golang parse xml

package main

import (
	"fmt"
	"os"
	"flag"
	"encoding/xml"
)

type Offer struct {
	Name string `xml:"name"`
}


var inputFile = flag.String("infile", "", "Input file path")

func main() {
	flag.Parse()

	if (*inputFile == "") {
		fmt.Fprintln(os.Stderr, "Error: missing input file.")
		return		
	}

	xmlFile, err := os.Open(*inputFile)
	if err != nil {
		fmt.Println("Error opening file:", err)
		return
	}
	defer xmlFile.Close()

	decoder := xml.NewDecoder(xmlFile)
	total := 0
	var tagName string
	for {
		token, _ := decoder.Token()
		if token == nil {
			break
		}

		switch element := token.(type) {
			case xml.StartElement:
				tagName = element.Name.Local
				if tagName == "offer" {
					total++
					var offer Offer
					decoder.DecodeElement(&offer, &element)
					// fmt.Println(offer.Name)
				}
			default:
		}
		
	}

	fmt.Printf("Total: %d \n", total)
}