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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
//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_messages) {
//$backup_users=0-->all
// 1-->course (needed + enrolled)
// 2-->none
global $CFG;
global $db;
$count_users = 0;
//If we've selected none, simply return 0
if ($backup_users == 0 or $backup_users == 1) {
//Calculate needed users (calling every xxxx_get_participants function + scales users)
$needed_users = backup_get_needed_users($course, $backup_messages);
//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)) {
$backupable_user->info .= "student";
}
//Is needed user (exists in needed_users)
if (isset($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, $includemessages=false) {
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 scale 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 = $scaleuser->userid;
}
}
}
//Now, add message users if necessary
if ($includemessages) {
include_once("$CFG->dirroot/message/lib.php");
//Get users
$messageusers = message_get_participants();
//Add message users to results
if ($messageusers) {
foreach ($messageusers as $messageuser) {
//If id != 0
if ($messageuser->id !=0) {
$result[$messageuser->id]->id = $messageuser->id;
}
}
}
}
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)) {
//Get directories without descend
$userdirs = get_directory_list($rootdir,"",false,true,false);
foreach ($userdirs 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
('$backup_unique_code','user','".addslashes($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)) {
//Get files and directories without descend
$coursedirs = get_directory_list($rootdir,$CFG->moddata,false,true,true);
$backupdata_dir = "backupdata";
foreach ($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
('$backup_unique_code','course','".addslashes($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 $status;
}
//Function to check and create the "group_files" dir to
//save all the user files we need from "groups" dir
function check_and_create_group_files_dir($backup_unique_code) {
global $CFG;
$status = check_dir_exists($CFG->dataroot."/temp/backup/".$backup_unique_code."/group_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,$attributes=null) {
if ($endline) {
$endchar = "\n";
} else {
$endchar = "";
}
$attrstring = '';
if (!empty($attributes) && is_array($attributes)) {
foreach ($attributes as $key => $value) {
$attrstring .= " ".xml_tag_safe_content($key)."=\"".
xml_tag_safe_content($value)."\"";
}
}
return str_repeat(" ",$level*2)."<".strtoupper($tag).$attrstring.">".$endchar;
}
//Return the xml end tag
function end_tag($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,$attributes=null) {
global $CFG;
//Here we encode absolute links
$content = backup_encode_absolute_links($content);
$st = start_tag($tag,$level,$endline,$attributes);
$co = xml_tag_safe_content($content);
$et = end_tag($tag,0,true);
return $st.$co.$et;
}
function xml_tag_safe_content($content) {
global $CFG;
//If enabled, we strip all the control chars (\x0-\x1f) from the text but tabs (\x9),
//newlines (\xa) and returns (\xd). The delete control char (\x7f) is also included.
//because they are forbiden in XML 1.0 specs. The expression below seems to be
//UTF-8 safe too because it simply ignores the rest of characters.
$content = preg_replace("/[\x-\x8\xb-\xc\xe-\x1f\x7f]/is","",$content);
if (!empty($CFG->unicodedb)) {
// Don't perform the conversion. Contents are Unicode.
$content = preg_replace("/\r\n|\r/", "\n", htmlspecialchars($content));
} else {
// Perform the conversion. Contents aren't Unicode.
$content = preg_replace("/\r\n|\r/", "\n", utf8_encode(htmlspecialchars($content)));
}
return $content;
}
//Prints General info about the course
//name, moodle_version (internal and release), backup_version, date, info in file...
function backup_general_info ($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));
//The original site wwwroot
fwrite ($bf,full_tag("ORIGINAL_WWWROOT",2,false,$CFG->wwwroot));
//The zip method used
if (!empty($CFG->zip)) {
$zipmethod = 'external';
} else {
$zipmethod = 'internal';
}
fwrite ($bf,full_tag("ZIP_METHOD",2,false,$zipmethod));
//Te includes tag
fwrite ($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));
if (isset($preferences->mods[$element->name]->instances)
&& is_array($preferences->mods[$element->name]->instances)
&& count($preferences->mods[$element->name]->instances)) {
fwrite ($bf, start_tag("INSTANCES",4,true));
foreach ($preferences->mods[$element->name]->instances as $id => $object) {
if (!empty($object->backup)) {
//Calculate info
$included = "false";
$userinfo = "false";
if ($object->backup) {
$included = "true";
if ($object->userinfo) {
$userinfo = "true";
}
}
fwrite ($bf, start_tag("INSTANCE",5,true));
fwrite ($bf, full_tag("ID",5,false,$id));
fwrite ($bf, full_tag("NAME",5,false,$object->name));
fwrite ($bf, full_tag("INCLUDED",5,false,$included)) ;
fwrite ($bf, full_tag("USERINFO",5,false,$userinfo));
fwrite ($bf, end_tag("INSTANCE",5,true));
}
}
fwrite ($bf, end_tag("INSTANCES",4,true));
}
//Print the end
fwrite ($bf,end_tag("MOD",3,true));
}
//The metacourse in backup
if ($preferences->backup_metacourse == 1) {
fwrite ($bf,full_tag("METACOURSE",3,false,"true"));
} else {
fwrite ($bf,full_tag("METACOURSE",3,false,"false"));
}
//The user in backup
if ($preferences->backup_users == 1) {
fwrite ($bf,full_tag("USERS",3,false,"course"));
} else if ($preferences->backup_users == 0) {
fwrite ($bf,full_tag("USERS",3,false,"all"));
} else {
fwrite ($bf,full_tag("USERS",3,false,"none"));
}
//The logs in backup
if ($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"));
}
//The messages in backup
if ($preferences->backup_messages == 1 && $preferences->backup_course == SITEID) {
fwrite ($bf,full_tag("MESSAGES",3,false,"true"));
} else {
fwrite ($bf,full_tag("MESSAGES",3,false,"false"));
}
//The mode of writing the block data
fwrite ($bf,full_tag('BLOCKFORMAT',3,false,'instances'));
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
$course = get_record("course","id",$preferences->backup_course);
if ($course) {
//Prints course info
fwrite ($bf,full_tag("ID",3,false,$course->id));
//Obtain the category
$category = get_record("course_categories","id","$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("IDNUMBER",3,false,$course->idnumber));
fwrite ($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("ENROLPERIOD",3,false,$course->enrolperiod));
fwrite ($bf,full_tag("NUMSECTIONS",3,false,$course->numsections));
//fwrite ($bf,full_tag("SHOWRECENT",3,false,$course->showrecent)); INFO: This is out in 1.3
fwrite ($bf,full_tag("MAXBYTES",3,false,$course->maxbytes));
fwrite ($bf,full_tag("SHOWREPORTS",3,false,$course->showreports));
fwrite ($bf,full_tag("GROUPMODE",3,false,$course->groupmode));
fwrite ($bf,full_tag("GROUPMODEFORCE",3,false,$course->groupmodeforce));
fwrite ($bf,full_tag("LANG",3,false,$course->lang));
fwrite ($bf,full_tag("THEME",3,false,$course->theme));
fwrite ($bf,full_tag("COST",3,false,$course->cost));
fwrite ($bf,full_tag("CURRENCY",3,false,$course->currency));
fwrite ($bf,full_tag("MARKER",3,false,$course->marker));
fwrite ($bf,full_tag("VISIBLE",3,false,$course->visible));
fwrite ($bf,full_tag("HIDDENSECTIONS",3,false,$course->hiddensections));
fwrite ($bf,full_tag("TIMECREATED",3,false,$course->timecreated));
fwrite ($bf,full_tag("TIMEMODIFIED",3,false,$course->timemodified));
//If not selected, force metacourse to 0
if (!$preferences->backup_metacourse) {
$status = fwrite ($bf,full_tag("METACOURSE",3,false,'0'));
//else, export the field as is in DB
} else {
$status = fwrite ($bf,full_tag("METACOURSE",3,false,$course->metacourse));
}
//Print header end
fwrite ($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 $status;
}
//Prints course's metacourse info (table course_meta)
function backup_course_metacourse ($bf,$preferences) {
global $CFG;
$status = true;
//Get info from meta
$parents = get_records_sql ("SELECT m.*, c.idnumber, c.shortname
FROM {$CFG->prefix}course_meta m,
{$CFG->prefix}course c
WHERE m.child_course = '$preferences->backup_course' AND
m.parent_course = c.id");
$childs = get_records_sql ("SELECT m.*, c.idnumber, c.shortname
FROM {$CFG->prefix}course_meta m,
{$CFG->prefix}course c
WHERE m.parent_course = '$preferences->backup_course' AND
m.child_course = c.id");
if ($parents || $childs) {
//metacourse open tag
fwrite ($bf,start_tag("METACOURSE",2,true));
if ($parents) {
fwrite($bf, start_tag("PARENTS",3,true));
//Iterate over every parent
foreach ($parents as $parent) {
//Begin parent
fwrite ($bf,start_tag("PARENT",4,true));
fwrite ($bf,full_tag("ID",5,false,$parent->parent_course));
fwrite ($bf,full_tag("IDNUMBER",5,false,$parent->idnumber));
fwrite ($bf,full_tag("SHORTNAME",5,false,$parent->shortname));
//End parent
fwrite ($bf,end_tag("PARENT",4,true));
}
fwrite ($bf,end_tag("PARENTS",3,true));
}
if ($childs) {
fwrite($bf, start_tag("CHILDS",3,true));
//Iterate over every child
foreach ($childs as $child) {
//Begin parent
fwrite ($bf,start_tag("CHILD",4,true));
fwrite ($bf,full_tag("ID",5,false,$child->child_course));
fwrite ($bf,full_tag("IDNUMBER",5,false,$child->idnumber));
fwrite ($bf,full_tag("SHORTNAME",5,false,$child->shortname));
//End parent
fwrite ($bf,end_tag("CHILD",4,true));
}
fwrite ($bf,end_tag("CHILDS",3,true));
}
//metacourse close tag
$status = fwrite ($bf,end_tag("METACOURSE",3,true));
}
return $status;
}
//Prints course's messages info (tables message, message_read and message_contacts)
function backup_messages ($bf,$preferences) {
global $CFG;
$status = true;
//Get info from messages
$unreads = get_records ('message');
$reads = get_records ('message_read');
$contacts= get_records ('message_contacts');
if ($unreads || $reads || $contacts) {
$counter = 0;
//message open tag
fwrite ($bf,start_tag("MESSAGES",2,true));
if ($unreads) {
//Iterate over every unread
foreach ($unreads as $unread) {
//start message
fwrite($bf, start_tag("MESSAGE",3,true));
fwrite ($bf,full_tag("ID",4,false,$unread->id));
fwrite ($bf,full_tag("STATUS",4,false,"UNREAD"));
fwrite ($bf,full_tag("USERIDFROM",4,false,$unread->useridfrom));
fwrite ($bf,full_tag("USERIDTO",4,false,$unread->useridto));
fwrite ($bf,full_tag("MESSAGE",4,false,$unread->message));
fwrite ($bf,full_tag("FORMAT",4,false,$unread->format));
fwrite ($bf,full_tag("TIMECREATED",4,false,$unread->timecreated));
fwrite ($bf,full_tag("MESSAGETYPE",4,false,$unread->messagetype));
//end message
fwrite ($bf,end_tag("MESSAGE",3,true));
//Do some output
$counter++;
if ($counter % 20 == 0) {
echo ".";
if ($counter % 400 == 0) {
echo "<br />";
}
backup_flush(300);
}
}
}
if ($reads) {
//Iterate over every read
foreach ($reads as $read) {
//start message
fwrite($bf, start_tag("MESSAGE",3,true));
fwrite ($bf,full_tag("ID",4,false,$read->id));
fwrite ($bf,full_tag("STATUS",4,false,"READ"));
fwrite ($bf,full_tag("USERIDFROM",4,false,$read->useridfrom));
fwrite ($bf,full_tag("USERIDTO",4,false,$read->useridto));
fwrite ($bf,full_tag("MESSAGE",4,false,$read->message));
fwrite ($bf,full_tag("FORMAT",4,false,$read->format));
fwrite ($bf,full_tag("TIMECREATED",4,false,$read->timecreated));
fwrite ($bf,full_tag("MESSAGETYPE",4,false,$read->messagetype));
fwrite ($bf,full_tag("TIMEREAD",4,false,$read->timeread));
fwrite ($bf,full_tag("MAILED",4,false,$read->mailed));
//end message
fwrite ($bf,end_tag("MESSAGE",3,true));
//Do some output
$counter++;
if ($counter % 20 == 0) {
echo ".";
if ($counter % 400 == 0) {
echo "<br />";
}
backup_flush(300);
}
}
}
if ($contacts) {
fwrite($bf, start_tag("CONTACTS",3,true));
//Iterate over every contact
foreach ($contacts as $contact) {
//start contact
fwrite($bf, start_tag("CONTACT",4,true));
fwrite ($bf,full_tag("ID",5,false,$contact->id));
fwrite ($bf,full_tag("USERID",5,false,$contact->userid));
fwrite ($bf,full_tag("CONTACTID",5,false,$contact->contactid));
fwrite ($bf,full_tag("BLOCKED",5,false,$contact->blocked));
//end contact
fwrite ($bf,end_tag("CONTACT",4,true));
//Do some output
$counter++;
if ($counter % 20 == 0) {
echo ".";
if ($counter % 400 == 0) {
echo "<br />";
}
backup_flush(300);
}
}
fwrite($bf, end_tag("CONTACTS",3,true));
}
//messages close tag
$status = fwrite ($bf,end_tag("MESSAGES",2,true));
}
return $status;
}
//Prints course's blocks info (table block_instance)
function backup_course_blocks ($bf,$preferences) {
global $CFG;
$status = true;
// Read all of the block table
$blocks = blocks_get_record();
$pages = array();
$pages[] = page_create_object(PAGE_COURSE_VIEW, $preferences->backup_course);
// Let's see if we have to backup blocks from modules
$modulerecords = get_records_sql('SELECT name, id FROM '.$CFG->prefix.'modules');
foreach($preferences->mods as $module) {
if(!$module->backup) {
continue;
}
$cmods = get_records_select('course_modules', 'course = '.$preferences->backup_course.' AND module = '.$modulerecords[$module->name]->id);
if(empty($cmods)) {
continue;
}
$pagetypes = page_import_types('mod/'.$module->name.'/');
if(empty($pagetypes)) {
continue;
}
foreach($pagetypes as $pagetype) {
foreach($cmods as $cmod) {
$pages[] = page_create_object($pagetype, $cmod->instance);
}
}
}
//Blocks open tag
fwrite ($bf,start_tag('BLOCKS',2,true));
while($page = array_pop($pages)) {
if ($instances = blocks_get_by_page($page)) {
//Iterate over every block
foreach ($instances as $position) {
foreach ($position as $instance) {
//If we somehow have a block with an invalid id, skip it
if(empty($blocks[$instance->blockid]->name)) {
continue;
}
//Begin Block
fwrite ($bf,start_tag('BLOCK',3,true));
fwrite ($bf,full_tag('NAME',4,false,$blocks[$instance->blockid]->name));
fwrite ($bf,full_tag('PAGEID',4,false,$instance->pageid));
fwrite ($bf,full_tag('PAGETYPE',4,false,$instance->pagetype));
fwrite ($bf,full_tag('POSITION',4,false,$instance->position));
fwrite ($bf,full_tag('WEIGHT',4,false,$instance->weight));
fwrite ($bf,full_tag('VISIBLE',4,false,$instance->visible));
fwrite ($bf,full_tag('CONFIGDATA',4,false,$instance->configdata));
//End Block
fwrite ($bf,end_tag('BLOCK',3,true));
}
}
}
}
//Blocks close tag
$status = fwrite ($bf,end_tag('BLOCKS',2,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));
$first_record = false;
}
// if we're doing selected instances, check that too.
if (is_array($preferences->mods[$moduletype]->instances)
&& count($preferences->mods[$moduletype]->instances)
&& (!array_key_exists($course_module[$tok]->instance,$preferences->mods[$moduletype]->instances)
|| empty($preferences->mods[$moduletype]->instances[$course_module[$tok]->instance]->backup))) {
$tok = strtok(",");
continue;
}
//Print mod info from course_modules
fwrite ($bf,start_tag("MOD",5,true));