app/Http/Middleware/UseTheme.php
<?php
/**
* webtrees: online genealogy
* Copyright (C) 2023 webtrees development team
* 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 3 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, see <https://www.gnu.org/licenses/>.
*/
declare(strict_types=1);
namespace Fisharebest\Webtrees\Http\Middleware;
use Fisharebest\Webtrees\Module\ModuleThemeInterface;
use Fisharebest\Webtrees\Module\WebtreesTheme;
use Fisharebest\Webtrees\Registry;
use Fisharebest\Webtrees\Services\ModuleService;
use Fisharebest\Webtrees\Session;
use Fisharebest\Webtrees\Site;
use Generator;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
/**
* Middleware to select a theme.
*/
class UseTheme implements MiddlewareInterface
{
private ModuleService $module_service;
/**
* @param ModuleService $module_service
*/
public function __construct(ModuleService $module_service)
{
$this->module_service = $module_service;
}
/**
* @param ServerRequestInterface $request
* @param RequestHandlerInterface $handler
*
* @return ResponseInterface
*/
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
{
foreach ($this->themes() as $theme) {
if ($theme instanceof ModuleThemeInterface) {
Registry::container()->set(ModuleThemeInterface::class, $theme);
$request = $request->withAttribute('theme', $theme);
Session::put('theme', $theme->name());
break;
}
}
return $handler->handle($request);
}
/**
* The theme can be chosen in various ways.
*
* @return Generator<ModuleThemeInterface|null>
*/
private function themes(): Generator
{
$themes = $this->module_service->findByInterface(ModuleThemeInterface::class);
// Last theme used
yield $themes
->first(static fn (ModuleThemeInterface $module): bool => $module->name() === Session::get('theme'));
// Default for site
yield $themes
->first(static fn (ModuleThemeInterface $module): bool => $module->name() === Site::getPreference('THEME_DIR'));
// Default for application
yield new WebtreesTheme();
}
}