forked from Mirrors/bubbletea
93 lines
2.1 KiB
Go
93 lines
2.1 KiB
Go
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package main
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// A simple example that shows how to send activity to Bubble Tea in real-time
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// through a channel.
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import (
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"fmt"
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"math/rand"
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"os"
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"time"
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"github.com/charmbracelet/bubbles/spinner"
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tea "github.com/charmbracelet/bubbletea"
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)
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// A message used to indicate that activity has occured. In the real world (for
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// example, chat) this would contain actual data.
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type responseMsg struct{}
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// Simulate a process that sends events at an irregular interval in real time.
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// In this case, we'll send events on the channel at a random interval between
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// 100 to 1000 milliseconds. As a command, Bubble Tea will run this
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// asyncronously.
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func listenForActivity(sub chan struct{}) tea.Cmd {
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return func() tea.Msg {
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for {
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time.Sleep(time.Millisecond * time.Duration(rand.Int63n(900)+100))
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sub <- struct{}{}
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}
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}
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}
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// A command that waits for the activity on a channel.
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func waitForActivity(sub chan struct{}) tea.Cmd {
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return func() tea.Msg {
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return responseMsg(<-sub)
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}
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}
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type model struct {
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sub chan struct{} // where we'll receive activity notifications
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responses int // how many responses we've received
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spinner spinner.Model
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quitting bool
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}
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func (m model) Init() tea.Cmd {
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return tea.Batch(
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spinner.Tick,
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listenForActivity(m.sub), // generate activity
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waitForActivity(m.sub), // wait for activity
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)
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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.(type) {
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case tea.KeyMsg:
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m.quitting = true
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return m, tea.Quit
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case responseMsg:
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m.responses++ // record external activity
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return m, waitForActivity(m.sub) // wait for next event
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case spinner.TickMsg:
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var cmd tea.Cmd
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m.spinner, cmd = m.spinner.Update(msg)
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return m, cmd
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default:
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return m, nil
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}
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}
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func (m model) View() string {
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s := fmt.Sprintf("\n %s Events received: %d\n\n Press any key to exit\n", m.spinner.View(), m.responses)
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if m.quitting {
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s += "\n"
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}
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return s
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}
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func main() {
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rand.Seed(time.Now().UTC().UnixNano())
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p := tea.NewProgram(model{
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sub: make(chan struct{}),
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spinner: spinner.NewModel(),
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})
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if p.Start() != nil {
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fmt.Println("could not start program")
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os.Exit(1)
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}
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}
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