misc: chore: Move the LDN constants into a SharedConstants class

src/Ryujinx.Common/SharedConstants.cs

+namespace Ryujinx.Common
+{
+    public static class SharedConstants
+    {
+        public const string DefaultLanPlayHost = "ryuldn.vudjun.com";
+        public const short LanPlayPort = 30456;
+        public const string DefaultLanPlayWebHost = "ryuldnweb.vudjun.com";
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/IUserLocalCommunicationService.cs

@@ -23,9 +23,6 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 {
     class IUserLocalCommunicationService : IpcService, IDisposable
     {
-        public static string DefaultLanPlayHost = "ryuldn.vudjun.com";
-        public static short LanPlayPort = 30456;
-
         public INetworkClient NetworkClient { get; private set; }
 
         private const int NifmRequestID = 90;
@@ -1092,20 +1089,18 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
                             case MultiplayerMode.LdnRyu:
                                 try
                                 {
-                                    string ldnServer = context.Device.Configuration.MultiplayerLdnServer;
-                                    if (string.IsNullOrEmpty(ldnServer))
-                                    {
-                                        ldnServer = DefaultLanPlayHost;
-                                    }
+                                    string ldnServer = context.Device.Configuration.MultiplayerLdnServer 
+                                                       ?? throw new InvalidOperationException("Cannot initialize RyuLDN with a null Multiplayer server.");
+
                                     if (!IPAddress.TryParse(ldnServer, out IPAddress ipAddress))
                                     {
                                         ipAddress = Dns.GetHostEntry(ldnServer).AddressList[0];
                                     }
-                                    NetworkClient = new LdnMasterProxyClient(ipAddress.ToString(), LanPlayPort, context.Device.Configuration);
+                                    NetworkClient = new LdnMasterProxyClient(ipAddress.ToString(), SharedConstants.LanPlayPort, context.Device.Configuration);
                                 }
                                 catch (Exception ex)
                                 {
-                                    Logger.Error?.Print(LogClass.ServiceLdn, "Could not locate LdnRyu server. Defaulting to stubbed wireless.");
+                                    Logger.Error?.Print(LogClass.ServiceLdn, "Could not locate RyuLDN server. Defaulting to stubbed wireless.");
                                     Logger.Error?.Print(LogClass.ServiceLdn, ex.Message);
                                     NetworkClient = new LdnDisabledClient();
                                 }

src/Ryujinx/AppHost.cs

@@ -951,7 +951,7 @@ namespace Ryujinx.Ava
                 ConfigurationState.Instance.Multiplayer.Mode,
                 ConfigurationState.Instance.Multiplayer.DisableP2p,
                 ConfigurationState.Instance.Multiplayer.LdnPassphrase,
-                ConfigurationState.Instance.Multiplayer.LdnServer,
+                ConfigurationState.Instance.Multiplayer.GetLdnServer(),
                 ConfigurationState.Instance.Graphics.CustomVSyncInterval.Value,
                 ConfigurationState.Instance.Hacks.ShowDirtyHacks ? ConfigurationState.Instance.Hacks.EnabledHacks : null));
         }

src/Ryujinx/Assets/locales.json

@@ -24073,4 +24073,4 @@
       }
     }
   ]
-}
+}
\ No newline at end of file

src/Ryujinx/Utilities/AppLibrary/ApplicationLibrary.cs

@@ -42,7 +42,6 @@ namespace Ryujinx.Ava.Utilities.AppLibrary
 {
     public class ApplicationLibrary
     {
-        public const string DefaultLanPlayWebHost = "ryuldnweb.vudjun.com";
         public Language DesiredLanguage { get; set; }
         public event EventHandler<ApplicationCountUpdatedEventArgs> ApplicationCountUpdated;
         public event Action<LdnGameDataReceivedEventArgs> LdnGameDataReceived;
@@ -826,7 +825,6 @@ namespace Ryujinx.Ava.Utilities.AppLibrary
 
         public async Task RefreshLdn()
         {
-
             if (ConfigurationState.Instance.Multiplayer.Mode == MultiplayerMode.LdnRyu)
             {
                 try
@@ -834,33 +832,22 @@ namespace Ryujinx.Ava.Utilities.AppLibrary
                     string ldnWebHost = ConfigurationState.Instance.Multiplayer.LdnServer;
                     if (string.IsNullOrEmpty(ldnWebHost))
                     {
-                        ldnWebHost = DefaultLanPlayWebHost;
+                        ldnWebHost = SharedConstants.DefaultLanPlayWebHost;
                     }
-                    IEnumerable<LdnGameData> ldnGameDataArray = Array.Empty<LdnGameData>();
+                    
                     using HttpClient httpClient = new();
                     string ldnGameDataArrayString = await httpClient.GetStringAsync($"https://{ldnWebHost}/api/public_games");
-                    ldnGameDataArray = JsonHelper.Deserialize(ldnGameDataArrayString, _ldnDataSerializerContext.IEnumerableLdnGameData);
-                    LdnGameDataReceived?.Invoke(new LdnGameDataReceivedEventArgs
-                    {
-                        LdnData = ldnGameDataArray
-                    });
+                    LdnGameData[] ldnGameDataArray = JsonHelper.Deserialize(ldnGameDataArrayString, _ldnDataSerializerContext.IEnumerableLdnGameData).ToArray();
+                    LdnGameDataReceived?.Invoke(new LdnGameDataReceivedEventArgs(ldnGameDataArray));
+                    return;
                 }
                 catch (Exception ex)
                 {
                     Logger.Warning?.Print(LogClass.Application, $"Failed to fetch the public games JSON from the API. Player and game count in the game list will be unavailable.\n{ex.Message}");
-                    LdnGameDataReceived?.Invoke(new LdnGameDataReceivedEventArgs
-                    {
-                        LdnData = Array.Empty<LdnGameData>()
-                    });
                 }
             }
-            else
-            {
-                LdnGameDataReceived?.Invoke(new LdnGameDataReceivedEventArgs
-                {
-                    LdnData = Array.Empty<LdnGameData>()
-                });
-            }
+            
+            LdnGameDataReceived?.Invoke(LdnGameDataReceivedEventArgs.Empty);
         }
 
         // Replace the currently stored DLC state for the game with the provided DLC state.

src/Ryujinx/Utilities/AppLibrary/LdnGameDataReceivedEventArgs.cs

@@ -5,6 +5,14 @@ namespace Ryujinx.Ava.Utilities.AppLibrary
 {
     public class LdnGameDataReceivedEventArgs : EventArgs
     {
-        public IEnumerable<LdnGameData> LdnData { get; set; }
+        public static new readonly LdnGameDataReceivedEventArgs Empty = new(null);
+        
+        public LdnGameDataReceivedEventArgs(LdnGameData[] ldnData)
+        {
+            LdnData = ldnData ?? [];
+        }
+        
+        
+        public LdnGameData[] LdnData { get; set; }
     }
 }

src/Ryujinx/Utilities/Configuration/ConfigurationState.Model.cs

 using ARMeilleure;
 using Gommon;
+using Ryujinx.Ava.Utilities.AppLibrary;
 using Ryujinx.Ava.Utilities.Configuration.System;
 using Ryujinx.Ava.Utilities.Configuration.UI;
 using Ryujinx.Common;
@@ -647,6 +648,14 @@ namespace Ryujinx.Ava.Utilities.Configuration
             /// </summary>
             public ReactiveObject<string> LdnServer { get; private set; }
 
+            public string GetLdnServer()
+            {
+                string ldnServer = LdnServer;
+                return string.IsNullOrEmpty(ldnServer) 
+                    ? SharedConstants.DefaultLanPlayHost 
+                    : ldnServer;
+            }
+
             public MultiplayerSection()
             {
                 LanInterfaceId = new ReactiveObject<string>();