From 638a61e8abab5fbb524a7325d635368735c4f66a Mon Sep 17 00:00:00 2001
From: Gregory Eremin <g@erem.in>
Date: Thu, 11 Sep 2014 14:27:03 +0400
Subject: [PATCH] Hub cleanup

---
 hub/hub.go | 35 +++++++++++++++++++++++++++--------
 1 file changed, 27 insertions(+), 8 deletions(-)

diff --git a/hub/hub.go b/hub/hub.go
index 2487148..14d891c 100644
--- a/hub/hub.go
+++ b/hub/hub.go
@@ -1,6 +1,8 @@
 package hub
 
 import (
+	"sync"
+
 	"github.com/KosyanMedia/burlesque/storage"
 )
 
@@ -8,6 +10,7 @@ type (
 	Hub struct {
 		storage     *storage.Storage
 		subscribers []*Subscription
+		lock        sync.Mutex
 	}
 )
 
@@ -20,15 +23,14 @@ func New(st *storage.Storage) *Hub {
 
 func (h *Hub) Pub(queue string, msg []byte) bool {
 	for _, s := range h.subscribers {
-		if s.Queue == queue {
+		if ok := s.Need(queue); ok {
 			select {
 			case <-s.Done():
-				// FIXME: Cleanup needed
 				continue
 			default:
 			}
 
-			if ok := s.Send(msg); ok {
+			if ok := s.Send(Result{queue, msg}); ok {
 				return true
 			}
 		}
@@ -40,10 +42,27 @@ func (h *Hub) Pub(queue string, msg []byte) bool {
 }
 
 func (h *Hub) Sub(s *Subscription) {
-	if msg, ok := h.storage.Get(s.Queue); ok {
-		s.Send(msg)
-	} else {
-		// FIXME: Race condition
-		h.subscribers = append(h.subscribers, s)
+	for _, q := range s.Queues {
+		if msg, ok := h.storage.Get(q); ok {
+			s.Send(Result{q, msg})
+			return
+		}
+	}
+
+	h.subscribers = append(h.subscribers, s)
+}
+
+func (h *Hub) cleanup() {
+	h.lock.Lock()
+	defer h.lock.Unlock()
+
+	deleted := 0
+	for i, s := range h.subscribers {
+		select {
+		case <-s.Done():
+			h.subscribers = append(h.subscribers[:i-deleted], h.subscribers[i-deleted+1:]...)
+			deleted++
+		default:
+		}
 	}
 }