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main.go
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main.go
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package main
import (
"fmt"
"log"
"github.com/charmbracelet/bubbles/textinput"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
)
func main() {
p := tea.NewProgram(initialModel())
if err := p.Start(); err != nil {
log.Fatal(err)
}
}
type tickMsg struct{}
type errMsg error
const (
ccn = iota
exp
cvv
)
const (
hotPink = lipgloss.Color("#FF06B7")
darkGray = lipgloss.Color("#767676")
)
var (
inputStyle = lipgloss.NewStyle().Foreground(hotPink)
continueStyle = lipgloss.NewStyle().Foreground(darkGray)
)
type model struct {
inputs []textinput.Model
focused int
err error
}
func initialModel() model {
var inputs []textinput.Model = make([]textinput.Model, 3)
inputs[ccn] = textinput.New()
inputs[ccn].Placeholder = "4505 **** **** 1234"
inputs[ccn].Focus()
inputs[ccn].CharLimit = 20
inputs[ccn].Width = 30
inputs[ccn].Prompt = ""
inputs[exp] = textinput.New()
inputs[exp].Placeholder = "MM/YY "
inputs[exp].CharLimit = 5
inputs[exp].Width = 5
inputs[exp].Prompt = ""
inputs[cvv] = textinput.New()
inputs[cvv].Placeholder = "XXX"
inputs[cvv].CharLimit = 3
inputs[cvv].Width = 5
inputs[cvv].Prompt = ""
return model{
inputs: inputs,
focused: 0,
err: nil,
}
}
func (m model) Init() tea.Cmd {
return textinput.Blink
}
func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
var (
cmds []tea.Cmd = make([]tea.Cmd, len(m.inputs))
)
switch msg := msg.(type) {
case tea.KeyMsg:
switch msg.Type {
case tea.KeyEnter:
if m.focused == len(m.inputs)-1 {
return m, tea.Quit
} else {
m.nextInput()
}
case tea.KeyCtrlC, tea.KeyEsc:
return m, tea.Quit
case tea.KeyShiftTab, tea.KeyCtrlP:
m.prevInput()
case tea.KeyTab, tea.KeyCtrlN:
m.nextInput()
}
for i := range m.inputs {
m.inputs[i].Blur()
}
m.inputs[m.focused].Focus()
// We handle errors just like any other message
case errMsg:
m.err = msg
return m, nil
}
for i := range m.inputs {
m.inputs[i], cmds[i] = m.inputs[i].Update(msg)
}
return m, tea.Batch(cmds...)
}
func (m model) View() string {
return fmt.Sprintf(
` Total: $21.50:
%s
%s
%s %s
%s %s
%s
`,
inputStyle.Width(30).Render("Card Number"),
m.inputs[ccn].View(),
inputStyle.Width(6).Render("EXP"),
inputStyle.Width(6).Render("CVV"),
m.inputs[exp].View(),
m.inputs[cvv].View(),
continueStyle.Render("Continue ->"),
) + "\n"
}
// nextInput focuses the next input field
func (m *model) nextInput() {
m.focused = (m.focused + 1) % len(m.inputs)
}
// prevInput focuses the previous input field
func (m *model) prevInput() {
m.focused--
// Wrap around
if m.focused < 0 {
m.focused = len(m.inputs) - 1
}
}