mod/scorm/locallib.php

   1 <?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 require_once("$CFG->dirroot/mod/scorm/lib.php");
  18 require_once("$CFG->libdir/filelib.php");
  19
  20 /// Constants and settings for module scorm
  21 define('SCORM_UPDATE_NEVER', '0');
  22 define('SCORM_UPDATE_EVERYDAY', '2');
  23 define('SCORM_UPDATE_EVERYTIME', '3');
  24
  25 define('SCORM_SKIPVIEW_NEVER', '0');
  26 define('SCORM_SKIPVIEW_FIRST', '1');
  27 define('SCORM_SKIPVIEW_ALWAYS', '2');
  28
  29 define('SCO_ALL', 0);
  30 define('SCO_DATA', 1);
  31 define('SCO_ONLY', 2);
  32
  33 define('GRADESCOES', '0');
  34 define('GRADEHIGHEST', '1');
  35 define('GRADEAVERAGE', '2');
  36 define('GRADESUM', '3');
  37
  38 define('HIGHESTATTEMPT', '0');
  39 define('AVERAGEATTEMPT', '1');
  40 define('FIRSTATTEMPT', '2');
  41 define('LASTATTEMPT', '3');
  42
  43 define('TOCJSLINK', 1);
  44 define('TOCFULLURL', 2);
  45
  46 /// Local Library of functions for module scorm
  47
  48 /**
  49  * @package   mod-scorm
  50  * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
  51  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  52  */
  53 class scorm_package_file_info extends file_info_stored {
  54     public function get_parent() {
  55         if ($this->lf->get_filepath() === '/' and $this->lf->get_filename() === '.') {
  56             return $this->browser->get_file_info($this->context);
  57         }
  58         return parent::get_parent();
  59     }
  60     public function get_visible_name() {
  61         if ($this->lf->get_filepath() === '/' and $this->lf->get_filename() === '.') {
  62             return $this->topvisiblename;
  63         }
  64         return parent::get_visible_name();
  65     }
  66 }
  67
  68 /**
  69  * Returns an array of the popup options for SCORM and each options default value
  70  *
  71  * @return array an array of popup options as the key and their defaults as the value
  72  */
  73 function scorm_get_popup_options_array() {
  74     $cfgscorm = get_config('scorm');
  75
  76     return array('scrollbars'=> isset($cfgscorm->scrollbars) ? $cfgscorm->scrollbars : 0,
  77                  'directories'=> isset($cfgscorm->directories) ? $cfgscorm->directories : 0,
  78                  'location'=> isset($cfgscorm->location) ? $cfgscorm->location : 0,
  79                  'menubar'=> isset($cfgscorm->menubar) ? $cfgscorm->menubar : 0,
  80                  'toolbar'=> isset($cfgscorm->toolbar) ? $cfgscorm->toolbar : 0,
  81                  'status'=> isset($cfgscorm->status) ? $cfgscorm->status : 0);
  82 }
  83
  84 /**
  85  * Returns an array of the array of what grade options
  86  *
  87  * @return array an array of what grade options
  88  */
  89 function scorm_get_grade_method_array() {
  90     return array (GRADESCOES => get_string('gradescoes', 'scorm'),
  91                   GRADEHIGHEST => get_string('gradehighest', 'scorm'),
  92                   GRADEAVERAGE => get_string('gradeaverage', 'scorm'),
  93                   GRADESUM => get_string('gradesum', 'scorm'));
  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_what_grade_array() {
 102     return array (HIGHESTATTEMPT => get_string('highestattempt', 'scorm'),
 103                   AVERAGEATTEMPT => get_string('averageattempt', 'scorm'),
 104                   FIRSTATTEMPT => get_string('firstattempt', 'scorm'),
 105                   LASTATTEMPT => get_string('lastattempt', 'scorm'));
 106 }
 107
 108 /**
 109  * Returns an array of the array of skip view options
 110  *
 111  * @return array an array of skip view options
 112  */
 113 function scorm_get_skip_view_array() {
 114     return array(SCORM_SKIPVIEW_NEVER => get_string('never'),
 115                  SCORM_SKIPVIEW_FIRST => get_string('firstaccess', 'scorm'),
 116                  SCORM_SKIPVIEW_ALWAYS => get_string('always'));
 117 }
 118
 119 /**
 120  * Returns an array of the array of hide table of contents options
 121  *
 122  * @return array an array of hide table of contents options
 123  */
 124 function scorm_get_hidetoc_array() {
 125      return array(SCORM_TOC_SIDE => get_string('sided', 'scorm'),
 126                   SCORM_TOC_HIDDEN => get_string('hidden', 'scorm'),
 127                   SCORM_TOC_POPUP => get_string('popupmenu', 'scorm'),
 128                   SCORM_TOC_DISABLED => get_string('disabled', 'scorm'));
 129 }
 130
 131 /**
 132  * Returns an array of the array of update frequency options
 133  *
 134  * @return array an array of update frequency options
 135  */
 136 function scorm_get_updatefreq_array() {
 137     return array(SCORM_UPDATE_NEVER => get_string('never'),
 138                  SCORM_UPDATE_EVERYDAY => get_string('everyday', 'scorm'),
 139                  SCORM_UPDATE_EVERYTIME => get_string('everytime', 'scorm'));
 140 }
 141
 142 /**
 143  * Returns an array of the array of popup display options
 144  *
 145  * @return array an array of popup display options
 146  */
 147 function scorm_get_popup_display_array() {
 148     return array(0 => get_string('currentwindow', 'scorm'),
 149                  1 => get_string('popup', 'scorm'));
 150 }
 151
 152 /**
 153  * Returns an array of the array of navigation buttons display options
 154  *
 155  * @return array an array of navigation buttons display options
 156  */
 157 function scorm_get_navigation_display_array() {
 158     return array(SCORM_NAV_DISABLED => get_string('no'),
 159                  SCORM_NAV_UNDER_CONTENT => get_string('undercontent', 'scorm'),
 160                  SCORM_NAV_FLOATING => get_string('floating', 'scorm'));
 161 }
 162
 163 /**
 164  * Returns an array of the array of attempt options
 165  *
 166  * @return array an array of attempt options
 167  */
 168 function scorm_get_attempts_array() {
 169     $attempts = array(0 => get_string('nolimit', 'scorm'),
 170                       1 => get_string('attempt1', 'scorm'));
 171
 172     for ($i=2; $i<=6; $i++) {
 173         $attempts[$i] = get_string('attemptsx', 'scorm', $i);
 174     }
 175
 176     return $attempts;
 177 }
 178
 179 /**
 180  * Returns an array of the attempt status options
 181  *
 182  * @return array an array of attempt status options
 183  */
 184 function scorm_get_attemptstatus_array() {
 185     return array(SCORM_DISPLAY_ATTEMPTSTATUS_NO => get_string('no'),
 186                  SCORM_DISPLAY_ATTEMPTSTATUS_ALL => get_string('attemptstatusall', 'scorm'),
 187                  SCORM_DISPLAY_ATTEMPTSTATUS_MY => get_string('attemptstatusmy', 'scorm'),
 188                  SCORM_DISPLAY_ATTEMPTSTATUS_ENTRY => get_string('attemptstatusentry', 'scorm'));
 189 }
 190
 191 /**
 192  * Extracts scrom package, sets up all variables.
 193  * Called whenever scorm changes
 194  * @param object $scorm instance - fields are updated and changes saved into database
 195  * @param bool $full force full update if true
 196  * @return void
 197  */
 198 function scorm_parse($scorm, $full) {
 199     global $CFG, $DB;
 200     $cfg_scorm = get_config('scorm');
 201
 202     if (!isset($scorm->cmid)) {
 203         $cm = get_coursemodule_from_instance('scorm', $scorm->id);
 204         $scorm->cmid = $cm->id;
 205     }
 206     $context = context_module::instance($scorm->cmid);
 207     $newhash = $scorm->sha1hash;
 208
 209     if ($scorm->scormtype === SCORM_TYPE_LOCAL or $scorm->scormtype === SCORM_TYPE_LOCALSYNC) {
 210
 211         $fs = get_file_storage();
 212         $packagefile = false;
 213         $packagefileimsmanifest = false;
 214
 215         if ($scorm->scormtype === SCORM_TYPE_LOCAL) {
 216             if ($packagefile = $fs->get_file($context->id, 'mod_scorm', 'package', 0, '/', $scorm->reference)) {
 217                 if ($packagefile->is_external_file()) { // Get zip file so we can check it is correct.
 218                     $packagefile->import_external_file_contents();
 219                 }
 220                 $newhash = $packagefile->get_contenthash();
 221                 if (strtolower($packagefile->get_filename()) == 'imsmanifest.xml') {
 222                     $packagefileimsmanifest = true;
 223                 }
 224             } else {
 225                 $newhash = null;
 226             }
 227         } else {
 228             if (!$cfg_scorm->allowtypelocalsync) {
 229                 // sorry - localsync disabled
 230                 return;
 231             }
 232             if ($scorm->reference !== '' and (!$full or $scorm->sha1hash !== sha1($scorm->reference))) {
 233                 $fs->delete_area_files($context->id, 'mod_scorm', 'package');
 234                 $file_record = array('contextid'=>$context->id, 'component'=>'mod_scorm', 'filearea'=>'package', 'itemid'=>0, 'filepath'=>'/');
 235                 if ($packagefile = $fs->create_file_from_url($file_record, $scorm->reference, array('calctimeout' => true))) {
 236                     $newhash = sha1($scorm->reference);
 237                 } else {
 238                     $newhash = null;
 239                 }
 240             }
 241         }
 242
 243         if ($packagefile) {
 244             if (!$full and $packagefile and $scorm->sha1hash === $newhash) {
 245                 if (strpos($scorm->version, 'SCORM') !== false) {
 246                     if ($packagefileimsmanifest || $fs->get_file($context->id, 'mod_scorm', 'content', 0, '/', 'imsmanifest.xml')) {
 247                         // No need to update.
 248                         return;
 249                     }
 250                 } else if (strpos($scorm->version, 'AICC') !== false) {
 251                     // TODO: add more sanity checks - something really exists in scorm_content area
 252                     return;
 253                 }
 254             }
 255             if (!$packagefileimsmanifest) {
 256                 // Now extract files.
 257                 $fs->delete_area_files($context->id, 'mod_scorm', 'content');
 258
 259                 $packer = get_file_packer('application/zip');
 260                 $packagefile->extract_to_storage($packer, $context->id, 'mod_scorm', 'content', 0, '/');
 261             }
 262
 263         } else if (!$full) {
 264             return;
 265         }
 266         if ($packagefileimsmanifest) {
 267             require_once("$CFG->dirroot/mod/scorm/datamodels/scormlib.php");
 268             // Direct link to imsmanifest.xml file.
 269             if (!scorm_parse_scorm($scorm, $packagefile)) {
 270                 $scorm->version = 'ERROR';
 271             }
 272
 273         } else if ($manifest = $fs->get_file($context->id, 'mod_scorm', 'content', 0, '/', 'imsmanifest.xml')) {
 274             require_once("$CFG->dirroot/mod/scorm/datamodels/scormlib.php");
 275             // SCORM
 276             if (!scorm_parse_scorm($scorm, $manifest)) {
 277                 $scorm->version = 'ERROR';
 278             }
 279         } else {
 280             require_once("$CFG->dirroot/mod/scorm/datamodels/aicclib.php");
 281             // AICC
 282             if (!scorm_parse_aicc($scorm)) {
 283                 $scorm->version = 'ERROR';
 284             }
 285             $scorm->version = 'AICC';
 286         }
 287
 288     } else if ($scorm->scormtype === SCORM_TYPE_EXTERNAL and $cfg_scorm->allowtypeexternal) {
 289         require_once("$CFG->dirroot/mod/scorm/datamodels/scormlib.php");
 290         // SCORM only, AICC can not be external
 291         if (!scorm_parse_scorm($scorm, $scorm->reference)) {
 292             $scorm->version = 'ERROR';
 293         }
 294         $newhash = sha1($scorm->reference);
 295
 296     } else if ($scorm->scormtype === SCORM_TYPE_AICCURL  and $cfg_scorm->allowtypeexternalaicc) {
 297         require_once("$CFG->dirroot/mod/scorm/datamodels/aicclib.php");
 298         // AICC
 299         if (!scorm_parse_aicc($scorm)) {
 300             $scorm->version = 'ERROR';
 301         }
 302         $scorm->version = 'AICC';
 303     } else {
 304         // sorry, disabled type
 305         return;
 306     }
 307
 308     $scorm->revision++;
 309     $scorm->sha1hash = $newhash;
 310     $DB->update_record('scorm', $scorm);
 311 }
 312
 313
 314 function scorm_array_search($item, $needle, $haystacks, $strict=false) {
 315     if (!empty($haystacks)) {
 316         foreach ($haystacks as $key => $element) {
 317             if ($strict) {
 318                 if ($element->{$item} === $needle) {
 319                     return $key;
 320                 }
 321             } else {
 322                 if ($element->{$item} == $needle) {
 323                     return $key;
 324                 }
 325             }
 326         }
 327     }
 328     return false;
 329 }
 330
 331 function scorm_repeater($what, $times) {
 332     if ($times <= 0) {
 333         return null;
 334     }
 335     $return = '';
 336     for ($i=0; $i<$times; $i++) {
 337         $return .= $what;
 338     }
 339     return $return;
 340 }
 341
 342 function scorm_external_link($link) {
 343     // check if a link is external
 344     $result = false;
 345     $link = strtolower($link);
 346     if (substr($link, 0, 7) == 'http://') {
 347         $result = true;
 348     } else if (substr($link, 0, 8) == 'https://') {
 349         $result = true;
 350     } else if (substr($link, 0, 4) == 'www.') {
 351         $result = true;
 352     }
 353     return $result;
 354 }
 355
 356 /**
 357  * Returns an object containing all datas relative to the given sco ID
 358  *
 359  * @param integer $id The sco ID
 360  * @return mixed (false if sco id does not exists)
 361  */
 362 function scorm_get_sco($id, $what=SCO_ALL) {
 363     global $DB;
 364
 365     if ($sco = $DB->get_record('scorm_scoes', array('id'=>$id))) {
 366         $sco = ($what == SCO_DATA) ? new stdClass() : $sco;
 367         if (($what != SCO_ONLY) && ($scodatas = $DB->get_records('scorm_scoes_data', array('scoid'=>$id)))) {
 368             foreach ($scodatas as $scodata) {
 369                 $sco->{$scodata->name} = $scodata->value;
 370             }
 371         } else if (($what != SCO_ONLY) && (!($scodatas = $DB->get_records('scorm_scoes_data', array('scoid'=>$id))))) {
 372             $sco->parameters = '';
 373         }
 374         return $sco;
 375     } else {
 376         return false;
 377     }
 378 }
 379
 380 /**
 381  * Returns an object (array) containing all the scoes data related to the given sco ID
 382  *
 383  * @param integer $id The sco ID
 384  * @param integer $organisation an organisation ID - defaults to false if not required
 385  * @return mixed (false if there are no scoes or an array)
 386  */
 387 function scorm_get_scoes($id, $organisation=false) {
 388     global $DB;
 389
 390     $queryarray = array('scorm'=>$id);
 391     if (!empty($organisation)) {
 392         $queryarray['organization'] = $organisation;
 393     }
 394     if ($scoes = $DB->get_records('scorm_scoes', $queryarray, 'sortorder, id')) {
 395         // Drop keys so that it is a simple array as expected.
 396         $scoes = array_values($scoes);
 397         foreach ($scoes as $sco) {
 398             if ($scodatas = $DB->get_records('scorm_scoes_data', array('scoid'=>$sco->id))) {
 399                 foreach ($scodatas as $scodata) {
 400                     $sco->{$scodata->name} = $scodata->value;
 401                 }
 402             }
 403         }
 404         return $scoes;
 405     } else {
 406         return false;
 407     }
 408 }
 409
 410 function scorm_insert_track($userid, $scormid, $scoid, $attempt, $element, $value, $forcecompleted=false) {
 411     global $DB, $CFG;
 412
 413     $id = null;
 414
 415     if ($forcecompleted) {
 416         //TODO - this could be broadened to encompass SCORM 2004 in future
 417         if (($element == 'cmi.core.lesson_status') && ($value == 'incomplete')) {
 418             if ($track = $DB->get_record_select('scorm_scoes_track', 'userid=? AND scormid=? AND scoid=? AND attempt=? AND element=\'cmi.core.score.raw\'', array($userid, $scormid, $scoid, $attempt))) {
 419                 $value = 'completed';
 420             }
 421         }
 422         if ($element == 'cmi.core.score.raw') {
 423             if ($tracktest = $DB->get_record_select('scorm_scoes_track', 'userid=? AND scormid=? AND scoid=? AND attempt=? AND element=\'cmi.core.lesson_status\'', array($userid, $scormid, $scoid, $attempt))) {
 424                 if ($tracktest->value == "incomplete") {
 425                     $tracktest->value = "completed";
 426                     $DB->update_record('scorm_scoes_track', $tracktest);
 427                 }
 428             }
 429         }
 430         if (($element == 'cmi.success_status') && ($value == 'passed' || $value == 'failed')) {
 431             if ($DB->get_record('scorm_scoes_data', array('scoid' => $scoid, 'name' => 'objectivesetbycontent'))) {
 432                 $objectiveprogressstatus = true;
 433                 $objectivesatisfiedstatus = false;
 434                 if ($value == 'passed') {
 435                     $objectivesatisfiedstatus = true;
 436                 }
 437
 438                 if ($track = $DB->get_record('scorm_scoes_track', array('userid' => $userid,
 439                                                                         'scormid' => $scormid,
 440                                                                         'scoid' => $scoid,
 441                                                                         'attempt' => $attempt,
 442                                                                         'element' => 'objectiveprogressstatus'))) {
 443                     $track->value = $objectiveprogressstatus;
 444                     $track->timemodified = time();
 445                     $DB->update_record('scorm_scoes_track', $track);
 446                     $id = $track->id;
 447                 } else {
 448                     $track = new stdClass();
 449                     $track->userid = $userid;
 450                     $track->scormid = $scormid;
 451                     $track->scoid = $scoid;
 452                     $track->attempt = $attempt;
 453                     $track->element = 'objectiveprogressstatus';
 454                     $track->value = $objectiveprogressstatus;
 455                     $track->timemodified = time();
 456                     $id = $DB->insert_record('scorm_scoes_track', $track);
 457                 }
 458                 if ($objectivesatisfiedstatus) {
 459                     if ($track = $DB->get_record('scorm_scoes_track', array('userid' => $userid,
 460                                                                             'scormid' => $scormid,
 461                                                                             'scoid' => $scoid,
 462                                                                             'attempt' => $attempt,
 463                                                                             'element' => 'objectivesatisfiedstatus'))) {
 464                         $track->value = $objectivesatisfiedstatus;
 465                         $track->timemodified = time();
 466                         $DB->update_record('scorm_scoes_track', $track);
 467                         $id = $track->id;
 468                     } else {
 469                         $track = new stdClass();
 470                         $track->userid = $userid;
 471                         $track->scormid = $scormid;
 472                         $track->scoid = $scoid;
 473                         $track->attempt = $attempt;
 474                         $track->element = 'objectivesatisfiedstatus';
 475                         $track->value = $objectivesatisfiedstatus;
 476                         $track->timemodified = time();
 477                         $id = $DB->insert_record('scorm_scoes_track', $track);
 478                         ob_start();
 479                         $filepath = $CFG->dataroot."\\temp\\tempfile.txt";
 480                         $fh = fopen($filepath, "a+");
 481                         var_dump($track);
 482                         $string = ob_get_clean();
 483                         fwrite($fh, $string);
 484                         fclose($fh);
 485                     }
 486                 }
 487             }
 488         }
 489
 490     }
 491
 492     if ($track = $DB->get_record('scorm_scoes_track', array('userid' => $userid,
 493                                                             'scormid' => $scormid,
 494                                                             'scoid' => $scoid,
 495                                                             'attempt' => $attempt,
 496                                                             'element' => $element))) {
 497         if ($element != 'x.start.time' ) { // Don't update x.start.time - keep the original value.
 498             $track->value = $value;
 499             $track->timemodified = time();
 500             $DB->update_record('scorm_scoes_track', $track);
 501             $id = $track->id;
 502         }
 503     } else {
 504         $track = new stdClass();
 505         $track->userid = $userid;
 506         $track->scormid = $scormid;
 507         $track->scoid = $scoid;
 508         $track->attempt = $attempt;
 509         $track->element = $element;
 510         $track->value = $value;
 511         $track->timemodified = time();
 512         $id = $DB->insert_record('scorm_scoes_track', $track);
 513     }
 514
 515     if (strstr($element, '.score.raw') ||
 516         (in_array($element, array('cmi.completion_status', 'cmi.core.lesson_status', 'cmi.success_status'))
 517          && in_array($track->value, array('completed', 'passed')))) {
 518         $scorm = $DB->get_record('scorm', array('id' => $scormid));
 519         include_once($CFG->dirroot.'/mod/scorm/lib.php');
 520         scorm_update_grades($scorm, $userid);
 521     }
 522
 523     return $id;
 524 }
 525
 526 /**
 527  * simple quick function to return true/false if this user has tracks in this scorm
 528  *
 529  * @param integer $scormid The scorm ID
 530  * @param integer $userid the users id
 531  * @return boolean (false if there are no tracks)
 532  */
 533 function scorm_has_tracks($scormid, $userid) {
 534     global $DB;
 535     return $DB->record_exists('scorm_scoes_track', array('userid' => $userid, 'scormid' => $scormid));
 536 }
 537
 538 function scorm_get_tracks($scoid, $userid, $attempt='') {
 539     // Gets all tracks of specified sco and user.
 540     global $DB;
 541
 542     if (empty($attempt)) {
 543         if ($scormid = $DB->get_field('scorm_scoes', 'scorm', array('id'=>$scoid))) {
 544             $attempt = scorm_get_last_attempt($scormid, $userid);
 545         } else {
 546             $attempt = 1;
 547         }
 548     }
 549     if ($tracks = $DB->get_records('scorm_scoes_track', array('userid'=>$userid, 'scoid'=>$scoid,
 550                                                               'attempt'=>$attempt), 'element ASC')) {
 551         $usertrack = scorm_format_interactions($tracks);
 552         $usertrack->userid = $userid;
 553         $usertrack->scoid = $scoid;
 554
 555         return $usertrack;
 556     } else {
 557         return false;
 558     }
 559 }
 560 /**
 561  * helper function to return a formatted list of interactions for reports.
 562  *
 563  * @param array $trackdata the records from scorm_scoes_track table
 564  * @return object formatted list of interactions
 565  */
 566 function scorm_format_interactions($trackdata) {
 567     $usertrack = new stdClass();
 568
 569     // Defined in order to unify scorm1.2 and scorm2004.
 570     $usertrack->score_raw = '';
 571     $usertrack->status = '';
 572     $usertrack->total_time = '00:00:00';
 573     $usertrack->session_time = '00:00:00';
 574     $usertrack->timemodified = 0;
 575
 576     foreach ($trackdata as $track) {
 577         $element = $track->element;
 578         $usertrack->{$element} = $track->value;
 579         switch ($element) {
 580             case 'cmi.core.lesson_status':
 581             case 'cmi.completion_status':
 582                 if ($track->value == 'not attempted') {
 583                     $track->value = 'notattempted';
 584                 }
 585                 $usertrack->status = $track->value;
 586                 break;
 587             case 'cmi.core.score.raw':
 588             case 'cmi.score.raw':
 589                 $usertrack->score_raw = (float) sprintf('%2.2f', $track->value);
 590                 break;
 591             case 'cmi.core.session_time':
 592             case 'cmi.session_time':
 593                 $usertrack->session_time = $track->value;
 594                 break;
 595             case 'cmi.core.total_time':
 596             case 'cmi.total_time':
 597                 $usertrack->total_time = $track->value;
 598                 break;
 599         }
 600         if (isset($track->timemodified) && ($track->timemodified > $usertrack->timemodified)) {
 601             $usertrack->timemodified = $track->timemodified;
 602         }
 603     }
 604
 605     return $usertrack;
 606 }
 607 /* Find the start and finsh time for a a given SCO attempt
 608  *
 609  * @param int $scormid SCORM Id
 610  * @param int $scoid SCO Id
 611  * @param int $userid User Id
 612  * @param int $attemt Attempt Id
 613  *
 614  * @return object start and finsh time EPOC secods
 615  *
 616  */
 617 function scorm_get_sco_runtime($scormid, $scoid, $userid, $attempt=1) {
 618     global $DB;
 619
 620     $timedata = new stdClass();
 621     $sql = !empty($scoid) ? "userid=$userid AND scormid=$scormid AND scoid=$scoid AND attempt=$attempt" : "userid=$userid AND scormid=$scormid AND attempt=$attempt";
 622     $tracks = $DB->get_records_select('scorm_scoes_track', "$sql ORDER BY timemodified ASC");
 623     if ($tracks) {
 624         $tracks = array_values($tracks);
 625     }
 626
 627     if ($tracks) {
 628         $timedata->start = $tracks[0]->timemodified;
 629     } else {
 630         $timedata->start = false;
 631     }
 632     if ($tracks && $track = array_pop($tracks)) {
 633         $timedata->finish = $track->timemodified;
 634     } else {
 635         $timedata->finish = $timedata->start;
 636     }
 637     return $timedata;
 638 }
 639
 640 function scorm_grade_user_attempt($scorm, $userid, $attempt=1) {
 641     global $DB;
 642     $attemptscore = new stdClass();
 643     $attemptscore->scoes = 0;
 644     $attemptscore->values = 0;
 645     $attemptscore->max = 0;
 646     $attemptscore->sum = 0;
 647     $attemptscore->lastmodify = 0;
 648
 649     if (!$scoes = $DB->get_records('scorm_scoes', array('scorm' => $scorm->id), 'sortorder, id')) {
 650         return null;
 651     }
 652
 653     foreach ($scoes as $sco) {
 654         if ($userdata=scorm_get_tracks($sco->id, $userid, $attempt)) {
 655             if (($userdata->status == 'completed') || ($userdata->status == 'passed')) {
 656                 $attemptscore->scoes++;
 657             }
 658             if (!empty($userdata->score_raw) || (isset($scorm->type) && $scorm->type=='sco' && isset($userdata->score_raw))) {
 659                 $attemptscore->values++;
 660                 $attemptscore->sum += $userdata->score_raw;
 661                 $attemptscore->max = ($userdata->score_raw > $attemptscore->max)?$userdata->score_raw:$attemptscore->max;
 662                 if (isset($userdata->timemodified) && ($userdata->timemodified > $attemptscore->lastmodify)) {
 663                     $attemptscore->lastmodify = $userdata->timemodified;
 664                 } else {
 665                     $attemptscore->lastmodify = 0;
 666                 }
 667             }
 668         }
 669     }
 670     switch ($scorm->grademethod) {
 671         case GRADEHIGHEST:
 672             $score = (float) $attemptscore->max;
 673         break;
 674         case GRADEAVERAGE:
 675             if ($attemptscore->values > 0) {
 676                 $score = $attemptscore->sum/$attemptscore->values;
 677             } else {
 678                 $score = 0;
 679             }
 680         break;
 681         case GRADESUM:
 682             $score = $attemptscore->sum;
 683         break;
 684         case GRADESCOES:
 685             $score = $attemptscore->scoes;
 686         break;
 687         default:
 688             $score = $attemptscore->max;   // Remote Learner GRADEHIGHEST is default
 689     }
 690
 691     return $score;
 692 }
 693
 694 function scorm_grade_user($scorm, $userid) {
 695
 696     // ensure we dont grade user beyond $scorm->maxattempt settings
 697     $lastattempt = scorm_get_last_attempt($scorm->id, $userid);
 698     if ($scorm->maxattempt != 0 && $lastattempt >= $scorm->maxattempt) {
 699         $lastattempt = $scorm->maxattempt;
 700     }
 701
 702     switch ($scorm->whatgrade) {
 703         case FIRSTATTEMPT:
 704             return scorm_grade_user_attempt($scorm, $userid, 1);
 705         break;
 706         case LASTATTEMPT:
 707             return scorm_grade_user_attempt($scorm, $userid, scorm_get_last_completed_attempt($scorm->id, $userid));
 708         break;
 709         case HIGHESTATTEMPT:
 710             $maxscore = 0;
 711             for ($attempt = 1; $attempt <= $lastattempt; $attempt++) {
 712                 $attemptscore = scorm_grade_user_attempt($scorm, $userid, $attempt);
 713                 $maxscore = $attemptscore > $maxscore ? $attemptscore: $maxscore;
 714             }
 715             return $maxscore;
 716
 717         break;
 718         case AVERAGEATTEMPT:
 719             $attemptcount = scorm_get_attempt_count($userid, $scorm, true);
 720             if (empty($attemptcount)) {
 721                 return 0;
 722             } else {
 723                 $attemptcount = count($attemptcount);
 724             }
 725             $lastattempt = scorm_get_last_attempt($scorm->id, $userid);
 726             $sumscore = 0;
 727             for ($attempt = 1; $attempt <= $lastattempt; $attempt++) {
 728                 $attemptscore = scorm_grade_user_attempt($scorm, $userid, $attempt);
 729                 $sumscore += $attemptscore;
 730             }
 731
 732             return round($sumscore / $attemptcount);
 733         break;
 734     }
 735 }
 736
 737 function scorm_count_launchable($scormid, $organization='') {
 738     global $DB;
 739
 740     $sqlorganization = '';
 741     $params = array($scormid);
 742     if (!empty($organization)) {
 743         $sqlorganization = " AND organization=?";
 744         $params[] = $organization;
 745     }
 746     return $DB->count_records_select('scorm_scoes', "scorm = ? $sqlorganization AND ".$DB->sql_isnotempty('scorm_scoes', 'launch', false, true), $params);
 747 }
 748
 749 /**
 750  * Returns the last attempt used - if no attempts yet, returns 1 for first attempt
 751  *
 752  * @param int $scormid the id of the scorm.
 753  * @param int $userid the id of the user.
 754  *
 755  * @return int The attempt number to use.
 756  */
 757 function scorm_get_last_attempt($scormid, $userid) {
 758     global $DB;
 759
 760     /// Find the last attempt number for the given user id and scorm id
 761     $sql = "SELECT MAX(attempt)
 762               FROM {scorm_scoes_track}
 763              WHERE userid = ? AND scormid = ?";
 764     $lastattempt = $DB->get_field_sql($sql, array($userid, $scormid));
 765     if (empty($lastattempt)) {
 766         return '1';
 767     } else {
 768         return $lastattempt;
 769     }
 770 }
 771
 772 /**
 773  * Returns the last completed attempt used - if no completed attempts yet, returns 1 for first attempt
 774  *
 775  * @param int $scormid the id of the scorm.
 776  * @param int $userid the id of the user.
 777  *
 778  * @return int The attempt number to use.
 779  */
 780 function scorm_get_last_completed_attempt($scormid, $userid) {
 781     global $DB;
 782
 783     /// Find the last completed attempt number for the given user id and scorm id
 784     $sql = "SELECT MAX(attempt)
 785               FROM {scorm_scoes_track}
 786              WHERE userid = ? AND scormid = ?
 787                AND (value='completed' OR value='passed')";
 788     $lastattempt = $DB->get_field_sql($sql, array($userid, $scormid));
 789     if (empty($lastattempt)) {
 790         return '1';
 791     } else {
 792         return $lastattempt;
 793     }
 794 }
 795
 796 /**
 797  * Returns the full list of attempts a user has made.
 798  *
 799  * @param int $scormid the id of the scorm.
 800  * @param int $userid the id of the user.
 801  *
 802  * @return array array of attemptids
 803  */
 804 function scorm_get_all_attempts($scormid, $userid) {
 805     global $DB;
 806     $attemptids = array();
 807     $sql = "SELECT DISTINCT attempt FROM {scorm_scoes_track} WHERE userid = ? AND scormid = ? ORDER BY attempt";
 808     $attempts = $DB->get_records_sql($sql, array($userid, $scormid));
 809     foreach ($attempts as $attempt) {
 810         $attemptids[] = $attempt->attempt;
 811     }
 812     return $attemptids;
 813 }
 814
 815 function scorm_view_display ($user, $scorm, $action, $cm) {
 816     global $CFG, $DB, $PAGE, $OUTPUT, $COURSE;
 817
 818     if ($scorm->scormtype != SCORM_TYPE_LOCAL && $scorm->updatefreq == SCORM_UPDATE_EVERYTIME) {
 819         scorm_parse($scorm, false);
 820     }
 821
 822     $organization = optional_param('organization', '', PARAM_INT);
 823
 824     if ($scorm->displaycoursestructure == 1) {
 825         echo $OUTPUT->box_start('generalbox boxaligncenter toc');
 826         ?>
 827         <div class="structurehead"><?php print_string('contents', 'scorm') ?></div>
 828         <?php
 829     }
 830     if (empty($organization)) {
 831         $organization = $scorm->launch;
 832     }
 833     if ($orgs = $DB->get_records_select_menu('scorm_scoes', 'scorm = ? AND '.
 834                                          $DB->sql_isempty('scorm_scoes', 'launch', false, true).' AND '.
 835                                          $DB->sql_isempty('scorm_scoes', 'organization', false, false),
 836                                          array($scorm->id), 'sortorder, id', 'id,title')) {
 837         if (count($orgs) > 1) {
 838             $select = new single_select(new moodle_url($action), 'organization', $orgs, $organization, null);
 839             $select->label = get_string('organizations', 'scorm');
 840             $select->class = 'scorm-center';
 841             echo $OUTPUT->render($select);
 842         }
 843     }
 844     $orgidentifier = '';
 845     if ($sco = scorm_get_sco($organization, SCO_ONLY)) {
 846         if (($sco->organization == '') && ($sco->launch == '')) {
 847             $orgidentifier = $sco->identifier;
 848         } else {
 849             $orgidentifier = $sco->organization;
 850         }
 851     }
 852
 853     $scorm->version = strtolower(clean_param($scorm->version, PARAM_SAFEDIR));   // Just to be safe
 854     if (!file_exists($CFG->dirroot.'/mod/scorm/datamodels/'.$scorm->version.'lib.php')) {
 855         $scorm->version = 'scorm_12';
 856     }
 857     require_once($CFG->dirroot.'/mod/scorm/datamodels/'.$scorm->version.'lib.php');
 858
 859     $result = scorm_get_toc($user, $scorm, $cm->id, TOCFULLURL, $orgidentifier);
 860     $incomplete = $result->incomplete;
 861
 862     // do we want the TOC to be displayed?
 863     if ($scorm->displaycoursestructure == 1) {
 864         echo $result->toc;
 865         echo $OUTPUT->box_end();
 866     }
 867
 868     // is this the first attempt ?
 869     $attemptcount = scorm_get_attempt_count($user->id, $scorm);
 870
 871     // do not give the player launch FORM if the SCORM object is locked after the final attempt
 872     if ($scorm->lastattemptlock == 0 || $result->attemptleft > 0) {
 873         ?>
 874             <div class="scorm-center">
 875                <form id="scormviewform" method="post" action="<?php echo $CFG->wwwroot ?>/mod/scorm/player.php">
 876         <?php
 877         if ($scorm->hidebrowse == 0) {
 878             print_string('mode', 'scorm');
 879             echo ': <input type="radio" id="b" name="mode" value="browse" /><label for="b">'.get_string('browse', 'scorm').'</label>'."\n";
 880             echo '<input type="radio" id="n" name="mode" value="normal" checked="checked" /><label for="n">'.get_string('normal', 'scorm')."</label>\n";
 881         } else {
 882             echo '<input type="hidden" name="mode" value="normal" />'."\n";
 883         }
 884         if ($scorm->forcenewattempt == 1) {
 885             if ($incomplete === false) {
 886                 echo '<input type="hidden" name="newattempt" value="on" />'."\n";
 887             }
 888         } else if (!empty($attemptcount) && ($incomplete === false) && (($result->attemptleft > 0)||($scorm->maxattempt == 0))) {
 889             ?>
 890                       <br />
 891                       <input type="checkbox" id="a" name="newattempt" />
 892                       <label for="a"><?php print_string('newattempt', 'scorm') ?></label>
 893             <?php
 894         }
 895         if (!empty($scorm->popup)) {
 896             echo '<input type="hidden" name="display" value="popup" />'."\n";
 897         }
 898         ?>
 899               <br />
 900               <input type="hidden" name="scoid"/>
 901               <input type="hidden" name="cm" value="<?php echo $cm->id ?>"/>
 902               <input type="hidden" name="currentorg" value="<?php echo $orgidentifier ?>" />
 903               <input type="submit" value="<?php print_string('enter', 'scorm') ?>" />
 904               </form>
 905           </div>
 906         <?php
 907     }
 908 }
 909
 910 function scorm_simple_play($scorm, $user, $context, $cmid) {
 911     global $DB;
 912
 913     $result = false;
 914
 915     if (has_capability('mod/scorm:viewreport', $context)) { //if this user can view reports, don't skipview so they can see links to reports.
 916         return $result;
 917     }
 918
 919     if ($scorm->scormtype != SCORM_TYPE_LOCAL && $scorm->updatefreq == SCORM_UPDATE_EVERYTIME) {
 920         scorm_parse($scorm, false);
 921     }
 922     $scoes = $DB->get_records_select('scorm_scoes', 'scorm = ? AND '.
 923         $DB->sql_isnotempty('scorm_scoes', 'launch', false, true), array($scorm->id), 'sortorder, id', 'id');
 924
 925     if ($scoes) {
 926         $orgidentifier = '';
 927         if ($sco = scorm_get_sco($scorm->launch, SCO_ONLY)) {
 928             if (($sco->organization == '') && ($sco->launch == '')) {
 929                 $orgidentifier = $sco->identifier;
 930             } else {
 931                 $orgidentifier = $sco->organization;
 932             }
 933         }
 934         if ($scorm->skipview >= SCORM_SKIPVIEW_FIRST) {
 935             $sco = current($scoes);
 936             $url = new moodle_url('/mod/scorm/player.php', array('a' => $scorm->id,
 937                                                                 'currentorg'=>$orgidentifier,
 938                                                                 'scoid'=>$sco->id));
 939             if ($scorm->skipview == SCORM_SKIPVIEW_ALWAYS || !scorm_has_tracks($scorm->id, $user->id)) {
 940                 if (!empty($scorm->forcenewattempt)) {
 941                     $result = scorm_get_toc($user, $scorm, $cmid, TOCFULLURL, $orgidentifier);
 942                     if ($result->incomplete === false) {
 943                         $url->param('newattempt','on');
 944                     }
 945                 }
 946                 redirect($url);
 947             }
 948         }
 949     }
 950     return $result;
 951 }
 952
 953 function scorm_get_count_users($scormid, $groupingid=null) {
 954     global $CFG, $DB;
 955
 956     if (!empty($groupingid)) {
 957         $sql = "SELECT COUNT(DISTINCT st.userid)
 958                 FROM {scorm_scoes_track} st
 959                     INNER JOIN {groups_members} gm ON st.userid = gm.userid
 960                     INNER JOIN {groupings_groups} gg ON gm.groupid = gg.groupid
 961                 WHERE st.scormid = ? AND gg.groupingid = ?
 962                 ";
 963         $params = array($scormid, $groupingid);
 964     } else {
 965         $sql = "SELECT COUNT(DISTINCT st.userid)
 966                 FROM {scorm_scoes_track} st
 967                 WHERE st.scormid = ?
 968                 ";
 969         $params = array($scormid);
 970     }
 971
 972     return ($DB->count_records_sql($sql, $params));
 973 }
 974
 975 /**
 976  * Build up the JavaScript representation of an array element
 977  *
 978  * @param string $sversion SCORM API version
 979  * @param array $userdata User track data
 980  * @param string $element_name Name of array element to get values for
 981  * @param array $children list of sub elements of this array element that also need instantiating
 982  * @return None
 983  */
 984 function scorm_reconstitute_array_element($sversion, $userdata, $element_name, $children) {
 985     // reconstitute comments_from_learner and comments_from_lms
 986     $current = '';
 987     $current_subelement = '';
 988     $current_sub = '';
 989     $count = 0;
 990     $count_sub = 0;
 991     $scormseperator = '_';
 992     if (scorm_version_check($sversion, SCORM_13)) { //scorm 1.3 elements use a . instead of an _
 993         $scormseperator = '.';
 994     }
 995     // filter out the ones we want
 996     $element_list = array();
 997     foreach ($userdata as $element => $value) {
 998         if (substr($element, 0, strlen($element_name)) == $element_name) {
 999             $element_list[$element] = $value;
1000         }
1001     }
1002
1003     // sort elements in .n array order
1004     uksort($element_list, "scorm_element_cmp");
1005
1006     // generate JavaScript
1007     foreach ($element_list as $element => $value) {
1008         if (scorm_version_check($sversion, SCORM_13)) {
1009             $element = preg_replace('/\.(\d+)\./', ".N\$1.", $element);
1010             preg_match('/\.(N\d+)\./', $element, $matches);
1011         } else {
1012             $element = preg_replace('/\.(\d+)\./', "_\$1.", $element);
1013             preg_match('/\_(\d+)\./', $element, $matches);
1014         }
1015         if (count($matches) > 0 && $current != $matches[1]) {
1016             if ($count_sub > 0) {
1017                 echo '    '.$element_name.$scormseperator.$current.'.'.$current_subelement.'._count = '.$count_sub.";\n";
1018             }
1019             $current = $matches[1];
1020             $count++;
1021             $current_subelement = '';
1022             $current_sub = '';
1023             $count_sub = 0;
1024             $end = strpos($element, $matches[1])+strlen($matches[1]);
1025             $subelement = substr($element, 0, $end);
1026             echo '    '.$subelement." = new Object();\n";
1027             // now add the children
1028             foreach ($children as $child) {
1029                 echo '    '.$subelement.".".$child." = new Object();\n";
1030                 echo '    '.$subelement.".".$child."._children = ".$child."_children;\n";
1031             }
1032         }
1033
1034         // now - flesh out the second level elements if there are any
1035         if (scorm_version_check($sversion, SCORM_13)) {
1036             $element = preg_replace('/(.*?\.N\d+\..*?)\.(\d+)\./', "\$1.N\$2.", $element);
1037             preg_match('/.*?\.N\d+\.(.*?)\.(N\d+)\./', $element, $matches);
1038         } else {
1039             $element = preg_replace('/(.*?\_\d+\..*?)\.(\d+)\./', "\$1_\$2.", $element);
1040             preg_match('/.*?\_\d+\.(.*?)\_(\d+)\./', $element, $matches);
1041         }
1042
1043         // check the sub element type
1044         if (count($matches) > 0 && $current_subelement != $matches[1]) {
1045             if ($count_sub > 0) {
1046                 echo '    '.$element_name.$scormseperator.$current.'.'.$current_subelement.'._count = '.$count_sub.";\n";
1047             }
1048             $current_subelement = $matches[1];
1049             $current_sub = '';
1050             $count_sub = 0;
1051             $end = strpos($element, $matches[1])+strlen($matches[1]);
1052             $subelement = substr($element, 0, $end);
1053             echo '    '.$subelement." = new Object();\n";
1054         }
1055
1056         // now check the subelement subscript
1057         if (count($matches) > 0 && $current_sub != $matches[2]) {
1058             $current_sub = $matches[2];
1059             $count_sub++;
1060             $end = strrpos($element, $matches[2])+strlen($matches[2]);
1061             $subelement = substr($element, 0, $end);
1062             echo '    '.$subelement." = new Object();\n";
1063         }
1064
1065         echo '    '.$element.' = \''.$value."';\n";
1066     }
1067     if ($count_sub > 0) {
1068         echo '    '.$element_name.$scormseperator.$current.'.'.$current_subelement.'._count = '.$count_sub.";\n";
1069     }
1070     if ($count > 0) {
1071         echo '    '.$element_name.'._count = '.$count.";\n";
1072     }
1073 }
1074
1075 /**
1076  * Build up the JavaScript representation of an array element
1077  *
1078  * @param string $a left array element
1079  * @param string $b right array element
1080  * @return comparator - 0,1,-1
1081  */
1082 function scorm_element_cmp($a, $b) {
1083     preg_match('/.*?(\d+)\./', $a, $matches);
1084     $left = intval($matches[1]);
1085     preg_match('/.?(\d+)\./', $b, $matches);
1086     $right = intval($matches[1]);
1087     if ($left < $right) {
1088         return -1; // smaller
1089     } else if ($left > $right) {
1090         return 1;  // bigger
1091     } else {
1092         // look for a second level qualifier eg cmi.interactions_0.correct_responses_0.pattern
1093         if (preg_match('/.*?(\d+)\.(.*?)\.(\d+)\./', $a, $matches)) {
1094             $leftterm = intval($matches[2]);
1095             $left = intval($matches[3]);
1096             if (preg_match('/.*?(\d+)\.(.*?)\.(\d+)\./', $b, $matches)) {
1097                 $rightterm = intval($matches[2]);
1098                 $right = intval($matches[3]);
1099                 if ($leftterm < $rightterm) {
1100                     return -1; // smaller
1101                 } else if ($leftterm > $rightterm) {
1102                     return 1;  // bigger
1103                 } else {
1104                     if ($left < $right) {
1105                         return -1; // smaller
1106                     } else if ($left > $right) {
1107                         return 1;  // bigger
1108                     }
1109                 }
1110             }
1111         }
1112         // fall back for no second level matches or second level matches are equal
1113         return 0;  // equal to
1114     }
1115 }
1116
1117 /**
1118  * Generate the user attempt status string
1119  *
1120  * @param object $user Current context user
1121  * @param object $scorm a moodle scrom object - mdl_scorm
1122  * @return string - Attempt status string
1123  */
1124 function scorm_get_attempt_status($user, $scorm, $cm='') {
1125     global $DB, $PAGE, $OUTPUT;
1126
1127     $attempts = scorm_get_attempt_count($user->id, $scorm, true);
1128     if (empty($attempts)) {
1129         $attemptcount = 0;
1130     } else {
1131         $attemptcount = count($attempts);
1132     }
1133
1134     $result = '<p>'.get_string('noattemptsallowed', 'scorm').': ';
1135     if ($scorm->maxattempt > 0) {
1136         $result .= $scorm->maxattempt . '<br />';
1137     } else {
1138         $result .= get_string('unlimited').'<br />';
1139     }
1140     $result .= get_string('noattemptsmade', 'scorm').': ' . $attemptcount . '<br />';
1141
1142     if ($scorm->maxattempt == 1) {
1143         switch ($scorm->grademethod) {
1144             case GRADEHIGHEST:
1145                 $grademethod = get_string('gradehighest', 'scorm');
1146             break;
1147             case GRADEAVERAGE:
1148                 $grademethod = get_string('gradeaverage', 'scorm');
1149             break;
1150             case GRADESUM:
1151                 $grademethod = get_string('gradesum', 'scorm');
1152             break;
1153             case GRADESCOES:
1154                 $grademethod = get_string('gradescoes', 'scorm');
1155             break;
1156         }
1157     } else {
1158         switch ($scorm->whatgrade) {
1159             case HIGHESTATTEMPT:
1160                 $grademethod = get_string('highestattempt', 'scorm');
1161             break;
1162             case AVERAGEATTEMPT:
1163                 $grademethod = get_string('averageattempt', 'scorm');
1164             break;
1165             case FIRSTATTEMPT:
1166                 $grademethod = get_string('firstattempt', 'scorm');
1167             break;
1168             case LASTATTEMPT:
1169                 $grademethod = get_string('lastattempt', 'scorm');
1170             break;
1171         }
1172     }
1173
1174     if (!empty($attempts)) {
1175         $i = 1;
1176         foreach ($attempts as $attempt) {
1177             $gradereported = scorm_grade_user_attempt($scorm, $user->id, $attempt->attemptnumber);
1178             if ($scorm->grademethod !== GRADESCOES && !empty($scorm->maxgrade)) {
1179                 $gradereported = $gradereported/$scorm->maxgrade;
1180                 $gradereported = number_format($gradereported*100, 0) .'%';
1181             }
1182             $result .= get_string('gradeforattempt', 'scorm').' ' . $i . ': ' . $gradereported .'<br />';
1183             $i++;
1184         }
1185     }
1186     $calculatedgrade = scorm_grade_user($scorm, $user->id);
1187     if ($scorm->grademethod !== GRADESCOES && !empty($scorm->maxgrade)) {
1188         $calculatedgrade = $calculatedgrade/$scorm->maxgrade;
1189         $calculatedgrade = number_format($calculatedgrade*100, 0) .'%';
1190     }
1191     $result .= get_string('grademethod', 'scorm'). ': ' . $grademethod;
1192     if (empty($attempts)) {
1193         $result .= '<br />' . get_string('gradereported', 'scorm') . ': ' . get_string('none') . '<br />';
1194     } else {
1195         $result .= '<br />' . get_string('gradereported', 'scorm') . ': ' . $calculatedgrade . '<br />';
1196     }
1197     $result .= '</p>';
1198     if ($attemptcount >= $scorm->maxattempt and $scorm->maxattempt > 0) {
1199         $result .= '<p><font color="#cc0000">'.get_string('exceededmaxattempts', 'scorm').'</font></p>';
1200     }
1201     if (!empty($cm)) {
1202         $context = context_module::instance($cm->id);
1203         if (has_capability('mod/scorm:deleteownresponses', $context) &&
1204             $DB->record_exists('scorm_scoes_track', array('userid' => $user->id, 'scormid' => $scorm->id))) {
1205             //check to see if any data is stored for this user:
1206             $deleteurl = new moodle_url($PAGE->url, array('action'=>'delete', 'sesskey' => sesskey()));
1207             $result .= $OUTPUT->single_button($deleteurl, get_string('deleteallattempts', 'scorm'));
1208         }
1209     }
1210
1211
1212     return $result;
1213 }
1214
1215 /**
1216  * Get SCORM attempt count
1217  *
1218  * @param object $user Current context user
1219  * @param object $scorm a moodle scrom object - mdl_scorm
1220  * @param bool $attempts return the list of attempts
1221  * @return int - no. of attempts so far
1222  */
1223 function scorm_get_attempt_count($userid, $scorm, $attempts_only=false) {
1224     global $DB;
1225     $attemptcount = 0;
1226     $element = 'cmi.core.score.raw';
1227     if ($scorm->grademethod == GRADESCOES) {
1228         $element = 'cmi.core.lesson_status';
1229     }
1230     if (scorm_version_check($scorm->version, SCORM_13)) {
1231         $element = 'cmi.score.raw';
1232     }
1233     $attempts = $DB->get_records_select('scorm_scoes_track', "element=? AND userid=? AND scormid=?", array($element, $userid, $scorm->id), 'attempt', 'DISTINCT attempt AS attemptnumber');
1234     if ($attempts_only) {
1235         return $attempts;
1236     }
1237     if (!empty($attempts)) {
1238         $attemptcount = count($attempts);
1239     }
1240     return $attemptcount;
1241 }
1242
1243 /**
1244  * Figure out with this is a debug situation
1245  *
1246  * @param object $scorm a moodle scrom object - mdl_scorm
1247  * @return boolean - debugging true/false
1248  */
1249 function scorm_debugging($scorm) {
1250     global $CFG, $USER;
1251     $cfg_scorm = get_config('scorm');
1252
1253     if (!$cfg_scorm->allowapidebug) {
1254         return false;
1255     }
1256     $identifier = $USER->username.':'.$scorm->name;
1257     $test = $cfg_scorm->apidebugmask;
1258     // check the regex is only a short list of safe characters
1259     if (!preg_match('/^[\w\s\*\.\?\+\:\_\\\]+$/', $test)) {
1260         return false;
1261     }
1262     $res = false;
1263     eval('$res = preg_match(\'/^'.$test.'/\', $identifier) ? true : false;');
1264     return $res;
1265 }
1266
1267 /**
1268  * Delete Scorm tracks for selected users
1269  *
1270  * @param array $attemptids list of attempts that need to be deleted
1271  * @param int $scorm instance
1272  *
1273  * return bool true deleted all responses, false failed deleting an attempt - stopped here
1274  */
1275 function scorm_delete_responses($attemptids, $scorm) {
1276     if (!is_array($attemptids) || empty($attemptids)) {
1277         return false;
1278     }
1279
1280     foreach ($attemptids as $num => $attemptid) {
1281         if (empty($attemptid)) {
1282             unset($attemptids[$num]);
1283         }
1284     }
1285
1286     foreach ($attemptids as $attempt) {
1287         $keys = explode(':', $attempt);
1288         if (count($keys) == 2) {
1289             $userid = clean_param($keys[0], PARAM_INT);
1290             $attemptid = clean_param($keys[1], PARAM_INT);
1291             if (!$userid || !$attemptid || !scorm_delete_attempt($userid, $scorm, $attemptid)) {
1292                     return false;
1293             }
1294         } else {
1295             return false;
1296         }
1297     }
1298     return true;
1299 }
1300
1301 /**
1302  * Delete Scorm tracks for selected users
1303  *
1304  * @param int $userid ID of User
1305  * @param int $scormid ID of Scorm
1306  * @param int $attemptid user attempt that need to be deleted
1307  *
1308  * return bool true suceeded
1309  */
1310 function scorm_delete_attempt($userid, $scorm, $attemptid) {
1311     global $DB;
1312
1313     $DB->delete_records('scorm_scoes_track', array('userid' => $userid, 'scormid' => $scorm->id, 'attempt' => $attemptid));
1314     include_once('lib.php');
1315     scorm_update_grades($scorm, $userid, true);
1316     return true;
1317 }
1318
1319 /**
1320  * Converts SCORM duration notation to human-readable format
1321  * The function works with both SCORM 1.2 and SCORM 2004 time formats
1322  * @param $duration string SCORM duration
1323  * @return string human-readable date/time
1324  */
1325 function scorm_format_duration($duration) {
1326     // fetch date/time strings
1327     $stryears = get_string('years');
1328     $strmonths = get_string('nummonths');
1329     $strdays = get_string('days');
1330     $strhours = get_string('hours');
1331     $strminutes = get_string('minutes');
1332     $strseconds = get_string('seconds');
1333
1334     if ($duration[0] == 'P') {
1335         // if timestamp starts with 'P' - it's a SCORM 2004 format
1336         // this regexp discards empty sections, takes Month/Minute ambiguity into consideration,
1337         // and outputs filled sections, discarding leading zeroes and any format literals
1338         // also saves the only zero before seconds decimals (if there are any) and discards decimals if they are zero
1339         $pattern = array( '#([A-Z])0+Y#', '#([A-Z])0+M#', '#([A-Z])0+D#', '#P(|\d+Y)0*(\d+)M#', '#0*(\d+)Y#', '#0*(\d+)D#', '#P#',
1340                           '#([A-Z])0+H#', '#([A-Z])[0.]+S#', '#\.0+S#', '#T(|\d+H)0*(\d+)M#', '#0*(\d+)H#', '#0+\.(\d+)S#', '#0*([\d.]+)S#', '#T#' );
1341         $replace = array( '$1', '$1', '$1', '$1$2 '.$strmonths.' ', '$1 '.$stryears.' ', '$1 '.$strdays.' ', '',
1342                           '$1', '$1', 'S', '$1$2 '.$strminutes.' ', '$1 '.$strhours.' ', '0.$1 '.$strseconds, '$1 '.$strseconds, '');
1343     } else {
1344         // else we have SCORM 1.2 format there
1345         // first convert the timestamp to some SCORM 2004-like format for conveniency
1346         $duration = preg_replace('#^(\d+):(\d+):([\d.]+)$#', 'T$1H$2M$3S', $duration);
1347         // then convert in the same way as SCORM 2004
1348         $pattern = array( '#T0+H#', '#([A-Z])0+M#', '#([A-Z])[0.]+S#', '#\.0+S#', '#0*(\d+)H#', '#0*(\d+)M#', '#0+\.(\d+)S#', '#0*([\d.]+)S#', '#T#' );
1349         $replace = array( 'T', '$1', '$1', 'S', '$1 '.$strhours.' ', '$1 '.$strminutes.' ', '0.$1 '.$strseconds, '$1 '.$strseconds, '' );
1350     }
1351
1352     $result = preg_replace($pattern, $replace, $duration);
1353
1354     return $result;
1355 }
1356
1357 function scorm_get_toc_object($user, $scorm, $currentorg='', $scoid='', $mode='normal', $attempt='', $play=false, $organizationsco=null) {
1358     global $CFG, $DB, $PAGE, $OUTPUT;
1359
1360     $modestr = '';
1361     if ($mode != 'normal') {
1362         $modestr = '&mode='.$mode;
1363     }
1364
1365     $result = array();
1366     $incomplete = false;
1367
1368     if (!empty($organizationsco)) {
1369         $result[0] = $organizationsco;
1370         $result[0]->isvisible = true;
1371         $result[0]->statusicon = '';
1372         $result[0]->url = '';
1373     }
1374
1375     if ($scoes = scorm_get_scoes($scorm->id, $currentorg)){
1376         // Retrieve user tracking data for each learning object.
1377         $usertracks = array();
1378         foreach ($scoes as $sco) {
1379             if (!empty($sco->launch)) {
1380                 if ($usertrack = scorm_get_tracks($sco->id, $user->id, $attempt)) {
1381                     if ($usertrack->status == '') {
1382                         $usertrack->status = 'notattempted';
1383                     }
1384                     $usertracks[$sco->identifier] = $usertrack;
1385                 }
1386             }
1387         }
1388         foreach ($scoes as $sco) {
1389             if (!isset($sco->isvisible)) {
1390                 $sco->isvisible = true;
1391             }
1392
1393             if (empty($sco->title)) {
1394                 $sco->title = $sco->identifier;
1395             }
1396
1397             if (scorm_version_check($scorm->version, SCORM_13)) {
1398                 $sco->prereq = true;
1399             } else {
1400                 $sco->prereq = empty($sco->prerequisites) || scorm_eval_prerequisites($sco->prerequisites, $usertracks);
1401             }
1402
1403             if ($sco->isvisible) {
1404                 if (!empty($sco->launch)) {
1405                     if (empty($scoid) && ($mode != 'normal')) {
1406                         $scoid = $sco->id;
1407                     }
1408
1409                     if (isset($usertracks[$sco->identifier])) {
1410                         $usertrack = $usertracks[$sco->identifier];
1411                         $strstatus = get_string($usertrack->status,'scorm');
1412
1413                         if ($sco->scormtype == 'sco') {
1414                             $statusicon = '<img src="'.$OUTPUT->pix_url($usertrack->status, 'scorm').'" alt="'.$strstatus.'" title="'.$strstatus.'" />';
1415                         } else {
1416                             $statusicon = '<img src="'.$OUTPUT->pix_url('asset', 'scorm').'" alt="'.get_string('assetlaunched', 'scorm').'" title="'.get_string('assetlaunched', 'scorm').'" />';
1417                         }
1418
1419                         if (($usertrack->status == 'notattempted') || ($usertrack->status == 'incomplete') || ($usertrack->status == 'browsed')) {
1420                             $incomplete = true;
1421                             if ($play && empty($scoid)) {
1422                                 $scoid = $sco->id;
1423                             }
1424                         }
1425
1426                         $strsuspended = get_string('suspended', 'scorm');
1427
1428                         $exitvar = 'cmi.core.exit';
1429
1430                         if (scorm_version_check($scorm->version, SCORM_13)) {
1431                             $exitvar = 'cmi.exit';
1432                         }
1433
1434                         if ($incomplete && isset($usertrack->{$exitvar}) && ($usertrack->{$exitvar} == 'suspend')) {
1435                             $statusicon = '<img src="'.$OUTPUT->pix_url('suspend', 'scorm').'" alt="'.$strstatus.' - '.$strsuspended.'" title="'.$strstatus.' - '.$strsuspended.'" />';
1436                         }
1437
1438                     } else {
1439                         if ($play && empty($scoid)) {
1440                             $scoid = $sco->id;
1441                         }
1442
1443                         $incomplete = true;
1444
1445                         if ($sco->scormtype == 'sco') {
1446                             $statusicon = '<img src="'.$OUTPUT->pix_url('notattempted', 'scorm').'" alt="'.get_string('notattempted', 'scorm').'" title="'.get_string('notattempted', 'scorm').'" />';
1447                         } else {
1448                             $statusicon = '<img src="'.$OUTPUT->pix_url('asset', 'scorm').'" alt="'.get_string('asset', 'scorm').'" title="'.get_string('asset', 'scorm').'" />';
1449                         }
1450                     }
1451                 }
1452             }
1453
1454             if (empty($statusicon)) {
1455                 $sco->statusicon = '<img src="'.$OUTPUT->pix_url('notattempted', 'scorm').'" alt="'.get_string('notattempted', 'scorm').'" title="'.get_string('notattempted', 'scorm').'" />';
1456             } else {
1457                 $sco->statusicon = $statusicon;
1458             }
1459
1460             $sco->url = 'a='.$scorm->id.'&scoid='.$sco->id.'&currentorg='.$currentorg.$modestr.'&attempt='.$attempt;
1461             $sco->incomplete = $incomplete;
1462
1463             if (!in_array($sco->id, array_keys($result))) {
1464                 $result[$sco->id] = $sco;
1465             }
1466         }
1467     }
1468
1469     // Get the parent scoes!
1470     $result = scorm_get_toc_get_parent_child($result, $currentorg);
1471
1472     // Be safe, prevent warnings from showing up while returning array
1473     if (!isset($scoid)) {
1474         $scoid = '';
1475     }
1476
1477     return array('scoes' => $result, 'usertracks' => $usertracks, 'scoid' => $scoid);
1478 }
1479
1480 function scorm_get_toc_get_parent_child(&$result, $currentorg) {
1481     $final = array();
1482     $level = 0;
1483     // Organization is always the root, prevparent.
1484     if (!empty($currentorg)) {
1485         $prevparent = $currentorg;
1486     } else {
1487         $prevparent = '/';
1488     }
1489
1490     foreach ($result as $sco) {
1491         if ($sco->parent == '/') {
1492             $final[$level][$sco->identifier] = $sco;
1493             $prevparent = $sco->identifier;
1494             unset($result[$sco->id]);
1495         } else {
1496             if ($sco->parent == $prevparent) {
1497                 $final[$level][$sco->identifier] = $sco;
1498                 $prevparent = $sco->identifier;
1499                 unset($result[$sco->id]);
1500             } else {
1501                 if (!empty($final[$level])) {
1502                     $found = false;
1503                     foreach ($final[$level] as $fin) {
1504                         if ($sco->parent == $fin->identifier) {
1505                             $found = true;
1506                         }
1507                     }
1508
1509                     if ($found) {
1510                         $final[$level][$sco->identifier] = $sco;
1511                         unset($result[$sco->id]);
1512                         $found = false;
1513                     } else {
1514                         $level++;
1515                         $final[$level][$sco->identifier] = $sco;
1516                         unset($result[$sco->id]);
1517                     }
1518                 }
1519             }
1520         }
1521     }
1522
1523     for ($i = 0; $i <= $level; $i++) {
1524         $prevparent = '';
1525         foreach ($final[$i] as $ident => $sco) {
1526             if (empty($prevparent)) {
1527                 $prevparent = $ident;
1528             }
1529             if (!isset($final[$i][$prevparent]->children)) {
1530                 $final[$i][$prevparent]->children = array();
1531             }
1532             if ($sco->parent == $prevparent) {
1533                 $final[$i][$prevparent]->children[] = $sco;
1534                 $prevparent = $ident;
1535             } else {
1536                 $parent = false;
1537                 foreach ($final[$i] as $identifier => $scoobj) {
1538                     if ($identifier == $sco->parent) {
1539                         $parent = $identifier;
1540                     }
1541                 }
1542
1543                 if ($parent !== false) {
1544                     $final[$i][$parent]->children[] = $sco;
1545                 }
1546             }
1547         }
1548     }
1549
1550     $results = array();
1551     for ($i = 0; $i <= $level; $i++) {
1552         $keys = array_keys($final[$i]);
1553         $results[] = $final[$i][$keys[0]];
1554     }
1555
1556     return $results;
1557 }
1558
1559 function scorm_format_toc_for_treeview($user, $scorm, $scoes, $usertracks, $cmid, $toclink=TOCJSLINK, $currentorg='', $attempt='', $play=false, $organizationsco=null, $children=false) {
1560     global $CFG;
1561
1562     $result = new stdClass();
1563     $result->prerequisites = true;
1564     $result->incomplete = true;
1565     $result->toc = '';
1566
1567     if (!$children) {
1568         $attemptsmade = scorm_get_attempt_count($user->id, $scorm);
1569         $result->attemptleft = $scorm->maxattempt == 0 ? 1 : $scorm->maxattempt - $attemptsmade;
1570     }
1571
1572     if (!$children) {
1573         $result->toc = "<ul>\n";
1574
1575         if (!$play && !empty($organizationsco))  {
1576             $result->toc .= "\t<li>".$organizationsco->title."</li>\n";
1577         }
1578     }
1579
1580     $prevsco = '';
1581     if (!empty($scoes)) {
1582         foreach ($scoes as $sco) {
1583             $result->toc .= "\t<li>\n";
1584             $scoid = $sco->id;
1585
1586             $sco->isvisible = true;
1587
1588             if ($sco->isvisible) {
1589                 $score = '';
1590
1591                 if (isset($usertracks[$sco->identifier])) {
1592                     $viewscore = has_capability('mod/scorm:viewscores', context_module::instance($cmid));
1593                     if (isset($usertracks[$sco->identifier]->score_raw) && $viewscore) {
1594                         if ($usertracks[$sco->identifier]->score_raw != '') {
1595                             $score = '('.get_string('score','scorm').':&nbsp;'.$usertracks[$sco->identifier]->score_raw.')';
1596                         }
1597                     }
1598                 }
1599
1600                 if (!empty($sco->prereq)) {
1601                     if ($sco->id == $scoid) {
1602                         $result->prerequisites = true;
1603                     }
1604
1605                     if (!empty($prevsco) && scorm_version_check($scorm->version, SCORM_13) && !empty($prevsco->hidecontinue)) {
1606                         if ($sco->scormtype == 'sco') {
1607                             $result->toc .= '<span>'.$sco->statusicon.'&nbsp;'.format_string($sco->title).'</span>';
1608                         } else {
1609                             $result->toc .= '<span>&nbsp;'.format_string($sco->title).'</span>';
1610                         }
1611                     } else if ($toclink == TOCFULLURL) {
1612                         $url = $CFG->wwwroot.'/mod/scorm/player.php?'.$sco->url;
1613                         if (!empty($sco->launch)) {
1614                             if ($sco->scormtype == 'sco') {
1615                                 $result->toc .= $sco->statusicon.'&nbsp;<a href="'.$url.'">'.format_string($sco->title).'</a>'.$score."\n";
1616                             } else {
1617                                 $result->toc .= '&nbsp;<a data-scoid="'.$sco->id.'" href="'.$url.'">'.format_string($sco->title).'</a>'.$score."\n";
1618                             }
1619                         } else {
1620                             if ($sco->scormtype == 'sco') {
1621                                 $result->toc .= $sco->statusicon.'&nbsp;'.format_string($sco->title).$score."\n";
1622                             } else {
1623                                 $result->toc .= '&nbsp;'.format_string($sco->title).$score."\n";
1624                             }
1625                         }
1626                     } else {
1627                         if (!empty($sco->launch)) {
1628                             if ($sco->scormtype == 'sco') {
1629                                 $result->toc .= '<a data-scoid="'.$sco->id.'" title="'.$sco->url.'">'.$sco->statusicon.'&nbsp;'.format_string($sco->title).'&nbsp;'.$score.'</a>';
1630                             } else {
1631                                 $result->toc .= '<a data-scoid="'.$sco->id.'" title="'.$sco->url.'">&nbsp;'.format_string($sco->title).'&nbsp;'.$score.'</a>';
1632                             }
1633                         } else {
1634                             if ($sco->scormtype == 'sco') {
1635                                 $result->toc .= '<span>'.$sco->statusicon.'&nbsp;'.format_string($sco->title).'</span>';
1636                             } else {
1637                                 $result->toc .= '<span>&nbsp;'.format_string($sco->title).'</span>';
1638                             }
1639                         }
1640                     }
1641
1642                 } else {
1643                     if ($play) {
1644                         if ($sco->scormtype == 'sco') {
1645                             $result->toc .= '<span>'.$sco->statusicon.'&nbsp;'.format_string($sco->title).'</span>';
1646                         } else {
1647                             $result->toc .= '&nbsp;'.format_string($sco->title).'</span>';
1648                         }
1649                     } else {
1650                         if ($sco->scormtype == 'sco') {
1651                             $result->toc .= $sco->statusicon.'&nbsp;'.format_string($sco->title)."\n";
1652                         } else {
1653                             $result->toc .= '&nbsp;'.format_string($sco->title)."\n";
1654                         }
1655                     }
1656                 }
1657
1658             } else {
1659                 $result->toc .= "\t\t&nbsp;".format_string($sco->title)."\n";
1660             }
1661
1662             if (!empty($sco->children)) {
1663                 $result->toc .= "\n\t\t<ul>\n";
1664                 $childresult = scorm_format_toc_for_treeview($user, $scorm, $sco->children, $usertracks, $cmid, $toclink, $currentorg, $attempt, $play, $organizationsco, true);
1665                 $result->toc .= $childresult->toc;
1666                 $result->toc .= "\t\t</ul>\n";
1667                 $result->toc .= "\t</li>\n";
1668             } else {
1669                 $result->toc .= "\t</li>\n";
1670             }
1671             $prevsco = $sco;
1672         }
1673         $result->incomplete = $sco->incomplete;
1674     }
1675
1676     if (!$children) {
1677         $result->toc .= "</ul>\n";
1678     }
1679
1680     return $result;
1681 }
1682
1683 function scorm_format_toc_for_droplist($scorm, $scoes, $usertracks, $currentorg='', $organizationsco=null, $children=false, $level=0, $tocmenus=array()) {
1684     if (!empty($scoes)) {
1685         if (!empty($organizationsco) && !$children) {
1686             $tocmenus[$organizationsco->id] = $organizationsco->title;
1687         }
1688
1689         $parents[$level]='/';
1690         foreach ($scoes as $sco) {
1691             if ($parents[$level] != $sco->parent) {
1692                 if ($newlevel = array_search($sco->parent, $parents)) {
1693                     $level = $newlevel;
1694                 } else {
1695                     $i = $level;
1696                     while (($i > 0) && ($parents[$level] != $sco->parent)) {
1697                         $i--;
1698                     }
1699
1700                     if (($i == 0) && ($sco->parent != $currentorg)) {
1701                         $level++;
1702                     } else {
1703                         $level = $i;
1704                     }
1705
1706                     $parents[$level] = $sco->parent;
1707                 }
1708             }
1709
1710             if ($sco->prereq) {
1711                 if ($sco->scormtype == 'sco') {
1712                     $tocmenus[$sco->id] = scorm_repeater('&minus;', $level) . '&gt;' . format_string($sco->title);
1713                 }
1714             } else {
1715                 if ($sco->scormtype == 'sco') {
1716                     $tocmenus[$sco->id] = scorm_repeater('&minus;', $level) . '&gt;' . format_string($sco->title);
1717                 }
1718             }
1719
1720             if (!empty($sco->children)) {
1721                 $tocmenus = scorm_format_toc_for_droplist($scorm, $sco->children, $usertracks, $currentorg, $organizationsco, true, $level, $tocmenus);
1722             }
1723         }
1724     }
1725
1726     return $tocmenus;
1727 }
1728
1729 function scorm_get_toc($user, $scorm, $cmid, $toclink=TOCJSLINK, $currentorg='', $scoid='', $mode='normal', $attempt='', $play=false, $tocheader=false) {
1730     global $CFG, $DB, $OUTPUT;
1731
1732     if (empty($attempt)) {
1733         $attempt = scorm_get_attempt_count($user->id, $scorm);
1734     }
1735
1736     $result = new stdClass();
1737     $organizationsco = null;
1738
1739     if ($tocheader) {
1740         $result->toc = "<div id=\"scorm_layout\" class=\"yui3-g-r\">\n";
1741         $result->toc .= "<div id=\"scorm_toc\" class=\"yui3-u-1-5\">\n";
1742         $result->toc .= "<div id=\"scorm_toc_title\"></div>\n";
1743         $result->toc .= "<div id=\"scorm_tree\">\n";
1744     }
1745
1746     if (!empty($currentorg)) {
1747         $organizationsco = $DB->get_record('scorm_scoes', array('scorm'=>$scorm->id, 'identifier'=>$currentorg));
1748         if (!empty($organizationsco->title)) {
1749             if ($play) {
1750                 $result->toctitle = $organizationsco->title;
1751             }
1752         }
1753     }
1754
1755     $scoes = scorm_get_toc_object($user, $scorm, $currentorg, $scoid, $mode, $attempt, $play, $organizationsco);
1756
1757     $treeview = scorm_format_toc_for_treeview($user, $scorm, $scoes['scoes'][0]->children, $scoes['usertracks'], $cmid, $toclink, $currentorg, $attempt, $play, $organizationsco, false);
1758
1759     if ($tocheader) {
1760         $result->toc .= $treeview->toc;
1761     } else {
1762         $result->toc = $treeview->toc;
1763     }
1764
1765     if (!empty($scoes['scoid'])) {
1766         $scoid = $scoes['scoid'];
1767     }
1768
1769     if (empty($scoid)) {
1770         $result->sco = $scoes['scoes'][0]->children[0];
1771     } else {
1772         $result->sco = scorm_get_sco($scoid);
1773     }
1774
1775     if ($scorm->hidetoc == SCORM_TOC_POPUP) {
1776         $tocmenu = scorm_format_toc_for_droplist($scorm, $scoes['scoes'][0]->children, $scoes['usertracks'], $currentorg, $organizationsco);
1777
1778         $modestr = '';
1779         if ($mode != 'normal') {
1780             $modestr = '&mode='.$mode;
1781         }
1782
1783         $url = new moodle_url('/mod/scorm/player.php?a='.$scorm->id.'&currentorg='.$currentorg.$modestr);
1784         $result->tocmenu = $OUTPUT->single_select($url, 'scoid', $tocmenu, $result->sco->id, null, "tocmenu");
1785     }
1786
1787     $result->prerequisites = $treeview->prerequisites;
1788     $result->incomplete = $treeview->incomplete;
1789     $result->attemptleft = $treeview->attemptleft;
1790
1791     if ($tocheader) {
1792         $result->toc .= "</div></div>\n";
1793         $result->toc .= "<div id=\"scorm_toc_toggle\">\n";
1794         $result->toc .= "<button id=\"scorm_toc_toggle_btn\"></button></div>\n";
1795         $result->toc .= "<div id=\"scorm_content\">";
1796         $result->toc .= "<div id=\"scorm_navpanel\"></div>\n";
1797         $result->toc .= "</div></div>\n";
1798     }
1799
1800     return $result;
1801 }
1802
1803 function scorm_get_adlnav_json ($scoes, &$adlnav = array(), $parentscoid = null) {
1804     if (is_object($scoes)) {
1805         $sco = $scoes;
1806         if (isset($sco->url)) {
1807             $adlnav[$sco->id]['identifier'] = $sco->identifier;
1808             $adlnav[$sco->id]['launch'] = $sco->launch;
1809             $adlnav[$sco->id]['title'] = $sco->title;
1810             $adlnav[$sco->id]['url'] = $sco->url;
1811             $adlnav[$sco->id]['parent'] = $sco->parent;
1812             if (isset($sco->choice)) {
1813                 $adlnav[$sco->id]['choice'] = $sco->choice;
1814             }
1815             if (isset($sco->flow)) {
1816                 $adlnav[$sco->id]['flow'] = $sco->flow;
1817             } else if (isset($parentscoid) && isset($adlnav[$parentscoid]['flow'])) {
1818                 $adlnav[$sco->id]['flow'] = $adlnav[$parentscoid]['flow'];
1819             }
1820             if (isset($sco->isvisible)) {
1821                 $adlnav[$sco->id]['isvisible'] = $sco->isvisible;
1822             }
1823             if (isset($sco->parameters)) {
1824                 $adlnav[$sco->id]['parameters'] = $sco->parameters;
1825             }
1826             if (isset($sco->hidecontinue)) {
1827                 $adlnav[$sco->id]['hidecontinue'] = $sco->hidecontinue;
1828             }
1829             if (isset($sco->hideprevious)) {
1830                 $adlnav[$sco->id]['hideprevious'] = $sco->hideprevious;
1831             }
1832             if (isset($sco->hidesuspendall)) {
1833                 $adlnav[$sco->id]['hidesuspendall'] = $sco->hidesuspendall;
1834             }
1835             if (!empty($parentscoid)) {
1836                 $adlnav[$sco->id]['parentscoid'] = $parentscoid;
1837             }
1838             if (isset($adlnav['prevscoid'])) {
1839                 $adlnav[$sco->id]['prevscoid'] = $adlnav['prevscoid'];
1840                 $adlnav[$adlnav['prevscoid']]['nextscoid'] = $sco->id;
1841                 if (isset($adlnav['prevparent']) && $adlnav['prevparent'] == $sco->parent) {
1842                     $adlnav[$sco->id]['prevsibling'] = $adlnav['prevscoid'];
1843                     $adlnav[$adlnav['prevscoid']]['nextsibling'] = $sco->id;
1844                 }
1845             }
1846             $adlnav['prevscoid'] = $sco->id;
1847             $adlnav['prevparent'] = $sco->parent;
1848         }
1849         if (isset($sco->children)) {
1850             foreach ($sco->children as $children) {
1851                 scorm_get_adlnav_json($children, $adlnav, $sco->id);
1852             }
1853         }
1854     } else {
1855         foreach ($scoes as $sco) {
1856             scorm_get_adlnav_json ($sco, $adlnav);
1857         }
1858         unset($adlnav['prevscoid']);
1859         unset($adlnav['prevparent']);
1860     }
1861     return json_encode($adlnav);
1862 }
1863
1864 /**
1865  * Check for the availability of a resource by URL.
1866  *
1867  * Check is performed using an HTTP HEAD call.
1868  *
1869  * @param $url string A valid URL
1870  * @return bool|string True if no issue is found. The error string message, otherwise
1871  */
1872 function scorm_check_url($url) {
1873     $curl = new curl;
1874
1875     if (!ini_get('open_basedir') and !ini_get('safe_mode')) {
1876         // Same options as in {@link download_file_content()}, used in {@link scorm_parse_scorm()}.
1877         $curl->setopt(array('CURLOPT_FOLLOWLOCATION' => true, 'CURLOPT_MAXREDIRS' => 5));
1878     }
1879     $cmsg = $curl->head($url);
1880     $info = $curl->get_info();
1881     if (empty($info['http_code']) || $info['http_code'] != 200) {
1882         return get_string('invalidurlhttpcheck', 'scorm', array('cmsg' => $cmsg));
1883     }
1884
1885     return true;
1886 }