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moodle/mod/scorm/restorelib.php

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<?php //$Id$
//This php script contains all the stuff to backup/restore
//reservation mods
//This is the "graphical" structure of the scorm mod:
//
// scorm
// (CL,pk->id)---------------------
// | |
// | |
// | |
// scorm_scoes |
// (UL,pk->id, fk->scorm) |
// | |
// | |
// | |
// scorm_scoes_track |
// (UL,pk->id, fk->scormid, fk->scoid, fk->userid)--
//
// Meaning: pk->primary key field of the table
// fk->foreign key to link with parent
// nt->nested field (recursive data)
// CL->course level info
// UL->user level info
// files->table may have files)
//
//-----------------------------------------------------------
//This function executes all the restore procedure about this mod
function scorm_restore_mods($mod,$restore) {
global $CFG;
$status = true;
//Get record from backup_ids
$data = backup_getid($restore->backup_unique_code,$mod->modtype,$mod->id);
if ($data) {
//Now get completed xmlized object
$info = $data->info;
//traverse_xmlize($info); //Debug
//print_object ($GLOBALS['traverse_array']); //Debug
//$GLOBALS['traverse_array']=""; //Debug
//Now, build the SCORM record structure
$scorm->course = $restore->course_id;
$scorm->name = backup_todb($info['MOD']['#']['NAME']['0']['#']);
$scorm->reference = backup_todb($info['MOD']['#']['REFERENCE']['0']['#']);
$scorm->version = backup_todb($info['MOD']['#']['VERSION']['0']['#']);
$scorm->maxgrade = backup_todb($info['MOD']['#']['MAXGRADE']['0']['#']);
if (!is_int($scorm->maxgrade)) {
$scorm->maxgrade = 0;
}
$scorm->grademethod = backup_todb($info['MOD']['#']['GRADEMETHOD']['0']['#']);
if (!is_int($scorm->grademethod)) {
$scorm->grademethod = 0;
}
if ($restore->backup_version < 2005041500) {
$scorm->datadir = substr(backup_todb($info['MOD']['#']['DATADIR']['0']['#']),1);
} else {
$scorm->datadir = backup_todb($info['MOD']['#']['ID']['0']['#']);
}
$oldlaunch = backup_todb($info['MOD']['#']['LAUNCH']['0']['#']);
if ($restore->backup_version < 2006102600) {
$scorm->skipview = 1;
} else {
$scorm->skipview = backup_todb($info['MOD']['#']['SKIPVIEW']['0']['#']);
}
$scorm->summary = backup_todb($info['MOD']['#']['SUMMARY']['0']['#']);
$scorm->hidebrowse = backup_todb($info['MOD']['#']['HIDEBROWSE']['0']['#']);
$scorm->hidetoc = backup_todb($info['MOD']['#']['HIDETOC']['0']['#']);
$scorm->hidenav = backup_todb($info['MOD']['#']['HIDENAV']['0']['#']);
$scorm->auto = backup_todb($info['MOD']['#']['AUTO']['0']['#']);
if ($restore->backup_version < 2005040200) {
$oldpopup = backup_todb($info['MOD']['#']['POPUP']['0']['#']);
if (!empty($oldpopup)) {
$scorm->popup = 1;
// Parse old popup field
$options = array();
$oldoptions = explode(',',$scorm->popup);
foreach ($oldoptions as $oldoption) {
list($element,$value) = explode('=',$oldoption);
$element = trim($element);
$value = trim($value);
switch ($element) {
case 'width':
$scorm->width = $value;
break;
case 'height':
$scorm->height = $value;
break;
default:
$options[] = $element.'='.$value;
break;
}
}
$scorm->options = implode($options,',');
} else {
$scorm->popup = 0;
$scorm->options = '';
$scorm->width = '100%';
$scorm->height = 500;
}
} else {
$scorm->popup = backup_todb($info['MOD']['#']['POPUP']['0']['#']);
$scorm->width = backup_todb($info['MOD']['#']['WIDTH']['0']['#']);
if ($scorm->width == 0) {
$scorm->width = '100%';
}
$scorm->height = backup_todb($info['MOD']['#']['HEIGHT']['0']['#']);
if ($scorm->height == 0) {
$scorm->height = 500;
}
}
$scorm->timemodified = time();
//The structure is equal to the db, so insert the scorm
$newid = insert_record ("scorm",$scorm);
//Do some output
if (!defined('RESTORE_SILENTLY')) {
echo "<li>".get_string("modulename","scorm")." \"".format_string(stripslashes($scorm->name),true)."\"</li>";
}
backup_flush(300);
if ($newid) {
//We have the newid, update backup_ids
backup_putid($restore->backup_unique_code,$mod->modtype,
$mod->id, $newid);
$scorm->id = $newid;
//Now copy moddata associated files
$status = scorm_restore_files ($scorm, $restore);
if ($status) {
$status = scorm_scoes_restore_mods ($newid,$info,$restore,$mod->id);
if ($status) {
$launchsco = backup_getid($restore->backup_unique_code,"scorm_scoes",$oldlaunch);
$scorm->launch = $launchsco->new_id;
update_record('scorm',$scorm);
}
}
} else {
$status = false;
}
} else {
$status = false;
}
return $status;
}
//This function restores the scorm_scoes
function scorm_scoes_restore_mods($scorm_id,$info,$restore,$oldmodid) {
global $CFG;
$status = true;
//Get the sco array
$scoes = $info['MOD']['#']['SCOES']['0']['#']['SCO'];
//Iterate over scoes
for($i = 0; $i < sizeof($scoes); $i++) {
$sub_info = $scoes[$i];
//We'll need this later!!
$oldid = backup_todb($sub_info['#']['ID']['0']['#']);
//Now, build the scorm_scoes record structure
$sco->scorm = $scorm_id;
$sco->manifest = backup_todb($sub_info['#']['MANIFEST']['0']['#']);
$sco->organization = backup_todb($sub_info['#']['ORGANIZATION']['0']['#']);
$sco->parent = backup_todb($sub_info['#']['PARENT']['0']['#']);
$sco->identifier = backup_todb($sub_info['#']['IDENTIFIER']['0']['#']);
$sco->launch = backup_todb($sub_info['#']['LAUNCH']['0']['#']);
$sco->title = backup_todb($sub_info['#']['TITLE']['0']['#']);
if ($restore->backup_version < 2005031300) {
$sco->scormtype = backup_todb($sub_info['#']['TYPE']['0']['#']);
} else {
$sco->scormtype = backup_todb($sub_info['#']['SCORMTYPE']['0']['#']);
}
//The structure is equal to the db, so insert the scorm_scoes
$newid = insert_record ("scorm_scoes",$sco);
if ($newid) {
//We have the newid, update backup_ids
backup_putid($restore->backup_unique_code,"scorm_scoes", $oldid, $newid);
} else {
$status = false;
}
}
//Now check if want to restore user data and do it.
if (restore_userdata_selected($restore,'scorm',$oldmodid)) {
//Restore scorm_scoes
if ($status) {
if ($restore->backup_version < 2005031300) {
$status = scorm_scoes_tracks_restore_mods_pre15 ($scorm_id,$info,$restore);
} else {
$status = scorm_scoes_tracks_restore_mods ($scorm_id,$info,$restore);
}
}
}
return $status;
}
//This function restores the scorm_scoes_track
function scorm_scoes_tracks_restore_mods($scorm_id,$info,$restore) {
global $CFG;
$status = true;
$scotracks = NULL;
//Get the sco array
if (!empty($info['MOD']['#']['SCO_TRACKS']['0']['#']['SCO_TRACK']))
$scotracks = $info['MOD']['#']['SCO_TRACKS']['0']['#']['SCO_TRACK'];
//Iterate over sco_users
for($i = 0; $i < sizeof($scotracks); $i++) {
$sub_info = $scotracks[$i];
unset($scotrack);
//Now, build the scorm_scoes_track record structure
$scotrack->scormid = $scorm_id;
$scotrack->userid = backup_todb($sub_info['#']['USERID']['0']['#']);
$scotrack->scoid = backup_todb($sub_info['#']['SCOID']['0']['#']);
$scotrack->element = backup_todb($sub_info['#']['ELEMENT']['0']['#']);
$scotrack->value = backup_todb($sub_info['#']['VALUE']['0']['#']);
//We have to recode the userid field
$user = backup_getid($restore->backup_unique_code,"user",$scotrack->userid);
if (!empty($user)) {
$scotrack->userid = $user->new_id;
}
//We have to recode the scoid field
$sco = backup_getid($restore->backup_unique_code,"scorm_scoes",$scotrack->scoid);
if ($sco != NULL) {
$scotrack->scoid = $sco->new_id;
}
//The structure is equal to the db, so insert the scorm_scoes_track
$newid = insert_record ("scorm_scoes_track",$scotrack);
//Do some output
if (($i+1) % 50 == 0) {
if (!defined('RESTORE_SILENTLY')) {
echo ".";
if (($i+1) % 1000 == 0) {
echo "<br />";
}
}
backup_flush(300);
}
}
return $status;
}
//This function restores the scorm_scoes_track from Moodle 1.4
function scorm_scoes_tracks_restore_mods_pre15 ($scorm_id,$info,$restore) {
global $CFG;
$status = true;
$scousers = NULL;
//Get the sco array
if (!empty($info['MOD']['#']['SCO_USERS']['0']['#']['SCO_USER'])) {
$scousers = $info['MOD']['#']['SCO_USERS']['0']['#']['SCO_USER'];
}
$oldelements = array ('CMI_CORE_LESSON_LOCATION',
'CMI_CORE_LESSON_STATUS',
'CMI_CORE_EXIT',
'CMI_CORE_TOTAL_TIME',
'CMI_CORE_SCORE_RAW',
'CMI_SUSPEND_DATA');
$newelements = array ('cmi.core.lesson_location',
'cmi.core.lesson_status',
'cmi.core.exit',
'cmi.core.total_time',
'cmi.core.score.raw',
'cmi.suspend_data');
//Iterate over sco_users
for ($i = 0; $i < sizeof($scousers); $i++) {
$sub_info = $scousers[$i];
unset($scotrack);
//We'll need this later!!
$oldid = backup_todb($sub_info['#']['ID']['0']['#']);
$oldscoid = backup_todb($sub_info['#']['SCOID']['0']['#']);
$olduserid = backup_todb($sub_info['#']['USERID']['0']['#']);
//Now, build the scorm_scoes_track record structure
$scotrack->scormid = $scorm_id;
$scotrack->userid = backup_todb($sub_info['#']['USERID']['0']['#']);
$scotrack->scoid = backup_todb($sub_info['#']['SCOID']['0']['#']);
$pos = 0;
foreach ($oldelements as $oldelement) {
$elementvalue = backup_todb($sub_info['#'][$oldelement]['0']['#']);
if (!empty($elementvalue)) {
$scotrack->element = $newelements[$pos];
$scotrack->value = backup_todb($sub_info['#'][strtoupper($oldelement)]['0']['#']);
//We have to recode the userid field
$user = backup_getid($restore->backup_unique_code,"user",$scotrack->userid);
if (!empty($user)) {
$scotrack->userid = $user->new_id;
}
//We have to recode the scoid field
$sco = backup_getid($restore->backup_unique_code,"scorm_scoes",$scotrack->scoid);
if (!empty($sco)) {
$scotrack->scoid = $sco->new_id;
}
//The structure is equal to the db, so insert the scorm_scoes_track
$newid = insert_record ("scorm_scoes_track",$scotrack);
}
$pos++;
}
//Do some output
if (($i+1) % 50 == 0) {
if (!defined('RESTORE_SILENTLY')) {
echo ".";
if (($i+1) % 1000 == 0) {
echo "<br />";
}
}
backup_flush(300);
}
}
return $status;
}
//This function copies the scorm related info from backup temp dir to course moddata folder,
//creating it if needed
function scorm_restore_files ($package, $restore) {
global $CFG;
$status = true;
$todo = false;
$moddata_path = "";
$scorm_path = "";
$temp_path = "";
//First, we check to "course_id" exists and create is as necessary
//in CFG->dataroot
$dest_dir = $CFG->dataroot."/".$restore->course_id;
$status = check_dir_exists($dest_dir,true);
//First, locate course's moddata directory
$moddata_path = $CFG->dataroot."/".$restore->course_id."/".$CFG->moddata;
//Check it exists and create it
$status = check_dir_exists($moddata_path,true);
//Now, locate scorm directory
if ($status) {
$scorm_path = $moddata_path."/scorm";
//Check it exists and create it
$status = check_dir_exists($scorm_path,true);
}
//Now locate the temp dir we are restoring from
if ($status) {
$temp_path = $CFG->dataroot."/temp/backup/".$restore->backup_unique_code.
"/moddata/scorm/".$package->datadir;
//Check it exists
if (is_dir($temp_path)) {
$todo = true;
}
}
//If todo, we create the neccesary dirs in course moddata/scorm
if ($status and $todo) {
//Make scorm package directory path
$this_scorm_path = $scorm_path."/".$package->id;
$status = backup_copy_file($temp_path, $this_scorm_path);
}
return $status;
}
//Return a content decoded to support interactivities linking. Every module
//should have its own. They are called automatically from
//scorm_decode_content_links_caller() function in each module
//in the restore process
function scorm_decode_content_links ($content,$restore) {
global $CFG;
$result = $content;
//Link to the list of scorms
$searchstring='/\$@(SCORMINDEX)\*([0-9]+)@\$/';
//We look for it
preg_match_all($searchstring,$content,$foundset);
//If found, then we are going to look for its new id (in backup tables)
if ($foundset[0]) {
//print_object($foundset); //Debug
//Iterate over foundset[2]. They are the old_ids
foreach($foundset[2] as $old_id) {
//We get the needed variables here (course id)
$rec = backup_getid($restore->backup_unique_code,"course",$old_id);
//Personalize the searchstring
$searchstring='/\$@(SCORMINDEX)\*('.$old_id.')@\$/';
//If it is a link to this course, update the link to its new location
if($rec->new_id) {
//Now replace it
$result= preg_replace($searchstring,$CFG->wwwroot.'/mod/scorm/index.php?id='.$rec->new_id,$result);
} else {
//It's a foreign link so leave it as original
$result= preg_replace($searchstring,$restore->original_wwwroot.'/mod/scorm/index.php?id='.$old_id,$result);
}
}
}
//Link to scorm view by moduleid
$searchstring='/\$@(SCORMVIEWBYID)\*([0-9]+)@\$/';
//We look for it
preg_match_all($searchstring,$result,$foundset);
//If found, then we are going to look for its new id (in backup tables)
if ($foundset[0]) {
//print_object($foundset); //Debug
//Iterate over foundset[2]. They are the old_ids
foreach($foundset[2] as $old_id) {
//We get the needed variables here (course_modules id)
$rec = backup_getid($restore->backup_unique_code,"course_modules",$old_id);
//Personalize the searchstring
$searchstring='/\$@(SCORMVIEWBYID)\*('.$old_id.')@\$/';
//If it is a link to this course, update the link to its new location
if($rec->new_id) {
//Now replace it
$result= preg_replace($searchstring,$CFG->wwwroot.'/mod/scorm/view.php?id='.$rec->new_id,$result);
} else {
//It's a foreign link so leave it as original
$result= preg_replace($searchstring,$restore->original_wwwroot.'/mod/scorm/view.php?id='.$old_id,$result);
}
}
}
return $result;
}
//This function makes all the necessary calls to xxxx_decode_content_links()
//function in each module, passing them the desired contents to be decoded
//from backup format to destination site/course in order to mantain inter-activities
//working in the backup/restore process. It's called from restore_decode_content_links()
//function in restore process
function scorm_decode_content_links_caller($restore) {
global $CFG;
$status = true;
if ($scorms = get_records_sql ("SELECT s.id, s.summary
FROM {$CFG->prefix}scorm s
WHERE s.course = $restore->course_id")) {
$i = 0; //Counter to send some output to the browser to avoid timeouts
foreach ($scorms as $scorm) {
//Increment counter
$i++;
$content = $scorm->summary;
$result = restore_decode_content_links_worker($content,$restore);
if ($result != $content) {
//Update record
$scorm->summary = addslashes($result);
$status = update_record("scorm",$scorm);
if (debugging()) {
if (!defined('RESTORE_SILENTLY')) {
echo '<br /><hr />'.htmlentities($content).'<br />changed to<br />'.htmlentities($result).'<hr /><br />';
}
}
}
//Do some output
if (($i+1) % 5 == 0) {
if (!defined('RESTORE_SILENTLY')) {
echo ".";
if (($i+1) % 100 == 0) {
echo "<br />";
}
}
backup_flush(300);
}
}
}
return $status;
}
//This function returns a log record with all the necessay transformations
//done. It's used by restore_log_module() to restore modules log.
function scorm_restore_logs($restore,$log) {
$status = true;
return $status;
}
?>
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