Adding a tui app that allows chat for an imported group

app/tui/main.go

@@ -0,0 +1,89 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"time"
+	"cwtch.im/cwtch/peer"
+	"github.com/marcusolsson/tui-go"
+	"io/ioutil"
+	"os"
+	"strings"
+)
+
+func main() {
+
+	log.SetOutput(ioutil.Discard)
+	peer := peer.NewCwtchPeer("cwtchbot")
+	groupID, err := peer.ImportGroup(os.Args[1])
+	peer.AcceptInvite(groupID)
+	group := peer.Profile.GetGroupByGroupID(groupID)
+	peer.JoinServer(group.GroupServer)
+
+	history := tui.NewVBox()
+	historyScroll := tui.NewScrollArea(history)
+	historyScroll.SetAutoscrollToBottom(true)
+
+	historyBox := tui.NewVBox(historyScroll)
+	historyBox.SetBorder(true)
+	historyBox.SetTitle("cwtch chat:" + group.GroupID + "@" + group.GroupServer)
+
+	input := tui.NewEntry()
+	input.SetFocused(true)
+	input.SetSizePolicy(tui.Expanding, tui.Maximum)
+
+	inputBox := tui.NewHBox(input)
+	inputBox.SetBorder(true)
+	inputBox.SetSizePolicy(tui.Expanding, tui.Maximum)
+
+	chat := tui.NewVBox(historyBox, inputBox)
+	chat.SetSizePolicy(tui.Expanding, tui.Expanding)
+
+	input.OnSubmit(func(e *tui.Entry) {
+		if strings.Trim(e.Text(), " ") != "" {
+			go peer.SendMessageToGroup(groupID, e.Text())
+			e.SetText("")
+		}
+	})
+
+	seen := make(map[string]bool)
+
+	root := tui.NewHBox(chat)
+
+	ui, err := tui.New(root)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	ui.SetKeybinding("Esc", func() { ui.Quit() })
+
+	go func() {
+		for {
+			group = peer.Profile.GetGroupByGroupID(groupID)
+			if group == nil {
+				log.Fatalf("group does not exist")
+			}
+			timeline := group.GetTimeline()
+			for _, m := range timeline {
+				old, _ := seen[string(m.Signature)]
+				if !old {
+
+					ui.Update(func() {
+						history.Append(tui.NewHBox(
+							tui.NewLabel(m.Timestamp.Format("15:04")),
+							tui.NewPadder(1, 0, tui.NewLabel(fmt.Sprintf("<%s>", m.PeerID))),
+							tui.NewLabel(m.Message),
+							tui.NewSpacer(),
+						))
+					})
+					seen[string(m.Signature)] = true
+				}
+			}
+			time.Sleep(time.Second * 5)
+		}
+	}()
+
+	if err := ui.Run(); err != nil {
+		log.Fatal(err)
+	}
+}