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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Extract record vault preprocessor.
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*
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* @package mod_forum
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* @copyright 2019 Ryan Wyllie <ryan@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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namespace mod_forum\local\vaults\preprocessors;
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defined('MOODLE_INTERNAL') || die();
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use moodle_database;
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use core\dml\table as dml_table;
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/**
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* Extract record vault preprocessor.
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*
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* Extract record vault preprocessor. Typically used to separate out records
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* when two tables have been joined together in a query.
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*
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* @copyright 2019 Ryan Wyllie <ryan@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class extract_record {
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/** @var \core\dml\table $table The table object relating to the table that the records were loaded from */
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private $table;
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/**
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* Constructor.
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*
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* @param string $table The table name where the records were loaded from
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* @param string $alias The table alias used as the record property prefix
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*/
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public function __construct(string $table, string $alias) {
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$this->table = new dml_table($table, $alias, $alias);
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}
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/**
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* Extract a record embedded in the properties of another record out into a
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* separate record.
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*
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* @param stdClass[] $records The list of records to process
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* @return stdClass[] The extracted records
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*/
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public function execute(array $records): array {
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return array_map(function($record) {
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return $this->table->extract_from_result($record);
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}, $records);
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}
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}
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