confirm.go RawHistoryFolder

1package confirm
2
3import (
4	"bufio"
5	"errors"
6	"fmt"
7	"io"
8	"strings"
9)
10
11// Confirmer asks a yes/no question on a pair of streams.
12type Confirmer struct {
13	in  io.Reader
14	out io.Writer
15}
16
17// NewConfirmer builds a confirmation prompt. Only y/yes answers confirm; empty,
18// n/no, and unknown answers all decline.
19func NewConfirmer(in io.Reader, out io.Writer) Confirmer {
20	return Confirmer{in: in, out: out}
21}
22
23// Confirm writes question with a [y/N] default and reads one answer line.
24func (c Confirmer) Confirm(question string) (bool, error) {
25	if c.out != nil {
26		if _, err := fmt.Fprintf(c.out, "%s [y/N] ", question); err != nil {
27			return false, err
28		}
29	}
30	answer, err := bufio.NewReader(c.in).ReadString('\n')
31	if err != nil && !errors.Is(err, io.EOF) {
32		return false, err
33	}
34	switch strings.ToLower(strings.TrimSpace(answer)) {
35	case "y", "yes":
36		return true, nil
37	default:
38		return false, nil
39	}
40}