added route for taking preauthorization payment

handlers/handlers.go

@@ -22,7 +22,8 @@ import (
 
 const (
 	customLayout            = "2006-01-02 15:04:05 -0700"
-	transactionUrl = "http://127.0.0.1:18181/start-transaction/"
+	takePreauthorizationUrl = "http://127.0.0.1:18181/start-transaction/"
+	takePaymentUrl          = "http://127.0.0.1:18181/start-and-confirm-transaction/"
 )
 
 type App struct {
@@ -42,11 +43,12 @@ func NewApp(dispPort *serial.Port, lockType, encoderAddress string, isPayment bo
 func (app *App) RegisterRoutes(mux *http.ServeMux) {
 	mux.HandleFunc("/issuedoorcard", app.issueDoorCard)
 	mux.HandleFunc("/printroomticket", app.printRoomTicket)
-	mux.HandleFunc("/starttransaction", app.startTransaction)
+	mux.HandleFunc("/takepreauth", app.takePreauthorization)
+	mux.HandleFunc("/takepayment", app.takePayment)
 }
 
-func (app *App) startTransaction(w http.ResponseWriter, r *http.Request) {
+func (app *App) takePreauthorization(w http.ResponseWriter, r *http.Request) {
-	const op = logging.Op("startTransaction")
+	const op = logging.Op("takePreauthorization")
 	var (
 		theResponse       cmstypes.ResponseRec
 		cardholderReceipt string
@@ -73,7 +75,7 @@ func (app *App) startTransaction(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	log.Println("startTransaction called")
+	log.Println("takePreauthorization called")
 	if r.Method != http.MethodPost {
 		theResponse.Data = payment.BuildFailureURL(payment.ResultError, "Method not allowed; use POST")
 		writeTransactionResult(w, http.StatusMethodNotAllowed, theResponse)
@@ -95,10 +97,10 @@ func (app *App) startTransaction(w http.ResponseWriter, r *http.Request) {
 		writeTransactionResult(w, http.StatusBadRequest, theResponse)
 		return
 	}
-	log.Printf("Start trnasaction payload: Amount=%s, Type=%s", theRequest.AmountMinorUnits, theRequest.TransactionType)
+	log.Printf("Transaction payload: Amount=%s, Type=%s", theRequest.AmountMinorUnits, theRequest.TransactionType)
 
 	client := &http.Client{Timeout: 300 * time.Second}
-	response, err := client.Post(transactionUrl, "text/xml", bytes.NewBuffer(body))
+	response, err := client.Post(takePreauthorizationUrl, "text/xml", bytes.NewBuffer(body))
 	if err != nil {
 		logging.Error(serviceName, err.Error(), "Payment processing error", string(op), "", "", 0)
 		theResponse.Data = payment.BuildFailureURL(payment.ResultError, "No response from payment processor")
@@ -140,7 +142,106 @@ func (app *App) startTransaction(w http.ResponseWriter, r *http.Request) {
 		log.Errorf("PrintCardholderReceipt error: %v", err)
 	}
 
-	theResponse.Data = payment.BuildRedirectURL(result)
+	theResponse.Data = payment.BuildPreauthRedirectURL(result)
+	writeTransactionResult(w, http.StatusOK, theResponse)
+}
+
+func (app *App) takePayment(w http.ResponseWriter, r *http.Request) {
+	const op = logging.Op("takePayment")
+	var (
+		theResponse       cmstypes.ResponseRec
+		cardholderReceipt string
+		theRequest        cmstypes.TransactionRec
+		trResult          payment.TransactionResultXML
+	)
+
+	theResponse.Status.Code = http.StatusInternalServerError
+	theResponse.Status.Message = "500 Internal server error"
+
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS")
+	w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
+	w.Header().Set("Content-Type", "application/json")
+
+	if !app.isPayment {
+		theResponse.Data = payment.BuildFailureURL(payment.ResultError, "Payment processing is disabled")
+		writeTransactionResult(w, http.StatusServiceUnavailable, theResponse)
+		return
+	}
+
+	if r.Method == http.MethodOptions {
+		w.WriteHeader(http.StatusNoContent)
+		return
+	}
+
+	log.Println("takePayment called")
+	if r.Method != http.MethodPost {
+		theResponse.Data = payment.BuildFailureURL(payment.ResultError, "Method not allowed; use POST")
+		writeTransactionResult(w, http.StatusMethodNotAllowed, theResponse)
+		return
+	}
+	defer r.Body.Close()
+
+	if ct := r.Header.Get("Content-Type"); ct != "text/xml" {
+		theResponse.Data = payment.BuildFailureURL(payment.ResultError, "Content-Type must be text/xml")
+		writeTransactionResult(w, http.StatusUnsupportedMediaType, theResponse)
+		return
+	}
+
+	body, _ := io.ReadAll(r.Body)
+	err := xml.Unmarshal(body, &theRequest)
+	if err != nil {
+		logging.Error(serviceName, err.Error(), "ReadXML", string(op), "", "", 0)
+		theResponse.Data = payment.BuildFailureURL(payment.ResultError, "Invalid XML payload")
+		writeTransactionResult(w, http.StatusBadRequest, theResponse)
+		return
+	}
+	log.Printf("Transaction payload: Amount=%s, Type=%s", theRequest.AmountMinorUnits, theRequest.TransactionType)
+
+	client := &http.Client{Timeout: 300 * time.Second}
+	response, err := client.Post(takePaymentUrl, "text/xml", bytes.NewBuffer(body))
+	if err != nil {
+		logging.Error(serviceName, err.Error(), "Payment processing error", string(op), "", "", 0)
+		theResponse.Data = payment.BuildFailureURL(payment.ResultError, "No response from payment processor")
+		writeTransactionResult(w, http.StatusBadGateway, theResponse)
+		return
+	}
+	defer response.Body.Close()
+
+	body, err = io.ReadAll(response.Body)
+	if err != nil {
+		logging.Error(serviceName, err.Error(), "Read response body error", string(op), "", "", 0)
+		theResponse.Data = payment.BuildFailureURL(payment.ResultError, "Failed to read response body")
+		writeTransactionResult(w, http.StatusInternalServerError, theResponse)
+		return
+	}
+
+	if err := trResult.ParseTransactionResult(body); err != nil {
+		logging.Error(serviceName, err.Error(), "Parse transaction result error", string(op), "", "", 0)
+	}
+
+	// Compose JSON from responseEntries
+	result := make(map[string]string)
+	for _, e := range trResult.Entries {
+		switch e.Key {
+		case payment.ReceiptData, payment.ReceiptDataMerchant:
+			// ignore these
+		case payment.ReceiptDataCardholder:
+			cardholderReceipt = e.Value
+		case payment.TransactionResult:
+			theResponse.Status.Message = e.Value
+			theResponse.Status.Code = http.StatusOK
+			result[e.Key] = e.Value
+		default:
+			result[e.Key] = e.Value
+		}
+	}
+
+	if err := printer.PrintCardholderReceipt(cardholderReceipt); err != nil {
+		log.Errorf("PrintCardholderReceipt error: %v", err)
+	}
+
+	theResponse.Data = payment.BuildPaymentRedirectURL(result)
 	writeTransactionResult(w, http.StatusOK, theResponse)
 }
 

main.go

@@ -23,7 +23,7 @@ import (
 )
 
 const (
-	buildVersion = "1.0.25"
+	buildVersion = "1.0.26"
 	serviceName  = "hardlink"
 )
 

payment/creditcall.go

@@ -250,7 +250,31 @@ func nullableFloatArg(nf sql.NullFloat64) interface{} {
 }
 
 // BuildRedirectURL builds the redirect URL to send the guest to after payment.
-func BuildRedirectURL(result map[string]string) string {
+func BuildPaymentRedirectURL(result map[string]string) string {
+	res := result[TransactionResult]
+
+	// Transaction approved?
+	if strings.EqualFold(res, ResultApproved) {
+		// Transaction confirmed?
+		if strings.EqualFold(result[ConfirmResult], ResultApproved) {
+			log.WithField(LogResult, result[ConfirmResult]).
+				Info("Transaction approved and confirmed")
+
+			return buildSuccessURL(result)
+		}
+
+		// Not confirmed
+		log.WithFields(log.Fields{LogFieldError: result[ConfirmResult], LogFieldDescription: result[ConfirmErrors]}).
+			Error("Transaction approved but not confirmed")
+
+		return BuildFailureURL(result[ConfirmResult], result[ConfirmErrors])
+	}
+
+	// Not approved
+	return BuildFailureURL(res, result[Errors])
+}
+
+func BuildPreauthRedirectURL(result map[string]string) string {
 	res := result[TransactionResult]
 	tType := result[TransactionType]
 
@@ -267,19 +291,11 @@ func BuildRedirectURL(result map[string]string) string {
 		// Transaction type Sale?
 		case strings.EqualFold(tType, SaleTransactionType):
 			// Transaction confirmed?
-			if strings.EqualFold(result[ConfirmResult], ResultApproved) {
 			log.WithField(LogResult, result[ConfirmResult]).
-					Info("Transaction approved and confirmed")
+				Info("Amount preauthorized successfully")
 
 			return buildSuccessURL(result)
 		}
-
-			// Not confirmed
-			log.WithFields(log.Fields{LogFieldError: result[ConfirmResult], LogFieldDescription: result[ConfirmErrors]}).
-				Error("Transaction approved but not confirmed")
-
-			return BuildFailureURL(result[ConfirmResult], result[ConfirmErrors])
-		}
 	}
 
 	// Not approved

release notes.md

@@ -2,6 +2,9 @@
 
 builtVersion is a const in main.go
 
+#### 1.0.26 - 10 December 2025
+added route for taking preauthorization payment
+
 #### 1.0.25 - 08 December 2025
 return masked card number and expiry date in the payment success URL