menu_view.go

package main

import (
	"fmt"
	"io"
	"strings"

	"github.com/charmbracelet/bubbles/list"
	"github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
)

var (
	titleStyle        = lipgloss.NewStyle().MarginLeft(2)
	itemStyle         = lipgloss.NewStyle().PaddingLeft(4)
	selectedItemStyle = lipgloss.NewStyle().PaddingLeft(2).Foreground(lipgloss.Color("170"))
	paginationStyle   = list.DefaultStyles().PaginationStyle.PaddingLeft(4)
	helpStyle         = list.DefaultStyles().HelpStyle.PaddingLeft(4).PaddingBottom(1)
	quitTextStyle     = lipgloss.NewStyle().Margin(1, 0, 2, 4)
)

type item struct {
	title string
	view  string
}

func (i item) FilterValue() string { return "" }

type itemDelegate struct{}

func (d itemDelegate) Height() int                             { return 1 }
func (d itemDelegate) Spacing() int                            { return 0 }
func (d itemDelegate) Update(_ tea.Msg, _ *list.Model) tea.Cmd { return nil }
func (d itemDelegate) Render(w io.Writer, m list.Model, index int, listItem list.Item) {
	i, ok := listItem.(item)
	if !ok {
		return
	}

	str := fmt.Sprintf("%d. %s", index+1, i.title)

	fn := itemStyle.Render
	if index == m.Index() {
		fn = func(s ...string) string {
			return selectedItemStyle.Render("> " + strings.Join(s, " "))
		}
	}

	fmt.Fprint(w, fn(str))
}

func renderMenu(m *model) {
	items := []list.Item{
		item{title: "Enter new Spending", view: "input"},
		item{title: "Show previous spendings", view: "table"},
	}

	const listHeight = 14
	const defaultWidth = 20

	l := list.New(items, itemDelegate{}, defaultWidth, listHeight)
	l.Title = "Menu"
	l.SetShowStatusBar(false)
	l.SetFilteringEnabled(false)
	l.Styles.Title = titleStyle
	l.Styles.PaginationStyle = paginationStyle
	l.Styles.HelpStyle = helpStyle

	m.menu = l
}

func (m *model) updateMenu(msg tea.Msg) (list.Model, tea.Cmd) {
	switch msg := msg.(type) {
	case tea.KeyMsg:
		{
			switch keypress := msg.String(); keypress {
			case "enter":
				i, ok := m.menu.SelectedItem().(item)
				if ok {
					m.curView = i.view
				}
			}
		}
	}

	return m.menu.Update(msg)
}