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executable file 1341 lines (1240 sloc) 53.046 kb
<?php // $Id$
/// Local Library of functions and constants for module scorm
/**
* Create a new temporary subdirectory with a random name in the given path
*
* @param string $strpath The scorm data directory
* @return string/boolean
*/
function scorm_datadir($strPath)
{
global $CFG;
if (is_dir($strPath)) {
do {
// Create a random string of 8 chars
$randstring = NULL;
$lchar = '';
$len = 8;
for ($i=0; $i<$len; $i++) {
$char = chr(rand(48,122));
while (!ereg('[a-zA-Z0-9]', $char)){
if ($char == $lchar) continue;
$char = chr(rand(48,90));
}
$randstring .= $char;
$lchar = $char;
}
$datadir='/'.$randstring;
} while (file_exists($strPath.$datadir));
mkdir($strPath.$datadir, $CFG->directorypermissions);
@chmod($strPath.$datadir, $CFG->directorypermissions); // Just in case mkdir didn't do it
return $strPath.$datadir;
} else {
return false;
}
}
/**
* Given a package directory, this function will check if the package is valid
*
* @param string $packagedir The package directory
* @return mixed
*/
function scorm_validate($packagedir) {
$validation = new stdClass();
if (is_file($packagedir.'/imsmanifest.xml')) {
$validation->result = 'found';
$validation->pkgtype = 'SCORM';
} else {
if ($handle = opendir($packagedir)) {
while (($file = readdir($handle)) !== false) {
$ext = substr($file,strrpos($file,'.'));
if (strtolower($ext) == '.cst') {
$validation->result = 'found';
$validation->pkgtype = 'AICC';
break;
}
}
closedir($handle);
}
if (!isset($validation)) {
$validation->result = 'nomanifest';
$validation->pkgtype = 'SCORM';
}
}
return $validation;
}
function scorm_get_user_data($userid) {
/// Gets user info required to display the table of scorm results
/// for report.php
return get_record('user','id',$userid,'','','','','firstname, lastname, picture');
}
function scorm_string_wrap($stringa, $len=15) {
// Crop the given string into max $len characters lines
$textlib = textlib_get_instance();
if ($textlib->strlen($stringa, current_charset()) > $len) {
$words = explode(' ', $stringa);
$newstring = '';
$substring = '';
foreach ($words as $word) {
if (($textlib->strlen($substring, current_charset())+$textlib->strlen($word, current_charset())+1) < $len) {
$substring .= ' '.$word;
} else {
$newstring .= ' '.$substring.'<br />';
$substring = $word;
}
}
if (!empty($substring)) {
$newstring .= ' '.$substring;
}
return $newstring;
} else {
return $stringa;
}
}
function scorm_eval_prerequisites($prerequisites,$usertracks) {
$element = '';
$stack = array();
$statuses = array(
'passed' => 'passed',
'completed' => 'completed',
'failed' => 'failed',
'incomplete' => 'incomplete',
'browsed' => 'browsed',
'not attempted' => 'notattempted',
'p' => 'passed',
'c' => 'completed',
'f' => 'failed',
'i' => 'incomplete',
'b' => 'browsed',
'n' => 'notattempted'
);
$i=0;
while ($i<strlen($prerequisites)) {
$symbol = $prerequisites[$i];
switch ($symbol) {
case '&':
case '|':
$symbol .= $symbol;
case '~':
case '(':
case ')':
case '*':
//case '{':
//case '}':
//case ',':
$element = trim($element);
if (!empty($element)) {
$element = trim($element);
if (isset($usertracks[$element])) {
$element = '((\''.$usertracks[$element]->status.'\' == \'completed\') || '.
'(\''.$usertracks[$element]->status.'\' == \'passed\'))';
} else if (($operator = strpos($element,'=')) !== false) {
$item = trim(substr($element,0,$operator));
if (!isset($usertracks[$item])) {
return false;
}
$value = trim(trim(substr($element,$operator+1)),'"');
if (isset($statuses[$value])) {
$status = $statuses[$value];
} else {
return false;
}
$element = '(\''.$usertracks[$item]->status.'\' == \''.$status.'\')';
} else if (($operator = strpos($element,'<>')) !== false) {
$item = trim(substr($element,0,$operator));
if (!isset($usertracks[$item])) {
return false;
}
$value = trim(trim(substr($element,$operator+2)),'"');
if (isset($statuses[$value])) {
$status = $statuses[$value];
} else {
return false;
}
$element = '(\''.$usertracks[$item]->status.'\' != \''.$status.'\')';
} else if (is_numeric($element)) {
if ($symbol == '*') {
$symbol = '';
$open = strpos($prerequisites,'{',$i);
$opened = 1;
$closed = 0;
for ($close=$open+1; (($opened > $closed) && ($close<strlen($prerequisites))); $close++) {
if ($prerequisites[$close] == '}') {
$closed++;
} else if ($prerequisites[$close] == '{') {
$opened++;
}
}
$i = $close;
$setelements = explode(',', substr($prerequisites, $open+1, $close-($open+1)-1));
$settrue = 0;
foreach ($setelements as $setelement) {
if (scorm_eval_prerequisites($setelement,$usertracks)) {
$settrue++;
}
}
if ($settrue >= $element) {
$element = 'true';
} else {
$element = 'false';
}
}
} else {
return false;
}
array_push($stack,$element);
$element = '';
}
if ($symbol == '~') {
$symbol = '!';
}
if (!empty($symbol)) {
array_push($stack,$symbol);
}
break;
default:
$element .= $symbol;
break;
}
$i++;
}
if (!empty($element)) {
$element = trim($element);
if (isset($usertracks[$element])) {
$element = '((\''.$usertracks[$element]->status.'\' == \'completed\') || '.
'(\''.$usertracks[$element]->status.'\' == \'passed\'))';
} else if (($operator = strpos($element,'=')) !== false) {
$item = trim(substr($element,0,$operator));
if (!isset($usertracks[$item])) {
return false;
}
$value = trim(trim(substr($element,$operator+1)),'"');
if (isset($statuses[$value])) {
$status = $statuses[$value];
} else {
return false;
}
$element = '(\''.$usertracks[$item]->status.'\' == \''.$status.'\')';
} else if (($operator = strpos($element,'<>')) !== false) {
$item = trim(substr($element,0,$operator));
if (!isset($usertracks[$item])) {
return false;
}
$value = trim(trim(substr($element,$operator+1)),'"');
if (isset($statuses[$value])) {
$status = $statuses[$value];
} else {
return false;
}
$element = '(\''.$usertracks[$item]->status.'\' != \''.trim($status).'\')';
} else {
return false;
}
array_push($stack,$element);
}
return eval('return '.implode($stack).';');
}
function scorm_insert_track($userid,$scormid,$scoid,$attempt,$element,$value) {
$id = null;
if ($track = get_record_select('scorm_scoes_track',"userid='$userid' AND scormid='$scormid' AND scoid='$scoid' AND attempt='$attempt' AND element='$element'")) {
$track->value = $value;
$track->timemodified = time();
$id = update_record('scorm_scoes_track',$track);
} else {
$track->userid = $userid;
$track->scormid = $scormid;
$track->scoid = $scoid;
$track->attempt = $attempt;
$track->element = $element;
$track->value = addslashes($value);
$track->timemodified = time();
$id = insert_record('scorm_scoes_track',$track);
}
return $id;
}
function scorm_add_time($a, $b) {
$aes = explode(':',$a);
$bes = explode(':',$b);
$aseconds = explode('.',$aes[2]);
$bseconds = explode('.',$bes[2]);
$change = 0;
$acents = 0; //Cents
if (count($aseconds) > 1) {
$acents = $aseconds[1];
}
$bcents = 0;
if (count($bseconds) > 1) {
$bcents = $bseconds[1];
}
$cents = $acents + $bcents;
$change = floor($cents / 100);
$cents = $cents - ($change * 100);
if (floor($cents) < 10) {
$cents = '0'. $cents;
}
$secs = $aseconds[0] + $bseconds[0] + $change; //Seconds
$change = floor($secs / 60);
$secs = $secs - ($change * 60);
if (floor($secs) < 10) {
$secs = '0'. $secs;
}
$mins = $aes[1] + $bes[1] + $change; //Minutes
$change = floor($mins / 60);
$mins = $mins - ($change * 60);
if ($mins < 10) {
$mins = '0' . $mins;
}
$hours = $aes[0] + $bes[0] + $change; //Hours
if ($hours < 10) {
$hours = '0' . $hours;
}
if ($cents != '0') {
return $hours . ":" . $mins . ":" . $secs . '.' . $cents;
} else {
return $hours . ":" . $mins . ":" . $secs;
}
}
function scorm_external_link($link) {
// check if a link is external
$result = false;
$link = strtolower($link);
if (substr($link,0,7) == 'http://') {
$result = true;
} else if (substr($link,0,8) == 'https://') {
$result = true;
} else if (substr($link,0,4) == 'www.') {
$result = true;
}
return $result;
}
function scorm_grade_user($scoes, $userid, $grademethod=VALUESCOES) {
$scores = NULL;
$scores->scoes = 0;
$scores->values = 0;
$scores->max = 0;
$scores->sum = 0;
if (!$scoes) {
return '';
}
$current = current($scoes);
$attempt = scorm_get_last_attempt($current->scorm, $userid);
foreach ($scoes as $sco) {
if ($userdata=scorm_get_tracks($sco->id, $userid,$attempt)) {
if (($userdata->status == 'completed') || ($userdata->status == 'passed')) {
$scores->scoes++;
}
if (!empty($userdata->score_raw)) {
$scores->values++;
$scores->sum += $userdata->score_raw;
$scores->max = ($userdata->score_raw > $scores->max)?$userdata->score_raw:$scores->max;
}
}
}
switch ($grademethod) {
case VALUEHIGHEST:
return $scores->max;
break;
case VALUEAVERAGE:
if ($scores->values > 0) {
return $scores->sum/$scores->values;
} else {
return 0;
}
break;
case VALUESUM:
return $scores->sum;
break;
case VALUESCOES:
return $scores->scoes;
break;
}
}
function scorm_count_launchable($scormid,$organization) {
return count_records_select('scorm_scoes',"scorm=$scormid AND organization='$organization' AND launch<>''");
}
function scorm_get_toc($user,$scorm,$liststyle,$currentorg='',$scoid='',$mode='normal',$attempt='',$play=false) {
global $CFG;
$strexpand = get_string('expcoll','scorm');
$modestr = '';
if ($mode == 'browse') {
$modestr = '&amp;mode='.$mode;
}
$scormpixdir = $CFG->modpixpath.'/scorm/pix';
$result = new stdClass();
$result->toc = "<ul id='0' class='$liststyle'>\n";
$tocmenus = array();
$result->prerequisites = true;
$incomplete = false;
//
// Get the current organization infos
//
$organizationsql = '';
if (!empty($currentorg)) {
if (($organizationtitle = get_field('scorm_scoes','title','scorm',$scorm->id,'identifier',$currentorg)) != '') {
$result->toc .= "\t<li>$organizationtitle</li>\n";
$tocmenus[] = $organizationtitle;
}
$organizationsql = "AND organization='$currentorg'";
}
//
// If not specified retrieve the last attempt number
//
if (empty($attempt)) {
$attempt = scorm_get_last_attempt($scorm->id, $user->id);
}
$result->attemptleft = $scorm->maxattempt - $attempt;
if ($scoes = get_records_select('scorm_scoes',"scorm='$scorm->id' $organizationsql order by id ASC")){
//
// Retrieve user tracking data for each learning object
//
$usertracks = array();
foreach ($scoes as $sco) {
if (!empty($sco->launch)) {
if ($usertrack=scorm_get_tracks($sco->id,$user->id,$attempt)) {
if ($usertrack->status == '') {
$usertrack->status = 'notattempted';
}
$usertracks[$sco->identifier] = $usertrack;
}
}
}
$level=0;
$sublist=1;
$previd = 0;
$nextid = 0;
$findnext = false;
$parents[$level]='/';
foreach ($scoes as $sco) {
if ($parents[$level]!=$sco->parent) {
if ($newlevel = array_search($sco->parent,$parents)) {
for ($i=0; $i<($level-$newlevel); $i++) {
$result->toc .= "\t\t</ul></li>\n";
}
$level = $newlevel;
} else {
$i = $level;
$closelist = '';
while (($i > 0) && ($parents[$level] != $sco->parent)) {
$closelist .= "\t\t</ul></li>\n";
$i--;
}
if (($i == 0) && ($sco->parent != $currentorg)) {
$result->toc .= "\t\t<li><ul id='$sublist' class='$liststyle'>\n";
$level++;
} else {
$result->toc .= $closelist;
$level = $i;
}
$parents[$level]=$sco->parent;
}
}
$result->toc .= "\t\t<li>";
$nextsco = next($scoes);
if (($nextsco !== false) && ($sco->parent != $nextsco->parent) && (($level==0) || (($level>0) && ($nextsco->parent == $sco->identifier)))) {
$sublist++;
$result->toc .= '<a href="javascript:expandCollide(img'.$sublist.','.$sublist.');"><img id="img'.$sublist.'" src="'.$scormpixdir.'/minus.gif" alt="'.$strexpand.'" title="'.$strexpand.'"/></a>';
} else {
$result->toc .= '<img src="'.$scormpixdir.'/spacer.gif" />';
}
if (empty($sco->title)) {
$sco->title = $sco->identifier;
}
if (!empty($sco->launch)) {
$startbold = '';
$endbold = '';
$score = '';
if (empty($scoid) && ($mode != 'normal')) {
$scoid = $sco->id;
}
if (isset($usertracks[$sco->identifier])) {
$usertrack = $usertracks[$sco->identifier];
$strstatus = get_string($usertrack->status,'scorm');
$result->toc .= '<img src="'.$scormpixdir.'/'.$usertrack->status.'.gif" alt="'.$strstatus.'" title="'.$strstatus.'" />';
if (($usertrack->status == 'notattempted') || ($usertrack->status == 'incomplete') || ($usertrack->status == 'browsed')) {
$incomplete = true;
if ($play && empty($scoid)) {
$scoid = $sco->id;
}
}
if ($usertrack->score_raw != '') {
$score = '('.get_string('score','scorm').':&nbsp;'.$usertrack->score_raw.')';
}
} else {
if ($play && empty($scoid)) {
$scoid = $sco->id;
}
if ($sco->scormtype == 'sco') {
$result->toc .= '<img src="'.$scormpixdir.'/notattempted.gif" alt="'.get_string('notattempted','scorm').'" title="'.get_string('notattempted','scorm').'" />';
$incomplete = true;
} else {
$result->toc .= '<img src="'.$scormpixdir.'/asset.gif" alt="'.get_string('asset','scorm').'" title="'.get_string('asset','scorm').'" />';
}
}
if ($sco->id == $scoid) {
$startbold = '<b>';
$endbold = '</b>';
$findnext = true;
$shownext = $sco->next;
$showprev = $sco->previous;
}
if (($nextid == 0) && (scorm_count_launchable($scorm->id,$currentorg) > 1) && ($nextsco!==false) && (!$findnext)) {
if (!empty($sco->launch)) {
$previd = $sco->id;
}
}
if (empty($sco->prerequisites) || scorm_eval_prerequisites($sco->prerequisites,$usertracks)) {
if ($sco->id == $scoid) {
$result->prerequisites = true;
}
$url = $CFG->wwwroot.'/mod/scorm/player.php?a='.$scorm->id.'&amp;currentorg='.$currentorg.$modestr.'&amp;scoid='.$sco->id;
$result->toc .= '&nbsp'.$startbold.'<a href="'.$url.'">'.format_string($sco->title).'</a>'.$score.$endbold."</li>\n";
$tocmenus[$sco->id] = scorm_repeater('&minus;',$level) . '&gt;' . format_string($sco->title);
} else {
if ($sco->id == $scoid) {
$result->prerequisites = false;
}
$result->toc .= '&nbsp;'.$sco->title."</li>\n";
}
} else {
$result->toc .= '&nbsp;'.$sco->title."</li>\n";
}
if (($nextsco !== false) && ($nextid == 0) && ($findnext)) {
if (!empty($nextsco->launch)) {
$nextid = $nextsco->id;
}
}
}
for ($i=0;$i<$level;$i++) {
$result->toc .= "\t\t</ul></li>\n";
}
if ($play) {
$sco = get_record('scorm_scoes','id',$scoid);
$sco->previd = $previd;
$sco->nextid = $nextid;
$result->sco = $sco;
$result->incomplete = $incomplete;
} else {
$result->incomplete = $incomplete;
}
}
$result->toc .= "\t</ul>\n";
if ($scorm->hidetoc == 0) {
$result->toc .= '
<script language="javascript" type="text/javascript">
<!--
function expandCollide(which,list) {
var nn=document.ids?true:false
var w3c=document.getElementById?true:false
var beg=nn?"document.ids.":w3c?"document.getElementById(":"document.all.";
var mid=w3c?").style":".style";
if (eval(beg+list+mid+".display") != "none") {
which.src = "'.$scormpixdir.'/plus.gif";
eval(beg+list+mid+".display=\'none\';");
} else {
which.src = "'.$scormpixdir.'/minus.gif";
eval(beg+list+mid+".display=\'block\';");
}
}
-->
</script>'."\n";
}
$url = $CFG->wwwroot.'/mod/scorm/player.php?a='.$scorm->id.'&amp;currentorg='.$currentorg.$modestr.'&amp;scoid=';
$result->tocmenu = popup_form($url,$tocmenus, "tocmenu", $sco->id, '', '', '', true);
return $result;
}
function scorm_get_last_attempt($scormid, $userid) {
/// Find the last attempt number for the given user id and scorm id
if ($lastattempt = get_record('scorm_scoes_track', 'userid', $userid, 'scormid', $scormid, '', '', 'max(attempt) as a')) {
if (empty($lastattempt->a)) {
return '1';
} else {
return $lastattempt->a;
}
}
}
function scorm_get_tracks($scoid,$userid,$attempt='') {
/// Gets all tracks of specified sco and user
global $CFG;
if (empty($attempt)) {
if ($scormid = get_field('scorm_scoes','scorm','id',$scoid)) {
$attempt = scorm_get_last_attempt($scormid,$userid);
} else {
$attempt = 1;
}
}
$attemptsql = ' AND attempt=' . $attempt;
if ($tracks = get_records_select('scorm_scoes_track',"userid=$userid AND scoid=$scoid".$attemptsql,'element ASC')) {
$usertrack->userid = $userid;
$usertrack->scoid = $scoid;
$usertrack->score_raw = '';
$usertrack->status = '';
$usertrack->total_time = '00:00:00';
$usertrack->session_time = '00:00:00';
$usertrack->timemodified = 0;
foreach ($tracks as $track) {
$element = $track->element;
$usertrack->{$element} = $track->value;
switch ($element) {
case 'cmi.core.lesson_status':
case 'cmi.completion_status':
if ($track->value == 'not attempted') {
$track->value = 'notattempted';
}
$usertrack->status = $track->value;
break;
case 'cmi.core.score.raw':
case 'cmi.score.raw':
$usertrack->score_raw = $track->value;
break;
case 'cmi.core.session_time':
case 'cmi.session_time':
$usertrack->session_time = $track->value;
break;
case 'cmi.core.total_time':
case 'cmi.total_time':
$usertrack->total_time = $track->value;
break;
}
if (isset($track->timemodified) && ($track->timemodified > $usertrack->timemodified)) {
$usertrack->timemodified = $track->timemodified;
}
}
return $usertrack;
} else {
return false;
}
}
/// Library of functions and constants for parsing packages
function scorm_parse($scorm) {
global $CFG;
// Parse scorm manifest
if ($scorm->pkgtype == 'AICC') {
$scorm->launch = scorm_parse_aicc($scorm->dir.'/'.$scorm->id,$scorm->id);
} else {
if (basename($scorm->reference) != 'imsmanifest.xml') {
$scorm->launch = scorm_parse_scorm($scorm->dir.'/'.$scorm->id,$scorm->id);
} else {
$scorm->launch = scorm_parse_scorm($CFG->dataroot.'/'.$scorm->course.'/'.dirname($scorm->reference),$scorm->id);
}
}
return $scorm->launch;
}
/**
* Take the header row of an AICC definition file
* and returns sequence of columns and a pointer to
* the sco identifier column.
*
* @param string $row AICC header row
* @param string $mastername AICC sco identifier column
* @return mixed
*/
function scorm_get_aicc_columns($row,$mastername='system_id') {
$tok = strtok(strtolower($row),"\",\n\r");
$result->columns = array();
$i=0;
while ($tok) {
if ($tok !='') {
$result->columns[] = $tok;
if ($tok == $mastername) {
$result->mastercol = $i;
}
$i++;
}
$tok = strtok("\",\n\r");
}
return $result;
}
/**
* Given a colums array return a string containing the regular
* expression to match the columns in a text row.
*
* @param array $column The header columns
* @param string $remodule The regular expression module for a single column
* @return string
*/
function scorm_forge_cols_regexp($columns,$remodule='(".*")?,') {
$regexp = '/^';
foreach ($columns as $column) {
$regexp .= $remodule;
}
if (substr($regexp,-1) == ',') {
$regexp = substr($regexp,0,-1);
}
$regexp .= '/';
return $regexp;
}
function scorm_parse_aicc($pkgdir,$scormid){
$version = 'AICC';
$ids = array();
$courses = array();
if ($handle = opendir($pkgdir)) {
while (($file = readdir($handle)) !== false) {
$ext = substr($file,strrpos($file,'.'));
$extension = strtolower(substr($ext,1));
$id = strtolower(basename($file,$ext));
$ids[$id]->$extension = $file;
}
closedir($handle);
}
foreach ($ids as $courseid => $id) {
if (isset($id->crs)) {
if (is_file($pkgdir.'/'.$id->crs)) {
$rows = file($pkgdir.'/'.$id->crs);
foreach ($rows as $row) {
if (preg_match("/^(.+)=(.+)$/",$row,$matches)) {
switch (strtolower(trim($matches[1]))) {
case 'course_id':
$courses[$courseid]->id = trim($matches[2]);
break;
case 'course_title':
$courses[$courseid]->title = trim($matches[2]);
break;
case 'version':
$courses[$courseid]->version = 'AICC_'.trim($matches[2]);
break;
}
}
}
}
}
if (isset($id->des)) {
$rows = file($pkgdir.'/'.$id->des);
$columns = scorm_get_aicc_columns($rows[0]);
$regexp = scorm_forge_cols_regexp($columns->columns);
for ($i=1;$i<count($rows);$i++) {
if (preg_match($regexp,$rows[$i],$matches)) {
for ($j=0;$j<count($matches)-1;$j++) {
$column = $columns->columns[$j];
$courses[$courseid]->elements[substr(trim($matches[$columns->mastercol+1]),1,-1)]->$column = substr(trim($matches[$j+1]),1,-1);
}
}
}
}
if (isset($id->au)) {
$rows = file($pkgdir.'/'.$id->au);
$columns = scorm_get_aicc_columns($rows[0]);
$regexp = scorm_forge_cols_regexp($columns->columns);
for ($i=1;$i<count($rows);$i++) {
if (preg_match($regexp,$rows[$i],$matches)) {
for ($j=0;$j<count($matches)-1;$j++) {
$column = $columns->columns[$j];
$courses[$courseid]->elements[substr(trim($matches[$columns->mastercol+1]),1,-1)]->$column = substr(trim($matches[$j+1]),1,-1);
}
}
}
}
if (isset($id->cst)) {
$rows = file($pkgdir.'/'.$id->cst);
$columns = scorm_get_aicc_columns($rows[0],'block');
$regexp = scorm_forge_cols_regexp($columns->columns,'("[\w]+")?,?');
for ($i=1;$i<count($rows);$i++) {
if (preg_match($regexp,$rows[$i],$matches)) {
for ($j=0;$j<count($matches)-1;$j++) {
if ($j != $columns->mastercol) {
$courses[$courseid]->elements[substr(trim($matches[$j+1]),1,-1)]->parent = substr(trim($matches[$columns->mastercol+1]),1,-1);
}
}
}
}
}
if (isset($id->ort)) {
$rows = file($pkgdir.'/'.$id->ort);
}
if (isset($id->pre)) {
$rows = file($pkgdir.'/'.$id->pre);
$columns = scorm_get_aicc_columns($rows[0],'structure_element');
$regexp = scorm_forge_cols_regexp($columns->columns,'(.+),');
for ($i=1;$i<count($rows);$i++) {
if (preg_match($regexp,$rows[$i],$matches)) {
$courses[$courseid]->elements[$columns->mastercol+1]->prerequisites = substr(trim($matches[1-$columns->mastercol+1]),1,-1);
}
}
}
if (isset($id->cmp)) {
$rows = file($pkgdir.'/'.$id->cmp);
}
}
//print_r($courses);
$launch = 0;
if (isset($courses)) {
foreach ($courses as $course) {
unset($sco);
$sco->identifier = $course->id;
$sco->scorm = $scormid;
$sco->organization = '';
$sco->title = $course->title;
$sco->parent = '/';
$sco->launch = '';
$sco->scormtype = '';
//print_r($sco);
$id = insert_record('scorm_scoes',$sco);
if ($launch == 0) {
$launch = $id;
}
if (isset($course->elements)) {
foreach($course->elements as $element) {
unset($sco);
$sco->identifier = $element->system_id;
$sco->scorm = $scormid;
$sco->organization = $course->id;
$sco->title = $element->title;
if (strtolower($element->parent) == 'root') {
$sco->parent = '/';
} else {
$sco->parent = $element->parent;
}
if (isset($element->file_name)) {
$sco->launch = $element->file_name;
$sco->scormtype = 'sco';
} else {
$element->file_name = '';
$sco->scormtype = '';
}
if (!isset($element->prerequisites)) {
$element->prerequisites = '';
}
$sco->prerequisites = $element->prerequisites;
if (!isset($element->max_time_allowed)) {
$element->max_time_allowed = '';
}
$sco->maxtimeallowed = $element->max_time_allowed;
if (!isset($element->time_limit_action)) {
$element->time_limit_action = '';
}
$sco->timelimitaction = $element->time_limit_action;
if (!isset($element->mastery_score)) {
$element->mastery_score = '';
}
$sco->masteryscore = $element->mastery_score;
$sco->previous = 0;
$sco->next = 0;
$id = insert_record('scorm_scoes',$sco);
if ($launch==0) {
$launch = $id;
}
}
}
}
}
set_field('scorm','version','AICC','id',$scormid);
return $launch;
}
function scorm_get_resources($blocks) {
foreach ($blocks as $block) {
if ($block['name'] == 'RESOURCES') {
foreach ($block['children'] as $resource) {
if ($resource['name'] == 'RESOURCE') {
$resources[addslashes($resource['attrs']['IDENTIFIER'])] = $resource['attrs'];
}
}
}
}
return $resources;
}
function scorm_get_manifest($blocks,$scoes) {
static $parents = array();
static $resources;
static $manifest;
static $organization;
if (count($blocks) > 0) {
foreach ($blocks as $block) {
switch ($block['name']) {
case 'METADATA':
if (isset($block['children'])) {
foreach ($block['children'] as $metadata) {
if ($metadata['name'] == 'SCHEMAVERSION') {
if (empty($scoes->version)) {
if (isset($metadata['tagData']) && (preg_match("/^(1\.2)$|^(CAM )?(1\.3)$/",$metadata['tagData'],$matches))) {
$scoes->version = 'SCORM_'.$matches[count($matches)-1];
} else {
$scoes->version = 'SCORM_1.2';
}
}
}
}
}
break;
case 'MANIFEST':
$manifest = addslashes($block['attrs']['IDENTIFIER']);
$organization = '';
$resources = array();
$resources = scorm_get_resources($block['children']);
$scoes = scorm_get_manifest($block['children'],$scoes);
if (count($scoes->elements) <= 0) {
foreach ($resources as $item => $resource) {
if (!empty($resource['HREF'])) {
$sco = new stdClass();
$sco->identifier = $item;
$sco->title = $item;
$sco->parent = '/';
$sco->launch = addslashes($resource['HREF']);
$sco->scormtype = addslashes($resource['ADLCP:SCORMTYPE']);
$scoes->elements[$manifest][$organization][$item] = $sco;
}
}
}
break;
case 'ORGANIZATIONS':
if (!isset($scoes->defaultorg)) {
$scoes->defaultorg = addslashes($block['attrs']['DEFAULT']);
}
$scoes = scorm_get_manifest($block['children'],$scoes);
break;
case 'ORGANIZATION':
$identifier = addslashes($block['attrs']['IDENTIFIER']);
$organization = '';
$scoes->elements[$manifest][$organization][$identifier]->identifier = $identifier;
$scoes->elements[$manifest][$organization][$identifier]->parent = '/';
$scoes->elements[$manifest][$organization][$identifier]->launch = '';
$scoes->elements[$manifest][$organization][$identifier]->scormtype = '';
$parents = array();
$parent = new stdClass();
$parent->identifier = $identifier;
$parent->organization = $organization;
array_push($parents, $parent);
$organization = $identifier;
$scoes = scorm_get_manifest($block['children'],$scoes);
array_pop($parents);
break;
case 'ITEM':
$parent = array_pop($parents);
array_push($parents, $parent);
$identifier = addslashes($block['attrs']['IDENTIFIER']);
$scoes->elements[$manifest][$organization][$identifier]->identifier = $identifier;
$scoes->elements[$manifest][$organization][$identifier]->parent = $parent->identifier;
if (!isset($block['attrs']['ISVISIBLE'])) {
$block['attrs']['ISVISIBLE'] = 'true';
}
$scoes->elements[$manifest][$organization][$identifier]->isvisible = addslashes($block['attrs']['ISVISIBLE']);
if (!isset($block['attrs']['PARAMETERS'])) {
$block['attrs']['PARAMETERS'] = '';
}
$scoes->elements[$manifest][$organization][$identifier]->parameters = addslashes($block['attrs']['PARAMETERS']);
if (!isset($block['attrs']['IDENTIFIERREF'])) {
$scoes->elements[$manifest][$organization][$identifier]->launch = '';
$scoes->elements[$manifest][$organization][$identifier]->scormtype = 'asset';
} else {
$idref = addslashes($block['attrs']['IDENTIFIERREF']);
$base = '';
if (isset($resources[$idref]['XML:BASE'])) {
$base = $resources[$idref]['XML:BASE'];
}
$scoes->elements[$manifest][$organization][$identifier]->launch = addslashes($base.$resources[$idref]['HREF']);
if (empty($resources[$idref]['ADLCP:SCORMTYPE'])) {
$resources[$idref]['ADLCP:SCORMTYPE'] = 'asset';
}
$scoes->elements[$manifest][$organization][$identifier]->scormtype = addslashes($resources[$idref]['ADLCP:SCORMTYPE']);
}
$parent = new stdClass();
$parent->identifier = $identifier;
$parent->organization = $organization;
array_push($parents, $parent);
$scoes = scorm_get_manifest($block['children'],$scoes);
array_pop($parents);
break;
case 'TITLE':
$parent = array_pop($parents);
array_push($parents, $parent);
if (!isset($block['tagData'])) {
$block['tagData'] = '';
}
$scoes->elements[$manifest][$parent->organization][$parent->identifier]->title = addslashes($block['tagData']);
break;
case 'ADLCP:PREREQUISITES':
if ($block['attrs']['TYPE'] == 'aicc_script') {
$parent = array_pop($parents);
array_push($parents, $parent);
if (!isset($block['tagData'])) {
$block['tagData'] = '';
}
$scoes->elements[$manifest][$parent->organization][$parent->identifier]->prerequisites = addslashes($block['tagData']);
}
break;
case 'ADLCP:MAXTIMEALLOWED':
$parent = array_pop($parents);
array_push($parents, $parent);
if (!isset($block['tagData'])) {
$block['tagData'] = '';
}
$scoes->elements[$manifest][$parent->organization][$parent->identifier]->maxtimeallowed = addslashes($block['tagData']);
break;
case 'ADLCP:TIMELIMITACTION':
$parent = array_pop($parents);
array_push($parents, $parent);
if (!isset($block['tagData'])) {
$block['tagData'] = '';
}
$scoes->elements[$manifest][$parent->organization][$parent->identifier]->timelimitaction = addslashes($block['tagData']);
break;
case 'ADLCP:DATAFROMLMS':
$parent = array_pop($parents);
array_push($parents, $parent);
if (!isset($block['tagData'])) {
$block['tagData'] = '';
}
$scoes->elements[$manifest][$parent->organization][$parent->identifier]->datafromlms = addslashes($block['tagData']);
break;
case 'ADLCP:MASTERYSCORE':
$parent = array_pop($parents);
array_push($parents, $parent);
if (!isset($block['tagData'])) {
$block['tagData'] = '';
}
$scoes->elements[$manifest][$parent->organization][$parent->identifier]->masteryscore = addslashes($block['tagData']);
break;
}
}
}
return $scoes;
}
function scorm_parse_scorm($pkgdir,$scormid) {
global $CFG;
$launch = 0;
$manifestfile = $pkgdir.'/imsmanifest.xml';
if (is_file($manifestfile)) {
$xmlstring = file_get_contents($manifestfile);
$objXML = new xml2Array();
$manifests = $objXML->parse($xmlstring);
$scoes = new stdClass();
$scoes->version = '';
$scoes = scorm_get_manifest($manifests,$scoes);
if (count($scoes->elements) > 0) {
foreach ($scoes->elements as $manifest => $organizations) {
foreach ($organizations as $organization => $items) {
foreach ($items as $identifier => $item) {
$item->scorm = $scormid;
$item->manifest = $manifest;
$item->organization = $organization;
$id = insert_record('scorm_scoes',$item);
if (($launch == 0) && ((empty($scoes->defaultorg)) || ($scoes->defaultorg == $identifier))) {
$launch = $id;
}
}
}
}
set_field('scorm','version',$scoes->version,'id',$scormid);
}
}
return $launch;
}
function scorm_course_format_display($user,$course) {
global $CFG;
$strupdate = get_string('update');
$strmodule = get_string('modulename','scorm');
echo '<div class="mod-scorm">';
if ($scorms = get_all_instances_in_course('scorm', $course)) {
// The module SCORM activity with the least id is the course
$scorm = current($scorms);
if (! $cm = get_coursemodule_from_instance('scorm', $scorm->id, $course->id)) {
error("Course Module ID was incorrect");
}
$colspan = '';
$headertext = '<table width="100%"><tr><td class="title">'.get_string('name').': <b>'.format_string($scorm->name).'</b>';
if (isteacher($course->id, $user->id, true)) {
if (isediting($course->id)) {
// Display update icon
$path = $CFG->wwwroot.'/course';
$headertext .= '<span class="commands">'.
'<a title="'.$strupdate.'" href="'.$path.'/mod.php?update='.$cm->id.'&amp;sesskey='.sesskey().'">'.
'<img src="'.$CFG->pixpath.'/t/edit.gif" hspace="2" height="11" width="11" border="0" alt="'.$strupdate.'" /></a></span>';
}
$headertext .= '</td>';
// Display report link
$trackedusers = get_record('scorm_scoes_track', 'scormid', $scorm->id, '', '', '', '', 'count(distinct(userid)) as c');
if ($trackedusers->c > 0) {
$headertext .= '<td class="reportlink">'.
'<a target="'.$CFG->framename.'" href="'.$CFG->wwwroot.'/mod/scorm/report.php?id='.$cm->id.'">'.
get_string('viewallreports','scorm',$trackedusers->c).'</a>';
} else {
$headertext .= '<td class="reportlink">'.get_string('noreports','scorm');
}
$colspan = ' colspan="2"';
}
$headertext .= '</td></tr><tr><td'.$colspan.'>'.format_text(get_string('summary').':<br />'.$scorm->summary).'</td></tr></table>';
print_simple_box($headertext,'','100%');
scorm_view_display($user, $scorm, 'view.php?id='.$course->id, $cm, '100%');
} else {
if (isteacheredit($course->id, $user->id)) {
// Create a new activity
redirect('mod.php?id='.$course->id.'&amp;section=0&sesskey='.sesskey().'&amp;add=scorm');
} else {
notify('Could not find a scorm course here');
}
}
echo '</div>';
}
function scorm_view_display ($user, $scorm, $action, $cm, $blockwidth='') {
global $CFG;
$organization = optional_param('organization', '', PARAM_INT);
print_simple_box_start('center',$blockwidth);
?>
<div class="structurehead"><?php print_string('coursestruct','scorm') ?></div>
<?php
if (empty($organization)) {
$organization = $scorm->launch;
}
if ($orgs = get_records_select_menu('scorm_scoes',"scorm='$scorm->id' AND organization='' AND launch=''",'id','id,title')) {
if (count($orgs) > 1) {
?>
<div class='center'>
<?php print_string('organizations','scorm') ?>
<form name='changeorg' method='post' action='<?php echo $action ?>'>
<?php choose_from_menu($orgs, 'organization', "$organization", '','submit()') ?>
</form>
</div>
<?php
}
}
$orgidentifier = '';
if ($org = get_record('scorm_scoes','id',$organization)) {
if (($org->organization == '') && ($org->launch == '')) {
$orgidentifier = $org->identifier;
} else {
$orgidentifier = $org->organization;
}
}
$result = scorm_get_toc($user,$scorm,'structlist',$orgidentifier);
$incomplete = $result->incomplete;
echo $result->toc;
print_simple_box_end();
?>
<div class="center">
<form name="theform" method="post" action="<?php echo $CFG->wwwroot ?>/mod/scorm/player.php?id=<?php echo $cm->id ?>"<?php echo $scorm->popup == 1?' target="newwin"':'' ?>>
<?php
if ($scorm->hidebrowse == 0) {
print_string("mode","scorm");
echo ': <input type="radio" id="b" name="mode" value="browse" /><label for="b">'.get_string('browse','scorm').'</label>'."\n";
if ($incomplete === true) {
echo '<input type="radio" id="n" name="mode" value="normal" checked="checked" /><label for="n">'.get_string('normal','scorm')."</label>\n";
} else {
echo '<input type="radio" id="r" name="mode" value="review" checked="checked" /><label for="r">'.get_string('review','scorm')."</label>\n";
}
} else {
if ($incomplete === true) {
echo '<input type="hidden" name="mode" value="normal" />'."\n";
} else {
echo '<input type="hidden" name="mode" value="review" />'."\n";
}
}
if (($incomplete === false) && (($result->attemptleft > 0)||($scorm->maxattempt == 0))) {
?>
<br />
<input type="checkbox" id="a" name="newattempt" />
<label for="a"><?php print_string('newattempt','scorm') ?></label>
<?php
}
?>
<br />
<input type="hidden" name="scoid" />
<input type="hidden" name="currentorg" value="<?php echo $orgidentifier ?>" />
<input type="submit" value="<?php print_string('entercourse','scorm') ?>" />
</form>
</div>
<?php
}
function scorm_repeater($what, $times) {
if ($times <= 0) {
return null;
}
$return = '';
for ($i=0; $i<$times;$i++) {
$return .= $what;
}
return $return;
}
/**
* Convert a utf-8 string to html entities
*
* @param string $str The UTF-8 string
* @return string
*/
function scorm_utf8_to_entities($str) {
global $CFG;
$entities = '';
$values = array();
$lookingfor = 1;
if (empty($CFG->unicodedb)) { // If Unicode DB support enable does not convert string
$textlib = textlib_get_instance();
for ($i = 0; $i < $textlib->strlen($str,'utf-8'); $i++) {
$thisvalue = ord($str[$i]);
if ($thisvalue < 128) {
$entities .= $str[$i]; // Leave ASCII chars unchanged
} else {
if (count($values) == 0) {
$lookingfor = ($thisvalue < 224) ? 2 : 3;
}
$values[] = $thisvalue;
if (count($values) == $lookingfor) {
$number = ($lookingfor == 3) ?
(($values[0] % 16) * 4096) + (($values[1] % 64) * 64) + ($values[2] % 64):
(($values[0] % 32) * 64) + ($values[1] % 64);
$entities .= '&#' . $number . ';';
$values = array();
$lookingfor = 1;
}
}
}
return $entities;
} else {
return $str;
}
}
/* Usage
Grab some XML data, either from a file, URL, etc. however you want. Assume storage in $strYourXML;
$objXML = new xml2Array();
$arrOutput = $objXML->parse($strYourXML);
print_r($arrOutput); //print it out, or do whatever!
*/
class xml2Array {
var $arrOutput = array();
var $resParser;
var $strXmlData;
/**
* Parse an XML text string and create an array tree that rapresent the XML structure
*
* @param string $strInputXML The XML string
* @return array
*/
function parse($strInputXML) {
/*if (($start = strpos($strInputXML,'encoding=')) !== false) {
$endchr = substr($strInputXML,$start+9,1);
if (($end = strpos($strInputXML,$endchr,$start+10)) !== false) {
$charset = strtolower(substr($strInputXML,$start+10,$end-$start-10));
if ($charset != 'utf-8') {
$strInputXML = str_ireplace('encoding='.$endchr.$charset.$endchr,'encoding='.$endchr.'UTF-8'.$endchr,$strInputXML);
$textlib = textlib_get_instance();
}
}
}*/
$this->resParser = xml_parser_create ('UTF-8');
xml_set_object($this->resParser,$this);
xml_set_element_handler($this->resParser, "tagOpen", "tagClosed");
xml_set_character_data_handler($this->resParser, "tagData");
$this->strXmlData = xml_parse($this->resParser,$strInputXML );
if(!$this->strXmlData) {
die(sprintf("XML error: %s at line %d",
xml_error_string(xml_get_error_code($this->resParser)),
xml_get_current_line_number($this->resParser)));
}
xml_parser_free($this->resParser);
return $this->arrOutput;
}
function tagOpen($parser, $name, $attrs) {
$tag=array("name"=>$name,"attrs"=>$attrs);
array_push($this->arrOutput,$tag);
}
function tagData($parser, $tagData) {
if(trim($tagData)) {
if(isset($this->arrOutput[count($this->arrOutput)-1]['tagData'])) {
$this->arrOutput[count($this->arrOutput)-1]['tagData'] .= scorm_utf8_to_entities($tagData);
} else {
$this->arrOutput[count($this->arrOutput)-1]['tagData'] = scorm_utf8_to_entities($tagData);
}
}
}
function tagClosed($parser, $name) {
$this->arrOutput[count($this->arrOutput)-2]['children'][] = $this->arrOutput[count($this->arrOutput)-1];
array_pop($this->arrOutput);
}
}
?>
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