descrybe/apps/api/internal/billing/client_errors.go

package billing

import "errors"

var (
	ErrPlanNameRequired = errors.New("name required")
	ErrPlanNotFound     = errors.New("plan not found")
	ErrAmountRequired   = errors.New("amount required")
	ErrStripeNoCustomer = errors.New("no stripe customer for this company — complete a checkout first")
)

// ClientError reports whether err is a known client-facing billing/Stripe error.
func ClientError(err error) (msg string, ok bool) {
	switch {
	case err == nil:
		return "", false
	case errors.Is(err, ErrPlanNameRequired),
		errors.Is(err, ErrPlanNotFound),
		errors.Is(err, ErrAmountRequired),
		errors.Is(err, ErrStripeNotConfigured),
		errors.Is(err, ErrStripeSelfServeUnavailable),
		errors.Is(err, ErrStripePlanUnsupported),
		errors.Is(err, ErrStripePriceMissing),
		errors.Is(err, ErrStripeNoCustomer),
		errors.Is(err, ErrInsufficientCredits),
		errors.Is(err, ErrProductLimitExceeded),
		errors.Is(err, ErrAIRequiresUpgrade),
		errors.Is(err, ErrEPRELRequiresUpgrade),
		errors.Is(err, ErrUnknownFeatureKey),
		errors.Is(err, ErrUnknownFeatureSection),
		errors.Is(err, ErrInvalidFeatureGates),
		errors.Is(err, ErrFeatureDisabled):
		return err.Error(), true
	default:
		return "", false
	}
}