pingo/internal/tui/tui.go

package tui

import (
	"fmt"

	"github.com/NimbleMarkets/ntcharts/linechart/streamlinechart"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
)

// Bubbletea model
//
// BUG(state): how do declare pointer here?
type Model struct {
	width     int
	Addresses []Address // as defined in internal/tui/types.go
}

func InitialModel(addresses []string) Model {
	var model Model
	for _, address := range addresses {
		var addr Address
		addr.max_results = 10
		addr.Address = address
		model.Addresses = append(model.Addresses, addr)
	}
	return model
}

func (m Model) Init() tea.Cmd {
	return m.Poll
}

func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	switch msg := msg.(type) {
	// if case is KeyMsg (keypress)
	case tea.WindowSizeMsg:
		m.width = msg.Width
		for i, address := range m.Addresses {
			address.max_results = m.width
			m.Addresses[i] = address
		}

	case tea.KeyMsg:
		return m, tea.Quit

	case pollMsg:
		m.Poll()
	}
	return m, m.Poll
}

func (m Model) View() string {
	var headerStyle = lipgloss.NewStyle().
		Bold(true).
		Italic(true)

	var blockStyle = lipgloss.NewStyle().
		Width(m.width).
		Align(lipgloss.Center)

	output := "Results:\n\n"
	for _, address := range m.Addresses {

		if len(address.results) == 0 {
			output = output + fmt.Sprintf("%s\tloading...\n\n", headerStyle.Render(address.Address))
		} else {
			output = output + fmt.Sprintf("%s\n\n", blockStyle.Render(headerStyle.Render(address.Address)))

			// Linechart
			slc := streamlinechart.New(m.width, 10)
			for _, v := range address.results {
				slc.Push(v)
			}
			slc.Draw()
			output = output + fmt.Sprintf("%s\n\n", slc.View())
		}
	}

	return output
}

// A wrapper for the underlying [tui.Address.Poll] function. For each address in
// [tui.Model.Addresses], run its respective Poll function and update [tui.Model]
//
// NOTE(async): this function fully blocks execution of the current thread.
func (m Model) Poll() tea.Msg {
	for i, element := range m.Addresses {
		element.Poll()
		m.Addresses[i] = element
	}
	return true
}