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<?PHP //$Id: backuplib.php,v 1.5.8.1 2005/03/03 23:39:11 stronk7 Exp $
//This php script contains all the stuff to backup/restore
//lesson mods
//This is the "graphical" structure of the lesson mod:
//
// lesson ----------------------------|
// (CL,pk->id) |
// | |
// | lesson_grades
// | (UL, pk->id,fk->lessonid)
// lesson_pages
// (CL,pk->id,fk->lessonid)
// |
// |
// |
// lesson_answers
// (CL,pk->id,fk->pageid)
// |
// |
// |
// lesson_attempts
// (UL,pk->id,fk->answerid)
//
// 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 backup procedure about this mod
function lesson_backup_mods($bf, $preferences) {
global $CFG;
$status = true;
//Iterate over lesson table
$lessons = get_records("lesson", "course", $preferences->backup_course, "id");
if ($lessons) {
foreach ($lessons as $lesson) {
//Start mod
fwrite ($bf,start_tag("MOD",3,true));
//Print lesson data
fwrite ($bf,full_tag("ID",4,false,$lesson->id));
fwrite ($bf,full_tag("MODTYPE",4,false,"lesson"));
fwrite ($bf,full_tag("NAME",4,false,$lesson->name));
fwrite ($bf,full_tag("GRADE",4,false,$lesson->grade));
fwrite ($bf,full_tag("USEMAXGRADE",4,false,$lesson->usemaxgrade));
fwrite ($bf,full_tag("MAXANSWERS",4,false,$lesson->maxanswers));
fwrite ($bf,full_tag("MAXATTEMPTS",4,false,$lesson->maxattempts));
fwrite ($bf,full_tag("NEXTPAGEDEFAULT",4,false,$lesson->nextpagedefault));
fwrite ($bf,full_tag("MINQUESTIONS",4,false,$lesson->minquestions));
fwrite ($bf,full_tag("MAXPAGES",4,false,$lesson->maxpages));
fwrite ($bf,full_tag("RETAKE",4,false,$lesson->retake));
fwrite ($bf,full_tag("AVAILABLE",4,false,$lesson->available));
fwrite ($bf,full_tag("DEADLINE",4,false,$lesson->deadline));
fwrite ($bf,full_tag("TIMEMODIFIED",4,false,$lesson->timemodified));
//Now we backup lesson pages
$status = backup_lesson_pages($bf,$preferences,$lesson->id);
//if we've selected to backup users info, then backup grades
if ($status) {
if ($preferences->mods["lesson"]->userinfo) {
$status = backup_lesson_grades($bf, $preferences, $lesson->id);
}
//End mod
$status =fwrite ($bf,end_tag("MOD",3,true));
}
}
}
return $status;
}
//Backup lesson_pages contents (executed from lesson_backup_mods)
function backup_lesson_pages ($bf, $preferences, $lessonid) {
global $CFG;
$status = true;
// run through the pages in their logical order, get the first page
if ($page = get_record_select("lesson_pages", "lessonid = $lessonid AND prevpageid = 0")) {
//Write start tag
$status =fwrite ($bf,start_tag("PAGES",4,true));
//Iterate over each page
while (true) {
//Start of page
$status =fwrite ($bf,start_tag("PAGE",5,true));
//Print page contents (prevpageid and nextpageid not needed)
fwrite ($bf,full_tag("PAGEID",6,false,$page->id)); // needed to fix (absolute) jumps
fwrite ($bf,full_tag("QTYPE",6,false,$page->qtype));
fwrite ($bf,full_tag("QOPTION",6,false,$page->qoption));
fwrite ($bf,full_tag("TIMECREATED",6,false,$page->timecreated));
fwrite ($bf,full_tag("TIMEMODIFIED",6,false,$page->timemodified));
fwrite ($bf,full_tag("TITLE",6,false,$page->title));
fwrite ($bf,full_tag("CONTENTS",6,false,$page->contents));
//Now we backup lesson answers for this page
$status = backup_lesson_answers($bf, $preferences, $page->id);
//End of page
$status =fwrite ($bf,end_tag("PAGE",5,true));
// move to the next (logical) page
if ($page->nextpageid) {
if (!$page = get_record("lesson_pages", "id", $page->nextpageid)) {
error("Lesson Backup: Next page not found!");
}
} else {
// last page reached
break;
}
}
//Write end tag
$status =fwrite ($bf,end_tag("PAGES",4,true));
}
return $status;
}
//Backup lesson_answers contents (executed from backup_lesson_pages)
function backup_lesson_answers($bf,$preferences,$pageno) {
global $CFG;
$status = true;
// get the answers in a set order, the id order
$lesson_answers = get_records("lesson_answers", "pageid", $pageno, "id");
//If there is lesson_answers
if ($lesson_answers) {
//Write start tag
$status =fwrite ($bf,start_tag("ANSWERS",6,true));
//Iterate over each element
foreach ($lesson_answers as $answer) {
//Start answer
$status =fwrite ($bf,start_tag("ANSWER",7,true));
//Print answer contents
fwrite ($bf,full_tag("JUMPTO",8,false,$answer->jumpto));
fwrite ($bf,full_tag("GRADE",8,false,$answer->grade));
fwrite ($bf,full_tag("FLAGS",8,false,$answer->flags));
fwrite ($bf,full_tag("TIMECREATED",8,false,$answer->timecreated));
fwrite ($bf,full_tag("TIMEMODIFIED",8,false,$answer->timemodified));
fwrite ($bf,full_tag("ANSWERTEXT",8,false,$answer->answer));
fwrite ($bf,full_tag("RESPONSE",8,false,$answer->response));
//Now we backup any lesson attempts (if student data required)
if ($preferences->mods["lesson"]->userinfo) {
$status = backup_lesson_attempts($bf,$preferences,$answer->id);
}
//End rubric
$status =fwrite ($bf,end_tag("ANSWER",7,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("ANSWERS",6,true));
}
return $status;
}
//Backup lesson_attempts contents (executed from lesson_backup_answers)
function backup_lesson_attempts ($bf,$preferences,$answerid) {
global $CFG;
$status = true;
$lesson_attempts = get_records("lesson_attempts","answerid", $answerid);
//If there are attempts
if ($lesson_attempts) {
//Write start tag
$status =fwrite ($bf,start_tag("ATTEMPTS",8,true));
//Iterate over each attempt
foreach ($lesson_attempts as $attempt) {
//Start Attempt
$status =fwrite ($bf,start_tag("ATTEMPT",9,true));
//Print attempt contents
fwrite ($bf,full_tag("USERID",10,false,$attempt->userid));
fwrite ($bf,full_tag("RETRY",10,false,$attempt->retry));
fwrite ($bf,full_tag("CORRECT",10,false,$attempt->correct));
fwrite ($bf,full_tag("TIMESEEN",10,false,$attempt->timeseen));
//End attempt
$status =fwrite ($bf,end_tag("ATTEMPT",9,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("ATTEMPTS",8,true));
}
return $status;
}
//Backup lesson_grades contents (executed from backup_lesson_mods)
function backup_lesson_grades ($bf,$preferences,$lessonid) {
global $CFG;
$status = true;
$grades = get_records("lesson_grades", "lessonid", $lessonid);
//If there is grades
if ($grades) {
//Write start tag
$status =fwrite ($bf,start_tag("GRADES",8,true));
//Iterate over each grade
foreach ($grades as $grade) {
//Start grade
$status =fwrite ($bf,start_tag("GRADE",9,true));
//Print grade contents
fwrite ($bf,full_tag("USERID",10,false,$grade->userid));
fwrite ($bf,full_tag("GRADE_VALUE",10,false,$grade->grade));
fwrite ($bf,full_tag("LATE",10,false,$grade->late));
fwrite ($bf,full_tag("COMPLETED",10,false,$grade->completed));
//End comment
$status =fwrite ($bf,end_tag("GRADE",9,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("GRADES",8,true));
}
return $status;
}
//Return an array of info (name,value)
function lesson_check_backup_mods($course,$user_data=false,$backup_unique_code) {
//First the course data
$info[0][0] = get_string("modulenameplural","lesson");
if ($ids = lesson_ids($course)) {
$info[0][1] = count($ids);
} else {
$info[0][1] = 0;
}
//Now, if requested, the user_data
if ($user_data) {
$info[1][0] = get_string("attempts","lesson");
if ($ids = lesson_attempts_ids_by_course ($course)) {
$info[1][1] = count($ids);
} else {
$info[1][1] = 0;
}
}
return $info;
}
// INTERNAL FUNCTIONS. BASED IN THE MOD STRUCTURE
//Returns an array of lesson id
function lesson_ids ($course) {
global $CFG;
return get_records_sql ("SELECT l.id, l.course
FROM {$CFG->prefix}lesson l
WHERE l.course = '$course'");
}
//Returns an array of lesson_submissions id
function lesson_attempts_ids_by_course ($course) {
global $CFG;
return get_records_sql ("SELECT a.id , a.lessonid
FROM {$CFG->prefix}lesson_attempts a,
{$CFG->prefix}lesson l
WHERE l.course = '$course' AND
a.lessonid = l.id");
}
?>
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