moodle/mod/attendance/backuplib.php
2004-09-12 21:43:59 +00:00

141 lines
5.1 KiB
PHP

<?php //$Id$
//This php script contains all the stuff to backup/restore
//attendance mods
//This is the "graphical" structure of the attendance mod:
//
// attendance
// (CL,pk->id)
// |
// |
// |
// attendance_roll
// (UL,pk->id, fk->dayid)
//
// 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 attendance_backup_mods($bf,$preferences) {
global $CFG;
$status = true;
//Iterate over attendance table
$attendances = get_records ("attendance","course",$preferences->backup_course,"id");
if ($attendances) {
foreach ($attendances as $attendance) {
//Start mod
fwrite ($bf,start_tag("MOD",3,true));
//Print choice data
fwrite ($bf,full_tag("ID",4,false,$attendance->id));
fwrite ($bf,full_tag("MODTYPE",4,false,"attendance"));
fwrite ($bf,full_tag("NAME",4,false,$attendance->name));
fwrite ($bf,full_tag("DAY",4,false,$attendance->day));
fwrite ($bf,full_tag("HOURS",4,false,$attendance->hours));
fwrite ($bf,full_tag("ROLL",4,false,$attendance->roll));
fwrite ($bf,full_tag("NOTES",4,false,$attendance->notes));
fwrite ($bf,full_tag("TIMEMODIFIED",4,false,$attendance->timemodified));
fwrite ($bf,full_tag("DYNSECTION",4,false,$attendance->dynsection));
fwrite ($bf,full_tag("EDITED",4,false,$attendance->edited));
fwrite ($bf,full_tag("AUTOATTEND",4,false,$attendance->autoattend));
//if we've selected to backup users info, then execute backup_attendance_roll
if ($preferences->mods["attendance"]->userinfo) {
$status = backup_attendance_roll($bf,$preferences,$attendance->id);
}
//End mod
$status =fwrite ($bf,end_tag("MOD",3,true));
}
}
return $status;
}
//Backup attendance_roll contents (executed from attendance_backup_mods)
function backup_attendance_roll ($bf,$preferences,$attendance) {
global $CFG;
$status = true;
$attendance_rolls = get_records("attendance_roll","dayid",$attendance,"id");
//If there is rolls
if ($attendance_rolls) {
//Write start tag
$status =fwrite ($bf,start_tag("ROLLS",4,true));
//Iterate over each roll
foreach ($attendance_rolls as $att_rol) {
//Start roll
$status =fwrite ($bf,start_tag("ROLL",5,true));
//Print roll contents
fwrite ($bf,full_tag("ID",6,false,$att_rol->id));
fwrite ($bf,full_tag("USERID",6,false,$att_rol->userid));
fwrite ($bf,full_tag("HOUR",6,false,$att_rol->hour));
fwrite ($bf,full_tag("STATUS",6,false,$att_rol->status));
fwrite ($bf,full_tag("NOTES",6,false,$att_rol->notes));
//End roll
$status =fwrite ($bf,end_tag("ROLL",5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("ROLLS",4,true));
}
return $status;
}
////Return an array of info (name,value)
function attendance_check_backup_mods($course,$user_data=false,$backup_unique_code) {
//First the course data
$info[0][0] = get_string("modulenameplural","attendance");
if ($ids = attendance_ids ($course)) {
$info[0][1] = count($ids);
} else {
$info[0][1] = 0;
}
//Now, if requested, the user_data
if ($user_data) {
$info[1][0] = get_string("entries");
if ($ids = attendance_roll_ids_by_course ($course)) {
$info[1][1] = count($ids);
} else {
$info[1][1] = 0;
}
}
return $info;
}
// INTERNAL FUNCTIONS. BASED IN THE MOD STRUCTURE
//Returns an array of attendances id
function attendance_ids ($course) {
global $CFG;
return get_records_sql ("SELECT a.id, a.course
FROM {$CFG->prefix}attendance a
WHERE a.course = '$course'");
}
//Returns an array of attendance_rolls id
function attendance_roll_ids_by_course ($course) {
global $CFG;
return get_records_sql ("SELECT r.id , r.dayid
FROM {$CFG->prefix}attendance_roll r,
{$CFG->prefix}attendance a
WHERE a.course = '$course' AND
r.dayid = a.id");
}
?>