/**
  * Function responsible for executing the tasks of any plan
  */
 public function execute()
 {
     if ($this->controller->get_status() != backup::STATUS_AWAITING) {
         throw new restore_controller_exception('restore_not_executable_awaiting_required', $this->controller->get_status());
     }
     $this->controller->set_status(backup::STATUS_EXECUTING);
     parent::execute();
     $this->controller->set_status(backup::STATUS_FINISHED_OK);
 }

 /**
  * Function responsible for executing the tasks of any plan
  */
 public function execute()
 {
     if ($this->controller->get_status() != backup::STATUS_AWAITING) {
         throw new restore_controller_exception('restore_not_executable_awaiting_required', $this->controller->get_status());
     }
     $this->controller->set_status(backup::STATUS_EXECUTING);
     parent::execute();
     $this->controller->set_status(backup::STATUS_FINISHED_OK);
     events_trigger('course_restored', (object) array('courseid' => $this->get_courseid(), 'userid' => $this->get_userid(), 'type' => $this->controller->get_type(), 'target' => $this->controller->get_target(), 'mode' => $this->controller->get_mode(), 'operation' => $this->controller->get_operation(), 'samesite' => $this->controller->is_samesite()));
 }

 /**
  * Function responsible for executing the tasks of any plan
  */
 public function execute()
 {
     if ($this->controller->get_status() != backup::STATUS_AWAITING) {
         throw new restore_controller_exception('restore_not_executable_awaiting_required', $this->controller->get_status());
     }
     $this->controller->set_status(backup::STATUS_EXECUTING);
     parent::execute();
     $this->controller->set_status(backup::STATUS_FINISHED_OK);
     // Trigger a course restored event.
     $event = \core\event\course_restored::create(array('objectid' => $this->get_courseid(), 'userid' => $this->get_userid(), 'context' => context_course::instance($this->get_courseid()), 'other' => array('type' => $this->controller->get_type(), 'target' => $this->controller->get_target(), 'mode' => $this->controller->get_mode(), 'operation' => $this->controller->get_operation(), 'samesite' => $this->controller->is_samesite())));
     $event->trigger();
 }

 /**
  * Function responsible for executing the tasks of any plan
  */
 public function execute()
 {
     if ($this->controller->get_status() != backup::STATUS_AWAITING) {
         throw new restore_controller_exception('restore_not_executable_awaiting_required', $this->controller->get_status());
     }
     $this->controller->set_status(backup::STATUS_EXECUTING);
     parent::execute();
     $this->controller->set_status(backup::STATUS_FINISHED_OK);
     // Check if we are restoring a course.
     if ($this->controller->get_type() === backup::TYPE_1COURSE) {
         // Check to see if we are on the same site to pass original course info.
         $issamesite = $this->controller->is_samesite();
         $otherarray = array('type' => $this->controller->get_type(), 'target' => $this->controller->get_target(), 'mode' => $this->controller->get_mode(), 'operation' => $this->controller->get_operation(), 'samesite' => $issamesite);
         if ($this->controller->is_samesite()) {
             $otherarray['originalcourseid'] = $this->controller->get_info()->original_course_id;
         }
         // Trigger a course restored event.
         $event = \core\event\course_restored::create(array('objectid' => $this->get_courseid(), 'userid' => $this->get_userid(), 'context' => context_course::instance($this->get_courseid()), 'other' => $otherarray));
         $event->trigger();
     }
 }

 /**
  * Entry point for all the prechecks to be performed before restore
  *
  * Returns empty array or warnings/errors array
  */
 public static function execute_prechecks(restore_controller $controller, $droptemptablesafter = false)
 {
     global $CFG;
     $errors = array();
     $warnings = array();
     // Some handy vars to be used along the prechecks
     $samesite = $controller->is_samesite();
     $restoreusers = $controller->get_plan()->get_setting('users')->get_value();
     $hasmnetusers = (int) $controller->get_info()->mnet_remoteusers;
     $restoreid = $controller->get_restoreid();
     $courseid = $controller->get_courseid();
     $userid = $controller->get_userid();
     $rolemappings = $controller->get_info()->role_mappings;
     $progress = $controller->get_progress();
     // Start tracking progress. There are currently 8 major steps, corresponding
     // to $majorstep++ lines in this code; we keep track of the total so as to
     // verify that it's still correct. If you add a major step, you need to change
     // the total here.
     $majorstep = 1;
     $majorsteps = 8;
     $progress->start_progress('Carrying out pre-restore checks', $majorsteps);
     // Load all the included tasks to look for inforef.xml files
     $inforeffiles = array();
     $tasks = restore_dbops::get_included_tasks($restoreid);
     $progress->start_progress('Listing inforef files', count($tasks));
     $minorstep = 1;
     foreach ($tasks as $task) {
         // Add the inforef.xml file if exists
         $inforefpath = $task->get_taskbasepath() . '/inforef.xml';
         if (file_exists($inforefpath)) {
             $inforeffiles[] = $inforefpath;
         }
         $progress->progress($minorstep++);
     }
     $progress->end_progress();
     $progress->progress($majorstep++);
     // Create temp tables
     restore_controller_dbops::create_restore_temp_tables($controller->get_restoreid());
     // Check we are restoring one backup >= $min20version (very first ok ever)
     $min20version = 2010072300;
     if ($controller->get_info()->backup_version < $min20version) {
         $message = new stdclass();
         $message->backup = $controller->get_info()->backup_version;
         $message->min = $min20version;
         $errors[] = get_string('errorminbackup20version', 'backup', $message);
     }
     // Compare Moodle's versions
     if ($CFG->version < $controller->get_info()->moodle_version) {
         $message = new stdclass();
         $message->serverversion = $CFG->version;
         $message->serverrelease = $CFG->release;
         $message->backupversion = $controller->get_info()->moodle_version;
         $message->backuprelease = $controller->get_info()->moodle_release;
         $warnings[] = get_string('noticenewerbackup', '', $message);
     }
     // Error if restoring over frontpage
     // TODO: Review the whole restore process in order to transform this into one warning (see 1.9)
     if ($controller->get_courseid() == SITEID) {
         $errors[] = get_string('errorrestorefrontpage', 'backup');
     }
     // If restoring to different site and restoring users and backup has mnet users warn/error
     if (!$samesite && $restoreusers && $hasmnetusers) {
         // User is admin (can create users at sysctx), warn
         if (has_capability('moodle/user:create', context_system::instance(), $controller->get_userid())) {
             $warnings[] = get_string('mnetrestore_extusers_admin', 'admin');
             // User not admin
         } else {
             $errors[] = get_string('mnetrestore_extusers_noadmin', 'admin');
         }
     }
     // Load all the inforef files, we are going to need them
     $progress->start_progress('Loading temporary IDs', count($inforeffiles));
     $minorstep = 1;
     foreach ($inforeffiles as $inforeffile) {
         // Load each inforef file to temp_ids.
         restore_dbops::load_inforef_to_tempids($restoreid, $inforeffile, $progress);
         $progress->progress($minorstep++);
     }
     $progress->end_progress();
     $progress->progress($majorstep++);
     // If restoring users, check we are able to create all them
     if ($restoreusers) {
         $file = $controller->get_plan()->get_basepath() . '/users.xml';
         // Load needed users to temp_ids.
         restore_dbops::load_users_to_tempids($restoreid, $file, $progress);
         $progress->progress($majorstep++);
         if ($problems = restore_dbops::precheck_included_users($restoreid, $courseid, $userid, $samesite, $progress)) {
             $errors = array_merge($errors, $problems);
         }
     } else {
         // To ensure consistent number of steps in progress tracking,
         // mark progress even though we didn't do anything.
         $progress->progress($majorstep++);
     }
     $progress->progress($majorstep++);
//.........这里部分代码省略.........

 /**
  * Duplicates a single activity within a course.
  *
  * This is based on the code from course/modduplicate.php, but reduced for
  * simplicity.
  *
  * @param stdClass $course Course object
  * @param int $cmid Activity to duplicate
  * @return int ID of new activity
  */
 protected function duplicate($course, $cmid)
 {
     global $USER;
     // Do backup.
     $bc = new backup_controller(backup::TYPE_1ACTIVITY, $cmid, backup::FORMAT_MOODLE, backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id);
     $backupid = $bc->get_backupid();
     $bc->execute_plan();
     $bc->destroy();
     // Do restore.
     $rc = new restore_controller($backupid, $course->id, backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id, backup::TARGET_CURRENT_ADDING);
     $this->assertTrue($rc->execute_precheck());
     $rc->execute_plan();
     // Find cmid.
     $tasks = $rc->get_plan()->get_tasks();
     $cmcontext = context_module::instance($cmid);
     $newcmid = 0;
     foreach ($tasks as $task) {
         if (is_subclass_of($task, 'restore_activity_task')) {
             if ($task->get_old_contextid() == $cmcontext->id) {
                 $newcmid = $task->get_moduleid();
                 break;
             }
         }
     }
     $rc->destroy();
     if (!$newcmid) {
         throw new coding_exception('Unexpected: failure to find restored cmid');
     }
     return $newcmid;
 }

 /**
  * Used to notify the completion system (if necessary) that a user's grade
  * has changed, and clear up a possible score cache.
  *
  * @param bool $deleted True if grade was actually deleted
  */
 protected function notify_changed($deleted)
 {
     global $CFG;
     // Condition code may cache the grades for conditional availability of
     // modules or sections. (This code should use a hook for communication
     // with plugin, but hooks are not implemented at time of writing.)
     if (!empty($CFG->enableavailability) && class_exists('\\availability_grade\\callbacks')) {
         \availability_grade\callbacks::grade_changed($this->userid);
     }
     require_once $CFG->libdir . '/completionlib.php';
     // Bail out immediately if completion is not enabled for site (saves loading
     // grade item & requiring the restore stuff).
     if (!completion_info::is_enabled_for_site()) {
         return;
     }
     // Ignore during restore, as completion data will be updated anyway and
     // doing it now will result in incorrect dates (it will say they got the
     // grade completion now, instead of the correct time).
     if (class_exists('restore_controller', false) && restore_controller::is_executing()) {
         return;
     }
     // Load information about grade item
     $this->load_grade_item();
     // Only course-modules have completion data
     if ($this->grade_item->itemtype != 'mod') {
         return;
     }
     // Use $COURSE if available otherwise get it via item fields
     $course = get_course($this->grade_item->courseid, false);
     // Bail out if completion is not enabled for course
     $completion = new completion_info($course);
     if (!$completion->is_enabled()) {
         return;
     }
     // Get course-module
     $cm = get_coursemodule_from_instance($this->grade_item->itemmodule, $this->grade_item->iteminstance, $this->grade_item->courseid);
     // If the course-module doesn't exist, display a warning...
     if (!$cm) {
         // ...unless the grade is being deleted in which case it's likely
         // that the course-module was just deleted too, so that's okay.
         if (!$deleted) {
             debugging("Couldn't find course-module for module '" . $this->grade_item->itemmodule . "', instance '" . $this->grade_item->iteminstance . "', course '" . $this->grade_item->courseid . "'");
         }
         return;
     }
     // Pass information on to completion system
     $completion->inform_grade_changed($cm, $this->grade_item, $this, $deleted);
 }

 /**
  * Backs a course up and restores it.
  *
  * @param stdClass $srccourse Course object to backup
  * @param stdClass $dstcourse Course object to restore into
  * @return int ID of newly restored course
  */
 protected function backup_and_restore($srccourse, $dstcourse = null)
 {
     global $USER, $CFG;
     // Turn off file logging, otherwise it can't delete the file (Windows).
     $CFG->backup_file_logger_level = backup::LOG_NONE;
     // Do backup with default settings. MODE_IMPORT means it will just
     // create the directory and not zip it.
     $bc = new backup_controller(backup::TYPE_1COURSE, $srccourse->id, backup::FORMAT_MOODLE, backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id);
     $backupid = $bc->get_backupid();
     $bc->execute_plan();
     $bc->destroy();
     // Do restore to new course with default settings.
     if ($dstcourse !== null) {
         $newcourseid = $dstcourse->id;
     } else {
         $newcourseid = restore_dbops::create_new_course($srccourse->fullname, $srccourse->shortname . '_2', $srccourse->category);
     }
     $rc = new restore_controller($backupid, $newcourseid, backup::INTERACTIVE_NO, backup::MODE_GENERAL, $USER->id, backup::TARGET_NEW_COURSE);
     $this->assertTrue($rc->execute_precheck());
     $rc->execute_plan();
     $rc->destroy();
     return $newcourseid;
 }

//.........这里部分代码省略.........
        $importtocontext = context_course::instance($importto->id);
        self::validate_context($importtocontext);

        $backupdefaults = array(
            'activities' => 1,
            'blocks' => 1,
            'filters' => 1
        );

        $backupsettings = array();

        // Check for backup and restore options.
        if (!empty($params['options'])) {
            foreach ($params['options'] as $option) {

                // Strict check for a correct value (allways 1 or 0, true or false).
                $value = clean_param($option['value'], PARAM_INT);

                if ($value !== 0 and $value !== 1) {
                    throw new moodle_exception('invalidextparam', 'webservice', '', $option['name']);
                }

                if (!isset($backupdefaults[$option['name']])) {
                    throw new moodle_exception('invalidextparam', 'webservice', '', $option['name']);
                }

                $backupsettings[$option['name']] = $value;
            }
        }

        // Capability checking.

        require_capability('moodle/backup:backuptargetimport', $importfromcontext);
        require_capability('moodle/restore:restoretargetimport', $importtocontext);

        $bc = new backup_controller(backup::TYPE_1COURSE, $importfrom->id, backup::FORMAT_MOODLE,
                backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id);

        foreach ($backupsettings as $name => $value) {
            $bc->get_plan()->get_setting($name)->set_value($value);
        }

        $backupid       = $bc->get_backupid();
        $backupbasepath = $bc->get_plan()->get_basepath();

        $bc->execute_plan();
        $bc->destroy();

        // Restore the backup immediately.

        // Check if we must delete the contents of the destination course.
        if ($params['deletecontent']) {
            $restoretarget = backup::TARGET_EXISTING_DELETING;
        } else {
            $restoretarget = backup::TARGET_EXISTING_ADDING;
        }

        $rc = new restore_controller($backupid, $importto->id,
                backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id, $restoretarget);

        foreach ($backupsettings as $name => $value) {
            $rc->get_plan()->get_setting($name)->set_value($value);
        }

        if (!$rc->execute_precheck()) {
            $precheckresults = $rc->get_precheck_results();
            if (is_array($precheckresults) && !empty($precheckresults['errors'])) {
                if (empty($CFG->keeptempdirectoriesonbackup)) {
                    fulldelete($backupbasepath);
                }

                $errorinfo = '';

                foreach ($precheckresults['errors'] as $error) {
                    $errorinfo .= $error;
                }

                if (array_key_exists('warnings', $precheckresults)) {
                    foreach ($precheckresults['warnings'] as $warning) {
                        $errorinfo .= $warning;
                    }
                }

                throw new moodle_exception('backupprecheckerrors', 'webservice', '', $errorinfo);
            }
        } else {
            if ($restoretarget == backup::TARGET_EXISTING_DELETING) {
                restore_dbops::delete_course_content($importto->id);
            }
        }

        $rc->execute_plan();
        $rc->destroy();

        if (empty($CFG->keeptempdirectoriesonbackup)) {
            fulldelete($backupbasepath);
        }

        return null;
    }

 /**
  * Takes backupid and original course object as arguments and returns a new courseid.
  *
  * @param string $backupid The backupid
  * @param object $newcourse Target course object
  * @throws coding_exception Moodle coding exception
  */
 private function restore($backupid, $newcourse)
 {
     global $CFG, $DB, $USER;
     // Call restore.
     $rc = new \restore_controller($backupid, $newcourse->id, \backup::INTERACTIVE_NO, \backup::MODE_GENERAL, $USER->id, \backup::TARGET_EXISTING_ADDING);
     // Setup custom logger that prints dots.
     $logger = new logger(\backup::LOG_INFO, false, true);
     self::$currentlogger = $logger;
     $logger->potential_dot();
     $rc->get_logger()->set_next($logger);
     $rc->set_progress(new progress());
     foreach ($rc->get_plan()->get_tasks() as $taskindex => $task) {
         $settings = $task->get_settings();
         foreach ($settings as $settingindex => $setting) {
             // Set userinfo true for activity, since we controlled it
             // more accurately (i.e. true only for glossary) in backup.
             if (preg_match('/^glossary_([0-9])*_userinfo$$/', $setting->get_name())) {
                 $setting->set_value(true);
             }
             if ($taskindex == 0 && isset($this->backupsettings[$setting->get_name()])) {
                 $setting->set_value($this->backupsettings[$setting->get_name()]);
             }
         }
     }
     if (!$rc->execute_precheck()) {
         if (empty($CFG->keeptempdirectoriesonbackup)) {
             fulldelete($this->backupbasepath);
         }
         $results = print_r($rc->get_precheck_results(), true);
         print \html_writer::tag('pre', s($results));
         throw new \coding_exception('Restore precheck error.');
     }
     $logger->potential_dot();
     $rc->execute_plan();
     $rc->destroy();
     // Delete backup file.
     if (empty($CFG->keeptempdirectoriesonbackup)) {
         fulldelete($this->backupbasepath);
     }
 }

/**
 * Duplicate a module on the course.
 *
 * @param object $course The course
 * @param object $cm The course module to duplicate
 * @throws moodle_exception if the plugin doesn't support duplication
 * @return Object containing:
 * - fullcontent: The HTML markup for the created CM
 * - cmid: The CMID of the newly created CM
 * - redirect: Whether to trigger a redirect following this change
 */
function mod_duplicate_activity($course, $cm, $sr = null)
{
    global $CFG, $USER, $PAGE, $DB;
    require_once $CFG->dirroot . '/backup/util/includes/backup_includes.php';
    require_once $CFG->dirroot . '/backup/util/includes/restore_includes.php';
    require_once $CFG->libdir . '/filelib.php';
    $a = new stdClass();
    $a->modtype = get_string('modulename', $cm->modname);
    $a->modname = format_string($cm->name);
    if (!plugin_supports('mod', $cm->modname, FEATURE_BACKUP_MOODLE2)) {
        throw new moodle_exception('duplicatenosupport', 'error');
    }
    // backup the activity
    $bc = new backup_controller(backup::TYPE_1ACTIVITY, $cm->id, backup::FORMAT_MOODLE, backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id);
    $backupid = $bc->get_backupid();
    $backupbasepath = $bc->get_plan()->get_basepath();
    $bc->execute_plan();
    $bc->destroy();
    // restore the backup immediately
    $rc = new restore_controller($backupid, $course->id, backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id, backup::TARGET_CURRENT_ADDING);
    $cmcontext = context_module::instance($cm->id);
    if (!$rc->execute_precheck()) {
        $precheckresults = $rc->get_precheck_results();
        if (is_array($precheckresults) && !empty($precheckresults['errors'])) {
            if (empty($CFG->keeptempdirectoriesonbackup)) {
                fulldelete($backupbasepath);
            }
        }
    }
    $rc->execute_plan();
    // now a bit hacky part follows - we try to get the cmid of the newly
    // restored copy of the module
    $newcmid = null;
    $tasks = $rc->get_plan()->get_tasks();
    foreach ($tasks as $task) {
        error_log("Looking at a task");
        if (is_subclass_of($task, 'restore_activity_task')) {
            error_log("Looking at a restore_activity_task task");
            if ($task->get_old_contextid() == $cmcontext->id) {
                error_log("Contexts match");
                $newcmid = $task->get_moduleid();
                break;
            }
        }
    }
    // if we know the cmid of the new course module, let us move it
    // right below the original one. otherwise it will stay at the
    // end of the section
    if ($newcmid) {
        $info = get_fast_modinfo($course);
        $newcm = $info->get_cm($newcmid);
        $section = $DB->get_record('course_sections', array('id' => $cm->section, 'course' => $cm->course));
        moveto_module($newcm, $section, $cm);
        moveto_module($cm, $section, $newcm);
        // Trigger course module created event. We can trigger the event only if we know the newcmid.
        $event = \core\event\course_module_created::create_from_cm($newcm);
        $event->trigger();
    }
    rebuild_course_cache($cm->course);
    $rc->destroy();
    if (empty($CFG->keeptempdirectoriesonbackup)) {
        fulldelete($backupbasepath);
    }
    $resp = new stdClass();
    if ($newcm) {
        $courserenderer = $PAGE->get_renderer('core', 'course');
        $completioninfo = new completion_info($course);
        $modulehtml = $courserenderer->course_section_cm($course, $completioninfo, $newcm, null, array());
        $resp->fullcontent = $courserenderer->course_section_cm_list_item($course, $completioninfo, $newcm, $sr);
        $resp->cmid = $newcm->id;
    } else {
        // Trigger a redirect
        $resp->redirect = true;
    }
    return $resp;
}

/**
 * Api to duplicate a module.
 *
 * @param object $course course object.
 * @param object $cm course module object to be duplicated.
 * @since Moodle 2.8
 *
 * @throws Exception
 * @throws coding_exception
 * @throws moodle_exception
 * @throws restore_controller_exception
 *
 * @return cm_info|null cminfo object if we sucessfully duplicated the mod and found the new cm.
 */
function duplicate_module($course, $cm)
{
    global $CFG, $DB, $USER;
    require_once $CFG->dirroot . '/backup/util/includes/backup_includes.php';
    require_once $CFG->dirroot . '/backup/util/includes/restore_includes.php';
    require_once $CFG->libdir . '/filelib.php';
    $a = new stdClass();
    $a->modtype = get_string('modulename', $cm->modname);
    $a->modname = format_string($cm->name);
    if (!plugin_supports('mod', $cm->modname, FEATURE_BACKUP_MOODLE2)) {
        throw new moodle_exception('duplicatenosupport', 'error', '', $a);
    }
    // Backup the activity.
    $bc = new backup_controller(backup::TYPE_1ACTIVITY, $cm->id, backup::FORMAT_MOODLE, backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id);
    $backupid = $bc->get_backupid();
    $backupbasepath = $bc->get_plan()->get_basepath();
    $bc->execute_plan();
    $bc->destroy();
    // Restore the backup immediately.
    $rc = new restore_controller($backupid, $course->id, backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id, backup::TARGET_CURRENT_ADDING);
    $cmcontext = context_module::instance($cm->id);
    if (!$rc->execute_precheck()) {
        $precheckresults = $rc->get_precheck_results();
        if (is_array($precheckresults) && !empty($precheckresults['errors'])) {
            if (empty($CFG->keeptempdirectoriesonbackup)) {
                fulldelete($backupbasepath);
            }
        }
    }
    $rc->execute_plan();
    // Now a bit hacky part follows - we try to get the cmid of the newly
    // restored copy of the module.
    $newcmid = null;
    $tasks = $rc->get_plan()->get_tasks();
    foreach ($tasks as $task) {
        if (is_subclass_of($task, 'restore_activity_task')) {
            if ($task->get_old_contextid() == $cmcontext->id) {
                $newcmid = $task->get_moduleid();
                break;
            }
        }
    }
    // If we know the cmid of the new course module, let us move it
    // right below the original one. otherwise it will stay at the
    // end of the section.
    if ($newcmid) {
        $info = get_fast_modinfo($course);
        $newcm = $info->get_cm($newcmid);
        $section = $DB->get_record('course_sections', array('id' => $cm->section, 'course' => $cm->course));
        moveto_module($newcm, $section, $cm);
        moveto_module($cm, $section, $newcm);
        // Update calendar events with the duplicated module.
        $refresheventsfunction = $newcm->modname . '_refresh_events';
        if (function_exists($refresheventsfunction)) {
            call_user_func($refresheventsfunction, $newcm->course);
        }
        // Trigger course module created event. We can trigger the event only if we know the newcmid.
        $event = \core\event\course_module_created::create_from_cm($newcm);
        $event->trigger();
    }
    rebuild_course_cache($cm->course);
    $rc->destroy();
    if (empty($CFG->keeptempdirectoriesonbackup)) {
        fulldelete($backupbasepath);
    }
    return isset($newcm) ? $newcm : null;
}

 /**
  * Proceed with the import of the course.
  *
  * @return void
  */
 public function proceed()
 {
     global $CFG, $USER;
     if (!$this->prepared) {
         throw new coding_exception('The course has not been prepared.');
     } else {
         if ($this->has_errors()) {
             throw new moodle_exception('Cannot proceed, errors were detected.');
         } else {
             if ($this->processstarted) {
                 throw new coding_exception('The process has already been started.');
             }
         }
     }
     $this->processstarted = true;
     if ($this->do === self::DO_DELETE) {
         if ($this->delete()) {
             $this->status('coursedeleted', new lang_string('coursedeleted', 'tool_uploadcourse'));
         } else {
             $this->error('errorwhiledeletingcourse', new lang_string('errorwhiledeletingcourse', 'tool_uploadcourse'));
         }
         return true;
     } else {
         if ($this->do === self::DO_CREATE) {
             $course = create_course((object) $this->data);
             $this->id = $course->id;
             $this->status('coursecreated', new lang_string('coursecreated', 'tool_uploadcourse'));
         } else {
             if ($this->do === self::DO_UPDATE) {
                 $course = (object) $this->data;
                 update_course($course);
                 $this->id = $course->id;
                 $this->status('courseupdated', new lang_string('courseupdated', 'tool_uploadcourse'));
             } else {
                 // Strangely the outcome has not been defined, or is unknown!
                 throw new coding_exception('Unknown outcome!');
             }
         }
     }
     // Restore a course.
     if (!empty($this->restoredata)) {
         $rc = new restore_controller($this->restoredata, $course->id, backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id, backup::TARGET_CURRENT_ADDING);
         // Check if the format conversion must happen first.
         if ($rc->get_status() == backup::STATUS_REQUIRE_CONV) {
             $rc->convert();
         }
         if ($rc->execute_precheck()) {
             $rc->execute_plan();
             $this->status('courserestored', new lang_string('courserestored', 'tool_uploadcourse'));
         } else {
             $this->error('errorwhilerestoringcourse', new lang_string('errorwhilerestoringthecourse', 'tool_uploadcourse'));
         }
         $rc->destroy();
     }
     // Proceed with enrolment data.
     $this->process_enrolment_data($course);
     // Reset the course.
     if ($this->importoptions['reset'] || $this->options['reset']) {
         if ($this->do === self::DO_UPDATE && $this->can_reset()) {
             $this->reset($course);
             $this->status('coursereset', new lang_string('coursereset', 'tool_uploadcourse'));
         }
     }
     // Mark context as dirty.
     $context = context_course::instance($course->id);
     $context->mark_dirty();
 }

        $restore_url = new moodle_url('/backup/restore.php', array('contextid' => $contextid, 'filename' => $filename));
        redirect($restore_url);
    } else {
        redirect($url, get_string('filenotfound', 'error'));
    }
    die;
}
$PAGE->set_url($url);
$PAGE->set_context($context);
$PAGE->set_title(get_string('course') . ': ' . $course->fullname);
$PAGE->set_heading($heading);
$PAGE->set_pagelayout('admin');
$form = new course_restore_form(null, array('contextid' => $contextid));
$data = $form->get_data();
if ($data && has_capability('moodle/restore:uploadfile', $context)) {
    $filename = restore_controller::get_tempdir_name($course->id, $USER->id);
    $pathname = $tmpdir . '/' . $filename;
    $form->save_file('backupfile', $pathname);
    $restore_url = new moodle_url('/backup/restore.php', array('contextid' => $contextid, 'filename' => $filename));
    redirect($restore_url);
    die;
}
echo $OUTPUT->header();
// require uploadfile cap to use file picker
if (has_capability('moodle/restore:uploadfile', $context)) {
    echo $OUTPUT->heading(get_string('importfile', 'backup'));
    echo $OUTPUT->container_start();
    $form->display();
    echo $OUTPUT->container_end();
}
if ($context->contextlevel == CONTEXT_MODULE) {

/**
 * Duplicates a Moodle module in an existing course
 * @param  int $cmid     Course module id
 * @param  int $courseid Course id
 * @return int           New course module id
 */
function local_ltiprovider_duplicate_module($cmid, $courseid, $newidnumber, $lticontext)
{
    global $CFG, $DB, $USER;
    require_once $CFG->dirroot . '/backup/util/includes/backup_includes.php';
    require_once $CFG->dirroot . '/backup/util/includes/restore_includes.php';
    require_once $CFG->libdir . '/filelib.php';
    if (empty($USER)) {
        // Emulate session.
        cron_setup_user();
    }
    $course = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
    $cm = get_coursemodule_from_id('', $cmid, 0, true, MUST_EXIST);
    $cmcontext = context_module::instance($cm->id);
    $context = context_course::instance($course->id);
    if (!plugin_supports('mod', $cm->modname, FEATURE_BACKUP_MOODLE2)) {
        $url = course_get_url($course, $cm->sectionnum, array('sr' => $sectionreturn));
        print_error('duplicatenosupport', 'error', $url, $a);
    }
    // backup the activity
    $admin = get_admin();
    $bc = new backup_controller(backup::TYPE_1ACTIVITY, $cm->id, backup::FORMAT_MOODLE, backup::INTERACTIVE_NO, backup::MODE_IMPORT, $admin->id);
    $backupid = $bc->get_backupid();
    $backupbasepath = $bc->get_plan()->get_basepath();
    $bc->execute_plan();
    $bc->destroy();
    // restore the backup immediately
    $rc = new restore_controller($backupid, $courseid, backup::INTERACTIVE_NO, backup::MODE_IMPORT, $admin->id, backup::TARGET_CURRENT_ADDING);
    if (!$rc->execute_precheck()) {
        $precheckresults = $rc->get_precheck_results();
        if (is_array($precheckresults) && !empty($precheckresults['errors'])) {
            if (empty($CFG->keeptempdirectoriesonbackup)) {
                fulldelete($backupbasepath);
            }
            print_r($precheckresults);
            die;
        }
    }
    $rc->execute_plan();
    $newcmid = null;
    $tasks = $rc->get_plan()->get_tasks();
    foreach ($tasks as $task) {
        if (is_subclass_of($task, 'restore_activity_task')) {
            if ($task->get_old_contextid() == $cmcontext->id) {
                $newcmid = $task->get_moduleid();
                break;
            }
        }
    }
    $rc->destroy();
    if ($module = $DB->get_record('course_modules', array('id' => $newcmid))) {
        $module->idnumber = $newidnumber;
        $DB->update_record('course_modules', $module);
    }
    $newtoolid = 0;
    if ($tools = $DB->get_records('local_ltiprovider', array('contextid' => $cmcontext->id))) {
        $newcmcontext = context_module::instance($newcmid);
        foreach ($tools as $tool) {
            $tool->courseid = $course->id;
            $tool->contextid = $newcmcontext->id;
            $newtoolid = $DB->insert_record('local_ltiprovider', $tool);
        }
    }
    if (!$newtoolid) {
        $tool = local_ltiprovider_create_tool($course->id, $newcmcontext->id, $lticontext);
    }
    if (empty($CFG->keeptempdirectoriesonbackup)) {
        fulldelete($backupbasepath);
    }
    return $newcmid;
}

 /**
  *
  */
 public function apply_preset($userpreset, $torestorer = true)
 {
     global $DB, $CFG, $USER;
     $df = mod_dataform_dataform::instance($this->_dataformid);
     // Extract the backup file to the temp folder.
     $folder = 'tmp-' . $df->context->id . '-' . time();
     $backuptempdir = make_temp_directory("backup/{$folder}");
     $fs = get_file_storage();
     $file = $fs->get_file_by_id($userpreset);
     $zipper = get_file_packer($file->get_mimetype());
     $file->extract_to_pathname($zipper, $backuptempdir);
     require_once "{$CFG->dirroot}/backup/util/includes/restore_includes.php";
     // Required preparation due to restorer assumption that this should be a new activity
     // Anonymous users cleanup.
     $DB->delete_records_select('user', $DB->sql_like('firstname', '?'), array('%anonfirstname%'));
     // Grading area removal.
     $DB->delete_records('grading_areas', array('contextid' => $df->context->id));
     $transaction = $DB->start_delegated_transaction();
     $rc = new restore_controller($folder, $df->course->id, backup::INTERACTIVE_NO, backup::MODE_GENERAL, $USER->id, backup::TARGET_CURRENT_ADDING);
     if (!$rc->execute_precheck()) {
         $precheckresults = $rc->get_precheck_results();
         if (is_array($precheckresults) && !empty($precheckresults['errors'])) {
             if (empty($CFG->keeptempdirectoriesonbackup)) {
                 fulldelete($backuptempdir);
             }
         }
     }
     // Get the dataform restore activity task.
     $tasks = $rc->get_plan()->get_tasks();
     $dataformtask = null;
     foreach ($tasks as &$task) {
         if ($task instanceof restore_dataform_activity_task) {
             $dataformtask =& $task;
             break;
         }
     }
     if ($dataformtask) {
         $dataformtask->set_activityid($df->id);
         $dataformtask->set_moduleid($df->cm->id);
         $dataformtask->set_contextid($df->context->id);
         if ($torestorer) {
             $dataformtask->set_ownerid($USER->id);
         }
         $rc->set_status(backup::STATUS_AWAITING);
         $rc->execute_plan();
         $transaction->allow_commit();
         // Rc cleanup.
         $rc->destroy();
         // Anonymous users cleanup.
         $DB->delete_records_select('user', $DB->sql_like('firstname', '?'), array('%anonfirstname%'));
         return true;
     } else {
         $rc->destroy();
     }
     return false;
 }

list($context, $course, $cm) = get_context_info_array($contextid);
navigation_node::override_active_url(new moodle_url('/backup/restorefile.php', array('contextid' => $contextid)));
$PAGE->set_url(new moodle_url('/backup/restore.php', array('contextid' => $contextid)));
$PAGE->set_context($context);
$PAGE->set_pagelayout('standard');
require_login($course, null, $cm);
require_capability('moodle/restore:restorecourse', $context);
if ($stage & restore_ui::STAGE_CONFIRM + restore_ui::STAGE_DESTINATION) {
    $restore = restore_ui::engage_independent_stage($stage, $contextid);
} else {
    $restoreid = optional_param('restore', false, PARAM_ALPHANUM);
    $rc = restore_ui::load_controller($restoreid);
    if (!$rc) {
        $restore = restore_ui::engage_independent_stage($stage / 2, $contextid);
        if ($restore->process()) {
            $rc = new restore_controller($restore->get_filepath(), $restore->get_course_id(), backup::INTERACTIVE_YES, backup::MODE_GENERAL, $USER->id, $restore->get_target());
        }
    }
    if ($rc) {
        // check if the format conversion must happen first
        if ($rc->get_status() == backup::STATUS_REQUIRE_CONV) {
            $rc->convert();
        }
        $restore = new restore_ui($rc, array('contextid' => $context->id));
    }
}
$outcome = $restore->process();
if (!$restore->is_independent()) {
    if ($restore->get_stage() == restore_ui::STAGE_PROCESS && !$restore->requires_substage()) {
        try {
            $restore->execute();