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<?PHP // $Id$
/// Library of functions and constants for module scorm
/// (replace scorm with the name of your module and delete this line)
define('VALUESCOES', '0');
define('VALUEHIGHEST', '1');
define('VALUEAVERAGE', '2');
define('VALUESUM', '3');
$SCORM_GRADE_METHOD = array (VALUESCOES => get_string("gradescoes", "scorm"),
VALUEHIGHEST => get_string("gradehighest", "scorm"),
VALUEAVERAGE => get_string("gradeaverage", "scorm"),
VALUESUM => get_string("gradesum", "scorm"));
$SCORM_WINDOW_OPTIONS = array('resizable', 'scrollbars', 'status', 'height', 'width');
if (!isset($CFG->scorm_popup)) {
set_config('scorm_popup', '');
}
if (!isset($CFG->scorm_validate)) {
$scorm_validate = 'none';
//I've commented this out for Moodle 1.4, as I've seen errors in
//SCORM packages even though the actual package worked fine. -- Martin Dougiamas
//if (extension_loaded('domxml')) {
// $scorm_validate = 'domxml';
//}
//if (version_compare(phpversion(),'5.0.0','>=')) {
// $scorm_validate = 'php5';
//}
set_config('scorm_validate', $scorm_validate);
}
foreach ($SCORM_WINDOW_OPTIONS as $popupoption) {
$popupoption = "scorm_popup$popupoption";
if (!isset($CFG->$popupoption)) {
if ($popupoption == 'scorm_popupheight') {
set_config($popupoption, 450);
} else if ($popupoption == 'scorm_popupwidth') {
set_config($popupoption, 620);
} else {
set_config($popupoption, 'checked');
}
}
}
if (!isset($CFG->scorm_framesize)) {
set_config('scorm_framesize', 140);
}
function scorm_add_instance($scorm) {
/// Given an object containing all the necessary data,
/// (defined by the form in mod.html) this function
/// will create a new instance and return the id number
/// of the new instance.
$scorm->timemodified = time();
# May have to add extra stuff in here #
global $SCORM_WINDOW_OPTIONS;
$scorm->popup = '';
$optionlist = array();
foreach ($SCORM_WINDOW_OPTIONS as $option) {
if (isset($scorm->$option)) {
$optionlist[] = $option.'='.$scorm->$option;
}
}
$scorm->popup = implode(',', $optionlist);
if ($scorm->popup != '') {
$scorm->popup .= ',location=0,menubar=0,toolbar=0';
$scorm->auto = '0';
}
return insert_record('scorm', $scorm);
}
function scorm_update_instance($scorm) {
/// Given an object containing all the necessary data,
/// (defined by the form in mod.html) this function
/// will update an existing instance with new data.
$scorm->timemodified = time();
$scorm->id = $scorm->instance;
# May have to add extra stuff in here #
global $SCORM_WINDOW_OPTIONS;
$scorm->popup = '';
$optionlist = array();
foreach ($SCORM_WINDOW_OPTIONS as $option) {
if (isset($scorm->$option)) {
$optionlist[] = $option.'='.$scorm->$option;
}
}
$scorm->popup = implode(',', $optionlist);
if ($scorm->popup != '') {
$scorm->popup .= ',location=0,menubar=0,toolbar=0';
$scorm->auto = '0';
}
return update_record('scorm', $scorm);
}
function scorm_delete_instance($id) {
/// Given an ID of an instance of this module,
/// this function will permanently delete the instance
/// and any data that depends on it.
require('../config.php');
if (! $scorm = get_record('scorm', 'id', $id)) {
return false;
}
$result = true;
# Delete any dependent files #
scorm_delete_files($CFG->dataroot.'/'.$scorm->course.'/moddata/scorm'.$scorm->datadir);
# Delete any dependent records here #
if (! delete_records('scorm_sco_users', 'scormid', $scorm->id)) {
$result = false;
}
if (! delete_records('scorm_scoes', 'scorm', $scorm->id)) {
$result = false;
}
if (! delete_records('scorm', 'id', $scorm->id)) {
$result = false;
}
return $result;
}
function scorm_user_outline($course, $user, $mod, $scorm) {
/// Return a small object with summary information about what a
/// user has done with a given particular instance of this module
/// Used for user activity reports.
/// $return->time = the time they did it
/// $return->info = a short text description
return $return;
}
function scorm_user_complete($course, $user, $mod, $scorm) {
/// Print a detailed representation of what a user has done with
/// a given particular instance of this module, for user activity reports.
return true;
}
function scorm_print_recent_activity(&$logs, $isteacher=false) {
/// Given a list of logs, assumed to be those since the last login
/// this function prints a short list of changes related to this module
/// If isteacher is true then perhaps additional information is printed.
/// This function is called from course/lib.php: print_recent_activity()
global $CFG, $COURSE_TEACHER_COLOR;
$content = NULL;
return $content; // True if anything was printed, otherwise false
}
function scorm_cron () {
/// Function to be run periodically according to the moodle cron
/// This function searches for things that need to be done, such
/// as sending out mail, toggling flags etc ...
global $CFG;
return true;
}
function scorm_grades($scormid) {
/// Must return an array of grades for a given instance of this module,
/// indexed by user. It also returns a maximum allowed grade.
global $CFG;
if (!$scorm = get_record("scorm", "id", $scormid)) {
return NULL;
}
if ($scorm->grademethod == VALUESCOES) {
if (!$return->maxgrade = count_records_select('scorm_scoes',"scorm='$scormid' AND launch<>''")) {
return NULL;
}
$return->grades = NULL;
if ($sco_users=get_records_select('scorm_sco_users', "scormid='$scormid' GROUP BY userid")) {
foreach ($sco_users as $sco_user) {
$user_data=get_records_select('scorm_sco_users',"scormid='$scormid' AND userid='$sco_user->userid'");
$scores->completed=0;
$scores->browsed=0;
$scores->incomplete=0;
$scores->failed=0;
$scores->notattempted=0;
$result='';
$data = current($user_data);
foreach ($user_data as $data) {
if ($data->cmi_core_lesson_status=='passed')
$scores->completed++;
else
$scores->{scorm_remove_spaces($data->cmi_core_lesson_status)}++;
}
if ($scores->completed)
$result.="<img src=\"$CFG->wwwroot/mod/scorm/pix/completed.gif\" alt=\"".get_string('completed','scorm')."\" title=\"".get_string('completed','scorm')."\"> $scores->completed ";
if ($scores->incomplete)
$result.="<img src=\"$CFG->wwwroot/mod/scorm/pix/incomplete.gif\" alt=\"".get_string('incomplete','scorm')."\" title=\"".get_string('incomplete','scorm')."\"> $scores->incomplete ";
if ($scores->failed)
$result.="<img src=\"$CFG->wwwroot/mod/scorm/pix/failed.gif\" alt=\"".get_string('failed','scorm')."\" title=\"".get_string('failed','scorm')."\"> $scores->failed ";
if ($scores->browsed)
$result.="<img src=\"$CFG->wwwroot/mod/scorm/pix/browsed.gif\" alt=\"".get_string('browsed','scorm')."\" title=\"".get_string('browsed','scorm')."\"> $scores->browsed ";
if ($scores->notattempted)
$result.="<img src=\"$CFG->wwwroot/mod/scorm/pix/notattempted.gif\" alt=\"".get_string('notattempted','scorm')."\" title=\"".get_string('notattempted','scorm')."\"> $scores->notattempted ";
$return->grades[$sco_user->userid]=$result;
}
}
} else {
$grades = get_records_select("scorm_sco_users", "scormid=$scormid AND cmi_core_score_raw>0","","id,userid,cmi_core_score_raw");
//$grades = get_records_menu("scorm_sco_users", "scormid",$scormid,"","userid,cmi_core_score_raw");
$valutations = array();
foreach ($grades as $grade) {
if (!isset($valutations[$grade->userid])) {
if ($scorm->grademethod == VALUEAVERAGE) {
$values = array();
$values[$grade->userid]->grade = 0;
$values[$grade->userid]->values = 0;
}
$valutations[$grade->userid] = 0;
}
switch ($scorm->grademethod) {
case VALUEHIGHEST:
if ($grade->cmi_core_score_raw > $valutations[$grade->userid]) {
$valutations[$grade->userid] = $grade->cmi_core_score_raw;
}
break;
case VALUEAVERAGE:
$values[$grade->userid]->grade += $grade->cmi_core_score_raw;
$values[$grade->userid]->values++;
break;
case VALUESUM:
$valutations[$grade->userid] += $grade->cmi_core_score_raw;
break;
}
}
if ($scorm->grademethod == VALUEAVERAGE) {
foreach($values as $userid => $value) {
$valutations[$userid] = $value->grade/$value->values;
}
}
//print_r($grades);
$return->grades = $valutations;
$return->maxgrade = $scorm->maxgrade;
}
return $return;
}
//////////////////////////////////////////////////////////////////////////////////////
/// Any other scorm functions go here. Each of them must have a name that
/// starts with scorm_
function scorm_randstring($len = '8')
{
$rstring = NULL;
$lchar = '';
for($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));
}
$rstring .= $char;
$lchar = $char;
}
return $rstring;
}
function scorm_datadir($strPath, $existingdir='', $prefix = 'SCORM')
{
global $CFG;
if (($existingdir!='') && (is_dir($strPath.$existingdir)))
return $strPath.$existingdir;
if (is_dir($strPath)) {
do {
$datadir='/'.$prefix.scorm_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;
}
}
if ($CFG->scorm_validate == 'domxml') {
require_once('validatordomxml.php');
}
function scorm_validate($manifest)
{
global $CFG;
global $item_idref_array;
global $idres_array;
global $def_org_array;
global $id_org_array;
if (is_file ($manifest)) {
if (file_exists($manifest)) {
if ($CFG->scorm_validate == 'domxml') {
$manifest_string = file_get_contents($manifest);
/* Elimino i caratteri speciali di spaziatura e ritorno a capo dal file xml */
$spec = array('\n', '\r', '\t', '\0', '\x0B');
$content = str_replace($spec, '', $manifest_string);
if ($xmldoc = domxml_open_mem($content)) {
$root = $xmldoc->document_element();
if (!testRoot($root)) {
return 'syntax';
}
if (testNode($root)) {
// Nel corpo di questo if si controllano le corrispondenze fra gli attributi
// Nello Standard SCORM ad ogni attributo idRef di <item> deve corrispondere
// un attributo ID di <resource>
// Gli array degli attributi sono stati dichiarati globali in validator.php
// pertanto possono essere utilizzati direttamente all'interno di main.php
foreach($item_idref_array as $elem_it) {
if (array_search($elem_it, $idres_array) === false) {
return 'mismatch';
}
}
foreach($def_org_array as $elem_def) {
if (array_search($elem_it, $id_org_array) === false) {
return 'mismatch';
}
}
} else {
return 'badmanifest';
}
}
return 'regular';
} else {
return 'found';
}
}
} else {
return 'nomanifest';
}
}
function scorm_delete_files($directory)
{
if (is_dir($directory))
{
$handle=opendir($directory);
while (($file = readdir($handle)) != '')
{
if ($file != '.' && $file != '..')
{
if (!is_dir($directory.'/'.$file)) {
//chmod($directory.'/'.$file,0777);
unlink($directory.'/'.$file);
} else {
scorm_delete_files($directory.'/'.$file);
}
}
}
rmdir($directory);
}
}
function scorm_startElement($parser, $name, $attrs) {
global $scoes,$i,$resources,$parent,$level,$organization,$manifest,$defaultorg;
if ($name == 'ITEM') {
$i++;
$scoes[$i]['manifest'] = $manifest;
$scoes[$i]['organization'] = $organization;
$scoes[$i]['identifier'] = $attrs['IDENTIFIER'];
if (empty($attrs['IDENTIFIERREF']))
$attrs['IDENTIFIERREF'] = '';
$scoes[$i]['identifierref'] = $attrs['IDENTIFIERREF'];
if (empty($attrs['ISVISIBLE']))
$attrs['ISVISIBLE'] = '';
$scoes[$i]['isvisible'] = $attrs['ISVISIBLE'];
$scoes[$i]['parent'] = $parent[$level];
$level++;
$parent[$level] = $attrs['IDENTIFIER'];
}
if ($name == 'RESOURCE') {
if (!isset($attrs['HREF'])) {
$attrs['HREF'] = '';
}
$resources[$attrs['IDENTIFIER']]['href']=$attrs['HREF'];
if (!isset($attrs['ADLCP:SCORMTYPE'])) {
$attrs['ADLCP:SCORMTYPE'] = '';
}
$resources[$attrs['IDENTIFIER']]['type']=$attrs['ADLCP:SCORMTYPE'];
}
if ($name == 'ORGANIZATION') {
$i++;
$scoes[$i]['manifest'] = $manifest;
$scoes[$i]['organization'] = '';
$scoes[$i]['identifier'] = $attrs['IDENTIFIER'];
$scoes[$i]['identifierref'] = '';
$scoes[$i]['isvisible'] = '';
$scoes[$i]['parent'] = $parent[$level];
$level++;
$parent[$level] = $attrs['IDENTIFIER'];
$organization = $attrs['IDENTIFIER'];
}
if ($name == 'MANIFEST') {
$manifest = $attrs['IDENTIFIER'];
}
if ($name == 'ORGANIZATIONS') {
if (!isset($attrs['DEFAULT'])) {
$attrs['DEFAULT'] = '';
}
$defaultorg = $attrs['DEFAULT'];
}
}
function scorm_endElement($parser, $name) {
global $scoes,$i,$level,$datacontent,$navigation;
if ($name == 'ITEM') {
$level--;
}
//if ($name == 'TITLE' && $level>0) {
if ($name == 'TITLE') {
$scoes[$i]['title'] = $datacontent;
}
if ($name == 'ADLCP:HIDERTSUI') {
$scoes[$i][$datacontent] = 1;
}
if ($name == 'ADLCP:DATAFROMLMS') {
$scoes[$i]['datafromlms'] = $datacontent;
}
if ($name == 'ORGANIZATION') {
$organization = '';
$level--;
}
if ($name == 'MANIFEST') {
$manifest = '';
}
}
function scorm_characterData($parser, $data) {
global $datacontent;
$datacontent = $data;
}
function scorm_parse($basedir,$file,$scorm_id) {
global $scoes,$i,$resources,$parent,$level,$defaultorg;
$datacontent = '';
$scoes[][] = '';
$resources[] = '';
$organization = '';
$defaultorg = '';
$i = 0;
$level = 0;
$parent[$level] = '/';
$xml_parser = xml_parser_create('UTF-8');
// use case-folding so we are sure to find the tag in $map_array
xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, true);
xml_set_element_handler($xml_parser, 'scorm_startElement', 'scorm_endElement');
xml_set_character_data_handler($xml_parser, 'scorm_characterData');
if (!($fp = fopen($basedir.$file, 'r'))) {
die('could not open XML input');
}
while ($data = fread($fp, 4096)) {
if (!xml_parse($xml_parser, $data, feof($fp))) {
die(sprintf('XML error: %s at line %d',
xml_error_string(xml_get_error_code($xml_parser)),
xml_get_current_line_number($xml_parser)));
}
}
xml_parser_free($xml_parser);
$launch = 0;
$sco->scorm = $scorm_id;
delete_records('scorm_scoes','scorm',$scorm_id);
delete_records('scorm_sco_users','scormid',$scorm_id);
if (isset($scoes[1])) {
for ($j=1; $j<=$i; $j++) {
$sco->identifier = $scoes[$j]['identifier'];
$sco->parent = $scoes[$j]['parent'];
$sco->title = $scoes[$j]['title'];
$sco->organization = $scoes[$j]['organization'];
if (!isset($scoes[$j]['datafromlms'])) {
$scoes[$j]['datafromlms'] = '';
}
$sco->datafromlms = $scoes[$j]['datafromlms'];
if (!isset($resources[($scoes[$j]['identifierref'])]['href'])) {
$resources[($scoes[$j]['identifierref'])]['href'] = '';
}
$sco->launch = $resources[($scoes[$j]['identifierref'])]['href'];
if (!isset($resources[($scoes[$j]['identifierref'])]['type'])) {
$resources[($scoes[$j]['identifierref'])]['type'] = '';
}
$sco->type = $resources[($scoes[$j]['identifierref'])]['type'];
if (!isset($scoes[$j]['previous'])) {
$scoes[$j]['previous'] = 0;
}
$sco->previous = $scoes[$j]['previous'];
if (!isset($scoes[$j]['continue'])) {
$scoes[$j]['continue'] = 0;
}
$sco->next = $scoes[$j]['continue'];
if (scorm_remove_spaces($scoes[$j]['isvisible']) != 'false') {
$id = insert_record('scorm_scoes',$sco);
}
//if (($launch==0) && (isset($sco->launch)) && ($defaultorg==$sco->organization)) {
if (($launch==0) && ($defaultorg==$sco->identifier)) {
$launch = $id;
}
}
} else {
foreach ($resources as $label => $resource) {
if (!empty($resource['href'])) {
$sco->identifier = $label;
$sco->title = $label;
$sco->parent = '/';
$sco->launch = $resource['href'];
$sco->type = $resource['type'];
$id = insert_record('scorm_scoes',$sco);
if ($launch == 0) {
$launch = $id;
}
}
}
}
return $launch;
}
function scorm_get_scoes_records($sco_user) {
/// Gets all info required to display the table of scorm results
/// for report.php
global $CFG;
return get_records_sql("SELECT su.*, u.firstname, u.lastname, u.picture
FROM {$CFG->prefix}scorm_sco_users su,
{$CFG->prefix}user u
WHERE su.scormid = '$sco_user->scormid'
AND su.userid = u.id
AND su.userid = '$sco_user->userid'
ORDER BY scoid");
}
function scorm_remove_spaces($sourcestr) {
// Remove blank space from a string
$newstr='';
for( $i=0; $i<strlen($sourcestr); $i++) {
if ($sourcestr[$i]!=' ')
$newstr .=$sourcestr[$i];
}
return $newstr;
}
function scorm_string_round($stringa) {
// Crop a string to $len character and set an anchor title to the full string
$len=11;
if ( strlen($stringa)>$len ) {
return "<A name=\"\" title=\"$stringa\">".substr($stringa,0,$len-4).'...'.substr($stringa,strlen($stringa)-1,1).'</A>';
} else
return $stringa;
}
function scorm_external_link($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.')
$result = true;
/*else if (substr($link,0,7) == 'rstp://')
$result = true;
else if (substr($link,0,6) == 'rtp://')
$result = true;
else if (substr($link,0,6) == 'ftp://')
$result = true;
else if (substr($link,0,9) == 'gopher://')
$result = true; */
return $result;
}
?>
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