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<?php
2
// This file is part of Moodle - http://moodle.org/
3
//
4
// Moodle is free software: you can redistribute it and/or modify
5
// it under the terms of the GNU General Public License as published by
6
// the Free Software Foundation, either version 3 of the License, or
7
// (at your option) any later version.
8
//
9
// Moodle is distributed in the hope that it will be useful,
10
// but WITHOUT ANY WARRANTY; without even the implied warranty of
11
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12
// GNU General Public License for more details.
13
//
14
// You should have received a copy of the GNU General Public License
15
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
16
 
17
/**
18
 * Library of internal classes and functions for module SCORM
19
 *
20
 * @package    mod_scorm
21
 * @copyright  1999 onwards Roberto Pinna
22
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
23
 */
24
 
25
require_once("$CFG->dirroot/mod/scorm/lib.php");
26
require_once("$CFG->libdir/filelib.php");
27
 
28
// Constants and settings for module scorm.
29
define('SCORM_UPDATE_NEVER', '0');
30
define('SCORM_UPDATE_EVERYDAY', '2');
31
define('SCORM_UPDATE_EVERYTIME', '3');
32
 
33
define('SCORM_SKIPVIEW_NEVER', '0');
34
define('SCORM_SKIPVIEW_FIRST', '1');
35
define('SCORM_SKIPVIEW_ALWAYS', '2');
36
 
37
define('SCO_ALL', 0);
38
define('SCO_DATA', 1);
39
define('SCO_ONLY', 2);
40
 
41
define('GRADESCOES', '0');
42
define('GRADEHIGHEST', '1');
43
define('GRADEAVERAGE', '2');
44
define('GRADESUM', '3');
45
 
46
define('HIGHESTATTEMPT', '0');
47
define('AVERAGEATTEMPT', '1');
48
define('FIRSTATTEMPT', '2');
49
define('LASTATTEMPT', '3');
50
 
51
define('TOCJSLINK', 1);
52
define('TOCFULLURL', 2);
53
 
54
define('SCORM_FORCEATTEMPT_NO', 0);
55
define('SCORM_FORCEATTEMPT_ONCOMPLETE', 1);
56
define('SCORM_FORCEATTEMPT_ALWAYS', 2);
57
 
58
// Local Library of functions for module scorm.
59
 
60
/**
61
 * @package   mod_scorm
62
 * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
63
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
64
 */
65
class scorm_package_file_info extends file_info_stored {
66
    public function get_parent() {
67
        if ($this->lf->get_filepath() === '/' and $this->lf->get_filename() === '.') {
68
            return $this->browser->get_file_info($this->context);
69
        }
70
        return parent::get_parent();
71
    }
72
    public function get_visible_name() {
73
        if ($this->lf->get_filepath() === '/' and $this->lf->get_filename() === '.') {
74
            return $this->topvisiblename;
75
        }
76
        return parent::get_visible_name();
77
    }
78
}
79
 
80
/**
81
 * Returns an array of the popup options for SCORM and each options default value
82
 *
83
 * @return array an array of popup options as the key and their defaults as the value
84
 */
85
function scorm_get_popup_options_array() {
86
    $cfgscorm = get_config('scorm');
87
 
88
    return array('scrollbars' => isset($cfgscorm->scrollbars) ? $cfgscorm->scrollbars : 0,
89
                 'directories' => isset($cfgscorm->directories) ? $cfgscorm->directories : 0,
90
                 'location' => isset($cfgscorm->location) ? $cfgscorm->location : 0,
91
                 'menubar' => isset($cfgscorm->menubar) ? $cfgscorm->menubar : 0,
92
                 'toolbar' => isset($cfgscorm->toolbar) ? $cfgscorm->toolbar : 0,
93
                 'status' => isset($cfgscorm->status) ? $cfgscorm->status : 0);
94
}
95
 
96
/**
97
 * Returns an array of the array of what grade options
98
 *
99
 * @return array an array of what grade options
100
 */
101
function scorm_get_grade_method_array() {
102
    return array (GRADESCOES => get_string('gradescoes', 'scorm'),
103
                  GRADEHIGHEST => get_string('gradehighest', 'scorm'),
104
                  GRADEAVERAGE => get_string('gradeaverage', 'scorm'),
105
                  GRADESUM => get_string('gradesum', 'scorm'));
106
}
107
 
108
/**
109
 * Returns an array of the array of what grade options
110
 *
111
 * @return array an array of what grade options
112
 */
113
function scorm_get_what_grade_array() {
114
    return array (HIGHESTATTEMPT => get_string('highestattempt', 'scorm'),
115
                  AVERAGEATTEMPT => get_string('averageattempt', 'scorm'),
116
                  FIRSTATTEMPT => get_string('firstattempt', 'scorm'),
117
                  LASTATTEMPT => get_string('lastattempt', 'scorm'));
118
}
119
 
120
/**
121
 * Returns an array of the array of skip view options
122
 *
123
 * @return array an array of skip view options
124
 */
125
function scorm_get_skip_view_array() {
126
    return array(SCORM_SKIPVIEW_NEVER => get_string('never'),
127
                 SCORM_SKIPVIEW_FIRST => get_string('firstaccess', 'scorm'),
128
                 SCORM_SKIPVIEW_ALWAYS => get_string('always'));
129
}
130
 
131
/**
132
 * Returns an array of the array of hide table of contents options
133
 *
134
 * @return array an array of hide table of contents options
135
 */
136
function scorm_get_hidetoc_array() {
137
     return array(SCORM_TOC_SIDE => get_string('sided', 'scorm'),
138
                  SCORM_TOC_HIDDEN => get_string('hidden', 'scorm'),
139
                  SCORM_TOC_POPUP => get_string('popupmenu', 'scorm'),
140
                  SCORM_TOC_DISABLED => get_string('disabled', 'scorm'));
141
}
142
 
143
/**
144
 * Returns an array of the array of update frequency options
145
 *
146
 * @return array an array of update frequency options
147
 */
148
function scorm_get_updatefreq_array() {
149
    return array(SCORM_UPDATE_NEVER => get_string('never'),
150
                 SCORM_UPDATE_EVERYDAY => get_string('everyday', 'scorm'),
151
                 SCORM_UPDATE_EVERYTIME => get_string('everytime', 'scorm'));
152
}
153
 
154
/**
155
 * Returns an array of the array of popup display options
156
 *
157
 * @return array an array of popup display options
158
 */
159
function scorm_get_popup_display_array() {
160
    return array(0 => get_string('currentwindow', 'scorm'),
161
                 1 => get_string('popup', 'scorm'));
162
}
163
 
164
/**
165
 * Returns an array of the array of navigation buttons display options
166
 *
167
 * @return array an array of navigation buttons display options
168
 */
169
function scorm_get_navigation_display_array() {
170
    return array(SCORM_NAV_DISABLED => get_string('no'),
171
                 SCORM_NAV_UNDER_CONTENT => get_string('undercontent', 'scorm'),
172
                 SCORM_NAV_FLOATING => get_string('floating', 'scorm'));
173
}
174
 
175
/**
176
 * Returns an array of the array of attempt options
177
 *
178
 * @return array an array of attempt options
179
 */
180
function scorm_get_attempts_array() {
181
    $attempts = array(0 => get_string('nolimit', 'scorm'),
182
                      1 => get_string('attempt1', 'scorm'));
183
 
184
    for ($i = 2; $i <= 6; $i++) {
185
        $attempts[$i] = get_string('attemptsx', 'scorm', $i);
186
    }
187
 
188
    return $attempts;
189
}
190
 
191
/**
192
 * Returns an array of the attempt status options
193
 *
194
 * @return array an array of attempt status options
195
 */
196
function scorm_get_attemptstatus_array() {
197
    return array(SCORM_DISPLAY_ATTEMPTSTATUS_NO => get_string('no'),
198
                 SCORM_DISPLAY_ATTEMPTSTATUS_ALL => get_string('attemptstatusall', 'scorm'),
199
                 SCORM_DISPLAY_ATTEMPTSTATUS_MY => get_string('attemptstatusmy', 'scorm'),
200
                 SCORM_DISPLAY_ATTEMPTSTATUS_ENTRY => get_string('attemptstatusentry', 'scorm'));
201
}
202
 
203
/**
204
 * Returns an array of the force attempt options
205
 *
206
 * @return array an array of attempt options
207
 */
208
function scorm_get_forceattempt_array() {
209
    return array(SCORM_FORCEATTEMPT_NO => get_string('no'),
210
                 SCORM_FORCEATTEMPT_ONCOMPLETE => get_string('forceattemptoncomplete', 'scorm'),
211
                 SCORM_FORCEATTEMPT_ALWAYS => get_string('forceattemptalways', 'scorm'));
212
}
213
 
214
/**
215
 * Extracts scrom package, sets up all variables.
216
 * Called whenever scorm changes
217
 * @param object $scorm instance - fields are updated and changes saved into database
218
 * @param bool $full force full update if true
219
 * @return void
220
 */
221
function scorm_parse($scorm, $full) {
222
    global $CFG, $DB;
223
    $cfgscorm = get_config('scorm');
224
 
225
    if (!isset($scorm->cmid)) {
226
        $cm = get_coursemodule_from_instance('scorm', $scorm->id);
227
        $scorm->cmid = $cm->id;
228
    }
229
    $context = context_module::instance($scorm->cmid);
230
    $newhash = $scorm->sha1hash;
231
 
232
    if ($scorm->scormtype === SCORM_TYPE_LOCAL or $scorm->scormtype === SCORM_TYPE_LOCALSYNC) {
233
 
234
        $fs = get_file_storage();
235
        $packagefile = false;
236
        $packagefileimsmanifest = false;
237
 
238
        if ($scorm->scormtype === SCORM_TYPE_LOCAL) {
239
            if ($packagefile = $fs->get_file($context->id, 'mod_scorm', 'package', 0, '/', $scorm->reference)) {
240
                if ($packagefile->is_external_file()) { // Get zip file so we can check it is correct.
241
                    $packagefile->import_external_file_contents();
242
                }
243
                $newhash = $packagefile->get_contenthash();
244
                if (strtolower($packagefile->get_filename()) == 'imsmanifest.xml') {
245
                    $packagefileimsmanifest = true;
246
                }
247
            } else {
248
                $newhash = null;
249
            }
250
        } else {
251
            if (!$cfgscorm->allowtypelocalsync) {
252
                // Sorry - localsync disabled.
253
                return;
254
            }
255
            if ($scorm->reference !== '') {
256
                $fs->delete_area_files($context->id, 'mod_scorm', 'package');
257
                $filerecord = array('contextid' => $context->id, 'component' => 'mod_scorm', 'filearea' => 'package',
258
                                    'itemid' => 0, 'filepath' => '/');
259
                if ($packagefile = $fs->create_file_from_url($filerecord, $scorm->reference, array('calctimeout' => true), true)) {
260
                    $newhash = $packagefile->get_contenthash();
261
                } else {
262
                    $newhash = null;
263
                }
264
            }
265
        }
266
 
267
        if ($packagefile) {
268
            if (!$full and $packagefile and $scorm->sha1hash === $newhash) {
269
                if (strpos($scorm->version, 'SCORM') !== false) {
270
                    if ($packagefileimsmanifest || $fs->get_file($context->id, 'mod_scorm', 'content', 0, '/', 'imsmanifest.xml')) {
271
                        // No need to update.
272
                        return;
273
                    }
274
                } else if (strpos($scorm->version, 'AICC') !== false) {
275
                    // TODO: add more sanity checks - something really exists in scorm_content area.
276
                    return;
277
                }
278
            }
279
            if (!$packagefileimsmanifest) {
280
                // Now extract files.
281
                $fs->delete_area_files($context->id, 'mod_scorm', 'content');
282
 
283
                $packer = get_file_packer('application/zip');
284
                $packagefile->extract_to_storage($packer, $context->id, 'mod_scorm', 'content', 0, '/');
285
            }
286
 
287
        } else if (!$full) {
288
            return;
289
        }
290
        if ($packagefileimsmanifest) {
291
            require_once("$CFG->dirroot/mod/scorm/datamodels/scormlib.php");
292
            // Direct link to imsmanifest.xml file.
293
            if (!scorm_parse_scorm($scorm, $packagefile)) {
294
                $scorm->version = 'ERROR';
295
            }
296
 
297
        } else if ($manifest = $fs->get_file($context->id, 'mod_scorm', 'content', 0, '/', 'imsmanifest.xml')) {
298
            require_once("$CFG->dirroot/mod/scorm/datamodels/scormlib.php");
299
            // SCORM.
300
            if (!scorm_parse_scorm($scorm, $manifest)) {
301
                $scorm->version = 'ERROR';
302
            }
303
        } else {
304
            require_once("$CFG->dirroot/mod/scorm/datamodels/aicclib.php");
305
            // AICC.
306
            $result = scorm_parse_aicc($scorm);
307
            if (!$result) {
308
                $scorm->version = 'ERROR';
309
            } else {
310
                $scorm->version = 'AICC';
311
            }
312
        }
313
 
314
    } else if ($scorm->scormtype === SCORM_TYPE_EXTERNAL and $cfgscorm->allowtypeexternal) {
315
        require_once("$CFG->dirroot/mod/scorm/datamodels/scormlib.php");
316
        // SCORM only, AICC can not be external.
317
        if (!scorm_parse_scorm($scorm, $scorm->reference)) {
318
            $scorm->version = 'ERROR';
319
        }
320
        $newhash = sha1($scorm->reference);
321
 
322
    } else if ($scorm->scormtype === SCORM_TYPE_AICCURL  and $cfgscorm->allowtypeexternalaicc) {
323
        require_once("$CFG->dirroot/mod/scorm/datamodels/aicclib.php");
324
        // AICC.
325
        $result = scorm_parse_aicc($scorm);
326
        if (!$result) {
327
            $scorm->version = 'ERROR';
328
        } else {
329
            $scorm->version = 'AICC';
330
        }
331
 
332
    } else {
333
        // Sorry, disabled type.
334
        return;
335
    }
336
 
337
    $scorm->revision++;
338
    $scorm->sha1hash = $newhash;
339
    $DB->update_record('scorm', $scorm);
340
}
341
 
342
 
343
function scorm_array_search($item, $needle, $haystacks, $strict=false) {
344
    if (!empty($haystacks)) {
345
        foreach ($haystacks as $key => $element) {
346
            if ($strict) {
347
                if ($element->{$item} === $needle) {
348
                    return $key;
349
                }
350
            } else {
351
                if ($element->{$item} == $needle) {
352
                    return $key;
353
                }
354
            }
355
        }
356
    }
357
    return false;
358
}
359
 
360
function scorm_repeater($what, $times) {
361
    if ($times <= 0) {
362
        return null;
363
    }
364
    $return = '';
365
    for ($i = 0; $i < $times; $i++) {
366
        $return .= $what;
367
    }
368
    return $return;
369
}
370
 
371
function scorm_external_link($link) {
372
    // Check if a link is external.
373
    $result = false;
374
    $link = strtolower($link);
375
    if (substr($link, 0, 7) == 'http://') {
376
        $result = true;
377
    } else if (substr($link, 0, 8) == 'https://') {
378
        $result = true;
379
    } else if (substr($link, 0, 4) == 'www.') {
380
        $result = true;
381
    }
382
    return $result;
383
}
384
 
385
/**
386
 * Returns an object containing all datas relative to the given sco ID
387
 *
388
 * @param integer $id The sco ID
389
 * @return mixed (false if sco id does not exists)
390
 */
391
function scorm_get_sco($id, $what=SCO_ALL) {
392
    global $DB;
393
 
394
    if ($sco = $DB->get_record('scorm_scoes', array('id' => $id))) {
395
        $sco = ($what == SCO_DATA) ? new stdClass() : $sco;
396
        if (($what != SCO_ONLY) && ($scodatas = $DB->get_records('scorm_scoes_data', array('scoid' => $id)))) {
397
            foreach ($scodatas as $scodata) {
398
                $sco->{$scodata->name} = $scodata->value;
399
            }
400
        } else if (($what != SCO_ONLY) && (!($scodatas = $DB->get_records('scorm_scoes_data', array('scoid' => $id))))) {
401
            $sco->parameters = '';
402
        }
403
        return $sco;
404
    } else {
405
        return false;
406
    }
407
}
408
 
409
/**
410
 * Returns an object (array) containing all the scoes data related to the given sco ID
411
 *
412
 * @param integer $id The sco ID
413
 * @param integer $organisation an organisation ID - defaults to false if not required
414
 * @return mixed (false if there are no scoes or an array)
415
 */
416
function scorm_get_scoes($id, $organisation=false) {
417
    global $DB;
418
 
419
    $queryarray = array('scorm' => $id);
420
    if (!empty($organisation)) {
421
        $queryarray['organization'] = $organisation;
422
    }
423
    if ($scoes = $DB->get_records('scorm_scoes', $queryarray, 'sortorder, id')) {
424
        // Drop keys so that it is a simple array as expected.
425
        $scoes = array_values($scoes);
426
        foreach ($scoes as $sco) {
427
            if ($scodatas = $DB->get_records('scorm_scoes_data', array('scoid' => $sco->id))) {
428
                foreach ($scodatas as $scodata) {
429
                    $sco->{$scodata->name} = $scodata->value;
430
                }
431
            }
432
        }
433
        return $scoes;
434
    } else {
435
        return false;
436
    }
437
}
438
 
439
/**
440
 * Insert SCORM track into db.
441
 *
442
 * @param int $userid The userid
443
 * @param int $scormid The id from scorm table
444
 * @param int $scoid The scoid
445
 * @param int|stdClass $attemptornumber - number of attempt or attempt record from scorm_attempt table.
446
 * @param string $element The element being saved
447
 * @param string $value The value of the element
448
 * @param boolean $forcecompleted Force this sco as completed
449
 * @param stdclass $trackdata - existing tracking data
450
 * @return int - the id of the record being saved.
451
 */
452
function scorm_insert_track($userid, $scormid, $scoid, $attemptornumber, $element, $value, $forcecompleted=false, $trackdata = null) {
453
    global $DB, $CFG;
454
 
455
    if (is_object($attemptornumber)) {
456
        $attempt = $attemptornumber;
457
    } else {
458
        $attempt = scorm_get_attempt($userid, $scormid, $attemptornumber);
459
    }
460
 
461
    $id = null;
462
 
463
    if ($forcecompleted) {
464
        // TODO - this could be broadened to encompass SCORM 2004 in future.
465
        if (($element == 'cmi.core.lesson_status') && ($value == 'incomplete')) {
466
            $track = scorm_get_sco_value($scoid, $userid, 'cmi.core.score.raw', $attempt->attempt);
467
            if (!empty($track)) {
468
                $value = 'completed';
469
            }
470
        }
471
        if ($element == 'cmi.core.score.raw') {
472
            $tracktest = scorm_get_sco_value($scoid, $userid, 'cmi.core.lesson_status', $attempt->attempt);
473
            if (!empty($tracktest)) {
474
                if ($tracktest->value == "incomplete") {
475
                    $v = new stdClass();
476
                    $v->id = $track->valueid;
477
                    $v->value = "completed";
478
                    $DB->update_record('scorm_scoes_value', $v);
479
                }
480
            }
481
        }
482
        if (($element == 'cmi.success_status') && ($value == 'passed' || $value == 'failed')) {
483
            if ($DB->get_record('scorm_scoes_data', array('scoid' => $scoid, 'name' => 'objectivesetbycontent'))) {
484
                $objectiveprogressstatus = true;
485
                $objectivesatisfiedstatus = false;
486
                if ($value == 'passed') {
487
                    $objectivesatisfiedstatus = true;
488
                }
489
                $track = scorm_get_sco_value($scoid, $userid, 'objectiveprogressstatus', $attempt->attempt);
490
                if (!empty($track)) {
491
                    $v = new stdClass();
492
                    $v->id = $track->valueid;
493
                    $v->value = $objectiveprogressstatus;
494
                    $v->timemodified = time();
495
                    $DB->update_record('scorm_scoes_value', $v);
496
                    $id = $track->valueid;
497
                } else {
498
                    $track = new stdClass();
499
                    $track->scoid = $scoid;
500
                    $track->attemptid = $attempt->id;
501
                    $track->elementid = scorm_get_elementid('objectiveprogressstatus');
502
                    $track->value = $objectiveprogressstatus;
503
                    $track->timemodified = time();
504
                    $id = $DB->insert_record('scorm_scoes_value', $track);
505
                }
506
                if ($objectivesatisfiedstatus) {
507
                    $track = scorm_get_sco_value($scoid, $userid, 'objectivesatisfiedstatus', $attempt->attempt);
508
                    if (!empty($track)) {
509
                        $v = new stdClass();
510
                        $v->id = $track->valueid;
511
                        $v->value = $objectivesatisfiedstatus;
512
                        $v->timemodified = time();
513
                        $DB->update_record('scorm_scoes_value', $v);
514
                        $id = $track->valueid;
515
                    } else {
516
                        $track = new stdClass();
517
                        $track->scoid = $scoid;
518
                        $track->attemptid = $attempt->id;
519
                        $track->elementid = scorm_get_elementid('objectivesatisfiedstatus');
520
                        $track->value = $objectivesatisfiedstatus;
521
                        $track->timemodified = time();
522
                        $id = $DB->insert_record('scorm_scoes_value', $track);
523
                    }
524
                }
525
            }
526
        }
527
 
528
    }
529
 
530
    $track = null;
531
    if ($trackdata !== null) {
532
        if (isset($trackdata[$element])) {
533
            $track = $trackdata[$element];
534
        }
535
    } else {
536
        $track = scorm_get_sco_value($scoid, $userid, $element, $attempt->attempt);
537
    }
538
    if ($track) {
539
        if ($element != 'x.start.time' ) { // Don't update x.start.time - keep the original value.
540
            if ($track->value != $value) {
541
                $v = new stdClass();
542
                $v->id = $track->valueid;
543
                $v->value = $value;
544
                $v->timemodified = time();
545
                $DB->update_record('scorm_scoes_value', $v);
546
            }
547
            $id = $track->valueid;
548
        }
549
    } else {
550
        $track = new stdClass();
551
        $track->scoid = $scoid;
552
        $track->attemptid = $attempt->id;
553
        $track->elementid = scorm_get_elementid($element);
554
        $track->value = $value;
555
        $track->timemodified = time();
556
        $id = $DB->insert_record('scorm_scoes_value', $track);
557
        $track->id = $id;
558
    }
559
 
560
    // Trigger updating grades based on a given set of SCORM CMI elements.
561
    $scorm = false;
562
    if (in_array($element, ['cmi.core.score.raw', 'cmi.score.raw']) ||
563
        (in_array($element, ['cmi.completion_status', 'cmi.core.lesson_status', 'cmi.success_status'])
564
         && in_array($value, ['completed', 'passed']))) {
565
        $scorm = $DB->get_record('scorm', array('id' => $scormid));
566
        include_once($CFG->dirroot.'/mod/scorm/lib.php');
567
        scorm_update_grades($scorm, $userid);
568
    }
569
 
570
    // Trigger CMI element events.
571
    if (in_array($element, ['cmi.core.score.raw', 'cmi.score.raw']) ||
572
        (in_array($element, ['cmi.completion_status', 'cmi.core.lesson_status', 'cmi.success_status'])
573
        && in_array($value, ['completed', 'failed', 'passed']))) {
574
        if (!$scorm) {
575
            $scorm = $DB->get_record('scorm', array('id' => $scormid));
576
        }
577
        $cm = get_coursemodule_from_instance('scorm', $scormid);
578
        $data = ['other' => ['attemptid' => $attempt->id, 'cmielement' => $element, 'cmivalue' => $value],
579
                 'objectid' => $scorm->id,
580
                 'context' => context_module::instance($cm->id),
581
                 'relateduserid' => $userid,
582
                ];
583
        if (in_array($element, array('cmi.core.score.raw', 'cmi.score.raw'))) {
584
            // Create score submitted event.
585
            $event = \mod_scorm\event\scoreraw_submitted::create($data);
586
        } else {
587
            // Create status submitted event.
588
            $event = \mod_scorm\event\status_submitted::create($data);
589
        }
590
        // Fix the missing track keys when the SCORM track record already exists, see $trackdata in datamodel.php.
591
        // There, for performances reasons, columns are limited to: element, id, value, timemodified.
592
        // Missing fields are: scoid, attemptid, elementid.
593
        $track->scoid = $scoid;
594
        $track->attemptid = $attempt->id;
595
        $track->elementid = scorm_get_elementid($element);
596
        $track->id = $id;
597
        // Trigger submitted event.
598
        $event->add_record_snapshot('scorm_scoes_value', $track);
599
        $event->add_record_snapshot('course_modules', $cm);
600
        $event->add_record_snapshot('scorm', $scorm);
601
        $event->trigger();
602
    }
603
 
604
    return $id;
605
}
606
 
607
/**
608
 * simple quick function to return true/false if this user has tracks in this scorm
609
 *
610
 * @param integer $scormid The scorm ID
611
 * @param integer $userid the users id
612
 * @return boolean (false if there are no tracks)
613
 */
614
function scorm_has_tracks($scormid, $userid) {
615
    global $DB;
616
    return $DB->record_exists('scorm_attempt', ['userid' => $userid, 'scormid' => $scormid]);
617
}
618
 
619
function scorm_get_tracks($scoid, $userid, $attempt='') {
620
    // Gets all tracks of specified sco and user.
621
    global $DB;
622
 
623
    if (empty($attempt)) {
624
        if ($scormid = $DB->get_field('scorm_scoes', 'scorm', ['id' => $scoid])) {
625
            $attempt = scorm_get_last_attempt($scormid, $userid);
626
        } else {
627
            $attempt = 1;
628
        }
629
    }
630
    $sql = "SELECT v.id, a.userid, a.scormid, v.scoid, a.attempt, v.value, v.timemodified, e.element
631
              FROM {scorm_attempt} a
632
              JOIN {scorm_scoes_value} v ON v.attemptid = a.id
633
              JOIN {scorm_element} e ON e.id = v.elementid
634
             WHERE a.userid = ? AND v.scoid = ? AND a.attempt = ?
635
          ORDER BY e.element ASC";
636
    if ($tracks = $DB->get_records_sql($sql, [$userid, $scoid, $attempt])) {
637
        $usertrack = scorm_format_interactions($tracks);
638
        $usertrack->userid = $userid;
639
        $usertrack->scoid = $scoid;
640
 
641
        return $usertrack;
642
    } else {
643
        return false;
644
    }
645
}
646
/**
647
 * helper function to return a formatted list of interactions for reports.
648
 *
649
 * @param array $trackdata the user tracking records from the database
650
 * @return object formatted list of interactions
651
 */
652
function scorm_format_interactions($trackdata) {
653
    $usertrack = new stdClass();
654
 
655
    // Defined in order to unify scorm1.2 and scorm2004.
656
    $usertrack->score_raw = '';
657
    $usertrack->status = '';
658
    $usertrack->total_time = '00:00:00';
659
    $usertrack->session_time = '00:00:00';
660
    $usertrack->timemodified = 0;
661
 
662
    foreach ($trackdata as $track) {
663
        $element = $track->element;
664
        $usertrack->{$element} = $track->value;
665
        switch ($element) {
666
            case 'cmi.core.lesson_status':
667
            case 'cmi.completion_status':
668
                if ($track->value == 'not attempted') {
669
                    $track->value = 'notattempted';
670
                }
671
                $usertrack->status = $track->value;
672
                break;
673
            case 'cmi.core.score.raw':
674
            case 'cmi.score.raw':
675
                $usertrack->score_raw = (float) sprintf('%2.2f', $track->value);
676
                break;
677
            case 'cmi.core.session_time':
678
            case 'cmi.session_time':
679
                $usertrack->session_time = $track->value;
680
                break;
681
            case 'cmi.core.total_time':
682
            case 'cmi.total_time':
683
                $usertrack->total_time = $track->value;
684
                break;
685
        }
686
        if (isset($track->timemodified) && ($track->timemodified > $usertrack->timemodified)) {
687
            $usertrack->timemodified = $track->timemodified;
688
        }
689
    }
690
 
691
    return $usertrack;
692
}
693
/* Find the start and finsh time for a a given SCO attempt
694
 *
695
 * @param int $scormid SCORM Id
696
 * @param int $scoid SCO Id
697
 * @param int $userid User Id
698
 * @param int $attemt Attempt Id
699
 *
700
 * @return object start and finsh time EPOC secods
701
 *
702
 */
703
function scorm_get_sco_runtime($scormid, $scoid, $userid, $attempt=1) {
704
    global $DB;
705
 
706
    $params = array('userid' => $userid, 'scormid' => $scormid, 'attempt' => $attempt);
707
    $sql = "SELECT min(timemodified) as start, max(timemodified) as finish
708
              FROM {scorm_scoes_value} v
709
              JOIN {scorm_attempt} a on a.id = v.attemptid
710
              WHERE a.userid = :userid AND a.scormid = :scormid AND a.attempt = :attempt";
711
    if (!empty($scoid)) {
712
        $params['scoid'] = $scoid;
713
        $sql .= " AND v.scoid = :scoid";
714
    }
715
    $timedata = $DB->get_record_sql($sql, $params);
716
    if (!empty($timedata)) {
717
        return $timedata;
718
    } else {
719
        $timedata = new stdClass();
720
        $timedata->start = false;
721
 
722
        return $timedata;
723
    }
724
}
725
 
726
function scorm_grade_user_attempt($scorm, $userid, $attempt=1) {
727
    global $DB;
728
    $attemptscore = new stdClass();
729
    $attemptscore->scoes = 0;
730
    $attemptscore->values = 0;
731
    $attemptscore->max = 0;
732
    $attemptscore->sum = 0;
733
    $attemptscore->lastmodify = 0;
734
 
735
    if (!$scoes = $DB->get_records('scorm_scoes', array('scorm' => $scorm->id), 'sortorder, id')) {
736
        return null;
737
    }
738
 
739
    foreach ($scoes as $sco) {
740
        if ($userdata = scorm_get_tracks($sco->id, $userid, $attempt)) {
741
            if (($userdata->status == 'completed') || ($userdata->status == 'passed')) {
742
                $attemptscore->scoes++;
743
            }
744
            if (!empty($userdata->score_raw) || (isset($scorm->type) && $scorm->type == 'sco' && isset($userdata->score_raw))) {
745
                $attemptscore->values++;
746
                $attemptscore->sum += $userdata->score_raw;
747
                $attemptscore->max = ($userdata->score_raw > $attemptscore->max) ? $userdata->score_raw : $attemptscore->max;
748
                if (isset($userdata->timemodified) && ($userdata->timemodified > $attemptscore->lastmodify)) {
749
                    $attemptscore->lastmodify = $userdata->timemodified;
750
                } else {
751
                    $attemptscore->lastmodify = 0;
752
                }
753
            }
754
        }
755
    }
756
    switch ($scorm->grademethod) {
757
        case GRADEHIGHEST:
758
            $score = (float) $attemptscore->max;
759
        break;
760
        case GRADEAVERAGE:
761
            if ($attemptscore->values > 0) {
762
                $score = $attemptscore->sum / $attemptscore->values;
763
            } else {
764
                $score = 0;
765
            }
766
        break;
767
        case GRADESUM:
768
            $score = $attemptscore->sum;
769
        break;
770
        case GRADESCOES:
771
            $score = $attemptscore->scoes;
772
        break;
773
        default:
774
            $score = $attemptscore->max;   // Remote Learner GRADEHIGHEST is default.
775
    }
776
 
777
    return $score;
778
}
779
 
780
function scorm_grade_user($scorm, $userid) {
781
 
782
    // Ensure we dont grade user beyond $scorm->maxattempt settings.
783
    $lastattempt = scorm_get_last_attempt($scorm->id, $userid);
784
    if ($scorm->maxattempt != 0 && $lastattempt >= $scorm->maxattempt) {
785
        $lastattempt = $scorm->maxattempt;
786
    }
787
 
788
    switch ($scorm->whatgrade) {
789
        case FIRSTATTEMPT:
790
            return scorm_grade_user_attempt($scorm, $userid, scorm_get_first_attempt($scorm->id, $userid));
791
        break;
792
        case LASTATTEMPT:
793
            return scorm_grade_user_attempt($scorm, $userid, scorm_get_last_completed_attempt($scorm->id, $userid));
794
        break;
795
        case HIGHESTATTEMPT:
796
            $maxscore = 0;
797
            for ($attempt = 1; $attempt <= $lastattempt; $attempt++) {
798
                $attemptscore = scorm_grade_user_attempt($scorm, $userid, $attempt);
799
                $maxscore = $attemptscore > $maxscore ? $attemptscore : $maxscore;
800
            }
801
            return $maxscore;
802
 
803
        break;
804
        case AVERAGEATTEMPT:
805
            $attemptcount = scorm_get_attempt_count($userid, $scorm, true, true);
806
            if (empty($attemptcount)) {
807
                return 0;
808
            } else {
809
                $attemptcount = count($attemptcount);
810
            }
811
            $lastattempt = scorm_get_last_attempt($scorm->id, $userid);
812
            $sumscore = 0;
813
            for ($attempt = 1; $attempt <= $lastattempt; $attempt++) {
814
                $attemptscore = scorm_grade_user_attempt($scorm, $userid, $attempt);
815
                $sumscore += $attemptscore;
816
            }
817
 
818
            return round($sumscore / $attemptcount);
819
        break;
820
    }
821
}
822
 
823
function scorm_count_launchable($scormid, $organization='') {
824
    global $DB;
825
 
826
    $sqlorganization = '';
827
    $params = array($scormid);
828
    if (!empty($organization)) {
829
        $sqlorganization = " AND organization=?";
830
        $params[] = $organization;
831
    }
832
    return $DB->count_records_select('scorm_scoes', "scorm = ? $sqlorganization AND ".
833
                                        $DB->sql_isnotempty('scorm_scoes', 'launch', false, true),
834
                                        $params);
835
}
836
 
837
/**
838
 * Returns the last attempt used - if no attempts yet, returns 1 for first attempt
839
 *
840
 * @param int $scormid the id of the scorm.
841
 * @param int $userid the id of the user.
842
 *
843
 * @return int The attempt number to use.
844
 */
845
function scorm_get_last_attempt($scormid, $userid) {
846
    global $DB;
847
 
848
    // Find the last attempt number for the given user id and scorm id.
849
    $sql = "SELECT MAX(attempt)
850
              FROM {scorm_attempt}
851
             WHERE userid = ? AND scormid = ?";
852
    $lastattempt = $DB->get_field_sql($sql, array($userid, $scormid));
853
    if (empty($lastattempt)) {
854
        return '1';
855
    } else {
856
        return $lastattempt;
857
    }
858
}
859
 
860
/**
861
 * Returns the first attempt used - if no attempts yet, returns 1 for first attempt.
862
 *
863
 * @param int $scormid the id of the scorm.
864
 * @param int $userid the id of the user.
865
 *
866
 * @return int The first attempt number.
867
 */
868
function scorm_get_first_attempt($scormid, $userid) {
869
    global $DB;
870
 
871
    // Find the first attempt number for the given user id and scorm id.
872
    $sql = "SELECT MIN(attempt)
873
              FROM {scorm_attempt}
874
             WHERE userid = ? AND scormid = ?";
875
 
876
    $lastattempt = $DB->get_field_sql($sql, array($userid, $scormid));
877
    if (empty($lastattempt)) {
878
        return '1';
879
    } else {
880
        return $lastattempt;
881
    }
882
}
883
 
884
/**
885
 * Returns the last completed attempt used - if no completed attempts yet, returns 1 for first attempt
886
 *
887
 * @param int $scormid the id of the scorm.
888
 * @param int $userid the id of the user.
889
 *
890
 * @return int The attempt number to use.
891
 */
892
function scorm_get_last_completed_attempt($scormid, $userid) {
893
    global $DB;
894
 
895
    // Find the last completed attempt number for the given user id and scorm id.
896
    $sql = "SELECT MAX(a.attempt)
897
              FROM {scorm_attempt} a
898
              JOIN {scorm_scoes_value} v ON v.attemptid = a.id
899
              JOIN {scorm_element} e ON e.id = v.elementid
900
             WHERE userid = ? AND scormid = ?
901
               AND (" . $DB->sql_compare_text('v.value') . " = " . $DB->sql_compare_text('?') . " OR ".
902
                    $DB->sql_compare_text('v.value') . " = " . $DB->sql_compare_text('?') . ")";
903
    $lastattempt = $DB->get_field_sql($sql, [$userid, $scormid, 'completed', 'passed']);
904
    if (empty($lastattempt)) {
905
        return '1';
906
    } else {
907
        return $lastattempt;
908
    }
909
}
910
 
911
/**
912
 * Returns the full list of attempts a user has made.
913
 *
914
 * @param int $scormid the id of the scorm.
915
 * @param int $userid the id of the user.
916
 *
917
 * @return array array of attemptids
918
 */
919
function scorm_get_all_attempts($scormid, $userid) {
920
    global $DB;
921
    $attemptids = array();
922
    $sql = "SELECT DISTINCT attempt FROM {scorm_attempt} WHERE userid = ? AND scormid = ? ORDER BY attempt";
923
    $attempts = $DB->get_records_sql($sql, [$userid, $scormid]);
924
    foreach ($attempts as $attempt) {
925
        $attemptids[] = $attempt->attempt;
926
    }
927
    return $attemptids;
928
}
929
 
930
/**
931
 * Displays the entry form and toc if required.
932
 *
933
 * @param  stdClass $user   user object
934
 * @param  stdClass $scorm  scorm object
935
 * @param  string   $action base URL for the organizations select box
936
 * @param  stdClass $cm     course module object
937
 */
938
function scorm_print_launch($user, $scorm, $action, $cm) {
939
    global $CFG, $DB, $OUTPUT;
940
 
941
    if ($scorm->updatefreq == SCORM_UPDATE_EVERYTIME) {
942
        scorm_parse($scorm, false);
943
    }
944
 
945
    $organization = optional_param('organization', '', PARAM_INT);
946
 
947
    if ($scorm->displaycoursestructure == 1) {
948
        echo $OUTPUT->box_start('generalbox boxaligncenter toc', 'toc');
949
        echo html_writer::div(get_string('contents', 'scorm'), 'structurehead');
950
    }
951
    if (empty($organization)) {
952
        $organization = $scorm->launch;
953
    }
954
    if ($orgs = $DB->get_records_select_menu('scorm_scoes', 'scorm = ? AND '.
955
                                         $DB->sql_isempty('scorm_scoes', 'launch', false, true).' AND '.
956
                                         $DB->sql_isempty('scorm_scoes', 'organization', false, false),
957
                                         array($scorm->id), 'sortorder, id', 'id,title')) {
958
        if (count($orgs) > 1) {
959
            $select = new single_select(new moodle_url($action), 'organization', $orgs, $organization, null);
960
            $select->label = get_string('organizations', 'scorm');
961
            $select->class = 'scorm-center';
962
            echo $OUTPUT->render($select);
963
        }
964
    }
965
    $orgidentifier = '';
966
    if ($sco = scorm_get_sco($organization, SCO_ONLY)) {
967
        if (($sco->organization == '') && ($sco->launch == '')) {
968
            $orgidentifier = $sco->identifier;
969
        } else {
970
            $orgidentifier = $sco->organization;
971
        }
972
    }
973
 
974
    $scorm->version = strtolower(clean_param($scorm->version, PARAM_SAFEDIR));   // Just to be safe.
975
    if (!file_exists($CFG->dirroot.'/mod/scorm/datamodels/'.$scorm->version.'lib.php')) {
976
        $scorm->version = 'scorm_12';
977
    }
978
    require_once($CFG->dirroot.'/mod/scorm/datamodels/'.$scorm->version.'lib.php');
979
 
980
    $result = scorm_get_toc($user, $scorm, $cm->id, TOCFULLURL, $orgidentifier);
981
    $incomplete = $result->incomplete;
982
    // Get latest incomplete sco to launch first if force new attempt isn't set to always.
983
    if (!empty($result->sco->id) && $scorm->forcenewattempt != SCORM_FORCEATTEMPT_ALWAYS) {
984
        $launchsco = $result->sco->id;
985
    } else {
986
        // Use launch defined by SCORM package.
987
        $launchsco = $scorm->launch;
988
    }
989
 
990
    // Do we want the TOC to be displayed?
991
    if ($scorm->displaycoursestructure == 1) {
992
        echo $result->toc;
993
        echo $OUTPUT->box_end();
994
    }
995
 
996
    // Is this the first attempt ?
997
    $attemptcount = scorm_get_attempt_count($user->id, $scorm);
998
 
999
    // Do not give the player launch FORM if the SCORM object is locked after the final attempt.
1000
    if ($scorm->lastattemptlock == 0 || $result->attemptleft > 0) {
1001
            echo html_writer::start_div('scorm-center');
1002
            echo html_writer::start_tag('form', array('id' => 'scormviewform',
1003
                                                        'method' => 'post',
1004
                                                        'action' => $CFG->wwwroot.'/mod/scorm/player.php'));
1005
        if ($scorm->hidebrowse == 0) {
1006
            echo html_writer::tag('button', get_string('browse', 'scorm'),
1007
                    ['class' => 'btn btn-secondary mr-1', 'name' => 'mode',
1008
                        'type' => 'submit', 'id' => 'b', 'value' => 'browse'])
1009
                . html_writer::end_tag('button');
1010
        } else {
1011
            echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'mode', 'value' => 'normal'));
1012
        }
1013
        echo html_writer::tag('button', get_string('enter', 'scorm'),
1014
                ['class' => 'btn btn-primary mx-1', 'name' => 'mode',
1015
                    'type' => 'submit', 'id' => 'n', 'value' => 'normal'])
1016
             . html_writer::end_tag('button');
1017
        if (!empty($scorm->forcenewattempt)) {
1018
            if ($scorm->forcenewattempt == SCORM_FORCEATTEMPT_ALWAYS ||
1019
                    ($scorm->forcenewattempt == SCORM_FORCEATTEMPT_ONCOMPLETE && $incomplete === false)) {
1020
                echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'newattempt', 'value' => 'on'));
1021
            }
1022
        } else if (!empty($attemptcount) && ($incomplete === false) && (($result->attemptleft > 0)||($scorm->maxattempt == 0))) {
1023
            echo html_writer::start_div('pt-1');
1024
            echo html_writer::checkbox('newattempt', 'on', false, '', array('id' => 'a'));
1025
            echo html_writer::label(get_string('newattempt', 'scorm'), 'a', true, ['class' => 'pl-1']);
1026
            echo html_writer::end_div();
1027
        }
1028
        if (!empty($scorm->popup)) {
1029
            echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'display', 'value' => 'popup'));
1030
        }
1031
 
1032
        echo html_writer::empty_tag('br');
1033
        echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'scoid', 'value' => $launchsco));
1034
        echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'cm', 'value' => $cm->id));
1035
        echo html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'currentorg', 'value' => $orgidentifier));
1036
        echo html_writer::end_tag('form');
1037
        echo html_writer::end_div();
1038
    }
1039
}
1040
 
1041
function scorm_simple_play($scorm, $user, $context, $cmid) {
1042
    global $DB;
1043
 
1044
    $result = false;
1045
 
1046
    if (has_capability('mod/scorm:viewreport', $context)) {
1047
        // If this user can view reports, don't skipview so they can see links to reports.
1048
        return $result;
1049
    }
1050
 
1051
    if ($scorm->updatefreq == SCORM_UPDATE_EVERYTIME) {
1052
        scorm_parse($scorm, false);
1053
    }
1054
    $scoes = $DB->get_records_select('scorm_scoes', 'scorm = ? AND '.
1055
        $DB->sql_isnotempty('scorm_scoes', 'launch', false, true), array($scorm->id), 'sortorder, id', 'id');
1056
 
1057
    if ($scoes) {
1058
        $orgidentifier = '';
1059
        if ($sco = scorm_get_sco($scorm->launch, SCO_ONLY)) {
1060
            if (($sco->organization == '') && ($sco->launch == '')) {
1061
                $orgidentifier = $sco->identifier;
1062
            } else {
1063
                $orgidentifier = $sco->organization;
1064
            }
1065
        }
1066
        if ($scorm->skipview >= SCORM_SKIPVIEW_FIRST) {
1067
            $sco = current($scoes);
1068
            $result = scorm_get_toc($user, $scorm, $cmid, TOCFULLURL, $orgidentifier);
1069
            $url = new moodle_url('/mod/scorm/player.php', array('a' => $scorm->id, 'currentorg' => $orgidentifier));
1070
 
1071
            // Set last incomplete sco to launch first if forcenewattempt not set to always.
1072
            if (!empty($result->sco->id) && $scorm->forcenewattempt != SCORM_FORCEATTEMPT_ALWAYS) {
1073
                $url->param('scoid', $result->sco->id);
1074
            } else {
1075
                $url->param('scoid', $sco->id);
1076
            }
1077
 
1078
            if ($scorm->skipview == SCORM_SKIPVIEW_ALWAYS || !scorm_has_tracks($scorm->id, $user->id)) {
1079
                if ($scorm->forcenewattempt == SCORM_FORCEATTEMPT_ALWAYS ||
1080
                   ($result->incomplete === false && $scorm->forcenewattempt == SCORM_FORCEATTEMPT_ONCOMPLETE)) {
1081
 
1082
                    $url->param('newattempt', 'on');
1083
                }
1084
                redirect($url);
1085
            }
1086
        }
1087
    }
1088
    return $result;
1089
}
1090
 
1091
function scorm_get_count_users($scormid, $groupingid=null) {
1092
    global $CFG, $DB;
1093
 
1094
    if (!empty($groupingid)) {
1095
        $sql = "SELECT COUNT(DISTINCT st.userid)
1096
                FROM {scorm_attempt} st
1097
                    INNER JOIN {groups_members} gm ON st.userid = gm.userid
1098
                    INNER JOIN {groupings_groups} gg ON gm.groupid = gg.groupid
1099
                WHERE st.scormid = ? AND gg.groupingid = ?
1100
                ";
1101
        $params = array($scormid, $groupingid);
1102
    } else {
1103
        $sql = "SELECT COUNT(DISTINCT st.userid)
1104
                FROM {scorm_attempt} st
1105
                WHERE st.scormid = ?
1106
                ";
1107
        $params = array($scormid);
1108
    }
1109
 
1110
    return ($DB->count_records_sql($sql, $params));
1111
}
1112
 
1113
/**
1114
 * Build up the JavaScript representation of an array element
1115
 *
1116
 * @param string $sversion SCORM API version
1117
 * @param array $userdata User track data
1118
 * @param string $elementname Name of array element to get values for
1119
 * @param array $children list of sub elements of this array element that also need instantiating
1120
 * @return Javascript array elements
1121
 */
1122
function scorm_reconstitute_array_element($sversion, $userdata, $elementname, $children) {
1123
    // Reconstitute comments_from_learner and comments_from_lms.
1124
    $current = '';
1125
    $currentsubelement = '';
1126
    $currentsub = '';
1127
    $count = 0;
1128
    $countsub = 0;
1129
    $scormseperator = '_';
1130
    $return = '';
1131
    if (scorm_version_check($sversion, SCORM_13)) { // Scorm 1.3 elements use a . instead of an _ .
1132
        $scormseperator = '.';
1133
    }
1134
    // Filter out the ones we want.
1135
    $elementlist = array();
1136
    foreach ($userdata as $element => $value) {
1137
        if (substr($element, 0, strlen($elementname)) == $elementname) {
1138
            $elementlist[$element] = $value;
1139
        }
1140
    }
1141
 
1142
    // Sort elements in .n array order.
1143
    uksort($elementlist, "scorm_element_cmp");
1144
 
1145
    // Generate JavaScript.
1146
    foreach ($elementlist as $element => $value) {
1147
        if (scorm_version_check($sversion, SCORM_13)) {
1148
            $element = preg_replace('/\.(\d+)\./', ".N\$1.", $element);
1149
            preg_match('/\.(N\d+)\./', $element, $matches);
1150
        } else {
1151
            $element = preg_replace('/\.(\d+)\./', "_\$1.", $element);
1152
            preg_match('/\_(\d+)\./', $element, $matches);
1153
        }
1154
        if (count($matches) > 0 && $current != $matches[1]) {
1155
            if ($countsub > 0) {
1156
                $return .= '    '.$elementname.$scormseperator.$current.'.'.$currentsubelement.'._count = '.$countsub.";\n";
1157
            }
1158
            $current = $matches[1];
1159
            $count++;
1160
            $currentsubelement = '';
1161
            $currentsub = '';
1162
            $countsub = 0;
1163
            $end = strpos($element, $matches[1]) + strlen($matches[1]);
1164
            $subelement = substr($element, 0, $end);
1165
            $return .= '    '.$subelement." = new Object();\n";
1166
            // Now add the children.
1167
            foreach ($children as $child) {
1168
                $return .= '    '.$subelement.".".$child." = new Object();\n";
1169
                $return .= '    '.$subelement.".".$child."._children = ".$child."_children;\n";
1170
            }
1171
        }
1172
 
1173
        // Now - flesh out the second level elements if there are any.
1174
        if (scorm_version_check($sversion, SCORM_13)) {
1175
            $element = preg_replace('/(.*?\.N\d+\..*?)\.(\d+)\./', "\$1.N\$2.", $element);
1176
            preg_match('/.*?\.N\d+\.(.*?)\.(N\d+)\./', $element, $matches);
1177
        } else {
1178
            $element = preg_replace('/(.*?\_\d+\..*?)\.(\d+)\./', "\$1_\$2.", $element);
1179
            preg_match('/.*?\_\d+\.(.*?)\_(\d+)\./', $element, $matches);
1180
        }
1181
 
1182
        // Check the sub element type.
1183
        if (count($matches) > 0 && $currentsubelement != $matches[1]) {
1184
            if ($countsub > 0) {
1185
                $return .= '    '.$elementname.$scormseperator.$current.'.'.$currentsubelement.'._count = '.$countsub.";\n";
1186
            }
1187
            $currentsubelement = $matches[1];
1188
            $currentsub = '';
1189
            $countsub = 0;
1190
            $end = strpos($element, $matches[1]) + strlen($matches[1]);
1191
            $subelement = substr($element, 0, $end);
1192
            $return .= '    '.$subelement." = new Object();\n";
1193
        }
1194
 
1195
        // Now check the subelement subscript.
1196
        if (count($matches) > 0 && $currentsub != $matches[2]) {
1197
            $currentsub = $matches[2];
1198
            $countsub++;
1199
            $end = strrpos($element, $matches[2]) + strlen($matches[2]);
1200
            $subelement = substr($element, 0, $end);
1201
            $return .= '    '.$subelement." = new Object();\n";
1202
        }
1203
 
1204
        $return .= '    '.$element.' = '.json_encode($value).";\n";
1205
    }
1206
    if ($countsub > 0) {
1207
        $return .= '    '.$elementname.$scormseperator.$current.'.'.$currentsubelement.'._count = '.$countsub.";\n";
1208
    }
1209
    if ($count > 0) {
1210
        $return .= '    '.$elementname.'._count = '.$count.";\n";
1211
    }
1212
    return $return;
1213
}
1214
 
1215
/**
1216
 * Build up the JavaScript representation of an array element
1217
 *
1218
 * @param string $a left array element
1219
 * @param string $b right array element
1220
 * @return comparator - 0,1,-1
1221
 */
1222
function scorm_element_cmp($a, $b) {
1223
    preg_match('/.*?(\d+)\./', $a, $matches);
1224
    $left = intval($matches[1]);
1225
    preg_match('/.?(\d+)\./', $b, $matches);
1226
    $right = intval($matches[1]);
1227
    if ($left < $right) {
1228
        return -1; // Smaller.
1229
    } else if ($left > $right) {
1230
        return 1;  // Bigger.
1231
    } else {
1232
        // Look for a second level qualifier eg cmi.interactions_0.correct_responses_0.pattern.
1233
        if (preg_match('/.*?(\d+)\.(.*?)\.(\d+)\./', $a, $matches)) {
1234
            $leftterm = intval($matches[2]);
1235
            $left = intval($matches[3]);
1236
            if (preg_match('/.*?(\d+)\.(.*?)\.(\d+)\./', $b, $matches)) {
1237
                $rightterm = intval($matches[2]);
1238
                $right = intval($matches[3]);
1239
                if ($leftterm < $rightterm) {
1240
                    return -1; // Smaller.
1241
                } else if ($leftterm > $rightterm) {
1242
                    return 1;  // Bigger.
1243
                } else {
1244
                    if ($left < $right) {
1245
                        return -1; // Smaller.
1246
                    } else if ($left > $right) {
1247
                        return 1;  // Bigger.
1248
                    }
1249
                }
1250
            }
1251
        }
1252
        // Fall back for no second level matches or second level matches are equal.
1253
        return 0;  // Equal to.
1254
    }
1255
}
1256
 
1257
/**
1258
 * Generate the user attempt status string
1259
 *
1260
 * @param object $user Current context user
1261
 * @param object $scorm a moodle scrom object - mdl_scorm
1262
 * @return string - Attempt status string
1263
 */
1264
function scorm_get_attempt_status($user, $scorm, $cm='') {
1265
    global $DB, $PAGE, $OUTPUT;
1266
 
1267
    $attempts = scorm_get_attempt_count($user->id, $scorm, true);
1268
    if (empty($attempts)) {
1269
        $attemptcount = 0;
1270
    } else {
1271
        $attemptcount = count($attempts);
1272
    }
1273
 
1274
    $result = html_writer::start_tag('p').get_string('noattemptsallowed', 'scorm').': ';
1275
    if ($scorm->maxattempt > 0) {
1276
        $result .= $scorm->maxattempt . html_writer::empty_tag('br');
1277
    } else {
1278
        $result .= get_string('unlimited').html_writer::empty_tag('br');
1279
    }
1280
    $result .= get_string('noattemptsmade', 'scorm').': ' . $attemptcount . html_writer::empty_tag('br');
1281
 
1282
    if ($scorm->maxattempt == 1) {
1283
        switch ($scorm->grademethod) {
1284
            case GRADEHIGHEST:
1285
                $grademethod = get_string('gradehighest', 'scorm');
1286
            break;
1287
            case GRADEAVERAGE:
1288
                $grademethod = get_string('gradeaverage', 'scorm');
1289
            break;
1290
            case GRADESUM:
1291
                $grademethod = get_string('gradesum', 'scorm');
1292
            break;
1293
            case GRADESCOES:
1294
                $grademethod = get_string('gradescoes', 'scorm');
1295
            break;
1296
        }
1297
    } else {
1298
        switch ($scorm->whatgrade) {
1299
            case HIGHESTATTEMPT:
1300
                $grademethod = get_string('highestattempt', 'scorm');
1301
            break;
1302
            case AVERAGEATTEMPT:
1303
                $grademethod = get_string('averageattempt', 'scorm');
1304
            break;
1305
            case FIRSTATTEMPT:
1306
                $grademethod = get_string('firstattempt', 'scorm');
1307
            break;
1308
            case LASTATTEMPT:
1309
                $grademethod = get_string('lastattempt', 'scorm');
1310
            break;
1311
        }
1312
    }
1313
 
1314
    if (!empty($attempts)) {
1315
        $i = 1;
1316
        foreach ($attempts as $attempt) {
1317
            $gradereported = scorm_grade_user_attempt($scorm, $user->id, $attempt->attemptnumber);
1318
            if ($scorm->grademethod !== GRADESCOES && !empty($scorm->maxgrade)) {
1319
                $gradereported = $gradereported / $scorm->maxgrade;
1320
                $gradereported = number_format($gradereported * 100, 0) .'%';
1321
            }
1322
            $result .= get_string('gradeforattempt', 'scorm').' ' . $i . ': ' . $gradereported .html_writer::empty_tag('br');
1323
            $i++;
1324
        }
1325
    }
1326
    $calculatedgrade = scorm_grade_user($scorm, $user->id);
1327
    if ($scorm->grademethod !== GRADESCOES && !empty($scorm->maxgrade)) {
1328
        $calculatedgrade = $calculatedgrade / $scorm->maxgrade;
1329
        $calculatedgrade = number_format($calculatedgrade * 100, 0) .'%';
1330
    }
1331
    $result .= get_string('grademethod', 'scorm'). ': ' . $grademethod;
1332
    if (empty($attempts)) {
1333
        $result .= html_writer::empty_tag('br').get_string('gradereported', 'scorm').
1334
                    ': '.get_string('none').html_writer::empty_tag('br');
1335
    } else {
1336
        $result .= html_writer::empty_tag('br').get_string('gradereported', 'scorm').
1337
                    ': '.$calculatedgrade.html_writer::empty_tag('br');
1338
    }
1339
    $result .= html_writer::end_tag('p');
1340
    if ($attemptcount >= $scorm->maxattempt and $scorm->maxattempt > 0) {
1341
        $result .= html_writer::tag('p', get_string('exceededmaxattempts', 'scorm'), array('class' => 'exceededmaxattempts'));
1342
    }
1343
    if (!empty($cm)) {
1344
        $context = context_module::instance($cm->id);
1345
        if (has_capability('mod/scorm:deleteownresponses', $context) &&
1346
            $DB->record_exists('scorm_attempt', ['userid' => $user->id, 'scormid' => $scorm->id])) {
1347
            // Check to see if any data is stored for this user.
1348
            $deleteurl = new moodle_url($PAGE->url, array('action' => 'delete', 'sesskey' => sesskey()));
1349
            $result .= $OUTPUT->single_button($deleteurl, get_string('deleteallattempts', 'scorm'));
1350
        }
1351
    }
1352
 
1353
    return $result;
1354
}
1355
 
1356
/**
1357
 * Get SCORM attempt count
1358
 *
1359
 * @param object $user Current context user
1360
 * @param object $scorm a moodle scrom object - mdl_scorm
1361
 * @param bool $returnobjects if true returns a object with attempts, if false returns count of attempts.
1362
 * @param bool $ignoremissingcompletion - ignores attempts that haven't reported a grade/completion.
1363
 * @return int - no. of attempts so far
1364
 */
1365
function scorm_get_attempt_count($userid, $scorm, $returnobjects = false, $ignoremissingcompletion = false) {
1366
    global $DB;
1367
 
1368
    // Historically attempts that don't report these elements haven't been included in the average attempts grading method
1369
    // we may want to change this in future, but to avoid unexpected grade decreases we're leaving this in. MDL-43222 .
1370
    if (scorm_version_check($scorm->version, SCORM_13)) {
1371
        $element = 'cmi.score.raw';
1372
    } else if ($scorm->grademethod == GRADESCOES) {
1373
        $element = 'cmi.core.lesson_status';
1374
    } else {
1375
        $element = 'cmi.core.score.raw';
1376
    }
1377
 
1378
    if ($returnobjects) {
1379
        $params = array('userid' => $userid, 'scormid' => $scorm->id);
1380
        if ($ignoremissingcompletion) { // Exclude attempts that don't have the completion element requested.
1381
            $params['element'] = $element;
1382
            $sql = "SELECT DISTINCT a.attempt AS attemptnumber
1383
              FROM {scorm_attempt} a
1384
              JOIN {scorm_scoes_value} v ON v.attemptid = a.id
1385
              JOIN {scorm_element} e ON e.id = v.elementid
1386
             WHERE a.userid = :userid AND a.scormid = :scormid AND e.element = :element ORDER BY a.attempt";
1387
            $attempts = $DB->get_records_sql($sql, $params);
1388
        } else {
1389
            $attempts = $DB->get_records('scorm_attempt', $params, 'attempt', 'DISTINCT attempt AS attemptnumber');
1390
        }
1391
 
1392
        return $attempts;
1393
    } else {
1394
        $params = ['userid' => $userid, 'scormid' => $scorm->id];
1395
        if ($ignoremissingcompletion) { // Exclude attempts that don't have the completion element requested.
1396
            $params['element'] = $element;
1397
            $sql = "SELECT COUNT(DISTINCT a.attempt)
1398
                      FROM {scorm_attempt} a
1399
                      JOIN {scorm_scoes_value} v ON v.attemptid = a.id
1400
                      JOIN {scorm_element} e ON e.id = v.elementid
1401
                     WHERE a.userid = :userid AND a.scormid = :scormid AND e.element = :element";
1402
        } else {
1403
            $sql = "SELECT COUNT(DISTINCT attempt)
1404
                      FROM {scorm_attempt}
1405
                     WHERE userid = :userid AND scormid = :scormid";
1406
        }
1407
 
1408
        $attemptscount = $DB->count_records_sql($sql, $params);
1409
        return $attemptscount;
1410
    }
1411
}
1412
 
1413
/**
1414
 * Figure out with this is a debug situation
1415
 *
1416
 * @param object $scorm a moodle scrom object - mdl_scorm
1417
 * @return boolean - debugging true/false
1418
 */
1419
function scorm_debugging($scorm) {
1420
    global $USER;
1421
    $cfgscorm = get_config('scorm');
1422
 
1423
    if (!$cfgscorm->allowapidebug) {
1424
        return false;
1425
    }
1426
    $identifier = $USER->username.':'.$scorm->name;
1427
    $test = $cfgscorm->apidebugmask;
1428
    // Check the regex is only a short list of safe characters.
1429
    if (!preg_match('/^[\w\s\*\.\?\+\:\_\\\]+$/', $test)) {
1430
        return false;
1431
    }
1432
 
1433
    if (preg_match('/^'.$test.'/', $identifier)) {
1434
        return true;
1435
    }
1436
    return false;
1437
}
1438
 
1439
/**
1440
 * Delete Scorm tracks for selected users
1441
 *
1442
 * @param array $attemptids list of attempts that need to be deleted
1443
 * @param stdClass $scorm instance
1444
 *
1445
 * @return bool true deleted all responses, false failed deleting an attempt - stopped here
1446
 */
1447
function scorm_delete_responses($attemptids, $scorm) {
1448
    if (!is_array($attemptids) || empty($attemptids)) {
1449
        return false;
1450
    }
1451
 
1452
    foreach ($attemptids as $num => $attemptid) {
1453
        if (empty($attemptid)) {
1454
            unset($attemptids[$num]);
1455
        }
1456
    }
1457
 
1458
    foreach ($attemptids as $attempt) {
1459
        $keys = explode(':', $attempt);
1460
        if (count($keys) == 2) {
1461
            $userid = clean_param($keys[0], PARAM_INT);
1462
            $attemptid = clean_param($keys[1], PARAM_INT);
1463
            if (!$userid || !$attemptid || !scorm_delete_attempt($userid, $scorm, $attemptid)) {
1464
                    return false;
1465
            }
1466
        } else {
1467
            return false;
1468
        }
1469
    }
1470
    return true;
1471
}
1472
 
1473
/**
1474
 * Delete Scorm tracks for selected users
1475
 *
1476
 * @param int $userid ID of User
1477
 * @param stdClass $scorm Scorm object
1478
 * @param int|stdClass $attemptornumber user attempt that need to be deleted
1479
 *
1480
 * @return bool true suceeded
1481
 */
1482
function scorm_delete_attempt($userid, $scorm, $attemptornumber) {
1483
    if (is_object($attemptornumber)) {
1484
        $attempt = $attemptornumber;
1485
    } else {
1486
        $attempt = scorm_get_attempt($userid, $scorm->id, $attemptornumber, false);
1487
    }
1488
 
1489
    scorm_delete_tracks($scorm->id, null, $userid, $attempt->id);
1490
    $cm = get_coursemodule_from_instance('scorm', $scorm->id);
1491
 
1492
    // Trigger instances list viewed event.
1493
    $event = \mod_scorm\event\attempt_deleted::create([
1494
         'other' => ['attemptid' => $attempt->attempt],
1495
         'context' => context_module::instance($cm->id),
1496
         'relateduserid' => $userid
1497
    ]);
1498
    $event->add_record_snapshot('course_modules', $cm);
1499
    $event->add_record_snapshot('scorm', $scorm);
1500
    $event->trigger();
1501
 
1502
    include_once('lib.php');
1503
    scorm_update_grades($scorm, $userid, true);
1504
    return true;
1505
}
1506
 
1507
/**
1508
 * Converts SCORM duration notation to human-readable format
1509
 * The function works with both SCORM 1.2 and SCORM 2004 time formats
1510
 * @param $duration string SCORM duration
1511
 * @return string human-readable date/time
1512
 */
1513
function scorm_format_duration($duration) {
1514
    // Fetch date/time strings.
1515
    $stryears = get_string('years');
1516
    $strmonths = get_string('nummonths');
1517
    $strdays = get_string('days');
1518
    $strhours = get_string('hours');
1519
    $strminutes = get_string('minutes');
1520
    $strseconds = get_string('seconds');
1521
 
1522
    if ($duration[0] == 'P') {
1523
        // If timestamp starts with 'P' - it's a SCORM 2004 format
1524
        // this regexp discards empty sections, takes Month/Minute ambiguity into consideration,
1525
        // and outputs filled sections, discarding leading zeroes and any format literals
1526
        // also saves the only zero before seconds decimals (if there are any) and discards decimals if they are zero.
1527
        $pattern = array( '#([A-Z])0+Y#', '#([A-Z])0+M#', '#([A-Z])0+D#', '#P(|\d+Y)0*(\d+)M#',
1528
                            '#0*(\d+)Y#', '#0*(\d+)D#', '#P#', '#([A-Z])0+H#', '#([A-Z])[0.]+S#',
1529
                            '#\.0+S#', '#T(|\d+H)0*(\d+)M#', '#0*(\d+)H#', '#0+\.(\d+)S#',
1530
                            '#0*([\d.]+)S#', '#T#' );
1531
        $replace = array( '$1', '$1', '$1', '$1$2 '.$strmonths.' ', '$1 '.$stryears.' ', '$1 '.$strdays.' ',
1532
                            '', '$1', '$1', 'S', '$1$2 '.$strminutes.' ', '$1 '.$strhours.' ',
1533
                            '0.$1 '.$strseconds, '$1 '.$strseconds, '');
1534
    } else {
1535
        // Else we have SCORM 1.2 format there
1536
        // first convert the timestamp to some SCORM 2004-like format for conveniency.
1537
        $duration = preg_replace('#^(\d+):(\d+):([\d.]+)$#', 'T$1H$2M$3S', $duration);
1538
        // Then convert in the same way as SCORM 2004.
1539
        $pattern = array( '#T0+H#', '#([A-Z])0+M#', '#([A-Z])[0.]+S#', '#\.0+S#', '#0*(\d+)H#',
1540
                            '#0*(\d+)M#', '#0+\.(\d+)S#', '#0*([\d.]+)S#', '#T#' );
1541
        $replace = array( 'T', '$1', '$1', 'S', '$1 '.$strhours.' ', '$1 '.$strminutes.' ',
1542
                            '0.$1 '.$strseconds, '$1 '.$strseconds, '' );
1543
    }
1544
 
1545
    $result = preg_replace($pattern, $replace, $duration);
1546
 
1547
    return $result;
1548
}
1549
 
1550
function scorm_get_toc_object($user, $scorm, $currentorg='', $scoid='', $mode='normal', $attempt='',
1551
                                $play=false, $organizationsco=null) {
1552
    global $CFG, $DB, $PAGE, $OUTPUT;
1553
 
1554
    // Always pass the mode even if empty as that is what is done elsewhere and the urls have to match.
1555
    $modestr = '&mode=';
1556
    if ($mode != 'normal') {
1557
        $modestr = '&mode='.$mode;
1558
    }
1559
 
1560
    $result = array();
1561
    $incomplete = false;
1562
 
1563
    if (!empty($organizationsco)) {
1564
        $result[0] = $organizationsco;
1565
        $result[0]->isvisible = 'true';
1566
        $result[0]->statusicon = '';
1567
        $result[0]->url = '';
1568
    }
1569
 
1570
    if ($scoes = scorm_get_scoes($scorm->id, $currentorg)) {
1571
        // Retrieve user tracking data for each learning object.
1572
        $usertracks = array();
1573
        foreach ($scoes as $sco) {
1574
            if (!empty($sco->launch)) {
1575
                if ($usertrack = scorm_get_tracks($sco->id, $user->id, $attempt)) {
1576
                    if ($usertrack->status == '') {
1577
                        $usertrack->status = 'notattempted';
1578
                    }
1579
                    $usertracks[$sco->identifier] = $usertrack;
1580
                }
1581
            }
1582
        }
1583
        foreach ($scoes as $sco) {
1584
            if (!isset($sco->isvisible)) {
1585
                $sco->isvisible = 'true';
1586
            }
1587
 
1588
            if (empty($sco->title)) {
1589
                $sco->title = $sco->identifier;
1590
            }
1591
 
1592
            if (scorm_version_check($scorm->version, SCORM_13)) {
1593
                $sco->prereq = true;
1594
            } else {
1595
                $sco->prereq = empty($sco->prerequisites) || scorm_eval_prerequisites($sco->prerequisites, $usertracks);
1596
            }
1597
 
1598
            if ($sco->isvisible === 'true') {
1599
                if (!empty($sco->launch)) {
1600
                    // Set first sco to launch if in browse/review mode.
1601
                    if (empty($scoid) && ($mode != 'normal')) {
1602
                        $scoid = $sco->id;
1603
                    }
1604
 
1605
                    if (isset($usertracks[$sco->identifier])) {
1606
                        $usertrack = $usertracks[$sco->identifier];
1607
 
1608
                        // Check we have a valid status string identifier.
1609
                        if ($statusstringexists = get_string_manager()->string_exists($usertrack->status, 'scorm')) {
1610
                            $strstatus = get_string($usertrack->status, 'scorm');
1611
                        } else {
1612
                            $strstatus = get_string('invalidstatus', 'scorm');
1613
                        }
1614
 
1615
                        if ($sco->scormtype == 'sco') {
1616
                            // Assume if we didn't get a valid status string, we don't have an icon either.
1617
                            $statusicon = $OUTPUT->pix_icon($statusstringexists ? $usertrack->status : 'incomplete',
1618
                                $strstatus, 'scorm');
1619
                        } else {
1620
                            $statusicon = $OUTPUT->pix_icon('asset', get_string('assetlaunched', 'scorm'), 'scorm');
1621
                        }
1622
 
1623
                        if (($usertrack->status == 'notattempted') ||
1624
                                ($usertrack->status == 'incomplete') ||
1625
                                ($usertrack->status == 'browsed')) {
1626
                            $incomplete = true;
1627
                            if (empty($scoid)) {
1628
                                $scoid = $sco->id;
1629
                            }
1630
                        }
1631
 
1632
                        $strsuspended = get_string('suspended', 'scorm');
1633
 
1634
                        $exitvar = 'cmi.core.exit';
1635
 
1636
                        if (scorm_version_check($scorm->version, SCORM_13)) {
1637
                            $exitvar = 'cmi.exit';
1638
                        }
1639
 
1640
                        if ($incomplete && isset($usertrack->{$exitvar}) && ($usertrack->{$exitvar} == 'suspend')) {
1641
                            $statusicon = $OUTPUT->pix_icon('suspend', $strstatus.' - '.$strsuspended, 'scorm');
1642
                        }
1643
 
1644
                    } else {
1645
                        if (empty($scoid)) {
1646
                            $scoid = $sco->id;
1647
                        }
1648
 
1649
                        $incomplete = true;
1650
 
1651
                        if ($sco->scormtype == 'sco') {
1652
                            $statusicon = $OUTPUT->pix_icon('notattempted', get_string('notattempted', 'scorm'), 'scorm');
1653
                        } else {
1654
                            $statusicon = $OUTPUT->pix_icon('asset', get_string('asset', 'scorm'), 'scorm');
1655
                        }
1656
                    }
1657
                }
1658
            }
1659
 
1660
            if (empty($statusicon)) {
1661
                $sco->statusicon = $OUTPUT->pix_icon('notattempted', get_string('notattempted', 'scorm'), 'scorm');
1662
            } else {
1663
                $sco->statusicon = $statusicon;
1664
            }
1665
 
1666
            $sco->url = 'a='.$scorm->id.'&scoid='.$sco->id.'&currentorg='.$currentorg.$modestr.'&attempt='.$attempt;
1667
            $sco->incomplete = $incomplete;
1668
 
1669
            if (!in_array($sco->id, array_keys($result))) {
1670
                $result[$sco->id] = $sco;
1671
            }
1672
        }
1673
    }
1674
 
1675
    // Get the parent scoes!
1676
    $result = scorm_get_toc_get_parent_child($result, $currentorg);
1677
 
1678
    // Be safe, prevent warnings from showing up while returning array.
1679
    if (!isset($scoid)) {
1680
        $scoid = '';
1681
    }
1682
 
1683
    return array('scoes' => $result, 'usertracks' => $usertracks, 'scoid' => $scoid);
1684
}
1685
 
1686
function scorm_get_toc_get_parent_child(&$result, $currentorg) {
1687
    $final = array();
1688
    $level = 0;
1689
    // Organization is always the root, prevparent.
1690
    if (!empty($currentorg)) {
1691
        $prevparent = $currentorg;
1692
    } else {
1693
        $prevparent = '/';
1694
    }
1695
 
1696
    foreach ($result as $sco) {
1697
        if ($sco->parent == '/') {
1698
            $final[$level][$sco->identifier] = $sco;
1699
            $prevparent = $sco->identifier;
1700
            unset($result[$sco->id]);
1701
        } else {
1702
            if ($sco->parent == $prevparent) {
1703
                $final[$level][$sco->identifier] = $sco;
1704
                $prevparent = $sco->identifier;
1705
                unset($result[$sco->id]);
1706
            } else {
1707
                if (!empty($final[$level])) {
1708
                    $found = false;
1709
                    foreach ($final[$level] as $fin) {
1710
                        if ($sco->parent == $fin->identifier) {
1711
                            $found = true;
1712
                        }
1713
                    }
1714
 
1715
                    if ($found) {
1716
                        $final[$level][$sco->identifier] = $sco;
1717
                        unset($result[$sco->id]);
1718
                        $found = false;
1719
                    } else {
1720
                        $level++;
1721
                        $final[$level][$sco->identifier] = $sco;
1722
                        unset($result[$sco->id]);
1723
                    }
1724
                }
1725
            }
1726
        }
1727
    }
1728
 
1729
    for ($i = 0; $i <= $level; $i++) {
1730
        $prevparent = '';
1731
        foreach ($final[$i] as $ident => $sco) {
1732
            if (empty($prevparent)) {
1733
                $prevparent = $ident;
1734
            }
1735
            if (!isset($final[$i][$prevparent]->children)) {
1736
                $final[$i][$prevparent]->children = array();
1737
            }
1738
            if ($sco->parent == $prevparent) {
1739
                $final[$i][$prevparent]->children[] = $sco;
1740
                $prevparent = $ident;
1741
            } else {
1742
                $parent = false;
1743
                foreach ($final[$i] as $identifier => $scoobj) {
1744
                    if ($identifier == $sco->parent) {
1745
                        $parent = $identifier;
1746
                    }
1747
                }
1748
 
1749
                if ($parent !== false) {
1750
                    $final[$i][$parent]->children[] = $sco;
1751
                }
1752
            }
1753
        }
1754
    }
1755
 
1756
    $results = array();
1757
    for ($i = 0; $i <= $level; $i++) {
1758
        $keys = array_keys($final[$i]);
1759
        $results[] = $final[$i][$keys[0]];
1760
    }
1761
 
1762
    return $results;
1763
}
1764
 
1765
function scorm_format_toc_for_treeview($user, $scorm, $scoes, $usertracks, $cmid, $toclink=TOCJSLINK, $currentorg='',
1766
                                        $attempt='', $play=false, $organizationsco=null, $children=false) {
1767
    global $CFG;
1768
 
1769
    $result = new stdClass();
1770
    $result->prerequisites = true;
1771
    $result->incomplete = true;
1772
    $result->toc = '';
1773
 
1774
    if (!$children) {
1775
        $attemptsmade = scorm_get_attempt_count($user->id, $scorm);
1776
        $result->attemptleft = $scorm->maxattempt == 0 ? 1 : $scorm->maxattempt - $attemptsmade;
1777
    }
1778
 
1779
    if (!$children) {
1780
        $result->toc = html_writer::start_tag('ul');
1781
 
1782
        if (!$play && !empty($organizationsco)) {
1783
            $result->toc .= html_writer::start_tag('li').$organizationsco->title.html_writer::end_tag('li');
1784
        }
1785
    }
1786
 
1787
    $prevsco = '';
1788
    if (!empty($scoes)) {
1789
        foreach ($scoes as $sco) {
1790
 
1791
            if ($sco->isvisible === 'false') {
1792
                continue;
1793
            }
1794
 
1795
            $result->toc .= html_writer::start_tag('li');
1796
            $scoid = $sco->id;
1797
 
1798
            $score = '';
1799
 
1800
            if (isset($usertracks[$sco->identifier])) {
1801
                $viewscore = has_capability('mod/scorm:viewscores', context_module::instance($cmid));
1802
                if (isset($usertracks[$sco->identifier]->score_raw) && $viewscore) {
1803
                    if ($usertracks[$sco->identifier]->score_raw != '') {
1804
                        $score = '('.get_string('score', 'scorm').':&nbsp;'.$usertracks[$sco->identifier]->score_raw.')';
1805
                    }
1806
                }
1807
            }
1808
 
1809
            if (!empty($sco->prereq)) {
1810
                if ($sco->id == $scoid) {
1811
                    $result->prerequisites = true;
1812
                }
1813
 
1814
                if (!empty($prevsco) && scorm_version_check($scorm->version, SCORM_13) && !empty($prevsco->hidecontinue)) {
1815
                    if ($sco->scormtype == 'sco') {
1816
                        $result->toc .= html_writer::span($sco->statusicon.'&nbsp;'.format_string($sco->title));
1817
                    } else {
1818
                        $result->toc .= html_writer::span('&nbsp;'.format_string($sco->title));
1819
                    }
1820
                } else if ($toclink == TOCFULLURL) {
1821
                    $url = $CFG->wwwroot.'/mod/scorm/player.php?'.$sco->url;
1822
                    if (!empty($sco->launch)) {
1823
                        if ($sco->scormtype == 'sco') {
1824
                            $result->toc .= $sco->statusicon.'&nbsp;';
1825
                            $result->toc .= html_writer::link($url, format_string($sco->title)).$score;
1826
                        } else {
1827
                            $result->toc .= '&nbsp;'.html_writer::link($url, format_string($sco->title),
1828
                                                                        array('data-scoid' => $sco->id)).$score;
1829
                        }
1830
                    } else {
1831
                        if ($sco->scormtype == 'sco') {
1832
                            $result->toc .= $sco->statusicon.'&nbsp;'.format_string($sco->title).$score;
1833
                        } else {
1834
                            $result->toc .= '&nbsp;'.format_string($sco->title).$score;
1835
                        }
1836
                    }
1837
                } else {
1838
                    if (!empty($sco->launch)) {
1839
                        if ($sco->scormtype == 'sco') {
1840
                            $result->toc .= html_writer::tag('a', $sco->statusicon.'&nbsp;'.
1841
                                                                format_string($sco->title).'&nbsp;'.$score,
1842
                                                                array('data-scoid' => $sco->id, 'title' => $sco->url));
1843
                        } else {
1844
                            $result->toc .= html_writer::tag('a', '&nbsp;'.format_string($sco->title).'&nbsp;'.$score,
1845
                                                                array('data-scoid' => $sco->id, 'title' => $sco->url));
1846
                        }
1847
                    } else {
1848
                        if ($sco->scormtype == 'sco') {
1849
                            $result->toc .= html_writer::span($sco->statusicon.'&nbsp;'.format_string($sco->title));
1850
                        } else {
1851
                            $result->toc .= html_writer::span('&nbsp;'.format_string($sco->title));
1852
                        }
1853
                    }
1854
                }
1855
 
1856
            } else {
1857
                if ($play) {
1858
                    if ($sco->scormtype == 'sco') {
1859
                        $result->toc .= html_writer::span($sco->statusicon.'&nbsp;'.format_string($sco->title));
1860
                    } else {
1861
                        $result->toc .= '&nbsp;'.format_string($sco->title).html_writer::end_span();
1862
                    }
1863
                } else {
1864
                    if ($sco->scormtype == 'sco') {
1865
                        $result->toc .= $sco->statusicon.'&nbsp;'.format_string($sco->title);
1866
                    } else {
1867
                        $result->toc .= '&nbsp;'.format_string($sco->title);
1868
                    }
1869
                }
1870
            }
1871
 
1872
            if (!empty($sco->children)) {
1873
                $result->toc .= html_writer::start_tag('ul');
1874
                $childresult = scorm_format_toc_for_treeview($user, $scorm, $sco->children, $usertracks, $cmid,
1875
                                                                $toclink, $currentorg, $attempt, $play, $organizationsco, true);
1876
 
1877
                // Is any of the children incomplete?
1878
                $sco->incomplete = $childresult->incomplete;
1879
                $result->toc .= $childresult->toc;
1880
                $result->toc .= html_writer::end_tag('ul');
1881
                $result->toc .= html_writer::end_tag('li');
1882
            } else {
1883
                $result->toc .= html_writer::end_tag('li');
1884
            }
1885
            $prevsco = $sco;
1886
        }
1887
        $result->incomplete = $sco->incomplete;
1888
    }
1889
 
1890
    if (!$children) {
1891
        $result->toc .= html_writer::end_tag('ul');
1892
    }
1893
 
1894
    return $result;
1895
}
1896
 
1897
function scorm_format_toc_for_droplist($scorm, $scoes, $usertracks, $currentorg='', $organizationsco=null,
1898
                                        $children=false, $level=0, $tocmenus=array()) {
1899
    if (!empty($scoes)) {
1900
        if (!empty($organizationsco) && !$children) {
1901
            $tocmenus[$organizationsco->id] = $organizationsco->title;
1902
        }
1903
 
1904
        $parents[$level] = '/';
1905
        foreach ($scoes as $sco) {
1906
            if ($parents[$level] != $sco->parent) {
1907
                if ($newlevel = array_search($sco->parent, $parents)) {
1908
                    $level = $newlevel;
1909
                } else {
1910
                    $i = $level;
1911
                    while (($i > 0) && ($parents[$level] != $sco->parent)) {
1912
                        $i--;
1913
                    }
1914
 
1915
                    if (($i == 0) && ($sco->parent != $currentorg)) {
1916
                        $level++;
1917
                    } else {
1918
                        $level = $i;
1919
                    }
1920
 
1921
                    $parents[$level] = $sco->parent;
1922
                }
1923
            }
1924
 
1925
            if ($sco->scormtype == 'sco') {
1926
                $tocmenus[$sco->id] = scorm_repeater('&minus;', $level) . '&gt;' . format_string($sco->title);
1927
            }
1928
 
1929
            if (!empty($sco->children)) {
1930
                $tocmenus = scorm_format_toc_for_droplist($scorm, $sco->children, $usertracks, $currentorg,
1931
                                                            $organizationsco, true, $level, $tocmenus);
1932
            }
1933
        }
1934
    }
1935
 
1936
    return $tocmenus;
1937
}
1938
 
1939
function scorm_get_toc($user, $scorm, $cmid, $toclink=TOCJSLINK, $currentorg='', $scoid='', $mode='normal',
1940
                        $attempt='', $play=false, $tocheader=false) {
1941
    global $CFG, $DB, $OUTPUT;
1942
 
1943
    if (empty($attempt)) {
1944
        $attempt = scorm_get_last_attempt($scorm->id, $user->id);
1945
    }
1946
 
1947
    $result = new stdClass();
1948
    $organizationsco = null;
1949
 
1950
    if ($tocheader) {
1951
        $result->toc = html_writer::start_div('yui3-g-r', array('id' => 'scorm_layout'));
1952
        $result->toc .= html_writer::start_div('yui3-u-1-5 loading', array('id' => 'scorm_toc'));
1953
        $result->toc .= html_writer::div('', '', array('id' => 'scorm_toc_title'));
1954
        $result->toc .= html_writer::start_div('', array('id' => 'scorm_tree'));
1955
    }
1956
 
1957
    if (!empty($currentorg)) {
1958
        $organizationsco = $DB->get_record('scorm_scoes', array('scorm' => $scorm->id, 'identifier' => $currentorg));
1959
        if (!empty($organizationsco->title)) {
1960
            if ($play) {
1961
                $result->toctitle = $organizationsco->title;
1962
            }
1963
        }
1964
    }
1965
 
1966
    $scoes = scorm_get_toc_object($user, $scorm, $currentorg, $scoid, $mode, $attempt, $play, $organizationsco);
1967
 
1968
    $treeview = scorm_format_toc_for_treeview($user, $scorm, $scoes['scoes'][0]->children, $scoes['usertracks'], $cmid,
1969
                                                $toclink, $currentorg, $attempt, $play, $organizationsco, false);
1970
 
1971
    if ($tocheader) {
1972
        $result->toc .= $treeview->toc;
1973
    } else {
1974
        $result->toc = $treeview->toc;
1975
    }
1976
 
1977
    if (!empty($scoes['scoid'])) {
1978
        $scoid = $scoes['scoid'];
1979
    }
1980
 
1981
    if (empty($scoid)) {
1982
        // If this is a normal package with an org sco and child scos get the first child.
1983
        if (!empty($scoes['scoes'][0]->children)) {
1984
            $result->sco = $scoes['scoes'][0]->children[0];
1985
        } else { // This package only has one sco - it may be a simple external AICC package.
1986
            $result->sco = $scoes['scoes'][0];
1987
        }
1988
 
1989
    } else {
1990
        $result->sco = scorm_get_sco($scoid);
1991
    }
1992
 
1993
    if ($scorm->hidetoc == SCORM_TOC_POPUP) {
1994
        $tocmenu = scorm_format_toc_for_droplist($scorm, $scoes['scoes'][0]->children, $scoes['usertracks'],
1995
                                                    $currentorg, $organizationsco);
1996
 
1997
        $modestr = '';
1998
        if ($mode != 'normal') {
1999
            $modestr = '&mode='.$mode;
2000
        }
2001
 
2002
        $url = new moodle_url('/mod/scorm/player.php?a='.$scorm->id.'&currentorg='.$currentorg.$modestr);
2003
        $result->tocmenu = $OUTPUT->single_select($url, 'scoid', $tocmenu, $result->sco->id, null, "tocmenu");
2004
    }
2005
 
2006
    $result->prerequisites = $treeview->prerequisites;
2007
    $result->incomplete = $treeview->incomplete;
2008
    $result->attemptleft = $treeview->attemptleft;
2009
 
2010
    if ($tocheader) {
2011
        $result->toc .= html_writer::end_div().html_writer::end_div();
2012
        $result->toc .= html_writer::start_div('loading', array('id' => 'scorm_toc_toggle'));
2013
        $result->toc .= html_writer::tag('button', '', array('id' => 'scorm_toc_toggle_btn')).html_writer::end_div();
2014
        $result->toc .= html_writer::start_div('', array('id' => 'scorm_content'));
2015
        $result->toc .= html_writer::div('', '', array('id' => 'scorm_navpanel'));
2016
        $result->toc .= html_writer::end_div().html_writer::end_div();
2017
    }
2018
 
2019
    return $result;
2020
}
2021
 
2022
function scorm_get_adlnav_json ($scoes, &$adlnav = array(), $parentscoid = null) {
2023
    if (is_object($scoes)) {
2024
        $sco = $scoes;
2025
        if (isset($sco->url)) {
2026
            $adlnav[$sco->id]['identifier'] = $sco->identifier;
2027
            $adlnav[$sco->id]['launch'] = $sco->launch;
2028
            $adlnav[$sco->id]['title'] = $sco->title;
2029
            $adlnav[$sco->id]['url'] = $sco->url;
2030
            $adlnav[$sco->id]['parent'] = $sco->parent;
2031
            if (isset($sco->choice)) {
2032
                $adlnav[$sco->id]['choice'] = $sco->choice;
2033
            }
2034
            if (isset($sco->flow)) {
2035
                $adlnav[$sco->id]['flow'] = $sco->flow;
2036
            } else if (isset($parentscoid) && isset($adlnav[$parentscoid]['flow'])) {
2037
                $adlnav[$sco->id]['flow'] = $adlnav[$parentscoid]['flow'];
2038
            }
2039
            if (isset($sco->isvisible)) {
2040
                $adlnav[$sco->id]['isvisible'] = $sco->isvisible;
2041
            }
2042
            if (isset($sco->parameters)) {
2043
                $adlnav[$sco->id]['parameters'] = $sco->parameters;
2044
            }
2045
            if (isset($sco->hidecontinue)) {
2046
                $adlnav[$sco->id]['hidecontinue'] = $sco->hidecontinue;
2047
            }
2048
            if (isset($sco->hideprevious)) {
2049
                $adlnav[$sco->id]['hideprevious'] = $sco->hideprevious;
2050
            }
2051
            if (isset($sco->hidesuspendall)) {
2052
                $adlnav[$sco->id]['hidesuspendall'] = $sco->hidesuspendall;
2053
            }
2054
            if (!empty($parentscoid)) {
2055
                $adlnav[$sco->id]['parentscoid'] = $parentscoid;
2056
            }
2057
            if (isset($adlnav['prevscoid'])) {
2058
                $adlnav[$sco->id]['prevscoid'] = $adlnav['prevscoid'];
2059
                $adlnav[$adlnav['prevscoid']]['nextscoid'] = $sco->id;
2060
                if (isset($adlnav['prevparent']) && $adlnav['prevparent'] == $sco->parent) {
2061
                    $adlnav[$sco->id]['prevsibling'] = $adlnav['prevscoid'];
2062
                    $adlnav[$adlnav['prevscoid']]['nextsibling'] = $sco->id;
2063
                }
2064
            }
2065
            $adlnav['prevscoid'] = $sco->id;
2066
            $adlnav['prevparent'] = $sco->parent;
2067
        }
2068
        if (isset($sco->children)) {
2069
            foreach ($sco->children as $children) {
2070
                scorm_get_adlnav_json($children, $adlnav, $sco->id);
2071
            }
2072
        }
2073
    } else {
2074
        foreach ($scoes as $sco) {
2075
            scorm_get_adlnav_json ($sco, $adlnav);
2076
        }
2077
        unset($adlnav['prevscoid']);
2078
        unset($adlnav['prevparent']);
2079
    }
2080
    return json_encode($adlnav);
2081
}
2082
 
2083
/**
2084
 * Check for the availability of a resource by URL.
2085
 *
2086
 * Check is performed using an HTTP HEAD call.
2087
 *
2088
 * @param $url string A valid URL
2089
 * @return bool|string True if no issue is found. The error string message, otherwise
2090
 */
2091
function scorm_check_url($url) {
2092
    $curl = new curl;
2093
    // Same options as in {@link download_file_content()}, used in {@link scorm_parse_scorm()}.
2094
    $curl->setopt(array('CURLOPT_FOLLOWLOCATION' => true, 'CURLOPT_MAXREDIRS' => 5));
2095
    $cmsg = $curl->head($url);
2096
    $info = $curl->get_info();
2097
    if (empty($info['http_code']) || $info['http_code'] != 200) {
2098
        return get_string('invalidurlhttpcheck', 'scorm', array('cmsg' => $cmsg));
2099
    }
2100
 
2101
    return true;
2102
}
2103
 
2104
/**
2105
 * Check for a parameter in userdata and return it if it's set
2106
 * or return the value from $ifempty if its empty
2107
 *
2108
 * @param stdClass $userdata Contains user's data
2109
 * @param string $param parameter that should be checked
2110
 * @param string $ifempty value to be replaced with if $param is not set
2111
 * @return string value from $userdata->$param if its not empty, or $ifempty
2112
 */
2113
function scorm_isset($userdata, $param, $ifempty = '') {
2114
    if (isset($userdata->$param)) {
2115
        return $userdata->$param;
2116
    } else {
2117
        return $ifempty;
2118
    }
2119
}
2120
 
2121
/**
2122
 * Check if the current sco is launchable
2123
 * If not, find the next launchable sco
2124
 *
2125
 * @param stdClass $scorm Scorm object
2126
 * @param integer $scoid id of scorm_scoes record.
2127
 * @return integer scoid of correct sco to launch or empty if one cannot be found, which will trigger first sco.
2128
 */
2129
function scorm_check_launchable_sco($scorm, $scoid) {
2130
    global $DB;
2131
    if ($sco = scorm_get_sco($scoid, SCO_ONLY)) {
2132
        if ($sco->launch == '') {
2133
            // This scoid might be a top level org that can't be launched, find the first launchable sco after this sco.
2134
            $scoes = $DB->get_records_select('scorm_scoes',
2135
                                             'scorm = ? AND '.$DB->sql_isnotempty('scorm_scoes', 'launch', false, true).
2136
                                             ' AND id > ?', array($scorm->id, $sco->id), 'sortorder, id', 'id', 0, 1);
2137
            if (!empty($scoes)) {
2138
                $sco = reset($scoes); // Get first item from the list.
2139
                return $sco->id;
2140
            }
2141
        } else {
2142
            return $sco->id;
2143
        }
2144
    }
2145
    // Returning 0 will cause default behaviour which will find the first launchable sco in the package.
2146
    return 0;
2147
}
2148
 
2149
/**
2150
 * Check if a SCORM is available for the current user.
2151
 *
2152
 * @param  stdClass  $scorm            SCORM record
2153
 * @param  boolean $checkviewreportcap Check the scorm:viewreport cap
2154
 * @param  stdClass  $context          Module context, required if $checkviewreportcap is set to true
2155
 * @param  int  $userid                User id override
2156
 * @return array                       status (available or not and possible warnings)
2157
 * @since  Moodle 3.0
2158
 */
2159
function scorm_get_availability_status($scorm, $checkviewreportcap = false, $context = null, $userid = null) {
2160
    $open = true;
2161
    $closed = false;
2162
    $warnings = array();
2163
 
2164
    $timenow = time();
2165
    if (!empty($scorm->timeopen) and $scorm->timeopen > $timenow) {
2166
        $open = false;
2167
    }
2168
    if (!empty($scorm->timeclose) and $timenow > $scorm->timeclose) {
2169
        $closed = true;
2170
    }
2171
 
2172
    if (!$open or $closed) {
2173
        if ($checkviewreportcap and !empty($context) and has_capability('mod/scorm:viewreport', $context, $userid)) {
2174
            return array(true, $warnings);
2175
        }
2176
 
2177
        if (!$open) {
2178
            $warnings['notopenyet'] = userdate($scorm->timeopen);
2179
        }
2180
        if ($closed) {
2181
            $warnings['expired'] = userdate($scorm->timeclose);
2182
        }
2183
        return array(false, $warnings);
2184
    }
2185
 
2186
    // Scorm is available.
2187
    return array(true, $warnings);
2188
}
2189
 
2190
/**
2191
 * Requires a SCORM package to be available for the current user.
2192
 *
2193
 * @param  stdClass  $scorm            SCORM record
2194
 * @param  boolean $checkviewreportcap Check the scorm:viewreport cap
2195
 * @param  stdClass  $context          Module context, required if $checkviewreportcap is set to true
2196
 * @throws moodle_exception
2197
 * @since  Moodle 3.0
2198
 */
2199
function scorm_require_available($scorm, $checkviewreportcap = false, $context = null) {
2200
 
2201
    list($available, $warnings) = scorm_get_availability_status($scorm, $checkviewreportcap, $context);
2202
 
2203
    if (!$available) {
2204
        $reason = current(array_keys($warnings));
2205
        throw new moodle_exception($reason, 'scorm', '', $warnings[$reason]);
2206
    }
2207
 
2208
}
2209
 
2210
/**
2211
 * Return a SCO object and the SCO launch URL
2212
 *
2213
 * @param  stdClass $scorm SCORM object
2214
 * @param  int $scoid The SCO id in database
2215
 * @param  stdClass $context context object
2216
 * @return array the SCO object and URL
2217
 * @since  Moodle 3.1
2218
 */
2219
function scorm_get_sco_and_launch_url($scorm, $scoid, $context) {
2220
    global $CFG, $DB;
2221
 
2222
    if (!empty($scoid)) {
2223
        // Direct SCO request.
2224
        if ($sco = scorm_get_sco($scoid)) {
2225
            if ($sco->launch == '') {
2226
                // Search for the next launchable sco.
2227
                if ($scoes = $DB->get_records_select(
2228
                        'scorm_scoes',
2229
                        'scorm = ? AND '.$DB->sql_isnotempty('scorm_scoes', 'launch', false, true).' AND id > ?',
2230
                        array($scorm->id, $sco->id),
2231
                        'sortorder, id')) {
2232
                    $sco = current($scoes);
2233
                }
2234
            }
2235
        }
2236
    }
2237
 
2238
    // If no sco was found get the first of SCORM package.
2239
    if (!isset($sco)) {
2240
        $scoes = $DB->get_records_select(
2241
            'scorm_scoes',
2242
            'scorm = ? AND '.$DB->sql_isnotempty('scorm_scoes', 'launch', false, true),
2243
            array($scorm->id),
2244
            'sortorder, id'
2245
        );
2246
        $sco = current($scoes);
2247
    }
2248
 
2249
    $connector = '';
2250
    $version = substr($scorm->version, 0, 4);
2251
    if ((isset($sco->parameters) && (!empty($sco->parameters))) || ($version == 'AICC')) {
2252
        if (stripos($sco->launch, '?') !== false) {
2253
            $connector = '&';
2254
        } else {
2255
            $connector = '?';
2256
        }
2257
        if ((isset($sco->parameters) && (!empty($sco->parameters))) && ($sco->parameters[0] == '?')) {
2258
            $sco->parameters = substr($sco->parameters, 1);
2259
        }
2260
    }
2261
 
2262
    if ($version == 'AICC') {
2263
        require_once("$CFG->dirroot/mod/scorm/datamodels/aicclib.php");
2264
        $aiccsid = scorm_aicc_get_hacp_session($scorm->id);
2265
        if (empty($aiccsid)) {
2266
            $aiccsid = sesskey();
2267
        }
2268
        $scoparams = '';
2269
        if (isset($sco->parameters) && (!empty($sco->parameters))) {
2270
            $scoparams = '&'. $sco->parameters;
2271
        }
2272
        $launcher = $sco->launch.$connector.'aicc_sid='.$aiccsid.'&aicc_url='.$CFG->wwwroot.'/mod/scorm/aicc.php'.$scoparams;
2273
    } else {
2274
        if (isset($sco->parameters) && (!empty($sco->parameters))) {
2275
            $launcher = $sco->launch.$connector.$sco->parameters;
2276
        } else {
2277
            $launcher = $sco->launch;
2278
        }
2279
    }
2280
 
2281
    if (scorm_external_link($sco->launch)) {
2282
        // TODO: does this happen?
2283
        $scolaunchurl = $launcher;
2284
    } else if ($scorm->scormtype === SCORM_TYPE_EXTERNAL) {
2285
        // Remote learning activity.
2286
        $scolaunchurl = dirname($scorm->reference).'/'.$launcher;
2287
    } else if ($scorm->scormtype === SCORM_TYPE_LOCAL && strtolower($scorm->reference) == 'imsmanifest.xml') {
2288
        // This SCORM content sits in a repository that allows relative links.
2289
        $scolaunchurl = "$CFG->wwwroot/pluginfile.php/$context->id/mod_scorm/imsmanifest/$scorm->revision/$launcher";
2290
    } else if ($scorm->scormtype === SCORM_TYPE_LOCAL or $scorm->scormtype === SCORM_TYPE_LOCALSYNC) {
2291
        // Note: do not convert this to use moodle_url().
2292
        // SCORM does not work without slasharguments and moodle_url() encodes querystring vars.
2293
        $scolaunchurl = "$CFG->wwwroot/pluginfile.php/$context->id/mod_scorm/content/$scorm->revision/$launcher";
2294
    }
2295
    return array($sco, $scolaunchurl);
2296
}
2297
 
2298
/**
2299
 * Trigger the scorm_launched event.
2300
 *
2301
 * @param  stdClass $scorm   scorm object
2302
 * @param  stdClass $sco     sco object
2303
 * @param  stdClass $cm      course module object
2304
 * @param  stdClass $context context object
2305
 * @param  string $scourl    SCO URL
2306
 * @since Moodle 3.1
2307
 */
2308
function scorm_launch_sco($scorm, $sco, $cm, $context, $scourl) {
2309
 
2310
    $event = \mod_scorm\event\sco_launched::create(array(
2311
        'objectid' => $sco->id,
2312
        'context' => $context,
2313
        'other' => array('instanceid' => $scorm->id, 'loadedcontent' => $scourl)
2314
    ));
2315
    $event->add_record_snapshot('course_modules', $cm);
2316
    $event->add_record_snapshot('scorm', $scorm);
2317
    $event->add_record_snapshot('scorm_scoes', $sco);
2318
    $event->trigger();
2319
}
2320
 
2321
/**
2322
 * This is really a little language parser for AICC_SCRIPT
2323
 * evaluates the expression and returns a boolean answer
2324
 * see 2.3.2.5.1. Sequencing/Navigation Today  - from the SCORM 1.2 spec (CAM).
2325
 * Also used by AICC packages.
2326
 *
2327
 * @param string $prerequisites the aicc_script prerequisites expression
2328
 * @param array  $usertracks the tracked user data of each SCO visited
2329
 * @return boolean
2330
 */
2331
function scorm_eval_prerequisites($prerequisites, $usertracks) {
2332
 
2333
    // This is really a little language parser - AICC_SCRIPT is the reference
2334
    // see 2.3.2.5.1. Sequencing/Navigation Today  - from the SCORM 1.2 spec.
2335
    $element = '';
2336
    $stack = array();
2337
    $statuses = array(
2338
        'passed' => 'passed',
2339
        'completed' => 'completed',
2340
        'failed' => 'failed',
2341
        'incomplete' => 'incomplete',
2342
        'browsed' => 'browsed',
2343
        'not attempted' => 'notattempted',
2344
        'p' => 'passed',
2345
        'c' => 'completed',
2346
        'f' => 'failed',
2347
        'i' => 'incomplete',
2348
        'b' => 'browsed',
2349
        'n' => 'notattempted'
2350
    );
2351
    $i = 0;
2352
 
2353
    // Expand the amp entities.
2354
    $prerequisites = preg_replace('/&amp;/', '&', $prerequisites);
2355
    // Find all my parsable tokens.
2356
    $prerequisites = preg_replace('/(&|\||\(|\)|\~)/', '\t$1\t', $prerequisites);
2357
    // Expand operators.
2358
    $prerequisites = preg_replace('/&/', '&&', $prerequisites);
2359
    $prerequisites = preg_replace('/\|/', '||', $prerequisites);
2360
    // Now - grab all the tokens.
2361
    $elements = explode('\t', trim($prerequisites));
2362
 
2363
    // Process each token to build an expression to be evaluated.
2364
    $stack = array();
2365
    foreach ($elements as $element) {
2366
        $element = trim($element);
2367
        if (empty($element)) {
2368
            continue;
2369
        }
2370
        if (!preg_match('/^(&&|\|\||\(|\))$/', $element)) {
2371
            // Create each individual expression.
2372
            // Search for ~ = <> X*{} .
2373
 
2374
            // Sets like 3*{S34, S36, S37, S39}.
2375
            if (preg_match('/^(\d+)\*\{(.+)\}$/', $element, $matches)) {
2376
                $repeat = $matches[1];
2377
                $set = explode(',', $matches[2]);
2378
                $count = 0;
2379
                foreach ($set as $setelement) {
2380
                    if (isset($usertracks[$setelement]) &&
2381
                        ($usertracks[$setelement]->status == 'completed' || $usertracks[$setelement]->status == 'passed')) {
2382
                        $count++;
2383
                    }
2384
                }
2385
                if ($count >= $repeat) {
2386
                    $element = 'true';
2387
                } else {
2388
                    $element = 'false';
2389
                }
2390
            } else if ($element == '~') {
2391
                // Not maps ~.
2392
                $element = '!';
2393
            } else if (preg_match('/^(.+)(\=|\<\>)(.+)$/', $element, $matches)) {
2394
                // Other symbols = | <> .
2395
                $element = trim($matches[1]);
2396
                if (isset($usertracks[$element])) {
2397
                    $value = trim(preg_replace('/(\'|\")/', '', $matches[3]));
2398
                    if (isset($statuses[$value])) {
2399
                        $value = $statuses[$value];
2400
                    }
2401
 
2402
                    $elementprerequisitematch = (strcmp($usertracks[$element]->status, $value) == 0);
2403
                    if ($matches[2] == '<>') {
2404
                        $element = $elementprerequisitematch ? 'false' : 'true';
2405
                    } else {
2406
                        $element = $elementprerequisitematch ? 'true' : 'false';
2407
                    }
2408
                } else {
2409
                    $element = 'false';
2410
                }
2411
            } else {
2412
                // Everything else must be an element defined like S45 ...
2413
                if (isset($usertracks[$element]) &&
2414
                    ($usertracks[$element]->status == 'completed' || $usertracks[$element]->status == 'passed')) {
2415
                    $element = 'true';
2416
                } else {
2417
                    $element = 'false';
2418
                }
2419
            }
2420
 
2421
        }
2422
        $stack[] = ' '.$element.' ';
2423
    }
2424
    return eval('return '.implode($stack).';');
2425
}
2426
 
2427
/**
2428
 * Update the calendar entries for this scorm activity.
2429
 *
2430
 * @param stdClass $scorm the row from the database table scorm.
2431
 * @param int $cmid The coursemodule id
2432
 * @return bool
2433
 */
2434
function scorm_update_calendar(stdClass $scorm, $cmid) {
2435
    global $DB, $CFG;
2436
 
2437
    require_once($CFG->dirroot.'/calendar/lib.php');
2438
 
2439
    // Scorm start calendar events.
2440
    $event = new stdClass();
2441
    $event->eventtype = SCORM_EVENT_TYPE_OPEN;
2442
    // The SCORM_EVENT_TYPE_OPEN event should only be an action event if no close time is specified.
2443
    $event->type = empty($scorm->timeclose) ? CALENDAR_EVENT_TYPE_ACTION : CALENDAR_EVENT_TYPE_STANDARD;
2444
    if ($event->id = $DB->get_field('event', 'id',
2445
        array('modulename' => 'scorm', 'instance' => $scorm->id, 'eventtype' => $event->eventtype))) {
2446
        if ((!empty($scorm->timeopen)) && ($scorm->timeopen > 0)) {
2447
            // Calendar event exists so update it.
2448
            $event->name = get_string('calendarstart', 'scorm', $scorm->name);
2449
            $event->description = format_module_intro('scorm', $scorm, $cmid, false);
2450
            $event->format = FORMAT_HTML;
2451
            $event->timestart = $scorm->timeopen;
2452
            $event->timesort = $scorm->timeopen;
2453
            $event->visible = instance_is_visible('scorm', $scorm);
2454
            $event->timeduration = 0;
2455
 
2456
            $calendarevent = calendar_event::load($event->id);
2457
            $calendarevent->update($event, false);
2458
        } else {
2459
            // Calendar event is on longer needed.
2460
            $calendarevent = calendar_event::load($event->id);
2461
            $calendarevent->delete();
2462
        }
2463
    } else {
2464
        // Event doesn't exist so create one.
2465
        if ((!empty($scorm->timeopen)) && ($scorm->timeopen > 0)) {
2466
            $event->name = get_string('calendarstart', 'scorm', $scorm->name);
2467
            $event->description = format_module_intro('scorm', $scorm, $cmid, false);
2468
            $event->format = FORMAT_HTML;
2469
            $event->courseid = $scorm->course;
2470
            $event->groupid = 0;
2471
            $event->userid = 0;
2472
            $event->modulename = 'scorm';
2473
            $event->instance = $scorm->id;
2474
            $event->timestart = $scorm->timeopen;
2475
            $event->timesort = $scorm->timeopen;
2476
            $event->visible = instance_is_visible('scorm', $scorm);
2477
            $event->timeduration = 0;
2478
 
2479
            calendar_event::create($event, false);
2480
        }
2481
    }
2482
 
2483
    // Scorm end calendar events.
2484
    $event = new stdClass();
2485
    $event->type = CALENDAR_EVENT_TYPE_ACTION;
2486
    $event->eventtype = SCORM_EVENT_TYPE_CLOSE;
2487
    if ($event->id = $DB->get_field('event', 'id',
2488
        array('modulename' => 'scorm', 'instance' => $scorm->id, 'eventtype' => $event->eventtype))) {
2489
        if ((!empty($scorm->timeclose)) && ($scorm->timeclose > 0)) {
2490
            // Calendar event exists so update it.
2491
            $event->name = get_string('calendarend', 'scorm', $scorm->name);
2492
            $event->description = format_module_intro('scorm', $scorm, $cmid, false);
2493
            $event->format = FORMAT_HTML;
2494
            $event->timestart = $scorm->timeclose;
2495
            $event->timesort = $scorm->timeclose;
2496
            $event->visible = instance_is_visible('scorm', $scorm);
2497
            $event->timeduration = 0;
2498
 
2499
            $calendarevent = calendar_event::load($event->id);
2500
            $calendarevent->update($event, false);
2501
        } else {
2502
            // Calendar event is on longer needed.
2503
            $calendarevent = calendar_event::load($event->id);
2504
            $calendarevent->delete();
2505
        }
2506
    } else {
2507
        // Event doesn't exist so create one.
2508
        if ((!empty($scorm->timeclose)) && ($scorm->timeclose > 0)) {
2509
            $event->name = get_string('calendarend', 'scorm', $scorm->name);
2510
            $event->description = format_module_intro('scorm', $scorm, $cmid, false);
2511
            $event->format = FORMAT_HTML;
2512
            $event->courseid = $scorm->course;
2513
            $event->groupid = 0;
2514
            $event->userid = 0;
2515
            $event->modulename = 'scorm';
2516
            $event->instance = $scorm->id;
2517
            $event->timestart = $scorm->timeclose;
2518
            $event->timesort = $scorm->timeclose;
2519
            $event->visible = instance_is_visible('scorm', $scorm);
2520
            $event->timeduration = 0;
2521
 
2522
            calendar_event::create($event, false);
2523
        }
2524
    }
2525
}
2526
 
2527
/**
2528
 * Function to delete user tracks from tables.
2529
 *
2530
 * @param int $scormid - id from scorm.
2531
 * @param int $scoid - id of sco that needs to be deleted.
2532
 * @param int $userid - userid that needs to be deleted.
2533
 * @param int $attemptid - attemptid that should be deleted.
2534
 * @since Moodle 4.3
2535
 */
2536
function scorm_delete_tracks($scormid, $scoid = null, $userid = null, $attemptid = null) {
2537
    global $DB;
2538
 
2539
    $usersql = '';
2540
    $params = ['scormid' => $scormid];
2541
    if (!empty($attemptid)) {
2542
        $params['attemptid'] = $attemptid;
2543
        $sql = "attemptid = :attemptid";
2544
    } else {
2545
        if (!empty($userid)) {
2546
            $usersql = ' AND userid = :userid';
2547
            $params['userid'] = $userid;
2548
        }
2549
        $sql = "attemptid in (SELECT id FROM {scorm_attempt} WHERE scormid = :scormid $usersql)";
2550
    }
2551
 
2552
    if (!empty($scoid)) {
2553
        $params['scoid'] = $scoid;
2554
        $sql .= " AND scoid = :scoid";
2555
    }
2556
    $DB->delete_records_select('scorm_scoes_value', $sql, $params);
2557
 
2558
    if (empty($scoid)) {
2559
        if (empty($attemptid)) {
2560
            // Scoid is empty so we delete the attempt as well.
2561
            $DB->delete_records('scorm_attempt', $params);
2562
        } else {
2563
            $DB->delete_records('scorm_attempt', ['id' => $attemptid]);
2564
        }
2565
    }
2566
}
2567
 
2568
/**
2569
 * Get specific scorm track data.
2570
 * Note: the $attempt var is optional as SCORM 2004 code doesn't always use it, probably a bug,
2571
 * but we do not want to change SCORM 2004 behaviour right now.
2572
 *
2573
 * @param int $scoid - scoid.
2574
 * @param int $userid - user id of user.
2575
 * @param string $element - name of element being requested.
2576
 * @param int $attempt - attempt number (not id)
2577
 * @since Moodle 4.3
2578
 * @return mixed
2579
 */
2580
function scorm_get_sco_value($scoid, $userid, $element, $attempt = null): ?stdClass {
2581
    global $DB;
2582
    $params = ['scoid' => $scoid, 'userid' => $userid, 'element' => $element];
2583
 
2584
    $sql = "SELECT a.id, a.userid, a.scormid, a.attempt, v.id as valueid, v.scoid, v.value, v.timemodified, e.element
2585
              FROM {scorm_attempt} a
2586
              JOIN {scorm_scoes_value} v ON v.attemptid = a.id
2587
              JOIN {scorm_element} e on e.id = v.elementid
2588
              WHERE v.scoid = :scoid AND a.userid = :userid AND e.element = :element";
2589
 
2590
    if ($attempt !== null) {
2591
        $params['attempt'] = $attempt;
2592
        $sql .= " AND a.attempt = :attempt";
2593
    }
2594
    $value = $DB->get_record_sql($sql, $params);
2595
    return $value ?: null;
2596
}
2597
 
2598
/**
2599
 * Get attempt record, allow one to be created if doesn't exist.
2600
 *
2601
 * @param int $userid - user id.
2602
 * @param int $scormid - SCORM id.
2603
 * @param int $attempt - attempt number.
2604
 * @param boolean $create - should an attempt record be created if it does not exist.
2605
 * @since Moodle 4.3
2606
 * @return stdclass
2607
 */
2608
function scorm_get_attempt($userid, $scormid, $attempt, $create = true): ?stdClass {
2609
    global $DB;
2610
    $params = ['scormid' => $scormid, 'userid' => $userid, 'attempt' => $attempt];
2611
    $attemptobject = $DB->get_record('scorm_attempt', $params);
2612
    if (empty($attemptobject) && $create) {
2613
        // Create new attempt.
2614
        $attemptobject = new stdClass();
2615
        $attemptobject->userid = $userid;
2616
        $attemptobject->attempt = $attempt;
2617
        $attemptobject->scormid = $scormid;
2618
        $attemptobject->id = $DB->insert_record('scorm_attempt', $attemptobject);
2619
    }
2620
    return $attemptobject ?: null;
2621
}
2622
 
2623
/**
2624
 * Get Scorm element id from cache, allow one to be created if doesn't exist.
2625
 *
2626
 * @param string $elementname - name of element that is being requested.
2627
 * @since Moodle 4.3
2628
 * @return int - element id.
2629
 */
2630
function scorm_get_elementid($elementname): ?int {
2631
    global $DB;
2632
    $cache = cache::make('mod_scorm', 'elements');
2633
    $element = $cache->get($elementname);
2634
    if (empty($element)) {
2635
        // Create new attempt.
2636
        $element = new stdClass();
2637
        $element->element = $elementname;
2638
        $elementid = $DB->insert_record('scorm_element', $element);
2639
        $cache->set($elementname, $elementid);
2640
        return $elementid;
2641
    } else {
2642
        return $element;
2643
    }
2644
}