package langext

import (
	"encoding/base64"
	"strings"
)

// DecodeBase64Any decodes a base64 encoded string
// Works with all variants (std, url, imap), padded and unpadded and even ignores linrebreaks and indents
func DecodeBase64Any(data string) ([]byte, error) {
	data = strings.ReplaceAll(data, "\n", "") // remove linebreaks and indents
	data = strings.ReplaceAll(data, "\t", "") // remove linebreaks and indents
	data = strings.ReplaceAll(data, " ", "")  // remove linebreaks and indents

	data = strings.ReplaceAll(data, ",", "/") // base64_imap --> base64_std

	data = strings.ReplaceAll(data, "_", "/") // base64_url --> base64_std
	data = strings.ReplaceAll(data, "-", "+") // base64_url --> base64_std

	data = strings.ReplaceAll(data, "=", "") // no padding

	return base64.RawStdEncoding.DecodeString(data)
}