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See Release Notes

  • Bug fixes for general core bugs in 3.10.x will end 8 November 2021 (12 months).
  • Bug fixes for security issues in 3.10.x will end 9 May 2022 (18 months).
  • PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
<?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 $OUTPUT->box_start('generalbox boxaligncenter toc', 'toc');
echo html_writer::div(get_string('contents', 'scorm'), 'structurehead'); } if (empty($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'));
> 'action' => $CFG->wwwroot.'/mod/scorm/player.php'));
if ($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'); <
> echo html_writer::tag('button', get_string('browse', 'scorm'), > ['class' => 'btn btn-secondary mr-1', 'name' => 'mode', > 'type' => 'submit', 'id' => 'b', 'value' => 'browse']) > . html_writer::end_tag('button');
} else { echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'mode', 'value' => 'normal')); }
> echo html_writer::tag('button', get_string('enter', 'scorm'), if (!empty($scorm->forcenewattempt)) { > ['class' => 'btn btn-primary mx-1', 'name' => 'mode', if ($scorm->forcenewattempt == SCORM_FORCEATTEMPT_ALWAYS || > 'type' => 'submit', 'id' => 'n', 'value' => 'normal']) ($scorm->forcenewattempt == SCORM_FORCEATTEMPT_ONCOMPLETE && $incomplete === false)) { > . html_writer::end_tag('button');
echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'newattempt', 'value' => 'on')); } } else if (!empty($attemptcount) && ($incomplete === false) && (($result->attemptleft > 0)||($scorm->maxattempt == 0))) {
< echo html_writer::empty_tag('br');
> echo html_writer::start_div('pt-1');
echo html_writer::checkbox('newattempt', 'on', false, '', array('id' => 'a'));
< echo html_writer::label(get_string('newattempt', 'scorm'), 'a');
> echo html_writer::label(get_string('newattempt', 'scorm'), 'a', true, ['class' => 'pl-1']); > echo html_writer::end_div();
} if (!empty($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='.$sco->id.'&currentorg='.$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 != '') { $score = '('.get_string('score', 'scorm').':&nbsp;'.$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.'&nbsp;'.format_string($sco->title)); } else { $result->toc .= html_writer::span('&nbsp;'.format_string($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.'&nbsp;'; $result->toc .= html_writer::link($url, format_string($sco->title)).$score; } else { $result->toc .= '&nbsp;'.html_writer::link($url, format_string($sco->title), array('data-scoid' => $sco->id)).$score; } } else { if ($sco->scormtype == 'sco') { $result->toc .= $sco->statusicon.'&nbsp;'.format_string($sco->title).$score; } else { $result->toc .= '&nbsp;'.format_string($sco->title).$score; } } } else { if (!empty($sco->launch)) { if ($sco->scormtype == 'sco') { $result->toc .= html_writer::tag('a', $sco->statusicon.'&nbsp;'. format_string($sco->title).'&nbsp;'.$score, array('data-scoid' => $sco->id, 'title' => $sco->url)); } else { $result->toc .= html_writer::tag('a', '&nbsp;'.format_string($sco->title).'&nbsp;'.$score, array('data-scoid' => $sco->id, 'title' => $sco->url)); } } else { if ($sco->scormtype == 'sco') { $result->toc .= html_writer::span($sco->statusicon.'&nbsp;'.format_string($sco->title)); } else { $result->toc .= html_writer::span('&nbsp;'.format_string($sco->title)); } } } } else { if ($play) { if ($sco->scormtype == 'sco') { $result->toc .= html_writer::span($sco->statusicon.'&nbsp;'.format_string($sco->title)); } else { $result->toc .= '&nbsp;'.format_string($sco->title).html_writer::end_span(); } } else { if ($sco->scormtype == 'sco') { $result->toc .= $sco->statusicon.'&nbsp;'.format_string($sco->title); } else { $result->toc .= '&nbsp;'.format_string($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('&minus;', $level) . '&gt;' . format_string($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.'&currentorg='.$currentorg.$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('/&amp;/', '&', $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; }