App\Endpoint\Web\Middleware\LocaleSelector

Complexity

Total Complexity

8

Size/Duplication

Total Lines	40
Duplicated Lines	0 %

Importance

Changes	1
Bugs	0	Features	0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	process()	0	16	4
A	__construct()	0	4	1
A	fetchLocales()	0	10	3

<?php

declare(strict_types=1);

namespace App\Endpoint\Web\Middleware;

use Psr\Http\Message\ResponseInterface;

The type Psr\Http\Message\ResponseInterface was not found. Maybe you did not declare it correctly or list all dependencies?

use Psr\Http\Message\ServerRequestInterface;

The type Psr\Http\Message\ServerRequestInterface was not found. Maybe you did not declare it correctly or list all dependencies?

use Psr\Http\Server\MiddlewareInterface;

The type Psr\Http\Server\MiddlewareInterface was not found. Maybe you did not declare it correctly or list all dependencies?

use Psr\Http\Server\RequestHandlerInterface;

The type Psr\Http\Server\RequestHandlerInterface was not found. Maybe you did not declare it correctly or list all dependencies?

use Spiral\Translator\Translator;

The type Spiral\Translator\Translator was not found. Maybe you did not declare it correctly or list all dependencies?

/**
 * The middleware that sets the application locale based on the "Accept-Language" header.
 * List of available locales is taken from the translator.
 */
final class LocaleSelector implements MiddlewareInterface
{
    /** @var string[] */
    private array $availableLocales;

    public function __construct(
        private readonly Translator $translator,
    ) {
        $this->availableLocales = $this->translator->getCatalogueManager()->getLocales();
    }

    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
    {
        $defaultLocale = $this->translator->getLocale();

        try {
            foreach ($this->fetchLocales($request) as $locale) {
                if ($locale !== '' && \in_array($locale, $this->availableLocales, true)) {
                    $this->translator->setLocale($locale);
                    break;
                }
            }

            return $handler->handle($request);
        } finally {
            // restore
            $this->translator->setLocale($defaultLocale);
        }
    }

    public function fetchLocales(ServerRequestInterface $request): \Generator
    {
        $header = $request->getHeaderLine('accept-language');
        foreach (\explode(',', $header) as $value) {
            $pos = \strpos($value, ';');
            if ($pos !== false) {
                yield \substr($value, 0, $pos);
            }

            yield $value;
        }
    }
}