func()

in app.go [215:251]

• 31 lines of code
• 8 McCabe index (conditional complexity)

func (app *App) mfaDevice() (string, error) {
	devices, err := app.aws.MFADevices()
	if err != nil {
		return "", err
	}
	if len(devices) < 1 {
		return "", errors.New("no MFA devices found")
	}
	if len(devices) == 1 {
		return devices[0], nil
	}

Prompt:
	for i, device := range devices {
		fmt.Fprintf(app.stderr, "[%d]: %s\n", i+1, device)
	}

	app.stderr.Write([]byte("Select MFA device: "))

	userInput, err := readInput(app.stdinReader)
	if err != nil {
		return "", fmt.Errorf("unable to read MFA device option from stdin: %v", err)
	}

	userInputInt, err := strconv.Atoi(userInput)
	if err != nil {
		app.stderr.Write([]byte("Invalid input (not a number)\n"))
		goto Prompt
	}

	if userInputInt < 1 || userInputInt > len(devices) {
		app.stderr.Write([]byte("Invalid input (not in range)\n"))
		goto Prompt
	}

	return devices[userInputInt-1], nil
}