first commit

Xboard/app/Http/Controllers/V1/User/CouponController.php

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+<?php
+
+namespace App\Http\Controllers\V1\User;
+
+use App\Exceptions\ApiException;
+use App\Http\Controllers\Controller;
+use App\Http\Resources\CouponResource;
+use App\Services\CouponService;
+use Illuminate\Http\Request;
+
+class CouponController extends Controller
+{
+    public function check(Request $request)
+    {
+        if (empty($request->input('code'))) {
+            return $this->fail([422, __('Coupon cannot be empty')]);
+        }
+        $couponService = new CouponService($request->input('code'));
+        $couponService->setPlanId($request->input('plan_id'));
+        $couponService->setUserId($request->user()->id);
+        $couponService->setPeriod($request->input('period'));
+        $couponService->check();
+        return $this->success(CouponResource::make($couponService->getCoupon()));
+    }
+}