]> git.r.bdr.sh - rbdr/mobius/blobdiff - hotline/client.go
Improve handling of client config default path
[rbdr/mobius] / hotline / client.go
index 9bb33e1d557c79c9195b58223cf0be4ec15071f3..1e2972f6c8aa18c3e48a6985776641f1142c76ed 100644 (file)
@@ -6,25 +6,22 @@ import (
        "encoding/binary"
        "errors"
        "fmt"
-       "github.com/davecgh/go-spew/spew"
        "github.com/gdamore/tcell/v2"
        "github.com/rivo/tview"
        "github.com/stretchr/testify/mock"
        "go.uber.org/zap"
-       "gopkg.in/yaml.v2"
-       "io/ioutil"
+       "gopkg.in/yaml.v3"
        "math/big"
        "math/rand"
        "net"
        "os"
-       "strconv"
        "strings"
        "time"
 )
 
-const clientConfigPath = "/usr/local/etc/mobius-client-config.yaml"
 const (
        trackerListPage = "trackerList"
+       serverUIPage    = "serverUI"
 )
 
 //go:embed banners/*.txt
@@ -50,6 +47,12 @@ func (cp *ClientPrefs) IconBytes() []byte {
        return iconBytes
 }
 
+func (cp *ClientPrefs) AddBookmark(name, addr, login, pass string) error {
+       cp.Bookmarks = append(cp.Bookmarks, Bookmark{Addr: addr, Login: login, Password: pass})
+
+       return nil
+}
+
 func readConfig(cfgPath string) (*ClientPrefs, error) {
        fh, err := os.Open(cfgPath)
        if err != nil {
@@ -58,7 +61,6 @@ func readConfig(cfgPath string) (*ClientPrefs, error) {
 
        prefs := ClientPrefs{}
        decoder := yaml.NewDecoder(fh)
-       decoder.SetStrict(true)
        if err := decoder.Decode(&prefs); err != nil {
                return nil, err
        }
@@ -66,6 +68,7 @@ func readConfig(cfgPath string) (*ClientPrefs, error) {
 }
 
 type Client struct {
+       cfgPath     string
        DebugBuf    *DebugBuffer
        Connection  net.Conn
        Login       *[]byte
@@ -74,10 +77,11 @@ type Client struct {
        ID          *[]byte
        Version     []byte
        UserAccess  []byte
-       Agreed      bool
+       filePath    []string
        UserList    []User
        Logger      *zap.SugaredLogger
        activeTasks map[uint32]*Transaction
+       serverName  string
 
        pref *ClientPrefs
 
@@ -85,176 +89,25 @@ type Client struct {
 
        UI *UI
 
-       outbox chan *Transaction
-       Inbox  chan *Transaction
-}
-
-type UI struct {
-       chatBox      *tview.TextView
-       chatInput    *tview.InputField
-       App          *tview.Application
-       Pages        *tview.Pages
-       userList     *tview.TextView
-       agreeModal   *tview.Modal
-       trackerList  *tview.List
-       settingsPage *tview.Box
-       HLClient     *Client
-}
-
-func NewUI(c *Client) *UI {
-       app := tview.NewApplication()
-       chatBox := tview.NewTextView().
-               SetScrollable(true).
-               SetDynamicColors(true).
-               SetWordWrap(true).
-               SetChangedFunc(func() {
-                       app.Draw() // TODO: docs say this is bad but it's the only way to show content during initial render??
-               })
-       chatBox.Box.SetBorder(true).SetTitle("Chat")
-
-       chatInput := tview.NewInputField()
-       chatInput.
-               SetLabel("> ").
-               SetFieldBackgroundColor(tcell.ColorDimGray).
-               SetDoneFunc(func(key tcell.Key) {
-                       // skip send if user hit enter with no other text
-                       if len(chatInput.GetText()) == 0 {
-                               return
-                       }
-
-                       c.Send(
-                               *NewTransaction(tranChatSend, nil,
-                                       NewField(fieldData, []byte(chatInput.GetText())),
-                               ),
-                       )
-                       chatInput.SetText("") // clear the input field after chat send
-               })
-
-       chatInput.Box.SetBorder(true).SetTitle("Send")
-
-       userList := tview.
-               NewTextView().
-               SetDynamicColors(true).
-               SetChangedFunc(func() {
-                       app.Draw() // TODO: docs say this is bad but it's the only way to show content during initial render??
-               })
-       userList.Box.SetBorder(true).SetTitle("Users")
-
-       return &UI{
-               App:         app,
-               chatBox:     chatBox,
-               Pages:       tview.NewPages(),
-               chatInput:   chatInput,
-               userList:    userList,
-               trackerList: tview.NewList(),
-               agreeModal:  tview.NewModal(),
-               HLClient:    c,
-       }
+       Inbox chan *Transaction
 }
 
-func (ui *UI) showBookmarks() *tview.List {
-       list := tview.NewList()
-       list.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
-               if event.Key() == tcell.KeyEsc {
-                       ui.Pages.SwitchToPage("home")
-               }
-               return event
-       })
-       list.Box.SetBorder(true).SetTitle("| Bookmarks |")
-
-       shortcut := 97 // rune for "a"
-       for i, srv := range ui.HLClient.pref.Bookmarks {
-               addr := srv.Addr
-               login := srv.Login
-               pass := srv.Password
-               list.AddItem(srv.Name, srv.Addr, rune(shortcut+i), func() {
-                       ui.Pages.RemovePage("joinServer")
-
-                       newJS := ui.renderJoinServerForm(addr, login, pass, "bookmarks", true, true)
-
-                       ui.Pages.AddPage("joinServer", newJS, true, true)
-               })
+func NewClient(cfgPath string, logger *zap.SugaredLogger) *Client {
+       c := &Client{
+               cfgPath:     cfgPath,
+               Logger:      logger,
+               activeTasks: make(map[uint32]*Transaction),
+               Handlers:    clientHandlers,
        }
+       c.UI = NewUI(c)
 
-       return list
-}
-
-func (ui *UI) getTrackerList() *tview.List {
-       listing, err := GetListing(ui.HLClient.pref.Tracker)
+       prefs, err := readConfig(cfgPath)
        if err != nil {
-               spew.Dump(err)
+               logger.Fatal(fmt.Sprintf("unable to read config file %s\n", cfgPath))
        }
+       c.pref = prefs
 
-       list := tview.NewList()
-       list.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
-               if event.Key() == tcell.KeyEsc {
-                       ui.Pages.SwitchToPage("home")
-               }
-               return event
-       })
-       list.Box.SetBorder(true).SetTitle("| Servers |")
-
-       shortcut := 97 // rune for "a"
-       for i, srv := range listing {
-               addr := srv.Addr()
-               list.AddItem(string(srv.Name), string(srv.Description), rune(shortcut+i), func() {
-                       ui.Pages.RemovePage("joinServer")
-
-                       newJS := ui.renderJoinServerForm(addr, GuestAccount, "", trackerListPage, false, true)
-
-                       ui.Pages.AddPage("joinServer", newJS, true, true)
-                       ui.Pages.ShowPage("joinServer")
-               })
-       }
-
-       return list
-}
-
-func (ui *UI) renderSettingsForm() *tview.Flex {
-       iconStr := strconv.Itoa(ui.HLClient.pref.IconID)
-       settingsForm := tview.NewForm()
-       settingsForm.AddInputField("Your Name", ui.HLClient.pref.Username, 0, nil, nil)
-       settingsForm.AddInputField("IconID", iconStr, 0, func(idStr string, _ rune) bool {
-               _, err := strconv.Atoi(idStr)
-               return err == nil
-       }, nil)
-       settingsForm.AddInputField("Tracker", ui.HLClient.pref.Tracker, 0, nil, nil)
-       settingsForm.AddButton("Save", func() {
-               usernameInput := settingsForm.GetFormItem(0).(*tview.InputField).GetText()
-               if len(usernameInput) == 0 {
-                       usernameInput = "unnamed"
-               }
-               ui.HLClient.pref.Username = usernameInput
-               iconStr = settingsForm.GetFormItem(1).(*tview.InputField).GetText()
-               ui.HLClient.pref.IconID, _ = strconv.Atoi(iconStr)
-               ui.HLClient.pref.Tracker = settingsForm.GetFormItem(2).(*tview.InputField).GetText()
-
-               out, err := yaml.Marshal(&ui.HLClient.pref)
-               if err != nil {
-                       // TODO: handle err
-               }
-               // TODO: handle err
-               _ = ioutil.WriteFile(clientConfigPath, out, 0666)
-               ui.Pages.RemovePage("settings")
-       })
-       settingsForm.SetBorder(true)
-       settingsForm.SetCancelFunc(func() {
-               ui.Pages.RemovePage("settings")
-       })
-       settingsPage := tview.NewFlex().SetDirection(tview.FlexRow)
-       settingsPage.Box.SetBorder(true).SetTitle("Settings")
-       settingsPage.AddItem(settingsForm, 0, 1, true)
-
-       centerFlex := tview.NewFlex().
-               AddItem(nil, 0, 1, false).
-               AddItem(tview.NewFlex().
-                       SetDirection(tview.FlexRow).
-                       AddItem(nil, 0, 1, false).
-                       AddItem(settingsForm, 15, 1, true).
-                       AddItem(nil, 0, 1, false), 40, 1, true).
-               AddItem(nil, 0, 1, false)
-
-       return centerFlex
+       return c
 }
 
 // DebugBuffer wraps a *tview.TextView and adds a Sync() method to make it available as a Zap logger
@@ -271,303 +124,15 @@ func (db *DebugBuffer) Sync() error {
        return nil
 }
 
-func (ui *UI) joinServer(addr, login, password string) error {
-       if err := ui.HLClient.JoinServer(addr, login, password); err != nil {
-               return errors.New(fmt.Sprintf("Error joining server: %v\n", err))
-       }
-
-       go func() {
-               err := ui.HLClient.ReadLoop()
-               if err != nil {
-                       ui.HLClient.Logger.Errorw("read error", "err", err)
-               }
-       }()
-       return nil
-}
-
-func (ui *UI) renderJoinServerForm(server, login, password, backPage string, save, defaultConnect bool) *tview.Flex {
-       joinServerForm := tview.NewForm()
-       joinServerForm.
-               AddInputField("Server", server, 0, nil, nil).
-               AddInputField("Login", login, 0, nil, nil).
-               AddPasswordField("Password", password, 0, '*', nil).
-               AddCheckbox("Save", save, func(checked bool) {
-                       // TODO: Implement bookmark saving
-               }).
-               AddButton("Cancel", func() {
-                       ui.Pages.SwitchToPage(backPage)
-               }).
-               AddButton("Connect", func() {
-                       err := ui.joinServer(
-                               joinServerForm.GetFormItem(0).(*tview.InputField).GetText(),
-                               joinServerForm.GetFormItem(1).(*tview.InputField).GetText(),
-                               joinServerForm.GetFormItem(2).(*tview.InputField).GetText(),
-                       )
-                       if err != nil {
-                               ui.HLClient.Logger.Errorw("login error", "err", err)
-                               loginErrModal := tview.NewModal().
-                                       AddButtons([]string{"Oh no"}).
-                                       SetText(err.Error()).
-                                       SetDoneFunc(func(buttonIndex int, buttonLabel string) {
-                                               ui.Pages.SwitchToPage(backPage)
-                                       })
-
-                               ui.Pages.AddPage("loginErr", loginErrModal, false, true)
-                       }
-
-                       // Save checkbox
-                       if joinServerForm.GetFormItem(3).(*tview.Checkbox).IsChecked() {
-                               // TODO: implement bookmark saving
-                       }
-               })
-
-       joinServerForm.Box.SetBorder(true).SetTitle("| Connect |")
-       joinServerForm.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
-               if event.Key() == tcell.KeyEscape {
-                       ui.Pages.SwitchToPage(backPage)
-               }
-               return event
-       })
-
-       if defaultConnect {
-               joinServerForm.SetFocus(5)
-       }
-
-       joinServerPage := tview.NewFlex().
-               AddItem(nil, 0, 1, false).
-               AddItem(tview.NewFlex().
-                       SetDirection(tview.FlexRow).
-                       AddItem(nil, 0, 1, false).
-                       AddItem(joinServerForm, 14, 1, true).
-                       AddItem(nil, 0, 1, false), 40, 1, true).
-               AddItem(nil, 0, 1, false)
-
-       return joinServerPage
-}
-
 func randomBanner() string {
        rand.Seed(time.Now().UnixNano())
 
-       bannerFiles, _ := bannerDir.ReadDir("client/banners")
-       file, _ := bannerDir.ReadFile("client/banners/" + bannerFiles[rand.Intn(len(bannerFiles))].Name())
+       bannerFiles, _ := bannerDir.ReadDir("banners")
+       file, _ := bannerDir.ReadFile("banners/" + bannerFiles[rand.Intn(len(bannerFiles))].Name())
 
        return fmt.Sprintf("\n\n\nWelcome to...\n\n[red::b]%s[-:-:-]\n\n", file)
 }
 
-func (ui *UI) renderServerUI() *tview.Flex {
-       commandList := tview.NewTextView().SetDynamicColors(true)
-       commandList.
-               SetText("[yellow]^n[-::]: Read News   [yellow]^p[-::]: Post News\n[yellow]^l[-::]: View Logs\n").
-               SetBorder(true).
-               SetTitle("Keyboard Shortcuts")
-
-       modal := tview.NewModal().
-               SetText("Disconnect from the server?").
-               AddButtons([]string{"Cancel", "Exit"}).
-               SetFocus(1)
-       modal.SetDoneFunc(func(buttonIndex int, buttonLabel string) {
-               if buttonIndex == 1 {
-                       _ = ui.HLClient.Disconnect()
-                       ui.Pages.SwitchToPage("home")
-               } else {
-                       ui.Pages.HidePage("modal")
-               }
-       })
-
-       serverUI := tview.NewFlex().
-               AddItem(tview.NewFlex().
-                       SetDirection(tview.FlexRow).
-                       AddItem(commandList, 4, 0, false).
-                       AddItem(ui.chatBox, 0, 8, false).
-                       AddItem(ui.chatInput, 3, 0, true), 0, 1, true).
-               AddItem(ui.userList, 25, 1, false)
-       serverUI.SetBorder(true).SetTitle("| Mobius - Connected to " + "TODO" + " |").SetTitleAlign(tview.AlignLeft)
-       serverUI.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
-               if event.Key() == tcell.KeyEscape {
-                       ui.Pages.AddPage("modal", modal, false, true)
-               }
-
-               // Show News
-               if event.Key() == tcell.KeyCtrlN {
-                       if err := ui.HLClient.Send(*NewTransaction(tranGetMsgs, nil)); err != nil {
-                               ui.HLClient.Logger.Errorw("err", "err", err)
-                       }
-               }
-
-               // Post news
-               if event.Key() == tcell.KeyCtrlP {
-
-                       newsFlex := tview.NewFlex()
-
-                       newsPostTextArea := tview.NewTextView()
-                       newsPostTextArea.SetBackgroundColor(tcell.ColorDimGray)
-                       newsPostTextArea.SetChangedFunc(func() {
-                               ui.App.Draw() // TODO: docs say this is bad but it's the only way to show content during initial render??
-                       })
-                       //newsPostTextArea.SetBorderPadding(0, 0, 1, 1)
-
-                       newsPostForm := tview.NewForm().
-                               SetButtonsAlign(tview.AlignRight).
-                               AddButton("Post", nil)
-                       newsPostForm.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
-                               switch event.Key() {
-                               case tcell.KeyTab:
-                                       ui.App.SetFocus(newsPostTextArea)
-                               case tcell.KeyEnter:
-                                       newsText := strings.ReplaceAll(newsPostTextArea.GetText(true), "\n", "\r")
-                                       err := ui.HLClient.Send(
-                                               *NewTransaction(tranOldPostNews, nil,
-                                                       NewField(fieldData, []byte(newsText)),
-                                               ),
-                                       )
-                                       if err != nil {
-                                               ui.HLClient.Logger.Errorw("Error posting news", "err", err)
-                                               // TODO: display errModal to user
-                                       }
-                                       //newsInput.SetText("") // clear the input field after chat send
-                                       ui.Pages.RemovePage("newsInput")
-                               }
-
-                               return event
-                       })
-
-                       newsFlex.
-                               SetDirection(tview.FlexRow).
-                               SetBorder(true).
-                               SetTitle("News Post")
-
-                       newsPostTextArea.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
-                               ui.HLClient.Logger.Infow("key", "key", event.Key(), "rune", event.Rune())
-                               switch event.Key() {
-                               case tcell.KeyEscape:
-                                       ui.Pages.RemovePage("newsInput")
-                               case tcell.KeyTab:
-                                       ui.App.SetFocus(newsPostForm)
-                               case tcell.KeyEnter:
-                                       fmt.Fprintf(newsPostTextArea, "\n")
-                               default:
-                                       switch event.Rune() {
-                                       case 127: // backspace
-                                               curTxt := newsPostTextArea.GetText(true)
-                                               if len(curTxt) > 0 {
-                                                       curTxt = curTxt[:len(curTxt)-1]
-                                                       newsPostTextArea.SetText(curTxt)
-                                               }
-                                       default:
-                                               fmt.Fprintf(newsPostTextArea, string(event.Rune()))
-                                       }
-                               }
-
-                               return event
-                       })
-
-                       newsFlex.AddItem(newsPostTextArea, 10, 0, true)
-                       newsFlex.AddItem(newsPostForm, 3, 0, false)
-
-                       newsPostPage := tview.NewFlex().
-                               AddItem(nil, 0, 1, false).
-                               AddItem(tview.NewFlex().
-                                       SetDirection(tview.FlexRow).
-                                       AddItem(nil, 0, 1, false).
-                                       AddItem(newsFlex, 15, 1, true).
-                                       //AddItem(newsPostForm, 3, 0, false).
-                                       AddItem(nil, 0, 1, false), 40, 1, false).
-                               AddItem(nil, 0, 1, false)
-
-                       ui.Pages.AddPage("newsInput", newsPostPage, true, true)
-                       ui.App.SetFocus(newsPostTextArea)
-               }
-
-               return event
-       })
-       return serverUI
-}
-
-func (ui *UI) Start() {
-       home := tview.NewFlex().SetDirection(tview.FlexRow)
-       home.Box.SetBorder(true).SetTitle("| Mobius v" + VERSION + " |").SetTitleAlign(tview.AlignLeft)
-       mainMenu := tview.NewList()
-
-       bannerItem := tview.NewTextView().
-               SetText(randomBanner()).
-               SetDynamicColors(true).
-               SetTextAlign(tview.AlignCenter)
-
-       home.AddItem(
-               tview.NewFlex().AddItem(bannerItem, 0, 1, false),
-               14, 1, false)
-       home.AddItem(tview.NewFlex().
-               AddItem(nil, 0, 1, false).
-               AddItem(mainMenu, 0, 1, true).
-               AddItem(nil, 0, 1, false),
-               0, 1, true,
-       )
-
-       mainMenu.AddItem("Join Server", "", 'j', func() {
-               joinServerPage := ui.renderJoinServerForm("", GuestAccount, "", "home", false, false)
-               ui.Pages.AddPage("joinServer", joinServerPage, true, true)
-       }).
-               AddItem("Bookmarks", "", 'b', func() {
-                       ui.Pages.AddAndSwitchToPage("bookmarks", ui.showBookmarks(), true)
-               }).
-               AddItem("Browse Tracker", "", 't', func() {
-                       ui.trackerList = ui.getTrackerList()
-                       ui.Pages.AddAndSwitchToPage("trackerList", ui.trackerList, true)
-               }).
-               AddItem("Settings", "", 's', func() {
-                       ui.Pages.AddPage("settings", ui.renderSettingsForm(), true, true)
-               }).
-               AddItem("Quit", "", 'q', func() {
-                       ui.App.Stop()
-               })
-
-       ui.Pages.AddPage("home", home, true, true)
-
-       // App level input capture
-       ui.App.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
-               if event.Key() == tcell.KeyCtrlC {
-                       ui.HLClient.Logger.Infow("Exiting")
-                       ui.App.Stop()
-                       os.Exit(0)
-               }
-               // Show Logs
-               if event.Key() == tcell.KeyCtrlL {
-                       ui.HLClient.DebugBuf.TextView.ScrollToEnd()
-                       ui.HLClient.DebugBuf.TextView.SetBorder(true).SetTitle("Logs")
-                       ui.HLClient.DebugBuf.TextView.SetDoneFunc(func(key tcell.Key) {
-                               if key == tcell.KeyEscape {
-                                       ui.Pages.RemovePage("logs")
-                               }
-                       })
-
-                       ui.Pages.AddAndSwitchToPage("logs", ui.HLClient.DebugBuf.TextView, true)
-               }
-               return event
-       })
-
-       if err := ui.App.SetRoot(ui.Pages, true).SetFocus(ui.Pages).Run(); err != nil {
-               ui.App.Stop()
-               os.Exit(1)
-       }
-}
-
-func NewClient(username string, logger *zap.SugaredLogger) *Client {
-       c := &Client{
-               Logger:      logger,
-               activeTasks: make(map[uint32]*Transaction),
-               Handlers:    clientHandlers,
-       }
-       c.UI = NewUI(c)
-
-       prefs, err := readConfig(clientConfigPath)
-       if err != nil {
-               return c
-       }
-       c.pref = prefs
-
-       return c
-}
-
 type clientTransaction struct {
        Name    string
        Handler func(*Client, *Transaction) ([]Transaction, error)
@@ -624,6 +189,136 @@ var clientHandlers = map[uint16]clientTHandler{
                Name:    "tranNotifyDeleteUser",
                Handler: handleGetMsgs,
        },
+       tranGetFileNameList: clientTransaction{
+               Name:    "tranGetFileNameList",
+               Handler: handleGetFileNameList,
+       },
+       tranServerMsg: clientTransaction{
+               Name:    "tranServerMsg",
+               Handler: handleTranServerMsg,
+       },
+       tranKeepAlive: clientTransaction{
+               Name: "tranKeepAlive",
+               Handler: func(client *Client, transaction *Transaction) (t []Transaction, err error) {
+                       return t, err
+               },
+       },
+}
+
+func handleTranServerMsg(c *Client, t *Transaction) (res []Transaction, err error) {
+       time := time.Now().Format(time.RFC850)
+
+       msg := strings.ReplaceAll(string(t.GetField(fieldData).Data), "\r", "\n")
+       msg += "\n\nAt " + time
+       title := fmt.Sprintf("| Private Message From:   %s |", t.GetField(fieldUserName).Data)
+
+       msgBox := tview.NewTextView().SetScrollable(true)
+       msgBox.SetText(msg).SetBackgroundColor(tcell.ColorDarkSlateBlue)
+       msgBox.SetTitle(title).SetBorder(true)
+       msgBox.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+               switch event.Key() {
+               case tcell.KeyEscape:
+                       c.UI.Pages.RemovePage("serverMsgModal" + time)
+               }
+               return event
+       })
+
+       centeredFlex := tview.NewFlex().
+               AddItem(nil, 0, 1, false).
+               AddItem(tview.NewFlex().SetDirection(tview.FlexRow).
+                       AddItem(nil, 0, 1, false).
+                       AddItem(msgBox, 0, 2, true).
+                       AddItem(nil, 0, 1, false), 0, 2, true).
+               AddItem(nil, 0, 1, false)
+
+       c.UI.Pages.AddPage("serverMsgModal"+time, centeredFlex, true, true)
+       c.UI.App.Draw() // TODO: errModal doesn't render without this.  wtf?
+
+       return res, err
+}
+
+func handleGetFileNameList(c *Client, t *Transaction) (res []Transaction, err error) {
+       fTree := tview.NewTreeView().SetTopLevel(1)
+       root := tview.NewTreeNode("Root")
+       fTree.SetRoot(root).SetCurrentNode(root)
+       fTree.SetBorder(true).SetTitle("| Files |")
+       fTree.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+               switch event.Key() {
+               case tcell.KeyEscape:
+                       c.UI.Pages.RemovePage("files")
+                       c.filePath = []string{}
+               case tcell.KeyEnter:
+                       selectedNode := fTree.GetCurrentNode()
+
+                       if selectedNode.GetText() == "<- Back" {
+                               c.filePath = c.filePath[:len(c.filePath)-1]
+                               f := NewField(fieldFilePath, EncodeFilePath(strings.Join(c.filePath, "/")))
+
+                               if err := c.UI.HLClient.Send(*NewTransaction(tranGetFileNameList, nil, f)); err != nil {
+                                       c.UI.HLClient.Logger.Errorw("err", "err", err)
+                               }
+                               return event
+                       }
+
+                       entry := selectedNode.GetReference().(*FileNameWithInfo)
+
+                       if bytes.Equal(entry.Type[:], []byte("fldr")) {
+                               c.Logger.Infow("get new directory listing", "name", string(entry.name))
+
+                               c.filePath = append(c.filePath, string(entry.name))
+                               f := NewField(fieldFilePath, EncodeFilePath(strings.Join(c.filePath, "/")))
+
+                               if err := c.UI.HLClient.Send(*NewTransaction(tranGetFileNameList, nil, f)); err != nil {
+                                       c.UI.HLClient.Logger.Errorw("err", "err", err)
+                               }
+                       } else {
+                               // TODO: initiate file download
+                               c.Logger.Infow("download file", "name", string(entry.name))
+                       }
+               }
+
+               return event
+       })
+
+       if len(c.filePath) > 0 {
+               node := tview.NewTreeNode("<- Back")
+               root.AddChild(node)
+       }
+
+       for _, f := range t.Fields {
+               var fn FileNameWithInfo
+               err = fn.UnmarshalBinary(f.Data)
+               if err != nil {
+                       return nil, nil
+               }
+
+               if bytes.Equal(fn.Type[:], []byte("fldr")) {
+                       node := tview.NewTreeNode(fmt.Sprintf("[blue::]📁 %s[-:-:-]", fn.name))
+                       node.SetReference(&fn)
+                       root.AddChild(node)
+               } else {
+                       size := binary.BigEndian.Uint32(fn.FileSize[:]) / 1024
+
+                       node := tview.NewTreeNode(fmt.Sprintf("   %-40s %10v KB", fn.name, size))
+                       node.SetReference(&fn)
+                       root.AddChild(node)
+               }
+
+       }
+
+       centerFlex := tview.NewFlex().
+               AddItem(nil, 0, 1, false).
+               AddItem(tview.NewFlex().
+                       SetDirection(tview.FlexRow).
+                       AddItem(nil, 0, 1, false).
+                       AddItem(fTree, 20, 1, true).
+                       AddItem(nil, 0, 1, false), 60, 1, true).
+               AddItem(nil, 0, 1, false)
+
+       c.UI.Pages.AddPage("files", centerFlex, true, true)
+       c.UI.App.Draw()
+
+       return res, err
 }
 
 func handleGetMsgs(c *Client, t *Transaction) (res []Transaction, err error) {
@@ -633,15 +328,14 @@ func handleGetMsgs(c *Client, t *Transaction) (res []Transaction, err error) {
        newsTextView := tview.NewTextView().
                SetText(newsText).
                SetDoneFunc(func(key tcell.Key) {
-                       c.UI.Pages.SwitchToPage("serverUI")
+                       c.UI.Pages.SwitchToPage(serverUIPage)
                        c.UI.App.SetFocus(c.UI.chatInput)
                })
        newsTextView.SetBorder(true).SetTitle("News")
 
        c.UI.Pages.AddPage("news", newsTextView, true, true)
-       c.UI.Pages.SwitchToPage("news")
-       c.UI.App.SetFocus(newsTextView)
-
+       // c.UI.Pages.SwitchToPage("news")
+       // c.UI.App.SetFocus(newsTextView)
        c.UI.App.Draw()
 
        return res, err
@@ -781,6 +475,7 @@ func (c *Client) renderUserList() {
                } else {
                        _, _ = fmt.Fprintf(c.UI.userList, "%s\n", u.Name)
                }
+               // TODO: fade if user is away
        }
 }
 
@@ -800,7 +495,7 @@ func handleClientTranShowAgreement(c *Client, t *Transaction) (res []Transaction
        agreement := string(t.GetField(fieldData).Data)
        agreement = strings.ReplaceAll(agreement, "\r", "\n")
 
-       c.UI.agreeModal = tview.NewModal().
+       agreeModal := tview.NewModal().
                SetText(agreement).
                AddButtons([]string{"Agree", "Disagree"}).
                SetDoneFunc(func(buttonIndex int, buttonLabel string) {
@@ -814,7 +509,6 @@ func handleClientTranShowAgreement(c *Client, t *Transaction) (res []Transaction
                                                NewField(fieldOptions, []byte{0x00, 0x00}),
                                        ),
                                )
-                               c.Agreed = true
                                c.UI.Pages.HidePage("agreement")
                                c.UI.App.SetFocus(c.UI.chatInput)
                        } else {
@@ -824,12 +518,8 @@ func handleClientTranShowAgreement(c *Client, t *Transaction) (res []Transaction
                },
                )
 
-       c.Logger.Debug("show agreement page")
-       c.UI.Pages.AddPage("agreement", c.UI.agreeModal, false, true)
+       c.UI.Pages.AddPage("agreement", agreeModal, false, true)
 
-       c.UI.Pages.ShowPage("agreement ")
-
-       c.UI.App.Draw()
        return res, err
 }
 
@@ -850,7 +540,7 @@ func handleClientTranLogin(c *Client, t *Transaction) (res []Transaction, err er
                c.Logger.Error(string(t.GetField(fieldError).Data))
                return nil, errors.New("login error: " + string(t.GetField(fieldError).Data))
        }
-       c.UI.Pages.AddAndSwitchToPage("serverUI", c.UI.renderServerUI(), true)
+       c.UI.Pages.AddAndSwitchToPage(serverUIPage, c.UI.renderServerUI(), true)
        c.UI.App.SetFocus(c.UI.chatInput)
 
        if err := c.Send(*NewTransaction(tranGetUserNameList, nil)); err != nil {
@@ -876,9 +566,20 @@ func (c *Client) JoinServer(address, login, passwd string) error {
                return err
        }
 
+       // start keepalive go routine
+       go func() { _ = c.keepalive() }()
+
        return nil
 }
 
+func (c *Client) keepalive() error {
+       for {
+               time.Sleep(300 * time.Second)
+               _ = c.Send(*NewTransaction(tranKeepAlive, nil))
+               c.Logger.Infow("Sent keepalive ping")
+       }
+}
+
 // connect establishes a connection with a Server by sending handshake sequence
 func (c *Client) connect(address string) error {
        var err error
@@ -902,10 +603,10 @@ var ServerHandshake = []byte{
 }
 
 func (c *Client) Handshake() error {
-       //Protocol ID   4       ‘TRTP’      0x54 52 54 50
-       //Sub-protocol ID       4               User defined
-       //Version       2       1       Currently 1
-       //Sub-version   2               User defined
+       // Protocol ID  4       ‘TRTP’      0x54 52 54 50
+       // Sub-protocol ID      4               User defined
+       // Version      2       1       Currently 1
+       // Sub-version  2               User defined
        if _, err := c.Connection.Write(ClientHandshake); err != nil {
                return fmt.Errorf("handshake write err: %s", err)
        }
@@ -916,12 +617,11 @@ func (c *Client) Handshake() error {
                return err
        }
 
-       //spew.Dump(replyBuf)
-       if bytes.Compare(replyBuf, ServerHandshake) == 0 {
+       if bytes.Equal(replyBuf, ServerHandshake) {
                return nil
        }
-       // In the case of an error, client and server close the connection.
 
+       // In the case of an error, client and server close the connection.
        return fmt.Errorf("handshake response err: %s", err)
 }
 
@@ -931,8 +631,8 @@ func (c *Client) LogIn(login string, password string) error {
                        tranLogin, nil,
                        NewField(fieldUserName, []byte(c.pref.Username)),
                        NewField(fieldUserIconID, c.pref.IconBytes()),
-                       NewField(fieldUserLogin, []byte(NegatedUserString([]byte(login)))),
-                       NewField(fieldUserPassword, []byte(NegatedUserString([]byte(password)))),
+                       NewField(fieldUserLogin, negateString([]byte(login))),
+                       NewField(fieldUserPassword, negateString([]byte(password))),
                        NewField(fieldVersion, []byte{0, 2}),
                ),
        )
@@ -942,7 +642,7 @@ func (c *Client) Send(t Transaction) error {
        requestNum := binary.BigEndian.Uint16(t.Type)
        tID := binary.BigEndian.Uint32(t.ID)
 
-       //handler := TransactionHandlers[requestNum]
+       // handler := TransactionHandlers[requestNum]
 
        // if transaction is NOT reply, add it to the list to transactions we're expecting a response for
        if t.IsReply == 0 {
@@ -951,7 +651,11 @@ func (c *Client) Send(t Transaction) error {
 
        var n int
        var err error
-       if n, err = c.Connection.Write(t.Payload()); err != nil {
+       b, err := t.MarshalBinary()
+       if err != nil {
+               return err
+       }
+       if n, err = c.Connection.Write(b); err != nil {
                return err
        }
        c.Logger.Debugw("Sent Transaction",
@@ -992,19 +696,6 @@ func (c *Client) HandleTransaction(t *Transaction) error {
        return nil
 }
 
-func (c *Client) Connected() bool {
-       fmt.Printf("Agreed: %v UserAccess: %v\n", c.Agreed, c.UserAccess)
-       // c.Agreed == true &&
-       if c.UserAccess != nil {
-               return true
-       }
-       return false
-}
-
 func (c *Client) Disconnect() error {
-       err := c.Connection.Close()
-       if err != nil {
-               return err
-       }
-       return nil
+       return c.Connection.Close()
 }