Added new Cookie locale resolver

src/LocalesResolvers/Cookie.php

@@ -0,0 +1,58 @@
+<?php declare(strict_types=1);
+
+namespace Contributte\Translation\LocalesResolvers;
+
+use Contributte\Translation\Translator;
+use Nette\Http\IRequest;
+use Nette\Http\IResponse;
+
+class Cookie implements ResolverInterface
+{
+
+	public static string $parameter = 'locale';
+
+	public static string $expire = '+1 year';
+
+	private IRequest $httpRequest;
+
+	private IResponse $httpResponse;
+
+	public function __construct(
+		IRequest $httpRequest,
+		IResponse $httpResponse,
+	)
+	{
+		$this->httpRequest = $httpRequest;
+		$this->httpResponse = $httpResponse;
+	}
+
+	public function setLocale(
+		?string $locale,
+		?string $expire = null,
+	): self
+	{
+		if (is_string($locale)) {
+			$this->httpResponse->setCookie(self::$parameter, $locale, $expire ?? self::$expire);
+
+		} else {
+			$this->httpResponse->deleteCookie(self::$parameter);
+
+		}
+
+		return $this;
+	}
+
+	public function resolve(
+		Translator $translator,
+	): ?string
+	{
+		$locale = $this->httpRequest->getCookie(self::$parameter);
+
+		if (is_string($locale)) {
+			return $locale;
+		}
+
+		return null;
+	}
+
+}

tests/Tests/LocalesResolvers/CookieTest.phpt

@@ -0,0 +1,68 @@
+<?php declare(strict_types = 1);
+
+namespace Tests\LocalesResolvers;
+
+use Contributte\Translation\FallbackResolver;
+use Contributte\Translation\LocaleResolver;
+use Contributte\Translation\LocalesResolvers\Cookie;
+use Contributte\Translation\Translator;
+use Mockery;
+use Nette\Http\IRequest;
+use Nette\Http\IResponse;
+use Tester\Assert;
+use Tests\TestAbstract;
+
+$container = require __DIR__ . '/../../bootstrap.php';
+
+final class CookieTest extends TestAbstract
+{
+
+	private static array $cookies;
+
+	public function test01(): void
+	{
+		self::$cookies = [];
+
+		Assert::null($this->resolve(null));
+		Assert::same('cs', $this->resolve('cs'));
+		Assert::same('en', $this->resolve('en'));
+		Assert::null($this->resolve(null));
+	}
+
+	private function resolve(
+		?string $locale
+	): ?string
+	{
+		$response = Mockery::mock(IResponse::class);
+		$response->shouldReceive('setCookie')->andReturnUsing(function ($name, $value) {
+			self::$cookies[$name] = $value;
+			self::$cookies = array_filter(self::$cookies);
+		});
+		$response->shouldReceive('deleteCookie')->andReturnUsing(function ($name) {
+			unset(self::$cookies[$name]);
+		});
+
+		$request = Mockery::mock(IRequest::class);
+		$request->shouldReceive('getCookie')->andReturnUsing(function ($name) {
+			return self::$cookies[$name] ?? null;
+		});
+
+		$resolver = new Cookie(
+			$request,
+			$response,
+		);
+
+		$translator = new Translator(
+			new LocaleResolver($this->container),
+			new FallbackResolver(),
+			'en'
+		);
+
+		$resolver->setLocale($locale);
+
+		return $resolver->resolve($translator);
+	}
+
+}
+
+(new CookieTest($container))->run();