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restore_stepslib.php
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restore_stepslib.php
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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/>.
/**
* Defines various restore steps that will be used by common tasks in restore
*
* @package core_backup
* @subpackage moodle2
* @category backup
* @copyright 2010 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* delete old directories and conditionally create backup_temp_ids table
*/
class restore_create_and_clean_temp_stuff extends restore_execution_step {
protected function define_execution() {
$exists = restore_controller_dbops::create_restore_temp_tables($this->get_restoreid()); // temp tables conditionally
// If the table already exists, it's because restore_prechecks have been executed in the same
// request (without problems) and it already contains a bunch of preloaded information (users...)
// that we aren't going to execute again
if ($exists) { // Inform plan about preloaded information
$this->task->set_preloaded_information();
}
// Create the old-course-ctxid to new-course-ctxid mapping, we need that available since the beginning
$itemid = $this->task->get_old_contextid();
$newitemid = context_course::instance($this->get_courseid())->id;
restore_dbops::set_backup_ids_record($this->get_restoreid(), 'context', $itemid, $newitemid);
// Create the old-system-ctxid to new-system-ctxid mapping, we need that available since the beginning
$itemid = $this->task->get_old_system_contextid();
$newitemid = context_system::instance()->id;
restore_dbops::set_backup_ids_record($this->get_restoreid(), 'context', $itemid, $newitemid);
// Create the old-course-id to new-course-id mapping, we need that available since the beginning
$itemid = $this->task->get_old_courseid();
$newitemid = $this->get_courseid();
restore_dbops::set_backup_ids_record($this->get_restoreid(), 'course', $itemid, $newitemid);
}
}
/**
* delete the temp dir used by backup/restore (conditionally),
* delete old directories and drop temp ids table
*/
class restore_drop_and_clean_temp_stuff extends restore_execution_step {
protected function define_execution() {
global $CFG;
restore_controller_dbops::drop_restore_temp_tables($this->get_restoreid()); // Drop ids temp table
$progress = $this->task->get_progress();
$progress->start_progress('Deleting backup dir');
backup_helper::delete_old_backup_dirs(strtotime('-1 week'), $progress); // Delete > 1 week old temp dirs.
if (empty($CFG->keeptempdirectoriesonbackup)) { // Conditionally
backup_helper::delete_backup_dir($this->task->get_tempdir(), $progress); // Empty restore dir
}
$progress->end_progress();
}
}
/**
* Restore calculated grade items, grade categories etc
*/
class restore_gradebook_structure_step extends restore_structure_step {
/**
* To conditionally decide if this step must be executed
* Note the "settings" conditions are evaluated in the
* corresponding task. Here we check for other conditions
* not being restore settings (files, site settings...)
*/
protected function execute_condition() {
global $CFG, $DB;
if ($this->get_courseid() == SITEID) {
return false;
}
// No gradebook info found, don't execute
$fullpath = $this->task->get_taskbasepath();
$fullpath = rtrim($fullpath, '/') . '/' . $this->filename;
if (!file_exists($fullpath)) {
return false;
}
// Some module present in backup file isn't available to restore
// in this site, don't execute
if ($this->task->is_missing_modules()) {
return false;
}
// Some activity has been excluded to be restored, don't execute
if ($this->task->is_excluding_activities()) {
return false;
}
// There should only be one grade category (the 1 associated with the course itself)
// If other categories already exist we're restoring into an existing course.
// Restoring categories into a course with an existing category structure is unlikely to go well
$category = new stdclass();
$category->courseid = $this->get_courseid();
$catcount = $DB->count_records('grade_categories', (array)$category);
if ($catcount>1) {
return false;
}
// Identify the backup we're dealing with.
$backuprelease = floatval($this->get_task()->get_info()->backup_release); // The major version: 2.9, 3.0, ...
$backupbuild = 0;
preg_match('/(\d{8})/', $this->get_task()->get_info()->moodle_release, $matches);
if (!empty($matches[1])) {
$backupbuild = (int) $matches[1]; // The date of Moodle build at the time of the backup.
}
// On older versions the freeze value has to be converted.
// We do this from here as it is happening right before the file is read.
// This only targets the backup files that can contain the legacy freeze.
if ($backupbuild > 20150618 && ($backuprelease < 3.0 || $backupbuild < 20160527)) {
$this->rewrite_step_backup_file_for_legacy_freeze($fullpath);
}
// Arrived here, execute the step
return true;
}
protected function define_structure() {
$paths = array();
$userinfo = $this->task->get_setting_value('users');
$paths[] = new restore_path_element('attributes', '/gradebook/attributes');
$paths[] = new restore_path_element('grade_category', '/gradebook/grade_categories/grade_category');
$paths[] = new restore_path_element('grade_item', '/gradebook/grade_items/grade_item');
if ($userinfo) {
$paths[] = new restore_path_element('grade_grade', '/gradebook/grade_items/grade_item/grade_grades/grade_grade');
}
$paths[] = new restore_path_element('grade_letter', '/gradebook/grade_letters/grade_letter');
$paths[] = new restore_path_element('grade_setting', '/gradebook/grade_settings/grade_setting');
return $paths;
}
protected function process_attributes($data) {
// For non-merge restore types:
// Unset 'gradebook_calculations_freeze_' in the course and replace with the one from the backup.
$target = $this->get_task()->get_target();
if ($target == backup::TARGET_CURRENT_DELETING || $target == backup::TARGET_EXISTING_DELETING) {
set_config('gradebook_calculations_freeze_' . $this->get_courseid(), null);
}
if (!empty($data['calculations_freeze'])) {
if ($target == backup::TARGET_NEW_COURSE || $target == backup::TARGET_CURRENT_DELETING ||
$target == backup::TARGET_EXISTING_DELETING) {
set_config('gradebook_calculations_freeze_' . $this->get_courseid(), $data['calculations_freeze']);
}
}
}
protected function process_grade_item($data) {
global $DB;
$data = (object)$data;
$oldid = $data->id;
$data->course = $this->get_courseid();
$data->courseid = $this->get_courseid();
if ($data->itemtype=='manual') {
// manual grade items store category id in categoryid
$data->categoryid = $this->get_mappingid('grade_category', $data->categoryid, NULL);
// if mapping failed put in course's grade category
if (NULL == $data->categoryid) {
$coursecat = grade_category::fetch_course_category($this->get_courseid());
$data->categoryid = $coursecat->id;
}
} else if ($data->itemtype=='course') {
// course grade item stores their category id in iteminstance
$coursecat = grade_category::fetch_course_category($this->get_courseid());
$data->iteminstance = $coursecat->id;
} else if ($data->itemtype=='category') {
// category grade items store their category id in iteminstance
$data->iteminstance = $this->get_mappingid('grade_category', $data->iteminstance, NULL);
} else {
throw new restore_step_exception('unexpected_grade_item_type', $data->itemtype);
}
$data->scaleid = $this->get_mappingid('scale', $data->scaleid, NULL);
$data->outcomeid = $this->get_mappingid('outcome', $data->outcomeid, NULL);
$data->locktime = $this->apply_date_offset($data->locktime);
$data->timecreated = $this->apply_date_offset($data->timecreated);
$data->timemodified = $this->apply_date_offset($data->timemodified);
$coursecategory = $newitemid = null;
//course grade item should already exist so updating instead of inserting
if($data->itemtype=='course') {
//get the ID of the already created grade item
$gi = new stdclass();
$gi->courseid = $this->get_courseid();
$gi->itemtype = $data->itemtype;
//need to get the id of the grade_category that was automatically created for the course
$category = new stdclass();
$category->courseid = $this->get_courseid();
$category->parent = null;
//course category fullname starts out as ? but may be edited
//$category->fullname = '?';
$coursecategory = $DB->get_record('grade_categories', (array)$category);
$gi->iteminstance = $coursecategory->id;
$existinggradeitem = $DB->get_record('grade_items', (array)$gi);
if (!empty($existinggradeitem)) {
$data->id = $newitemid = $existinggradeitem->id;
$DB->update_record('grade_items', $data);
}
} else if ($data->itemtype == 'manual') {
// Manual items aren't assigned to a cm, so don't go duplicating them in the target if one exists.
$gi = array(
'itemtype' => $data->itemtype,
'courseid' => $data->courseid,
'itemname' => $data->itemname,
'categoryid' => $data->categoryid,
);
$newitemid = $DB->get_field('grade_items', 'id', $gi);
}
if (empty($newitemid)) {
//in case we found the course category but still need to insert the course grade item
if ($data->itemtype=='course' && !empty($coursecategory)) {
$data->iteminstance = $coursecategory->id;
}
$newitemid = $DB->insert_record('grade_items', $data);
}
$this->set_mapping('grade_item', $oldid, $newitemid);
}
protected function process_grade_grade($data) {
global $DB;
$data = (object)$data;
$oldid = $data->id;
$olduserid = $data->userid;
$data->itemid = $this->get_new_parentid('grade_item');
$data->userid = $this->get_mappingid('user', $data->userid, null);
if (!empty($data->userid)) {
$data->usermodified = $this->get_mappingid('user', $data->usermodified, null);
$data->locktime = $this->apply_date_offset($data->locktime);
// TODO: Ask, all the rest of locktime/exported... work with time... to be rolled?
$data->overridden = $this->apply_date_offset($data->overridden);
$data->timecreated = $this->apply_date_offset($data->timecreated);
$data->timemodified = $this->apply_date_offset($data->timemodified);
$gradeexists = $DB->record_exists('grade_grades', array('userid' => $data->userid, 'itemid' => $data->itemid));
if ($gradeexists) {
$message = "User id '{$data->userid}' already has a grade entry for grade item id '{$data->itemid}'";
$this->log($message, backup::LOG_DEBUG);
} else {
$newitemid = $DB->insert_record('grade_grades', $data);
$this->set_mapping('grade_grades', $oldid, $newitemid);
}
} else {
$message = "Mapped user id not found for user id '{$olduserid}', grade item id '{$data->itemid}'";
$this->log($message, backup::LOG_DEBUG);
}
}
protected function process_grade_category($data) {
global $DB;
$data = (object)$data;
$oldid = $data->id;
$data->course = $this->get_courseid();
$data->courseid = $data->course;
$data->timecreated = $this->apply_date_offset($data->timecreated);
$data->timemodified = $this->apply_date_offset($data->timemodified);
$newitemid = null;
//no parent means a course level grade category. That may have been created when the course was created
if(empty($data->parent)) {
//parent was being saved as 0 when it should be null
$data->parent = null;
//get the already created course level grade category
$category = new stdclass();
$category->courseid = $this->get_courseid();
$category->parent = null;
$coursecategory = $DB->get_record('grade_categories', (array)$category);
if (!empty($coursecategory)) {
$data->id = $newitemid = $coursecategory->id;
$DB->update_record('grade_categories', $data);
}
}
// Add a warning about a removed setting.
if (!empty($data->aggregatesubcats)) {
set_config('show_aggregatesubcats_upgrade_' . $data->courseid, 1);
}
//need to insert a course category
if (empty($newitemid)) {
$newitemid = $DB->insert_record('grade_categories', $data);
}
$this->set_mapping('grade_category', $oldid, $newitemid);
}
protected function process_grade_letter($data) {
global $DB;
$data = (object)$data;
$oldid = $data->id;
$data->contextid = context_course::instance($this->get_courseid())->id;
$gradeletter = (array)$data;
unset($gradeletter['id']);
if (!$DB->record_exists('grade_letters', $gradeletter)) {
$newitemid = $DB->insert_record('grade_letters', $data);
} else {
$newitemid = $data->id;
}
$this->set_mapping('grade_letter', $oldid, $newitemid);
}
protected function process_grade_setting($data) {
global $DB;
$data = (object)$data;
$oldid = $data->id;
$data->courseid = $this->get_courseid();
$target = $this->get_task()->get_target();
if ($data->name == 'minmaxtouse' &&
($target == backup::TARGET_CURRENT_ADDING || $target == backup::TARGET_EXISTING_ADDING)) {
// We never restore minmaxtouse during merge.
return;
}
if (!$DB->record_exists('grade_settings', array('courseid' => $data->courseid, 'name' => $data->name))) {
$newitemid = $DB->insert_record('grade_settings', $data);
} else {
$newitemid = $data->id;
}
if (!empty($oldid)) {
// In rare cases (minmaxtouse), it is possible that there wasn't any ID associated with the setting.
$this->set_mapping('grade_setting', $oldid, $newitemid);
}
}
/**
* put all activity grade items in the correct grade category and mark all for recalculation
*/
protected function after_execute() {
global $DB;
$conditions = array(
'backupid' => $this->get_restoreid(),
'itemname' => 'grade_item'//,
//'itemid' => $itemid
);
$rs = $DB->get_recordset('backup_ids_temp', $conditions);
// We need this for calculation magic later on.
$mappings = array();
if (!empty($rs)) {
foreach($rs as $grade_item_backup) {
// Store the oldid with the new id.
$mappings[$grade_item_backup->itemid] = $grade_item_backup->newitemid;
$updateobj = new stdclass();
$updateobj->id = $grade_item_backup->newitemid;
//if this is an activity grade item that needs to be put back in its correct category
if (!empty($grade_item_backup->parentitemid)) {
$oldcategoryid = $this->get_mappingid('grade_category', $grade_item_backup->parentitemid, null);
if (!is_null($oldcategoryid)) {
$updateobj->categoryid = $oldcategoryid;
$DB->update_record('grade_items', $updateobj);
}
} else {
//mark course and category items as needing to be recalculated
$updateobj->needsupdate=1;
$DB->update_record('grade_items', $updateobj);
}
}
}
$rs->close();
// We need to update the calculations for calculated grade items that may reference old
// grade item ids using ##gi\d+##.
// $mappings can be empty, use 0 if so (won't match ever)
list($sql, $params) = $DB->get_in_or_equal(array_values($mappings), SQL_PARAMS_NAMED, 'param', true, 0);
$sql = "SELECT gi.id, gi.calculation
FROM {grade_items} gi
WHERE gi.id {$sql} AND
calculation IS NOT NULL";
$rs = $DB->get_recordset_sql($sql, $params);
foreach ($rs as $gradeitem) {
// Collect all of the used grade item id references
if (preg_match_all('/##gi(\d+)##/', $gradeitem->calculation, $matches) < 1) {
// This calculation doesn't reference any other grade items... EASY!
continue;
}
// For this next bit we are going to do the replacement of id's in two steps:
// 1. We will replace all old id references with a special mapping reference.
// 2. We will replace all mapping references with id's
// Why do we do this?
// Because there potentially there will be an overlap of ids within the query and we
// we substitute the wrong id.. safest way around this is the two step system
$calculationmap = array();
$mapcount = 0;
foreach ($matches[1] as $match) {
// Check that the old id is known to us, if not it was broken to begin with and will
// continue to be broken.
if (!array_key_exists($match, $mappings)) {
continue;
}
// Our special mapping key
$mapping = '##MAPPING'.$mapcount.'##';
// The old id that exists within the calculation now
$oldid = '##gi'.$match.'##';
// The new id that we want to replace the old one with.
$newid = '##gi'.$mappings[$match].'##';
// Replace in the special mapping key
$gradeitem->calculation = str_replace($oldid, $mapping, $gradeitem->calculation);
// And record the mapping
$calculationmap[$mapping] = $newid;
$mapcount++;
}
// Iterate all special mappings for this calculation and replace in the new id's
foreach ($calculationmap as $mapping => $newid) {
$gradeitem->calculation = str_replace($mapping, $newid, $gradeitem->calculation);
}
// Update the calculation now that its being remapped
$DB->update_record('grade_items', $gradeitem);
}
$rs->close();
// Need to correct the grade category path and parent
$conditions = array(
'courseid' => $this->get_courseid()
);
$rs = $DB->get_recordset('grade_categories', $conditions);
// Get all the parents correct first as grade_category::build_path() loads category parents from the DB
foreach ($rs as $gc) {
if (!empty($gc->parent)) {
$grade_category = new stdClass();
$grade_category->id = $gc->id;
$grade_category->parent = $this->get_mappingid('grade_category', $gc->parent);
$DB->update_record('grade_categories', $grade_category);
}
}
$rs->close();
// Now we can rebuild all the paths
$rs = $DB->get_recordset('grade_categories', $conditions);
foreach ($rs as $gc) {
$grade_category = new stdClass();
$grade_category->id = $gc->id;
$grade_category->path = grade_category::build_path($gc);
$grade_category->depth = substr_count($grade_category->path, '/') - 1;
$DB->update_record('grade_categories', $grade_category);
}
$rs->close();
// Check what to do with the minmaxtouse setting.
$this->check_minmaxtouse();
// Freeze gradebook calculations if needed.
$this->gradebook_calculation_freeze();
// Restore marks items as needing update. Update everything now.
grade_regrade_final_grades($this->get_courseid());
}
/**
* Freeze gradebook calculation if needed.
*
* This is similar to various upgrade scripts that check if the freeze is needed.
*/
protected function gradebook_calculation_freeze() {
global $CFG;
$gradebookcalculationsfreeze = get_config('core', 'gradebook_calculations_freeze_' . $this->get_courseid());
preg_match('/(\d{8})/', $this->get_task()->get_info()->moodle_release, $matches);
$backupbuild = (int)$matches[1];
// The function floatval will return a float even if there is text mixed with the release number.
$backuprelease = floatval($this->get_task()->get_info()->backup_release);
// Extra credits need adjustments only for backups made between 2.8 release (20141110) and the fix release (20150619).
if (!$gradebookcalculationsfreeze && $backupbuild >= 20141110 && $backupbuild < 20150619) {
require_once($CFG->libdir . '/db/upgradelib.php');
upgrade_extra_credit_weightoverride($this->get_courseid());
}
// Calculated grade items need recalculating for backups made between 2.8 release (20141110) and the fix release (20150627).
if (!$gradebookcalculationsfreeze && $backupbuild >= 20141110 && $backupbuild < 20150627) {
require_once($CFG->libdir . '/db/upgradelib.php');
upgrade_calculated_grade_items($this->get_courseid());
}
// Courses from before 3.1 (20160518) may have a letter boundary problem and should be checked for this issue.
// Backups from before and including 2.9 could have a build number that is greater than 20160518 and should
// be checked for this problem.
if (!$gradebookcalculationsfreeze && ($backupbuild < 20160518 || $backuprelease <= 2.9)) {
require_once($CFG->libdir . '/db/upgradelib.php');
upgrade_course_letter_boundary($this->get_courseid());
}
}
/**
* Checks what should happen with the course grade setting minmaxtouse.
*
* This is related to the upgrade step at the time the setting was added.
*
* @see MDL-48618
* @return void
*/
protected function check_minmaxtouse() {
global $CFG, $DB;
require_once($CFG->libdir . '/gradelib.php');
$userinfo = $this->task->get_setting_value('users');
$settingname = 'minmaxtouse';
$courseid = $this->get_courseid();
$minmaxtouse = $DB->get_field('grade_settings', 'value', array('courseid' => $courseid, 'name' => $settingname));
$version28start = 2014111000.00;
$version28last = 2014111006.05;
$version29start = 2015051100.00;
$version29last = 2015060400.02;
$target = $this->get_task()->get_target();
if ($minmaxtouse === false &&
($target != backup::TARGET_CURRENT_ADDING && $target != backup::TARGET_EXISTING_ADDING)) {
// The setting was not found because this setting did not exist at the time the backup was made.
// And we are not restoring as merge, in which case we leave the course as it was.
$version = $this->get_task()->get_info()->moodle_version;
if ($version < $version28start) {
// We need to set it to use grade_item, but only if the site-wide setting is different. No need to notice them.
if ($CFG->grade_minmaxtouse != GRADE_MIN_MAX_FROM_GRADE_ITEM) {
grade_set_setting($courseid, $settingname, GRADE_MIN_MAX_FROM_GRADE_ITEM);
}
} else if (($version >= $version28start && $version < $version28last) ||
($version >= $version29start && $version < $version29last)) {
// They should be using grade_grade when the course has inconsistencies.
$sql = "SELECT gi.id
FROM {grade_items} gi
JOIN {grade_grades} gg
ON gg.itemid = gi.id
WHERE gi.courseid = ?
AND (gi.itemtype != ? AND gi.itemtype != ?)
AND (gg.rawgrademax != gi.grademax OR gg.rawgrademin != gi.grademin)";
// The course can only have inconsistencies when we restore the user info,
// we do not need to act on existing grades that were not restored as part of this backup.
if ($userinfo && $DB->record_exists_sql($sql, array($courseid, 'course', 'category'))) {
// Display the notice as we do during upgrade.
set_config('show_min_max_grades_changed_' . $courseid, 1);
if ($CFG->grade_minmaxtouse != GRADE_MIN_MAX_FROM_GRADE_GRADE) {
// We need set the setting as their site-wise setting is not GRADE_MIN_MAX_FROM_GRADE_GRADE.
// If they are using the site-wide grade_grade setting, we only want to notice them.
grade_set_setting($courseid, $settingname, GRADE_MIN_MAX_FROM_GRADE_GRADE);
}
}
} else {
// This should never happen because from now on minmaxtouse is always saved in backups.
}
}
}
/**
* Rewrite step definition to handle the legacy freeze attribute.
*
* In previous backups the calculations_freeze property was stored as an attribute of the
* top level node <gradebook>. The backup API, however, do not process grandparent nodes.
* It only processes definitive children, and their parent attributes.
*
* We had:
*
* <gradebook calculations_freeze="20160511">
* <grade_categories>
* <grade_category id="10">
* <depth>1</depth>
* ...
* </grade_category>
* </grade_categories>
* ...
* </gradebook>
*
* And this method will convert it to:
*
* <gradebook >
* <attributes>
* <calculations_freeze>20160511</calculations_freeze>
* </attributes>
* <grade_categories>
* <grade_category id="10">
* <depth>1</depth>
* ...
* </grade_category>
* </grade_categories>
* ...
* </gradebook>
*
* Note that we cannot just load the XML file in memory as it could potentially be huge.
* We can also completely ignore if the node <attributes> is already in the backup
* file as it never existed before.
*
* @param string $filepath The absolute path to the XML file.
* @return void
*/
protected function rewrite_step_backup_file_for_legacy_freeze($filepath) {
$foundnode = false;
$newfile = make_request_directory(true) . DIRECTORY_SEPARATOR . 'file.xml';
$fr = fopen($filepath, 'r');
$fw = fopen($newfile, 'w');
if ($fr && $fw) {
while (($line = fgets($fr, 4096)) !== false) {
if (!$foundnode && strpos($line, '<gradebook ') === 0) {
$foundnode = true;
$matches = array();
$pattern = '@calculations_freeze=.([0-9]+).@';
if (preg_match($pattern, $line, $matches)) {
$freeze = $matches[1];
$line = preg_replace($pattern, '', $line);
$line .= " <attributes>\n <calculations_freeze>$freeze</calculations_freeze>\n </attributes>\n";
}
}
fputs($fw, $line);
}
if (!feof($fr)) {
throw new restore_step_exception('Error while attempting to rewrite the gradebook step file.');
}
fclose($fr);
fclose($fw);
if (!rename($newfile, $filepath)) {
throw new restore_step_exception('Error while attempting to rename the gradebook step file.');
}
} else {
if ($fr) {
fclose($fr);
}
if ($fw) {
fclose($fw);
}
}
}
}
/**
* Step in charge of restoring the grade history of a course.
*
* The execution conditions are itendical to {@link restore_gradebook_structure_step} because
* we do not want to restore the history if the gradebook and its content has not been
* restored. At least for now.
*/
class restore_grade_history_structure_step extends restore_structure_step {
protected function execute_condition() {
global $CFG, $DB;
if ($this->get_courseid() == SITEID) {
return false;
}
// No gradebook info found, don't execute.
$fullpath = $this->task->get_taskbasepath();
$fullpath = rtrim($fullpath, '/') . '/' . $this->filename;
if (!file_exists($fullpath)) {
return false;
}
// Some module present in backup file isn't available to restore in this site, don't execute.
if ($this->task->is_missing_modules()) {
return false;
}
// Some activity has been excluded to be restored, don't execute.
if ($this->task->is_excluding_activities()) {
return false;
}
// There should only be one grade category (the 1 associated with the course itself).
$category = new stdclass();
$category->courseid = $this->get_courseid();
$catcount = $DB->count_records('grade_categories', (array)$category);
if ($catcount > 1) {
return false;
}
// Arrived here, execute the step.
return true;
}
protected function define_structure() {
$paths = array();
// Settings to use.
$userinfo = $this->get_setting_value('users');
$history = $this->get_setting_value('grade_histories');
if ($userinfo && $history) {
$paths[] = new restore_path_element('grade_grade',
'/grade_history/grade_grades/grade_grade');
}
return $paths;
}
protected function process_grade_grade($data) {
global $DB;
$data = (object)($data);
$olduserid = $data->userid;
unset($data->id);
$data->userid = $this->get_mappingid('user', $data->userid, null);
if (!empty($data->userid)) {
// Do not apply the date offsets as this is history.
$data->itemid = $this->get_mappingid('grade_item', $data->itemid);
$data->oldid = $this->get_mappingid('grade_grades', $data->oldid);
$data->usermodified = $this->get_mappingid('user', $data->usermodified, null);
$data->rawscaleid = $this->get_mappingid('scale', $data->rawscaleid);
$DB->insert_record('grade_grades_history', $data);
} else {
$message = "Mapped user id not found for user id '{$olduserid}', grade item id '{$data->itemid}'";
$this->log($message, backup::LOG_DEBUG);
}
}
}
/**
* decode all the interlinks present in restored content
* relying 100% in the restore_decode_processor that handles
* both the contents to modify and the rules to be applied
*/
class restore_decode_interlinks extends restore_execution_step {
protected function define_execution() {
// Get the decoder (from the plan)
$decoder = $this->task->get_decoder();
restore_decode_processor::register_link_decoders($decoder); // Add decoder contents and rules
// And launch it, everything will be processed
$decoder->execute();
}
}
/**
* first, ensure that we have no gaps in section numbers
* and then, rebuid the course cache
*/
class restore_rebuild_course_cache extends restore_execution_step {
protected function define_execution() {
global $DB;
// Although there is some sort of auto-recovery of missing sections
// present in course/formats... here we check that all the sections
// from 0 to MAX(section->section) exist, creating them if necessary
$maxsection = $DB->get_field('course_sections', 'MAX(section)', array('course' => $this->get_courseid()));
// Iterate over all sections
for ($i = 0; $i <= $maxsection; $i++) {
// If the section $i doesn't exist, create it
if (!$DB->record_exists('course_sections', array('course' => $this->get_courseid(), 'section' => $i))) {
$sectionrec = array(
'course' => $this->get_courseid(),
'section' => $i);
$DB->insert_record('course_sections', $sectionrec); // missing section created
}
}
// Rebuild cache now that all sections are in place
rebuild_course_cache($this->get_courseid());
cache_helper::purge_by_event('changesincourse');
cache_helper::purge_by_event('changesincoursecat');
}
}
/**
* Review all the tasks having one after_restore method
* executing it to perform some final adjustments of information
* not available when the task was executed.
*/
class restore_execute_after_restore extends restore_execution_step {
protected function define_execution() {
// Simply call to the execute_after_restore() method of the task
// that always is the restore_final_task
$this->task->launch_execute_after_restore();
}
}
/**
* Review all the (pending) block positions in backup_ids, matching by
* contextid, creating positions as needed. This is executed by the
* final task, once all the contexts have been created
*/
class restore_review_pending_block_positions extends restore_execution_step {
protected function define_execution() {
global $DB;
// Get all the block_position objects pending to match
$params = array('backupid' => $this->get_restoreid(), 'itemname' => 'block_position');
$rs = $DB->get_recordset('backup_ids_temp', $params, '', 'itemid, info');
// Process block positions, creating them or accumulating for final step
foreach($rs as $posrec) {
// Get the complete position object out of the info field.
$position = backup_controller_dbops::decode_backup_temp_info($posrec->info);
// If position is for one already mapped (known) contextid
// process it now, creating the position, else nothing to
// do, position finally discarded
if ($newctx = restore_dbops::get_backup_ids_record($this->get_restoreid(), 'context', $position->contextid)) {
$position->contextid = $newctx->newitemid;
// Create the block position
$DB->insert_record('block_positions', $position);
}
}
$rs->close();
}
}
/**
* Updates the availability data for course modules and sections.
*
* Runs after the restore of all course modules, sections, and grade items has
* completed. This is necessary in order to update IDs that have changed during
* restore.
*
* @package core_backup
* @copyright 2014 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class restore_update_availability extends restore_execution_step {
protected function define_execution() {
global $CFG, $DB;
// Note: This code runs even if availability is disabled when restoring.
// That will ensure that if you later turn availability on for the site,
// there will be no incorrect IDs. (It doesn't take long if the restored
// data does not contain any availability information.)
// Get modinfo with all data after resetting cache.
rebuild_course_cache($this->get_courseid(), true);
$modinfo = get_fast_modinfo($this->get_courseid());
// Get the date offset for this restore.
$dateoffset = $this->apply_date_offset(1) - 1;
// Update all sections that were restored.
$params = array('backupid' => $this->get_restoreid(), 'itemname' => 'course_section');
$rs = $DB->get_recordset('backup_ids_temp', $params, '', 'newitemid');
$sectionsbyid = null;
foreach ($rs as $rec) {
if (is_null($sectionsbyid)) {
$sectionsbyid = array();
foreach ($modinfo->get_section_info_all() as $section) {
$sectionsbyid[$section->id] = $section;
}
}
if (!array_key_exists($rec->newitemid, $sectionsbyid)) {
// If the section was not fully restored for some reason
// (e.g. due to an earlier error), skip it.
$this->get_logger()->process('Section not fully restored: id ' .
$rec->newitemid, backup::LOG_WARNING);
continue;
}
$section = $sectionsbyid[$rec->newitemid];
if (!is_null($section->availability)) {
$info = new \core_availability\info_section($section);
$info->update_after_restore($this->get_restoreid(),
$this->get_courseid(), $this->get_logger(), $dateoffset, $this->task);
}
}
$rs->close();
// Update all modules that were restored.
$params = array('backupid' => $this->get_restoreid(), 'itemname' => 'course_module');
$rs = $DB->get_recordset('backup_ids_temp', $params, '', 'newitemid');
foreach ($rs as $rec) {
if (!array_key_exists($rec->newitemid, $modinfo->cms)) {
// If the module was not fully restored for some reason
// (e.g. due to an earlier error), skip it.
$this->get_logger()->process('Module not fully restored: id ' .
$rec->newitemid, backup::LOG_WARNING);
continue;
}
$cm = $modinfo->get_cm($rec->newitemid);
if (!is_null($cm->availability)) {
$info = new \core_availability\info_module($cm);
$info->update_after_restore($this->get_restoreid(),
$this->get_courseid(), $this->get_logger(), $dateoffset, $this->task);
}
}
$rs->close();
}
}
/**
* Process legacy module availability records in backup_ids.
*
* Matches course modules and grade item id once all them have been already restored.
* Only if all matchings are satisfied the availability condition will be created.
* At the same time, it is required for the site to have that functionality enabled.
*
* This step is included only to handle legacy backups (2.6 and before). It does not
* do anything for newer backups.
*
* @copyright 2014 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
*/
class restore_process_course_modules_availability extends restore_execution_step {
protected function define_execution() {
global $CFG, $DB;
// Site hasn't availability enabled
if (empty($CFG->enableavailability)) {
return;
}
// Do both modules and sections.
foreach (array('module', 'section') as $table) {
// Get all the availability objects to process.
$params = array('backupid' => $this->get_restoreid(), 'itemname' => $table . '_availability');
$rs = $DB->get_recordset('backup_ids_temp', $params, '', 'itemid, info');
// Process availabilities, creating them if everything matches ok.
foreach ($rs as $availrec) {
$allmatchesok = true;
// Get the complete legacy availability object.
$availability = backup_controller_dbops::decode_backup_temp_info($availrec->info);
// Note: This code used to update IDs, but that is now handled by the
// current code (after restore) instead of this legacy code.
// Get showavailability option.
$thingid = ($table === 'module') ? $availability->coursemoduleid :
$availability->coursesectionid;
$showrec = restore_dbops::get_backup_ids_record($this->get_restoreid(),
$table . '_showavailability', $thingid);
if (!$showrec) {
// Should not happen.
throw new coding_exception('No matching showavailability record');
}
$show = $showrec->info->showavailability;
// The $availability object is now in the format used in the old
// system. Interpret this and convert to new system.
$currentvalue = $DB->get_field('course_' . $table . 's', 'availability',
array('id' => $thingid), MUST_EXIST);
$newvalue = \core_availability\info::add_legacy_availability_condition(
$currentvalue, $availability, $show);
$DB->set_field('course_' . $table . 's', 'availability', $newvalue,
array('id' => $thingid));
}
}
$rs->close();
}
}
/*
* Execution step that, *conditionally* (if there isn't preloaded information)
* will load the inforef files for all the included course/section/activity tasks