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backuplib.php
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backuplib.php
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<?php //$Id$
//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 scorm_scoes_data |
// (UL,pk->id, fk->scorm)-------(UL,pk->id, fk->scoid) |
// | |
// | |
// | |
// 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 ($bf,full_tag('LAUNCH',4,false,$scorm->launch));
fwrite ($bf,full_tag('SKIPVIEW',4,false,$scorm->skipview));
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 ($bf,full_tag('MD5HASH',4,false,$scorm->md5hash));
fwrite ($bf,full_tag("MAXATTEMPT",4,false,$scorm->maxattempt));
fwrite ($bf,full_tag("UPDATEFREQ",4,false,$scorm->updatefreq));
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 ($bf,full_tag('SCORMTYPE',6,false,$sco->scormtype));
fwrite ($bf,full_tag('TITLE',6,false,$sco->title));
$status = backup_scorm_scoes_data($bf,$preferences,$sco->id);
$status = backup_scorm_seq_ruleconds($bf,$preferences,$sco->id);
$status = backup_scorm_seq_rolluprule($bf,$preferences,$sco->id);
$status = backup_scorm_seq_objective($bf,$preferences,$sco->id);
//End sco
$status =fwrite ($bf,end_tag('SCO',5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag('SCOES',4,true));
}
return $status;
}
//Backup scorm_scoes_data contents (executed from scorm_backup_scorm_scoes)
function backup_scorm_scoes_data ($bf,$preferences,$sco) {
global $CFG;
$status = true;
$scorm_sco_datas = get_records('scorm_scoes_data','scoid',$sco,'id');
//If there is data
if ($scorm_sco_datas) {
//Write start tag
$status =fwrite ($bf,start_tag('SCO_DATAS',4,true));
//Iterate over each sco
foreach ($scorm_sco_datas as $sco_data) {
//Start sco track
$status =fwrite ($bf,start_tag('SCO_DATA',5,true));
//Print track contents
fwrite ($bf,full_tag('ID',6,false,$sco_data->id));
fwrite ($bf,full_tag('SCOID',6,false,$sco_data->scoid));
fwrite ($bf,full_tag('NAME',6,false,$sco_data->name));
fwrite ($bf,full_tag('VALUE',6,false,$sco_data->value));
//End sco track
$status =fwrite ($bf,end_tag('SCO_DATA',5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag('SCO_DATAS',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 ($bf,full_tag('ELEMENT',6,false,$sco_track->element));
fwrite ($bf,full_tag('VALUE',6,false,$sco_track->value));
fwrite ($bf,full_tag('ATTEMPT',6,false,$sco_track->attempt));
fwrite ($bf,full_tag('TIMEMODIFIED',6,false,$sco_track->timemodified));
//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 $status;
}
function backup_scorm_seq_ruleconds ($bf,$preferences,$sco) {
global $CFG;
$status = true;
$scorm_seq_ruleconditions = get_records('scorm_seq_ruleconds','scoid',$sco,'id');
//If there is rulecondition
if ($scorm_seq_ruleconditions) {
//Write start tag
$status =fwrite ($bf,start_tag('SEQ_RULECONDS',4,true));
//Iterate over each sco
foreach ($scorm_seq_ruleconditions as $seq_rulecondition) {
//Start sco
$status =fwrite ($bf,start_tag('SEQ_RULECOND',5,true));
//Print track contents
fwrite ($bf,full_tag('ID',6,false,$seq_rulecondition->id));
fwrite ($bf,full_tag('SCOID',6,false,$seq_rulecondition->scoid));
fwrite ($bf,full_tag('CONDITIONCOMBINATION',6,false,$seq_rulecondition->conditioncombination));
fwrite ($bf,full_tag('RULETYPE',6,false,$seq_rulecondition->ruletype));
fwrite ($bf,full_tag('ACTION',6,false,$seq_rulecondition->action));
$status = backup_scorm_seq_rulecond($bf,$preferences,$seq_rulecondition->id);
//End sco track
$status =fwrite ($bf,end_tag('SEQ_RULECOND',5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag('SEQ_RULECONDS',4,true));
}
return $status;
}
function backup_scorm_seq_rulecond ($bf,$preferences,$ruleconditions) {
global $CFG;
$status = true;
$scorm_seq_ruleconditions = get_records('scorm_seq_rulecond','ruleconditionsid',$ruleconditions,'id');
//If there is rulecondition
if ($scorm_seq_ruleconditions) {
//Write start tag
$status =fwrite ($bf,start_tag('SEQ_RULECOND_DATAS',4,true));
//Iterate over each sco
foreach ($scorm_seq_ruleconditions as $seq_rulecondition) {
//Start sco
$status =fwrite ($bf,start_tag('SEQ_RULECOND_DATA',5,true));
//Print track contents
fwrite ($bf,full_tag('ID',6,false,$seq_rulecondition->id));
fwrite ($bf,full_tag('SCOID',6,false,$seq_rulecondition->scoid));
fwrite ($bf,full_tag('RULECONDITIONSID',6,false,$seq_rulecondition->ruleconditionsid));
fwrite ($bf,full_tag('REFRENCEDOBJECTIVE',6,false,$seq_rulecondition->refrencedobjective));
fwrite ($bf,full_tag('MEASURETHRESHOLD',6,false,$seq_rulecondition->measurethreshold));
fwrite ($bf,full_tag('OPERATOR',6,false,$seq_rulecondition->operator));
fwrite ($bf,full_tag('COND',6,false,$seq_rulecondition->cond));
//End sco track
$status =fwrite ($bf,end_tag('SEQ_RULECOND_DATA',5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag('SEQ_RULECOND_DATAS',4,true));
}
return $status;
}
function backup_scorm_seq_rolluprule ($bf,$preferences,$sco) {
global $CFG;
$status = true;
$scorm_seq_rolluprules = get_records('scorm_seq_rolluprule','scoid',$sco,'id');
//If there is rulecondition
if ($scorm_seq_rolluprules) {
//Write start tag
$status =fwrite ($bf,start_tag('SEQ_ROLLUPRULES',4,true));
//Iterate over each sco
foreach ($scorm_seq_rolluprules as $seq_rolluprule) {
//Start sco
$status =fwrite ($bf,start_tag('SEQ_ROLLUPRULE',5,true));
//Print track contents
fwrite ($bf,full_tag('ID',6,false,$seq_rolluprule->id));
fwrite ($bf,full_tag('SCOID',6,false,$seq_rolluprule->scoid));
fwrite ($bf,full_tag('CHILDACTIVITYSET',6,false,$seq_rolluprule->childactivityset));
fwrite ($bf,full_tag('MINIMUMCOUNT',6,false,$seq_rolluprule->minimumcount));
fwrite ($bf,full_tag('MINIMUMPERCENT',6,false,$seq_rolluprule->minimumpercent));
fwrite ($bf,full_tag('CONDITIONCOMBINATION',6,false,$seq_rolluprule->conditioncomnination));
fwrite ($bf,full_tag('ACTION',6,false,$seq_rolluprule->action));
$status = backup_scorm_seq_rolluprulecond($bf,$preferences,$seq_rolluprule->id);
//End sco track
$status =fwrite ($bf,end_tag('SEQ_ROLLUPRULE',5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag('SEQ_ROLLUPRULES',4,true));
}
return $status;
}
function backup_scorm_seq_rolluprulecond ($bf,$preferences,$rolluprule) {
global $CFG;
$status = true;
$scorm_seq_rollupruleconditions = get_records('scorm_seq_rolluprulecond','rollupruleid',$rolluprule,'id');
//If there is rulecondition
if ($scorm_seq_rollupruleconditions) {
//Write start tag
$status =fwrite ($bf,start_tag('SEQ_ROLLUPRULECONDS',4,true));
//Iterate over each sco
foreach ($scorm_seq_rollupruleconditions as $seq_rolluprulecondition) {
//Start sco
$status =fwrite ($bf,start_tag('SEQ_ROLLUPRULECOND',5,true));
//Print track contents
fwrite ($bf,full_tag('ID',6,false,$seq_rolluprulecondition->id));
fwrite ($bf,full_tag('SCOID',6,false,$seq_rolluprulecondition->scoid));
fwrite ($bf,full_tag('ROLLUPRULEID',6,false,$seq_rolluprulecondition->rollupruleid));
fwrite ($bf,full_tag('COND',6,false,$seq_rolluprulecondition->condition));
fwrite ($bf,full_tag('OPERATOR',6,false,$seq_rolluprulecondition->operator));
//End sco track
$status =fwrite ($bf,end_tag('SEQ_ROLLUPRULECOND',5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag('SEQ_ROLLUPRULECONDS',4,true));
}
return $status;
}
function backup_scorm_seq_objective ($bf,$preferences,$sco) {
global $CFG;
$status = true;
$scorm_seq_objectives = get_records('scorm_seq_objective','scoid',$sco,'id');
//If there is rulecondition
if ($scorm_seq_objectives) {
//Write start tag
$status =fwrite ($bf,start_tag('SEQ_OBJECTIVES',4,true));
//Iterate over each sco
foreach ($scorm_seq_objectives as $seq_objective) {
//Start sco
$status =fwrite ($bf,start_tag('SEQ_OBJECTIVE',5,true));
//Print track contents
fwrite ($bf,full_tag('ID',6,false,$seq_objective->id));
fwrite ($bf,full_tag('SCOID',6,false,$seq_objective->scoid));
fwrite ($bf,full_tag('PRIMARYOBJ',6,false,$seq_objective->primaryobj));
fwrite ($bf,full_tag('OBJECTIVEID',6,false,$seq_objective->objectiveid));
fwrite ($bf,full_tag('MINNORMALIZEDMEASURE',6,false,$seq_objective->minnormalizedmeasure));
fwrite ($bf,full_tag('SATISFIEDBYMEASURE',6,false,$seq_objective->objectivemeasureweight));
$status = backup_scorm_seq_mapinfo($bf,$preferences,$seq_objective->id);
//End sco track
$status =fwrite ($bf,end_tag('SEQ_OBJECTIVE',5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag('SEQ_OBJECTIVES',4,true));
}
return $status;
}
function backup_scorm_seq_mapinfo ($bf,$preferences,$objectives) {
global $CFG;
$status = true;
$scorm_seq_objectives = get_records('scorm_seq_mapinfo','objectiveid',$objectives,'id');
//If there is rulecondition
if ($scorm_seq_objectives) {
//Write start tag
$status =fwrite ($bf,start_tag('SEQ_MAPINFOS',4,true));
//Iterate over each sco
foreach ($scorm_seq_objectives as $seq_objective) {
//Start sco
$status =fwrite ($bf,start_tag('SEQ_MAPINFO',5,true));
//Print track contents
fwrite ($bf,full_tag('ID',6,false,$seq_objective->id));
fwrite ($bf,full_tag('SCOID',6,false,$seq_objective->scoid));
fwrite ($bf,full_tag('OBJECTIVEID',6,false,$seq_objective->objectiveid));
fwrite ($bf,full_tag('TARGETOBJECTIVEID',6,false,$seq_objective->targetobjectiveid));
fwrite ($bf,full_tag('READSATISFIEDSTATUS',6,false,$seq_objective->readsatisfiedstatus));
fwrite ($bf,full_tag('READNORMALIZEDMEASURE',6,false,$seq_objective->readnormalizedmeasure));
fwrite ($bf,full_tag('WRITESATISFIEDSTATUS',6,false,$seq_objective->writesatisfiedstatus));
fwrite ($bf,full_tag('WRITENORMALIZEDMEASURE',6,false,$seq_objective->writenormalizedmeasure));
//End sco track
$status =fwrite ($bf,end_tag('SEQ_MAPINFO',5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag('SEQ_MAPINFOS',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.'/scorm/'.$item)
&& array_key_exists($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");
}
?>