(Feature) User Language System

- Need more lang files translated
- Closes #25

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();
+    }
+}