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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* This script is used to configure and execute the backup proccess.
*
* @package core
* @subpackage backup
* @copyright Moodle
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
define('NO_OUTPUT_BUFFERING', true);
require_once('../config.php');
require_once($CFG->dirroot . '/backup/util/includes/backup_includes.php');
require_once($CFG->dirroot . '/backup/moodle2/backup_plan_builder.class.php');
// Backup of large courses requires extra memory. Use the amount configured
// in admin settings.
raise_memory_limit(MEMORY_EXTRA);
$courseid = required_param('id', PARAM_INT);
$sectionid = optional_param('section', null, PARAM_INT);
$cmid = optional_param('cm', null, PARAM_INT);
$cancel = optional_param('cancel', '', PARAM_ALPHA);
$previous = optional_param('previous', false, PARAM_BOOL);
/**
* Part of the forms in stages after initial, is POST never GET
*/
$backupid = optional_param('backup', false, PARAM_ALPHANUM);
// Determine if we are performing realtime for asynchronous backups.
$backupmode = backup::MODE_GENERAL;
if (async_helper::is_async_enabled()) {
$backupmode = backup::MODE_ASYNC;
}
$courseurl = new moodle_url('/course/view.php', array('id' => $courseid));
$url = new moodle_url('/backup/backup.php', array('id'=>$courseid));
if ($sectionid !== null) {
$url->param('section', $sectionid);
}
if ($cmid !== null) {
$url->param('cm', $cmid);
}
$PAGE->set_url($url);
$PAGE->set_pagelayout('admin');
$id = $courseid;
$cm = null;
$course = $DB->get_record('course', array('id'=>$courseid), '*', MUST_EXIST);
$coursecontext = context_course::instance($course->id);
$contextid = $coursecontext->id;
$type = backup::TYPE_1COURSE;
if (!is_null($sectionid)) {
$section = $DB->get_record('course_sections', array('course'=>$course->id, 'id'=>$sectionid), '*', MUST_EXIST);
$type = backup::TYPE_1SECTION;
$id = $sectionid;
}
if (!is_null($cmid)) {
$cm = get_coursemodule_from_id(null, $cmid, $course->id, false, MUST_EXIST);
$type = backup::TYPE_1ACTIVITY;
$id = $cmid;
}
require_login($course, false, $cm);
switch ($type) {
case backup::TYPE_1COURSE :
require_capability('moodle/backup:backupcourse', $coursecontext);
$heading = get_string('backupcourse', 'backup', $course->shortname);
break;
case backup::TYPE_1SECTION :
require_capability('moodle/backup:backupsection', $coursecontext);
if ((string)$section->name !== '') {
$sectionname = format_string($section->name, true, array('context' => $coursecontext));
$heading = get_string('backupsection', 'backup', $sectionname);
$PAGE->navbar->add($sectionname);
} else {
$heading = get_string('backupsection', 'backup', $section->section);
$PAGE->navbar->add(get_string('section').' '.$section->section);
}
break;
case backup::TYPE_1ACTIVITY :
$activitycontext = context_module::instance($cm->id);
require_capability('moodle/backup:backupactivity', $activitycontext);
$contextid = $activitycontext->id;
$heading = get_string('backupactivity', 'backup', $cm->name);
break;
default :
print_error('unknownbackuptype');
}
$PAGE->set_title($heading);
$PAGE->set_heading($heading);
if (empty($cancel)) {
// Do not print the header if user cancelled the process, as we are going to redirect the user.
echo $OUTPUT->header();
}
// Only let user perform a backup if we aren't in async mode, or if we are
// and there are no pending backups for this item for this user.
if (!async_helper::is_async_pending($id, 'course', 'backup')) {
// The mix of business logic and display elements below makes me sad.
// This needs to refactored into the renderer and seperated out.
if (!($bc = backup_ui::load_controller($backupid))) {
$bc = new backup_controller($type, $id, backup::FORMAT_MOODLE,
backup::INTERACTIVE_YES, $backupmode, $USER->id, backup::RELEASESESSION_YES);
// The backup id did not relate to a valid controller so we made a new controller.
// Now we need to reset the backup id to match the new controller.
$backupid = $bc->get_backupid();
}
// Prepare a progress bar which can display optionally during long-running
// operations while setting up the UI.
$slowprogress = new \core\progress\display_if_slow(get_string('preparingui', 'backup'));
$renderer = $PAGE->get_renderer('core', 'backup');
$backup = new backup_ui($bc);
if ($backup->get_stage() == backup_ui::STAGE_SCHEMA && !$previous) {
// After schema stage, we are probably going to get to the confirmation stage,
// The confirmation stage has 2 sets of progress, so this is needed to prevent
// it showing 2 progress bars.
$twobars = true;
$slowprogress->start_progress('', 2);
} else {
$twobars = false;
}
$backup->get_controller()->set_progress($slowprogress);
$backup->process();
if ($backup->enforce_changed_dependencies()) {
debugging('Your settings have been altered due to unmet dependencies', DEBUG_DEVELOPER);
}
$loghtml = '';
if ($backup->get_stage() == backup_ui::STAGE_FINAL) {
// Before we perform the backup check settings to see if user
// or setting defaults are set to exclude files from the backup.
if ($backup->get_setting_value('files') == 0) {
$renderer->set_samesite_notification();
}
if ($backupmode != backup::MODE_ASYNC) {
// Synchronous backup handling.
// Display an extra backup step bar so that we can show the 'processing' step first.
echo html_writer::start_div('', array('id' => 'executionprogress'));
echo $renderer->progress_bar($backup->get_progress_bar());
$backup->get_controller()->set_progress(new \core\progress\display());
// Prepare logger and add to end of chain.
$logger = new core_backup_html_logger($CFG->debugdeveloper ? backup::LOG_DEBUG : backup::LOG_INFO);
$backup->get_controller()->add_logger($logger);
// Carry out actual backup.
$backup->execute();
// Backup controller gets saved/loaded so the logger object changes and we
// have to retrieve it.
$logger = $backup->get_controller()->get_logger();
while (!is_a($logger, 'core_backup_html_logger')) {
$logger = $logger->get_next();
}
// Get HTML from logger.
if ($CFG->debugdisplay) {
$loghtml = $logger->get_html();
}
// Hide the progress display and first backup step bar (the 'finished' step will show next).
echo html_writer::end_div();
echo html_writer::script('document.getElementById("executionprogress").style.display = "none";');
} else {
// Async backup handling.
$backup->get_controller()->finish_ui();
echo html_writer::start_div('', array('id' => 'executionprogress'));
echo $renderer->progress_bar($backup->get_progress_bar());
echo html_writer::end_div();
// Create adhoc task for backup.
$asynctask = new \core\task\asynchronous_backup_task();
$asynctask->set_blocking(false);
$asynctask->set_custom_data(array('backupid' => $backupid));
\core\task\manager::queue_adhoc_task($asynctask);
// Add ajax progress bar and initiate ajax via a template.
$restoreurl = new moodle_url('/backup/restorefile.php', array('contextid' => $contextid));
$progresssetup = array(
'backupid' => $backupid,
'contextid' => $contextid,
'courseurl' => $courseurl->out(),
'restoreurl' => $restoreurl->out(),
'headingident' => 'backup'
);
echo $renderer->render_from_template('core/async_backup_status', $progresssetup);
}
} else {
$backup->save_controller();
}
if ($backup->get_stage() != backup_ui::STAGE_FINAL) {
// Displaying UI can require progress reporting, so do it here before outputting
// the backup stage bar (as part of the existing progress bar, if required).
$ui = $backup->display($renderer);
if ($twobars) {
$slowprogress->end_progress();
}
echo $renderer->progress_bar($backup->get_progress_bar());
echo $ui;
// Display log data if there was any.
if ($loghtml != '' && $backupmode != backup::MODE_ASYNC) {
echo $renderer->log_display($loghtml);
}
}
$backup->destroy();
unset($backup);
} else { // User has a pending async operation.
echo $OUTPUT->notification(get_string('pendingasyncerror', 'backup'), 'error');
echo $OUTPUT->container(get_string('pendingasyncdetail', 'backup'));
echo $OUTPUT->continue_button($courseurl);
}
echo $OUTPUT->footer();