Move middleware to a subfolder

classes/Middleware/LocaleMiddleware.php

@@ -0,0 +1,86 @@
+<?php
+
+/**
+ * LocaleMiddleware class.
+ */
+
+namespace Alltube\Middleware;
+
+use Alltube\Locale;
+use Alltube\LocaleManager;
+use Psr\Container\ContainerInterface;
+use Slim\Http\Request;
+use Slim\Http\Response;
+use Teto\HTTP\AcceptLanguage;
+
+/**
+ * Detect user locale.
+ */
+class LocaleMiddleware
+{
+    /**
+     * LocaleManager instance.
+     *
+     * @var LocaleManager
+     */
+    private $localeManager;
+
+    /**
+     * LocaleMiddleware constructor.
+     *
+     * @param ContainerInterface $container Slim dependency container
+     */
+    public function __construct(ContainerInterface $container)
+    {
+        $this->localeManager = $container->get('locale');
+    }
+
+    /**
+     * Test if a locale can be used for the current user.
+     *
+     * @param mixed[] $proposedLocale Locale array created by AcceptLanguage::parse()
+     *
+     * @return Locale|null Locale if chosen, nothing otherwise
+     */
+    public function testLocale(array $proposedLocale)
+    {
+        foreach ($this->localeManager->getSupportedLocales() as $locale) {
+            $parsedLocale = AcceptLanguage::parse($locale);
+            if (
+                isset($proposedLocale['language'])
+                && $parsedLocale[1]['language'] == $proposedLocale['language']
+                && $parsedLocale[1]['region'] == $proposedLocale['region']
+            ) {
+                return new Locale($proposedLocale['language'] . '_' . $proposedLocale['region']);
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * Main middleware function.
+     *
+     * @param Request $request PSR request
+     * @param Response $response PSR response
+     * @param callable $next Next middleware
+     *
+     * @return Response
+     */
+    public function __invoke(Request $request, Response $response, callable $next)
+    {
+        $headers = $request->getHeader('Accept-Language');
+        $curLocale = $this->localeManager->getLocale();
+        if (is_null($curLocale)) {
+            if (isset($headers[0])) {
+                $this->localeManager->setLocale(
+                    AcceptLanguage::detect([$this, 'testLocale'], new Locale('en_US'), $headers[0])
+                );
+            } else {
+                $this->localeManager->setLocale(new Locale('en_US'));
+            }
+        }
+
+        return $next($request, $response);
+    }
+}