[Respawns] Convert Respawn Times to Repositories (#3949)

* [Respawns] Convert Respawn Times to Repositories

- Convert `respawn_times` based methods to repositories.

* Missed some.

* Comments

common/repositories/base/base_respawn_times_repository.h

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

common/repositories/respawn_times_repository.h

@@ -44,7 +44,39 @@ public:
      */
 
 	// Custom extended repository methods here
+	static void ClearExpiredRespawnTimers(Database& db)
+	{
+		db.QueryDatabase(
+			fmt::format(
+				"DELETE FROM `{}` WHERE (`start` + `duration`) < UNIX_TIMESTAMP(NOW())",
+				TableName()
+			)
+		);
+	}
 
+	static uint32 GetTimeRemaining(Database& db, uint32 spawn2_id, uint16 instance_id, time_t time_seconds)
+	{
+		const auto& l = RespawnTimesRepository::GetWhere(
+			db,
+			fmt::format(
+				"`id` = {} AND `instance_id` = {}",
+				spawn2_id,
+				instance_id
+			)
+		);
+
+		if (l.empty()) {
+			return 0;
+		}
+
+		auto r = l.front();
+
+		if ((r.start + r.duration) <= time_seconds) {
+			return 0;
+		}
+
+		return ((r.start + r.duration) - time_seconds);
+	}
 };
 
 #endif //EQEMU_RESPAWN_TIMES_REPOSITORY_H