package nmap

import "strings"

// ErrMap multi error map
type ErrMap map[string]error

// Error string
func (e ErrMap) Error() string {
	var sb strings.Builder
	for name, err := range e {
		sb.WriteString(name)
		sb.WriteByte(':')
		sb.WriteString(err.Error())
		sb.WriteByte('\n')
	}
	return sb.String()
}

// ErrorOrNil error
func (e ErrMap) ErrorOrNil() error {
	if len(e) == 0 {
		return nil
	}
	return e
}

// IsEmpty error
func (e ErrMap) IsEmpty() bool {
	return len(e) == 0
}

// One error
func (e ErrMap) One() error {
	for _, err := range e {
		return err
	}
	return nil
}