aboutsummaryrefslogtreecommitdiffstats
path: root/input/prompt.go
blob: 7a059b1a4d6180062cbf3fd9ba702c1744f83bf6 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
package input

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

func PromptValue(name string, preValue string) (string, error) {
	return promptValue(name, preValue, false)
}

func PromptValueRequired(name string, preValue string) (string, error) {
	return promptValue(name, preValue, true)
}

func promptValue(name string, preValue string, required bool) (string, error) {
	for {
		if preValue != "" {
			fmt.Printf("%s [%s]: ", name, preValue)
		} else {
			fmt.Printf("%s: ", name)
		}

		line, err := bufio.NewReader(os.Stdin).ReadString('\n')
		if err != nil {
			return "", err
		}

		line = strings.TrimSpace(line)

		if preValue != "" && line == "" {
			return preValue, nil
		}

		if required && line == "" {
			fmt.Printf("%s is empty\n", name)
			continue
		}

		return line, nil
	}
}