package guutil

import (
	"bytes"
	"compress/gzip"
	"io/ioutil"
	"log"
)

func GzipCompress(source []byte) []byte {
	var buf bytes.Buffer

	gw := gzip.NewWriter(&buf)

	if _, err := gw.Write(source); err != nil {
		log.Println(err)
		return nil
	}
	if err := gw.Flush(); err != nil {
		log.Println(err)
		return nil
	}
	if err := gw.Close(); err != nil {
		log.Println(err)
		return nil
	}

	return buf.Bytes()
}

func GzipUncompress(source []byte) []byte {
	gr, err := gzip.NewReader(bytes.NewReader(source))
	if err != nil {
		log.Println(err)
		return nil
	}

	data, err := ioutil.ReadAll(gr)
	if err != nil {
		log.Println(err)
		return nil
	}

	return data
}