Add Initial commit for insert and constraints

CM2005 Object Oriented Programming/Topic 5/5.1.7/OrderBookEntry.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <string>
+
+enum class OrderBookType{bid, ask, unknown, sale};
+
+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& e1, OrderBookEntry& e2)
+        {
+            return e1.timestamp < e2.timestamp;
+        }  
+        static bool compareByPriceAsc(OrderBookEntry& e1, OrderBookEntry& e2)
+        {
+            return e1.price < e2.price;
+        }
+         static bool compareByPriceDesc(OrderBookEntry& e1, OrderBookEntry& e2)
+        {
+            return e1.price > e2.price;
+        }
+
+        double price;
+        double amount;
+        std::string timestamp;
+        std::string product;
+        OrderBookType orderType;
+};