command: register support topic/channel state

command.go

@@ -103,11 +103,14 @@ func Auth(secret string) (*Command, error) {
 	return &Command{[]byte("AUTH"), nil, []byte(secret)}, nil
 }
 
-// Register creates a new Command to add a topic/channel for the connected nsqd
-func Register(topic string, channel string) *Command {
-	params := [][]byte{[]byte(topic)}
-	if len(channel) > 0 {
-		params = append(params, []byte(channel))
+// Register creates a new Command to add a topic/channel with state for the connected nsqd
+func Register(topic string, channel string, states ...[]byte) *Command {
+	params := [][]byte{[]byte(topic), []byte(channel)}
+	if len(states) > 0 {
+		params = append(params, states[0]) //topic state
+		if len(states) > 1 {
+			params = append(params, states[1]) //channel state
+		}
 	}
 	return &Command{[]byte("REGISTER"), params, nil}
 }
@@ -121,6 +124,15 @@ func UnRegister(topic string, channel string) *Command {
 	return &Command{[]byte("UNREGISTER"), params, nil}
 }
 
+// SyncState creates a new Command to sync a topic/channel state changes, like paused, unpaused
+func SyncState(topic string, channel string, state []byte) *Command {
+	params := [][]byte{state, []byte(topic)}
+	if len(channel) > 0 {
+		params = append(params, []byte(channel))
+	}
+	return &Command{[]byte("SYNCSTATE"), params, nil}
+}
+
 // Ping creates a new Command to keep-alive the state of all the
 // announced topic/channels for a given client
 func Ping() *Command {