1 files changed, 56 insertions, 0 deletions
diff --git a/src/openvic-simulation/map/MapInstance.hpp b/src/openvic-simulation/map/MapInstance.hpp
new file mode 100644
index 0000000..1f87326
--- /dev/null
+++ b/src/openvic-simulation/map/MapInstance.hpp
@@ -0,0 +1,56 @@
+#pragma once
+
+#include "openvic-simulation/map/ProvinceDefinition.hpp"
+#include "openvic-simulation/map/ProvinceInstance.hpp"
+#include "openvic-simulation/map/State.hpp"
+#include "openvic-simulation/types/Date.hpp"
+#include "openvic-simulation/types/IdentifierRegistry.hpp"
+
+namespace OpenVic {
+	struct MapDefinition;
+	struct BuildingTypeManager;
+	struct ProvinceHistoryManager;
+	struct IdeologyManager;
+	struct IssueManager;
+	struct Country;
+
+	/* REQUIREMENTS:
+	 * MAP-4
+	 */
+	struct MapInstance {
+		MapDefinition const& PROPERTY(map_definition);
+
+		IdentifierRegistry<ProvinceInstance> IDENTIFIER_REGISTRY_CUSTOM_INDEX_OFFSET(province_instance, 1);
+
+		ProvinceInstance* PROPERTY(selected_province); // is it right for this to be mutable? how about using an index instead?
+		Pop::pop_size_t PROPERTY(highest_province_population);
+		Pop::pop_size_t PROPERTY(total_map_population);
+
+		StateManager PROPERTY_REF(state_manager);
+
+	public:
+		MapInstance(MapDefinition const& new_map_definition);
+
+		inline explicit constexpr operator MapDefinition const&() const {
+			return map_definition;
+		}
+
+		IDENTIFIER_REGISTRY_NON_CONST_ACCESSORS_CUSTOM_INDEX_OFFSET(province_instance, 1);
+
+		ProvinceInstance* get_province_instance_from_const(ProvinceDefinition const* province);
+		ProvinceInstance const* get_province_instance_from_const(ProvinceDefinition const* province) const;
+
+		void set_selected_province(ProvinceDefinition::index_t index);
+		ProvinceInstance* get_selected_province();
+		ProvinceDefinition::index_t get_selected_province_index() const;
+
+		bool reset(BuildingTypeManager const& building_type_manager);
+		bool apply_history_to_provinces(
+			ProvinceHistoryManager const& history_manager, Date date, IdeologyManager const& ideology_manager,
+			IssueManager const& issue_manager, Country const& country
+		);
+
+		void update_gamestate(Date today);
+		void tick(Date today);
+	};
+}