Extend onsusbcribe, onunsubscribe events

server/events/events.go

@@ -11,8 +11,8 @@ type Events struct {
 	OnError          // server error.
 	OnConnect        // client connected.
 	OnDisconnect     // client disconnected.
-	OnTopicSubscribe   // topic subscription created.
-	OnTopicUnsubscribe // topic subscription removed.
+	OnSubscribe      // topic subscription created.
+	OnUnsubscribe    // topic subscription removed.
 }
 
 // Packets is an alias for packets.Packet.
@@ -69,8 +69,8 @@ type OnDisconnect func(Client, error)
 // OnDisconnect are handled by the server.
 type OnError func(Client, error)
 
-// OnTopicSubscribe is called when a new subscription filter for a client is created.
-type OnTopicSubscribe func(filter string, client string, qos byte)
+// OnSubscribe is called when a new subscription filter for a client is created.
+type OnSubscribe func(filter string, cl Client, qos byte)
 
-// OnTopicUnsubscribe is called when an existing subscription filter for a client is removed.
-type OnTopicUnsubscribe func(filter string, client string)
+// OnUnsubscribe is called when an existing subscription filter for a client is removed.
+type OnUnsubscribe func(filter string, cl Client)

server/server.go

@@ -400,8 +400,8 @@ func (s *Server) unsubscribeClient(cl *clients.Client) {
 	for k := range cl.Subscriptions {
 		delete(cl.Subscriptions, k)
 		if s.Topics.Unsubscribe(k, cl.ID) {
-			if s.Events.OnTopicUnsubscribe != nil {
-				s.Events.OnTopicUnsubscribe(k, cl.ID)
+			if s.Events.OnUnsubscribe != nil {
+				s.Events.OnUnsubscribe(k, cl.Info())
 			}
 			atomic.AddInt64(&s.System.Subscriptions, -1)
 		}
@@ -738,10 +738,10 @@ func (s *Server) processSubscribe(cl *clients.Client, pk packets.Packet) error {
 		if !cl.AC.ACL(cl.Username, pk.Topics[i], false) {
 			retCodes[i] = packets.ErrSubAckNetworkError
 		} else {
-			q := s.Topics.Subscribe(pk.Topics[i], cl.ID, pk.Qoss[i])
-			if q {
-				if s.Events.OnTopicSubscribe != nil {
-					s.Events.OnTopicSubscribe(pk.Topics[i], cl.ID, pk.Qoss[i])
+			r := s.Topics.Subscribe(pk.Topics[i], cl.ID, pk.Qoss[i])
+			if r {
+				if s.Events.OnSubscribe != nil {
+					s.Events.OnSubscribe(pk.Topics[i], cl.Info(), pk.Qoss[i])
 				}
 				atomic.AddInt64(&s.System.Subscriptions, 1)
 			}
@@ -791,8 +791,8 @@ func (s *Server) processUnsubscribe(cl *clients.Client, pk packets.Packet) error
 	for i := 0; i < len(pk.Topics); i++ {
 		q := s.Topics.Unsubscribe(pk.Topics[i], cl.ID)
 		if q {
-			if s.Events.OnTopicUnsubscribe != nil {
-				s.Events.OnTopicUnsubscribe(pk.Topics[i], cl.ID)
+			if s.Events.OnUnsubscribe != nil {
+				s.Events.OnUnsubscribe(pk.Topics[i], cl.Info())
 			}
 			atomic.AddInt64(&s.System.Subscriptions, -1)
 		}
@@ -1014,12 +1014,12 @@ func (s *Server) loadServerInfo(v persistence.ServerInfo) {
 func (s *Server) loadSubscriptions(v []persistence.Subscription) {
 	for _, sub := range v {
 		if s.Topics.Subscribe(sub.Filter, sub.Client, sub.QoS) {
-			if s.Events.OnTopicSubscribe != nil {
-				s.Events.OnTopicSubscribe(sub.Filter, sub.Client, sub.QoS)
-			}
-		}
 			if cl, ok := s.Clients.Get(sub.Client); ok {
 				cl.NoteSubscription(sub.Filter, sub.QoS)
+				if s.Events.OnSubscribe != nil {
+					s.Events.OnSubscribe(sub.Filter, cl.Info(), sub.QoS)
+				}
+			}
 		}
 	}
 }

server/server_test.go

@@ -1946,6 +1946,15 @@ func TestServerProcessSubscribeInvalid(t *testing.T) {
 func TestServerProcessSubscribe(t *testing.T) {
 	s, cl, r, w := setupClient()
 
+	subscribeEvent := ""
+	subscribeClient := ""
+	s.Events.OnSubscribe = func(filter string, cl events.Client, qos byte) {
+		if filter == "a/b/c" {
+			subscribeEvent = "a/b/c"
+			subscribeClient = cl.ID
+		}
+	}
+
 	s.Topics.RetainMessage(packets.Packet{
 		FixedHeader: packets.FixedHeader{
 			Type:   packets.Publish,
@@ -1995,6 +2004,8 @@ func TestServerProcessSubscribe(t *testing.T) {
 	require.Equal(t, byte(1), cl.Subscriptions["d/e/f"])
 	require.Equal(t, topics.Subscriptions{cl.ID: 0}, s.Topics.Subscribers("a/b/c"))
 	require.Equal(t, topics.Subscriptions{cl.ID: 1}, s.Topics.Subscribers("d/e/f"))
+	require.Equal(t, "a/b/c", subscribeEvent)
+	require.Equal(t, cl.ID, subscribeClient)
 }
 
 func TestServerProcessSubscribeFailACL(t *testing.T) {
@@ -2114,6 +2125,16 @@ func TestServerProcessUnsubscribeInvalid(t *testing.T) {
 
 func TestServerProcessUnsubscribe(t *testing.T) {
 	s, cl, r, w := setupClient()
+
+	unsubscribeEvent := ""
+	unsubscribeClient := ""
+	s.Events.OnUnsubscribe = func(filter string, cl events.Client) {
+		if filter == "a/b/c" {
+			unsubscribeEvent = "a/b/c"
+			unsubscribeClient = cl.ID
+		}
+	}
+
 	s.Clients.Add(cl)
 	s.Topics.Subscribe("a/b/c", cl.ID, 0)
 	s.Topics.Subscribe("d/e/f", cl.ID, 1)
@@ -2155,6 +2176,9 @@ func TestServerProcessUnsubscribe(t *testing.T) {
 
 	require.NotEmpty(t, s.Topics.Subscribers("a/b/+"))
 	require.Contains(t, cl.Subscriptions, "a/b/+")
+
+	require.Equal(t, "a/b/c", unsubscribeEvent)
+	require.Equal(t, cl.ID, unsubscribeClient)
 }
 
 func TestServerProcessUnsubscribeWriteError(t *testing.T) {