go-cart-actor/pkg/checkout/mutation_payment_completed.go

package checkout

import (
	"fmt"
	"time"

	messages "git.k6n.net/go-cart-actor/proto/checkout"
)

// PaymentCompleted registers the completion of a payment for a checkout.
func HandlePaymentCompleted(g *CheckoutGrain, m *messages.PaymentCompleted) error {
	if m == nil {
		return fmt.Errorf("PaymentCompleted: nil payload")
	}
	paymentId := m.PaymentId
	payment, found := g.FindPayment(paymentId)

	if !found {
		return fmt.Errorf("PaymentCompleted: payment not found")
	}

	payment.ProcessorReference = m.ProcessorReference
	payment.Status = PaymentStatusSuccess
	payment.Amount = m.Amount
	payment.Currency = m.Currency
	payment.CompletedAt = &time.Time{}
	if m.CompletedAt != nil {
		*payment.CompletedAt = m.CompletedAt.AsTime()
	} else {
		*payment.CompletedAt = time.Now()
	}

	// Update checkout status
	g.PaymentInProgress--

	return nil
}