1 files changed, 63 insertions, 0 deletions
diff --git a/src/openvic-simulation/modifier/ModifierEffect.hpp b/src/openvic-simulation/modifier/ModifierEffect.hpp
new file mode 100644
index 0000000..ff82acf
--- /dev/null
+++ b/src/openvic-simulation/modifier/ModifierEffect.hpp
@@ -0,0 +1,63 @@
+#pragma once
+
+#include <string>
+#include <string_view>
+
+#include "openvic-simulation/types/EnumBitfield.hpp"
+#include "openvic-simulation/types/HasIdentifier.hpp"
+
+namespace OpenVic {
+	struct ModifierManager;
+
+	struct ModifierEffect : HasIdentifier {
+		friend struct ModifierManager;
+
+		enum class format_t : uint8_t {
+			PROPORTION_DECIMAL, /* An unscaled fraction/ratio, with 1 being "full"/"whole" */
+			PERCENTAGE_DECIMAL, /* A fraction/ratio scaled so that 100 is "full"/"whole" */
+			RAW_DECIMAL,        /* A continuous quantity, e.g. attack strength */
+			INT                 /* A discrete quantity, e.g. building count limit */
+		};
+
+		enum class target_t : uint8_t {
+			NO_TARGETS  = 0,
+			COUNTRY     = 1 << 0,
+			PROVINCE    = 1 << 1,
+			UNIT        = 1 << 2,
+			ALL_TARGETS = (1 << 3) - 1
+		};
+
+		static constexpr bool excludes_targets(target_t targets, target_t excluded_target);
+
+		static std::string target_to_string(target_t target);
+
+		static std::string make_default_modifier_effect_localisation_key(std::string_view identifier);
+
+	private:
+		/* If true, positive values will be green and negative values will be red.
+		 * If false, the colours will be switced.
+		 */
+		const bool PROPERTY_CUSTOM_PREFIX(positive_good, is);
+		const format_t PROPERTY(format);
+		const target_t PROPERTY(targets);
+		std::string PROPERTY(localisation_key);
+
+		// TODO - format/precision, e.g. 80% vs 0.8 vs 0.800, 2 vs 2.0 vs 200%
+
+		ModifierEffect(
+			std::string_view new_identifier, bool new_positive_good, format_t new_format, target_t mew_targets,
+			std::string_view new_localisation_key
+		);
+
+	public:
+		ModifierEffect(ModifierEffect&&) = default;
+	};
+
+	template<> struct enable_bitfield<ModifierEffect::target_t> : std::true_type {};
+
+	constexpr bool ModifierEffect::excludes_targets(target_t targets, target_t excluded_targets) {
+		using enum target_t;
+
+		return (targets & excluded_targets) == NO_TARGETS;
+	}
+}