package aws

import "encoding/base64"

// Base64Encode encodes data if the input isn't already encoded using base64.StdEncoding.EncodeToString.
// If the input is already base64 encoded, return the original input unchanged.
func base64Encode(data []byte) string {
	// Check whether the data is already Base64 encoded; don't double-encode
	if isBase64Encoded(data) {
		return string(data)
	}
	// data has not been encoded encode and return
	return base64.StdEncoding.EncodeToString(data)
}

func isBase64Encoded(data []byte) bool {
	_, err := base64.StdEncoding.DecodeString(string(data))
	return err == nil
}