func newBusyLight(d hid.Device, setcolorFn func(c color.Color)) *busylightDev {
closeChan := make(chan struct{})
colorChan := make(chan color.Color)
ticker := time.NewTicker(20 * time.Second) // If nothing is send after 30 seconds the device turns off.
go func() {
var curColor color.Color = color.Black
closed := false
for !closed {
select {
case <-ticker.C:
setcolorFn(curColor)
case col := <-colorChan:
curColor = col
setcolorFn(curColor)
case <-closeChan:
ticker.Stop()
setcolorFn(color.Black) // turn off device
d.Close()
closed = true
}
}
}()
return &busylightDev{closeChan: closeChan, colorChan: colorChan}
}
