1 files changed, 83 insertions, 0 deletions
diff --git a/extension/src/openvic2/Date.hpp b/extension/src/openvic2/Date.hpp
new file mode 100644
index 0000000..841b118
--- /dev/null
+++ b/extension/src/openvic2/Date.hpp
@@ -0,0 +1,83 @@
+#pragma once
+
+#include <cstdint>
+#include <cstddef>
+#include <tuple>
+#include <string>
+#include <iostream>
+
+namespace OpenVic2 {
+	//A relative period between points in time, measured in days
+	struct Timespan {
+		int64_t days;
+
+		Timespan() : days(0) {}
+		Timespan(int64_t const& value) : days(value) {}
+
+		bool operator<  (Timespan const& other) const;
+		bool operator>  (Timespan const& other) const;
+		bool operator<= (Timespan const& other) const;
+		bool operator>= (Timespan const& other) const;
+		bool operator== (Timespan const& other) const;
+		bool operator!= (Timespan const& other) const;
+
+		Timespan operator+ (Timespan const& other) const;
+		Timespan operator- (Timespan const& other) const;
+		Timespan operator* (int64_t const& factor) const;
+		Timespan operator/ (int64_t const& factor) const;
+
+		Timespan& operator+= (Timespan const& other);
+		Timespan& operator-= (Timespan const& other);
+	};
+
+	static constexpr size_t MONTHS_IN_YEAR = 12;
+	static constexpr size_t DAYS_IN_YEAR = 365;
+	static constexpr size_t DAYS_IN_MONTH[MONTHS_IN_YEAR] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+
+	using date_t = uint8_t;
+	using month_t = uint8_t;
+	using year_t = uint16_t;
+	using YearMonthDayBundle = std::tuple<year_t, month_t, date_t>;
+
+	//Represents an in-game date
+	//Note: Current implementation does not account for leap-years, or dates before Year 0
+	struct Date {
+		private:
+		YearMonthDayBundle gregorianDate;
+		//Number of days since Jan 1st, Year 0
+		Timespan ts;
+
+		public:
+		//The Timespan is considered to be the number of days since Jan 1st, Year 0
+		Date(Timespan const& timespan);
+
+		//Year month day specification
+		Date(year_t year = 1836, month_t month = 1, date_t day = 1);
+
+		private:
+		void updateDate(Timespan const& timespan);
+
+		public:
+		size_t getDay() const;
+		size_t getMonth() const;
+		size_t getYear() const;
+
+		bool operator<  (Date const& other) const;
+		bool operator>  (Date const& other) const;
+		bool operator<= (Date const& other) const;
+		bool operator>= (Date const& other) const;
+		bool operator== (Date const& other) const;
+		bool operator!= (Date const& other) const;
+
+		Date operator+ (Timespan timespan) const;
+		Timespan operator- (Date const& other) const;
+
+		Date& operator+= (Timespan const& timespan);
+		Date& operator-= (Timespan const& timespan);
+		//Postfix increment
+		Date operator++ (int);
+
+		explicit operator std::string() const;
+		friend std::ostream& operator<< (std::ostream& out, Date const& date);
+	};
+}