package common

import (
	"image"
	_ "image/jpeg"
	_ "image/png"
	"io"

	"github.com/makiuchi-d/gozxing"
	"github.com/makiuchi-d/gozxing/qrcode"
)

func DecodeQRCode(file io.Reader) (content string, err error) {
	img, _, err := image.Decode(file)
	if err != nil {
		return
	}
	// prepare BinaryBitmap
	bmp, err := gozxing.NewBinaryBitmapFromImage(img)
	if err != nil {
		return
	}
	// decode image
	qrReader := qrcode.NewQRCodeReader()
	result, err := qrReader.Decode(bmp, nil)
	if err != nil {
		return
	}
	return result.String(), nil
}