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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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* Backup implementation for the (tool_log) logstore_database nested element.
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*
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* @package logstore_database
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* @category backup
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* @copyright 2015 Damyon Wiese <damyon@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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defined('MOODLE_INTERNAL') || die();
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/**
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* Custom subclass of backup_nested_element that iterates over an external DB connection.
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*
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* @package logstore_database
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* @category backup
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* @copyright 2015 Damyon Wiese <damyon@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 backup_logstore_database_nested_element extends backup_nested_element {
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/**
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* @var \moodle_database $sourcedb
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*/
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protected $sourcedb;
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/**
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* Constructor - instantiates one backup_nested_element, specifying its basic info.
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*
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* @param string $name name of the element
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* @param array $attributes attributes this element will handle (optional, defaults to null)
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* @param array $finalelements this element will handle (optional, defaults to null)
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*/
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public function __construct($name, $attributes = null, $finalelements = null) {
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global $DB;
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parent::__construct($name, $attributes, $finalelements);
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$this->sourcedb = $DB;
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}
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/**
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* For sql or table datasources, this will iterate over the "external" DB connection
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* stored in this class instead of the default $DB. All other cases use the parent default.
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* @param object $processor the processor
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*/
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protected function get_iterator($processor) {
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if ($this->get_source_table() !== null) { // It's one table, return recordset iterator.
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return $this->get_source_db()->get_recordset(
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$this->get_source_table(),
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backup_structure_dbops::convert_params_to_values($this->procparams, $processor),
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$this->get_source_table_sortby()
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);
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} else if ($this->get_source_sql() !== null) { // It's one sql, return recordset iterator.
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return $this->get_source_db()->get_recordset_sql(
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$this->get_source_sql(),
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backup_structure_dbops::convert_params_to_values($this->procparams, $processor)
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);
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}
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return parent::get_iterator($processor);
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}
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/**
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* Set the database we want to use.
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*
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* @param \moodle_database $db
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*/
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public function set_source_db($db) {
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$this->sourcedb = $db;
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}
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/**
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* Get the database we want to use.
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*
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* @return \moodle_database $db
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*/
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public function get_source_db() {
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return $this->sourcedb;
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}
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}
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