[DynamicZones] Bulk request dz member statuses on zone boot (#4769)

When dynamic zones are cached on zone boot each dz requests member
statuses from world separately. This causes a lot of network traffic
between world and booted zones when there are a lot of active dzs.

This changes it to make a single request to world on zone boot and a
single bulk reply back.

zone/dynamic_zone.cpp

@@ -25,6 +25,7 @@
 #include "worldserver.h"
 #include "../common/repositories/character_expedition_lockouts_repository.h"
 #include "../common/repositories/dynamic_zone_lockouts_repository.h"
+#include <cereal/types/utility.hpp>
 
 extern WorldServer worldserver;
 
@@ -162,14 +163,28 @@ void DynamicZone::CacheAllFromDatabase()
 			}
 		}
 
-		dz->UpdateMembers();
 		zone->dynamic_zone_cache.emplace(dz_id, std::move(dz));
 	}
 
+	if (!zone->dynamic_zone_cache.empty())
+	{
+		RequestMemberStatuses();
+	}
+
 	LogInfo("Loaded [{}] dynamic zone(s)", Strings::Commify(zone->dynamic_zone_cache.size()));
 	LogDynamicZones("Caching [{}] dynamic zone(s) took [{}s]", zone->dynamic_zone_cache.size(), bench.elapsed());
 }
 
+void DynamicZone::RequestMemberStatuses()
+{
+	ServerPacket pack(ServerOP_DzGetBulkMemberStatuses, sizeof(ServerDzCerealData_Struct));
+	auto buf = reinterpret_cast<ServerDzCerealData_Struct*>(pack.pBuffer);
+	buf->zone_id = static_cast<uint16_t>(zone->GetZoneID());
+	buf->inst_id = static_cast<uint16_t>(zone->GetInstanceID());
+
+	worldserver.SendPacket(&pack);
+}
+
 template <typename T>
 DynamicZone* FindDynamicZone(T pred)
 {
@@ -849,6 +864,34 @@ void DynamicZone::HandleWorldMessage(ServerPacket* pack)
 		}
 		break;
 	}
+	case ServerOP_DzGetBulkMemberStatuses:
+	{
+		if (zone)
+		{
+			std::vector<std::pair<uint32_t, std::vector<DynamicZoneMember>>> dzs;
+			dzs.reserve(zone->dynamic_zone_cache.size());
+
+			auto buf = reinterpret_cast<ServerDzCerealData_Struct*>(pack->pBuffer);
+			EQ::Util::MemoryStreamReader ss(buf->cereal_data, buf->cereal_size);
+			{
+				cereal::BinaryInputArchive archive(ss);
+				archive(dzs);
+			}
+
+			for (const auto& [dz_id, members] : dzs)
+			{
+				if (auto dz = DynamicZone::FindDynamicZoneByID(dz_id))
+				{
+					for (const auto& member : members)
+					{
+						dz->SetInternalMemberStatus(member.id, member.status);
+					}
+					dz->m_has_member_statuses = true;
+				}
+			}
+		}
+		break;
+	}
 	case ServerOP_DzUpdateMemberStatus:
 	{
 		auto buf = reinterpret_cast<ServerDzMemberStatus_Struct*>(pack->pBuffer);

zone/dynamic_zone.h

@@ -92,13 +92,13 @@ public:
 	void SendMemberNameToZoneMembers(const std::string& char_name, bool remove);
 	void SendMemberStatusToZoneMembers(const DynamicZoneMember& member);
 	void SetLocked(bool lock, bool update_db = false, DzLockMsg lock_msg = DzLockMsg::None, uint32_t color = Chat::Yellow);
-	void UpdateMembers();
 
 	std::string GetLootEvent(uint32_t id, DzLootEvent::Type type) const;
 	void SetLootEvent(uint32_t id, const std::string& event, DzLootEvent::Type type);
 
 private:
 	static void StartAllClientRemovalTimers();
+	static void RequestMemberStatuses();
 
 	uint16_t GetCurrentInstanceID() const override;
 	uint16_t GetCurrentZoneID() const override;
@@ -125,6 +125,7 @@ private:
 	void SendWorldPlayerInvite(const std::string& inviter, const std::string& swap_name, const std::string& add_name, bool pending = false);
 	void SetUpdatedDuration(uint32_t seconds);
 	void TryAddClient(Client* add_client, const std::string& inviter, const std::string& swap_name, Client* leader = nullptr);
+	void UpdateMembers();
 
 	std::unique_ptr<EQApplicationPacket> CreateExpireWarningPacket(uint32_t minutes_remaining);
 	std::unique_ptr<EQApplicationPacket> CreateInfoPacket(bool clear = false);

zone/worldserver.cpp

@@ -3410,6 +3410,7 @@ void WorldServer::HandleMessage(uint16 opcode, const EQ::Net::Packet &p)
 	case ServerOP_DzRemoveAllMembers:
 	case ServerOP_DzDurationUpdate:
 	case ServerOP_DzGetMemberStatuses:
+	case ServerOP_DzGetBulkMemberStatuses:
 	case ServerOP_DzSetCompass:
 	case ServerOP_DzSetSafeReturn:
 	case ServerOP_DzSetZoneIn: