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https://gerrit.wikimedia.org/r/mediawiki/skins/Vector.git
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120 lines
3.9 KiB
PHP
120 lines
3.9 KiB
PHP
<?php
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/**
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @since 1.35
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*/
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namespace Vector;
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use Config;
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use User;
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use WebRequest;
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/**
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* Given initial dependencies, retrieve the current skin version. This class does no parsing, just
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* the lookup.
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*
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* Skin version is evaluated in the following order:
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*
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* - useskinversion URL query parameter override. See readme.
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*
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* - User preference. The User object for new accounts is updated (persisted as a user preference)
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* by hook according to VectorDefaultSkinVersionForNewAccounts. See Hooks and skin.json. The user
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* may then change the preference at will.
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*
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* - Site configuration default. The default is controlled by VectorDefaultSkinVersion and
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* VectorDefaultSkinVersionForExistingAccounts based on login state. The former is used
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* for anonymous users and as a fallback configuration, the latter is logged in users (existing
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* accounts). See skin.json.
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*
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* @unstable
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*
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* @package Vector
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* @internal
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*/
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final class SkinVersionLookup {
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/**
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* @var WebRequest
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*/
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private $request;
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/**
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* @var User
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*/
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private $user;
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/**
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* @var Config
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*/
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private $config;
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/**
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* This constructor accepts all dependencies needed to obtain the skin version. The dependencies
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* are lazily evaluated, not cached, meaning they always return the current results.
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*
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* @param WebRequest $request
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* @param User $user
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* @param Config $config
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*/
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public function __construct( WebRequest $request, User $user, Config $config ) {
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$this->request = $request;
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$this->user = $user;
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$this->config = $config;
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}
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/**
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* Whether or not the legacy skin is being used.
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*
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* @return bool
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* @throws \ConfigException
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*/
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public function isLegacy(): bool {
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return $this->getVersion() === Constants::SKIN_VERSION_LEGACY;
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}
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/**
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* The skin version as a string. E.g., `Constants::SKIN_VERSION_LATEST`,
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* `Constants::SKIN_VERSION_LATEST`, or maybe 'beta'. Note: it's likely someone will put arbitrary
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* strings in the query parameter which means this function returns those strings as is.
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*
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* @return string
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* @throws \ConfigException
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*/
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public function getVersion(): string {
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// Obtain the skin version from the 1) `useskinversion` URL query parameter override, 2) the
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// user preference, 3) the configured default for logged in users, 4) or the site default.
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//
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// The latter two configurations cannot be set by `Hooks::onUserGetDefaultOptions()` as user
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// sessions are unavailable at that time so it's not possible to determine whether the
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// preference is for a logged in user or an anonymous user. Since new users are known to have
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// had their user preferences initialized in `Hooks::onLocalUserCreated()`, that means all
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// subsequent requests to `User->getOption()` that do not have a preference set are either
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// existing accounts or anonymous users. Login state makes the distinction.
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return (string)$this->request->getVal(
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Constants::QUERY_PARAM_SKIN_VERSION,
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$this->user->getOption(
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Constants::PREF_KEY_SKIN_VERSION,
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$this->config->get(
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$this->user->isRegistered()
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? Constants::CONFIG_KEY_DEFAULT_SKIN_VERSION_FOR_EXISTING_ACCOUNTS
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: Constants::CONFIG_KEY_DEFAULT_SKIN_VERSION
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)
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)
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);
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}
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}
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