Core/PacketIO: Implemented splash screen opcodes

Port From (https://github.com/TrinityCore/TrinityCore/commit/14b8d7d8393bb99ef66ec833bf89c3d6ce7683ab)

Source/Game/DataStorage/CliDB.cs

@@ -331,6 +331,7 @@ namespace Game.DataStorage
             UiMapAssignmentStorage = ReadDB2<UiMapAssignmentRecord>("UiMapAssignment.db2", HotfixStatements.SEL_UI_MAP_ASSIGNMENT);
             UiMapLinkStorage = ReadDB2<UiMapLinkRecord>("UiMapLink.db2", HotfixStatements.SEL_UI_MAP_LINK);
             UiMapXMapArtStorage = ReadDB2<UiMapXMapArtRecord>("UiMapXMapArt.db2", HotfixStatements.SEL_UI_MAP_X_MAP_ART);
+            UISplashScreenStorage = ReadDB2<UISplashScreenRecord>("UISplashScreen.db2", HotfixStatements.SEL_UI_SPLASH_SCREEN, HotfixStatements.SEL_UI_SPLASH_SCREEN_LOCALE);
             UnitPowerBarStorage = ReadDB2<UnitPowerBarRecord>("UnitPowerBar.db2", HotfixStatements.SEL_UNIT_POWER_BAR, HotfixStatements.SEL_UNIT_POWER_BAR_LOCALE);
             VehicleStorage = ReadDB2<VehicleRecord>("Vehicle.db2", HotfixStatements.SEL_VEHICLE);
             VehicleSeatStorage = ReadDB2<VehicleSeatRecord>("VehicleSeat.db2", HotfixStatements.SEL_VEHICLE_SEAT);
@@ -715,6 +716,7 @@ namespace Game.DataStorage
         public static DB6Storage<UiMapAssignmentRecord> UiMapAssignmentStorage;
         public static DB6Storage<UiMapLinkRecord> UiMapLinkStorage;
         public static DB6Storage<UiMapXMapArtRecord> UiMapXMapArtStorage;
+        public static DB6Storage<UISplashScreenRecord> UISplashScreenStorage;
         public static DB6Storage<UnitPowerBarRecord> UnitPowerBarStorage;
         public static DB6Storage<VehicleRecord> VehicleStorage;
         public static DB6Storage<VehicleSeatRecord> VehicleSeatStorage;

Source/Game/DataStorage/Structs/U_Records.cs

@@ -74,6 +74,26 @@ namespace Game.DataStorage
         public uint UiMapID;
     }
 
+    public sealed class UISplashScreenRecord
+    {
+        public uint Id;
+        public string Header;
+        public string TopLeftFeatureTitle;
+        public string TopLeftFeatureDesc;
+        public string BottomLeftFeatureTitle;
+        public string BottomLeftFeatureDesc;
+        public string RightFeatureTitle;
+        public string RightFeatureDesc;
+        public int AllianceQuestID;
+        public int HordeQuestID;
+        public sbyte ScreenType;
+        public int TextureKitID;
+        public int SoundKitID;
+        public int PlayerConditionID;
+        public int CharLevelConditionID;
+        public int RequiredTimeEventPassed; // serverside TimeEvent table, see ModifierTreeType::HasTimeEventPassed
+    }
+
     public sealed class UnitPowerBarRecord
     {
         public uint Id;

Source/Game/Handlers/MiscHandler.cs

@@ -464,6 +464,25 @@ namespace Game
                 Global.ScriptMgr.OnConversationLineStarted(convo, conversationLineStarted.LineID, _player);
         }
 
+        [WorldPacketHandler(ClientOpcodes.RequestLatestSplashScreen)]
+        void HandleRequestLatestSplashScreen(RequestLatestSplashScreen requestLatestSplashScreen)
+        {
+            UISplashScreenRecord splashScreen = null;
+            foreach (var itr in CliDB.UISplashScreenStorage.Values)
+            {
+                PlayerConditionRecord playerCondition = CliDB.PlayerConditionStorage.LookupByKey(itr.CharLevelConditionID);
+                if (playerCondition != null)
+                    if (!ConditionManager.IsPlayerMeetingCondition(_player, playerCondition))
+                        continue;
+
+                splashScreen = itr;
+            }
+
+            SplashScreenShowLatest splashScreenShowLatest = new();
+            splashScreenShowLatest.UISplashScreenID = splashScreen != null ? splashScreen.Id : 0;
+            SendPacket(splashScreenShowLatest);
+        }
+        
         [WorldPacketHandler(ClientOpcodes.ChatUnregisterAllAddonPrefixes)]
         void HandleUnregisterAllAddonPrefixes(ChatUnregisterAllAddonPrefixes packet)
         {

Source/Game/Networking/Packets/MiscPackets.cs

@@ -1263,6 +1263,25 @@ namespace Game.Networking.Packets
             LineID = _worldPacket.ReadUInt32();
         }
     }
+
+    class RequestLatestSplashScreen : ClientPacket
+    {
+        public RequestLatestSplashScreen(WorldPacket packet) : base(packet) { }
+
+        public override void Read() { }
+    }
+
+    class SplashScreenShowLatest : ServerPacket
+    {
+        public SplashScreenShowLatest() : base(ServerOpcodes.SplashScreenShowLatest, ConnectionType.Instance) { }
+
+        public override void Write()
+        {
+            _worldPacket.WriteUInt32(UISplashScreenID);
+        }
+
+        public uint UISplashScreenID;
+    }
     
     class DisplayGameError : ServerPacket
     {