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package main
import (
"context"
"image/color"
"log"
"net"
"os"
"sync"
"gioui.org/app"
"gioui.org/layout"
"gioui.org/op"
"gioui.org/text"
"gioui.org/unit"
"gioui.org/widget"
"gioui.org/widget/material"
"xengineering.eu/soundbox"
)
func main() {
config, err := loadConfig()
if err != nil {
log.Fatal(err)
}
ui := NewUi(config)
go func() {
err := ui.Run()
if err != nil {
log.Fatal(err)
}
os.Exit(0)
}()
app.Main()
}
type State struct {
sync.Mutex
Config GlobalConfig
Theme *material.Theme
Title string
UrlEditor widget.Editor
PlayPauseButton widget.Clickable
PlayPauseButtonText string
PlayerContext context.Context
PlayerCancel context.CancelFunc
}
type Ui struct {
Window *app.Window
State State
}
func NewUi(config GlobalConfig) *Ui {
ui := Ui{}
ui.State.Config = config
ui.State.Theme = material.NewTheme()
ui.Window = new(app.Window)
ui.Window.Option(app.Title("soundbox app"))
ui.State.Title = "soundbox"
ui.State.PlayPauseButtonText = "Play"
return &ui
}
func (ui *Ui) Cleanup() {
ui.State.Lock()
defer ui.State.Unlock()
if ui.State.PlayerCancel != nil {
ui.State.PlayerCancel()
}
}
func (ui *Ui) Run() error {
defer ui.Cleanup()
var ops op.Ops
for {
switch e := ui.Window.Event().(type) {
case app.DestroyEvent:
return e.Err
case app.FrameEvent:
gtx := app.NewContext(&ops, e)
ui.HandleInputs(gtx)
ui.Layout(gtx)
e.Frame(gtx.Ops)
}
}
}
func (ui *Ui) HandleInputs(gtx layout.Context) {
ui.State.Lock()
defer ui.State.Unlock()
if ui.State.PlayPauseButton.Clicked(gtx) {
if ui.State.UrlEditor.ReadOnly {
ui.State.PlayerCancel()
} else {
ui.State.PlayerContext, ui.State.PlayerCancel = context.WithCancel(context.Background())
var targets []net.HardwareAddr
for _, entry := range ui.State.Config.Soundboxes {
targets = append(targets, net.HardwareAddr(entry.Mac))
}
go play(ui.State.PlayerContext, ui.State.UrlEditor.Text(), targets, ui)
}
}
}
func (ui *Ui) Layout(gtx layout.Context) layout.Dimensions {
ui.State.Lock()
defer ui.State.Unlock()
inset := layout.UniformInset(unit.Dp(10))
flex := layout.Flex{
Axis: layout.Vertical,
Spacing: layout.SpaceEnd,
}
h1 := material.H1(ui.State.Theme, ui.State.Title)
h1.Color = color.NRGBA{R: 88, G: 88, B: 88, A: 255}
h1.Alignment = text.Middle
editor := material.Editor(ui.State.Theme, &ui.State.UrlEditor, "Audio stream URL")
editor.Editor.Alignment = text.Middle
button := material.Button(ui.State.Theme, &ui.State.PlayPauseButton, ui.State.PlayPauseButtonText)
return inset.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
return flex.Layout(gtx,
layout.Rigid(h1.Layout),
layout.Rigid(layout.Spacer{Height: unit.Dp(25)}.Layout),
layout.Rigid(editor.Layout),
layout.Rigid(layout.Spacer{Height: unit.Dp(25)}.Layout),
layout.Rigid(button.Layout),
)
})
}
func play(ctx context.Context, url string, targets []net.HardwareAddr, ui *Ui) {
setPlayingState := func(isPlaying bool) {
ui.State.Lock()
defer ui.Window.Invalidate()
defer ui.State.Unlock()
ui.State.UrlEditor.ReadOnly = isPlaying
if isPlaying {
ui.State.PlayPauseButtonText = "Stop"
} else {
ui.State.PlayPauseButtonText = "Play"
}
}
setPlayingState(true)
defer setPlayingState(false)
err := soundbox.StreamURLContext(ctx, url, targets)
if err != nil {
log.Println(err)
}
}
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