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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/>.

/**
 * Base class with shared stuff between backup controller and restore
 * controller.
 *
 * @package core_backup
 * @copyright 2013 The Open University
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
abstract class base_controller extends backup implements loggable {
    /**
     * @var \core\progress\base Progress reporting object.
     */
    protected $progress;

/**
     * @var base_logger Logging chain object (moodle, inline, fs, db, syslog)
     */
    protected $logger;

/**
     * Gets the progress reporter, which can be used to report progress within
     * the backup or restore process.
     *
     * @return \core\progress\base Progress reporting object
     */
    public function get_progress() {
        return $this->progress;
    }

/**
     * Sets the progress reporter.
     *
     * @param \core\progress\base $progress Progress reporting object
     */
    public function set_progress(\core\progress\base $progress) {
        $this->progress = $progress;
    }

/**
     * Gets first logger in logging chain.
     *
     * @return base_logger Logger
     */
    public function get_logger() {
        return $this->logger;
    }

/**
     * Inserts a new logger at end of logging chain.
     *
     * @param base_logger $logger New logger to add
     */
    public function add_logger(base_logger $logger) {
        $existing = $this->logger;
        while ($existing->get_next()) {
            $existing = $existing->get_next();
        }
        $existing->set_next($logger);
    }

/**
     * Logs data to the logger chain.
     *
     * @see loggable::log()
     */
    public function log($message, $level, $a = null, $depth = null, $display = false) {
        backup_helper::log($message, $level, $a, $depth, $display, $this->logger);
    }
}