Refactor and reorganization

README-HR.md

@@ -126,13 +126,6 @@ func main() {
         "G",           // payment method G - cash, K - credit card, T -
                        // transfer, O - other, C - check (deprecated)
         "12345678901", // operator OIB
-        false,         // late delivery, if previous attempt failed but the
-                       // invoice was issued with just ZKI
-        "",            // receipt book number, if the invoicing system was
-                       // unusable and the invoice was issued manually, the
-                       // number of the receipt book
-        "",            // unused, reserved field for future or temporary
-                       // unexpected use by the CIS, should be empty
     )
 
     if err != nil {
@@ -151,14 +144,14 @@ func main() {
     // serial of the certificate used to generate it for future reference. You
     // can get the cert serial with fiskalEntity.GetCertSERIAL().
 
-    // Display the invoice
+    // Display the invoice for test
     fmt.Println(invoice)
 
     // NOW we should have a saved invoice with a valid ZKI and we are ready to
     // send the invoice to the CIS
 
     // Send test invoice to CIS with InvoiceRequest
-    jir, zkiR, err := fiskalEntity.InvoiceRequest(invoice)
+    jir, zkiR, err := invoice.InvoiceRequest()
 
     if err != nil {
         log.Fatalf("Failed to send invoice: %v", err)

README.md

@@ -125,13 +125,6 @@ func main() {
         "G",           // payment method G - cash, K - credit card, T -
                        // transfer, O - other, C - check (deprecated)
         "12345678901", // operator OIB
-        false,         // late delivery, if previous attempt failed but the
-                       // invoice was issued with just ZKI
-        "",            // receipt book number, if the invoicing system was
-                       // unusable and the invoice was issued manually, the
-                       // number of the receipt book
-        "",            // unused, reserved field for future or temporary
-                       // unexpected use by the CIS, should be empty
     )
 
     if err != nil {
@@ -150,14 +143,14 @@ func main() {
     // serial of the certificate used to generate it for future reference. You
     // can get the cert serial with fiskalEntity.GetCertSERIAL().
 
-    // Display the invoice
+    // Display the invoice for test
     fmt.Println(invoice)
 
     // NOW we should have a saved invoice with a valid ZKI and we are ready to
     // send the invoice to the CIS
 
     // Send test invoice to CIS with InvoiceRequest
-    jir, zkiR, err := fiskalEntity.InvoiceRequest(invoice)
+    jir, zkiR, err := invoice.InvoiceRequest()
 
     if err != nil {
         log.Fatalf("Failed to send invoice: %v", err)

basicvalidators.go

@@ -17,6 +17,15 @@ func IsValidCurrencyFormat(amount string) bool {
 	return validCurrency.MatchString(amount)
 }
 
+// IsValidTaxRate checks if the given string is a valid non-negative tax rate with exactly two decimal places.
+// Allows positive values and 0.00, but not negative values.
+func IsValidTaxRate(rate string) bool {
+	// Regex pattern to match a positive or zero decimal number with exactly two decimal places
+	// Matches values like "0.00", "25.00", "5.00", etc.
+	validTaxRate := regexp.MustCompile(`^([0-9]+)(\.[0-9]{2})$`)
+	return validTaxRate.MatchString(rate)
+}
+
 // ValidateOIB checks if an OIB is valid using the Mod 11, 10 algorithm
 func ValidateOIB(oib string) bool {
 	if len(oib) != 11 {
@@ -86,3 +95,19 @@ func IsFileReadable(filePath string) bool {
 
 	return true
 }
+
+// ValidateJIR checks if the given JIR is a valid UUID format (e.g., "9d6f5bb6-da48-4fcd-a803-4586a025e0e4").
+// Returns true if valid, otherwise false.
+func ValidateJIR(jir string) bool {
+	// Regular expression to match UUID format (e.g., "9d6f5bb6-da48-4fcd-a803-4586a025e0e4")
+	var jirRegex = regexp.MustCompile(`^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$`)
+	return jirRegex.MatchString(jir)
+}
+
+// ValidateZKI checks if the given ZKI is a valid MD5 hash in hexadecimal format (32 characters).
+// Returns true if valid, otherwise false.
+func ValidateZKI(zki string) bool {
+	// Regular expression to match a 32-character hexadecimal MD5 hash
+	var zkiRegex = regexp.MustCompile(`^[0-9a-f]{32}$`)
+	return zkiRegex.MatchString(zki)
+}

dsignandverify.go

@@ -11,16 +11,10 @@ import (
 	"crypto/x509"
 	"encoding/base64"
 	"fmt"
-	"time"
 
 	"github.com/beevik/etree"
 )
 
-// generateUniqueID generates a unique ID
-func generateUniqueID() string {
-	return fmt.Sprintf("%x", time.Now().UnixNano())
-}
-
 // doc14n applies Exclusive Canonical XML (http://www.w3.org/2001/10/xml-exc-c14n#) to the input XML data
 func doc14n(xmlData []byte) ([]byte, error) {
 	// Parse the input XML string into an etree.Document