Use zero Numeric for export instead of hardcoding 0,00

postgres/ynab-import.go

@@ -303,27 +303,38 @@ func trimLastChar(s string) string {
 	return s[:len(s)-size]
 }
 
-func GetAmount(inflow string, outflow string) (Numeric, error) {
+func ParseNumeric(text string) (Numeric, error) {
 	// Remove trailing currency
-	inflow = strings.Replace(trimLastChar(inflow), ",", ".", 1)
-	outflow = strings.Replace(trimLastChar(outflow), ",", ".", 1)
+	text = trimLastChar(text)
+
+	// Unify decimal separator
+	text = strings.Replace(text, ",", ".", 1)
 
 	num := Numeric{}
-	err := num.Set(inflow)
+	err := num.Set(text)
 	if err != nil {
-		return num, fmt.Errorf("parse inflow %s: %w", inflow, err)
+		return num, fmt.Errorf("parse numeric %s: %w", text, err)
+	}
+
+	return num, nil
+}
+
+func GetAmount(inflow string, outflow string) (Numeric, error) {
+	in, err := ParseNumeric(inflow)
+	if err != nil {
+		return in, err
+	}
+
+	if !in.IsZero() {
+		return in, nil
 	}
 
 	// if inflow is zero, use outflow
-	if num.Int.Int64() != 0 {
-		return num, nil
-	}
-
-	err = num.Set("-" + outflow)
+	out, err := ParseNumeric("-" + outflow)
 	if err != nil {
-		return num, fmt.Errorf("parse outflow %s: %w", inflow, err)
+		return out, err
 	}
-	return num, nil
+	return out, nil
 }
 
 func (ynab *YNABImport) GetAccount(context context.Context, name string) (*Account, error) {