func NewLedController(conn *ninja.Connection) (*LedController, error) {
s, err := util.GetLEDConnection()
if err != nil {
log.Fatalf("Failed to get connection to LED matrix: %s", err)
}
// Send a blank image to the led matrix
util.WriteLEDMatrix(image.NewRGBA(image.Rect(0, 0, 16, 16)), s)
controller := &LedController{
conn: conn,
pairingLayout: ui.NewPairingLayout(),
serial: s,
waiting: make(chan bool),
}
conn.MustExportService(controller, "$node/"+config.Serial()+"/led-controller", &model.ServiceAnnouncement{
Schema: "/service/led-controller",
})
conn.MustExportService(controller, "$home/led-controller", &model.ServiceAnnouncement{
Schema: "/service/led-controller",
})
if config.HasString("siteId") {
log.Infof("Have a siteId, checking if homecloud is running")
// If we have just started, and we have a site, and homecloud is running... enable control!
go func() {
siteModel := conn.GetServiceClient("$home/services/SiteModel")
for {
if controller.commandReceived {
log.Infof("Command has been received, stopping search for homecloud.")
break
}
err := siteModel.Call("fetch", config.MustString("siteId"), nil, time.Second*5)
if err != nil {
log.Infof("Fetched site to enableControl. Got err: %s", err)
} else if err == nil && !controller.commandReceived {
controller.EnableControl()
break
}
time.Sleep(time.Second * 5)
}
}()
}
return controller, nil
}
func (c *LedController) start(enableControl bool) {
c.controlRequested = enableControl
frameWritten := make(chan bool)
go func() {
fps.start()
for {
fps.tick()
if c.controlEnabled {
// Good to go
image, wake, err := c.controlLayout.Render()
if err != nil {
log.Fatalf("Unable to render()", err)
}
go func() {
util.WriteLEDMatrix(image, c.serial)
frameWritten <- true
}()
select {
case <-frameWritten:
// All good.
case <-time.After(10 * time.Second):
log.Infof("Timeout writing to LED matrix. Quitting.")
os.Exit(1)
}
if wake != nil {
log.Infof("Waiting as the UI is asleep")
select {
case <-wake:
log.Infof("UI woke up!")
case <-c.waiting:
log.Infof("Got a command from rpc...")
}
}
} else if c.controlRequested && !c.controlRendering {
// We want to display controls, so lets render the pane
c.controlRendering = true
go func() {
log.Infof("Starting control layout")
c.controlLayout = getPaneLayout(c.conn)
c.controlRendering = false
c.controlEnabled = true
log.Infof("Finished control layout")
}()
}
if c.controlRendering || !c.controlEnabled {
// We're either already controlling, or waiting for the pane to render
image, err := c.pairingLayout.Render()
if err != nil {
log.Fatalf("Unable to render()", err)
}
util.WriteLEDMatrix(image, c.serial)
}
}
}()
}