- Added full implementation of lua event "modifyChatMessage" in IEvents.

Barotrauma/BarotraumaServer/ServerSource/Networking/GameServer.cs

@@ -3973,8 +3973,20 @@ namespace Barotrauma.Networking
             
             var hookChatMsg = ChatMessage.Create(senderName, message, (ChatMessageType)type, senderCharacter, senderClient, changeType);
 
-            var should = LuaCsSetup.Instance.Hook.Call<bool?>("modifyChatMessage", hookChatMsg, senderRadio);
+            bool shouldSkip = false;
+            LuaCsSetup.Instance.EventService.PublishEvent<IEventModifyChatMessage>(sub =>
+            {
+                if (sub.OnModifyMessagePredicate(hookChatMsg, senderRadio) is true)
+                {
+                    shouldSkip = true;
+                }
+            });
 
+            if (shouldSkip)
+            {
+                return;
+            }
+            
             //check which clients can receive the message and apply distance effects
             foreach (Client client in ConnectedClients)
             {

Barotrauma/BarotraumaShared/SharedSource/LuaCs/IEvents.cs

@@ -79,6 +79,39 @@ internal interface IEventSettingInstanceLifetime : IEvent<IEventSettingInstanceL
 
 #region GameEvents
 
+#if SERVER
+/// <summary>
+/// Allows the user to modify a chat message on the server before it is sent to clients, or reject the message altogether.
+/// </summary>
+/// <remarks>Legacy Lua Event Name: "modifyChatMessage"</remarks>
+internal interface IEventModifyChatMessage : IEvent<IEventModifyChatMessage>
+{
+    bool? OnModifyMessagePredicate(ChatMessage message, WifiComponent senderRadio);
+    
+    static IEventModifyChatMessage IEvent<IEventModifyChatMessage>.GetLuaRunner(IDictionary<string, LuaCsFunc> luaFunc) =>
+        new LuaWrapper(luaFunc);
+
+    public sealed class LuaWrapper : LuaWrapperBase, IEventModifyChatMessage
+    {
+        public LuaWrapper(IDictionary<string, LuaCsFunc> luaFuncs) : base(luaFuncs)
+        {
+        }
+        
+        /// <summary>
+        /// Called before a chat message is sent to clients.
+        /// </summary>
+        /// <param name="message">Message to be sent.</param>
+        /// <param name="senderRadio"><b>[CanBeNull]</b> The source <see cref="ItemComponent"/>, if any.</param>
+        /// <returns>Whether to <b><i>reject</i></b> the message.</returns>
+        public bool? OnModifyMessagePredicate(ChatMessage message, WifiComponent senderRadio)
+        {
+            return (bool?)LuaFuncs[nameof(OnModifyMessagePredicate)](message, senderRadio);
+        }
+    } 
+}
+
+#endif
+
 internal interface IEventAfflictionUpdate : IEvent<IEventAfflictionUpdate>
 {
     void OnAfflictionUpdate(Affliction affliction, CharacterHealth characterHealth, Limb targetLimb, float deltaTime);

Barotrauma/BarotraumaShared/SharedSource/LuaCs/_Services/LuaScriptManagementService.cs

@@ -312,6 +312,7 @@ class LuaScriptManagementService : ILuaScriptManagementService, ILuaDataService,
         // Compatibility
         _eventService.RegisterLuaEventAlias<IEventClientConnected>("clientConnected", nameof(IEventClientConnected.OnClientConnected));
         _eventService.RegisterLuaEventAlias<IEventClientDisconnected>("clientDisconnected", nameof(IEventClientDisconnected.OnClientDisconnected));
+        _eventService.RegisterLuaEventAlias<IEventModifyChatMessage>("modifyChatMessage", nameof(IEventModifyChatMessage.OnModifyMessagePredicate));
 #elif CLIENT
         _eventService.RegisterLuaEventAlias<IEventServerRawNetMessageReceived>("netMessageReceived", nameof(IEventServerRawNetMessageReceived.OnReceivedServerNetMessage));
 #endif