mirror of
https://github.com/moodle/moodle.git
synced 2025-08-04 08:26:37 +02:00
410 lines
18 KiB
PHP
410 lines
18 KiB
PHP
<?php // $Id$
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function scorm_eval_prerequisites($prerequisites,$usertracks) {
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$element = '';
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$stack = array();
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$statuses = array(
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'passed' => 'passed',
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'completed' => 'completed',
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'failed' => 'failed',
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'incomplete' => 'incomplete',
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'browsed' => 'browsed',
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'not attempted' => 'notattempted',
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'p' => 'passed',
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'c' => 'completed',
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'f' => 'failed',
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'i' => 'incomplete',
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'b' => 'browsed',
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'n' => 'notattempted'
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);
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$i=0;
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while ($i<strlen($prerequisites)) {
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$symbol = $prerequisites[$i];
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switch ($symbol) {
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case '&':
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case '|':
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$symbol .= $symbol;
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case '~':
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case '(':
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case ')':
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case '*':
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$element = trim($element);
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if (!empty($element)) {
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$element = trim($element);
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if (isset($usertracks[$element])) {
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$element = '((\''.$usertracks[$element]->status.'\' == \'completed\') || '.
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'(\''.$usertracks[$element]->status.'\' == \'passed\'))';
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} else if (($operator = strpos($element,'=')) !== false) {
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$item = trim(substr($element,0,$operator));
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if (!isset($usertracks[$item])) {
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return false;
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}
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$value = trim(trim(substr($element,$operator+1)),'"');
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if (isset($statuses[$value])) {
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$status = $statuses[$value];
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} else {
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return false;
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}
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$element = '(\''.$usertracks[$item]->status.'\' == \''.$status.'\')';
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} else if (($operator = strpos($element,'<>')) !== false) {
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$item = trim(substr($element,0,$operator));
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if (!isset($usertracks[$item])) {
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return false;
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}
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$value = trim(trim(substr($element,$operator+2)),'"');
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if (isset($statuses[$value])) {
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$status = $statuses[$value];
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} else {
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return false;
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}
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$element = '(\''.$usertracks[$item]->status.'\' != \''.$status.'\')';
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} else if (is_numeric($element)) {
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if ($symbol == '*') {
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$symbol = '';
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$open = strpos($prerequisites,'{',$i);
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$opened = 1;
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$closed = 0;
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for ($close=$open+1; (($opened > $closed) && ($close<strlen($prerequisites))); $close++) {
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if ($prerequisites[$close] == '}') {
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$closed++;
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} else if ($prerequisites[$close] == '{') {
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$opened++;
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}
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}
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$i = $close;
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$setelements = explode(',', substr($prerequisites, $open+1, $close-($open+1)-1));
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$settrue = 0;
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foreach ($setelements as $setelement) {
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if (scorm_eval_prerequisites($setelement,$usertracks)) {
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$settrue++;
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}
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}
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if ($settrue >= $element) {
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$element = 'true';
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} else {
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$element = 'false';
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}
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}
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} else {
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return false;
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}
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array_push($stack,$element);
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$element = '';
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}
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if ($symbol == '~') {
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$symbol = '!';
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}
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if (!empty($symbol)) {
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array_push($stack,$symbol);
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}
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break;
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default:
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$element .= $symbol;
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break;
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}
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$i++;
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}
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if (!empty($element)) {
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$element = trim($element);
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if (isset($usertracks[$element])) {
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$element = '((\''.$usertracks[$element]->status.'\' == \'completed\') || '.
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'(\''.$usertracks[$element]->status.'\' == \'passed\'))';
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} else if (($operator = strpos($element,'=')) !== false) {
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$item = trim(substr($element,0,$operator));
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if (!isset($usertracks[$item])) {
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return false;
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}
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$value = trim(trim(substr($element,$operator+1)),'"');
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if (isset($statuses[$value])) {
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$status = $statuses[$value];
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} else {
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return false;
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}
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$element = '(\''.$usertracks[$item]->status.'\' == \''.$status.'\')';
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} else if (($operator = strpos($element,'<>')) !== false) {
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$item = trim(substr($element,0,$operator));
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if (!isset($usertracks[$item])) {
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return false;
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}
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$value = trim(trim(substr($element,$operator+1)),'"');
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if (isset($statuses[$value])) {
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$status = $statuses[$value];
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} else {
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return false;
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}
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$element = '(\''.$usertracks[$item]->status.'\' != \''.trim($status).'\')';
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} else {
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return false;
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}
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array_push($stack,$element);
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}
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return eval('return '.implode($stack).';');
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}
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function scorm_get_toc($user,$scorm,$liststyle,$currentorg='',$scoid='',$mode='normal',$attempt='',$play=false) {
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global $CFG;
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$strexpand = get_string('expcoll','scorm');
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$modestr = '';
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if ($mode == 'browse') {
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$modestr = '&mode='.$mode;
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}
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$scormpixdir = $CFG->modpixpath.'/scorm/pix';
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$result = new stdClass();
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$result->toc = "<ul id='s0' class='$liststyle'>\n";
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$tocmenus = array();
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$result->prerequisites = true;
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$incomplete = false;
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//
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// Get the current organization infos
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//
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$organizationsql = '';
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if (!empty($currentorg)) {
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if (($organizationtitle = get_field('scorm_scoes','title','scorm',$scorm->id,'identifier',$currentorg)) != '') {
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$result->toc .= "\t<li>$organizationtitle</li>\n";
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$tocmenus[] = $organizationtitle;
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}
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$organizationsql = "AND organization='$currentorg'";
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}
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//
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// If not specified retrieve the last attempt number
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//
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if (empty($attempt)) {
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$attempt = scorm_get_last_attempt($scorm->id, $user->id);
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}
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$result->attemptleft = $scorm->maxattempt - $attempt;
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if ($scoes = get_records_select('scorm_scoes',"scorm='$scorm->id' $organizationsql order by id ASC")){
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// drop keys so that we can access array sequentially
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$scoes = array_values($scoes);
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//
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// Retrieve user tracking data for each learning object
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//
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$usertracks = array();
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foreach ($scoes as $sco) {
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if (!empty($sco->launch)) {
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if ($usertrack=scorm_get_tracks($sco->id,$user->id,$attempt)) {
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if ($usertrack->status == '') {
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$usertrack->status = 'notattempted';
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}
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$usertracks[$sco->identifier] = $usertrack;
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}
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}
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}
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$level=0;
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$sublist=1;
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$previd = 0;
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$nextid = 0;
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$findnext = false;
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$parents[$level]='/';
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foreach ($scoes as $pos=>$sco) {
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$isvisible = false;
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$sco->title = stripslashes($sco->title);
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if ($optionaldatas = scorm_get_sco($sco->id, SCO_DATA)) {
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if (!isset($optionaldatas->isvisible) || (isset($optionaldatas->isvisible) && ($optionaldatas->isvisible == 'true'))) {
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$isvisible = true;
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}
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}
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else{
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$isvisible = true;
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}
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if ($parents[$level]!=$sco->parent) {
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if ($newlevel = array_search($sco->parent,$parents)) {
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for ($i=0; $i<($level-$newlevel); $i++) {
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$result->toc .= "\t\t</ul></li>\n";
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}
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$level = $newlevel;
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} else {
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$i = $level;
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$closelist = '';
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while (($i > 0) && ($parents[$level] != $sco->parent)) {
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$closelist .= "\t\t</ul></li>\n";
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$i--;
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}
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if (($i == 0) && ($sco->parent != $currentorg)) {
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$style = '';
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if (isset($_COOKIE['hide:SCORMitem'.$sco->id])) {
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$style = ' style="display: none;"';
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}
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$result->toc .= "\t\t<li><ul id='s$sublist' class='$liststyle'$style>\n";
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$level++;
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} else {
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$result->toc .= $closelist;
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$level = $i;
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}
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$parents[$level]=$sco->parent;
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}
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}
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if ($isvisible) {
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$result->toc .= "\t\t<li>";
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}
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if (isset($scoes[$pos+1])) {
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$nextsco = $scoes[$pos+1];
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} else {
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$nextsco = false;
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}
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$nextisvisible = false;
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if (($nextsco !== false) && ($optionaldatas = scorm_get_sco($nextsco->id, SCO_DATA))) {
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if (!isset($optionaldatas->isvisible) || (isset($optionaldatas->isvisible) && ($optionaldatas->isvisible == 'true'))) {
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$nextisvisible = true;
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}
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}
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if ($nextisvisible && ($nextsco !== false) && ($sco->parent != $nextsco->parent) && (($level==0) || (($level>0) && ($nextsco->parent == $sco->identifier)))) {
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$sublist++;
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$icon = 'minus';
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if (isset($_COOKIE['hide:SCORMitem'.$nextsco->id])) {
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$icon = 'plus';
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}
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$result->toc .= '<a href="javascript:expandCollide(\'img'.$sublist.'\','.$sublist.','.$nextsco->id.');"><img id="img'.$sublist.'" src="'.$scormpixdir.'/'.$icon.'.gif" alt="'.$strexpand.'" title="'.$strexpand.'"/></a>';
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// $result->toc .= '<a href="#" onclick="elementToggleHide(\''.$sublist.'\',true);"><img id="img'.$sublist.'" src="'.$scormpixdir.'/'.$icon.'.gif" alt="'.$strexpand.'" title="'.$strexpand.'"/></a>';
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} else if ($isvisible) {
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$result->toc .= '<img src="'.$scormpixdir.'/spacer.gif" />';
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}
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if (empty($sco->title)) {
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$sco->title = $sco->identifier;
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}
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if (!empty($sco->launch)) {
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if ($isvisible) {
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$startbold = '';
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$endbold = '';
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$score = '';
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if (empty($scoid) && ($mode != 'normal')) {
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$scoid = $sco->id;
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}
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if (isset($usertracks[$sco->identifier])) {
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$usertrack = $usertracks[$sco->identifier];
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$strstatus = get_string($usertrack->status,'scorm');
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if ($sco->scormtype == 'sco') {
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$statusicon = '<img src="'.$scormpixdir.'/'.$usertrack->status.'.gif" alt="'.$strstatus.'" title="'.$strstatus.'" />';
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} else {
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$statusicon = '<img src="'.$scormpixdir.'/assetc.gif" alt="'.get_string('assetlaunched','scorm').'" title="'.get_string('assetlaunched','scorm').'" />';
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}
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if (($usertrack->status == 'notattempted') || ($usertrack->status == 'incomplete') || ($usertrack->status == 'browsed')) {
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$incomplete = true;
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if ($play && empty($scoid)) {
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$scoid = $sco->id;
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}
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}
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if ($usertrack->score_raw != '') {
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$score = '('.get_string('score','scorm').': '.$usertrack->score_raw.')';
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}
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$strsuspended = get_string('suspended','scorm');
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if (isset($usertrack->{'cmi.core.exit'}) && ($usertrack->{'cmi.core.exit'} == 'suspend')) {
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$statusicon = '<img src="'.$scormpixdir.'/suspend.gif" alt="'.$strstatus.' - '.$strsuspended.'" title="'.$strstatus.' - '.$strsuspended.'" />';
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}
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} else {
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if ($play && empty($scoid)) {
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$scoid = $sco->id;
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}
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$incomplete = true;
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if ($sco->scormtype == 'sco') {
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$statusicon = '<img src="'.$scormpixdir.'/notattempted.gif" alt="'.get_string('notattempted','scorm').'" title="'.get_string('notattempted','scorm').'" />';
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} else {
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$statusicon = '<img src="'.$scormpixdir.'/asset.gif" alt="'.get_string('asset','scorm').'" title="'.get_string('asset','scorm').'" />';
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}
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}
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if ($sco->id == $scoid) {
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$scodata = scorm_get_sco($sco->id, SCO_DATA);
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$startbold = '<b>';
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$endbold = '</b>';
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$findnext = true;
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$shownext = isset($scodata->next) ? $scodata->next : 0;
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$showprev = isset($scodata->previous) ? $scodata->previous : 0;
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}
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if (($nextid == 0) && (scorm_count_launchable($scorm->id,$currentorg) > 1) && ($nextsco!==false) && (!$findnext)) {
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if (!empty($sco->launch)) {
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$previd = $sco->id;
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}
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}
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if (empty($sco->prerequisites) || scorm_eval_prerequisites($sco->prerequisites,$usertracks)) {
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if ($sco->id == $scoid) {
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$result->prerequisites = true;
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}
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$url = $CFG->wwwroot.'/mod/scorm/player.php?a='.$scorm->id.'&currentorg='.$currentorg.$modestr.'&scoid='.$sco->id;
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$result->toc .= $statusicon.' '.$startbold.'<a href="'.$url.'">'.format_string($sco->title).'</a>'.$score.$endbold."</li>\n";
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$tocmenus[$sco->id] = scorm_repeater('−',$level) . '>' . format_string($sco->title);
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} else {
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if ($sco->id == $scoid) {
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$result->prerequisites = false;
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}
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$result->toc .= $statusicon.' '.format_string($sco->title)."</li>\n";
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}
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}
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} else {
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$result->toc .= ' '.format_string($sco->title)."</li>\n";
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}
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if (($nextsco !== false) && ($nextid == 0) && ($findnext)) {
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if (!empty($nextsco->launch)) {
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$nextid = $nextsco->id;
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}
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}
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}
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for ($i=0;$i<$level;$i++) {
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$result->toc .= "\t\t</ul></li>\n";
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}
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if ($play) {
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// it is possible that scoid is still not set, in this case we dont want an empty object
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if ($scoid) {
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$sco = scorm_get_sco($scoid);
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}
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$sco->previd = $previd;
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$sco->nextid = $nextid;
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$result->sco = $sco;
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$result->incomplete = $incomplete;
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} else {
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$result->incomplete = $incomplete;
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}
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}
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$result->toc .= "\t</ul>\n";
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if ($scorm->hidetoc == 0) {
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$result->toc .= '
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<script type="text/javascript">
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//<![CDATA[
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function expandCollide(which,list,item) {
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var nn=document.ids?true:false
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var w3c=document.getElementById?true:false
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var beg=nn?"document.ids.":w3c?"document.getElementById(":"document.all.";
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var mid=w3c?").style":".style";
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which = which.substring(0,(which.length));
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if (eval(beg+list+mid+".display") != "none") {
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document.getElementById(which).src = "'.$scormpixdir.'/plus.gif";
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eval(beg+list+mid+".display=\'none\';");
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new cookie("hide:SCORMitem" + item, 1, 356, "/").set();
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} else {
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document.getElementById(which).src = "'.$scormpixdir.'/minus.gif";
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eval(beg+list+mid+".display=\'block\';");
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new cookie("hide:SCORMitem" + item, 1, -1, "/").set();
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}
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}
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//]]>
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</script>'."\n";
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}
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$url = $CFG->wwwroot.'/mod/scorm/player.php?a='.$scorm->id.'&currentorg='.$currentorg.$modestr.'&scoid=';
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$result->tocmenu = popup_form($url,$tocmenus, "tocmenu", $sco->id, '', '', '', true);
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return $result;
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}
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?>
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