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package main
import (	b64 "encoding/base64"	"fmt"	"os"	"io/ioutil"	"github.com/dop251/goja")
func safe_run_file(vm *goja.Runtime, file string) {	data, err := ioutil.ReadFile(file)	if err != nil { panic(err) }	src := string(data)	_, err = vm.RunString(src)	if err != nil { panic(err) }}
func eval_string(vm *goja.Runtime, cmd string) goja.Value {	v, err := vm.RunString(cmd)	if err != nil { panic(err) }	return v}
func write_type(vm *goja.Runtime, t string) {	/* due to some wonkiness with array passing, use base64 */	b64str := eval_string(vm, "XLSX.write(wb, {type:'base64', bookType:'" + t + "'})")	buf, err := b64.StdEncoding.DecodeString(b64str.String());	if err != nil { panic(err) }	err = ioutil.WriteFile("sheetjsg." + t, buf, 0644)	if err != nil { panic(err) }}
func main() {	vm := goja.New()
	/* initialize */	eval_string(vm, "if(typeof global == 'undefined') global = (function(){ return this; }).call(null);")
	/* load library */	safe_run_file(vm, "shim.min.js")	safe_run_file(vm, "xlsx.full.min.js")
	/* get version string */	v := eval_string(vm, "XLSX.version")	fmt.Printf("SheetJS library version %s\n", v)
	/* read file */	data, err := ioutil.ReadFile(os.Args[1])	if err != nil { panic(err) }	vm.Set("buf", data)	fmt.Printf("Loaded file %s\n", os.Args[1])
	/* parse workbook */	eval_string(vm, "var bstr = ''; for(var i = 0; i < buf.length; ++i) bstr += String.fromCharCode(buf[i]);")	eval_string(vm, "wb = XLSX.read(bstr, {type:'binary', cellNF:true});")	eval_string(vm, "ws = wb.Sheets[wb.SheetNames[0]]")
	/* print CSV */	csv := eval_string(vm, "XLSX.utils.sheet_to_csv(ws)")	fmt.Printf("%s\n", csv)
	/* change cell A1 to 3 */	eval_string(vm, "ws['A1'].v = 3; delete ws['A1'].w;")
	/* write file */	//write_type(vm, "xlsb")	//write_type(vm, "xlsx")	write_type(vm, "xls")	write_type(vm, "csv")}