thermal-print.go

package main

import (
	"bufio"
	"os"

	// "github.com/hennedo/escpos"
	"github.com/seer-robotics/escpos"
)

type Item struct {
	Name  string
	Qty   string
	Total string
}

var items = []Item{
	{
		Name:  "ayam goreng",
		Qty:   "11",
		Total: "1.000.000",
	},
	{
		Name:  "bebek goreng panjang",
		Qty:   "1",
		Total: "900.000",
	},
	{
		Name:  "Indomie Goreng",
		Qty:   "99",
		Total: "10.000",
	},
}

func main() {
	socket, err := os.OpenFile("/dev/rfcomm0", os.O_RDWR, 0)
	if err != nil {
		println(err.Error())
	}
	defer socket.Close()

	w := bufio.NewWriter(socket)
	p := escpos.New(w)

	// all
	p.SetFontSize(1, 1)
	p.SetEmphasize(1)

	// header
	p.SetAlign("center")
	p.Write("ALFAMART NUSANTARA")
	p.Linefeed()
	p.Write("083840745543")
	p.Linefeed()
	p.Linefeed()
	p.Write("CV. MAKMUR JAYA SEJAHTRA")
	p.Linefeed()
	p.Write("JL.MT HARYANTO NO.168  RT00/RW10")
	p.Linefeed()
	p.Write("NPWP: 74.927.667.1-522.0000")
	p.Linefeed()
	p.Write("================================")
	p.Linefeed()
	p.Write("Kasir: Budiman")
	p.SetMoveX(200)
	p.Write("Order#31398nsd")
	p.Linefeed()
	p.Write("================================")

	p.Linefeed()
	p.SetAlign("left")
	for _, v := range items {
		p.Write(v.Name)

		if len(v.Qty) >= 2 {
			p.SetMoveX(240)
			p.Write(v.Qty)
		} else {
			p.SetMoveX(250)
			p.Write(v.Qty)
		}
		if len(v.Total) > 7 {
			p.SetMoveX(275)
			p.Write(v.Total)
		} else if len(v.Total) > 6 {
			p.SetMoveX(300)
			p.Write(v.Total)
		} else {
			p.SetMoveX(310)
			p.Write(v.Total)
		}
		p.Linefeed()
	}

	p.Write("-------------------------------")
	p.Linefeed()

	p.Write("Total Item")
	p.SetMoveX(240)
	p.Write("10")
	p.SetMoveX(300)
	p.Write("999.999")

	p.Linefeed()
	p.Write("Tunai")
	p.SetMoveX(310)
	p.Write("99.999")

	p.Linefeed()
	p.Write("Kembali")
	p.SetMoveX(300)
	p.Write("100.999")

	p.Linefeed()
	p.Write("PPN ( 100.000)")

	p.Linefeed()
	p.Linefeed()

	p.SetAlign("center")
	p.Write("Terima kasih sudah berbelanja")
	p.Linefeed()
	p.Write("Kritik&Saran: 15000959")
	p.Linefeed()
	p.Write("SMS/WA: 083840745543")
	p.Linefeed()
	p.Linefeed()
	p.FormfeedD(20)

	w.Flush()
}