single socket call on topic enter

public/src/forum/topic.js

@@ -72,9 +72,7 @@ define('forum/topic', dependencies, function(pagination, infinitescroll, threadT
 
 		$(window).trigger('action:topic.loaded');
 
-		socket.emit('topics.markAsRead', tid);
-		socket.emit('topics.markTopicNotificationsRead', tid);
-		socket.emit('topics.increaseViewCount', tid);
+		socket.emit('topics.enter', tid);
 	};
 
 	Topic.toTop = function() {

src/socket.io/topics.js

@@ -54,6 +54,15 @@ SocketTopics.post = function(socket, data, callback) {
 	});
 };
 
+SocketTopics.enter = function(socket, tid, callback) {
+	if (!tid || !socket.uid) {
+		return;
+	}
+	SocketTopics.markAsRead(socket, tid);
+	topics.markTopicNotificationsRead(tid, socket.uid);
+	topics.increaseViewCount(tid);
+};
+
 SocketTopics.postcount = function(socket, tid, callback) {
 	topics.getTopicField(tid, 'postcount', callback);
 };