first commit

common/Core/Middleware/SetAppLocale.php

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+<?php
+
+namespace Common\Core\Middleware;
+
+use Closure;
+use Common\Localizations\Localization;
+use Common\Localizations\UserLocaleController;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Cookie;
+use Negotiation\LanguageNegotiator;
+
+class SetAppLocale
+{
+    public function handle(Request $request, Closure $next)
+    {
+        if (settings('i18n.enable')) {
+            // 1. Check if current user has manually selected a specific language
+            $langCode =
+                $request->get('lang') ??
+                ($request->user()->language ??
+                    Cookie::get(UserLocaleController::COOKIE_NAME));
+
+            $defaultLocale = settings('locale.default', 'auto');
+
+            // 2. if admin manually selected a specific default locale, use that
+            if (!$langCode && $defaultLocale && $defaultLocale !== 'auto') {
+                $langCode = $defaultLocale;
+            }
+
+            // 3. Try to use language based on browser settings
+            if (!$langCode && ($header = $request->header('Accept-Language'))) {
+                $languages = Localization::pluck('language');
+                if ($languages->isNotEmpty()) {
+                    $bestLanguage = (new LanguageNegotiator())->getBest(
+                        $header,
+                        $languages->toArray(),
+                    );
+                    $langCode = $bestLanguage?->getBasePart();
+                }
+            }
+
+            if ($langCode) {
+                app()->setLocale($langCode);
+            }
+        }
+
+        return $next($request);
+    }
+}