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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/>.
/**
* Extract record vault preprocessor.
*
* @package mod_forum
* @copyright 2019 Ryan Wyllie <ryan@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace mod_forum\local\vaults\preprocessors;
defined('MOODLE_INTERNAL') || die();
use moodle_database;
use core\dml\table as dml_table;
/**
* Extract record vault preprocessor.
*
* Extract record vault preprocessor. Typically used to separate out records
* when two tables have been joined together in a query.
*
* @copyright 2019 Ryan Wyllie <ryan@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class extract_record {
/** @var \core\dml\table $table The table object relating to the table that the records were loaded from */
private $table;
/**
* Constructor.
*
* @param string $table The table name where the records were loaded from
* @param string $alias The table alias used as the record property prefix
*/
public function __construct(string $table, string $alias) {
$this->table = new dml_table($table, $alias, $alias);
}
/**
* Extract a record embedded in the properties of another record out into a
* separate record.
*
* @param stdClass[] $records The list of records to process
* @return stdClass[] The extracted records
*/
public function execute(array $records) : array {
return array_map(function($record) {
return $this->table->extract_from_result($record);
}, $records);
}
}
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