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CM2005 Object Oriented Programming/Midterm/Midterm Project/Wallet.cpp

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+#include "Wallet.h"
+#include <iostream>
+#include "CSVReader.h"
+
+Wallet::Wallet()
+{
+
+
+}
+
+void Wallet::insertCurrency(std::string type, double amount)
+{
+    double balance;
+    if (amount < 0)
+    {
+        throw std::exception{};
+    }
+    if (currencies.count(type) == 0) // not there yet
+    {
+        balance = 0;
+    }
+    else { // is there 
+        balance = currencies[type];
+    }
+    balance += amount; 
+    currencies[type] = balance; 
+}
+
+bool Wallet::removeCurrency(std::string type, double amount)
+{
+    if (amount < 0)
+    {
+        return false; 
+    }
+    if (currencies.count(type) == 0) // not there yet
+    {
+        //std::cout << "No currency for " << type << std::endl;
+        return false;
+    }
+    else { // is there - do  we have enough
+        if (containsCurrency(type, amount))// we have enough
+        {
+            //std::cout << "Removing " << type << ": " << amount << std::endl;
+            currencies[type] -= amount;
+            return true;
+        } 
+        else // they have it but not enough.
+            return false; 
+    }
+}
+
+bool Wallet::containsCurrency(std::string type, double amount)
+{
+    if (currencies.count(type) == 0) // not there yet
+        return false;
+    else 
+        return currencies[type] >= amount;
+    
+}
+
+std::string Wallet::toString()
+{
+    std::string s;
+    for (std::pair<std::string,double> pair : currencies)
+    {
+        std::string currency = pair.first;
+        double amount = pair.second;
+        s += currency + " : " + std::to_string(amount) + "\n";
+    }
+    return s;
+}
+
+bool Wallet::canFulfillOrder(OrderBookEntry order)
+{
+    std::vector<std::string> currs = CSVReader::tokenise(order.product, '/');
+    // ask
+    if (order.orderType == OrderBookType::ask)
+    {
+        double amount = order.amount;
+        std::string currency = currs[0];
+        std::cout << "Wallet::canFulfillOrder " << currency << " : " << amount << std::endl;
+
+        return containsCurrency(currency, amount);
+    }
+    // bid
+    if (order.orderType == OrderBookType::bid)
+    {
+        double amount = order.amount * order.price;
+        std::string currency = currs[1];
+        std::cout << "Wallet::canFulfillOrder " << currency << " : " << amount << std::endl;
+        return containsCurrency(currency, amount);
+    }
+
+
+    return false; 
+}
+      
+
+void Wallet::processSale(OrderBookEntry& sale)
+{
+    std::vector<std::string> currs = CSVReader::tokenise(sale.product, '/');
+    // ask
+    if (sale.orderType == OrderBookType::asksale)
+    {
+        double outgoingAmount = sale.amount;
+        std::string outgoingCurrency = currs[0];
+        double incomingAmount = sale.amount * sale.price;
+        std::string incomingCurrency = currs[1];
+
+        currencies[incomingCurrency] += incomingAmount;
+        currencies[outgoingCurrency] -= outgoingAmount;
+
+    }
+    // bid
+    if (sale.orderType == OrderBookType::bidsale)
+    {
+        double incomingAmount = sale.amount;
+        std::string incomingCurrency = currs[0];
+        double outgoingAmount = sale.amount * sale.price;
+        std::string outgoingCurrency = currs[1];
+
+        currencies[incomingCurrency] += incomingAmount;
+        currencies[outgoingCurrency] -= outgoingAmount;
+    }
+}
+std::ostream& operator<<(std::ostream& os,  Wallet& wallet)
+{
+    os << wallet.toString();
+    return os;
+}
+