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<?php //$Id: backuplib.php,v 1.15 2006/04/12 06:06:31 bobopinna Exp $
//This php script contains all the stuff to backup/restore
//scorm 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,k->id, fk->scormid, fk->scoid, k->element)---
//
// 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)
//
//-----------------------------------------------------------
function scorm_backup_mods($bf,$preferences) {
global $CFG;
$status = true;
//Iterate over scorm table
$scorms = get_records ("scorm","course",$preferences->backup_course,"id");
if ($scorms) {
foreach ($scorms as $scorm) {
if (backup_mod_selected($preferences,'scorm',$scorm->id)) {
$status = scorm_backup_one_mod($bf,$preferences,$scorm);
}
}
}
return $status;
}
function scorm_backup_one_mod($bf,$preferences,$scorm) {
$status = true;
if (is_numeric($scorm)) {
$scorm = get_record('scorm','id',$scorm);
}
//Start mod
fwrite ($bf,start_tag("MOD",3,true));
//Print scorm data
fwrite ($bf,full_tag("ID",4,false,$scorm->id));
fwrite ($bf,full_tag("MODTYPE",4,false,"scorm"));
fwrite ($bf,full_tag("NAME",4,false,$scorm->name));
fwrite ($bf,full_tag("REFERENCE",4,false,$scorm->reference));
fwrite ($bf,full_tag("VERSION",4,false,$scorm->version));
fwrite ($bf,full_tag("MAXGRADE",4,false,$scorm->maxgrade));
fwrite ($bf,full_tag("GRADEMETHOD",4,false,$scorm->grademethod));
fwrite ($bf,full_tag("MAXATTEMPT",4,false,$scorm->maxattempt));
fwrite ($bf,full_tag("LAUNCH",4,false,$scorm->launch));
fwrite ($bf,full_tag("SUMMARY",4,false,$scorm->summary));
fwrite ($bf,full_tag("HIDEBROWSE",4,false,$scorm->hidebrowse));
fwrite ($bf,full_tag("HIDETOC",4,false,$scorm->hidetoc));
fwrite ($bf,full_tag("HIDENAV",4,false,$scorm->hidenav));
fwrite ($bf,full_tag("AUTO",4,false,$scorm->auto));
fwrite ($bf,full_tag("POPUP",4,false,$scorm->popup));
fwrite ($bf,full_tag("OPTIONS",4,false,$scorm->options));
fwrite ($bf,full_tag("WIDTH",4,false,$scorm->width));
fwrite ($bf,full_tag("HEIGHT",4,false,$scorm->height));
fwrite ($bf,full_tag("TIMEMODIFIED",4,false,$scorm->timemodified));
$status = backup_scorm_scoes($bf,$preferences,$scorm->id);
//if we've selected to backup users info, then execute backup_scorm_scoes_track
if ($status) {
if (backup_userdata_selected($preferences,'scorm',$scorm->id)) {
$status = backup_scorm_scoes_track($bf,$preferences,$scorm->id);
$status = backup_scorm_files_instance($bf,$preferences,$scorm->id);
}
}
//End mod
$status =fwrite ($bf,end_tag("MOD",3,true));
return $status;
}
//Backup scorm_scoes contents (executed from scorm_backup_mods)
function backup_scorm_scoes ($bf,$preferences,$scorm) {
global $CFG;
$status = true;
$scorm_scoes = get_records("scorm_scoes","scorm",$scorm,"id");
//If there is scoes
if ($scorm_scoes) {
//Write start tag
$status =fwrite ($bf,start_tag("SCOES",4,true));
//Iterate over each sco
foreach ($scorm_scoes as $sco) {
//Start sco
$status =fwrite ($bf,start_tag("SCO",5,true));
//Print submission contents
fwrite ($bf,full_tag("ID",6,false,$sco->id));
fwrite ($bf,full_tag("MANIFEST",6,false,$sco->manifest));
fwrite ($bf,full_tag("ORGANIZATION",6,false,$sco->organization));
fwrite ($bf,full_tag("PARENT",6,false,$sco->parent));
fwrite ($bf,full_tag("IDENTIFIER",6,false,$sco->identifier));
fwrite ($bf,full_tag("LAUNCH",6,false,$sco->launch));
fwrite ($bf,full_tag("PARAMETERS",6,false,$sco->parameters));
fwrite ($bf,full_tag("SCORMTYPE",6,false,$sco->scormtype));
fwrite ($bf,full_tag("TITLE",6,false,$sco->title));
fwrite ($bf,full_tag("PREREQUISITES",6,false,$sco->prerequisites));
fwrite ($bf,full_tag("MAXTIMEALLOWED",6,false,$sco->maxtimeallowed));
fwrite ($bf,full_tag("TIMELIMITACTION",6,false,$sco->timelimitaction));
fwrite ($bf,full_tag("DATAFROMLMS",6,false,$sco->datafromlms));
fwrite ($bf,full_tag("MASTERYSCORE",6,false,$sco->masteryscore));
fwrite ($bf,full_tag("NEXT",6,false,$sco->next));
fwrite ($bf,full_tag("PREVIOUS",6,false,$sco->previous));
//End sco
$status =fwrite ($bf,end_tag("SCO",5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("SCOES",4,true));
}
return $status;
}
//Backup scorm_scoes_track contents (executed from scorm_backup_mods)
function backup_scorm_scoes_track ($bf,$preferences,$scorm) {
global $CFG;
$status = true;
$scorm_scoes_track = get_records("scorm_scoes_track","scormid",$scorm,"id");
//If there is track
if ($scorm_scoes_track) {
//Write start tag
$status =fwrite ($bf,start_tag("SCO_TRACKS",4,true));
//Iterate over each sco
foreach ($scorm_scoes_track as $sco_track) {
//Start sco track
$status =fwrite ($bf,start_tag("SCO_TRACK",5,true));
//Print track contents
fwrite ($bf,full_tag("ID",6,false,$sco_track->id));
fwrite ($bf,full_tag("USERID",6,false,$sco_track->userid));
fwrite ($bf,full_tag("SCOID",6,false,$sco_track->scoid));
fwrite ($bf,full_tag("ATTEMPT",6,false,$sco_track->attempt));
fwrite ($bf,full_tag("ELEMENT",6,false,$sco_track->element));
fwrite ($bf,full_tag("VALUE",6,false,$sco_track->value));
//End sco track
$status =fwrite ($bf,end_tag("SCO_TRACK",5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("SCO_TRACKS",4,true));
}
return $status;
}
////Return an array of info (name,value)
function scorm_check_backup_mods($course,$user_data=false,$backup_unique_code,$instances=null) {
if (!empty($instances) && is_array($instances) && count($instances)) {
$info = array();
foreach ($instances as $id => $instance) {
$info += scorm_check_backup_mods_instances($instance,$backup_unique_code);
}
return $info;
}
//First the course data
$info[0][0] = get_string("modulenameplural","scorm");
if ($ids = scorm_ids ($course)) {
$info[0][1] = count($ids);
} else {
$info[0][1] = 0;
}
//Now, if requested, the user_data
if ($user_data) {
$info[1][0] = get_string("scoes","scorm");
if ($ids = scorm_scoes_track_ids_by_course ($course)) {
$info[1][1] = count($ids);
} else {
$info[1][1] = 0;
}
}
return $info;
}
function scorm_check_backup_mods_instances($instance,$backup_unique_code) {
$info[$instance->id.'0'][0] = $instance->name;
$info[$instance->id.'0'][1] = '';
if (!empty($instance->userdata)) {
$info[$instance->id.'1'][0] = get_string("scoes","scorm");
if ($ids = scorm_scoes_track_ids_by_instance ($instance->id)) {
$info[$instance->id.'1'][1] = count($ids);
} else {
$info[$instance->id.'1'][1] = 0;
}
}
return $info;
}
function backup_scorm_files_instance($bf,$preferences,$instanceid) {
global $CFG;
$status = true;
//First we check to moddata exists and create it as necessary
//in temp/backup/$backup_code dir
$status = check_and_create_moddata_dir($preferences->backup_unique_code);
$status = check_dir_exists($CFG->dataroot."/temp/backup/".$preferences->backup_unique_code."/moddata/scorm/",true);
if ($status) {
//Only if it exists !! Thanks to Daniel Miksik.
if (is_dir($CFG->dataroot."/".$preferences->backup_course."/".$CFG->moddata."/scorm/".$instanceid)) {
$status = backup_copy_file($CFG->dataroot."/".$preferences->backup_course."/".$CFG->moddata."/scorm/".$instanceid,
$CFG->dataroot."/temp/backup/".$preferences->backup_unique_code."/moddata/scorm/".$instanceid);
}
}
return $status;
}
//Backup scorm package files
function backup_scorm_files($bf,$preferences) {
global $CFG;
$status = true;
//First we check to moddata exists and create it as necessary
//in temp/backup/$backup_code dir
$status = check_and_create_moddata_dir($preferences->backup_unique_code);
//Now copy the scorm dir
if ($status) {
if (is_dir($CFG->dataroot."/".$preferences->backup_course."/".$CFG->moddata."/scorm")) {
$handle = opendir($CFG->dataroot."/".$preferences->backup_course."/".$CFG->moddata."/scorm");
while (false!==($item = readdir($handle))) {
if ($item != '.' && $item != '..' && is_dir($CFG->dataroot."/".$preferences->backup_course."/".$CFG->moddata."/sorm/".$item)
&& array_key_exists($item,$preferences->mods['scorm']->instances)
&& !empty($preferences->mods['scorm']->instances[$item]->backup)) {
$status = backup_copy_file($CFG->dataroot."/".$preferences->backup_course."/".$CFG->moddata."/scorm/".$item,
$CFG->dataroot."/temp/backup/".$preferences->backup_unique_code."/moddata/scorm/",$item);
}
}
}
}
return $status;
}
//Return a content encoded to support interactivities linking. Every module
//should have its own. They are called automatically from the backup procedure.
function scorm_encode_content_links ($content,$preferences) {
global $CFG;
$base = preg_quote($CFG->wwwroot,"/");
//Link to the list of scorms
$buscar="/(".$base."\/mod\/scorm\/index.php\?id\=)([0-9]+)/";
$result= preg_replace($buscar,'$@SCORMINDEX*$2@$',$content);
//Link to scorm view by moduleid
$buscar="/(".$base."\/mod\/scorm\/view.php\?id\=)([0-9]+)/";
$result= preg_replace($buscar,'$@SCORMVIEWBYID*$2@$',$result);
return $result;
}
// INTERNAL FUNCTIONS. BASED IN THE MOD STRUCTURE
//Returns an array of scorms id
function scorm_ids ($course) {
global $CFG;
return get_records_sql ("SELECT a.id, a.course
FROM {$CFG->prefix}scorm a
WHERE a.course = '$course'");
}
//Returns an array of scorm_scoes id
function scorm_scoes_track_ids_by_course ($course) {
global $CFG;
return get_records_sql ("SELECT s.id , s.scormid
FROM {$CFG->prefix}scorm_scoes_track s,
{$CFG->prefix}scorm a
WHERE a.course = '$course' AND
s.scormid = a.id");
}
//Returns an array of scorm_scoes id
function scorm_scoes_track_ids_by_instance ($instanceid) {
global $CFG;
return get_records_sql ("SELECT s.id , s.scormid
FROM {$CFG->prefix}scorm_scoes_track s
WHERE s.scormid = $instanceid");
}
?>
|
