forked from Mirrors/bubbletea
92 lines
1.7 KiB
Go
92 lines
1.7 KiB
Go
package main
|
||
|
||
// A simple program that counts down from 5 and then exits.
|
||
|
||
import (
|
||
"errors"
|
||
"fmt"
|
||
"log"
|
||
"tea"
|
||
|
||
"tea/input"
|
||
)
|
||
|
||
type Model struct {
|
||
Input input.Model
|
||
Error error
|
||
}
|
||
|
||
type tickMsg struct{}
|
||
|
||
func main() {
|
||
tea.UseSysLog("tea")
|
||
|
||
p := tea.NewProgram(
|
||
Model{
|
||
Input: input.DefaultModel(),
|
||
Error: nil,
|
||
},
|
||
update,
|
||
view,
|
||
[]tea.Sub{
|
||
// We just hand off the subscription to the input component, giving
|
||
// it the model it expects.
|
||
func(model tea.Model) tea.Msg {
|
||
m, ok := model.(Model)
|
||
if !ok {
|
||
return tea.NewErrMsg("could not perform assertion on model")
|
||
}
|
||
return input.Blink(m.Input)
|
||
},
|
||
},
|
||
)
|
||
|
||
if err := p.Start(); err != nil {
|
||
log.Fatal(err)
|
||
}
|
||
}
|
||
|
||
func update(msg tea.Msg, model tea.Model) (tea.Model, tea.Cmd) {
|
||
var cmd tea.Cmd
|
||
m, ok := model.(Model)
|
||
if !ok {
|
||
// When we encounter errors in Update we simply add the error to the
|
||
// model so we can handle it in the view. We could also return a command
|
||
// that does something else with the error, like logs it via IO.
|
||
m.Error = errors.New("could not perform assertion on model")
|
||
return m, nil
|
||
}
|
||
|
||
switch msg := msg.(type) {
|
||
case tea.KeyMsg:
|
||
switch msg.String() {
|
||
case "break":
|
||
fallthrough
|
||
case "esc":
|
||
return m, tea.Quit
|
||
}
|
||
|
||
// We handle errors just like any other message
|
||
case tea.ErrMsg:
|
||
m.Error = msg
|
||
return m, nil
|
||
}
|
||
|
||
m.Input, cmd = input.Update(msg, m.Input)
|
||
return m, cmd
|
||
}
|
||
|
||
func view(model tea.Model) string {
|
||
m, ok := model.(Model)
|
||
if !ok {
|
||
return "Oh no: could not perform assertion on model."
|
||
} else if m.Error != nil {
|
||
return fmt.Sprintf("Uh oh: %s", m.Error)
|
||
}
|
||
return fmt.Sprintf(
|
||
"What’s your favorite Pokémon?\n\n%s\n\n%s",
|
||
input.View(m.Input),
|
||
"(esc to quit)",
|
||
)
|
||
}
|