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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Library of internal classes and functions for module SCORM
*
* @package mod_scorm
* @copyright 1999 onwards Roberto Pinna
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once("$CFG->dirroot/mod/scorm/lib.php");
require_once("$CFG->libdir/filelib.php");
// Constants and settings for module scorm.
define('SCORM_UPDATE_NEVER', '0');
define('SCORM_UPDATE_EVERYDAY', '2');
define('SCORM_UPDATE_EVERYTIME', '3');
define('SCORM_SKIPVIEW_NEVER', '0');
define('SCORM_SKIPVIEW_FIRST', '1');
define('SCORM_SKIPVIEW_ALWAYS', '2');
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);
define('SCORM_FORCEATTEMPT_NO', 0);
define('SCORM_FORCEATTEMPT_ONCOMPLETE', 1);
define('SCORM_FORCEATTEMPT_ALWAYS', 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() {
$cfgscorm = get_config('scorm');
return array('scrollbars' => isset($cfgscorm->scrollbars) ? $cfgscorm->scrollbars : 0,
'directories' => isset($cfgscorm->directories) ? $cfgscorm->directories : 0,
'location' => isset($cfgscorm->location) ? $cfgscorm->location : 0,
'menubar' => isset($cfgscorm->menubar) ? $cfgscorm->menubar : 0,
'toolbar' => isset($cfgscorm->toolbar) ? $cfgscorm->toolbar : 0,
'status' => isset($cfgscorm->status) ? $cfgscorm->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(SCORM_SKIPVIEW_NEVER => get_string('never'),
SCORM_SKIPVIEW_FIRST => get_string('firstaccess', 'scorm'),
SCORM_SKIPVIEW_ALWAYS => 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(SCORM_TOC_SIDE => get_string('sided', 'scorm'),
SCORM_TOC_HIDDEN => get_string('hidden', 'scorm'),
SCORM_TOC_POPUP => get_string('popupmenu', 'scorm'),
SCORM_TOC_DISABLED => get_string('disabled', '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(SCORM_UPDATE_NEVER => get_string('never'),
SCORM_UPDATE_EVERYDAY => get_string('everyday', 'scorm'),
SCORM_UPDATE_EVERYTIME => 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 navigation buttons display options
*
* @return array an array of navigation buttons display options
*/
function scorm_get_navigation_display_array() {
return array(SCORM_NAV_DISABLED => get_string('no'),
SCORM_NAV_UNDER_CONTENT => get_string('undercontent', 'scorm'),
SCORM_NAV_FLOATING => get_string('floating', '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;
}
/**
* Returns an array of the attempt status options
*
* @return array an array of attempt status options
*/
function scorm_get_attemptstatus_array() {
return array(SCORM_DISPLAY_ATTEMPTSTATUS_NO => get_string('no'),
SCORM_DISPLAY_ATTEMPTSTATUS_ALL => get_string('attemptstatusall', 'scorm'),
SCORM_DISPLAY_ATTEMPTSTATUS_MY => get_string('attemptstatusmy', 'scorm'),
SCORM_DISPLAY_ATTEMPTSTATUS_ENTRY => get_string('attemptstatusentry', 'scorm'));
}
/**
* Returns an array of the force attempt options
*
* @return array an array of attempt options
*/
function scorm_get_forceattempt_array() {
return array(SCORM_FORCEATTEMPT_NO => get_string('no'),
SCORM_FORCEATTEMPT_ONCOMPLETE => get_string('forceattemptoncomplete', 'scorm'),
SCORM_FORCEATTEMPT_ALWAYS => get_string('forceattemptalways', 'scorm'));
}
/**
* 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;
$cfgscorm = get_config('scorm');
if (!isset($scorm->cmid)) {
$cm = get_coursemodule_from_instance('scorm', $scorm->id);
$scorm->cmid = $cm->id;
}
$context = context_module::instance($scorm->cmid);
$newhash = $scorm->sha1hash;
if ($scorm->scormtype === SCORM_TYPE_LOCAL or $scorm->scormtype === SCORM_TYPE_LOCALSYNC) {
$fs = get_file_storage();
$packagefile = false;
$packagefileimsmanifest = false;
if ($scorm->scormtype === SCORM_TYPE_LOCAL) {
if ($packagefile = $fs->get_file($context->id, 'mod_scorm', 'package', 0, '/', $scorm->reference)) {
if ($packagefile->is_external_file()) { // Get zip file so we can check it is correct.
$packagefile->import_external_file_contents();
}
$newhash = $packagefile->get_contenthash();
if (strtolower($packagefile->get_filename()) == 'imsmanifest.xml') {
$packagefileimsmanifest = true;
}
} else {
$newhash = null;
}
} else {
if (!$cfgscorm->allowtypelocalsync) {
// Sorry - localsync disabled.
return;
}
if ($scorm->reference !== '') {
$fs->delete_area_files($context->id, 'mod_scorm', 'package');
$filerecord = array('contextid' => $context->id, 'component' => 'mod_scorm', 'filearea' => 'package',
'itemid' => 0, 'filepath' => '/');
if ($packagefile = $fs->create_file_from_url($filerecord, $scorm->reference, array('calctimeout' => true), true)) {
$newhash = $packagefile->get_contenthash();
} else {
$newhash = null;
}
}
}
if ($packagefile) {
if (!$full and $packagefile and $scorm->sha1hash === $newhash) {
if (strpos($scorm->version, 'SCORM') !== false) {
if ($packagefileimsmanifest || $fs->get_file($context->id, 'mod_scorm', 'content', 0, '/', 'imsmanifest.xml')) {
// No need to update.
return;
}
} else if (strpos($scorm->version, 'AICC') !== false) {
// TODO: add more sanity checks - something really exists in scorm_content area.
return;
}
}
if (!$packagefileimsmanifest) {
// 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 ($packagefileimsmanifest) {
require_once("$CFG->dirroot/mod/scorm/datamodels/scormlib.php");
// Direct link to imsmanifest.xml file.
if (!scorm_parse_scorm($scorm, $packagefile)) {
$scorm->version = 'ERROR';
}
} else if ($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.
$result = scorm_parse_aicc($scorm);
if (!$result) {
$scorm->version = 'ERROR';
} else {
$scorm->version = 'AICC';
}
}
} else if ($scorm->scormtype === SCORM_TYPE_EXTERNAL and $cfgscorm->allowtypeexternal) {
require_once("$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_AICCURL and $cfgscorm->allowtypeexternalaicc) {
require_once("$CFG->dirroot/mod/scorm/datamodels/aicclib.php");
// AICC.
$result = scorm_parse_aicc($scorm);
if (!$result) {
$scorm->version = 'ERROR';
} else {
$scorm->version = 'AICC';
}
} 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;
$queryarray = array('scorm' => $id);
if (!empty($organisation)) {
$queryarray['organization'] = $organisation;
}
if ($scoes = $DB->get_records('scorm_scoes', $queryarray, 'sortorder, id')) {
// 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, $trackdata = null) {
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', $tracktest);
}
}
}
if (($element == 'cmi.success_status') && ($value == 'passed' || $value == 'failed')) {
if ($DB->get_record('scorm_scoes_data', array('scoid' => $scoid, 'name' => 'objectivesetbycontent'))) {
$objectiveprogressstatus = true;
$objectivesatisfiedstatus = false;
if ($value == 'passed') {
$objectivesatisfiedstatus = true;
}
if ($track = $DB->get_record('scorm_scoes_track', array('userid' => $userid,
'scormid' => $scormid,
'scoid' => $scoid,
'attempt' => $attempt,
'element' => 'objectiveprogressstatus'))) {
$track->value = $objectiveprogressstatus;
$track->timemodified = time();
$DB->update_record('scorm_scoes_track', $track);
$id = $track->id;
} else {
$track = new stdClass();
$track->userid = $userid;
$track->scormid = $scormid;
$track->scoid = $scoid;
$track->attempt = $attempt;
$track->element = 'objectiveprogressstatus';
$track->value = $objectiveprogressstatus;
$track->timemodified = time();
$id = $DB->insert_record('scorm_scoes_track', $track);
}
if ($objectivesatisfiedstatus) {
if ($track = $DB->get_record('scorm_scoes_track', array('userid' => $userid,
'scormid' => $scormid,
'scoid' => $scoid,
'attempt' => $attempt,
'element' => 'objectivesatisfiedstatus'))) {
$track->value = $objectivesatisfiedstatus;
$track->timemodified = time();
$DB->update_record('scorm_scoes_track', $track);
$id = $track->id;
} else {
$track = new stdClass();
$track->userid = $userid;
$track->scormid = $scormid;
$track->scoid = $scoid;
$track->attempt = $attempt;
$track->element = 'objectivesatisfiedstatus';
$track->value = $objectivesatisfiedstatus;
$track->timemodified = time();
$id = $DB->insert_record('scorm_scoes_track', $track);
}
}
}
}
}
$track = null;
if ($trackdata !== null) {
if (isset($trackdata[$element])) {
$track = $trackdata[$element];
}
} else {
$track = $DB->get_record('scorm_scoes_track', array('userid' => $userid,
'scormid' => $scormid,
'scoid' => $scoid,
'attempt' => $attempt,
'element' => $element));
}
if ($track) {
if ($element != 'x.start.time' ) { // Don't update x.start.time - keep the original value.
if ($track->value != $value) {
$track->value = $value;
$track->timemodified = time();
$DB->update_record('scorm_scoes_track', $track);
}
$id = $track->id;
}
} else {
$track = new stdClass();
$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);
$track->id = $id;
}
// Trigger updating grades based on a given set of SCORM CMI elements.
$scorm = false;
if (in_array($element, array('cmi.core.score.raw', 'cmi.score.raw')) ||
(in_array($element, array('cmi.completion_status', 'cmi.core.lesson_status', 'cmi.success_status'))
&& in_array($track->value, array('completed', 'passed')))) {
$scorm = $DB->get_record('scorm', array('id' => $scormid));
include_once($CFG->dirroot.'/mod/scorm/lib.php');
scorm_update_grades($scorm, $userid);
}
// Trigger CMI element events.
if (in_array($element, array('cmi.core.score.raw', 'cmi.score.raw')) ||
(in_array($element, array('cmi.completion_status', 'cmi.core.lesson_status', 'cmi.success_status'))
&& in_array($track->value, array('completed', 'failed', 'passed')))) {
if (!$scorm) {
$scorm = $DB->get_record('scorm', array('id' => $scormid));
}
$cm = get_coursemodule_from_instance('scorm', $scormid);
$data = array(
'other' => array('attemptid' => $attempt, 'cmielement' => $element, 'cmivalue' => $track->value),
'objectid' => $scorm->id,
'context' => context_module::instance($cm->id),
'relateduserid' => $userid
);
if (in_array($element, array('cmi.core.score.raw', 'cmi.score.raw'))) {
// Create score submitted event.
$event = \mod_scorm\event\scoreraw_submitted::create($data);
} else {
// Create status submitted event.
$event = \mod_scorm\event\status_submitted::create($data);
}
// Fix the missing track keys when the SCORM track record already exists, see $trackdata in datamodel.php.
// There, for performances reasons, columns are limited to: element, id, value, timemodified.
// Missing fields are: userid, scormid, scoid, attempt.
$track->userid = $userid;
$track->scormid = $scormid;
$track->scoid = $scoid;
$track->attempt = $attempt;
// Trigger submitted event.
$event->add_record_snapshot('scorm_scoes_track', $track);
$event->add_record_snapshot('course_modules', $cm);
$event->add_record_snapshot('scorm', $scorm);
$event->trigger();
}
return $id;
}
/**
* simple quick function to return true/false if this user has tracks in this scorm
*
* @param integer $scormid The scorm ID
* @param integer $userid the users id
* @return boolean (false if there are no tracks)
*/
function scorm_has_tracks($scormid, $userid) {
global $DB;
return $DB->record_exists('scorm_scoes_track', array('userid' => $userid, 'scormid' => $scormid));
}
function scorm_get_tracks($scoid, $userid, $attempt='') {
// Gets all tracks of specified sco and user.
global $DB;
if (empty($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')) {
$usertrack = scorm_format_interactions($tracks);
$usertrack->userid = $userid;
$usertrack->scoid = $scoid;
return $usertrack;
} else {
return false;
}
}
/**
* helper function to return a formatted list of interactions for reports.
*
* @param array $trackdata the records from scorm_scoes_track table
* @return object formatted list of interactions
*/
function scorm_format_interactions($trackdata) {
$usertrack = new stdClass();
// 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';
$usertrack->timemodified = 0;
foreach ($trackdata 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;
}
}
return $usertrack;
}
/* 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();
$params = array('userid' => $userid, 'scormid' => $scormid, 'attempt' => $attempt);
if (!empty($scoid)) {
$params['scoid'] = $scoid;
}
$tracks = $DB->get_records('scorm_scoes_track', $params, "timemodified ASC");
if ($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 $timedata;
}
function scorm_grade_user_attempt($scorm, $userid, $attempt=1) {
global $DB;
$attemptscore = new stdClass();
$attemptscore->scoes = 0;
$attemptscore->values = 0;
$attemptscore->max = 0;
$attemptscore->sum = 0;
$attemptscore->lastmodify = 0;
if (!$scoes = $DB->get_records('scorm_scoes', array('scorm' => $scorm->id), 'sortorder, id')) {
return null;
}
foreach ($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, $userid, scorm_get_first_attempt($scorm->id, $userid));
break;
case LASTATTEMPT:
return scorm_grade_user_attempt($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, $scorm, true, true);
if (empty($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);
}
/**
* Returns the last attempt used - if no attempts yet, returns 1 for first attempt
*
* @param int $scormid the id of the scorm.
* @param int $userid the id of the user.
*
* @return int The attempt number to use.
*/
function scorm_get_last_attempt($scormid, $userid) {
global $DB;
// Find the last attempt number for the given user id and scorm id.
$sql = "SELECT MAX(attempt)
FROM {scorm_scoes_track}
WHERE userid = ? AND scormid = ?";
$lastattempt = $DB->get_field_sql($sql, array($userid, $scormid));
if (empty($lastattempt)) {
return '1';
} else {
return $lastattempt;
}
}
/**
* Returns the first attempt used - if no attempts yet, returns 1 for first attempt.
*
* @param int $scormid the id of the scorm.
* @param int $userid the id of the user.
*
* @return int The first attempt number.
*/
function scorm_get_first_attempt($scormid, $userid) {
global $DB;
// Find the first attempt number for the given user id and scorm id.
$sql = "SELECT MIN(attempt)
FROM {scorm_scoes_track}
WHERE userid = ? AND scormid = ?";
$lastattempt = $DB->get_field_sql($sql, array($userid, $scormid));
if (empty($lastattempt)) {
return '1';
} else {
return $lastattempt;
}
}
/**
* Returns the last completed attempt used - if no completed attempts yet, returns 1 for first attempt
*
* @param int $scormid the id of the scorm.
* @param int $userid the id of the user.
*
* @return int The attempt number to use.
*/
function scorm_get_last_completed_attempt($scormid, $userid) {
global $DB;
// Find the last completed attempt number for the given user id and scorm id.
$sql = "SELECT MAX(attempt)
FROM {scorm_scoes_track}
WHERE userid = ? AND scormid = ?
AND (".$DB->sql_compare_text('value')." = ".$DB->sql_compare_text('?')." OR ".
$DB->sql_compare_text('value')." = ".$DB->sql_compare_text('?').")";
$lastattempt = $DB->get_field_sql($sql, array($userid, $scormid, 'completed', 'passed'));
if (empty($lastattempt)) {
return '1';
} else {
return $lastattempt;
}
}
/**
* Returns the full list of attempts a user has made.
*
* @param int $scormid the id of the scorm.
* @param int $userid the id of the user.
*
* @return array array of attemptids
*/
function scorm_get_all_attempts($scormid, $userid) {
global $DB;
$attemptids = array();
$sql = "SELECT DISTINCT attempt FROM {scorm_scoes_track} WHERE userid = ? AND scormid = ? ORDER BY attempt";
$attempts = $DB->get_records_sql($sql, array($userid, $scormid));
foreach ($attempts as $attempt) {
$attemptids[] = $attempt->attempt;
}
return $attemptids;
}
/**
* Displays the entry form and toc if required.
*
* @param stdClass $user user object
* @param stdClass $scorm scorm object
* @param string $action base URL for the organizations select box
* @param stdClass $cm course module object
*/
function scorm_print_launch ($user, $scorm, $action, $cm) {
global $CFG, $DB, $OUTPUT;
if ($scorm->updatefreq == SCORM_UPDATE_EVERYTIME) {
scorm_parse($scorm, false);
}
$organization = optional_param('organization', '', PARAM_INT);
if ($scorm->displaycoursestructure == 1) {
echo $OUTPUT->box_start('generalbox boxaligncenter toc container', 'toc');
echo html_writer::div(get_string('contents', 'scorm'), 'structurehead');
}
if (empty($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), 'sortorder, 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 = $result->incomplete;
// Get latest incomplete sco to launch first if force new attempt isn't set to always.
if (!empty($result->sco->id) && $scorm->forcenewattempt != SCORM_FORCEATTEMPT_ALWAYS) {
$launchsco = $result->sco->id;
} else {
// Use launch defined by SCORM package.
$launchsco = $scorm->launch;
}
// Do we want the TOC to be displayed?
if ($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) {
echo html_writer::start_div('scorm-center');
echo html_writer::start_tag('form', array('id' => 'scormviewform',
'method' => 'post',
'action' => $CFG->wwwroot.'/mod/scorm/player.php',
'class' => 'container'));
if ($scorm->hidebrowse == 0) {
print_string('mode', 'scorm');
echo ': '.html_writer::empty_tag('input', array('type' => 'radio', 'id' => 'b', 'name' => 'mode',
'value' => 'browse', 'class' => 'mr-1')).
html_writer::label(get_string('browse', 'scorm'), 'b');
echo html_writer::empty_tag('input', array('type' => 'radio',
'id' => 'n', 'name' => 'mode',
'value' => 'normal', 'checked' => 'checked',
'class' => 'mx-1')).
html_writer::label(get_string('normal', 'scorm'), 'n');
} else {
echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'mode', 'value' => 'normal'));
}
if (!empty($scorm->forcenewattempt)) {
if ($scorm->forcenewattempt == SCORM_FORCEATTEMPT_ALWAYS ||
($scorm->forcenewattempt == SCORM_FORCEATTEMPT_ONCOMPLETE && $incomplete === false)) {
echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'newattempt', 'value' => 'on'));
}
} else if (!empty($attemptcount) && ($incomplete === false) && (($result->attemptleft > 0)||($scorm->maxattempt == 0))) {
echo html_writer::empty_tag('br');
echo html_writer::checkbox('newattempt', 'on', false, '', array('id' => 'a'));
echo html_writer::label(get_string('newattempt', 'scorm'), 'a');
}
if (!empty($scorm->popup)) {
echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'display', 'value' => 'popup'));
}
echo html_writer::empty_tag('br');
echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'scoid', 'value' => $launchsco));
echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'cm', 'value' => $cm->id));
echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'currentorg', 'value' => $orgidentifier));
echo html_writer::empty_tag('input', array('type' => 'submit', 'value' => get_string('enter', 'scorm'),
'class' => 'btn btn-primary'));
echo html_writer::end_tag('form');
echo html_writer::end_div();
}
}
function scorm_simple_play($scorm, $user, $context, $cmid) {
global $DB;
$result = 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 $result;
}
if ($scorm->updatefreq == SCORM_UPDATE_EVERYTIME) {
scorm_parse($scorm, false);
}
$scoes = $DB->get_records_select('scorm_scoes', 'scorm = ? AND '.
$DB->sql_isnotempty('scorm_scoes', 'launch', false, true), array($scorm->id), 'sortorder, id', 'id');
if ($scoes) {
$orgidentifier = '';
if ($sco = scorm_get_sco($scorm->launch, SCO_ONLY)) {
if (($sco->organization == '') && ($sco->launch == '')) {
$orgidentifier = $sco->identifier;
} else {
$orgidentifier = $sco->organization;
}
}
if ($scorm->skipview >= SCORM_SKIPVIEW_FIRST) {
$sco = current($scoes);
$result = scorm_get_toc($user, $scorm, $cmid, TOCFULLURL, $orgidentifier);
$url = new moodle_url('/mod/scorm/player.php', array('a' => $scorm->id, 'currentorg' => $orgidentifier));
// Set last incomplete sco to launch first if forcenewattempt not set to always.
if (!empty($result->sco->id) && $scorm->forcenewattempt != SCORM_FORCEATTEMPT_ALWAYS) {
$url->param('scoid', $result->sco->id);
} else {
$url->param('scoid', $sco->id);
}
if ($scorm->skipview == SCORM_SKIPVIEW_ALWAYS || !scorm_has_tracks($scorm->id, $user->id)) {
if ($scorm->forcenewattempt == SCORM_FORCEATTEMPT_ALWAYS ||
($result->incomplete === false && $scorm->forcenewattempt == SCORM_FORCEATTEMPT_ONCOMPLETE)) {
$url->param('newattempt', 'on');
}
redirect($url);
}
}
}
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 $elementname Name of array element to get values for
* @param array $children list of sub elements of this array element that also need instantiating
* @return Javascript array elements
*/
function scorm_reconstitute_array_element($sversion, $userdata, $elementname, $children) {
// Reconstitute comments_from_learner and comments_from_lms.
$current = '';
$currentsubelement = '';
$currentsub = '';
$count = 0;
$countsub = 0;
$scormseperator = '_';
$return = '';
if (scorm_version_check($sversion, SCORM_13)) { // Scorm 1.3 elements use a . instead of an _ .
$scormseperator = '.';
}
// Filter out the ones we want.
$elementlist = array();
foreach ($userdata as $element => $value) {
if (substr($element, 0, strlen($elementname)) == $elementname) {
$elementlist[$element] = $value;
}
}
// Sort elements in .n array order.
uksort($elementlist, "scorm_element_cmp");
// Generate JavaScript.
foreach ($elementlist as $element => $value) {
if (scorm_version_check($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 != $matches[1]) {
if ($countsub > 0) {
$return .= ' '.$elementname.$scormseperator.$current.'.'.$currentsubelement.'._count = '.$countsub.";\n";
}
$current = $matches[1];
$count++;
$currentsubelement = '';
$currentsub = '';
$countsub = 0;
$end = strpos($element, $matches[1]) + strlen($matches[1]);
$subelement = substr($element, 0, $end);
$return .= ' '.$subelement." = new Object();\n";
// Now add the children.
foreach ($children as $child) {
$return .= ' '.$subelement.".".$child." = new Object();\n";
$return .= ' '.$subelement.".".$child."._children = ".$child."_children;\n";
}
}
// Now - flesh out the second level elements if there are any.
if (scorm_version_check($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 && $currentsubelement != $matches[1]) {
if ($countsub > 0) {
$return .= ' '.$elementname.$scormseperator.$current.'.'.$currentsubelement.'._count = '.$countsub.";\n";
}
$currentsubelement = $matches[1];
$currentsub = '';
$countsub = 0;
$end = strpos($element, $matches[1]) + strlen($matches[1]);
$subelement = substr($element, 0, $end);
$return .= ' '.$subelement." = new Object();\n";
}
// Now check the subelement subscript.
if (count($matches) > 0 && $currentsub != $matches[2]) {
$currentsub = $matches[2];
$countsub++;
$end = strrpos($element, $matches[2]) + strlen($matches[2]);
$subelement = substr($element, 0, $end);
$return .= ' '.$subelement." = new Object();\n";
}
$return .= ' '.$element.' = '.json_encode($value).";\n";
}
if ($countsub > 0) {
$return .= ' '.$elementname.$scormseperator.$current.'.'.$currentsubelement.'._count = '.$countsub.";\n";
}
if ($count > 0) {
$return .= ' '.$elementname.'._count = '.$count.";\n";
}
return $return;
}
/**
* 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 < $right) {
return -1; // Smaller.
} else if ($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 < $rightterm) {
return -1; // Smaller.
} else if ($leftterm > $rightterm) {
return 1; // Bigger.
} else {
if ($left < $right) {
return -1; // Smaller.
} else if ($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, $cm='') {
global $DB, $PAGE, $OUTPUT;
$attempts = scorm_get_attempt_count($user->id, $scorm, true);
if (empty($attempts)) {
$attemptcount = 0;
} else {
$attemptcount = count($attempts);
}
$result = html_writer::start_tag('p').get_string('noattemptsallowed', 'scorm').': ';
if ($scorm->maxattempt > 0) {
$result .= $scorm->maxattempt . html_writer::empty_tag('br');
} else {
$result .= get_string('unlimited').html_writer::empty_tag('br');
}
$result .= get_string('noattemptsmade', 'scorm').': ' . $attemptcount . html_writer::empty_tag('br');
if ($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 .html_writer::empty_tag('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 .= html_writer::empty_tag('br').get_string('gradereported', 'scorm').
': '.get_string('none').html_writer::empty_tag('br');
} else {
$result .= html_writer::empty_tag('br').get_string('gradereported', 'scorm').
': '.$calculatedgrade.html_writer::empty_tag('br');
}
$result .= html_writer::end_tag('p');
if ($attemptcount >= $scorm->maxattempt and $scorm->maxattempt > 0) {
$result .= html_writer::tag('p', get_string('exceededmaxattempts', 'scorm'), array('class' => 'exceededmaxattempts'));
}
if (!empty($cm)) {
$context = context_module::instance($cm->id);
if (has_capability('mod/scorm:deleteownresponses', $context) &&
$DB->record_exists('scorm_scoes_track', array('userid' => $user->id, 'scormid' => $scorm->id))) {
// Check to see if any data is stored for this user.
$deleteurl = new moodle_url($PAGE->url, array('action' => 'delete', 'sesskey' => sesskey()));
$result .= $OUTPUT->single_button($deleteurl, get_string('deleteallattempts', 'scorm'));
}
}
return $result;
}
/**
* Get SCORM attempt count
*
* @param object $user Current context user
* @param object $scorm a moodle scrom object - mdl_scorm
* @param bool $returnobjects if true returns a object with attempts, if false returns count of attempts.
* @param bool $ignoremissingcompletion - ignores attempts that haven't reported a grade/completion.
* @return int - no. of attempts so far
*/
function scorm_get_attempt_count($userid, $scorm, $returnobjects = false, $ignoremissingcompletion = false) {
global $DB;
// Historically attempts that don't report these elements haven't been included in the average attempts grading method
// we may want to change this in future, but to avoid unexpected grade decreases we're leaving this in. MDL-43222 .
if (scorm_version_check($scorm->version, SCORM_13)) {
$element = 'cmi.score.raw';
} else if ($scorm->grademethod == GRADESCOES) {
$element = 'cmi.core.lesson_status';
} else {
$element = 'cmi.core.score.raw';
}
if ($returnobjects) {
$params = array('userid' => $userid, 'scormid' => $scorm->id);
if ($ignoremissingcompletion) { // Exclude attempts that don't have the completion element requested.
$params['element'] = $element;
}
$attempts = $DB->get_records('scorm_scoes_track', $params, 'attempt', 'DISTINCT attempt AS attemptnumber');
return $attempts;
} else {
$params = array($userid, $scorm->id);
$sql = "SELECT COUNT(DISTINCT attempt)
FROM {scorm_scoes_track}
WHERE userid = ? AND scormid = ?";
if ($ignoremissingcompletion) { // Exclude attempts that don't have the completion element requested.
$sql .= ' AND element = ?';
$params[] = $element;
}
$attemptscount = $DB->count_records_sql($sql, $params);
return $attemptscount;
}
}
/**
* 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 $USER;
$cfgscorm = get_config('scorm');
if (!$cfgscorm->allowapidebug) {
return false;
}
$identifier = $USER->username.':'.$scorm->name;
$test = $cfgscorm->apidebugmask;
// Check the regex is only a short list of safe characters.
if (!preg_match('/^[\w\s\*\.\?\+\:\_\\\]+$/', $test)) {
return false;
}
if (preg_match('/^'.$test.'/', $identifier)) {
return true;
}
return false;
}
/**
* Delete Scorm tracks for selected users
*
* @param array $attemptids list of attempts that need to be deleted
* @param stdClass $scorm instance
*
* @return bool true deleted all responses, false failed deleting an attempt - stopped here
*/
function scorm_delete_responses($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 stdClass $scorm Scorm object
* @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));
$cm = get_coursemodule_from_instance('scorm', $scorm->id);
// Trigger instances list viewed event.
$event = \mod_scorm\event\attempt_deleted::create(array(
'other' => array('attemptid' => $attemptid),
'context' => context_module::instance($cm->id),
'relateduserid' => $userid
));
$event->add_record_snapshot('course_modules', $cm);
$event->add_record_snapshot('scorm', $scorm);
$event->trigger();
include_once('lib.php');
scorm_update_grades($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 $result;
}
function scorm_get_toc_object($user, $scorm, $currentorg='', $scoid='', $mode='normal', $attempt='',
$play=false, $organizationsco=null) {
global $CFG, $DB, $PAGE, $OUTPUT;
// Always pass the mode even if empty as that is what is done elsewhere and the urls have to match.
$modestr = '&mode=';
if ($mode != 'normal') {
$modestr = '&mode='.$mode;
}
$result = array();
$incomplete = false;
if (!empty($organizationsco)) {
$result[0] = $organizationsco;
$result[0]->isvisible = 'true';
$result[0]->statusicon = '';
$result[0]->url = '';
}
if ($scoes = scorm_get_scoes($scorm->id, $currentorg)) {
// Retrieve user tracking data for each learning object.
$usertracks = array();
foreach ($scoes as $sco) {
if (!empty($sco->launch)) {
if ($usertrack = scorm_get_tracks($sco->id, $user->id, $attempt)) {
if ($usertrack->status == '') {
$usertrack->status = 'notattempted';
}
$usertracks[$sco->identifier] = $usertrack;
}
}
}
foreach ($scoes as $sco) {
if (!isset($sco->isvisible)) {
$sco->isvisible = 'true';
}
if (empty($sco->title)) {
$sco->title = $sco->identifier;
}
if (scorm_version_check($scorm->version, SCORM_13)) {
$sco->prereq = true;
} else {
$sco->prereq = empty($sco->prerequisites) || scorm_eval_prerequisites($sco->prerequisites, $usertracks);
}
if ($sco->isvisible === 'true') {
if (!empty($sco->launch)) {
// Set first sco to launch if in browse/review mode.
if (empty($scoid) && ($mode != 'normal')) {
$scoid = $sco->id;
}
if (isset($usertracks[$sco->identifier])) {
$usertrack = $usertracks[$sco->identifier];
// Check we have a valid status string identifier.
if ($statusstringexists = get_string_manager()->string_exists($usertrack->status, 'scorm')) {
$strstatus = get_string($usertrack->status, 'scorm');
} else {
$strstatus = get_string('invalidstatus', 'scorm');
}
if ($sco->scormtype == 'sco') {
// Assume if we didn't get a valid status string, we don't have an icon either.
$statusicon = $OUTPUT->pix_icon($statusstringexists ? $usertrack->status : 'incomplete',
$strstatus, 'scorm');
} else {
$statusicon = $OUTPUT->pix_icon('asset', get_string('assetlaunched', 'scorm'), 'scorm');
}
if (($usertrack->status == 'notattempted') ||
($usertrack->status == 'incomplete') ||
($usertrack->status == 'browsed')) {
$incomplete = true;
if (empty($scoid)) {
$scoid = $sco->id;
}
}
$strsuspended = get_string('suspended', 'scorm');
$exitvar = 'cmi.core.exit';
if (scorm_version_check($scorm->version, SCORM_13)) {
$exitvar = 'cmi.exit';
}
if ($incomplete && isset($usertrack->{$exitvar}) && ($usertrack->{$exitvar} == 'suspend')) {
$statusicon = $OUTPUT->pix_icon('suspend', $strstatus.' - '.$strsuspended, 'scorm');
}
} else {
if (empty($scoid)) {
$scoid = $sco->id;
}
$incomplete = true;
if ($sco->scormtype == 'sco') {
$statusicon = $OUTPUT->pix_icon('notattempted', get_string('notattempted', 'scorm'), 'scorm');
} else {
$statusicon = $OUTPUT->pix_icon('asset', get_string('asset', 'scorm'), 'scorm');
}
}
}
}
if (empty($statusicon)) {
$sco->statusicon = $OUTPUT->pix_icon('notattempted', get_string('notattempted', 'scorm'), 'scorm');
} else {
$sco->statusicon = $statusicon;
}
$sco->url = 'a='.$scorm->id.'&scoid='.$sco->id.'¤torg='.$currentorg.$modestr.'&attempt='.$attempt;
$sco->incomplete = $incomplete;
if (!in_array($sco->id, array_keys($result))) {
$result[$sco->id] = $sco;
}
}
}
// Get the parent scoes!
$result = scorm_get_toc_get_parent_child($result, $currentorg);
// Be safe, prevent warnings from showing up while returning array.
if (!isset($scoid)) {
$scoid = '';
}
return array('scoes' => $result, 'usertracks' => $usertracks, 'scoid' => $scoid);
}
function scorm_get_toc_get_parent_child(&$result, $currentorg) {
$final = array();
$level = 0;
// Organization is always the root, prevparent.
if (!empty($currentorg)) {
$prevparent = $currentorg;
} else {
$prevparent = '/';
}
foreach ($result as $sco) {
if ($sco->parent == '/') {
$final[$level][$sco->identifier] = $sco;
$prevparent = $sco->identifier;
unset($result[$sco->id]);
} else {
if ($sco->parent == $prevparent) {
$final[$level][$sco->identifier] = $sco;
$prevparent = $sco->identifier;
unset($result[$sco->id]);
} else {
if (!empty($final[$level])) {
$found = false;
foreach ($final[$level] as $fin) {
if ($sco->parent == $fin->identifier) {
$found = true;
}
}
if ($found) {
$final[$level][$sco->identifier] = $sco;
unset($result[$sco->id]);
$found = false;
} else {
$level++;
$final[$level][$sco->identifier] = $sco;
unset($result[$sco->id]);
}
}
}
}
}
for ($i = 0; $i <= $level; $i++) {
$prevparent = '';
foreach ($final[$i] as $ident => $sco) {
if (empty($prevparent)) {
$prevparent = $ident;
}
if (!isset($final[$i][$prevparent]->children)) {
$final[$i][$prevparent]->children = array();
}
if ($sco->parent == $prevparent) {
$final[$i][$prevparent]->children[] = $sco;
$prevparent = $ident;
} else {
$parent = false;
foreach ($final[$i] as $identifier => $scoobj) {
if ($identifier == $sco->parent) {
$parent = $identifier;
}
}
if ($parent !== false) {
$final[$i][$parent]->children[] = $sco;
}
}
}
}
$results = array();
for ($i = 0; $i <= $level; $i++) {
$keys = array_keys($final[$i]);
$results[] = $final[$i][$keys[0]];
}
return $results;
}
function scorm_format_toc_for_treeview($user, $scorm, $scoes, $usertracks, $cmid, $toclink=TOCJSLINK, $currentorg='',
$attempt='', $play=false, $organizationsco=null, $children=false) {
global $CFG;
$result = new stdClass();
$result->prerequisites = true;
$result->incomplete = true;
$result->toc = '';
if (!$children) {
$attemptsmade = scorm_get_attempt_count($user->id, $scorm);
$result->attemptleft = $scorm->maxattempt == 0 ? 1 : $scorm->maxattempt - $attemptsmade;
}
if (!$children) {
$result->toc = html_writer::start_tag('ul');
if (!$play && !empty($organizationsco)) {
$result->toc .= html_writer::start_tag('li').$organizationsco->title.html_writer::end_tag('li');
}
}
$prevsco = '';
if (!empty($scoes)) {
foreach ($scoes as $sco) {
if ($sco->isvisible === 'false') {
continue;
}
$result->toc .= html_writer::start_tag('li');
$scoid = $sco->id;
$score = '';
if (isset($usertracks[$sco->identifier])) {
$viewscore = has_capability('mod/scorm:viewscores', context_module::instance($cmid));
if (isset($usertracks[$sco->identifier]->score_raw) && $viewscore) {
if ($usertracks[$sco->identifier]->score_raw != '') {
$score = '('.get_string('score', 'scorm').': '.$usertracks[$sco->identifier]->score_raw.')';
}
}
}
if (!empty($sco->prereq)) {
if ($sco->id == $scoid) {
$result->prerequisites = true;
}
if (!empty($prevsco) && scorm_version_check($scorm->version, SCORM_13) && !empty($prevsco->hidecontinue)) {
if ($sco->scormtype == 'sco') {
$result->toc .= html_writer::span($sco->statusicon.' '.format_string($sco->title));
} else {
$result->toc .= html_writer::span(' '.format_string($sco->title));
}
} else if ($toclink == TOCFULLURL) {
$url = $CFG->wwwroot.'/mod/scorm/player.php?'.$sco->url;
if (!empty($sco->launch)) {
if ($sco->scormtype == 'sco') {
$result->toc .= $sco->statusicon.' ';
$result->toc .= html_writer::link($url, format_string($sco->title)).$score;
} else {
$result->toc .= ' '.html_writer::link($url, format_string($sco->title),
array('data-scoid' => $sco->id)).$score;
}
} else {
if ($sco->scormtype == 'sco') {
$result->toc .= $sco->statusicon.' '.format_string($sco->title).$score;
} else {
$result->toc .= ' '.format_string($sco->title).$score;
}
}
} else {
if (!empty($sco->launch)) {
if ($sco->scormtype == 'sco') {
$result->toc .= html_writer::tag('a', $sco->statusicon.' '.
format_string($sco->title).' '.$score,
array('data-scoid' => $sco->id, 'title' => $sco->url));
} else {
$result->toc .= html_writer::tag('a', ' '.format_string($sco->title).' '.$score,
array('data-scoid' => $sco->id, 'title' => $sco->url));
}
} else {
if ($sco->scormtype == 'sco') {
$result->toc .= html_writer::span($sco->statusicon.' '.format_string($sco->title));
} else {
$result->toc .= html_writer::span(' '.format_string($sco->title));
}
}
}
} else {
if ($play) {
if ($sco->scormtype == 'sco') {
$result->toc .= html_writer::span($sco->statusicon.' '.format_string($sco->title));
} else {
$result->toc .= ' '.format_string($sco->title).html_writer::end_span();
}
} else {
if ($sco->scormtype == 'sco') {
$result->toc .= $sco->statusicon.' '.format_string($sco->title);
} else {
$result->toc .= ' '.format_string($sco->title);
}
}
}
if (!empty($sco->children)) {
$result->toc .= html_writer::start_tag('ul');
$childresult = scorm_format_toc_for_treeview($user, $scorm, $sco->children, $usertracks, $cmid,
$toclink, $currentorg, $attempt, $play, $organizationsco, true);
// Is any of the children incomplete?
$sco->incomplete = $childresult->incomplete;
$result->toc .= $childresult->toc;
$result->toc .= html_writer::end_tag('ul');
$result->toc .= html_writer::end_tag('li');
} else {
$result->toc .= html_writer::end_tag('li');
}
$prevsco = $sco;
}
$result->incomplete = $sco->incomplete;
}
if (!$children) {
$result->toc .= html_writer::end_tag('ul');
}
return $result;
}
function scorm_format_toc_for_droplist($scorm, $scoes, $usertracks, $currentorg='', $organizationsco=null,
$children=false, $level=0, $tocmenus=array()) {
if (!empty($scoes)) {
if (!empty($organizationsco) && !$children) {
$tocmenus[$organizationsco->id] = $organizationsco->title;
}
$parents[$level] = '/';
foreach ($scoes as $sco) {
if ($parents[$level] != $sco->parent) {
if ($newlevel = array_search($sco->parent, $parents)) {
$level = $newlevel;
} else {
$i = $level;
while (($i > 0) && ($parents[$level] != $sco->parent)) {
$i--;
}
if (($i == 0) && ($sco->parent != $currentorg)) {
$level++;
} else {
$level = $i;
}
$parents[$level] = $sco->parent;
}
}
if ($sco->scormtype == 'sco') {
$tocmenus[$sco->id] = scorm_repeater('−', $level) . '>' . format_string($sco->title);
}
if (!empty($sco->children)) {
$tocmenus = scorm_format_toc_for_droplist($scorm, $sco->children, $usertracks, $currentorg,
$organizationsco, true, $level, $tocmenus);
}
}
}
return $tocmenus;
}
function scorm_get_toc($user, $scorm, $cmid, $toclink=TOCJSLINK, $currentorg='', $scoid='', $mode='normal',
$attempt='', $play=false, $tocheader=false) {
global $CFG, $DB, $OUTPUT;
if (empty($attempt)) {
$attempt = scorm_get_last_attempt($scorm->id, $user->id);
}
$result = new stdClass();
$organizationsco = null;
if ($tocheader) {
$result->toc = html_writer::start_div('yui3-g-r', array('id' => 'scorm_layout'));
$result->toc .= html_writer::start_div('yui3-u-1-5 loading', array('id' => 'scorm_toc'));
$result->toc .= html_writer::div('', '', array('id' => 'scorm_toc_title'));
$result->toc .= html_writer::start_div('', array('id' => 'scorm_tree'));
}
if (!empty($currentorg)) {
$organizationsco = $DB->get_record('scorm_scoes', array('scorm' => $scorm->id, 'identifier' => $currentorg));
if (!empty($organizationsco->title)) {
if ($play) {
$result->toctitle = $organizationsco->title;
}
}
}
$scoes = scorm_get_toc_object($user, $scorm, $currentorg, $scoid, $mode, $attempt, $play, $organizationsco);
$treeview = scorm_format_toc_for_treeview($user, $scorm, $scoes['scoes'][0]->children, $scoes['usertracks'], $cmid,
$toclink, $currentorg, $attempt, $play, $organizationsco, false);
if ($tocheader) {
$result->toc .= $treeview->toc;
} else {
$result->toc = $treeview->toc;
}
if (!empty($scoes['scoid'])) {
$scoid = $scoes['scoid'];
}
if (empty($scoid)) {
// If this is a normal package with an org sco and child scos get the first child.
if (!empty($scoes['scoes'][0]->children)) {
$result->sco = $scoes['scoes'][0]->children[0];
} else { // This package only has one sco - it may be a simple external AICC package.
$result->sco = $scoes['scoes'][0];
}
} else {
$result->sco = scorm_get_sco($scoid);
}
if ($scorm->hidetoc == SCORM_TOC_POPUP) {
$tocmenu = scorm_format_toc_for_droplist($scorm, $scoes['scoes'][0]->children, $scoes['usertracks'],
$currentorg, $organizationsco);
$modestr = '';
if ($mode != 'normal') {
$modestr = '&mode='.$mode;
}
$url = new moodle_url('/mod/scorm/player.php?a='.$scorm->id.'¤torg='.$currentorg.$modestr);
$result->tocmenu = $OUTPUT->single_select($url, 'scoid', $tocmenu, $result->sco->id, null, "tocmenu");
}
$result->prerequisites = $treeview->prerequisites;
$result->incomplete = $treeview->incomplete;
$result->attemptleft = $treeview->attemptleft;
if ($tocheader) {
$result->toc .= html_writer::end_div().html_writer::end_div();
$result->toc .= html_writer::start_div('loading', array('id' => 'scorm_toc_toggle'));
$result->toc .= html_writer::tag('button', '', array('id' => 'scorm_toc_toggle_btn')).html_writer::end_div();
$result->toc .= html_writer::start_div('', array('id' => 'scorm_content'));
$result->toc .= html_writer::div('', '', array('id' => 'scorm_navpanel'));
$result->toc .= html_writer::end_div().html_writer::end_div();
}
return $result;
}
function scorm_get_adlnav_json ($scoes, &$adlnav = array(), $parentscoid = null) {
if (is_object($scoes)) {
$sco = $scoes;
if (isset($sco->url)) {
$adlnav[$sco->id]['identifier'] = $sco->identifier;
$adlnav[$sco->id]['launch'] = $sco->launch;
$adlnav[$sco->id]['title'] = $sco->title;
$adlnav[$sco->id]['url'] = $sco->url;
$adlnav[$sco->id]['parent'] = $sco->parent;
if (isset($sco->choice)) {
$adlnav[$sco->id]['choice'] = $sco->choice;
}
if (isset($sco->flow)) {
$adlnav[$sco->id]['flow'] = $sco->flow;
} else if (isset($parentscoid) && isset($adlnav[$parentscoid]['flow'])) {
$adlnav[$sco->id]['flow'] = $adlnav[$parentscoid]['flow'];
}
if (isset($sco->isvisible)) {
$adlnav[$sco->id]['isvisible'] = $sco->isvisible;
}
if (isset($sco->parameters)) {
$adlnav[$sco->id]['parameters'] = $sco->parameters;
}
if (isset($sco->hidecontinue)) {
$adlnav[$sco->id]['hidecontinue'] = $sco->hidecontinue;
}
if (isset($sco->hideprevious)) {
$adlnav[$sco->id]['hideprevious'] = $sco->hideprevious;
}
if (isset($sco->hidesuspendall)) {
$adlnav[$sco->id]['hidesuspendall'] = $sco->hidesuspendall;
}
if (!empty($parentscoid)) {
$adlnav[$sco->id]['parentscoid'] = $parentscoid;
}
if (isset($adlnav['prevscoid'])) {
$adlnav[$sco->id]['prevscoid'] = $adlnav['prevscoid'];
$adlnav[$adlnav['prevscoid']]['nextscoid'] = $sco->id;
if (isset($adlnav['prevparent']) && $adlnav['prevparent'] == $sco->parent) {
$adlnav[$sco->id]['prevsibling'] = $adlnav['prevscoid'];
$adlnav[$adlnav['prevscoid']]['nextsibling'] = $sco->id;
}
}
$adlnav['prevscoid'] = $sco->id;
$adlnav['prevparent'] = $sco->parent;
}
if (isset($sco->children)) {
foreach ($sco->children as $children) {
scorm_get_adlnav_json($children, $adlnav, $sco->id);
}
}
} else {
foreach ($scoes as $sco) {
scorm_get_adlnav_json ($sco, $adlnav);
}
unset($adlnav['prevscoid']);
unset($adlnav['prevparent']);
}
return json_encode($adlnav);
}
/**
* Check for the availability of a resource by URL.
*
* Check is performed using an HTTP HEAD call.
*
* @param $url string A valid URL
* @return bool|string True if no issue is found. The error string message, otherwise
*/
function scorm_check_url($url) {
$curl = new curl;
// Same options as in {@link download_file_content()}, used in {@link scorm_parse_scorm()}.
$curl->setopt(array('CURLOPT_FOLLOWLOCATION' => true, 'CURLOPT_MAXREDIRS' => 5));
$cmsg = $curl->head($url);
$info = $curl->get_info();
if (empty($info['http_code']) || $info['http_code'] != 200) {
return get_string('invalidurlhttpcheck', 'scorm', array('cmsg' => $cmsg));
}
return true;
}
/**
* Check for a parameter in userdata and return it if it's set
* or return the value from $ifempty if its empty
*
* @param stdClass $userdata Contains user's data
* @param string $param parameter that should be checked
* @param string $ifempty value to be replaced with if $param is not set
* @return string value from $userdata->$param if its not empty, or $ifempty
*/
function scorm_isset($userdata, $param, $ifempty = '') {
if (isset($userdata->$param)) {
return $userdata->$param;
} else {
return $ifempty;
}
}
/**
* Check if the current sco is launchable
* If not, find the next launchable sco
*
* @param stdClass $scorm Scorm object
* @param integer $scoid id of scorm_scoes record.
* @return integer scoid of correct sco to launch or empty if one cannot be found, which will trigger first sco.
*/
function scorm_check_launchable_sco($scorm, $scoid) {
global $DB;
if ($sco = scorm_get_sco($scoid, SCO_ONLY)) {
if ($sco->launch == '') {
// This scoid might be a top level org that can't be launched, find the first launchable sco after this sco.
$scoes = $DB->get_records_select('scorm_scoes',
'scorm = ? AND '.$DB->sql_isnotempty('scorm_scoes', 'launch', false, true).
' AND id > ?', array($scorm->id, $sco->id), 'sortorder, id', 'id', 0, 1);
if (!empty($scoes)) {
$sco = reset($scoes); // Get first item from the list.
return $sco->id;
}
} else {
return $sco->id;
}
}
// Returning 0 will cause default behaviour which will find the first launchable sco in the package.
return 0;
}
/**
* Check if a SCORM is available for the current user.
*
* @param stdClass $scorm SCORM record
* @param boolean $checkviewreportcap Check the scorm:viewreport cap
* @param stdClass $context Module context, required if $checkviewreportcap is set to true
* @param int $userid User id override
* @return array status (available or not and possible warnings)
* @since Moodle 3.0
*/
function scorm_get_availability_status($scorm, $checkviewreportcap = false, $context = null, $userid = null) {
$open = true;
$closed = false;
$warnings = array();
$timenow = time();
if (!empty($scorm->timeopen) and $scorm->timeopen > $timenow) {
$open = false;
}
if (!empty($scorm->timeclose) and $timenow > $scorm->timeclose) {
$closed = true;
}
if (!$open or $closed) {
if ($checkviewreportcap and !empty($context) and has_capability('mod/scorm:viewreport', $context, $userid)) {
return array(true, $warnings);
}
if (!$open) {
$warnings['notopenyet'] = userdate($scorm->timeopen);
}
if ($closed) {
$warnings['expired'] = userdate($scorm->timeclose);
}
return array(false, $warnings);
}
// Scorm is available.
return array(true, $warnings);
}
/**
* Requires a SCORM package to be available for the current user.
*
* @param stdClass $scorm SCORM record
* @param boolean $checkviewreportcap Check the scorm:viewreport cap
* @param stdClass $context Module context, required if $checkviewreportcap is set to true
* @throws moodle_exception
* @since Moodle 3.0
*/
function scorm_require_available($scorm, $checkviewreportcap = false, $context = null) {
list($available, $warnings) = scorm_get_availability_status($scorm, $checkviewreportcap, $context);
if (!$available) {
$reason = current(array_keys($warnings));
throw new moodle_exception($reason, 'scorm', '', $warnings[$reason]);
}
}
/**
* Return a SCO object and the SCO launch URL
*
* @param stdClass $scorm SCORM object
* @param int $scoid The SCO id in database
* @param stdClass $context context object
* @return array the SCO object and URL
* @since Moodle 3.1
*/
function scorm_get_sco_and_launch_url($scorm, $scoid, $context) {
global $CFG, $DB;
if (!empty($scoid)) {
// Direct SCO request.
if ($sco = scorm_get_sco($scoid)) {
if ($sco->launch == '') {
// Search for the next launchable sco.
if ($scoes = $DB->get_records_select(
'scorm_scoes',
'scorm = ? AND '.$DB->sql_isnotempty('scorm_scoes', 'launch', false, true).' AND id > ?',
array($scorm->id, $sco->id),
'sortorder, id')) {
$sco = current($scoes);
}
}
}
}
// If no sco was found get the first of SCORM package.
if (!isset($sco)) {
$scoes = $DB->get_records_select(
'scorm_scoes',
'scorm = ? AND '.$DB->sql_isnotempty('scorm_scoes', 'launch', false, true),
array($scorm->id),
'sortorder, id'
);
$sco = current($scoes);
}
$connector = '';
$version = substr($scorm->version, 0, 4);
if ((isset($sco->parameters) && (!empty($sco->parameters))) || ($version == 'AICC')) {
if (stripos($sco->launch, '?') !== false) {
$connector = '&';
} else {
$connector = '?';
}
if ((isset($sco->parameters) && (!empty($sco->parameters))) && ($sco->parameters[0] == '?')) {
$sco->parameters = substr($sco->parameters, 1);
}
}
if ($version == 'AICC') {
require_once("$CFG->dirroot/mod/scorm/datamodels/aicclib.php");
$aiccsid = scorm_aicc_get_hacp_session($scorm->id);
if (empty($aiccsid)) {
$aiccsid = sesskey();
}
$scoparams = '';
if (isset($sco->parameters) && (!empty($sco->parameters))) {
$scoparams = '&'. $sco->parameters;
}
$launcher = $sco->launch.$connector.'aicc_sid='.$aiccsid.'&aicc_url='.$CFG->wwwroot.'/mod/scorm/aicc.php'.$scoparams;
} else {
if (isset($sco->parameters) && (!empty($sco->parameters))) {
$launcher = $sco->launch.$connector.$sco->parameters;
} else {
$launcher = $sco->launch;
}
}
if (scorm_external_link($sco->launch)) {
// TODO: does this happen?
$scolaunchurl = $launcher;
} else if ($scorm->scormtype === SCORM_TYPE_EXTERNAL) {
// Remote learning activity.
$scolaunchurl = dirname($scorm->reference).'/'.$launcher;
} else if ($scorm->scormtype === SCORM_TYPE_LOCAL && strtolower($scorm->reference) == 'imsmanifest.xml') {
// This SCORM content sits in a repository that allows relative links.
$scolaunchurl = "$CFG->wwwroot/pluginfile.php/$context->id/mod_scorm/imsmanifest/$scorm->revision/$launcher";
} else if ($scorm->scormtype === SCORM_TYPE_LOCAL or $scorm->scormtype === SCORM_TYPE_LOCALSYNC) {
// Note: do not convert this to use moodle_url().
// SCORM does not work without slasharguments and moodle_url() encodes querystring vars.
$scolaunchurl = "$CFG->wwwroot/pluginfile.php/$context->id/mod_scorm/content/$scorm->revision/$launcher";
}
return array($sco, $scolaunchurl);
}
/**
* Trigger the scorm_launched event.
*
* @param stdClass $scorm scorm object
* @param stdClass $sco sco object
* @param stdClass $cm course module object
* @param stdClass $context context object
* @param string $scourl SCO URL
* @since Moodle 3.1
*/
function scorm_launch_sco($scorm, $sco, $cm, $context, $scourl) {
$event = \mod_scorm\event\sco_launched::create(array(
'objectid' => $sco->id,
'context' => $context,
'other' => array('instanceid' => $scorm->id, 'loadedcontent' => $scourl)
));
$event->add_record_snapshot('course_modules', $cm);
$event->add_record_snapshot('scorm', $scorm);
$event->add_record_snapshot('scorm_scoes', $sco);
$event->trigger();
}
/**
* This is really a little language parser for AICC_SCRIPT
* evaluates the expression and returns a boolean answer
* see 2.3.2.5.1. Sequencing/Navigation Today - from the SCORM 1.2 spec (CAM).
* Also used by AICC packages.
*
* @param string $prerequisites the aicc_script prerequisites expression
* @param array $usertracks the tracked user data of each SCO visited
* @return boolean
*/
function scorm_eval_prerequisites($prerequisites, $usertracks) {
// This is really a little language parser - AICC_SCRIPT is the reference
// see 2.3.2.5.1. Sequencing/Navigation Today - from the SCORM 1.2 spec.
$element = '';
$stack = array();
$statuses = array(
'passed' => 'passed',
'completed' => 'completed',
'failed' => 'failed',
'incomplete' => 'incomplete',
'browsed' => 'browsed',
'not attempted' => 'notattempted',
'p' => 'passed',
'c' => 'completed',
'f' => 'failed',
'i' => 'incomplete',
'b' => 'browsed',
'n' => 'notattempted'
);
$i = 0;
// Expand the amp entities.
$prerequisites = preg_replace('/&/', '&', $prerequisites);
// Find all my parsable tokens.
$prerequisites = preg_replace('/(&|\||\(|\)|\~)/', '\t$1\t', $prerequisites);
// Expand operators.
$prerequisites = preg_replace('/&/', '&&', $prerequisites);
$prerequisites = preg_replace('/\|/', '||', $prerequisites);
// Now - grab all the tokens.
$elements = explode('\t', trim($prerequisites));
// Process each token to build an expression to be evaluated.
$stack = array();
foreach ($elements as $element) {
$element = trim($element);
if (empty($element)) {
continue;
}
if (!preg_match('/^(&&|\|\||\(|\))$/', $element)) {
// Create each individual expression.
// Search for ~ = <> X*{} .
// Sets like 3*{S34, S36, S37, S39}.
if (preg_match('/^(\d+)\*\{(.+)\}$/', $element, $matches)) {
$repeat = $matches[1];
$set = explode(',', $matches[2]);
$count = 0;
foreach ($set as $setelement) {
if (isset($usertracks[$setelement]) &&
($usertracks[$setelement]->status == 'completed' || $usertracks[$setelement]->status == 'passed')) {
$count++;
}
}
if ($count >= $repeat) {
$element = 'true';
} else {
$element = 'false';
}
} else if ($element == '~') {
// Not maps ~.
$element = '!';
} else if (preg_match('/^(.+)(\=|\<\>)(.+)$/', $element, $matches)) {
// Other symbols = | <> .
$element = trim($matches[1]);
if (isset($usertracks[$element])) {
$value = trim(preg_replace('/(\'|\")/', '', $matches[3]));
if (isset($statuses[$value])) {
$value = $statuses[$value];
}
$elementprerequisitematch = (strcmp($usertracks[$element]->status, $value) == 0);
if ($matches[2] == '<>') {
$element = $elementprerequisitematch ? 'false' : 'true';
} else {
$element = $elementprerequisitematch ? 'true' : 'false';
}
} else {
$element = 'false';
}
} else {
// Everything else must be an element defined like S45 ...
if (isset($usertracks[$element]) &&
($usertracks[$element]->status == 'completed' || $usertracks[$element]->status == 'passed')) {
$element = 'true';
} else {
$element = 'false';
}
}
}
$stack[] = ' '.$element.' ';
}
return eval('return '.implode($stack).';');
}
/**
* Update the calendar entries for this scorm activity.
*
* @param stdClass $scorm the row from the database table scorm.
* @param int $cmid The coursemodule id
* @return bool
*/
function scorm_update_calendar(stdClass $scorm, $cmid) {
global $DB, $CFG;
require_once($CFG->dirroot.'/calendar/lib.php');
// Scorm start calendar events.
$event = new stdClass();
$event->eventtype = SCORM_EVENT_TYPE_OPEN;
// The SCORM_EVENT_TYPE_OPEN event should only be an action event if no close time is specified.
$event->type = empty($scorm->timeclose) ? CALENDAR_EVENT_TYPE_ACTION : CALENDAR_EVENT_TYPE_STANDARD;
if ($event->id = $DB->get_field('event', 'id',
array('modulename' => 'scorm', 'instance' => $scorm->id, 'eventtype' => $event->eventtype))) {
if ((!empty($scorm->timeopen)) && ($scorm->timeopen > 0)) {
// Calendar event exists so update it.
$event->name = get_string('calendarstart', 'scorm', $scorm->name);
$event->description = format_module_intro('scorm', $scorm, $cmid, false);
$event->format = FORMAT_HTML;
$event->timestart = $scorm->timeopen;
$event->timesort = $scorm->timeopen;
$event->visible = instance_is_visible('scorm', $scorm);
$event->timeduration = 0;
$calendarevent = calendar_event::load($event->id);
$calendarevent->update($event, false);
} else {
// Calendar event is on longer needed.
$calendarevent = calendar_event::load($event->id);
$calendarevent->delete();
}
} else {
// Event doesn't exist so create one.
if ((!empty($scorm->timeopen)) && ($scorm->timeopen > 0)) {
$event->name = get_string('calendarstart', 'scorm', $scorm->name);
$event->description = format_module_intro('scorm', $scorm, $cmid, false);
$event->format = FORMAT_HTML;
$event->courseid = $scorm->course;
$event->groupid = 0;
$event->userid = 0;
$event->modulename = 'scorm';
$event->instance = $scorm->id;
$event->timestart = $scorm->timeopen;
$event->timesort = $scorm->timeopen;
$event->visible = instance_is_visible('scorm', $scorm);
$event->timeduration = 0;
calendar_event::create($event, false);
}
}
// Scorm end calendar events.
$event = new stdClass();
$event->type = CALENDAR_EVENT_TYPE_ACTION;
$event->eventtype = SCORM_EVENT_TYPE_CLOSE;
if ($event->id = $DB->get_field('event', 'id',
array('modulename' => 'scorm', 'instance' => $scorm->id, 'eventtype' => $event->eventtype))) {
if ((!empty($scorm->timeclose)) && ($scorm->timeclose > 0)) {
// Calendar event exists so update it.
$event->name = get_string('calendarend', 'scorm', $scorm->name);
$event->description = format_module_intro('scorm', $scorm, $cmid, false);
$event->format = FORMAT_HTML;
$event->timestart = $scorm->timeclose;
$event->timesort = $scorm->timeclose;
$event->visible = instance_is_visible('scorm', $scorm);
$event->timeduration = 0;
$calendarevent = calendar_event::load($event->id);
$calendarevent->update($event, false);
} else {
// Calendar event is on longer needed.
$calendarevent = calendar_event::load($event->id);
$calendarevent->delete();
}
} else {
// Event doesn't exist so create one.
if ((!empty($scorm->timeclose)) && ($scorm->timeclose > 0)) {
$event->name = get_string('calendarend', 'scorm', $scorm->name);
$event->description = format_module_intro('scorm', $scorm, $cmid, false);
$event->format = FORMAT_HTML;
$event->courseid = $scorm->course;
$event->groupid = 0;
$event->userid = 0;
$event->modulename = 'scorm';
$event->instance = $scorm->id;
$event->timestart = $scorm->timeclose;
$event->timesort = $scorm->timeclose;
$event->visible = instance_is_visible('scorm', $scorm);
$event->timeduration = 0;
calendar_event::create($event, false);
}
}
return true;
}