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model.go
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model.go
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package browser
import (
"bytes"
clist "container/list"
"errors"
"fmt"
"log/slog"
"path/filepath"
"regexp"
"strings"
"github.com/charmbracelet/bubbles/list"
"github.com/charmbracelet/bubbles/textinput"
"github.com/charmbracelet/bubbles/viewport"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
zone "github.com/lrstanley/bubblezone"
"github.com/muesli/reflow/wordwrap"
"github.com/gnolang/gno/gno.land/pkg/gnoclient"
"github.com/gnolang/gno/gno.land/pkg/sdk/vm"
"github.com/gnolang/gno/tm2/pkg/log"
)
var promptStyle = func(r *lipgloss.Renderer) lipgloss.Style {
return r.NewStyle().
Bold(true).
Foreground(lipgloss.Color("#dd7878"))
}
var ErrEmptyRenderer = errors.New("empty rendrer")
type Config struct {
URLPrefix string
URLDefaultValue string
Logger *slog.Logger
Renderer *lipgloss.Renderer
Readonly bool
Banner ModelBanner
}
const DefaultGnoLandPrefix = "gno.land/"
func DefaultConfig() Config {
return Config{
Logger: log.NewNoopLogger(),
URLPrefix: DefaultGnoLandPrefix,
Renderer: lipgloss.DefaultRenderer(),
URLDefaultValue: "gnoland/home",
}
}
type model struct {
render *lipgloss.Renderer
client *NodeClient
logger *slog.Logger
// misc
banner ModelBanner
bannerDiscarded bool
// Viewport
zone *zone.Manager
ready bool
viewport viewport.Model
height, width int
readonly bool
messageDisplay bool
// Nav
taskLoader LoaderModel
pageurls map[string]string
history *clist.List
current *clist.Element
// Url
urlInput textinput.Model
urlPrefix string
// Commands
listFuncs FuncListModel
commandInput textinput.Model
commandFocus bool
}
func initURLInput(prefix string, r *lipgloss.Renderer) textinput.Model {
ti := textinput.New()
ti.Placeholder = "r/gnoland/blog" // XXX: Use as example, customize this ?
ti.Focus()
ti.CharLimit = 156
ti.PromptStyle = promptStyle(r)
ti.Prompt = prefix + "/"
return ti
}
func initCommandInput(r *lipgloss.Renderer) textinput.Model {
ti := textinput.New()
ti.Placeholder = ""
ti.CharLimit = 156
ti.PromptStyle = promptStyle(r)
ti.Prompt = "> "
return ti
}
func New(cfg Config, client *gnoclient.Client) tea.Model {
renderer := lipgloss.DefaultRenderer()
if cfg.Renderer != nil {
renderer = cfg.Renderer
}
// Setup url input
urlinput := initURLInput(cfg.URLPrefix, renderer)
path := cleanupRealmPath(cfg.URLPrefix, cfg.URLDefaultValue)
urlinput.SetValue(path)
// Setup cmd input
cmdinput := initCommandInput(renderer)
// XXX: Customize this
base := gnoclient.BaseTxCfg{
GasFee: "1000000ugnot",
GasWanted: 2000000,
}
nodeclient := NewNodeClient(cfg.Logger, base, client)
return &model{
logger: cfg.Logger,
render: cfg.Renderer,
readonly: cfg.Readonly,
client: nodeclient,
taskLoader: newLoaderModel(),
banner: cfg.Banner,
bannerDiscarded: cfg.Banner.Empty(),
urlInput: urlinput,
urlPrefix: cfg.URLPrefix,
commandInput: cmdinput,
listFuncs: newFuncList(),
zone: zone.New(),
pageurls: map[string]string{},
history: clist.New(),
}
}
func (m model) Init() tea.Cmd {
m.history.Init()
return m.banner.Init()
}
type fetchRealmMsg struct {
realmPath string
}
func FetchRealm(path string) tea.Cmd {
return func() tea.Msg { return fetchRealmMsg{path} }
}
func RefreshRealm() tea.Cmd {
return func() tea.Msg { return fetchRealmMsg{""} }
}
type renderUpdateMsg struct {
Render []byte
Funcs vm.FunctionSignatures
Error error
}
func (m *model) RenderUpdate(path string) tea.Cmd {
return func() tea.Msg {
var msg renderUpdateMsg
var err error
msg.Render, err = m.fetchRenderView(path)
if err != nil {
msg.Error = fmt.Errorf("unable to fetch view: %w", err)
return msg
}
msg.Funcs, err = m.fetchFuncsList(path)
if err != nil {
msg.Error = fmt.Errorf("unable to fetch function list: %w", err)
return msg
}
return msg
}
}
type execCommandRequestMsg struct {
Path string
Command string
}
func (m *model) ExecCommandRequest(path, command string) tea.Cmd {
return func() tea.Msg {
return execCommandRequestMsg{path, command}
}
}
type execCommandMsg struct {
Response []byte
Error error
}
func (m *model) ExecCommand(path, command string) tea.Cmd {
return func() tea.Msg {
res, err := m.client.Call(path, command)
return execCommandMsg{res, err}
}
}
func (m *model) ExtendCommandInput() bool {
if !m.commandInput.Focused() {
return false
}
if item, ok := m.listFuncs.SelectedItem().(itemFunc); ok {
var value string
if len(item.Params) > 0 {
value = item.Title() + "("
} else {
value = item.Title() + "()"
}
currentValue := m.commandInput.Value()
if len(value) > len(currentValue) && strings.HasPrefix(value, currentValue) {
m.commandInput.SetValue(value)
return true
}
// Put cursor at the end
m.commandInput.CursorEnd()
}
return false
}
func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
var cmd tea.Cmd
switch msg := msg.(type) {
case fetchRealmMsg:
if msg.realmPath != "" {
return m, tea.Sequence(m.taskLoader.Add(1), m.moveToRealm(msg.realmPath))
}
// If no realm path is given simply refresh the current realm
path := m.getCurrentPath()
m.logger.Info("rendering realm", "path", path)
return m, tea.Sequence(m.taskLoader.Add(1), m.RenderUpdate(path))
case execCommandRequestMsg:
m.logger.Info("requesting command", "path", msg.Path, "cmd", msg.Command)
cmd = m.ExecCommand(msg.Path, msg.Command)
return m, tea.Sequence(m.taskLoader.Add(1), cmd)
case execCommandMsg:
m.taskLoader.Done()
// If any error, display it as message.
if msg.Error != nil {
m.logger.Warn("command exec", "error", msg.Error)
content := wordwrap.NewWriter(m.viewport.Width)
fmt.Fprint(content, msg.Error.Error())
fmt.Fprintf(content, "\n\npress [enter] to dismiss error\n")
m.viewport.SetContent(content.String())
m.messageDisplay = true
return m, nil
}
// If any response, display it as message.
if res := bytes.TrimSpace(msg.Response); len(res) > 0 {
m.logger.Info("command exec", "res", string(res))
content := wordwrap.NewWriter(m.viewport.Width)
content.Write(res)
fmt.Fprintf(content, "\n\npress [enter] to dismiss message\n")
m.viewport.SetContent(content.String())
m.messageDisplay = true
return m, nil
}
// If no error or empty response is returned, simply refresh the page.
m.messageDisplay = false
return m, RefreshRealm()
case renderUpdateMsg:
m.taskLoader.Done()
var content string
if err := msg.Error; err != nil {
m.logger.Warn("render", "error", msg.Error)
// Write error to the frame
content = fmt.Sprintf("ERROR: %s", err.Error())
} else {
content = string(m.findAndMarkURLs(msg.Render))
}
if len(msg.Funcs) > 0 {
items := make([]list.Item, 0, len(msg.Funcs))
for _, fun := range msg.Funcs {
if fun.FuncName != "Render" {
items = append(items, itemFunc(fun))
}
}
m.listFuncs.SetItems(items)
m.listFuncs.FilterItems(m.commandInput.Value())
// Update funcs list
m.listFuncs.Title = m.urlInput.Value()
m.listFuncs.SetSize(m.viewport.Width, 7)
}
m.viewport.SetContent(content)
return m, cmd
case SpinnerTickMsg:
if m.taskLoader.Active() {
m.taskLoader, cmd = m.taskLoader.Update(msg)
}
case tea.MouseMsg:
cmd = m.updateMouse(msg)
// Fallback on viewport
if cmd == nil {
m.viewport, cmd = m.viewport.Update(msg)
}
return m, cmd
case tea.KeyMsg:
cmd = m.updateKey(msg)
m.listFuncs.FilterItems(m.commandInput.Value())
if !m.readonly && cmd == nil {
m.listFuncs, cmd = m.listFuncs.Update(msg)
}
// Fallback on list funcs update
if cmd == nil {
m.viewport, cmd = m.viewport.Update(msg)
}
// Fallback on viewport update
return m, cmd
case tea.WindowSizeMsg:
m.width = msg.Width
headerHeight := lipgloss.Height(m.headerView())
footerHeight := lipgloss.Height(m.footerView())
verticalMarginHeight := headerHeight + footerHeight
if !m.ready {
m.viewport = viewport.New(msg.Width, msg.Height-verticalMarginHeight)
m.viewport.YPosition = headerHeight
m.viewport.MouseWheelEnabled = true
m.viewport.MouseWheelDelta = 1
m.ready = true
m.viewport.YPosition = headerHeight + 1
if value := m.urlInput.Value(); value != "" {
cmd = RefreshRealm()
m.updateHistory()
}
} else {
m.viewport.Width = msg.Width
m.viewport.Height = msg.Height - verticalMarginHeight
}
m.height = m.viewport.Height
if !m.urlInput.Focused() && len(m.listFuncs.Items()) > 0 {
m.viewport.Height = m.height - lipgloss.Height(m.listFuncsView())
}
return m, cmd
}
// Update other models
cmds := []tea.Cmd{cmd}
if !m.bannerDiscarded {
var bannerCmd tea.Cmd
m.banner, bannerCmd = m.banner.Update(msg)
cmds = append(cmds, bannerCmd)
}
var viewCmd tea.Cmd
m.viewport, viewCmd = m.viewport.Update(msg)
cmds = append(cmds, viewCmd)
var funcCmd tea.Cmd
m.listFuncs, funcCmd = m.listFuncs.Update(msg)
cmds = append(cmds, funcCmd)
return m, tea.Batch(cmds...)
}
func (m *model) updateKey(msg tea.KeyMsg) tea.Cmd {
var cmd tea.Cmd
if !m.bannerDiscarded {
switch key := msg.String(); key {
case "ctrl+c":
return tea.Quit
case "enter":
m.bannerDiscarded = true
}
// Discard other input while banner is active
return nil
}
switch msg.String() {
case "alt+down":
if m.urlInput.Focused() && !m.readonly {
m.urlInput.Blur()
cmd = m.commandInput.Focus()
m.commandFocus = true
}
case "alt+up":
if m.commandInput.Focused() {
m.commandInput.Blur()
cmd = m.urlInput.Focus()
m.commandFocus = false
}
case "tab":
if m.commandInput.Focused() {
m.ExtendCommandInput()
}
case "alt+r":
cmd = RefreshRealm()
case "enter":
// Update command on focus
if m.commandInput.Focused() && !m.messageDisplay {
if len(m.listFuncs.Items()) == 1 {
path := m.getCurrentPath()
cmd = m.ExecCommand(path, m.commandInput.Value())
} else {
m.ExtendCommandInput()
}
break
}
// Update url on focus
if m.messageDisplay || m.urlInput.Focused() {
m.listFuncs.Erase()
cmd = m.moveToRealm(m.urlInput.Value())
if m.current.Value.(string) != m.urlInput.Value() {
m.updateHistory()
}
// Discard message
m.messageDisplay = false
}
case "ctrl+c", "esc":
return tea.Quit
default:
// handle url input
if m.urlInput.Focused() {
m.urlInput, cmd = m.urlInput.Update(msg)
}
if m.commandInput.Focused() {
// handle command input
m.commandInput, cmd = m.commandInput.Update(msg)
}
}
return cmd
}
func (m *model) updateMouse(msg tea.MouseMsg) tea.Cmd {
if msg.Action != tea.MouseActionRelease {
return nil
}
var cmd tea.Cmd
switch {
case m.zone.Get("prev_button").InBounds(msg):
if path, ok := m.moveHistoryBackward(); ok {
cmd = m.moveToRealm(path)
}
case m.zone.Get("next_button").InBounds(msg):
if path, ok := m.moveHistoryForward(); ok {
cmd = m.moveToRealm(path)
}
case m.zone.Get("home_button").InBounds(msg):
if cmd = m.moveToRealm("gno.land/r/gnoland/home"); cmd != nil {
m.updateHistory()
}
case m.zone.Get("url_input").InBounds(msg):
m.commandInput.Blur()
cmd = m.urlInput.Focus()
m.commandFocus = false
case !m.readonly && m.zone.Get("command_input").InBounds(msg):
m.urlInput.Blur()
cmd = m.commandInput.Focus()
m.commandFocus = true
default:
for mark := range m.pageurls {
if !m.zone.Get(mark).InBounds(msg) {
continue
}
if uri := m.pageurls[mark]; uri != "" {
if cmd = m.moveToRealm(uri); cmd != nil {
m.updateHistory()
break
}
}
}
}
return cmd
}
// realm path surrounded by ansi escape sequences
var reUrlPattern = regexp.MustCompile(`(?mU)\x1b[^m]*m(?:(?:https?://)?gno.land)?(/[^\s]+)\x1b[^m]*m`)
func (m model) findAndMarkURLs(body []byte) []byte {
var buf bytes.Buffer
lastIndex := 0
indexes := reUrlPattern.FindAllSubmatchIndex(body, -1)
for i, loc := range indexes {
match := string(body[loc[0]:loc[1]])
uri := string(body[loc[2]:loc[3]])
markid := fmt.Sprintf("url_%d", i)
// Write bytes before match
buf.Write(body[lastIndex:loc[0]])
// Write quoted URL
buf.WriteString(m.zone.Mark(markid, match))
m.pageurls[markid] = uri
lastIndex = loc[1]
}
// Write remaining bytes
buf.Write(body[lastIndex:])
// Cleanup previous urls
for i := len(indexes); i < len(m.pageurls); i++ {
markid := fmt.Sprintf("url_%d", i)
delete(m.pageurls, markid)
}
return buf.Bytes()
}
func (m model) fetchFuncsList(path string) (view vm.FunctionSignatures, err error) {
rlmpath, _, _ := strings.Cut(path, ":")
funcs, err := m.client.Funcs(rlmpath)
if err != nil {
return nil, fmt.Errorf("unable to fetch Render: %w", err)
}
return funcs, nil
}
func (m *model) getCurrentPath() string {
path := strings.Trim(m.urlInput.Value(), "/")
if len(path) == 0 {
return m.urlPrefix
}
return filepath.Join(m.urlPrefix, path)
}