todo-with-db/goto-do/cmd/root.go

/*
Copyright © 2024 tiff github@tifflabs.org
*/
package cmd

import (
	"fmt"
    "os"
    "os/signal"

	"github.com/charmbracelet/bubbles/table"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
    "context"
    "database/sql"
    "flag"
    "log"
    "time"
    
)


var baseStyle = lipglodd.NewStyle().
  BorderStyle(lipgloss.NormalBorder()).
  BorderForeground(lipgloss.Color("240"))



// Think of this `struct` as a JavaScript object or Python dictionary
type model struct {
    // methods? Probably not
	todos    []string         // items on the to-do list
	cursor   int              // which to-do list item our cursor is pointing at 
// so it looks like Go doesn't have `_self` or `this`?
	selected map[int]struct{} // which to-do items are selected
    table table.Model
}

func (m model) Init() tea.Cmd { return nil } 

func initialModel() model {
	return model{
		// Our to-do list is a grocery list
		todos: []string{""},

		// A map which indicates which choices are selected. We're using
		// the  map like a mathematical set. The keys refer to the indexes
		// of the `choices` slice, above.
		selected: make(map[int]struct{}),
	}
}

func (m model) Init() tea.Cmd {
	// Just return `nil`, which means "no I/O right now, please."
	return nil
}

func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	switch msg := msg.(type) {
	// Is it a key press?
	case tea.KeyMsg:

		// Cool, what was the actual key pressed?
		switch msg.String() {

		// These keys should exit the program.
		case "ctrl+c", "q":
			return m, tea.Quit

		// The "up" and "k" keys move the cursor up
		case "up", "k":
			if m.cursor > 0 {
				m.cursor--
			}

		// The "down" and "j" keys move the cursor down
		case "down", "j":
			if m.cursor < len(m.todos)-1 {
				m.cursor++
			}

		// The "enter" key and the spacebar (a literal space) toggle
		// the selected state for the item that the cursor is pointing at.
		case "enter", " ":
			_, ok := m.selected[m.cursor]
			if ok {
				delete(m.selected, m.cursor)
			} else {
				m.selected[m.cursor] = struct{}{}
			}
		}
	}

	// Return the updated model to the Bubble Tea runtime for processing.
	// Note that we're not returning a command.
	return m, nil
}

func (m model) View() string {
	// The header
	s := "What do you want to do today?\n\n"

	// Iterate over our choices
	for i, todo := range m.todos {

		// Is the cursor pointing at this choice?
		cursor := " " // no cursor
		if m.cursor == i {
			cursor = ">" // cursor!
		}

		// Is this choice selected?
		checked := " " // not selected
		if _, ok := m.selected[i]; ok {
			checked = "x" // selected!
		}

		// Render the row
		s += fmt.Sprintf("%s [%s] %s\n", cursor, checked, todo)
	}

	// The footer
	s += "\nPress q to quit.\n"

	// Send the UI for rendering
	return s
}