moodle/h5p/classes/editor_framework.php

<?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/>.

/**
 * Class \core_h5p\editor_framework
 *
 * @package    core_h5p
 * @copyright  2020 Victor Deniz <victor@moodle.com>, base on code by Joubel AS
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace core_h5p;

use H5peditorStorage;
use stdClass;

/**
 * Moodle's implementation of the H5P Editor storage interface.
 *
 * Makes it possible for the editor's core library to communicate with the
 * database used by Moodle.
 *
 * @package    core_h5p
 * @copyright  2020 Victor Deniz <victor@moodle.com>, base on code by Joubel AS
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class editor_framework implements H5peditorStorage {

    /**
     * Load language file(JSON).
     * Used to translate the editor fields(title, description etc.)
     *
     * @param string $name The machine readable name of the library(content type)
     * @param int $major Major part of version number
     * @param int $minor Minor part of version number
     * @param string $lang Language code
     *
     * @return string|boolean Translation in JSON format if available, false otherwise
     */
    public function getLanguage($name, $major, $minor, $lang) {
        // To be implemented when translations are introduced.
        return false;
    }

    /**
     * Load a list of available language codes.
     *
     * Until translations is implemented, only returns the "en" language.
     *
     * @param string $machinename The machine readable name of the library(content type)
     * @param int $major Major part of version number
     * @param int $minor Minor part of version number
     *
     * @return array List of possible language codes
     */
    public function getAvailableLanguages($machinename, $major, $minor): array {
        $defaultcode = 'en';
        $codes = [];

        // Semantics is 'en' by default.
        array_unshift($codes, $defaultcode);

        return $codes;
    }

    /**
     * "Callback" for mark the given file as a permanent file.
     *
     * Used when saving content that has new uploaded files.
     *
     * @param int $fileid
     */
    public function keepFile($fileid): void {
        // Temporal files will be removed on a task when they are in the "editor" file area and and are at least one day older.
    }

    /**
     * Return libraries details.
     *
     * Two use cases:
     * 1. No input, will list all the available content types.
     * 2. Libraries supported are specified, load additional data and verify
     * that the content types are available. Used by e.g. the Presentation Tool
     * Editor that already knows which content types are supported in its
     * slides.
     *
     * @param array $libraries List of library names + version to load info for.
     *
     * @return array List of all libraries loaded.
     */
    public function getLibraries($libraries = null): ?array {

        if ($libraries !== null) {
            // Get details for the specified libraries.
            $librariesin = [];
            $fields = 'title, runnable';

            foreach ($libraries as $library) {
                $params = [
                    'machinename' => $library->name,
                    'majorversion' => $library->majorVersion,
                    'minorversion' => $library->minorVersion
                ];

                $details = api::get_library_details($params, true, $fields);

                if ($details) {
                    $library->title = $details->title;
                    $library->runnable = $details->runnable;
                    $librariesin[] = $library;
                }
            }
        } else {
            $fields = 'id, machinename as name, title, majorversion, minorversion';
            $librariesin = api::get_contenttype_libraries($fields);
        }

        return $librariesin;
    }

    /**
     * Allow for other plugins to decide which styles and scripts are attached.
     *
     * This is useful for adding and/or modifying the functionality and look of
     * the content types.
     *
     * @param array $files List of files as objects with path and version as properties.
     * @param array $libraries List of libraries indexed by machineName with objects as values. The objects have majorVersion and
     *     minorVersion as properties.
     */
    public function alterLibraryFiles(&$files, $libraries): void {
        // This is to be implemented when the renderer is used.
    }

    /**
     * Saves a file or moves it temporarily.
     *
     * This is often necessary in order to validate and store uploaded or fetched H5Ps.
     *
     * @param string $data Uri of data that should be saved as a temporary file.
     * @param bool $movefile Can be set to TRUE to move the data instead of saving it.
     *
     * @return bool|object Returns false if saving failed or an object with path
     * of the directory and file that is temporarily saved.
     */
    public static function saveFileTemporarily($data, $movefile = false) {
        // This is to be implemented when the Hub client is used to upload libraries.
        return false;
    }

    /**
     * Marks a file for later cleanup.
     *
     * Useful when files are not instantly cleaned up. E.g. for files that are uploaded through the editor.
     *
     * @param int $file Id of file that should be cleaned up
     * @param int|null $contentid Content id of file
     */
    public static function markFileForCleanup($file, $contentid = null): ?int {
        // Temporal files will be removed on a task when they are in the "editor" file area and and are at least one day older.
        return null;
    }

    /**
     * Clean up temporary files
     *
     * @param string $filepath Path to file or directory
     */
    public static function removeTemporarilySavedFiles($filepath): void {
        // This is to be implemented when the Hub client is used to upload libraries.
    }
}