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See Release Notes
Long Term Support Release

  • Bug fixes for general core bugs in 3.9.x will end* 10 May 2021 (12 months).
  • Bug fixes for security issues in 3.9.x will end* 8 May 2023 (36 months).
  • PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
<?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/>.

/**
 * This file contains the interface required to implmeent a content writer.
 *
 * @package core_privacy
 * @copyright 2018 Andrew Nicols <andrew@nicols.co.uk>
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
namespace core_privacy\local\request;

defined('MOODLE_INTERNAL') || die();

/**
 * The writer factory class used to fetch and work with the content_writer.
 *
 * @copyright 2018 Andrew Nicols <andrew@nicols.co.uk>
 * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class writer {
    /**
     * @var writer The singleton instance of this writer.
     */
    protected static $instance = null;

    /**
     * @var content_writer The current content_writer instance.
     */
    protected $realwriter = null;

    /**
     * Constructor for the content writer.
     *
     * Protected to prevent direct instantiation.
     */
    protected function __construct() {
    }

    /**
     * Singleton to return or create and return a copy of a content_writer.
     *
     * @return  content_writer
     */
    protected function get_writer_instance() : content_writer {
        if (null === $this->realwriter) {
            if (PHPUNIT_TEST) {
                $this->realwriter = new \core_privacy\tests\request\content_writer(static::instance());
            } else {
                $this->realwriter = new moodle_content_writer(static::instance());
            }
        }

        return $this->realwriter;
    }

    /**
     * Create a real content_writer for use by PHPUnit tests,
     * where a mock writer will not suffice.
     *
     * @return  content_writer
     */
    public static function setup_real_writer_instance() {
        if (!PHPUNIT_TEST) {
< throw new coding_exception('setup_real_writer_instance() is only for use with PHPUnit tests.');
> throw new \coding_exception('setup_real_writer_instance() is only for use with PHPUnit tests.');
} $instance = static::instance(); if (null === $instance->realwriter) { $instance->realwriter = new moodle_content_writer(static::instance()); } } /** * Return an instance of */ protected static final function instance() { if (null === self::$instance) { self::$instance = new static(); } return self::$instance; } /** * Reset the writer and content_writer. */ public static final function reset() { static::$instance = null; } /** * Provide an instance of the writer with the specified context applied. * * @param \context $context The context to apply * @return content_writer The content_writer */ public static function with_context(\context $context) : content_writer { return static::instance() ->get_writer_instance() ->set_context($context); } /** * Export the specified user preference. * * @param string $component The name of the component. * @param string $key The name of th key to be exported. * @param string $value The value of the preference * @param string $description A description of the value * @return content_writer */ public static function export_user_preference( string $component, string $key, string $value, string $description ) : content_writer { return static::with_context(\context_system::instance()) ->export_user_preference($component, $key, $value, $description); } }