text: #pragma once
  
  #include <string>
  
  enum class OrderBookType{bid, ask, unknown};
  
  class OrderBookEntry
  {
      public:
  
          OrderBookEntry( double _price, 
                          double _amount, 
                          std::string _timestamp, 
                          std::string _product, 
                          OrderBookType _orderType);
  
          static OrderBookType stringToOrderBookType(std::string s);
          static bool compareByTimestamp(OrderBookEntry& entry1, OrderBookEntry& entry2)
          {
              return entry1.timestamp < entry2.timestamp;
          }
  
          double price;
          double amount;
          std::string timestamp;
          std::string product;
          OrderBookType orderType;
  };
   
  