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package tui
import (
"fmt"
"strings"
"adammathes.com/neko/models/feed"
"adammathes.com/neko/models/item"
"github.com/charmbracelet/bubbles/list"
tea "github.com/charmbracelet/bubbletea"
)
type viewState int
const (
viewFeeds viewState = iota
viewItems
viewContent
)
type itemDelegate struct{}
func (d itemDelegate) Height() int { return 1 }
func (d itemDelegate) Spacing() int { return 0 }
func (d itemDelegate) Update(msg tea.Msg, m *list.Model) tea.Cmd { return nil }
func (d itemDelegate) Render(w strings.Builder, m list.Model, index int, listItem list.Item) {
str, ok := listItem.(itemString)
if !ok {
return
}
if index == m.Index() {
fmt.Fprint(&w, SelectedItemStyle.Render(string(str)))
} else {
fmt.Fprint(&w, ItemStyle.Render(string(str)))
}
}
type itemString string
func (i itemString) FilterValue() string { return string(i) }
type Model struct {
state viewState
feedList list.Model
itemList list.Model
feeds []*feed.Feed
items []*item.Item
selectedFeed *feed.Feed
selectedItem *item.Item
err error
width int
height int
}
func NewModel() Model {
return Model{
state: viewFeeds,
}
}
func (m Model) Init() tea.Cmd {
return loadFeeds
}
type (
feedsMsg []*feed.Feed
itemsMsg []*item.Item
errMsg error
)
func loadFeeds() tea.Msg {
feeds, err := feed.All()
if err != nil {
return errMsg(err)
}
return feedsMsg(feeds)
}
func loadItems(feedID int64) tea.Cmd {
return func() tea.Msg {
items, err := item.Filter(0, feedID, "", false, false, 0, "")
if err != nil {
return errMsg(err)
}
return itemsMsg(items)
}
}
func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
var cmd tea.Cmd
switch msg := msg.(type) {
case tea.WindowSizeMsg:
m.width = msg.Width
m.height = msg.Height
m.feedList.SetSize(msg.Width, msg.Height-4)
m.itemList.SetSize(msg.Width, msg.Height-4)
case feedsMsg:
m.feeds = msg
items := make([]list.Item, len(m.feeds))
for i, f := range m.feeds {
items[i] = itemString(f.Title)
}
m.feedList = list.New(items, list.NewDefaultDelegate(), m.width, m.height-4)
m.feedList.Title = "Feeds"
case itemsMsg:
m.items = msg
items := make([]list.Item, len(m.items))
for i, it := range m.items {
items[i] = itemString(it.Title)
}
m.itemList = list.New(items, list.NewDefaultDelegate(), m.width, m.height-4)
m.itemList.Title = m.selectedFeed.Title
m.state = viewItems
case errMsg:
m.err = msg
return m, tea.Quit
case tea.KeyMsg:
switch msg.String() {
case "ctrl+c", "q":
if m.state == viewFeeds {
return m, tea.Quit
}
if m.state == viewItems {
m.state = viewFeeds
} else {
m.state = viewItems
}
case "enter":
if m.state == viewFeeds {
idx := m.feedList.Index()
if idx >= 0 && idx < len(m.feeds) {
m.selectedFeed = m.feeds[idx]
return m, loadItems(m.selectedFeed.Id)
}
} else if m.state == viewItems {
idx := m.itemList.Index()
if idx >= 0 && idx < len(m.items) {
m.selectedItem = m.items[idx]
m.state = viewContent
}
}
}
}
if m.state == viewFeeds {
m.feedList, cmd = m.feedList.Update(msg)
} else if m.state == viewItems {
m.itemList, cmd = m.itemList.Update(msg)
}
return m, cmd
}
func (m Model) View() string {
if m.err != nil {
return fmt.Sprintf("Error: %v", m.err)
}
var s strings.Builder
s.WriteString(TitleStyle.Render("NEKO TUI") + "\n\n")
switch m.state {
case viewFeeds:
s.WriteString(m.feedList.View())
case viewItems:
s.WriteString(m.itemList.View())
case viewContent:
if m.selectedItem != nil {
s.WriteString(HeaderStyle.Render(m.selectedItem.Title) + "\n")
s.WriteString(ContentStyle.Render(m.selectedItem.Description) + "\n\n")
s.WriteString(StatusStyle.Render("Press 'q' or 'esc' to go back"))
}
}
return s.String()
}
func Run() error {
p := tea.NewProgram(NewModel(), tea.WithAltScreen())
if _, err := p.Run(); err != nil {
return err
}
return nil
}
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