From 8d4ef5daa7efb12c91474834d9b8e588fd96893f Mon Sep 17 00:00:00 2001
From: Mehmet Korkmaz <mehmet@mkorkmaz.com>
Date: Thu, 28 Jan 2021 00:29:35 +0300
Subject: [PATCH] language selector middleware added

---
 composer.json                                 |  7 +-
 .../Middleware/LanguageSelectorMiddleware.php | 76 +++++++++++++++++++
 .../LanguageSelectorMiddlewareFactory.php     | 18 +++++
 3 files changed, 97 insertions(+), 4 deletions(-)
 create mode 100644 src/BackendBase/Shared/Middleware/LanguageSelectorMiddleware.php
 create mode 100644 src/BackendBase/Shared/Middleware/LanguageSelectorMiddlewareFactory.php

diff --git a/composer.json b/composer.json
index 602bb77..734c1a0 100644
--- a/composer.json
+++ b/composer.json
@@ -67,7 +67,7 @@
         "laminas/laminas-diactoros": "^2.5.0",
         "laminas/laminas-inputfilter": "^2.11.0",
         "laminas/laminas-permissions-rbac": "^3.0.2",
-        "laminas/laminas-servicemanager": "^3.6.2",
+        "laminas/laminas-servicemanager": "^3.6.3",
         "laminas/laminas-stdlib": "^3.3.1",
         "lcobucci/jwt": "^4.0.0",
         "league/flysystem": "^1.1.3",
@@ -76,7 +76,7 @@
         "mezzio/mezzio-csrf": "^1.0.1",
         "mezzio/mezzio-fastroute": "^3.1.0",
         "mezzio/mezzio-helpers": "^5.4.0",
-        "mezzio/mezzio-problem-details": "^1.2.0",
+        "mezzio/mezzio-problem-details": "^1.3.0",
         "mezzio/mezzio-session-ext": "^1.10.0",
         "mezzio/mezzio-twigrenderer": "^2.6.1",
         "mkorkmaz/redislabs-rejson": "^1.0",
@@ -108,12 +108,11 @@
         "filp/whoops": "^2.9.2",
         "laminas/laminas-development-mode": "^3.3.0",
         "malukenho/mcbumpface": "^1.1.5",
-        "mezzio/mezzio-tooling": "^1.3.0",
         "phpunit/phpunit": "^9.5.1",
         "roave/security-advisories": "dev-master",
         "rskuipers/php-assumptions": "^0.8.0",
         "squizlabs/php_codesniffer": "^3.5.8",
-        "swoole/ide-helper": "^4.6.1"
+        "swoole/ide-helper": "^4.6.2"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/BackendBase/Shared/Middleware/LanguageSelectorMiddleware.php b/src/BackendBase/Shared/Middleware/LanguageSelectorMiddleware.php
new file mode 100644
index 0000000..ddec603
--- /dev/null
+++ b/src/BackendBase/Shared/Middleware/LanguageSelectorMiddleware.php
@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+namespace BackendBase\Shared\Middleware;
+
+use Locale;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use const LC_ALL;
+use function bind_textdomain_codeset;
+use function bindtextdomain;
+use function copy;
+use function file_exists;
+use function filemtime;
+use function glob;
+use function putenv;
+use function setlocale;
+use function textdomain;
+use function unlink;
+
+final class LanguageSelectorMiddleware implements MiddlewareInterface
+{
+    private $config;
+
+    public function __construct(array $config)
+    {
+        $this->config = $config;
+    }
+
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler) : ResponseInterface
+    {
+        $uri = $request->getUri();
+        $url = $uri->getPath();
+        $selectedLanguage = $this->config['multilingual']['default-language'];
+        if ($url !== '/') {
+            $urlParts = explode('/', trim($url, '/'));
+            $lang = array_shift($urlParts);
+            if (in_array($lang, $this->config['multilingual']['valid-languages'])) {
+                $selectedLanguage = $lang;
+                $request = $request->withUri($uri->withPath('/'. implode('/', $urlParts)));
+            }
+        }
+        $this->setLocale($selectedLanguage, $request->getAttribute('moduleName'));
+
+        return $handler->handle($request->withAttribute('selectedLanguage', $selectedLanguage));
+    }
+
+    private function setLocale(string $locale, string $domain) : void
+    {
+        $localeFile = 'data/cache/locale/' . $locale . '/LC_MESSAGES/' . $domain . '.mo';
+        if (! file_exists($localeFile)) {
+            return;
+        }
+        $modifiedTime      = filemtime($localeFile);
+        $localeFileRuntime = 'data/cache/locale/' . $locale . '/LC_MESSAGES/' . $domain . '_' . $modifiedTime . '.mo';
+        if (! file_exists($localeFileRuntime)) {
+            $dir = glob('data/cache/locale/' . $locale . '/LC_MESSAGES/' . $domain . '_*.mo');
+            foreach ($dir as $file) {
+                unlink($file);
+            }
+            copy($localeFile, $localeFileRuntime);
+        }
+        $domain .='_' . $modifiedTime;
+        $lang    = $locale . '.UTF8';
+        putenv("LANG={$lang}");
+        putenv("LANGUAGE={$lang}");
+        setlocale(LC_ALL, $lang);
+        Locale::setDefault($locale . '.UTF-8');
+        bindtextdomain($domain, 'data/cache/locale');
+        bind_textdomain_codeset($domain, 'UTF-8');
+        textdomain($domain);
+    }
+}
diff --git a/src/BackendBase/Shared/Middleware/LanguageSelectorMiddlewareFactory.php b/src/BackendBase/Shared/Middleware/LanguageSelectorMiddlewareFactory.php
new file mode 100644
index 0000000..512462b
--- /dev/null
+++ b/src/BackendBase/Shared/Middleware/LanguageSelectorMiddlewareFactory.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace BackendBase\Shared\Middleware;
+
+use BackendBase\Infrastructure\Persistence\Doctrine\Repository\RolesRepository;
+use Interop\Container\ContainerInterface;
+use Laminas\ServiceManager\Factory\FactoryInterface;
+use Psr\Http\Server\MiddlewareInterface;
+
+final class LanguageSelectorMiddlewareFactory implements FactoryInterface
+{
+    public function __invoke(ContainerInterface $container, $requestedName, ?array $options = null) : MiddlewareInterface
+    {
+        return new LanguageSelectorMiddleware($container->get('config'));
+    }
+}