mirror of
https://github.com/charmbracelet/gum
synced 2024-06-28 10:10:10 +02:00
129 lines
2.6 KiB
Go
129 lines
2.6 KiB
Go
// Package confirm provides an interface to ask a user to confirm an action.
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// The user is provided with an interface to choose an affirmative or negative
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// answer, which is then reflected in the exit code for use in scripting.
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//
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// If the user selects the affirmative answer, the program exits with 0. If the
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// user selects the negative answer, the program exits with 1.
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//
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// I.e. confirm if the user wants to delete a file
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//
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// $ gum confirm "Are you sure?" && rm file.txt
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package confirm
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import (
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"fmt"
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"time"
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tea "github.com/charmbracelet/bubbletea"
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"github.com/charmbracelet/lipgloss"
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)
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type model struct {
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prompt string
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affirmative string
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negative string
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quitting bool
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aborted bool
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hasTimeout bool
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timeout time.Duration
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confirmation bool
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// styles
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promptStyle lipgloss.Style
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selectedStyle lipgloss.Style
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unselectedStyle lipgloss.Style
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}
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const tickInterval = time.Second
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type tickMsg struct{}
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func tick() tea.Cmd {
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return tea.Tick(tickInterval, func(time.Time) tea.Msg {
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return tickMsg{}
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})
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}
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func (m model) Init() tea.Cmd {
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if m.timeout > 0 {
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return tick()
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}
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return nil
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}
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func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
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switch msg := msg.(type) {
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case tea.WindowSizeMsg:
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return m, nil
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case tea.KeyMsg:
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switch msg.String() {
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case "ctrl+c", "esc":
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m.confirmation = false
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m.aborted = true
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m.quitting = true
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return m, tea.Quit
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case "q", "n", "N":
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m.confirmation = false
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m.quitting = true
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return m, tea.Quit
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case "left", "h", "ctrl+p", "tab",
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"right", "l", "ctrl+n", "shift+tab":
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if m.negative == "" {
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break
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}
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m.confirmation = !m.confirmation
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case "enter":
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m.quitting = true
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return m, tea.Quit
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case "y", "Y":
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m.quitting = true
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m.confirmation = true
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return m, tea.Quit
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}
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case tickMsg:
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if m.timeout <= 0 {
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m.quitting = true
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m.confirmation = false
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return m, tea.Quit
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}
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m.timeout -= tickInterval
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return m, tick()
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}
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return m, nil
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}
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func (m model) View() string {
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if m.quitting {
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return ""
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}
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var aff, neg, timeout string
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if m.hasTimeout {
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timeout = fmt.Sprintf(" (%d)", max(0, int(m.timeout.Seconds())))
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}
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if m.confirmation {
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aff = m.selectedStyle.Render(m.affirmative)
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neg = m.unselectedStyle.Render(m.negative + timeout)
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} else {
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aff = m.unselectedStyle.Render(m.affirmative)
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neg = m.selectedStyle.Render(m.negative + timeout)
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}
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// If the option is intentionally empty, do not show it.
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if m.negative == "" {
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neg = ""
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}
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return lipgloss.JoinVertical(lipgloss.Center, m.promptStyle.Render(m.prompt), lipgloss.JoinHorizontal(lipgloss.Left, aff, neg))
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}
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func max(a, b int) int {
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if a > b {
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return a
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}
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return b
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}
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