func (c WebSocket) RoomSocket(user string, ws *websocket.Conn) revel.Result {
// Join the room.
subscription := chatroom.Subscribe()
defer subscription.Cancel()
chatroom.Join(user)
defer chatroom.Leave(user)
// Send down the archive.
for _, event := range subscription.Archive {
if websocket.JSON.Send(ws, &event) != nil {
// They disconnected
return nil
}
}
// In order to select between websocket messages and subscription events, we
// need to stuff websocket events into a channel.
newMessages := make(chan string)
go func() {
var msg string
for {
err := websocket.Message.Receive(ws, &msg)
if err != nil {
close(newMessages)
return
}
newMessages <- msg
}
}()
// Now listen for new events from either the websocket or the chatroom.
for {
select {
case event := <-subscription.New:
if websocket.JSON.Send(ws, &event) != nil {
// They disconnected.
return nil
}
case msg, ok := <-newMessages:
// If the channel is closed, they disconnected.
if !ok {
return nil
}
// Otherwise, say something.
chatroom.Say(user, msg)
}
}
return nil
}
func (c Refresh) Index(user string) revel.Result {
chatroom.Join(user)
return c.Room(user)
}
func (c LongPolling) Room(user string) revel.Result {
chatroom.Join(user)
return c.Render(user)
}