func Handler(in <-chan nog.Message, out chan<- nog.Message) {
out <- nog.Message{What: "started"}
s := &Presence{}
var presenceChannel chan presence.Presence
go func() {
name := "presence.html"
if j, err := os.OpenFile(path.Join(Root, name), os.O_RDONLY, 0666); err == nil {
if b, err := ioutil.ReadAll(j); err == nil {
out <- nog.Message{What: string(b), Why: "template"}
} else {
log.Println("ERROR reading:", err)
}
} else {
log.Println("WARNING: could not open ", name, err)
}
}()
for {
select {
case m, ok := <-in:
if !ok {
goto done
}
if m.Why == "statechanged" {
dec := json.NewDecoder(strings.NewReader(m.What))
if err := dec.Decode(s); err != nil {
log.Println("presence decode err:", err)
}
if s.Present == nil {
s.Present = make(map[string]bool)
}
if presenceChannel == nil {
presenceChannel = presence.Listen(s.Present)
}
}
case p := <-presenceChannel:
if s.Present[p.Name] != p.Status {
s.Present[p.Name] = p.Status
var status string
if p.Status {
status = "home"
} else {
status = "away"
}
out <- nog.Message{What: p.Name + " is " + status}
if what, err := json.Marshal(s); err == nil {
out <- nog.Message{What: string(what), Why: "statechanged"}
} else {
log.Println("StateChanged err:", err)
}
}
}
}
done:
out <- nog.Message{What: "stopped"}
close(out)
}
func Handler(in <-chan nog.Message, out chan<- nog.Message) {
out <- nog.Message{What: "started"}
s := &Presence{}
var presenceChannel chan presence.Presence
go func() {
out <- nog.Template("presence")
}()
for {
select {
case m, ok := <-in:
if !ok {
goto done
}
if m.Why == "statechanged" {
dec := json.NewDecoder(strings.NewReader(m.What))
if err := dec.Decode(s); err != nil {
log.Println("presence decode err:", err)
}
if s.Present == nil {
s.Present = make(map[string]bool)
}
if presenceChannel == nil {
presenceChannel = presence.Listen(s.Present)
}
}
case p := <-presenceChannel:
if s.Present[p.Name] != p.Status {
s.Present[p.Name] = p.Status
var status string
if p.Status {
status = "home"
} else {
status = "away"
}
out <- nog.Message{What: p.Name + " is " + status}
if what, err := json.Marshal(s); err == nil {
out <- nog.Message{What: string(what), Why: "statechanged"}
} else {
log.Println("StateChanged err:", err)
}
}
}
}
done:
out <- nog.Message{What: "stopped"}
close(out)
}
