scoid, $attempt))) {
$value = 'completed';
}
}
if ($element == 'cmi.core.score.raw') {
if ($tracktest = $DB->get_record_select('scorm_scoes_track','userid=? AND scormid=? AND scoid=? AND attempt=? AND element=\'cmi.core.lesson_status\'', array($userid, $scormid, $scoid, $attempt))) {
if ($tracktest->value == "incomplete") {
$tracktest->value = "completed";
$DB->update_record('scorm_scoes_track',$tracktest);
}
}
}
}
if ($track = $DB->get_record('scorm_scoes_track',array('userid'=>$userid, 'scormid'=>$scormid, 'scoid'=>$scoid, 'attempt'=>$attempt, 'element'=>$element))) {
if ($element != 'x.start.time' ) { //don't update x.start.time - keep the original value.
$track->value = $value;
$track->timemodified = time();
$DB->update_record('scorm_scoes_track',$track);
$id = $track->id;
}
} else {
$track->userid = $userid;
$track->scormid = $scormid;
$track->scoid = $scoid;
$track->attempt = $attempt;
$track->element = $element;
$track->value = $value;
$track->timemodified = time();
$id = $DB->insert_record('scorm_scoes_track',$track);
}
if (strstr($element, '.score.raw') ||
(($element == 'cmi.core.lesson_status' || $element == 'cmi.completion_status') && ($track->value == 'completed' || $track->value == 'passed'))) {
$scorm = $DB->get_record('scorm', array('id' => $scormid));
include_once($CFG->dirroot.'/mod/scorm/lib.php');
scorm_update_grades($scorm, $userid);
}
return $id;
}
function scorm_get_tracks($scoid,$userid,$attempt='') {
/// Gets all tracks of specified sco and user
global $CFG, $DB;
if (empty($attempt)) {
if ($scormid = $DB->get_field('scorm_scoes','scorm', array('id'=>$scoid))) {
$attempt = scorm_get_last_attempt($scormid,$userid);
} else {
$attempt = 1;
}
}
if ($tracks = $DB->get_records('scorm_scoes_track', array('userid'=>$userid, 'scoid'=>$scoid, 'attempt'=>$attempt),'element ASC')) {
$usertrack = new stdClass();
$usertrack->userid = $userid;
$usertrack->scoid = $scoid;
// Defined in order to unify scorm1.2 and scorm2004
$usertrack->score_raw = '';
$usertrack->status = '';
$usertrack->total_time = '00:00:00';
$usertrack->session_time = '00:00:00';
$usertrack->timemodified = 0;
foreach ($tracks as $track) {
$element = $track->element;
$usertrack->{$element} = $track->value;
switch ($element) {
case 'cmi.core.lesson_status':
case 'cmi.completion_status':
if ($track->value == 'not attempted') {
$track->value = 'notattempted';
}
$usertrack->status = $track->value;
break;
case 'cmi.core.score.raw':
case 'cmi.score.raw':
$usertrack->score_raw = (float) sprintf('%2.2f', $track->value);
break;
case 'cmi.core.session_time':
case 'cmi.session_time':
$usertrack->session_time = $track->value;
break;
case 'cmi.core.total_time':
case 'cmi.total_time':
$usertrack->total_time = $track->value;
break;
}
if (isset($track->timemodified) && ($track->timemodified > $usertrack->timemodified)) {
$usertrack->timemodified = $track->timemodified;
}
}
if (is_array($usertrack)) {
ksort($usertrack);
}
return $usertrack;
} else {
return false;
}
}
/* Find the start and finsh time for a a given SCO attempt
*
* @param int $scormid SCORM Id
* @param int $scoid SCO Id
* @param int $userid User Id
* @param int $attemt Attempt Id
*
* @return object start and finsh time EPOC secods
*
*/
function scorm_get_sco_runtime($scormid, $scoid, $userid, $attempt=1) {
global $DB;
$timedata = new stdClass();
$sql = !empty($scoid) ? "userid=$userid AND scormid=$scormid AND scoid=$scoid AND attempt=$attempt" : "userid=$userid AND scormid=$scormid AND attempt=$attempt";
$tracks = $DB->get_records_select('scorm_scoes_track',"$sql ORDER BY timemodified ASC");
if ($tracks) {
$tracks = array_values($tracks);
}
if ($tracks) {
$timedata->start = $tracks[0]->timemodified;
}
else {
$timedata->start = false;
}
if ($tracks && $track = array_pop($tracks)) {
$timedata->finish = $track->timemodified;
}
else {
$timedata->finish = $timedata->start;
}
return $timedata;
}
function scorm_get_user_data($userid) {
global $DB;
/// Gets user info required to display the table of scorm results
/// for report.php
return $DB->get_record('user', array('id'=>$userid), user_picture::fields());
}
function scorm_grade_user_attempt($scorm, $userid, $attempt=1) {
global $DB;
$attemptscore = NULL;
$attemptscore->scoes = 0;
$attemptscore->values = 0;
$attemptscore->max = 0;
$attemptscore->sum = 0;
$attemptscore->lastmodify = 0;
if (!$scoes = $DB->get_records('scorm_scoes', array('scorm'=>$scorm->id))) {
return NULL;
}
foreach ($scoes as $sco) {
if ($userdata=scorm_get_tracks($sco->id, $userid,$attempt)) {
if (($userdata->status == 'completed') || ($userdata->status == 'passed')) {
$attemptscore->scoes++;
}
if (!empty($userdata->score_raw) || (isset($scorm->type) && $scorm->type=='sco' && isset($userdata->score_raw))) {
$attemptscore->values++;
$attemptscore->sum += $userdata->score_raw;
$attemptscore->max = ($userdata->score_raw > $attemptscore->max)?$userdata->score_raw:$attemptscore->max;
if (isset($userdata->timemodified) && ($userdata->timemodified > $attemptscore->lastmodify)) {
$attemptscore->lastmodify = $userdata->timemodified;
} else {
$attemptscore->lastmodify = 0;
}
}
}
}
switch ($scorm->grademethod) {
case GRADEHIGHEST:
$score = (float) $attemptscore->max;
break;
case GRADEAVERAGE:
if ($attemptscore->values > 0) {
$score = $attemptscore->sum/$attemptscore->values;
} else {
$score = 0;
}
break;
case GRADESUM:
$score = $attemptscore->sum;
break;
case GRADESCOES:
$score = $attemptscore->scoes;
break;
default:
$score = $attemptscore->max; // Remote Learner GRADEHIGHEST is default
}
return $score;
}
function scorm_grade_user($scorm, $userid) {
// ensure we dont grade user beyond $scorm->maxattempt settings
$lastattempt = scorm_get_last_attempt($scorm->id, $userid);
if($scorm->maxattempt != 0 && $lastattempt >= $scorm->maxattempt){
$lastattempt = $scorm->maxattempt;
}
switch ($scorm->whatgrade) {
case FIRSTATTEMPT:
return scorm_grade_user_attempt($scorm, $userid, 1);
break;
case LASTATTEMPT:
return scorm_grade_user_attempt($scorm, $userid, scorm_get_last_completed_attempt($scorm->id, $userid));
break;
case HIGHESTATTEMPT:
$maxscore = 0;
for ($attempt = 1; $attempt <= $lastattempt; $attempt++) {
$attemptscore = scorm_grade_user_attempt($scorm, $userid, $attempt);
$maxscore = $attemptscore > $maxscore ? $attemptscore: $maxscore;
}
return $maxscore;
break;
case AVERAGEATTEMPT:
$attemptcount = scorm_get_attempt_count($userid, $scorm, true);
if (empty($attemptcount)) {
return 0;
} else {
$attemptcount = count($attemptcount);
}
$lastattempt = scorm_get_last_attempt($scorm->id, $userid);
$sumscore = 0;
for ($attempt = 1; $attempt <= $lastattempt; $attempt++) {
$attemptscore = scorm_grade_user_attempt($scorm, $userid, $attempt);
$sumscore += $attemptscore;
}
return round($sumscore / $attemptcount);
break;
}
}
function scorm_count_launchable($scormid,$organization='') {
global $DB;
$sqlorganization = '';
$params = array($scormid);
if (!empty($organization)) {
$sqlorganization = " AND organization=?";
$params[] = $organization;
}
return $DB->count_records_select('scorm_scoes',"scorm = ? $sqlorganization AND ".$DB->sql_isnotempty('scorm_scoes', 'launch', false, true), $params);
}
function scorm_get_last_attempt($scormid, $userid) {
global $DB;
/// Find the last attempt number for the given user id and scorm id
if ($lastattempt = $DB->get_record('scorm_scoes_track', array('userid'=>$userid, 'scormid'=>$scormid), 'max(attempt) as a')) {
if (empty($lastattempt->a)) {
return '1';
} else {
return $lastattempt->a;
}
} else {
return false;
}
}
function scorm_get_last_completed_attempt($scormid, $userid) {
global $DB;
/// Find the last attempt number for the given user id and scorm id
if ($lastattempt = $DB->get_record_select('scorm_scoes_track', "userid = ? AND scormid = ? AND (value='completed' OR value='passed')", array($userid, $scormid), 'max(attempt) as a')) {
if (empty($lastattempt->a)) {
return '1';
} else {
return $lastattempt->a;
}
} else {
return false;
}
}
function scorm_course_format_display($user,$course) {
global $CFG, $DB, $PAGE, $OUTPUT;
$strupdate = get_string('update');
$context = get_context_instance(CONTEXT_COURSE,$course->id);
echo '<div class="mod-scorm">';
if ($scorms = get_all_instances_in_course('scorm', $course)) {
// The module SCORM activity with the least id is the course
$scorm = current($scorms);
if (! $cm = get_coursemodule_from_instance('scorm', $scorm->id, $course->id)) {
print_error('invalidcoursemodule');
}
$colspan = '';
$headertext = '<table width="100%"><tr><td class="title">'.get_string('name').': <b>'.format_string($scorm->name).'</b>';
if (has_capability('moodle/course:manageactivities', $context)) {
if ($PAGE->user_is_editing()) {
// Display update icon
$path = $CFG->wwwroot.'/course';
$headertext .= '<span class="commands">'.
'<a title="'.$strupdate.'" href="'.$path.'/mod.php?update='.$cm->id.'&amp;sesskey='.sesskey().'">'.
'<img src="'.$OUTPUT->pix_url('t/edit') . '" class="iconsmall" alt="'.$strupdate.'" /></a></span>';
}
$headertext .= '</td>';
// Display report link
$trackedusers = $DB->get_record('scorm_scoes_track', array('scormid'=>$scorm->id), 'count(distinct(userid)) as c');
if ($trackedusers->c > 0) {
$headertext .= '<td class="reportlink">'.
'<a href="'.$CFG->wwwroot.'/mod/scorm/report.php?id='.$cm->id.'">'.
get_string('viewallreports','scorm',$trackedusers->c).'</a>';
} else {
$headertext .= '<td class="reportlink">'.get_string('noreports','scorm');
}
$colspan = ' colspan="2"';
}
$headertext .= '</td></tr><tr><td'.$colspan.'>'.get_string('summary').':<br />'.format_module_intro('scorm', $scorm, $scorm->coursemodule).'</td></tr></table>';
echo $OUTPUT->box($headertext,'generalbox boxwidthwide');
scorm_view_display($user, $scorm, 'view.php?id='.$course->id, $cm);
} else {
if (has_capability('moodle/course:update', $context)) {
// Create a new activity
$url = new moodle_url('/course/mod.php', array('id'=>$course->id, 'section'=>'0', 'sesskey'=>sesskey(),'add'=>'scorm'));
redirect($url);
} else {
echo $OUTPUT->notification('Could not find a scorm course here');
}
}
echo '</div>';
}
function scorm_view_display ($user, $scorm, $action, $cm) {
global $CFG, $DB, $PAGE, $OUTPUT;
if ($scorm->updatefreq == UPDATE_EVERYTIME) {
scorm_parse($scorm, false);
}
$organization = optional_param('organization', '', PARAM_INT);
if($scorm->displaycoursestructure == 1) {
echo $OUTPUT->box_start('generalbox boxaligncenter toc');
?>
<div class="structurehead"><?php print_string('contents','scorm') ?></div>
<?php
}
if (empty($organization)) {
$organization = $scorm->launch;
}
if ($orgs = $DB->get_records_select_menu('scorm_scoes', 'scorm = ? AND '.
$DB->sql_isempty('scorm_scoes', 'launch', false, true).' AND '.
$DB->sql_isempty('scorm_scoes', 'organization', false, false),
array($scorm->id),'id','id,title')) {
if (count($orgs) > 1) {
$select = new single_select(new moodle_url($action), 'organization', $orgs, $organization, null);
$select->label = get_string('organizations','scorm');
$select->class = 'scorm-center';
echo $OUTPUT->render($select);
}
}
$orgidentifier = '';
if ($sco = scorm_get_sco($organization, SCO_ONLY)) {
if (($sco->organization == '') && ($sco->launch == '')) {
$orgidentifier = $sco->identifier;
} else {
$orgidentifier = $sco->organization;
}
}
$scorm->version = strtolower(clean_param($scorm->version, PARAM_SAFEDIR)); // Just to be safe
if (!file_exists($CFG->dirroot.'/mod/scorm/datamodels/'.$scorm->version.'lib.php')) {
$scorm->version = 'scorm_12';
}
require_once($CFG->dirroot.'/mod/scorm/datamodels/'.$scorm->version.'lib.php');
$result = scorm_get_toc($user,$scorm,$cm->id,TOCFULLURL,$orgidentifier);
$incomplete = $result->incomplete;
// do we want the TOC to be displayed?
if($scorm->displaycoursestructure == 1) {
echo $result->toc;
echo $OUTPUT->box_end();
}
// is this the first attempt ?
$attemptcount = scorm_get_attempt_count($user->id, $scorm);
// do not give the player launch FORM if the SCORM object is locked after the final attempt
if ($scorm->lastattemptlock == 0 || $result->attemptleft > 0) {
?>
<div class="scorm-center">
<form id="theform" method="post" action="<?php echo $CFG->wwwroot ?>/mod/scorm/player.php">
<?php
if ($scorm->hidebrowse == 0) {
print_string('mode','scorm');
echo ': <input type="radio" id="b" name="mode" value="browse" /><label for="b">'.get_string('browse','scorm').'</label>'."\n";
echo '<input type="radio" id="n" name="mode" value="normal" checked="checked" /><label for="n">'.get_string('normal','scorm')."</label>\n";
} else {
echo '<input type="hidden" name="mode" value="normal" />'."\n";
}
if ($scorm->forcenewattempt == 1) {
if ($incomplete === false) {
echo '<input type="hidden" name="newattempt" value="on" />'."\n";
}
} elseif (!empty($attemptcount) && ($incomplete === false) && (($result->attemptleft > 0)||($scorm->maxattempt == 0))) {
?>
<br />
<input type="checkbox" id="a" name="newattempt" />
<label for="a"><?php print_string('newattempt','scorm') ?></label>
<?php
}
?>
<br />
<input type="hidden" name="scoid"/>
<input type="hidden" name="cm" value="<?php echo $cm->id ?>"/>
<input type="hidden" name="currentorg" value="<?php echo $orgidentifier ?>" />
<input type="submit" value="<?php print_string('enter','scorm') ?>" />
</form>
</div>
<?php
}
}
function scorm_simple_play($scorm,$user, $context) {
global $DB;
$result = false;
if ($scorm->updatefreq == UPDATE_EVERYTIME) {
scorm_parse($scorm, false);
}
if (has_capability('mod/scorm:viewreport', $context)) { //if this user can view reports, don't skipview so they can see links to reports.
return $result;
}
$scoes = $DB->get_records_select('scorm_scoes', 'scorm = ? AND '.$DB->sql_isnotempty('scorm_scoes', 'launch', false, true), array($scorm->id), 'id', 'id');
if ($scoes) {
if ($scorm->skipview >= 1) {
$sco = current($scoes);
if (scorm_get_tracks($sco->id,$user->id) === false) {
header('Location: player.php?a='.$scorm->id.'&scoid='.$sco->id);
$result = true;
} else if ($scorm->skipview == 2) {
header('Location: player.php?a='.$scorm->id.'&scoid='.$sco->id);
$result = true;
}
}
}
return $result;
}
function scorm_get_count_users($scormid, $groupingid=null) {
global $CFG, $DB;
if (!empty($groupingid)) {
$sql = "SELECT COUNT(DISTINCT st.userid)
FROM {scorm_scoes_track} st
INNER JOIN {groups_members} gm ON st.userid = gm.userid
INNER JOIN {groupings_groups} gg ON gm.groupid = gg.groupid
WHERE st.scormid = ? AND gg.groupingid = ?
";
$params = array($scormid, $groupingid);
} else {
$sql = "SELECT COUNT(DISTINCT st.userid)
FROM {scorm_scoes_track} st
WHERE st.scormid = ?
";
$params = array($scormid);
}
return ($DB->count_records_sql($sql, $params));
}
/**
* Build up the JavaScript representation of an array element
*
* @param string $sversion SCORM API version
* @param array $userdata User track data
* @param string $element_name Name of array element to get values for
* @param array $children list of sub elements of this array element that also need instantiating
* @return None
*/
function scorm_reconstitute_array_element($sversion, $userdata, $element_name, $children) {
// reconstitute comments_from_learner and comments_from_lms
$current = '';
$current_subelement = '';
$current_sub = '';
$count = 0;
$count_sub = 0;
$scormseperator = '_';
if ($sversion == 'scorm_13') { //scorm 1.3 elements use a . instead of an _
$scormseperator = '.';
}
// filter out the ones we want
$element_list = array();
foreach($userdata as $element => $value){
if (substr($element,0,strlen($element_name)) == $element_name) {
$element_list[$element] = $value;
}
}
// sort elements in .n array order
uksort($element_list, "scorm_element_cmp");
// generate JavaScript
foreach($element_list as $element => $value){
if ($sversion == 'scorm_13') {
$element = preg_replace('/\.(\d+)\./', ".N\$1.", $element);
preg_match('/\.(N\d+)\./', $element, $matches);
} else {
$element = preg_replace('/\.(\d+)\./', "_\$1.", $element);
preg_match('/\_(\d+)\./', $element, $matches);
}
if (count($matches) > 0 && $current != $matches[1]) {
if ($count_sub > 0) {
echo ' '.$element_name.$scormseperator.$current.'.'.$current_subelement.'._count = '.$count_sub.";\n";
}
$current = $matches[1];
$count++;
$current_subelement = '';
$current_sub = '';
$count_sub = 0;
$end = strpos($element,$matches[1])+strlen($matches[1]);
$subelement = substr($element,0,$end);
echo ' '.$subelement." = new Object();\n";
// now add the children
foreach ($children as $child) {
echo ' '.$subelement.".".$child." = new Object();\n";
echo ' '.$subelement.".".$child."._children = ".$child."_children;\n";
}
}
// now - flesh out the second level elements if there are any
if ($sversion == 'scorm_13') {
$element = preg_replace('/(.*?\.N\d+\..*?)\.(\d+)\./', "\$1.N\$2.", $element);
preg_match('/.*?\.N\d+\.(.*?)\.(N\d+)\./', $element, $matches);
} else {
$element = preg_replace('/(.*?\_\d+\..*?)\.(\d+)\./', "\$1_\$2.", $element);
preg_match('/.*?\_\d+\.(.*?)\_(\d+)\./', $element, $matches);
}
// check the sub element type
if (count($matches) > 0 && $current_subelement != $matches[1]) {
if ($count_sub > 0) {
echo ' '.$element_name.$scormseperator.$current.'.'.$current_subelement.'._count = '.$count_sub.";\n";
}
$current_subelement = $matches[1];
$current_sub = '';
$count_sub = 0;
$end = strpos($element,$matches[1])+strlen($matches[1]);
$subelement = substr($element,0,$end);
echo ' '.$subelement." = new Object();\n";
}
// now check the subelement subscript
if (count($matches) > 0 && $current_sub != $matches[2]) {
$current_sub = $matches[2];
$count_sub++;
$end = strrpos($element,$matches[2])+strlen($matches[2]);
$subelement = substr($element,0,$end);
echo ' '.$subelement." = new Object();\n";
}
echo ' '.$element.' = \''.$value."';\n";
}
if ($count_sub > 0) {
echo ' '.$element_name.$scormseperator.$current.'.'.$current_subelement.'._count = '.$count_sub.";\n";
}
if ($count > 0) {
echo ' '.$element_name.'._count = '.$count.";\n";
}
}
/**
* Build up the JavaScript representation of an array element
*
* @param string $a left array element
* @param string $b right array element
* @return comparator - 0,1,-1
*/
function scorm_element_cmp($a, $b) {
preg_match('/.*?(\d+)\./', $a, $matches);
$left = intval($matches[1]);
preg_match('/.?(\d+)\./', $b, $matches);
$right = intval($matches[1]);
if ($left < $right) {
return -1; // smaller
} elseif ($left > $right) {
return 1; // bigger
} else {
// look for a second level qualifier eg cmi.interactions_0.correct_responses_0.pattern
if (preg_match('/.*?(\d+)\.(.*?)\.(\d+)\./', $a, $matches)) {
$leftterm = intval($matches[2]);
$left = intval($matches[3]);
if (preg_match('/.*?(\d+)\.(.*?)\.(\d+)\./', $b, $matches)) {
$rightterm = intval($matches[2]);
$right = intval($matches[3]);
if ($leftterm < $rightterm) {
return -1; // smaller
} elseif ($leftterm > $rightterm) {
return 1; // bigger
} else {
if ($left < $right) {
return -1; // smaller
} elseif ($left > $right) {
return 1; // bigger
}
}
}
}
// fall back for no second level matches or second level matches are equal
return 0; // equal to
}
}
/**
* Generate the user attempt status string
*
* @param object $user Current context user
* @param object $scorm a moodle scrom object - mdl_scorm
* @return string - Attempt status string
*/
function scorm_get_attempt_status($user, $scorm) {
global $DB;
$attempts = scorm_get_attempt_count($user->id, $scorm, true);
if(empty($attempts)) {
$attemptcount = 0;
} else {
$attemptcount = count($attempts);
}
$result = '<p>'.get_string('noattemptsallowed', 'scorm').': ';
if ($scorm->maxattempt > 0) {
$result .= $scorm->maxattempt . '<br />';
} else {
$result .= get_string('unlimited').'<br />';
}
$result .= get_string('noattemptsmade', 'scorm').': ' . $attemptcount . '<br />';
if ($scorm->maxattempt == 1) {
switch ($scorm->grademethod) {
case GRADEHIGHEST:
$grademethod = get_string('gradehighest', 'scorm');
break;
case GRADEAVERAGE:
$grademethod = get_string('gradeaverage', 'scorm');
break;
case GRADESUM:
$grademethod = get_string('gradesum', 'scorm');
break;
case GRADESCOES:
$grademethod = get_string('gradescoes', 'scorm');
break;
}
} else {
switch ($scorm->whatgrade) {
case HIGHESTATTEMPT:
$grademethod = get_string('highestattempt', 'scorm');
break;
case AVERAGEATTEMPT:
$grademethod = get_string('averageattempt', 'scorm');
break;
case FIRSTATTEMPT:
$grademethod = get_string('firstattempt', 'scorm');
break;
case LASTATTEMPT:
$grademethod = get_string('lastattempt', 'scorm');
break;
}
}
if(!empty($attempts)) {
$i = 1;
foreach($attempts as $attempt) {
$gradereported = scorm_grade_user_attempt($scorm, $user->id, $attempt->attemptnumber);
if ($scorm->grademethod !== GRADESCOES && !empty($scorm->maxgrade)) {
$gradereported = $gradereported/$scorm->maxgrade;
$gradereported = number_format($gradereported*100, 0) .'%';
}
$result .= get_string('gradeforattempt', 'scorm').' ' . $i . ': ' . $gradereported .'<br />';
$i++;
}
}
$calculatedgrade = scorm_grade_user($scorm, $user->id);
if ($scorm->grademethod !== GRADESCOES && !empty($scorm->maxgrade)) {
$calculatedgrade = $calculatedgrade/$scorm->maxgrade;
$calculatedgrade = number_format($calculatedgrade*100, 0) .'%';
}
$result .= get_string('grademethod', 'scorm'). ': ' . $grademethod;
if(empty($attempts)) {
$result .= '<br />' . get_string('gradereported','scorm') . ': ' . get_string('none') . '<br />';
} else {
$result .= '<br />' . get_string('gradereported','scorm') . ': ' . $calculatedgrade . '<br />';
}
$result .= '</p>';
if ($attemptcount >= $scorm->maxattempt and $scorm->maxattempt > 0) {
$result .= '<p><font color="#cc0000">'.get_string('exceededmaxattempts','scorm').'</font></p>';
}
return $result;
}
/**
* Get SCORM attempt count
*
* @param object $user Current context user
* @param object $scorm a moodle scrom object - mdl_scorm
* @param bool $attempts return the list of attempts
* @return int - no. of attempts so far
*/
function scorm_get_attempt_count($userid, $scorm, $attempts_only=false) {
global $DB;
$attemptcount = 0;
$element = 'cmi.core.score.raw';
if ($scorm->grademethod == GRADESCOES) {
$element = 'cmi.core.lesson_status';
}
if ($scorm->version == 'scorm1_3') {
$element = 'cmi.score.raw';
}
$attempts = $DB->get_records_select('scorm_scoes_track',"element=? AND userid=? AND scormid=?", array($element, $userid, $scorm->id),'attempt','DISTINCT attempt AS attemptnumber');
if ($attempts_only) {
return $attempts;
}
if(!empty($attempts)) {
$attemptcount = count($attempts);
}
return $attemptcount;
}
/**
* Figure out with this is a debug situation
*
* @param object $scorm a moodle scrom object - mdl_scorm
* @return boolean - debugging true/false
*/
function scorm_debugging($scorm) {
global $CFG, $USER;
$cfg_scorm = get_config('scorm');
if (!$cfg_scorm->allowapidebug) {
return false;
}
$identifier = $USER->username.':'.$scorm->name;
$test = $cfg_scorm->apidebugmask;
// check the regex is only a short list of safe characters
if (!preg_match('/^[\w\s\*\.\?\+\:\_\\\]+$/', $test)) {
return false;
}
$res = false;
eval('$res = preg_match(\'/^'.$test.'/\', $identifier) ? true : false;');
return $res;
}
/**
* Delete Scorm tracks for selected users
*
* @param array $attemptids list of attempts that need to be deleted
* @param int $scorm instance
*
* return bool true deleted all responses, false failed deleting an attempt - stopped here
*/
function scorm_delete_responses($attemptids, $scorm) {
if(!is_array($attemptids) || empty($attemptids)) {
return false;
}
foreach($attemptids as $num => $attemptid) {
if(empty($attemptid)) {
unset($attemptids[$num]);
}
}
foreach($attemptids as $attempt) {
$keys = explode(':', $attempt);
if (count($keys) == 2) {
$userid = clean_param($keys[0], PARAM_INT);
$attemptid = clean_param($keys[1], PARAM_INT);
if (!$userid || !$attemptid || !scorm_delete_attempt($userid, $scorm, $attemptid)) {
return false;
}
} else {
return false;
}
}
return true;
}
/**
* Delete Scorm tracks for selected users
*
* @param int $userid ID of User
* @param int $scormid ID of Scorm
* @param int $attemptid user attempt that need to be deleted
*
* return bool true suceeded
*/
function scorm_delete_attempt($userid, $scorm, $attemptid) {
global $DB;
$DB->delete_records('scorm_scoes_track', array('userid' => $userid, 'scormid' => $scorm->id, 'attempt' => $attemptid));
include_once('lib.php');
scorm_update_grades($scorm, $userid, true);
return true;
}
/**
* Converts SCORM duration notation to human-readable format
* The function works with both SCORM 1.2 and SCORM 2004 time formats
* @param $duration string SCORM duration
* @return string human-readable date/time
*/
function scorm_format_duration($duration) {
// fetch date/time strings
$stryears = get_string('years');
$strmonths = get_string('nummonths');
$strdays = get_string('days');
$strhours = get_string('hours');
$strminutes = get_string('minutes');
$strseconds = get_string('seconds');
if ($duration[0] == 'P') {
// if timestamp starts with 'P' - it's a SCORM 2004 format
// this regexp discards empty sections, takes Month/Minute ambiguity into consideration,
// and outputs filled sections, discarding leading zeroes and any format literals
// also saves the only zero before seconds decimals (if there are any) and discards decimals if they are zero
$pattern = array( '#([A-Z])0+Y#', '#([A-Z])0+M#', '#([A-Z])0+D#', '#P(|\d+Y)0*(\d+)M#', '#0*(\d+)Y#', '#0*(\d+)D#', '#P#',
'#([A-Z])0+H#', '#([A-Z])[0.]+S#', '#\.0+S#', '#T(|\d+H)0*(\d+)M#', '#0*(\d+)H#', '#0+\.(\d+)S#', '#0*([\d.]+)S#', '#T#' );
$replace = array( '$1', '$1', '$1', '$1$2 '.$strmonths.' ', '$1 '.$stryears.' ', '$1 '.$strdays.' ', '',
'$1', '$1', 'S', '$1$2 '.$strminutes.' ', '$1 '.$strhours.' ', '0.$1 '.$strseconds, '$1 '.$strseconds, '');
} else {
// else we have SCORM 1.2 format there
// first convert the timestamp to some SCORM 2004-like format for conveniency
$duration = preg_replace('#^(\d+):(\d+):([\d.]+)$#', 'T$1H$2M$3S', $duration);
// then convert in the same way as SCORM 2004
$pattern = array( '#T0+H#', '#([A-Z])0+M#', '#([A-Z])[0.]+S#', '#\.0+S#', '#0*(\d+)H#', '#0*(\d+)M#', '#0+\.(\d+)S#', '#0*([\d.]+)S#', '#T#' );
$replace = array( 'T', '$1', '$1', 'S', '$1 '.$strhours.' ', '$1 '.$strminutes.' ', '0.$1 '.$strseconds, '$1 '.$strseconds, '' );
}
$result = preg_replace($pattern, $replace, $duration);
return $result;
}
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