Allow user to register using code in laravel - laravel

Question

please I am trying to allow users to register with a coupon code, if coupon code is invalid dont register user, but when I tried it users are been registered even though the code is already used or invalid
I am using this package for the code https://github.com/michael-rubel/laravel-couponables
public function store(Request $request)
{
$request->validate([
'name' => ['required', 'string', 'max:255'],
'username' => ['required', 'string', 'max:255', 'unique:users'],
'email' => ['required', 'string', 'email', 'max:255', 'unique:users'],
'password' => ['required', 'confirmed', Rules\Password::defaults()],
]);
$user = User::create([
'username' => $request->username,
'name' => $request->name,
'email' => $request->email,
'password' => Hash::make($request->password),
]);
$user->redeemCoupon($request->code);
event(new Registered($user));
Auth::login($user);
return redirect(RouteServiceProvider::HOME);
}

Answer 1

You are already registering the user before checking if the coupon is valid. Move this line after the validation.
$user->redeemCouponOr($request->code, function ($e) {
//handle the different exceptions here if not valid.
});
$user = User::create([
'username' => $request->username,
'name' => $request->name,
'email' => $request->email,
'password' => Hash::make($request->password),
]);
Or handle the validations inside the validator method
$request->validate([
...
'code' =>'sometimes|exists:coupon_table,coupon_code_column,coupon_status_column,!used_or_some_other_status'
]);

Answer 2

Make a custom validation rule to verify code and check if the code is already used.
$redeemer->verifyCoupon($code);
$redeemer->isCouponAlreadyUsed($code);

Answer 3

I don't see anything that is not explained in the Laravel Couponables package that you are using it clearly has explanations on the GitHub:
Listeners
If you go event-driven, you can handle package events:
CouponVerified
CouponRedeemed
CouponExpired
CouponIsOverLimit
CouponIsOverQuantity
NotAllowedToRedeem
FailedToRedeemCoupon
All the exceptions are well explained in the documentation
If something's going wrong, methods verifyCoupon and redeemCoupon will throw an exception:
CouponExpiredException // Coupon is expired (`expires_at` column).
InvalidCouponException // Coupon is not found in the database.
NotAllowedToRedeemException // Coupon is assigned to the specific model (`redeemer` morphs).
OverLimitException // Coupon is over the limit for the specific model (`limit` column).
OverQuantityException // Coupon is exhausted (`quantity` column).
CouponException
You can simply replace this line from your code:
$user->redeemCoupon($request->code);
To this:
$user->redeemCouponOr($request->code, function ($exception) {
// Your action with $exception!
print('This coupon is no longer valid'); //
});