feat: lang middleware and filament translations

app/Http/Middleware/SetLocale.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class SetLocale
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
+     */
+    public function handle(Request $request, Closure $next): Response
+    {
+        app()->setLocale($this->resolveLocale($request));
+
+        return $next($request);
+    }
+
+    private function resolveLocale(Request $request): string
+    {
+        $supportedLocales = config('app.supported_locales', ['fr', 'en']);
+        $requestedLocale = $request->query('locale') ?: $request->header('X-Locale');
+
+        if (is_string($requestedLocale)) {
+            $normalizedLocale = $this->normalizeLocale($requestedLocale);
+
+            if (in_array($normalizedLocale, $supportedLocales, true)) {
+                return $normalizedLocale;
+            }
+        }
+
+        return $request->getPreferredLanguage($supportedLocales) ?? config('app.locale');
+    }
+
+    private function normalizeLocale(string $locale): string
+    {
+        $locale = strtolower(str_replace('_', '-', $locale));
+
+        return explode('-', $locale)[0];
+    }
+}