#include "book.hpp"
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#include <chrono>
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#include <cstddef>
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#include <iostream>
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Order::Order(double price, OrderSideEnum side, int volume,
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std::chrono::nanoseconds timestamp, std::string id)
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: price{price}, side{side}, remaining_volume{volume},
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filled_volume(0), timestamp{timestamp}, id{id} {}
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Level::Level(Order &order)
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: price{order.price}, volume(order.remaining_volume), side{order.side},
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timestamp{order.timestamp}, id{order.id} {}
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bool operator<(const Level &a, const Level &b) {
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if (a.price < b.price)
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return true;
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else if (a.price == b.price && (a.timestamp.count() > b.timestamp.count()))
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return true;
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else
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return false;
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}
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bool operator>(const Level &a, const Level &b) {
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if (a.price > b.price)
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return true;
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else if (a.price == b.price && (a.timestamp.count() > b.timestamp.count()))
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return true;
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else
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return false;
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}
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bool operator<=(const Level &a, const Level &b) {
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if (a.price <= b.price)
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return true;
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else if (a.price == b.price && (a.timestamp.count() >= b.timestamp.count()))
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return true;
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else
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return false;
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}
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bool operator>=(const Level &a, const Level &b) {
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if (a.price >= b.price)
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return true;
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else if (a.price == b.price && (a.timestamp.count() >= b.timestamp.count()))
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return true;
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else
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return false;
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}
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bool operator==(const Level &a, const Level &b) {
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if (a.price == b.price && (a.timestamp.count() == b.timestamp.count()))
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return true;
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else
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return false;
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}
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std::ostream& operator<<(std::ostream& out, const Level& a)
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{
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return out << "Price: " << a.price << ", volume: " << a.volume << ", time: " << a.timestamp.count() << ", id: " << a.id;
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}
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template<class T>
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void Side<T>::deleteLevel(std::string orderId)
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{
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for (auto i = this->c.begin(); i != this->c.end();) {
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if (*i.id == orderId) {
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this->c.erase(i);
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std::make_heap(this->c.begin(), this->c.end(), this->comp);
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}
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}
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}
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template<class T>
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void Side<T>::topRemoveVolume(int volume) { this->c[0].volume -= volume; }
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template<class T>
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void Side<T>::printTop(std::size_t num)
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{
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std::vector<Level> copy(this->c);
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std::sort(copy.begin(), copy.end(), this->comp);
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if (copy.size() && copy[0].side == Buy)
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std::reverse(copy.begin(), copy.end());
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for (std::size_t i = 0; i < copy.size() && i < num; i++) {
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std::cout << copy[i] << std::endl;
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}
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}
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Book::Book()
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: bidSide(), askSide(), productType(TEST), product("a"), stationId("b"),
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unit("c"), expiry(std::chrono::nanoseconds(0)), aggFee(1), pasFee(-1),
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broFee(2) {}
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Book::Book(ProductTypeEnum productType, std::string product,
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std::string stationId, std::string unit,
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std::chrono::nanoseconds expiry, double aggFee, double pasFee,
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double broFee)
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: bidSide{}, askSide{}, productType{productType}, product(product),
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stationId(stationId), unit(unit), expiry(expiry), aggFee(aggFee),
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pasFee(pasFee), broFee(broFee) {}
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void Book::ask(Order &order) {
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while (this->bidSide.size() && this->bidSide.top().price >= order.price) {
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if (this->bidSide.top().volume > order.remaining_volume) {
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int temp = this->bidSide.top().volume;
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order.filled_volume += temp;
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this->bidSide.topRemoveVolume(order.remaining_volume);
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order.remaining_volume -= temp;
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break;
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} else {
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order.remaining_volume -= this->bidSide.top().volume;
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order.filled_volume += this->bidSide.top().volume;
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this->bidSide.pop();
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}
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}
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if (order.remaining_volume > 0) {
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this->askSide.emplace(order);
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}
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}
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void Book::bid(Order &order) {
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while (this->askSide.size() && this->askSide.top().price <= order.price) {
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if (this->askSide.top().volume > order.remaining_volume) {
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int temp = this->askSide.top().volume;
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order.filled_volume += temp;
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this->askSide.topRemoveVolume(order.remaining_volume);
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order.remaining_volume -= temp;
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break;
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} else {
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order.remaining_volume -= this->askSide.top().volume;
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order.filled_volume += this->askSide.top().volume;
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this->askSide.pop();
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}
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}
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if (order.remaining_volume > 0) {
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this->bidSide.emplace(order);
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}
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}
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void Book::printBook(std::size_t numOrders) {
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std::cout << "Sell side: " << this->askSide.size() << std::endl;
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this->askSide.printTop(numOrders);
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std::cout << "Buy side: " << this->bidSide.size() << std::endl;
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this->bidSide.printTop(numOrders);
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}
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Book testBook(int orders, bool printBook) {
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Book b = Book();
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std::chrono::nanoseconds time(1);
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for (int i = 1; i < orders; i++) {
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Order t(i, Buy, 10, time++, "a");
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b.bid(t);
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}
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for (int i = orders + 1; i < 2 * orders; i++) {
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Order t(i, Sell, 10, time++, "b");
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b.ask(t);
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}
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if (printBook)
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b.printBook(orders - 1);
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return b;
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}
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