first gocui chat version

TECH_STACK.md

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+# Použité technologie
+
+## GO
+
+- Klient aplikace pro uživatele a komunikace se serverem
+- <https://github.com/jroimartin/gocui> - vizuální stránka aplikace, nejde rendrovat obrázky
+- <https://github.com/rivo/tview> - vizuální stránka aplikace
+- <https://github.com/dolmen-go/kittyimg> - rendrování obrázků v terminálu
+  (profilové obrázky nebo posílané médium)
+
+## C
+
+- Pro rendrování a hashovací algoritmy v klient aplikaci embeded v go kodu
+
+## Java
+
+- Server pro komunikaci mezi uživateli

go.mod

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+module whspbrd
+
+go 1.24.2
+
+require github.com/jroimartin/gocui v0.5.0
+
+require (
+	github.com/dolmen-go/kittyimg v0.0.0-20250507221057-648811cc98ed
+	github.com/mattn/go-runewidth v0.0.9 // indirect
+	github.com/nsf/termbox-go v1.1.1 // indirect
+)

go.sum

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+github.com/dolmen-go/kittyimg v0.0.0-20250507221057-648811cc98ed h1:kDKSQ5o62eFce2771pkdTu6kjv4I3s5dFhe6gXgSeUg=
+github.com/dolmen-go/kittyimg v0.0.0-20250507221057-648811cc98ed/go.mod h1:2vk7ATPVcI7uW4Sh6PrSQvtO+Czmq8509xcg/y8Osd0=
+github.com/jroimartin/gocui v0.5.0 h1:DCZc97zY9dMnHXJSJLLmx9VqiEnAj0yh0eTNpuEtG/4=
+github.com/jroimartin/gocui v0.5.0/go.mod h1:l7Hz8DoYoL6NoYnlnaX6XCNR62G7J5FfSW5jEogzaxE=
+github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
+github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
+github.com/nsf/termbox-go v1.1.1 h1:nksUPLCb73Q++DwbYUBEglYBRPZyoXJdrj5L+TkjyZY=
+github.com/nsf/termbox-go v1.1.1/go.mod h1:T0cTdVuOwf7pHQNtfhnEbzHbcNyCEcVU4YPpouCbVxo=

main.go

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+package main
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+	"github.com/jroimartin/gocui"
+)
+
+var messages []string
+var users = []string{"Alice", "Bob", "Charlie"}
+
+func layout(g *gocui.Gui) error {
+	maxX, maxY := g.Size()
+
+	if v, err := g.SetView("users", 0, 0, 20, maxY-1); err != nil {
+		if err != gocui.ErrUnknownView {
+			return err
+		}
+		v.Title = "Users"
+		v.Clear()
+		for _, u := range users {
+			fmt.Fprintln(v, u)
+		}
+	}
+
+	if v, err := g.SetView("chat", 21, 0, maxX-1, maxY-5); err != nil {
+		if err != gocui.ErrUnknownView {
+			return err
+		}
+		v.Title = "Chat"
+		v.Wrap = true
+		updateChatView(v)
+	}
+
+	if v, err := g.SetView("input", 21, maxY-4, maxX-1, maxY-1); err != nil {
+		if err != gocui.ErrUnknownView {
+			return err
+		}
+		v.Title = "Type your message"
+		v.Editable = true
+		v.Wrap = true
+		if _, err := g.SetCurrentView("input"); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+func updateChatView(v *gocui.View) {
+	v.Clear()
+	for _, msg := range messages {
+		fmt.Fprintln(v, msg)
+	}
+}
+
+func sendMessage(g *gocui.Gui, v *gocui.View) error {
+	input := strings.TrimSpace(v.Buffer())
+	v.Clear()
+	v.SetCursor(0, 0)
+	v.SetOrigin(0, 0)
+
+	if input != "" {
+		messages = append(messages, "You: "+input)
+		if chatView, err := g.View("chat"); err == nil {
+			updateChatView(chatView)
+		}
+	}
+	v.Clear()
+	v.SetCursor(0, 0)
+	return nil
+}
+
+func keybindings(g *gocui.Gui) error {
+	// Ctrl+C to quit
+	if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
+		return err
+	}
+
+	// Enter to send message
+	// Enter adds a new line (multiline input)
+	if err := g.SetKeybinding("input", gocui.KeyArrowDown, gocui.ModNone, insertNewline); err != nil {
+		return err
+	}
+
+	// Ctrl+Enter sends the message
+	if err := g.SetKeybinding("input", gocui.KeyEnter, gocui.ModNone, sendMessage); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func insertNewline(g *gocui.Gui, v *gocui.View) error {
+	v.EditNewLine()
+	return nil
+}
+
+func quit(g *gocui.Gui, v *gocui.View) error {
+	return gocui.ErrQuit
+}
+
+func main() {
+	g, err := gocui.NewGui(gocui.OutputNormal)
+	if err != nil {
+		log.Panicln(err)
+	}
+	defer g.Close()
+
+	g.SetManagerFunc(layout)
+
+	if err := keybindings(g); err != nil {
+		log.Panicln(err)
+	}
+
+	if err := g.MainLoop(); err != nil && err != gocui.ErrQuit {
+		log.Panicln(err)
+	}
+}