func toRegex()

in server/datasource/etcd/kv/kv_dao.go [585:609]

• 25 lines of code
• 6 McCabe index (conditional complexity)

func toRegex(opts datasource.FindOptions) (*regexp.Regexp, error) {
	var value string
	if opts.Key == "" {
		return nil, nil
	}
	switch {
	case strings.HasPrefix(opts.Key, "beginWith("):
		value = strings.ReplaceAll(getValue(opts.Key), ".", "\\.") + ".*"
	case strings.HasPrefix(opts.Key, "wildcard("):
		value = strings.ReplaceAll(getValue(opts.Key), ".", "\\.")
		value = strings.ReplaceAll(value, "*", ".*")
	default:
		value = strings.ReplaceAll(opts.Key, ".", "\\.")
	}
	value = "^" + value + "$"
	if !opts.CaseSensitive {
		value = "(?i)" + value
	}
	regex, err := regexp.Compile(value)
	if err != nil {
		openlog.Error("invalid wildcard expr: " + value + ", error: " + err.Error())
		return nil, err
	}
	return regex, nil
}