mediawiki-skins-Vector/includes/FeatureManagement/Requirements/LatestSkinVersionRequirement.php

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<?php
/**
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @since 1.35
*/
namespace Vector\FeatureManagement\Requirements;
use Vector\Constants;
use Vector\FeatureManagement\Requirement;
use Vector\SkinVersionLookup;
/**
* Retrieve the skin version for the request and compare it with `Constants::SKIN_VERSION_LATEST`.
* This requirement is met if the two are equal.
*
* Skin version is evaluated in the following order:
*
* - `useskinversion` URL query parameter override. See `README.md`.
*
* - User preference. The `User` object for new and existing accounts are updated by hook according
* to the `VectorDefaultSkinVersionForNewAccounts` and
* `VectorDefaultSkinVersionForExistingAccounts` config values. See the `Vector\Hooks` class and
* `skin.json`.
*
* If the skin version is evaluated prior to `User` preference hook invocations, an incorrect
* version may be returned as only query parameter and site configuration will be known.
*
* - Site configuration default. The default is controlled by the `VectorDefaultSkinVersion` config
* value. This is used for anonymous users and as a fallback configuration. See `skin.json`.
*
* This majority of this class is taken from Stephen Niedzielski's `Vector\SkinVersionLookup` class,
* which was introduced in `d1072d0fdfb1`.
*
* @unstable
*
* @package Vector\FeatureManagement\Requirements
* @internal
*/
final class LatestSkinVersionRequirement implements Requirement {
/**
* @var SkinVersionLookup
*/
private $skinVersionLookup;
/**
* This constructor accepts all dependencies needed to obtain the skin version.
*
* @param SkinVersionLookup $skinVersionLookup
*/
public function __construct( SkinVersionLookup $skinVersionLookup ) {
$this->skinVersionLookup = $skinVersionLookup;
}
/**
* @inheritDoc
*/
public function getName() : string {
return Constants::REQUIREMENT_LATEST_SKIN_VERSION;
}
/**
* @inheritDoc
* @throws \ConfigException
*/
public function isMet() : bool {
return $this->skinVersionLookup->getVersion() === Constants::SKIN_VERSION_LATEST;
}
}