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model.go
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model.go
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package main
import (
"fmt"
"io"
"github.com/charmbracelet/bubbles/help"
"github.com/charmbracelet/bubbles/key"
"github.com/charmbracelet/bubbles/list"
"github.com/charmbracelet/bubbles/textinput"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
)
var (
itemStyle = lipgloss.NewStyle()
selectedItemStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("#5F5FDF")).Bold(true)
positiveNumStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("#00FF00"))
negativeNumStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("#FF0000"))
neutralNumStyle = lipgloss.NewStyle()
)
type Post struct {
Title string
Rank int
RankDelta int // This will be used to track the user's vote
Username string
}
type keyMap struct {
Compose key.Binding
Uprank key.Binding
Downrank key.Binding
Up key.Binding
Down key.Binding
Left key.Binding
Right key.Binding
Help key.Binding
Quit key.Binding
Submit key.Binding
}
func (k keyMap) ShortHelp() []key.Binding {
return []key.Binding{k.Compose, k.Help, k.Quit}
}
func (k keyMap) FullHelp() [][]key.Binding {
return [][]key.Binding{
{k.Up, k.Down, k.Left, k.Right},
{k.Compose, k.Uprank, k.Downrank},
{k.Help, k.Quit},
}
}
var keys = keyMap{
Compose: key.NewBinding(key.WithKeys("n"), key.WithHelp("n", "new idea")),
Uprank: key.NewBinding(key.WithKeys("+", "="), key.WithHelp("+", "uprank")),
Downrank: key.NewBinding(key.WithKeys("-", "_"), key.WithHelp("-", "downrank")),
Up: key.NewBinding(key.WithKeys("up", "k"), key.WithHelp("↑/k", "move up")),
Down: key.NewBinding(key.WithKeys("down", "j"), key.WithHelp("↓/j", "move down")),
Left: key.NewBinding(key.WithKeys("left", "h"), key.WithHelp("←/h", "move left")),
Right: key.NewBinding(key.WithKeys("right", "l"), key.WithHelp("→/l", "move right")),
Help: key.NewBinding(key.WithKeys("?"), key.WithHelp("?", "toggle help")),
Quit: key.NewBinding(key.WithKeys("q", "ctrl+c"), key.WithHelp("q", "quit")),
}
func (p Post) FilterValue() string { return p.Title }
type postDelegate struct{}
func (d postDelegate) Height() int { return 1 }
func (d postDelegate) Spacing() int { return 0 }
func (d postDelegate) Update(msg tea.Msg, l *list.Model) tea.Cmd { return nil }
func (d postDelegate) Render(w io.Writer, m list.Model, index int, listItem list.Item) {
post, ok := listItem.(Post)
if !ok {
return
}
postCount := ""
if post.Rank+post.RankDelta > 0 {
postCount = positiveNumStyle.Render(fmt.Sprintf("%d", post.Rank+post.RankDelta))
} else if post.Rank+post.RankDelta < 0 {
postCount = negativeNumStyle.Render(fmt.Sprintf("%d", post.Rank+post.RankDelta))
} else {
postCount = neutralNumStyle.Render(fmt.Sprintf("%d", post.Rank+post.RankDelta))
}
fn := itemStyle.Render
if index == m.Index() {
fn = selectedItemStyle.Render
}
fmt.Fprintln(w, fmt.Sprintf(" ▲ %s ▼ %s \n", postCount, fn(post.Username+" - "+post.Title)))
}
// Just a generic tea.Model to demo terminal information of ssh.
type model struct {
currentUsername string
list list.Model
help help.Model
input textinput.Model
inputStyle lipgloss.Style
OnNew func(Post)
OnUpdate func(Post)
Refresh func() []Post
width int
height int
}
func (m model) Init() tea.Cmd {
return nil
}
func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
var cmd tea.Cmd
var cmds []tea.Cmd
// Make sure to update the list if we aren't doing input
if !m.input.Focused() {
m.list, cmd = m.list.Update(msg)
cmds = append(cmds, cmd)
} else {
m.input, cmd = m.input.Update(msg)
cmds = append(cmds, cmd)
}
switch msg := msg.(type) {
case tea.WindowSizeMsg:
m.height = msg.Height
m.width = msg.Width
m.list.SetWidth(msg.Width)
case tea.KeyMsg:
switch {
case key.Matches(msg, keys.Compose):
m.input.Focus()
cmds = append(cmds, textinput.Blink)
keys.Quit.SetEnabled(false)
keys.Downrank.SetEnabled(false)
keys.Uprank.SetEnabled(false)
keys.Help.SetEnabled(false)
case key.Matches(msg, keys.Uprank):
post := m.list.SelectedItem().(Post)
if post.RankDelta == 0 || post.RankDelta == -1 {
post.RankDelta += 1
}
m.list.SetItem(m.list.Index(), post)
if m.OnUpdate != nil {
m.OnUpdate(post)
}
case key.Matches(msg, keys.Downrank):
post := m.list.SelectedItem().(Post)
if post.RankDelta == 1 || post.RankDelta == 0 {
post.RankDelta -= 1
}
m.list.SetItem(m.list.Index(), post)
if m.OnUpdate != nil {
m.OnUpdate(post)
}
case key.Matches(msg, keys.Quit):
return m, tea.Quit
case key.Matches(msg, key.NewBinding(key.WithKeys("esc"))) && m.input.Focused():
m.input.Blur()
keys.Quit.SetEnabled(true)
keys.Downrank.SetEnabled(true)
keys.Uprank.SetEnabled(true)
keys.Help.SetEnabled(true)
case key.Matches(msg, key.NewBinding(key.WithKeys("enter"))) && m.input.Focused():
if m.input.Value() == "" {
break
}
post := Post{
Title: m.input.Value(),
Rank: 0,
RankDelta: 0,
Username: m.currentUsername,
}
m.input.SetValue("")
m.input.Blur()
keys.Quit.SetEnabled(true)
keys.Downrank.SetEnabled(true)
keys.Uprank.SetEnabled(true)
keys.Help.SetEnabled(true)
cmd = m.list.InsertItem(len(m.list.Items()), post)
cmds = append(cmds, cmd)
if m.OnNew != nil {
m.OnNew(post)
}
case key.Matches(msg, keys.Help):
m.help.ShowAll = !m.help.ShowAll
}
}
return m, tea.Batch(cmds...)
}
func (m model) View() string {
if m.input.Focused() {
return lipgloss.Place(m.width, m.height, lipgloss.Center, lipgloss.Center,
m.inputStyle.Render(m.input.View()),
)
}
list := m.list.View()
app := m.inputStyle.Render(list + "\n" + m.help.View(keys))
app = lipgloss.PlaceVertical(m.height, lipgloss.Center, app)
return lipgloss.PlaceHorizontal(m.width, lipgloss.Center, app)
}