Enable retail outlet by using xendit invoice

Signed-off-by: Imre Nagi <imre.nagi@go-jek.com>

gateway/xendit/alfamart.go

@@ -0,0 +1,24 @@
+package xendit
+
+import (
+	xinvoice "github.com/xendit/xendit-go/invoice"
+)
+
+func NewAlfamartInvoice(rb *InvoiceRequestBuilder) (*AlfamartInvoice, error) {
+	return &AlfamartInvoice{
+		rb: rb,
+	}, nil
+}
+
+type AlfamartInvoice struct {
+	rb *InvoiceRequestBuilder
+}
+
+func (o *AlfamartInvoice) Build() (*xinvoice.CreateParams, error) {
+	o.rb.AddPaymentMethod("ALFAMART")
+	req, err := o.rb.Build()
+	if err != nil {
+		return nil, err
+	}
+	return req, nil
+}

gateway/xendit/facade.go

@@ -39,6 +39,8 @@ func NewInvoiceRequestFromInvoice(inv *invoice.Invoice) (*xinvoice.CreateParams,
 	switch inv.Payment.PaymentType {
 	case payment.SourceOvo:
 		reqBuilder, err = NewOVOInvoice(req)
+	case payment.SourceAlfamart:
+		reqBuilder, err = NewAlfamartInvoice(req)
 	}
 	if err != nil {
 		return nil, err

manage/charger.go

@@ -114,7 +114,8 @@ func (c xenditCharger) Create(ctx context.Context, inv *invoice.Invoice) (*invoi
 			PaymentURL:    xres.CheckoutURL,
 			TransactionID: xres.EWalletTransactionID,
 		}, nil
-	case payment.SourceOvo:
+	case payment.SourceOvo,
+		payment.SourceAlfamart:
 		invoiceRequest, err := factory.NewInvoiceRequestFromInvoice(inv)
 		if err != nil {
 			return nil, err