[Character] Character EXP Modifiers in Memory (#3934)

* Cleanup

* Final push.

* Update zonedb.cpp

* Update zone.h

* Update exp.cpp

* Update zonedb.cpp

---------

Co-authored-by: Chris Miles <akkadius1@gmail.com>

common/repositories/base/base_character_exp_modifiers_repository.h

@@ -16,6 +16,7 @@
 #include "../../strings.h"
 #include <ctime>
 
+
 class BaseCharacterExpModifiersRepository {
 public:
 	struct CharacterExpModifiers {

common/repositories/character_exp_modifiers_repository.h

@@ -44,7 +44,61 @@ public:
      */
 
 	// Custom extended repository methods here
+	static EXPModifier GetEXPModifier(
+		Database& db,
+		uint32 character_id,
+		uint32 zone_id,
+		int16 instance_version
+	)
+	{
+		const auto& l = CharacterExpModifiersRepository::GetWhere(
+			db,
+			fmt::format(
+				SQL(
+					`character_id` = {} AND
+					(`zone_id` = {} OR `zone_id` = 0) AND
+					(`instance_version` = {} OR `instance_version` = -1)
+					ORDER BY `zone_id`, `instance_version` DESC
+					LIMIT 1
+				),
+				character_id,
+				zone_id,
+				instance_version
+			)
+		);
 
+		if (l.empty()) {
+			return EXPModifier{
+				.aa_modifier = 1.0f,
+				.exp_modifier = 1.0f
+			};
+		}
+
+		return EXPModifier{
+			.aa_modifier = l[0].aa_modifier,
+			.exp_modifier = l[0].exp_modifier
+		};
+	}
+
+	static void SetEXPModifier(
+		Database& db,
+		uint32 character_id,
+		uint32 zone_id,
+		int16 instance_version,
+		EXPModifier m
+	)
+	{
+		CharacterExpModifiersRepository::ReplaceOne(
+			db,
+			CharacterExpModifiersRepository::CharacterExpModifiers{
+				.character_id = static_cast<int32_t>(character_id),
+				.zone_id = static_cast<int32_t>(zone_id),
+				.instance_version = instance_version,
+				.aa_modifier = m.aa_modifier,
+				.exp_modifier = m.exp_modifier
+			}
+		);
+	}
 };
 
 #endif //EQEMU_CHARACTER_EXP_MODIFIERS_REPOSITORY_H