glow/ui/stash.go

package ui

import (
	"fmt"
	"sort"
	"strconv"
	"strings"

	"github.com/charmbracelet/boba"
	"github.com/charmbracelet/boba/spinner"
	"github.com/charmbracelet/charm"
	"github.com/charmbracelet/charm/ui/common"
	"github.com/muesli/reflow/indent"
	te "github.com/muesli/termenv"
)

// MSG

type stashErrMsg error
type stashSpinnerTickMsg struct{}
type gotStashMsg []*charm.Markdown
type gotStashedItemMsg *charm.Markdown

// MODEL

type stashState int

const (
	stashStateInit stashState = iota
	stashStateLoaded
	stashStateLoadingItem
)

type stashModel struct {
	cc        *charm.Client
	err       error
	state     stashState
	documents []*charm.Markdown
	page      int
	spinner   spinner.Model
	index     int
}

// INIT

func stashInit(cc *charm.Client) (stashModel, boba.Cmd) {
	s := spinner.NewModel()
	s.Type = spinner.Dot
	s.ForegroundColor = common.SpinnerColor
	s.CustomMsgFunc = newSpinnerTickMsg

	m := stashModel{
		cc:      cc,
		spinner: s,
		page:    1,
	}

	return m, boba.Batch(
		loadStash(m),
		spinner.Tick(s),
	)
}
func newSpinnerTickMsg() boba.Msg {
	return stashSpinnerTickMsg{}
}

// UPDATE

func stashUpdate(msg boba.Msg, m stashModel) (stashModel, boba.Cmd) {
	switch msg := msg.(type) {

	case boba.KeyMsg:
		switch msg.String() {

		case "k":
			fallthrough
		case "up":
			m.index = max(0, m.index-1)
			return m, nil

		case "j":
			fallthrough
		case "down":
			m.index = min(len(m.documents)-1, m.index+1)
			return m, nil

		case "enter":
			m.state = stashStateLoadingItem
			return m, boba.Batch(
				loadStashedItem(m.cc, m.documents[m.index].ID),
				spinner.Tick(m.spinner),
			)

		}

	case stashErrMsg:
		m.err = msg
		return m, nil

	case gotStashMsg:
		sort.Sort(charm.MarkdownsByCreatedAt(msg)) // sort by date
		m.documents = msg
		m.state = stashStateLoaded
		return m, nil

	case stashSpinnerTickMsg:
		if m.state == stashStateInit || m.state == stashStateLoadingItem {
			var cmd boba.Cmd
			m.spinner, cmd = spinner.Update(msg, m.spinner)
			return m, cmd
		}
	}

	return m, nil
}

// VIEW

func stashView(m stashModel) string {
	var s string
	switch m.state {
	case stashStateInit:
		s += spinner.View(m.spinner) + " Loading stash..."
	case stashStateLoadingItem:
		s += spinner.View(m.spinner) + " Loading document..."
	case stashStateLoaded:
		if len(m.documents) == 0 {
			s += stashEmtpyView(m)
			break
		}
		s += stashPopulatedView(m)
	}
	return "\n" + indent.String(s, 2)
}

func stashEmtpyView(m stashModel) string {
	return "Nothing stashed yet."
}

func stashPopulatedView(m stashModel) string {
	s := "Here's your markdown stash:\n\n"
	for i, v := range m.documents {
		state := common.StateNormal
		if i == m.index {
			state = common.StateSelected
		}
		s += stashListItemView(*v).render(state) + "\n\n"
	}
	s = strings.TrimSpace(s)
	return s
}

type stashListItemView charm.Markdown

func (m stashListItemView) render(state common.State) string {
	line := common.VerticalLine(state) + " "
	keyColor := common.NoColor
	switch state {
	case common.StateSelected:
		keyColor = common.Fuschia
	case common.StateDeleting:
		keyColor = common.Red
	}
	titleKey := strconv.Itoa(m.ID)
	if m.Note != "" {
		titleKey += ":"
	}
	titleKey = te.String("#" + titleKey).Foreground(keyColor.Color()).String()
	dateKey := te.String("Stashed:").Foreground(keyColor.Color()).String()
	var s string
	s += fmt.Sprintf("%s%s %s\n", line, titleKey, m.title(state))
	s += fmt.Sprintf("%s%s %s", line, dateKey, m.date(state))
	return s
}

func (m stashListItemView) date(state common.State) string {
	c := common.Indigo
	if state == common.StateDeleting {
		c = common.FaintRed
	}
	s := m.CreatedAt.Format("02 Jan 2006 15:04:05 MST")
	return te.String(s).Foreground(c.Color()).String()
}

func (m stashListItemView) title(state common.State) string {
	if m.Note == "" {
		return ""
	}
	c := common.Indigo
	if state == common.StateDeleting {
		c = common.Red
	}
	return te.String(m.Note).Foreground(c.Color()).String()
}

// CMD

func loadStash(m stashModel) boba.Cmd {
	return func() boba.Msg {
		stash, err := m.cc.GetStash(m.page)
		if err != nil {
			return stashErrMsg(err)
		}
		return gotStashMsg(stash)
	}
}

func loadStashedItem(cc *charm.Client, id int) boba.Cmd {
	return func() boba.Msg {
		m, err := cc.GetStashMarkdown(id)
		if err != nil {
			return stashErrMsg(err)
		}
		return gotStashedItemMsg(m)
	}
}