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See Release Notes

  • Bug fixes for general core bugs in 3.10.x will end 8 November 2021 (12 months).
  • Bug fixes for security issues in 3.10.x will end 9 May 2022 (18 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/>.

/**
 * H5P core class.
 *
 * @package    core_h5p
 * @copyright  2019 Sara Arjona <sara@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace core_h5p;

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

require_once("$CFG->libdir/filelib.php");

use Moodle\H5PCore;
use Moodle\H5PFrameworkInterface;
use Moodle\H5PHubEndpoints;
use stdClass;
use moodle_url;
use core_h5p\local\library\autoloader;

/**
 * H5P core class, containing functions and storage shared by the other H5P classes.
 *
 * @package    core_h5p
 * @copyright  2019 Sara Arjona <sara@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class core extends H5PCore {

    /** @var array The array containing all the present libraries */
    protected $libraries;

    /**
     * Constructor for core_h5p/core.
     *
     * @param H5PFrameworkInterface $framework The frameworks implementation of the H5PFrameworkInterface
     * @param string|H5PFileStorage $path The H5P file storage directory or class
     * @param string $url The URL to the file storage directory
     * @param string $language The language code. Defaults to english
     * @param boolean $export Whether export is enabled
     */
    public function __construct(H5PFrameworkInterface $framework, $path, string $url, string $language = 'en',
            bool $export = false) {

        parent::__construct($framework, $path, $url, $language, $export);

        // Aggregate the assets by default.
        $this->aggregateAssets = true;
    }

    /**
     * Get the path to the dependency.
     *
     * @param array $dependency An array containing the information of the requested dependency library
     * @return string The path to the dependency library
     */
    protected function getDependencyPath(array $dependency): string {
        $library = $this->find_library($dependency);

        return "libraries/{$library->id}/{$library->machinename}-{$library->majorversion}.{$library->minorversion}";
    }

    /**
     * Get the paths to the content dependencies.
     *
     * @param int $id The H5P content ID
     * @return array An array containing the path of each content dependency
     */
    public function get_dependency_roots(int $id): array {
        $roots = [];
        $dependencies = $this->h5pF->loadContentDependencies($id);
        $context = \context_system::instance();
        foreach ($dependencies as $dependency) {
            $library = $this->find_library($dependency);
            $roots[self::libraryToString($dependency, true)] = (moodle_url::make_pluginfile_url(
                $context->id,
                'core_h5p',
                'libraries',
                $library->id,
                "/" . self::libraryToString($dependency, true),
                ''
            ))->out(false);
        }

        return $roots;
    }

    /**
     * Get a particular dependency library.
     *
     * @param array $dependency An array containing information of the dependency library
     * @return stdClass|null The library object if the library dependency exists, null otherwise
     */
    protected function find_library(array $dependency): ?\stdClass {
        global $DB;
        if (null === $this->libraries) {
            $this->libraries = $DB->get_records('h5p_libraries');
        }

        $major = $dependency['majorVersion'];
        $minor = $dependency['minorVersion'];
        $patch = $dependency['patchVersion'];

        foreach ($this->libraries as $library) {
            if ($library->machinename !== $dependency['machineName']) {
                continue;
            }

            if ($library->majorversion != $major) {
                continue;
            }
            if ($library->minorversion != $minor) {
                continue;
            }
            if ($library->patchversion != $patch) {
                continue;
            }

            return $library;
        }

        return null;
    }

    /**
     * Get the list of JS scripts to include on the page.
     *
     * @return array The array containg urls of the core JavaScript files
     */
    public static function get_scripts(): array {
        global $PAGE;

        $jsrev = $PAGE->requires->get_jsrev();
        $urls = [];
        foreach (self::$scripts as $script) {
            $urls[] = autoloader::get_h5p_core_library_url($script, [
                'ver' => $jsrev,
            ]);
        }
        $urls[] = new moodle_url("/h5p/js/h5p_overrides.js", [
            'ver' => $jsrev,
        ]);

        return $urls;
    }

    /**
     * Fetch and install the latest H5P content types libraries from the official H5P repository.
     * If the latest version of a content type library is present in the system, nothing is done for that content type.
     *
     * @return stdClass
     */
    public function fetch_latest_content_types(): ?\stdClass {

        $contenttypes = $this->get_latest_content_types();
        if (!empty($contenttypes->error)) {
            return $contenttypes;
        }

        $typesinstalled = [];

        $factory = new factory();
        $framework = $factory->get_framework();

        foreach ($contenttypes->contentTypes as $type) {
> // Don't fetch content types if any of the versions is disabled. // Don't fetch content types that require a higher H5P core API version. > $librarydata = (object) ['machinename' => $type->id]; if (!$this->is_required_core_api($type->coreApiVersionNeeded)) { > if (!api::is_library_enabled($librarydata)) { continue; > continue; } > }
$library = [ 'machineName' => $type->id, 'majorVersion' => $type->version->major, 'minorVersion' => $type->version->minor, 'patchVersion' => $type->version->patch, ]; // Add example and tutorial to the library, to store this information too. if (isset($type->example)) { $library['example'] = $type->example; } if (isset($type->tutorial)) { $library['tutorial'] = $type->tutorial; } $shoulddownload = true; if ($framework->getLibraryId($type->id, $type->version->major, $type->version->minor)) { if (!$framework->isPatchedLibrary($library)) { $shoulddownload = false; } } if ($shoulddownload) { $installed['id'] = $this->fetch_content_type($library); if ($installed['id']) { $installed['name'] = H5PCore::libraryToString($library); $typesinstalled[] = $installed; } } } $result = new stdClass(); $result->error = ''; $result->typesinstalled = $typesinstalled; return $result; } /** * Given an H5P content type machine name, fetch and install the required library from the official H5P repository. * * @param array $library Library machineName, majorversion and minorversion. * @return int|null Returns the id of the content type library installed, null otherwise. */ public function fetch_content_type(array $library): ?int { global $DB; $factory = new factory();
< // Download the latest content type from the H5P official repository.
$fs = get_file_storage();
> $file = $fs->create_file_from_url( > // Delete any existing file, if it was not deleted during a previous download. (object) [ > $existing = $fs->get_file( 'component' => 'core_h5p', > (\context_system::instance())->id, 'filearea' => 'library_sources', > 'core_h5p', 'itemid' => 0, > 'library_sources', 'contextid' => (\context_system::instance())->id, > 0, 'filepath' => '/', > '/', 'filename' => $library['machineName'], > $library['machineName'] ], > ); $this->get_api_endpoint($library['machineName']), > if ($existing) { null, > $existing->delete(); true > } ); > > // Download the latest content type from the H5P official repository.
if (!$file) { return null; } helper::save_h5p($factory, $file, (object) [], false, true); $file->delete(); $librarykey = static::libraryToString($library);
< $libraryid = $factory->get_storage()->h5pC->librariesJsonData[$librarykey]["libraryId"];
> > $libraryjson = $factory->get_storage()->h5pC->librariesJsonData[$librarykey]; > if (!array_key_exists('libraryId', $libraryjson)) { > return null; > } > > $libraryid = $libraryjson['libraryId'];
// Update example and tutorial (if any of them are defined in $library). $params = ['id' => $libraryid]; if (array_key_exists('example', $library)) { $params['example'] = $library['example']; } if (array_key_exists('tutorial', $library)) { $params['tutorial'] = $library['tutorial']; } if (count($params) > 1) { $DB->update_record('h5p_libraries', $params); } return $libraryid; } /** * Get H5P endpoints. * * If $endpoint = 'content' and $library is null, moodle_url is the endpoint of the latest version of the H5P content * types; however, if $library is the machine name of a content type, moodle_url is the endpoint to download the content type. * The SITES endpoint ($endpoint = 'site') may be use to get a site UUID or send site data. * * @param string|null $library The machineName of the library whose endpoint is requested. * @param string $endpoint The endpoint required. Valid values: "site", "content". * @return moodle_url The endpoint moodle_url object. */ public function get_api_endpoint(?string $library = null, string $endpoint = 'content'): moodle_url { if ($endpoint == 'site') { $h5purl = H5PHubEndpoints::createURL(H5PHubEndpoints::SITES ); } else if ($endpoint == 'content') { $h5purl = H5PHubEndpoints::createURL(H5PHubEndpoints::CONTENT_TYPES ) . $library; } return new moodle_url($h5purl); } /** * Get the latest version of the H5P content types available in the official repository. * * @return stdClass An object with 2 properties: * - string error: error message when there is any problem, empty otherwise * - array contentTypes: an object for each H5P content type with its information */ public function get_latest_content_types(): \stdClass { global $CFG; $siteuuid = $this->get_site_uuid() ?? md5($CFG->wwwroot); $postdata = ['uuid' => $siteuuid]; // Get the latest content-types json. $endpoint = $this->get_api_endpoint(); $request = download_file_content($endpoint, null, $postdata, true); if (!empty($request->error) || $request->status != '200' || empty($request->results)) { if (empty($request->error)) { $request->error = get_string('fetchtypesfailure', 'core_h5p'); } return $request; } $contenttypes = json_decode($request->results); $contenttypes->error = ''; return $contenttypes; } /** * Get the site UUID. If site UUID is not defined, try to register the site. * * return $string The site UUID, null if it is not set. */ public function get_site_uuid(): ?string { // Check if the site_uuid is already set. $siteuuid = get_config('core_h5p', 'site_uuid'); if (!$siteuuid) { $siteuuid = $this->register_site(); } return $siteuuid; } /** * Get H5P generated site UUID. * * return ?string Returns H5P generated site UUID, null if can't get it. */ private function register_site(): ?string { $endpoint = $this->get_api_endpoint(null, 'site'); $siteuuid = download_file_content($endpoint, null, ''); // Successful UUID retrieval from H5P. if ($siteuuid) { $json = json_decode($siteuuid); if (isset($json->uuid)) { set_config('site_uuid', $json->uuid, 'core_h5p'); return $json->uuid; } } return null; } /** * Checks that the required H5P core API version or higher is installed. * * @param stdClass $coreapi Object with properties major and minor for the core API version required. * @return bool True if the required H5P core API version is installed. False if not. */ public function is_required_core_api($coreapi): bool { if (isset($coreapi) && !empty($coreapi)) { if (($coreapi->major > H5PCore::$coreApi['majorVersion']) || (($coreapi->major == H5PCore::$coreApi['majorVersion']) && ($coreapi->minor > H5PCore::$coreApi['minorVersion']))) { return false; } } return true; } /** * Get the library string from a DB library record. * * @param stdClass $record The DB library record. * @param bool $foldername If true, use hyphen instead of space in returned string. * @return string The string name on the form {machineName} {majorVersion}.{minorVersion}. */ public static function record_to_string(stdClass $record, bool $foldername = false): string { return static::libraryToString([ 'machineName' => $record->machinename, 'majorVersion' => $record->majorversion, 'minorVersion' => $record->minorversion, ], $foldername); } }