Add diplomatic actions skeleton

Add AnyRef for cheap "move only" reference
Add FunctionRef for cheap "move only" function reference
	Based on https://github.com/think-cell/think-cell-library/blob/main/tc/base/ref.h

3 files changed, 289 insertions, 0 deletions

diff --git a/src/openvic-simulation/diplomacy/DiplomacyManager.hpp b/src/openvic-simulation/diplomacy/DiplomacyManager.hpp
new file mode 100644
index 0000000..c71bdbf
--- /dev/null
+++ b/src/openvic-simulation/diplomacy/DiplomacyManager.hpp
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "openvic-simulation/diplomacy/DiplomaticAction.hpp"
+
+namespace OpenVic {
+	class DiplomacyManager {
+		DiplomaticActionManager PROPERTY_REF(diplomatic_action_manager);
+	};
+}
diff --git a/src/openvic-simulation/diplomacy/DiplomaticAction.cpp b/src/openvic-simulation/diplomacy/DiplomaticAction.cpp
new file mode 100644
index 0000000..c1aa3df
--- /dev/null
+++ b/src/openvic-simulation/diplomacy/DiplomaticAction.cpp
@@ -0,0 +1,146 @@
+#include "DiplomaticAction.hpp"
+
+#include <string_view>
+#include <variant>
+
+#include "openvic-simulation/types/IdentifierRegistry.hpp"
+#include "openvic-simulation/utility/Logger.hpp"
+
+using namespace OpenVic;
+
+DiplomaticActionType::DiplomaticActionType(DiplomaticActionType::Initializer&& initializer)
+	: commit_action_caller { std::move(initializer.commit) },
+	  allowed_to_commit { std::move(initializer.allowed) }, get_acceptance { std::move(initializer.get_acceptance) } {}
+
+CancelableDiplomaticActionType::CancelableDiplomaticActionType(CancelableDiplomaticActionType::Initializer&& initializer)
+	: allowed_to_cancel{std::move(initializer.allowed_cancel)}, DiplomaticActionType(std::move(initializer)) {}
+
+
+DiplomaticActionManager::DiplomaticActionManager() {}
+
+bool DiplomaticActionManager::add_diplomatic_action(
+	std::string_view identifier, DiplomaticActionType::Initializer&& initializer
+) {
+	if (identifier.empty()) {
+		Logger::error("Invalid diplomatic action identifier - empty!");
+		return false;
+	}
+	return diplomatic_action_types.add_item({ identifier, DiplomaticActionType { std::move(initializer) } });
+}
+
+bool DiplomaticActionManager::add_cancelable_diplomatic_action(
+	std::string_view identifier, CancelableDiplomaticActionType::Initializer&& initializer
+) {
+	if (identifier.empty()) {
+		Logger::error("Invalid cancelable diplomatic action identifier - empty!");
+		return false;
+	}
+	return diplomatic_action_types.add_item({ identifier, CancelableDiplomaticActionType { std::move(initializer) } });
+}
+
+DiplomaticActionTickCache DiplomaticActionManager::create_diplomatic_action_tick(
+	std::string_view identifier, Country& sender, Country& reciever, std::any context_data
+) {
+	auto type = diplomatic_action_types.get_item_by_identifier(identifier);
+
+	DiplomaticActionTickCache result { { sender, reciever, context_data }, type };
+	type->visit([&](auto type) {
+		if ((result.allowed_to_commit = type.allowed_to_commit(result.argument))) {
+			result.acceptance = type.get_acceptance(result.argument);
+		}
+	});
+	
+	return result;
+}
+
+bool DiplomaticActionManager::setup_diplomatic_actions() {
+	using Argument = DiplomaticActionType::Argument;
+
+	bool result = true;
+
+	result &= add_diplomatic_action(
+		"form_alliance",
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"call_ally",
+		{
+			.commit = [](Argument& arg) {},
+			.allowed = [](const Argument& arg) { return false; },
+			.get_acceptance = [](const Argument& arg) { return 1; }
+		}
+	);
+	result &= add_cancelable_diplomatic_action(
+		"request_military_access",
+		{
+			.commit = [](Argument& arg) {},
+			.allowed_cancel = [](const Argument& arg) { return true; }
+		}
+	);
+	result &= add_diplomatic_action(
+		"give_military_access", 
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"increase_relations", 
+		{
+			.commit = [](Argument& arg) {},
+			.allowed = [](const Argument& arg) { return false; },
+		}
+	);
+	result &= add_diplomatic_action(
+		"decrease_relations", 
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"war_subsidies", 
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"declare_war", 
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"offer_peace", 
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"command_units", 
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"discredit", 
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"expel_advisors",
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"increase_opinion",
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"decrease_opinion",
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"add_to_sphere",
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"remove_from_sphere",
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"justify_war",
+		{ [](Argument& arg) {} }
+	);
+	result &= add_diplomatic_action(
+		"give_vision",
+		{ [](Argument& arg) {} }
+	);
+	diplomatic_action_types.lock();
+
+	return result;
+}
diff --git a/src/openvic-simulation/diplomacy/DiplomaticAction.hpp b/src/openvic-simulation/diplomacy/DiplomaticAction.hpp
new file mode 100644
index 0000000..7254510
--- /dev/null
+++ b/src/openvic-simulation/diplomacy/DiplomaticAction.hpp
@@ -0,0 +1,134 @@
+#pragma once
+
+#include <any>
+#include <concepts>
+#include <cstdint>
+#include <string_view>
+#include <type_traits>
+#include <variant>
+
+#include "openvic-simulation/country/Country.hpp"
+#include "openvic-simulation/types/FunctionRef.hpp"
+#include "openvic-simulation/types/IdentifierRegistry.hpp"
+
+namespace OpenVic {
+	struct DiplomaticActionType {
+		friend struct DiplomaticActionManager;
+		friend struct CancelableDiplomaticActionType;
+
+		struct Argument {
+			Country& sender;
+			Country& reciever;
+			std::any context_data;
+		};
+
+		using allowed_to_commit_func = FunctionRef<bool(const Argument&)>;
+		using get_acceptance_func = FunctionRef<std::int32_t(const Argument&)>;
+		using commit_action_func = FunctionRef<void(Argument&)>;
+
+		static bool allowed_to_commit_default(const Argument& argument) {
+			return true;
+		}
+
+		static std::int32_t get_acceptance_default(const Argument& argument) {
+			return 1;
+		}
+
+		struct Initializer {
+			commit_action_func commit;
+			allowed_to_commit_func allowed = allowed_to_commit_default;
+			get_acceptance_func get_acceptance = get_acceptance_default;
+		};
+
+		const commit_action_func commit_action_caller;
+		const allowed_to_commit_func allowed_to_commit = allowed_to_commit_default;
+		const get_acceptance_func get_acceptance = get_acceptance_default;
+
+		void commit_action(Argument& arg) const {
+			commit_action_caller(arg);
+		}
+
+	private:
+		DiplomaticActionType(Initializer&& initializer);
+	};
+
+	struct CancelableDiplomaticActionType : DiplomaticActionType {
+		friend struct DiplomaticActionManager;
+
+		using allowed_to_cancel_func = FunctionRef<bool(const Argument&)>;
+
+
+		static bool allowed_to_cancel_default(const Argument& argument) {
+			return true;
+		}
+
+		struct Initializer {
+			commit_action_func commit;
+			allowed_to_commit_func allowed = allowed_to_commit_default;
+			get_acceptance_func get_acceptance = get_acceptance_default;
+			allowed_to_cancel_func allowed_cancel = allowed_to_cancel_default;
+
+			operator DiplomaticActionType::Initializer() {
+				return {commit, allowed, get_acceptance};
+			}
+		};
+
+		const allowed_to_cancel_func allowed_to_cancel = allowed_to_cancel_default;
+
+	private:
+		CancelableDiplomaticActionType(Initializer&& initializer);
+	};
+
+	struct DiplomaticActionTickCache;
+
+	struct DiplomaticActionTypeStorage : std::variant<DiplomaticActionType, CancelableDiplomaticActionType>, HasIdentifier {
+		using base_type = std::variant<DiplomaticActionType, CancelableDiplomaticActionType>;
+
+		template<typename T>
+		constexpr DiplomaticActionTypeStorage(std::string_view identifier, T&& t) : HasIdentifier(identifier), base_type(t) {}
+
+		template<class Visitor>
+		constexpr decltype(auto) visit(Visitor&& vis){
+			return std::visit(std::forward<Visitor>(vis), *this);
+		}
+
+		template<class Visitor>
+		constexpr decltype(auto) visit(Visitor&& vis) const {
+			return std::visit(std::forward<Visitor>(vis), *this);
+		}
+
+		constexpr bool is_cancelable() const {
+			return visit([](auto&& arg) -> bool {
+				using T = std::decay_t<decltype(arg)>;
+				if constexpr(std::same_as<T, CancelableDiplomaticActionType>) {
+					return true;
+				} else {
+					return false;
+				}
+			});
+		}
+	};
+
+	struct DiplomaticActionTickCache {
+		DiplomaticActionType::Argument argument;
+		const DiplomaticActionTypeStorage* type;
+		bool allowed_to_commit;
+		std::int32_t acceptance = -1;
+	};
+
+	struct DiplomaticActionManager {
+	private:
+		IdentifierRegistry<DiplomaticActionTypeStorage> IDENTIFIER_REGISTRY(diplomatic_action_type);
+
+	public:
+		DiplomaticActionManager();
+
+		bool add_diplomatic_action(std::string_view identifier, DiplomaticActionType::Initializer&& initializer);
+		bool add_cancelable_diplomatic_action(std::string_view identifier, CancelableDiplomaticActionType::Initializer&& initializer);
+
+		DiplomaticActionTickCache
+		create_diplomatic_action_tick(std::string_view identifier, Country& sender, Country& reciever, std::any context_data);
+
+		bool setup_diplomatic_actions();
+	};
+}