first working commit

main.go

@@ -0,0 +1,167 @@
+package main
+
+import (
+	"bufio"
+	"context"
+	"errors"
+	"fmt"
+	"math"
+	"net"
+	"os"
+	"sync"
+	"time"
+
+	"codeberg.org/lobo/nanite/widgets/pager"
+	"git.sr.ht/~rockorager/vaxis"
+	"git.sr.ht/~rockorager/vaxis/widgets/textinput"
+)
+
+var (
+	ErrAlreadyConnected = errors.New("already connected")
+)
+
+type App struct {
+	ctx  context.Context
+	stop context.CancelFunc
+	mu   sync.RWMutex
+
+	conn       net.Conn
+	scanner    *bufio.Scanner
+	host, port string
+
+	nick   string
+	last   int
+	ticker *time.Ticker
+
+	incoming chan IncomingEvent
+	outgoing chan OutgoingEvent
+
+	vx *vaxis.Vaxis
+	w  struct {
+		log, title, status, input vaxis.Window
+	}
+	pager *pager.Model
+	input *textinput.Model
+	dirty bool
+}
+
+func (app *App) Connect(host, port string) (err error) {
+	if app.conn != nil {
+		return ErrAlreadyConnected
+	}
+	app.host = host
+	app.port = port
+	app.conn, err = net.Dial("tcp", net.JoinHostPort(host, port))
+	if err != nil {
+		return err
+	}
+	app.scanner = bufio.NewScanner(app.conn)
+	app.incoming = make(chan IncomingEvent)
+	app.outgoing = make(chan OutgoingEvent)
+	app.ticker = time.NewTicker(2 * time.Second)
+
+	go func() {
+		for {
+			select {
+			case ev := <-app.outgoing:
+				ev.HandleOutgoing(app)
+			case <-app.ctx.Done():
+				return
+			}
+		}
+	}()
+
+	return nil
+}
+
+func (app *App) Disconnect() {
+	if app.conn != nil {
+		app.conn.Write([]byte("QUIT\n"))
+		app.conn.Close()
+		app.conn = nil
+	}
+}
+
+func (app *App) AppendMessage(data string) {
+	app.pager.Segments = append(app.pager.Segments,
+		vaxis.Segment{Text: data},
+		vaxis.Segment{Text: "\n"},
+	)
+	app.last += 1
+	app.pager.Offset = math.MaxInt
+	app.dirty = true
+}
+
+func (app *App) HandleTerminalEvent(ev vaxis.Event) {
+	app.dirty = true
+
+	switch ev := ev.(type) {
+	case vaxis.Resize:
+		app.resize()
+	case vaxis.Key:
+		if ev.MatchString("ctrl+c") {
+			app.stop()
+		}
+		switch {
+		case ev.MatchString("up"):
+			app.pager.ScrollUp()
+		case ev.MatchString("down"):
+			app.pager.ScrollDown()
+		case ev.MatchString("ctrl+l"):
+			app.Redraw()
+			app.vx.Refresh()
+			app.dirty = false
+		case ev.MatchString("enter"):
+			if len(app.input.Characters()) != 0 {
+				message := fmt.Sprintf("%s: %s", app.nick, app.input.String())
+				app.AppendMessage(message)
+				app.outgoing <- Message(message)
+				app.input.SetContent("")
+			}
+		}
+	}
+
+	app.input.Update(ev)
+}
+
+func main() {
+	args := os.Args
+	if len(args) < 2 || len(args) > 3 {
+		fmt.Printf("usage: %s host [port]\n", args[0])
+		os.Exit(1)
+	}
+
+	port := "44322"
+	if len(args) == 3 {
+		port = args[2]
+	}
+
+	app := App{}
+	app.ctx, app.stop = context.WithCancel(context.Background())
+	defer app.stop()
+
+	if err := app.Connect(args[1], port); err != nil {
+		panic(err)
+	}
+	defer app.Disconnect()
+
+	app.InitUI()
+	defer app.FinishUI()
+
+	app.nick = "wolfdog"
+	go app.Last(20)
+
+	for {
+		select {
+		case ev := <-app.vx.Events():
+			app.HandleTerminalEvent(ev)
+		case ev := <-app.incoming:
+			ev.HandleIncoming(&app)
+		case <-app.ticker.C:
+			app.outgoing <- Poll(app.last)
+		case <-app.ctx.Done():
+			return
+		}
+		app.Redraw()
+	}
+}