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backuplib.php
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backuplib.php
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<?PHP //$Id$
//This file contains all the function needed in the backup utility
//except the mod-related funtions that are into every backuplib.php inside
//every mod directory
//Insert necessary category ids to backup_ids table
function insert_category_ids ($course,$backup_unique_code) {
global $CFG;
$status = true;
$status = execute_sql("INSERT INTO {$CFG->prefix}backup_ids
(backup_code, table_name, old_id)
SELECT DISTINCT '$backup_unique_code','quiz_categories',t.category
FROM {$CFG->prefix}quiz_questions t,
{$CFG->prefix}quiz_question_grades g,
{$CFG->prefix}quiz q
WHERE q.course = '$course' AND
g.quiz = q.id AND
g.question = t.id",false);
return $status;
}
//Delete category ids from backup_ids table
function delete_category_ids ($backup_unique_code) {
global $CFG;
$status = true;
$status = execute_sql("DELETE FROM {$CFG->prefix}backup_ids
WHERE backup_code = '$backup_unique_code'",false);
return $status;
}
//Calculate the number of users to backup and put their ids in backup_ids
//Return an array of info (name,value)
function user_check_backup($course,$backup_unique_code,$backup_users) {
//$backup_users=0-->all
// 1-->course (needed + enrolled)
global $CFG;
global $db;
$count_users = 0;
//Calculate needed users (calling every xxxx_get_participants function + scales users)
$needed_users = backup_get_needed_users($course);
//Calculate enrolled users (students + teachers)
$enrolled_users = backup_get_enrolled_users($course);
//Calculate all users (every record in users table)
$all_users = backup_get_all_users();
//Calculate course users (needed + enrolled)
//First, needed
$course_users = $needed_users;
//Now, enrolled
if ($enrolled_users) {
foreach ($enrolled_users as $enrolled_user) {
$course_users[$enrolled_user->id]->id = $enrolled_user->id;
}
}
//Now, depending of parameters, create $backupable_users
if ($backup_users == 0) {
$backupable_users = $all_users;
} else {
$backupable_users = $course_users;
}
//If we have backupable users
if ($backupable_users) {
//Iterate over users putting their roles
foreach ($backupable_users as $backupable_user) {
$backupable_user->info = "";
//Is Admin in tables (not is_admin()) !!
if (record_exists("user_admins","userid",$backupable_user->id)) {
$backupable_user->info .= "admin";
}
//Is Course Creator in tables (not is_coursecreator()) !!
if (record_exists("user_coursecreators","userid",$backupable_user->id)) {
$backupable_user->info .= "coursecreator";
}
//Is Teacher in tables (not is_teacher()) !!
if (record_exists("user_teachers","course",$course,"userid",$backupable_user->id)) {
$backupable_user->info .= "teacher";
}
//Is Student in tables (not is_student()) !!
if (record_exists("user_students","course",$course,"userid",$backupable_user->id)) {
$backupable_user->info .= "student";
}
//Is needed user (exists in needed_users)
if ($needed_users[$backupable_user->id]) {
$backupable_user->info .= "needed";
}
//Now create the backup_id record
$backupids_rec->backup_code = $backup_unique_code;
$backupids_rec->table_name = "user";
$backupids_rec->old_id = $backupable_user->id;
$backupids_rec->info = $backupable_user->info;
//Insert the record id. backup_users decide it.
//When all users
$status = insert_record("backup_ids",$backupids_rec,false);
$count_users++;
}
//Do some output
backup_flush(30);
}
//Prepare Info
//Gets the user data
$info[0][0] = get_string("users");
$info[0][1] = $count_users;
return $info;
}
//Returns every needed user (participant) in a course
//It uses the xxxx_get_participants() function
//plus users needed to backup scales.
//WARNING: It returns only NEEDED users, not every
// every student and teacher in the course, so it
//must be merged with backup_get_enrrolled_users !!
function backup_get_needed_users ($courseid) {
global $CFG;
$result = false;
$course_modules = get_records_sql ("SELECT cm.id, m.name, cm.instance
FROM {$CFG->prefix}modules m,
{$CFG->prefix}course_modules cm
WHERE m.id = cm.module and
cm.course = '$courseid'");
if ($course_modules) {
//Iterate over each module
foreach ($course_modules as $course_module) {
$modlib = "$CFG->dirroot/mod/$course_module->name/lib.php";
$modgetparticipants = $course_module->name."_get_participants";
if (file_exists($modlib)) {
include_once($modlib);
if (function_exists($modgetparticipants)) {
$module_participants = $modgetparticipants($course_module->instance);
//Add them to result
if ($module_participants) {
foreach ($module_participants as $module_participant) {
$result[$module_participant->id]->id = $module_participant->id;
}
}
}
}
}
}
//Now, add scales users (from site and course scales)
//Get users
$scaleusers = get_records_sql("SELECT DISTINCT userid,userid
FROM {$CFG->prefix}scale
WHERE courseid = '0' or courseid = '$courseid'");
//Add scale users to results
if ($scaleusers) {
foreach ($scaleusers as $scaleuser) {
//If userid != 0
if ($scaleuser->userid != 0) {
$result[$scaleuser->userid]->id = $scaleuser->userid;
}
}
}
return $result;
}
//Returns every enrolled user (student and teacher) in a course
function backup_get_enrolled_users ($courseid) {
global $CFG;
$result = false;
//Get teachers
$teachers = get_records_sql("SELECT DISTINCT userid,userid
FROM {$CFG->prefix}user_teachers
WHERE course = '$courseid'");
//Get students
$students = get_records_sql("SELECT DISTINCT userid,userid
FROM {$CFG->prefix}user_students
WHERE course = '$courseid'");
//Add teachers
if ($teachers) {
foreach ($teachers as $teacher) {
$result[$teacher->userid]->id = $teacher->userid;
}
}
//Add students
if ($students) {
foreach ($students as $student) {
$result[$student->userid]->id = $student->userid;
}
}
return $result;
}
//Returns all users (every record in users table)
function backup_get_all_users() {
global $CFG;
$result = false;
//Get users
$users = get_records_sql("SELECT DISTINCT id,id
FROM {$CFG->prefix}user");
//Add users
if ($users) {
foreach ($users as $user) {
$result[$user->id]->id = $user->id;
}
}
return $result;
}
//Calculate the number of log entries to backup
//Return an array of info (name,value)
function log_check_backup($course) {
global $CFG;
//Now execute the count
$ids = count_records("log","course",$course);
//Gets the user data
$info[0][0] = get_string("logs");
if ($ids) {
$info[0][1] = $ids;
} else {
$info[0][1] = 0;
}
return $info;
}
//Calculate the number of user files to backup
//Under $CFG->dataroot/users
//and put them (their path) in backup_ids
//Return an array of info (name,value)
function user_files_check_backup($course,$backup_unique_code) {
global $CFG;
$rootdir = $CFG->dataroot."/users";
//Check if directory exists
if (is_dir($rootdir)) {
$coursedirs = get_directory_list($rootdir);
foreach ($coursedirs as $dir) {
//Extracts user id from file path
$tok = strtok($dir,"/");
if ($tok) {
$userid = $tok;
} else {
$tok = "";
}
//Look it is a backupable user
$data = get_record ("backup_ids","backup_code","$backup_unique_code",
"table_name","user",
"old_id",$userid);
if ($data) {
//Insert them into backup_files
$status = execute_sql("INSERT INTO {$CFG->prefix}backup_files
(backup_code, file_type, path, old_id)
VALUES
('$backup_unique_code','user','$dir','$userid')",false);
}
//Do some output
backup_flush(30);
}
}
//Now execute the select
$ids = get_records_sql("SELECT DISTINCT b.path, b.old_id
FROM {$CFG->prefix}backup_files b
WHERE backup_code = '$backup_unique_code' AND
file_type = 'user'");
//Gets the user data
$info[0][0] = get_string("files");
if ($ids) {
$info[0][1] = count($ids);
} else {
$info[0][1] = 0;
}
return $info;
}
//Calculate the number of course files to backup
//under $CFG->dataroot/$course, except $CFG->moddata, and backupdata
//and put them (their path) in backup_ids
//Return an array of info (name,value)
function course_files_check_backup($course,$backup_unique_code) {
global $CFG;
$rootdir = $CFG->dataroot."/$course";
//Check if directory exists
if (is_dir($rootdir)) {
$coursedirs = get_directory_list($rootdir,$CFG->moddata);
$backupdata_dir = "backupdata";
foreach ($coursedirs as $dir) {
//Check it isn't backupdata_dir
if (strpos($dir,$backupdata_dir)!==0) {
//Insert them into backup_files
$status = execute_sql("INSERT INTO {$CFG->prefix}backup_files
(backup_code, file_type, path)
VALUES
('$backup_unique_code','course','$dir')",false);
}
//Do some output
backup_flush(30);
}
}
//Now execute the select
$ids = get_records_sql("SELECT DISTINCT b.path, b.old_id
FROM {$CFG->prefix}backup_files b
WHERE backup_code = '$backup_unique_code' AND
file_type = 'course'");
//Gets the user data
$info[0][0] = get_string("files");
if ($ids) {
$info[0][1] = count($ids);
} else {
$info[0][1] = 0;
}
return $info;
}
//Function to check and create the needed moddata dir to
//save all the mod backup files. We always name it moddata
//to be able to restore it, but in restore we check for
//$CFG->moddata !!
function check_and_create_moddata_dir($backup_unique_code) {
global $CFG;
$status = check_dir_exists($CFG->dataroot."/temp/backup/".$backup_unique_code."/moddata",true);
return $status;
}
//Function to check and create the "user_files" dir to
//save all the user files we need from "users" dir
function check_and_create_user_files_dir($backup_unique_code) {
global $CFG;
$status = check_dir_exists($CFG->dataroot."/temp/backup/".$backup_unique_code."/user_files",true);
return $status;
}
//Function to check and create the "course_files" dir to
//save all the course files we need from "CFG->datadir/course" dir
function check_and_create_course_files_dir($backup_unique_code) {
global $CFG;
$status = check_dir_exists($CFG->dataroot."/temp/backup/".$backup_unique_code."/course_files",true);
return $status;
}
//Function to create, open and write header of the xml file
function backup_open_xml($backup_unique_code) {
global $CFG;
$status = true;
//Open for writing
$file = $CFG->dataroot."/temp/backup/".$backup_unique_code."/moodle.xml";
$backup_file = fopen($file,"w");
//Writes the header
$status = fwrite ($backup_file,"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
if ($status) {
$status = fwrite ($backup_file,start_tag("MOODLE_BACKUP",0,true));
}
if ($status) {
return $backup_file;
} else {
return false;
}
}
//Close the file
function backup_close_xml($backup_file) {
$status = fwrite ($backup_file,end_tag("MOODLE_BACKUP",0,true));
return fclose($backup_file);
}
//Return the xml start tag
function start_tag($tag,$level=0,$endline=false) {
if ($endline) {
$endchar = "\n";
} else {
$endchar = "";
}
return str_repeat(" ",$level*2)."<".strtoupper($tag).">".$endchar;
}
//Return the xml end tag
function end_tag($tag,$level=0,$endline=true) {
if ($endline) {
$endchar = "\n";
} else {
$endchar = "";
}
return str_repeat(" ",$level*2)."</".strtoupper($tag).">".$endchar;
}
//Return the start tag, the contents and the end tag
function full_tag($tag,$level=0,$endline=true,$content,$to_utf=true) {
$st = start_tag($tag,$level,$endline);
$co="";
if ($to_utf) {
$co = preg_replace("/\r\n|\r/", "\n", utf8_encode(htmlspecialchars($content)));
} else {
$co = preg_replace("/\r\n|\r/", "\n", htmlspecialchars($content));
}
$et = end_tag($tag,0,true);
return $st.$co.$et;
}
//Prints General info about the course
//name, moodle_version (internal and release), backup_version, date, info in file...
function backup_general_info ($bf,$preferences) {
global $CFG;
fwrite ($bf,start_tag("INFO",1,true));
//The name of the backup
fwrite ($bf,full_tag("NAME",2,false,$preferences->backup_name));
//The moodle_version
fwrite ($bf,full_tag("MOODLE_VERSION",2,false,$preferences->moodle_version));
fwrite ($bf,full_tag("MOODLE_RELEASE",2,false,$preferences->moodle_release));
//The backup_version
fwrite ($bf,full_tag("BACKUP_VERSION",2,false,$preferences->backup_version));
fwrite ($bf,full_tag("BACKUP_RELEASE",2,false,$preferences->backup_release));
//The date
fwrite ($bf,full_tag("DATE",2,false,$preferences->backup_unique_code));
//Te includes tag
fwrite ($bf,start_tag("DETAILS",2,true));
//Now, go to mod element of preferences to print its status
foreach ($preferences->mods as $element) {
//Calculate info
$included = "false";
$userinfo = "false";
if ($element->backup) {
$included = "true";
if ($element->userinfo) {
$userinfo = "true";
}
}
//Prints the mod start
fwrite ($bf,start_tag("MOD",3,true));
fwrite ($bf,full_tag("NAME",4,false,$element->name));
fwrite ($bf,full_tag("INCLUDED",4,false,$included));
fwrite ($bf,full_tag("USERINFO",4,false,$userinfo));
//Print the end
fwrite ($bf,end_tag("MOD",3,true));
}
//The user in backup
if ($preferences->backup_users == 1) {
fwrite ($bf,full_tag("USERS",3,false,"course"));
} else {
fwrite ($bf,full_tag("USERS",3,false,"all"));
}
//The logs in backup
if ($preferences->backup_logs == 1) {
fwrite ($bf,full_tag("LOGS",3,false,"true"));
} else {
fwrite ($bf,full_tag("LOGS",3,false,"false"));
}
//The user files
if ($preferences->backup_user_files == 1) {
fwrite ($bf,full_tag("USERFILES",3,false,"true"));
} else {
fwrite ($bf,full_tag("USERFILES",3,false,"false"));
}
//The course files
if ($preferences->backup_course_files == 1) {
fwrite ($bf,full_tag("COURSEFILES",3,false,"true"));
} else {
fwrite ($bf,full_tag("COURSEFILES",3,false,"false"));
}
fwrite ($bf,end_tag("DETAILS",2,true));
$status = fwrite ($bf,end_tag("INFO",1,true));
return $status;
}
//Prints course's general info (table course)
function backup_course_start ($bf,$preferences) {
global $CFG;
$status = true;
//Course open tag
fwrite ($bf,start_tag("COURSE",1,true));
//Header open tag
fwrite ($bf,start_tag("HEADER",2,true));
//Get info from course
$course=false;
if ($courses = get_records("course","id",$preferences->backup_course)) {
$course = $courses[$preferences->backup_course];
}
if ($course) {
//Prints course info
fwrite ($bf,full_tag("ID",3,false,$course->id));
//Obtain the category
$category = false;
if ($categories = get_records("course_categories","id","$course->category")) {
$category = $categories[$course->category];
}
if ($category) {
//Prints category info
fwrite ($bf,start_tag("CATEGORY",3,true));
fwrite ($bf,full_tag("ID",4,false,$course->category));
fwrite ($bf,full_tag("NAME",4,false,$category->name));
fwrite ($bf,end_tag("CATEGORY",3,true));
}
//Continues with the course
fwrite ($bf,full_tag("PASSWORD",3,false,$course->password));
fwrite ($bf,full_tag("FULLNAME",3,false,$course->fullname));
fwrite ($bf,full_tag("SHORTNAME",3,false,$course->shortname));
fwrite ($bf,full_tag("SUMMARY",3,false,$course->summary));
fwrite ($bf,full_tag("FORMAT",3,false,$course->format));
fwrite ($bf,full_tag("SHOWGRADES",3,false,$course->showgrades));
fwrite ($bf,full_tag("NEWSITEMS",3,false,$course->newsitems));
fwrite ($bf,full_tag("TEACHER",3,false,$course->teacher));
fwrite ($bf,full_tag("TEACHERS",3,false,$course->teachers));
fwrite ($bf,full_tag("STUDENT",3,false,$course->student));
fwrite ($bf,full_tag("STUDENTS",3,false,$course->students));
fwrite ($bf,full_tag("GUEST",3,false,$course->guest));
fwrite ($bf,full_tag("STARTDATE",3,false,$course->startdate));
fwrite ($bf,full_tag("NUMSECTIONS",3,false,$course->numsections));
fwrite ($bf,full_tag("SHOWRECENT",3,false,$course->showrecent));
fwrite ($bf,full_tag("MAXBYTES",3,false,$course->maxbytes));
fwrite ($bf,full_tag("SHOWREPORTS",3,false,$course->showreports));
fwrite ($bf,full_tag("MARKER",3,false,$course->marker));
fwrite ($bf,full_tag("VISIBLE",3,false,$course->visible));
fwrite ($bf,full_tag("TIMECREATED",3,false,$course->timecreated));
$status = fwrite ($bf,full_tag("TIMEMODIFIED",3,false,$course->timemodified));
//Print header end
fwrite ($bf,end_tag("HEADER",2,true));
} else {
$status = false;
}
return $status;
}
//Prints course's end tag
function backup_course_end ($bf,$preferences) {
//Course end tag
$status = fwrite ($bf,end_tag("COURSE",1,true));
return $status;
}
//Prints course's sections info (table course_sections)
function backup_course_sections ($bf,$preferences) {
global $CFG;
$status = true;
//Get info from sections
$section=false;
if ($sections = get_records("course_sections","course",$preferences->backup_course,"section")) {
//Section open tag
fwrite ($bf,start_tag("SECTIONS",2,true));
//Iterate over every section (ordered by section)
foreach ($sections as $section) {
//Begin Section
fwrite ($bf,start_tag("SECTION",3,true));
fwrite ($bf,full_tag("ID",4,false,$section->id));
fwrite ($bf,full_tag("NUMBER",4,false,$section->section));
fwrite ($bf,full_tag("SUMMARY",4,false,$section->summary));
fwrite ($bf,full_tag("VISIBLE",4,false,$section->visible));
//Now print the mods in section
backup_course_modules ($bf,$preferences,$section);
//End section
fwrite ($bf,end_tag("SECTION",3,true));
}
//Section close tag
$status = fwrite ($bf,end_tag("SECTIONS",2,true));
}
return $status;
}
//Prints course's modules info (table course_modules)
//Only for selected mods in preferences
function backup_course_modules ($bf,$preferences,$section) {
global $CFG;
$status = true;
$first_record = true;
//Now print the mods in section
//Extracts mod id from sequence
$tok = strtok($section->sequence,",");
while ($tok) {
//Get module's type
$moduletype = get_module_type ($preferences->backup_course,$tok);
//Check if we've selected to backup that type
if ($moduletype and $preferences->mods[$moduletype]->backup) {
$selected = true;
} else {
$selected = false;
}
if ($selected) {
//Gets course_module data from db
$course_module = get_records ("course_modules","id",$tok);
//If it's the first, pring MODS tag
if ($first_record) {
fwrite ($bf,start_tag("MODS",4,true));
$first_record = false;
}
//Print mod info from course_modules
fwrite ($bf,start_tag("MOD",5,true));
//Save neccesary info to backup_ids
fwrite ($bf,full_tag("ID",6,false,$tok));
fwrite ($bf,full_tag("TYPE",6,false,$moduletype));
fwrite ($bf,full_tag("INSTANCE",6,false,$course_module[$tok]->instance));
fwrite ($bf,full_tag("ADDED",6,false,$course_module[$tok]->added));
fwrite ($bf,full_tag("DELETED",6,false,$course_module[$tok]->deleted));
fwrite ($bf,full_tag("SCORE",6,false,$course_module[$tok]->score));
fwrite ($bf,full_tag("INDENT",6,false,$course_module[$tok]->indent));
fwrite ($bf,full_tag("VISIBLE",6,false,$course_module[$tok]->visible));
fwrite ($bf,end_tag("MOD",5,true));
}
//check for next
$tok = strtok(",");
}
//Si ha habido modulos, final de MODS
if (!$first_record) {
$status =fwrite ($bf,end_tag("MODS",4,true));
}
return $status;
}
//Print users to xml
//Only users previously calculated in backup_ids will output
//
function backup_user_info ($bf,$preferences) {
global $CFG;
$status = true;
$users = get_records_sql("SELECT u.old_id, u.table_name,u.info
FROM {$CFG->prefix}backup_ids u
WHERE u.backup_code = '$preferences->backup_unique_code' AND
u.table_name = 'user'");
//If we have users to backup
if ($users) {
//Begin Users tag
fwrite ($bf,start_tag("USERS",2,true));
$counter = 0;
//With every user
foreach ($users as $user) {
//Get user data from table
$user_data = get_record("user","id",$user->old_id);
//Begin User tag
fwrite ($bf,start_tag("USER",3,true));
//Output all user data
fwrite ($bf,full_tag("ID",4,false,$user_data->id));
fwrite ($bf,full_tag("CONFIRMED",4,false,$user_data->confirmed));
fwrite ($bf,full_tag("DELETED",4,false,$user_data->deleted));
fwrite ($bf,full_tag("USERNAME",4,false,$user_data->username));
fwrite ($bf,full_tag("PASSWORD",4,false,$user_data->password));
fwrite ($bf,full_tag("IDNUMBER",4,false,$user_data->idnumber));
fwrite ($bf,full_tag("FIRSTNAME",4,false,$user_data->firstname));
fwrite ($bf,full_tag("LASTNAME",4,false,$user_data->lastname));
fwrite ($bf,full_tag("EMAIL",4,false,$user_data->email));
fwrite ($bf,full_tag("ICQ",4,false,$user_data->icq));
fwrite ($bf,full_tag("PHONE1",4,false,$user_data->phone1));
fwrite ($bf,full_tag("PHONE2",4,false,$user_data->phone2));
fwrite ($bf,full_tag("INSTITUTION",4,false,$user_data->institution));
fwrite ($bf,full_tag("DEPARTMENT",4,false,$user_data->department));
fwrite ($bf,full_tag("ADDRESS",4,false,$user_data->address));
fwrite ($bf,full_tag("CITY",4,false,$user_data->city));
fwrite ($bf,full_tag("COUNTRY",4,false,$user_data->country));
fwrite ($bf,full_tag("LANG",4,false,$user_data->lang));
fwrite ($bf,full_tag("TIMEZONE",4,false,$user_data->timezone));
fwrite ($bf,full_tag("FIRSTACCESS",4,false,$user_data->firstaccess));
fwrite ($bf,full_tag("LASTACCESS",4,false,$user_data->lastaccess));
fwrite ($bf,full_tag("LASTLOGIN",4,false,$user_data->lastlogin));
fwrite ($bf,full_tag("CURRENTLOGIN",4,false,$user_data->currentlogin));
fwrite ($bf,full_tag("LASTIP",4,false,$user_data->lastIP));
fwrite ($bf,full_tag("SECRET",4,false,$user_data->secret));
fwrite ($bf,full_tag("PICTURE",4,false,$user_data->picture));
fwrite ($bf,full_tag("URL",4,false,$user_data->url));
fwrite ($bf,full_tag("DESCRIPTION",4,false,$user_data->description));
fwrite ($bf,full_tag("MAILFORMAT",4,false,$user_data->mailformat));
fwrite ($bf,full_tag("MAILDISPLAY",4,false,$user_data->maildisplay));
fwrite ($bf,full_tag("HTMLEDITOR",4,false,$user_data->htmleditor));
fwrite ($bf,full_tag("AUTOSUBSCRIBE",4,false,$user_data->autosubscribe));
fwrite ($bf,full_tag("TIMEMODIFIED",4,false,$user_data->timemodified));
//Output every user role (with its associated info)
$user->isadmin = strpos($user->info,"admin");
$user->iscoursecreator = strpos($user->info,"coursecreator");
$user->isteacher = strpos($user->info,"teacher");
$user->isstudent = strpos($user->info,"student");
$user->isneeded = strpos($user->info,"needed");
if ($user->isadmin!==false or
$user->iscoursecreator!==false or
$user->isteacher!==false or
$user->isstudent!==false or
$user->isneeded!==false) {
//Begin ROLES tag
fwrite ($bf,start_tag("ROLES",4,true));
//PRINT ROLE INFO
//Admins
if ($user->isadmin!==false) {
//Print ROLE start
fwrite ($bf,start_tag("ROLE",5,true));
//Print Role info
fwrite ($bf,full_tag("TYPE",6,false,"admin"));
//Print ROLE end
fwrite ($bf,end_tag("ROLE",5,true));
}
//CourseCreator
if ($user->iscoursecreator!==false) {
//Print ROLE start
fwrite ($bf,start_tag("ROLE",5,true));
//Print Role info
fwrite ($bf,full_tag("TYPE",6,false,"coursecreator"));
//Print ROLE end
fwrite ($bf,end_tag("ROLE",5,true));
}
//Teacher
if ($user->isteacher!==false) {
//Print ROLE start
fwrite ($bf,start_tag("ROLE",5,true));
//Print Role info
fwrite ($bf,full_tag("TYPE",6,false,"teacher"));
//Get specific info for teachers
$tea = get_record("user_teachers","userid",$user->old_id,"course",$preferences->backup_course);
fwrite ($bf,full_tag("AUTHORITY",6,false,$tea->authority));
fwrite ($bf,full_tag("TEA_ROLE",6,false,$tea->role));
fwrite ($bf,full_tag("EDITALL",6,false,$tea->editall));
fwrite ($bf,full_tag("TIMEMODIFIED",6,false,$tea->timemodified));
fwrite ($bf,full_tag("TIMEACCESS",6,false,$tea->timeaccess));
//Print ROLE end
fwrite ($bf,end_tag("ROLE",5,true));
}
//Student
if ($user->isstudent!==false) {
//Print ROLE start
fwrite ($bf,start_tag("ROLE",5,true));
//Print Role info
fwrite ($bf,full_tag("TYPE",6,false,"student"));
//Get specific info for students
$stu = get_record("user_students","userid",$user->old_id,"course",$preferences->backup_course);
fwrite ($bf,full_tag("TIMESTART",6,false,$stu->timestart));
fwrite ($bf,full_tag("TIMEEND",6,false,$stu->timeend));
fwrite ($bf,full_tag("TIME",6,false,$stu->time));
fwrite ($bf,full_tag("TIMEACCESS",6,false,$stu->timeaccess));
//Print ROLE end
fwrite ($bf,end_tag("ROLE",5,true));
}
//Needed
if ($user->isneeded!==false) {
//Print ROLE start
fwrite ($bf,start_tag("ROLE",5,true));
//Print Role info
fwrite ($bf,full_tag("TYPE",6,false,"needed"));
//Print ROLE end
fwrite ($bf,end_tag("ROLE",5,true));
}
//End ROLES tag
fwrite ($bf,end_tag("ROLES",4,true));
}
//End User tag
fwrite ($bf,end_tag("USER",3,true));
//Do some output
$counter++;
if ($counter % 10 == 0) {
echo ".";
if ($counter % 200 == 0) {
echo "<br>";
}
backup_flush(300);
}
}
//End Users tag
fwrite ($bf,end_tag("USERS",2,true));
} else {
// There aren't any users.
$status = true;
}
return $status;
}
//Backup log info (time ordered)
function backup_log_info($bf,$preferences) {
global $CFG;
//Number of records to get in every chunk
$recordset_size = 1000;
$status = true;
//Counter, points to current record
$counter = 0;
//Count records
$count_logs = count_records("log","course",$preferences->backup_course);
//Pring logs header
if ($count_logs > 0 ) {
fwrite ($bf,start_tag("LOGS",2,true));
}
while ($counter < $count_logs) {
//Get a chunk of records
$logs = get_records ("log","course",$preferences->backup_course,"time","*",$counter,$recordset_size);
//We have logs
if ($logs) {
//Iterate
foreach ($logs as $log) {
//See if it is a valid module to backup
if ($log->module == "course" or
$log->module == "user" or
$preferences->mods[$log->module]->backup == 1) {
//Begin log tag
fwrite ($bf,start_tag("LOG",3,true));
//Output log tag
fwrite ($bf,full_tag("ID",4,false,$log->id));
fwrite ($bf,full_tag("TIME",4,false,$log->time));
fwrite ($bf,full_tag("USERID",4,false,$log->userid));
fwrite ($bf,full_tag("IP",4,false,$log->ip));
fwrite ($bf,full_tag("MODULE",4,false,$log->module));
fwrite ($bf,full_tag("ACTION",4,false,$log->action));
fwrite ($bf,full_tag("URL",4,false,$log->url));
fwrite ($bf,full_tag("INFO",4,false,$log->info));
//End log tag
fwrite ($bf,end_tag("LOG",3,true));
}
//Do some output
$counter++;
if ($counter % 10 == 0) {
echo ".";
if ($counter % 200 == 0) {
echo "<br>";
}
backup_flush(300);
}
}
}
}
//End logs tag
if ($count_logs > 0 ) {
$status = fwrite ($bf,end_tag("LOGS",2,true));
}
return $status;
}
//Backup scales info (common and course scales)
function backup_scales_info($bf,$preferences) {
global $CFG;
$status = true;
//Counter, points to current record
$counter = 0;
//Get scales (common and course scales)
$scales = get_records_sql("SELECT id, courseid, userid, name, scale, description, timemodified
FROM {$CFG->prefix}scale
WHERE courseid = '0' or courseid = $preferences->backup_course");
//Pring scales header
if ($scales) {
//Pring scales header
fwrite ($bf,start_tag("SCALES",2,true));
//Iterate
foreach ($scales as $scale) {
//Begin scale tag
fwrite ($bf,start_tag("SCALE",3,true));
//Output scale tag
fwrite ($bf,full_tag("ID",4,false,$scale->id));
fwrite ($bf,full_tag("COURSEID",4,false,$scale->courseid));
fwrite ($bf,full_tag("USERID",4,false,$scale->userid));
fwrite ($bf,full_tag("NAME",4,false,$scale->name));
fwrite ($bf,full_tag("SCALETEXT",4,false,$scale->scale));
fwrite ($bf,full_tag("DESCRIPTION",4,false,$scale->description));
fwrite ($bf,full_tag("TIMEMODIFIED",4,false,$scale->timemodified));
//End scale tag
fwrite ($bf,end_tag("SCALE",3,true));
}
//End scales tag
$status = fwrite ($bf,end_tag("SCALES",2,true));
}
return $status;
}
//Start the modules tag
function backup_modules_start ($bf,$preferences) {
return fwrite ($bf,start_tag("MODULES",2,true));
}
//End the modules tag
function backup_modules_end ($bf,$preferences) {
return fwrite ($bf,end_tag("MODULES",2,true));
}
//This function makes all the necesary calls to every mod
//to export itself and its files !!!
function backup_module($bf,$preferences,$module) {
global $CFG;
$status = true;
//First, re-check if necessary functions exists
$modbackup = $module."_backup_mods";
if (function_exists($modbackup)) {
//Call the function
$status = $modbackup($bf,$preferences);
} else {
//Something was wrong. Function should exist.
$status = false;
}
return $status;
}
//This function copies all the needed files under the "users" directory to the "user_files"
//directory under temp/backup
function backup_copy_user_files ($preferences) {
global $CFG;
$status = true;
//First we check to "user_files" exists and create it as necessary
//in temp/backup/$backup_code dir
$status = check_and_create_user_files_dir($preferences->backup_unique_code);
//Now iterate over directories under "users" to check if that user must be
//copied to backup
$rootdir = $CFG->dataroot."/users";
//Check if directory exists
if (is_dir($rootdir)) {
$list = list_directories ($rootdir);
if ($list) {
//Iterate
foreach ($list as $dir) {
//Look for dir like username in backup_ids
$data = get_record ("backup_ids","backup_code",$preferences->backup_unique_code,