mirror of
https://github.com/moodle/moodle.git
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691 lines
26 KiB
PHP
691 lines
26 KiB
PHP
<?PHP //$Id$
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//This file contains all the code needed to execute scheduled backups
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//This function is executed via moodle cron
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//It prepares all the info and execute backups as necessary
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function schedule_backup_cron() {
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global $CFG;
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$status = true;
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$emailpending = false;
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//Check for required functions...
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if(!function_exists('utf8_encode')) {
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echo " ERROR: You need to add XML support to your PHP installation!\n";
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return true;
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}
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//Get now
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$now = time();
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//First of all, we have to see if the scheduled is active and detect
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//that there isn't another cron running
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echo " Checking backup status";
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$backup_config = backup_get_config();
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if(!isset($backup_config->backup_sche_active) || !$backup_config->backup_sche_active) {
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echo "...INACTIVE\n";
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return true;
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} else if (isset($backup_config->backup_sche_running) && $backup_config->backup_sche_running) {
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echo "...RUNNING\n";
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//Now check if it's a really running task or something very old looking
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//for info in backup_logs to unlock status as necessary
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$timetosee = 1800; //Half an hour looking for activity
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$timeafter = time() - $timetosee;
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$numofrec = count_records_select ("backup_log","time > $timeafter");
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if (!$numofrec) {
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$timetoseemin = $timetosee/60;
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echo " No activity in last ".$timetoseemin." minutes. Unlocking status\n";
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} else {
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echo " Scheduled backup seems to be running. Execution delayed\n";
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return true;
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}
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} else {
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echo "...OK\n";
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//Mark backup_sche_running
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backup_set_config("backup_sche_running","1");
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}
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//Now we get the main admin user (we'll use his timezone, mail...)
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echo " Getting admin info\n";
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$admin = get_admin();
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if (!$admin) {
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$status = false;
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}
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//Now we get a list of courses in the server
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if ($status) {
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echo " Checking courses\n";
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$courses = get_records("course");
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//For each course, we check (insert, update) the backup_course table
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//with needed data
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foreach ($courses as $course) {
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if ($status) {
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echo " $course->fullname\n";
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//We check if the course exists in backup_course
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$backup_course = get_record("backup_courses","courseid",$course->id);
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//If it doesn't exist, create
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if (!$backup_course) {
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$temp_backup_course->courseid = $course->id;
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$newid = insert_record("backup_courses",$temp_backup_course);
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//And get it from db
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$backup_course = get_record("backup_courses","id",$newid);
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}
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//If it doesn't exist now, error
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if (!$backup_course) {
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echo " ERROR (in backup_courses detection)\n";
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$status = false;
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}
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//Now we backup every course with nextstarttime < now
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if ($backup_course->nextstarttime > 0 && $backup_course->nextstarttime < $now) {
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//Set laststarttime
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$starttime = time();
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set_field("backup_courses","laststarttime",$starttime,"courseid",$backup_course->courseid);
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//Launch backup
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$course_status = schedule_backup_launch_backup($course,$starttime);
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//We have to send a email because we have included at least one backup
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$emailpending = true;
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//Set lastendtime
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set_field("backup_courses","lastendtime",time(),"courseid",$backup_course->courseid);
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//Set laststatus
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if ($course_status) {
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set_field("backup_courses","laststatus","1","courseid",$backup_course->courseid);
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} else {
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set_field("backup_courses","laststatus","0","courseid",$backup_course->courseid);
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}
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}
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//Now, calculate next execution of the course
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$nextstarttime = schedule_backup_next_execution ($backup_course,$backup_config,$now,$admin->timezone);
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//Save it to db
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set_field("backup_courses","nextstarttime",$nextstarttime,"courseid",$backup_course->courseid);
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//Print it to screen as necessary
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$showtime = "undefined";
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if ($nextstarttime > 0) {
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$showtime = userdate($nextstarttime,"",$admin->timezone);
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}
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echo " Next execution: $showtime\n";
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}
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}
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}
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//Delete old logs
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if (!empty($CFG->loglifetime)) {
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echo " Deleting old logs\n";
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$loglifetime = $now - ($CFG->loglifetime * 86400);
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delete_records_select("backup_log", "laststarttime < '$loglifetime'");
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}
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//Send email to admin
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if ($emailpending) {
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echo " Sending email to admin\n";
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$message = "";
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//Build the message text (future versions should handle html messages too!!)
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$logs = get_records_select ("backup_log","laststarttime >= '$now'","id");
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if ($logs) {
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$currentcourse = 1;
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foreach ($logs as $log) {
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if ($currentcourse != $log->courseid) {
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$message .= "\n==================================================\n\n";
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$currentcourse = $log->courseid;
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}
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$message .= userdate($log->time,"%T",$admin->timezone)." ".$log->info."\n";
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}
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}
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//Send the message
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$site = get_site();
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email_to_user($admin,$admin,"$site->shortname: ".get_string("scheduledbackupstatus"),$message);
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}
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//Everything is finished stop backup_sche_running
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backup_set_config("backup_sche_running","0");
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return $status;
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}
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//This function executes the ENTIRE backup of a course (passed as parameter)
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//using all the scheduled backup preferences
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function schedule_backup_launch_backup($course,$starttime = 0) {
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$preferences = false;
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$status = false;
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echo " Executing backup\n";
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schedule_backup_log($starttime,$course->id,"Start backup course $course->fullname");
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schedule_backup_log($starttime,$course->id," Phase 1: Checking and counting:");
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$preferences = schedule_backup_course_configure($course,$starttime);
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if ($preferences) {
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schedule_backup_log($starttime,$course->id," Phase 2: Executing and copying:");
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$status = schedule_backup_course_execute($preferences,$starttime);
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}
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if ($status && $preferences) {
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//Only if the backup_sche_keep is set
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if ($preferences->backup_keep) {
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schedule_backup_log($starttime,$course->id," Phase 3: Deleting old backup files:");
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$status = schedule_backup_course_delete_old_files($preferences,$starttime);
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}
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}
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if ($status && $preferences) {
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echo " End backup OK\n";
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schedule_backup_log($starttime,$course->id,"End backup course $course->fullname - OK");
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} else {
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echo " End backup with ERROR\n";
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schedule_backup_log($starttime,$course->id,"End backup course $course->fullname - ERROR!!");
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}
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return $status && $preferences;
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}
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//This function saves to backup_log all the needed process info
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//to use it later. NOTE: If $starttime = 0 no info in saved
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function schedule_backup_log($starttime,$courseid,$message) {
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if ($starttime) {
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$log->courseid = $courseid;
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$log->time = time();
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$log->laststarttime = $starttime;
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$log->info = $message;
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insert_record ("backup_log",$log);
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}
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}
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//This function returns the next future GMT time to execute the course based in the
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//configuration of the scheduled backups
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function schedule_backup_next_execution ($backup_course,$backup_config,$now,$timezone) {
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$result = -1;
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//Get today's midnight GMT
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$midnight = usergetmidnight($now,$timezone);
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//Get today's day of week (0=Sunday...6=Saturday)
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$date = usergetdate($now,$timezone);
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$dayofweek = $date['wday'];
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//Get number of days (from today) to execute backups
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$scheduled_days = substr($backup_config->backup_sche_weekdays,$dayofweek).
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$backup_config->backup_sche_weekdays;
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$daysfromtoday = strpos($scheduled_days, "1");
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//If some day has been found
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if ($daysfromtoday !== false) {
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//Calculate distance
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$dist = ($daysfromtoday * 86400) + //Days distance
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($backup_config->backup_sche_hour*3600) + //Hours distance
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($backup_config->backup_sche_minute*60); //Minutes distance
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$result = $midnight + $dist;
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}
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//If that time is past, call the function recursively to obtain the next valid day
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if ($result > 0 && $result < time()) {
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$result = schedule_backup_next_execution ($backup_course,$backup_config,$now + 86400,$timezone);
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}
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return $result;
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}
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//This function implements all the needed code to prepare a course
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//to be in backup (insert temp info into backup temp tables).
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function schedule_backup_course_configure($course,$starttime = 0) {
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global $CFG;
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$status = true;
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schedule_backup_log($starttime,$course->id," checking parameters");
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//Check the required variable
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if (empty($course->id)) {
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$status = false;
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}
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//Get scheduled backup preferences
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$backup_config = backup_get_config();
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//Checks backup_config pairs exist
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if ($status) {
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if (!isset($backup_config->backup_sche_modules)) {
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$backup_config->backup_sche_modules = 1;
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}
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if (!isset($backup_config->backup_sche_withuserdata)) {
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$backup_config->backup_sche_withuserdata = 1;
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}
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if (!isset($backup_config->backup_sche_users)) {
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$backup_config->backup_sche_users = 1;
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}
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if (!isset($backup_config->backup_sche_logs)) {
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$backup_config->backup_sche_logs = 0;
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}
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if (!isset($backup_config->backup_sche_userfiles)) {
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$backup_config->backup_sche_userfiles = 1;
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}
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if (!isset($backup_config->backup_sche_coursefiles)) {
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$backup_config->backup_sche_coursefiles = 1;
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}
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if (!isset($backup_config->backup_sche_active)) {
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$backup_config->backup_sche_active = 0;
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}
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if (!isset($backup_config->backup_sche_weekdays)) {
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$backup_config->backup_sche_weekdays = "0000000";
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}
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if (!isset($backup_config->backup_sche_hour)) {
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$backup_config->backup_sche_hour = 00;
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}
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if (!isset($backup_config->backup_sche_minute)) {
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$backup_config->backup_sche_minute = 00;
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}
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if (!isset($backup_config->backup_sche_destination)) {
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$backup_config->backup_sche_destination = "";
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}
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if (!isset($backup_config->backup_sche_keep)) {
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$backup_config->backup_sche_keep = 1;
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}
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}
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if ($status) {
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//Checks for the required files/functions to backup every mod
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//And check if there is data about it
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$count = 0;
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if ($allmods = get_records("modules") ) {
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foreach ($allmods as $mod) {
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$modname = $mod->name;
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$modfile = "$CFG->dirroot/mod/$modname/backuplib.php";
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$modbackup = $modname."_backup_mods";
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$modcheckbackup = $modname."_check_backup_mods";
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if (file_exists($modfile)) {
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include_once($modfile);
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if (function_exists($modbackup) and function_exists($modcheckbackup)) {
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$var = "exists_".$modname;
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$$var = true;
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$count++;
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}
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}
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//Check data
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//Check module info
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$var = "backup_".$modname;
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if (!isset($$var)) {
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$$var = $backup_config->backup_sche_modules;
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}
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//Now stores all the mods preferences into an array into preferences
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$preferences->mods[$modname]->backup = $$var;
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//Check include user info
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$var = "backup_user_info_".$modname;
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if (!isset($$var)) {
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$$var = $backup_config->backup_sche_withuserdata;
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}
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//Now stores all the mods preferences into an array into preferences
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$preferences->mods[$modname]->userinfo = $$var;
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//And the name of the mod
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$preferences->mods[$modname]->name = $modname;
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}
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}
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}
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//Convert other parameters
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if ($status) {
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$preferences->backup_users = $backup_config->backup_sche_users;
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$preferences->backup_logs = $backup_config->backup_sche_logs;
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$preferences->backup_user_files = $backup_config->backup_sche_userfiles;
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$preferences->backup_course_files = $backup_config->backup_sche_coursefiles;
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$preferences->backup_course = $course->id;
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$preferences->backup_destination = $backup_config->backup_sche_destination;
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$preferences->backup_keep = $backup_config->backup_sche_keep;
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}
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//Calculate the backup string
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if ($status) {
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schedule_backup_log($starttime,$course->id," calculating backup name");
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//Calculate the backup word
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//Take off some characters in the filename !!
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$takeoff = array(" ", ":", "/", "\\", "|");
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$backup_word = str_replace($takeoff,"_",strtolower(get_string("backupfilename")));
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//If non-translated, use "backup"
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if (substr($backup_word,0,1) == "[") {
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$backup_word= "backup";
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}
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//Calculate the date format string
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$backup_date_format = str_replace(" ","_",get_string("backupnameformat"));
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//If non-translated, use "%Y%m%d-%H%M"
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if (substr($backup_date_format,0,1) == "[") {
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$backup_date_format = "%%Y%%m%%d-%%H%%M";
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}
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//Calculate the shortname
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$backup_shortname = clean_filename($course->shortname);
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if (empty($backup_shortname) or $backup_shortname == '_' ) {
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$backup_shortname = $course->id;
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}
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//Calculate the final backup filename
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//The backup word
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$backup_name = $backup_word."-";
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//The shortname
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$backup_name .= strtolower($backup_shortname)."-";
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//The date format
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$backup_name .= userdate(time(),$backup_date_format,99,false);
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//The extension
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$backup_name .= ".zip";
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//Calculate the string to match the keep preference
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$keep_name = $backup_word."-";
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//The shortname
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$keep_name .= strtolower($backup_shortname)."-";
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$preferences->backup_name = $backup_name;
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$preferences->keep_name = $keep_name;
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}
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//Calculate the backup unique code to allow simultaneus backups (to define
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//the temp-directory name and records in backup temp tables
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if ($status) {
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$backup_unique_code = time();
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$preferences->backup_unique_code = $backup_unique_code;
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}
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//Calculate necesary info to backup modules
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if ($status) {
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schedule_backup_log($starttime,$course->id," calculating modules data");
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if ($allmods = get_records("modules") ) {
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foreach ($allmods as $mod) {
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$modname = $mod->name;
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$modbackup = $modname."_backup_mods";
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//If exists the lib & function
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$var = "exists_".$modname;
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if (isset($$var) && $$var) {
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//Add hidden fields
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$var = "backup_".$modname;
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//Only if selected
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if ($$var == 1) {
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$var = "backup_user_info_".$modname;
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//Call the check function to show more info
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$modcheckbackup = $modname."_check_backup_mods";
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schedule_backup_log($starttime,$course->id," $modname");
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$modcheckbackup($course->id,$$var,$backup_unique_code);
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}
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}
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}
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}
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}
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//Now calculate the users
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if ($status) {
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schedule_backup_log($starttime,$course->id," calculating users");
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user_check_backup($course->id,$backup_unique_code,$preferences->backup_users);
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}
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//Now calculate the logs
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if ($status) {
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if ($preferences->backup_logs) {
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schedule_backup_log($starttime,$course->id," calculating logs");
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log_check_backup($course->id);
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}
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}
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//Now calculate the userfiles
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if ($status) {
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if ($preferences->backup_user_files) {
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schedule_backup_log($starttime,$course->id," calculating user files");
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user_files_check_backup($course->id,$preferences->backup_unique_code);
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}
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}
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//Now calculate the coursefiles
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if ($status) {
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if ($preferences->backup_course_files) {
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schedule_backup_log($starttime,$course->id," calculating course files");
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course_files_check_backup($course->id,$preferences->backup_unique_code);
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}
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}
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//If everything is ok, return calculated preferences
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if ($status) {
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$status = $preferences;
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}
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return $status;
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}
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//This function implements all the needed code to backup a course
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//copying it to the desired destination (default if not specified)
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function schedule_backup_course_execute($preferences,$starttime = 0) {
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global $CFG;
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$status = true;
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//Another Info to add
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$preferences->moodle_version = $CFG->version;
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$preferences->moodle_release = $CFG->release;
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$preferences->backup_version = $CFG->backup_version;
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$preferences->backup_release = $CFG->backup_release;
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//Some parts of the backup doesn't know about $preferences, so we
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//put a copy of it inside that CFG (always global) to be able to
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//use it. Then, when needed I search for preferences inside CFG
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//Used to avoid some problems in full_tag() when preferences isn't
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//set globally (i.e. in scheduled backups)
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$CFG->backup_preferences = $preferences;
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//Check for temp and backup and backup_unique_code directory
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//Create them as needed
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schedule_backup_log($starttime,$preferences->backup_course," checking temp structures");
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$status = check_and_create_backup_dir($preferences->backup_unique_code);
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//Empty dir
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if ($status) {
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schedule_backup_log($starttime,$preferences->backup_course," cleaning old data");
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$status = clear_backup_dir($preferences->backup_unique_code);
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}
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//Delete old_entries from backup tables
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if ($status) {
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$status = backup_delete_old_data();
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}
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//Create the moodle.xml file
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if ($status) {
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schedule_backup_log($starttime,$preferences->backup_course," creating backup file");
|
|
//Obtain the xml file (create and open) and print prolog information
|
|
$backup_file = backup_open_xml($preferences->backup_unique_code);
|
|
//Prints general info about backup to file
|
|
if ($backup_file) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," general info");
|
|
$status = backup_general_info($backup_file,$preferences);
|
|
} else {
|
|
$status = false;
|
|
}
|
|
|
|
//Prints course start (tag and general info)
|
|
if ($status) {
|
|
$status = backup_course_start($backup_file,$preferences);
|
|
}
|
|
|
|
//Section info
|
|
if ($status) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," sections info");
|
|
$status = backup_course_sections($backup_file,$preferences);
|
|
}
|
|
|
|
//User info
|
|
if ($status) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," user info");
|
|
$status = backup_user_info($backup_file,$preferences);
|
|
}
|
|
|
|
//If we have selected to backup quizzes, backup categories and
|
|
//questions structure (step 1). See notes on mod/quiz/backuplib.php
|
|
if ($status and $preferences->mods['quiz']->backup) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," categories & questions");
|
|
$status = quiz_backup_question_categories($backup_file,$preferences);
|
|
}
|
|
|
|
//Print logs if selected
|
|
if ($status) {
|
|
if ($preferences->backup_logs) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," logs");
|
|
$status = backup_log_info($backup_file,$preferences);
|
|
}
|
|
}
|
|
|
|
//Print scales info
|
|
if ($status) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," scales");
|
|
$status = backup_scales_info($backup_file,$preferences);
|
|
}
|
|
|
|
//Print groups info
|
|
if ($status) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," groups");
|
|
$status = backup_groups_info($backup_file,$preferences);
|
|
}
|
|
|
|
//Print events info
|
|
if ($status) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," events");
|
|
$status = backup_events_info($backup_file,$preferences);
|
|
}
|
|
|
|
//Module info, this unique function makes all the work!!
|
|
//db export and module fileis copy
|
|
if ($status) {
|
|
$mods_to_backup = false;
|
|
//Check if we have any mod to backup
|
|
foreach ($preferences->mods as $module) {
|
|
if ($module->backup) {
|
|
$mods_to_backup = true;
|
|
}
|
|
}
|
|
//If we have to backup some module
|
|
if ($mods_to_backup) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," modules");
|
|
//Start modules tag
|
|
$status = backup_modules_start ($backup_file,$preferences);
|
|
//Iterate over modules and call backup
|
|
foreach ($preferences->mods as $module) {
|
|
if ($module->backup and $status) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," $module->name");
|
|
$status = backup_module($backup_file,$preferences,$module->name);
|
|
}
|
|
}
|
|
//Close modules tag
|
|
$status = backup_modules_end ($backup_file,$preferences);
|
|
}
|
|
}
|
|
|
|
//Prints course end
|
|
if ($status) {
|
|
$status = backup_course_end($backup_file,$preferences);
|
|
}
|
|
|
|
//Close the xml file and xml data
|
|
if ($backup_file) {
|
|
backup_close_xml($backup_file);
|
|
}
|
|
}
|
|
|
|
//Now, if selected, copy user files
|
|
if ($status) {
|
|
if ($preferences->backup_user_files) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," copying user files");
|
|
$status = backup_copy_user_files ($preferences);
|
|
}
|
|
}
|
|
|
|
//Now, if selected, copy course files
|
|
if ($status) {
|
|
if ($preferences->backup_course_files) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," copying course files");
|
|
$status = backup_copy_course_files ($preferences);
|
|
}
|
|
}
|
|
|
|
//Now, zip all the backup directory contents
|
|
if ($status) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," zipping files");
|
|
$status = backup_zip ($preferences);
|
|
}
|
|
|
|
//Now, copy the zip file to course directory
|
|
if ($status) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," copying backup");
|
|
$status = copy_zip_to_course_dir ($preferences);
|
|
}
|
|
|
|
//Now, clean temporary data (db and filesystem)
|
|
if ($status) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," cleaning temp data");
|
|
$status = clean_temp_data ($preferences);
|
|
}
|
|
|
|
//Unset CFG->backup_preferences only needed in scheduled backups
|
|
unset ($CFG->backup_preferences);
|
|
|
|
return $status;
|
|
}
|
|
|
|
//This function deletes old backup files when the "keep" limit has been reached
|
|
//in the destination directory.
|
|
function schedule_backup_course_delete_old_files($preferences,$starttime=0) {
|
|
|
|
global $CFG;
|
|
|
|
$status = true;
|
|
|
|
//Calculate the directory to check
|
|
$dirtocheck = "";
|
|
//if $preferences->backup_destination isn't empty, then check that directory
|
|
if (!empty($preferences->backup_destination)) {
|
|
$dirtocheck = $preferences->backup_destination;
|
|
//else calculate standard backup directory location
|
|
} else {
|
|
$dirtocheck = $CFG->dataroot."/".$preferences->backup_course."/backupdata";
|
|
}
|
|
schedule_backup_log($starttime,$preferences->backup_course," checking $dirtocheck");
|
|
echo " Keeping backup files in $dirtocheck\n";
|
|
|
|
//Get all the files in $dirtocheck
|
|
$files = get_directory_list($dirtocheck,"",false);
|
|
//Get all matching files ($preferences->keep_name) from $files
|
|
$matchingfiles = array();
|
|
foreach ($files as $file) {
|
|
if (substr($file, 0, strlen($preferences->keep_name)) == $preferences->keep_name) {
|
|
$modifieddate = filemtime($dirtocheck."/".$file);
|
|
$matchingfiles[$modifieddate] = $file;
|
|
}
|
|
}
|
|
//Sort by key (modified date) to get the oldest first (instead of doing that by name
|
|
//because it could give us problems in some languages with different format names).
|
|
ksort($matchingfiles);
|
|
|
|
//Count matching files
|
|
$countmatching = count($matchingfiles);
|
|
schedule_backup_log($starttime,$preferences->backup_course," found $countmatching backup files");
|
|
echo " found $countmatching backup files\n";
|
|
if ($preferences->backup_keep < $countmatching) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," keep limit ($preferences->backup_keep) reached. Deleting old files");
|
|
echo " keep limit ($preferences->backup_keep) reached. Deleting old files\n";
|
|
$filestodelete = $countmatching - $preferences->backup_keep;
|
|
$filesdeleted = 0;
|
|
foreach ($matchingfiles as $matchfile) {
|
|
if ($filesdeleted < $filestodelete) {
|
|
schedule_backup_log($starttime,$preferences->backup_course," $matchfile deleted");
|
|
echo " $matchfile deleted\n";
|
|
$filetodelete = $dirtocheck."/".$matchfile;
|
|
unlink($filetodelete);
|
|
$filesdeleted++;
|
|
}
|
|
}
|
|
}
|
|
return $status;
|
|
}
|
|
|
|
?>
|