package vinegarUtil

import (
	"bytes"
	gzip2 "compress/gzip"
	"io/ioutil"
	"os"
)

func GetDiskContent(filePath string) (*[]byte, error) {
	_, ferr := os.Stat(filePath)
	if os.IsNotExist(ferr) {
		return nil, ferr
	} else {
		f, err := os.OpenFile(filePath, os.O_RDONLY, 0755)
		if err != nil {
			return nil, err
		}
		defer f.Close()
		content, err := ioutil.ReadAll(f)

		if err != nil {
			return nil, err
		}
		return &content, nil
	}
}

func GZipBytes(uncompressed *[]byte) (*[]byte, error) {
	buff := bytes.Buffer{}
	gzip := gzip2.NewWriter(&buff)
	_, err := gzip.Write(*uncompressed)
	if err != nil {
		return nil, err
	}
	err = gzip.Flush()
	if err != nil {
		return nil, err
	}
	compressed := buff.Bytes()
	return &compressed, nil
}