fix: multilingual support

app/Http/Middleware/SetLanguage.php

@@ -0,0 +1,104 @@
+<?php
+/**
+ * NOTICE OF LICENSE.
+ *
+ * UNIT3D Community Edition is open-sourced software licensed under the GNU Affero General Public License v3.0
+ * The details is bundled with this project in the file LICENSE.txt.
+ *
+ * @project    UNIT3D Community Edition
+ *
+ * @author     HDVinnie <hdinnovations@protonmail.com>
+ * @license    https://www.gnu.org/licenses/agpl-3.0.en.html/ GNU Affero General Public License v3.0
+ */
+
+namespace App\Http\Middleware;
+
+use App\Models\Language;
+use Carbon\Carbon;
+use Closure;
+use Illuminate\Support\Facades\App;
+
+class SetLanguage
+{
+    /**
+     * This function checks if language to set is an allowed lang of config.
+     *
+     * @param string $locale
+     **/
+    private function setLocale($locale)
+    {
+        // Check if is allowed and set default locale if not
+        if (! Language::allowed($locale)) {
+            $locale = config('app.locale');
+        }
+
+        // Set app language
+        App::setLocale($locale);
+
+        // Set carbon language
+        if (config('language.carbon')) {
+            // Carbon uses only language code
+            if (config('language.mode.code') == 'long') {
+                $locale = explode('-', $locale)[0];
+            }
+
+            Carbon::setLocale($locale);
+        }
+
+        // Set date language
+        if (config('language.date')) {
+            // Date uses only language code
+            if (config('language.mode.code') == 'long') {
+                $locale = explode('-', $locale)[0];
+            }
+
+            \Date::setLocale($locale);
+        }
+    }
+
+    public function setDefaultLocale()
+    {
+        $this->setLocale(config('app.locale'));
+    }
+
+    public function setUserLocale()
+    {
+        $user = auth()->user();
+
+        if ($user->locale) {
+            $this->setLocale($user->locale);
+        } else {
+            $this->setDefaultLocale();
+        }
+    }
+
+    public function setSystemLocale($request)
+    {
+        if ($request->session()->has('locale')) {
+            $this->setLocale(session('locale'));
+        } else {
+            $this->setDefaultLocale();
+        }
+    }
+
+    /**
+     * Handle an incoming request.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @param \Closure                 $next
+     *
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        if ($request->has('lang')) {
+            $this->setLocale($request->get('lang'));
+        } elseif (auth()->check()) {
+            $this->setUserLocale();
+        } else {
+            $this->setSystemLocale($request);
+        }
+
+        return $next($request);
+    }
+}

routes/web.php

@@ -22,6 +22,7 @@
 |
 */
 
+Route::group(['middleware' => 'language'], function () {
     /*
     |---------------------------------------------------------------------------------
     | Website (Not Authorized) (Alpha Ordered)
@@ -875,3 +876,4 @@
             });
         });
     });
+});