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// Package confirm provides an interface to ask a user to confirm an action.
// The user is provided with an interface to choose an affirmative or negative
// answer, which is then reflected in the exit code for use in scripting.
//
// If the user selects the affirmative answer, the program exits with 0. If the
// user selects the negative answer, the program exits with 1.
//
// I.e. confirm if the user wants to delete a file
//
// $ gum confirm "Are you sure?" && rm file.txt
package confirm
import (
"fmt"
"time"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
)
type model struct {
prompt string
affirmative string
negative string
quitting bool
hasTimeout bool
timeout time.Duration
confirmation bool
// styles
promptStyle lipgloss.Style
selectedStyle lipgloss.Style
unselectedStyle lipgloss.Style
}
const tickInterval = time.Second
type tickMsg struct{}
func tick() tea.Cmd {
return tea.Tick(tickInterval, func(time.Time) tea.Msg {
return tickMsg{}
})
}
func (m model) Init() tea.Cmd {
if m.timeout > 0 {
return tick()
}
return nil
}
func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
switch msg := msg.(type) {
case tea.WindowSizeMsg:
return m, nil
case tea.KeyMsg:
switch msg.String() {
case "ctrl+c", "esc", "q", "n", "N":
m.confirmation = false
m.quitting = true
return m, tea.Quit
case "left", "h", "ctrl+p", "tab",
"right", "l", "ctrl+n", "shift+tab":
if m.negative == "" {
break
}
m.confirmation = !m.confirmation
case "enter":
m.quitting = true
return m, tea.Quit
case "y", "Y":
m.quitting = true
m.confirmation = true
return m, tea.Quit
}
case tickMsg:
if m.timeout <= 0 {
m.quitting = true
m.confirmation = false
return m, tea.Quit
}
m.timeout -= tickInterval
return m, tick()
}
return m, nil
}
func (m model) View() string {
if m.quitting {
return ""
}
var aff, neg, timeout string
if m.hasTimeout {
timeout = fmt.Sprintf(" (%d)", max(0, int(m.timeout.Seconds())))
}
if m.confirmation {
aff = m.selectedStyle.Render(m.affirmative)
neg = m.unselectedStyle.Render(m.negative + timeout)
} else {
aff = m.unselectedStyle.Render(m.affirmative)
neg = m.selectedStyle.Render(m.negative + timeout)
}
// If the option is intentionally empty, do not show it.
if m.negative == "" {
neg = ""
}
return lipgloss.JoinVertical(lipgloss.Center, m.promptStyle.Render(m.prompt), lipgloss.JoinHorizontal(lipgloss.Left, aff, neg))
}
func max(a, b int) int {
if a > b {
return a
}
return b
}
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