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|
<?php
namespace Studip\Middleware;
use Forum\Topic;
use NotificationCenter;
use Psr\Http\Message\ResponseFactoryInterface;
use Psr\Http\Message\{ResponseInterface as Response,
ServerRequestInterface as Request,
UriInterface
};
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
use Slim\App;
final class LegacyRedirectorMiddleware implements MiddlewareInterface
{
private array $legacyRoutes = [];
public function __construct(
private readonly App $app,
private readonly ResponseFactoryInterface $response_factory
) {
$this->addLegacyRoute(
'#^course/forum/index/index#',
[$this, 'redirectForumPost']
);
NotificationCenter::postNotification('LEGACY_REDIRECTOR_DID_CREATE', $this);
}
public function addLegacyRoute(string $route, callable $handler): void
{
$this->legacyRoutes[$route] = $handler;
}
public function process(Request $request, RequestHandlerInterface $handler): Response
{
$path = $this->getRelativePath($request);
foreach ($this->legacyRoutes as $legacyRoute => $routeHandler) {
if ($this->routeMatches($path, $legacyRoute)) {
/** @var UriInterface $newUri */
$newUri = $routeHandler($request);
$response = $this->response_factory->createResponse(301);
$response->getBody()->write('');
return $response->withHeader('Location', (string) $newUri);
}
}
return $handler->handle($request);
}
private function getRelativePath(Request $request): string
{
$basePath = $this->app->getBasePath();
$fullPath = $request->getUri()->getPath();
return ltrim(substr($fullPath, strlen($basePath)), '/');
}
private function routeMatches(string $path, string $route): bool
{
if (str_starts_with($route, '#') && str_ends_with($route, '#')) {
return preg_match($route, $path);
}
return str_starts_with($path, $route);
}
private function redirectForumPost(Request $request): UriInterface
{
$uri = $request->getUri();
$range_id = $request->getQueryParams()['cid'];
$forum_id = explode('/', $this->getRelativePath($request))[4] ?? null;
if ($forum_id === $range_id) {
$redirectUri = $uri->withPath(
str_replace(
'course/forum/index/index/' . $forum_id,
'course/forum/topics',
$uri->getPath()
)
);
} elseif (Topic::exists($forum_id)) {
$redirectUri = $uri->withPath(
str_replace(
'course/forum/index/index',
'course/forum/topics/show',
$uri->getPath()
)
);
} else {
$redirectUri = $uri->withPath(
str_replace(
'course/forum/index/index',
'course/forum/discussions/show',
$uri->getPath()
)
);
}
return $redirectUri;
}
}
|
