(Feature) User Language System

- Need more lang files translated
- Closes #25

app/Helpers/Language.php

@@ -0,0 +1,23 @@
+<?php
+/**
+ * NOTICE OF LICENSE
+ *
+ * UNIT3D is open-sourced software licensed under the GNU General Public License v3.0
+ * The details is bundled with this project in the file LICENSE.txt.
+ *
+ * @project    UNIT3D
+ * @license    https://choosealicense.com/licenses/gpl-3.0/  GNU General Public License v3.0
+ * @author     HDVinnie
+ */
+
+if (!function_exists('language')) {
+    /**
+     * Get the language instance.
+     *
+     * @return App\Language
+     */
+    function language()
+    {
+        return app('language');
+    }
+}

app/Http/Controllers/LanguageController.php

@@ -0,0 +1,72 @@
+<?php
+/**
+ * NOTICE OF LICENSE
+ *
+ * UNIT3D is open-sourced software licensed under the GNU General Public License v3.0
+ * The details is bundled with this project in the file LICENSE.txt.
+ *
+ * @project    UNIT3D
+ * @license    https://choosealicense.com/licenses/gpl-3.0/  GNU General Public License v3.0
+ * @author     HDVinnie
+ */
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+
+use Auth;
+
+use App\Language;
+
+class LanguageController extends Controller
+{
+    /**
+     * Set locale if it's allowed.
+     *
+     * @param string $locale
+     * @param \Illuminate\Http\Request $request
+     **/
+    private function setLocale($locale, $request)
+    {
+        // Check if is allowed and set default locale if not
+        if (!Language::allowed($locale)) {
+            $locale = config('app.locale');
+        }
+
+        if (Auth::check()) {
+            Auth::user()->setAttribute('locale', $locale)->save();
+        } else {
+            $request->session()->put('locale', $locale);
+        }
+    }
+
+    /**
+     * Set locale and return home url.
+     *
+     * @param string $locale
+     * @param \Illuminate\Http\Request $request
+     *
+     * @return string
+     **/
+    public function home($locale, Request $request)
+    {
+        $this->setLocale($locale, $request);
+
+        return redirect(url('/'));
+    }
+
+    /**
+     * Set locale and return back.
+     *
+     * @param string $locale
+     * @param \Illuminate\Http\Request $request
+     *
+     * @return string
+     **/
+    public function back($locale, Request $request)
+    {
+        $this->setLocale($locale, $request);
+
+        return redirect()->back();
+    }
+}

app/Http/Kernel.php

@@ -82,5 +82,6 @@ class Kernel extends HttpKernel
         'lock' => \App\Http\Middleware\LockAccount::class,
         'immune' => \App\Http\Middleware\CheckForImmunity::class,
         'check_ip' => \App\Http\Middleware\CheckIfAlreadyVoted::class,
+        'language' => \App\Http\Middleware\SetLanguage::class,
     ];
 }

app/Http/Middleware/SetLanguage.php

@@ -0,0 +1,104 @@
+<?php
+/**
+ * NOTICE OF LICENSE
+ *
+ * UNIT3D is open-sourced software licensed under the GNU General Public License v3.0
+ * The details is bundled with this project in the file LICENSE.txt.
+ *
+ * @project    UNIT3D
+ * @license    https://choosealicense.com/licenses/gpl-3.0/  GNU General Public License v3.0
+ * @author     HDVinnie
+ */
+
+namespace App\Http\Middleware;
+
+use App;
+use Auth;
+use Closure;
+
+use App\Language;
+
+use Carbon\Carbon;
+
+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 (Auth::check()) {
+            $this->setUserLocale();
+        } else {
+            $this->setSystemLocale($request);
+        }
+
+        return $next($request);
+    }
+}