/**
  * Store a newly created resource in storage.
  *
  * @param  Request  $request
  * @return Response
  */
 public function store(Request $request)
 {
     $length = $request->input('length');
     $nb_coupons = $request->input('nb_coupons');
     // setting up characters for coupon code
     for ($i = 0; $i < $nb_coupons; $i++) {
         $coupon = new Coupon();
         $coupon->description = $request->input('description');
         $coupon->discount = $request->input('discount');
         $coupon->code = $this->generate($length);
         $coupon->start_date = $request->input('startdate');
         $coupon->end_date = $request->input('enddate');
         $coupon->save();
     }
     return redirect()->route('coupons.index');
 }