To get the messages.

SocketHelper.swift

func getMessage(completion: @escaping (_ messageInfo: Message?) -> Void) {
        
        guard let socket = manager?.defaultSocket else {
            return
        }
        
        socket.on("newChatMessage") { (dataArray, socketAck) -> Void in
            
            var messageInfo = [String: Any]()
            
            guard let nickName = dataArray[0] as? String,
                let message = dataArray[1] as? String,
                let date = dataArray[2] as? String else{
                    return
            }
            
            messageInfo["nickname"] = nickName
            messageInfo["message"] = message
            messageInfo["date"] = date
            
            guard let data = UIApplication.jsonData(from: messageInfo) else {
                return
            }

            do {
                let messageModel = try JSONDecoder().decode(Message.self, from: data)
                completion(messageModel)
                
            } catch let error {
                print("Something happen wrong here...\(error)")
                completion(nil)
            }
        }
    }