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MDL-67057 core_h5p: Add helper class

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Sara Arjona 2019-10-29 20:19:33 +01:00 • committed by Andrew Nicols
parent 01aa126848
commit 5a266a579c
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h5p/classes/helper.php Normal file
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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/>.
/**
* Contains helper class for the H5P area.
*
* @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();
/**
* Helper class for the H5P area.
*
* @copyright 2019 Sara Arjona <sara@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class helper {
/**
* Store an H5P file.
*
* @param factory $factory The \core_h5p\factory object
* @param stored_file $file Moodle file instance
* @param stdClass $config Button options config
* @param bool $onlyupdatelibs Whether new libraries can be installed or only the existing ones can be updated
* @param bool $skipcontent Should the content be skipped (so only the libraries will be saved)?
*
* @return int|false|null The H5P identifier or null if there is an error when saving or false if it's not a valid H5P package
*/
public static function save_h5p(factory $factory, \stored_file $file, \stdClass $config, bool $onlyupdatelibs = false,
bool $skipcontent = false) {
// This may take a long time.
\core_php_time_limit::raise();
$core = $factory->get_core();
$path = $core->fs->getTmpPath();
$core->h5pF->getUploadedH5pFolderPath($path);
// Add manually the extension to the file to avoid the validation fails.
$path .= '.h5p';
$core->h5pF->getUploadedH5pPath($path);
// Copy the .h5p file to the temporary folder.
$file->copy_content_to($path);
// Check if the h5p file is valid before saving it.
$h5pvalidator = $factory->get_validator();
if ($h5pvalidator->isValidPackage($skipcontent, $onlyupdatelibs)) {
$h5pstorage = $factory->get_storage();
$content = [
'pathnamehash' => $file->get_pathnamehash(),
'contenthash' => $file->get_contenthash(),
];
$options = ['disable' => self::get_display_options($core, $config)];
$h5pstorage->savePackage($content, null, $skipcontent, $options);
return $h5pstorage->contentId;
}
return false;
}
/**
* Get the representation of display options as int.
*
* @param core $core The \core_h5p\core object
* @param stdClass $config Button options config
*
* @return int The representation of display options as int
*/
public static function get_display_options(core $core, \stdClass $config): int {
$export = isset($config->export) ? $config->export : 0;
$embed = isset($config->embed) ? $config->embed : 0;
$copyright = isset($config->copyright) ? $config->copyright : 0;
$frame = ($export || $embed || $copyright);
if (!$frame) {
$frame = isset($config->frame) ? $config->frame : 0;
}
$disableoptions = [
core::DISPLAY_OPTION_FRAME => $frame,
core::DISPLAY_OPTION_DOWNLOAD => $export,
core::DISPLAY_OPTION_EMBED => $embed,
core::DISPLAY_OPTION_COPYRIGHT => $copyright,
];
return $core->getStorableDisplayOptions($disableoptions, 0);
}
/**
* Checks if the author of the .h5p file is "trustable". If the file hasn't been uploaded by a user with the
* required capability, the content won't be deployed.
*
* @param stored_file $file The .h5p file to be deployed
* @return bool Returns true if the file can be deployed, false otherwise.
*/
public static function can_deploy_package(\stored_file $file): bool {
if (is_null($file)) {
debugging('\core_h5p\h5p::can_deploy_package() now expects a \'file\' to be passed.',
DEBUG_DEVELOPER);
return false;
}
$context = \context::instance_by_id($file->get_contextid());
if (has_capability('moodle/h5p:deploy', $context, $file->get_userid())) {
return true;
}
return false;
}
/**
* Checks if the content-type libraries can be upgraded.
* The H5P content-type libraries can only be upgraded if the author of the .h5p file can manage content-types or if all the
* content-types exist, to avoid users without the required capability to upload malicious content.
*
* @param stored_file $file The .h5p file to be deployed
* @return bool Returns true if the content-type libraries can be created/updated, false otherwise.
*/
public static function can_update_library(\stored_file $file): bool {
if (is_null($file)) {
debugging('\core_h5p\h5p::can_update_library() now expects a \'file\' to be passed.',
DEBUG_DEVELOPER);
return false;
}
$context = \context::instance_by_id($file->get_contextid());
// Check if the owner of the .h5p file has the capability to manage content-types.
if (has_capability('moodle/h5p:updatelibraries', $context, $file->get_userid())) {
return true;
}
return false;
}
/**
* Convenience to take a fixture test file and create a stored_file.
*
* @param string $filepath The filepath of the file
* @param int $userid The author of the file
* @param \context $context The context where the file will be created
* @return stored_file The file created
*/
public static function create_fake_stored_file_from_path(string $filepath, int $userid = 0,
\context $context = null): \stored_file {
if (is_null($context)) {
$context = \context_system::instance();
}
$filerecord = [
'contextid' => $context->id,
'component' => 'core_h5p',
'filearea' => 'unittest',
'itemid' => rand(),
'filepath' => '/',
'filename' => basename($filepath),
];
if (!is_null($userid)) {
$filerecord['userid'] = $userid;
}
$fs = get_file_storage();
return $fs->create_file_from_pathname($filerecord, $filepath);
}
}