Work on registration of existing systems to users

app/Http/Controllers/UserController.php

@@ -5,8 +5,9 @@ namespace App\Http\Controllers;
 use Illuminate\Auth\Events\Registered;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Auth;
+use Illuminate\Support\Facades\Validator;
 
-use App\Models\User;
+use App\Models\{Address,User};
 
 class UserController extends Controller
 {
@@ -63,6 +64,36 @@ class UserController extends Controller
 		return view('user.home');
 	}
 
+	public function link(Request $request)
+	{
+		if ($request->post()) {
+			$request->validate([
+				'address_id'=>'required|exists:addresses,id',
+				'code'=>'required:string',
+			]);
+
+			$ao = Address::findOrFail($request->address_id);
+			if ($ao->check_activation(Auth::user(),$request->code)) {
+				$ao->validated = TRUE;
+				$ao->save();
+
+				$ao->system->users()->save(Auth::user());
+
+				return redirect()->to('/');
+
+			} else {
+				$validator = Validator::make([],[]);
+				$validator->errors()->add(
+					'code', 'Invalid Code!'
+				);
+
+				return back()->withErrors($validator);
+			}
+		}
+
+		return view('user.link');
+	}
+
 	public function register()
 	{
 		return view('user/system/register');