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|
package main
import (
"image/color"
"log"
"net"
"os"
"reflect"
"gioui.org/app"
"gioui.org/font/gofont"
"gioui.org/io/system"
"gioui.org/layout"
"gioui.org/op"
"gioui.org/text"
"gioui.org/unit"
"gioui.org/widget"
"gioui.org/widget/material"
)
type XmppEvent uint8
const (
XmppDisconnect XmppEvent = iota
XmppConnect
)
type GuiEvent uint8
const (
Disconnect GuiEvent = iota
)
type LimoxState uint8
const (
Disconnected LimoxState = iota
Connecting
Connected
)
type Limox struct {
JidEditor widget.Editor
PwdEditor widget.Editor
MainButton widget.Clickable
XmppEvents chan any
GuiEvents chan GuiEvent
State LimoxState
Window *app.Window
Operations op.Ops
Theme *material.Theme
}
func main() {
limox := NewLimox()
go func() {
err := limox.run()
if err != nil {
log.Fatal(err)
}
os.Exit(0)
}()
app.Main()
}
func NewLimox() Limox {
return Limox{
Window: app.NewWindow(
app.Title("LimoX"),
app.Size(unit.Dp(400), unit.Dp(600)),
),
Operations: op.Ops{},
Theme: material.NewTheme(gofont.Collection()),
XmppEvents: make(chan any),
GuiEvents: make(chan GuiEvent),
State: Disconnected,
}
}
func (l *Limox) run() error {
for {
select {
case e := <-l.Window.Events():
switch e := e.(type) {
case system.DestroyEvent:
return e.Err
case system.FrameEvent:
if l.MainButton.Clicked() {
l.buttonCallback()
}
l.draw(e)
}
case ev := <-l.XmppEvents:
switch ev.(type) {
case error:
log.Print(ev)
l.State = Disconnected
case XmppEvent:
switch ev {
case XmppDisconnect:
l.State = Disconnected
case XmppConnect:
l.State = Connected
default:
log.Fatalf("Unknown XmppEvent '%d'\n", ev)
}
default:
log.Fatalf("Unknown event type '%s'.\n", reflect.TypeOf(ev))
}
}
}
}
func (l *Limox) buttonCallback() {
switch l.State {
case Disconnected:
log.Println("Starting connection establishment")
go l.xmpp(l.JidEditor.Text(), l.PwdEditor.Text())
l.State = Connecting
case Connecting:
log.Println("Aborted connection establishment")
l.State = Disconnected
case Connected:
log.Println("Disconnected")
l.GuiEvents <- Disconnect
l.State = Disconnected
}
}
func (l *Limox) xmpp(jid string, pwd string) {
log.Printf("JID: '%s' PWD: '%s'\n", jid, pwd)
domain := domainpart(jid)
log.Printf("Domain: '%s'\n", domain)
tcpServer, err := net.ResolveTCPAddr("tcp", domain+":"+"5222")
if err != nil {
l.XmppEvents <- err
return
}
log.Printf("Server: %s\n", tcpServer)
conn, err := net.DialTCP("tcp", nil, tcpServer)
if err != nil {
l.XmppEvents <- err
return
}
l.XmppEvents <- XmppConnect
var closing bool = false
for {
ev := <-l.GuiEvents
switch ev {
case Disconnect:
closing = true
default:
log.Fatalf("Unknown GuiEvent '%d'!\n", ev)
}
if closing {
break
}
}
conn.Close()
l.XmppEvents <- XmppDisconnect
}
// domainpart extracts the domain name from a JID / XMPP address. See
// https://datatracker.ietf.org/doc/html/rfc7622#section-3.2 for details.
func domainpart(jid string) string {
list := []rune(jid)
for i, v := range list {
if v == '/' {
list = list[:i]
break
}
}
for i, v := range list {
if v == '@' {
list = list[i+1:]
break
}
}
return string(list)
}
func (l *Limox) draw(e system.FrameEvent) {
gtx := layout.NewContext(&l.Operations, e)
flex := layout.Flex{
Axis: layout.Vertical,
Spacing: layout.SpaceBetween,
}
flex.Layout(gtx,
layout.Rigid(
func(gtx layout.Context) layout.Dimensions {
h2 := material.H2(l.Theme, "LimoX")
h2.Color = color.NRGBA{R: 20, G: 20, B: 20, A: 255}
h2.Alignment = text.Middle
return h2.Layout(gtx)
},
),
layout.Rigid(
func(gtx layout.Context) layout.Dimensions {
jid := material.Editor(l.Theme, &l.JidEditor, "user@example.com")
jid.Editor.Alignment = text.Middle
return jid.Layout(gtx)
},
),
layout.Rigid(
func(gtx layout.Context) layout.Dimensions {
pwd := material.Editor(l.Theme, &l.PwdEditor, "mySafePassword")
pwd.Editor.Alignment = text.Middle
pwd.Editor.Mask = '*'
return pwd.Layout(gtx)
},
),
layout.Rigid(
func(gtx layout.Context) layout.Dimensions {
btn := material.Button(l.Theme, &l.MainButton,
l.buttonLabel())
return btn.Layout(gtx)
},
),
)
e.Frame(gtx.Ops)
}
func (l *Limox) buttonLabel() string {
var label string
switch l.State {
case Disconnected:
label = "Connect"
case Connecting:
label = "Abort"
case Connected:
label = "Disconnect"
default:
log.Fatalf("Unknown Limox state '%d'\n", l.State)
}
return label
}
|
