Make chat rate limits a general-purpose system.

Intending to use this with ahelps next.

Content.Server/Chat/Managers/ChatManager.RateLimit.cs

@@ -1,84 +1,41 @@
-using System.Runtime.InteropServices;
+using Content.Server.Players.RateLimiting;
 using Content.Shared.CCVar;
 using Content.Shared.Database;
-using Robust.Shared.Enums;
 using Robust.Shared.Player;
-using Robust.Shared.Timing;
 
 namespace Content.Server.Chat.Managers;
 
 internal sealed partial class ChatManager
 {
-    private readonly Dictionary<ICommonSession, RateLimitDatum> _rateLimitData = new();
+    private const string RateLimitKey = "Chat";
 
-    public bool HandleRateLimit(ICommonSession player)
+    private void RegisterRateLimits()
     {
-        ref var datum = ref CollectionsMarshal.GetValueRefOrAddDefault(_rateLimitData, player, out _);
-        var time = _gameTiming.RealTime;
-        if (datum.CountExpires < time)
-        {
-            // Period expired, reset it.
-            var periodLength = _configurationManager.GetCVar(CCVars.ChatRateLimitPeriod);
-            datum.CountExpires = time + TimeSpan.FromSeconds(periodLength);
-            datum.Count = 0;
-            datum.Announced = false;
-        }
-
-        var maxCount = _configurationManager.GetCVar(CCVars.ChatRateLimitCount);
-        datum.Count += 1;
-
-        if (datum.Count <= maxCount)
-            return true;
-
-        // Breached rate limits, inform admins if configured.
-        if (_configurationManager.GetCVar(CCVars.ChatRateLimitAnnounceAdmins))
-        {
-            if (datum.NextAdminAnnounce < time)
+        _rateLimitManager.Register(RateLimitKey,
+            new RateLimitRegistration
             {
-                SendAdminAlert(Loc.GetString("chat-manager-rate-limit-admin-announcement", ("player", player.Name)));
-                var delay = _configurationManager.GetCVar(CCVars.ChatRateLimitAnnounceAdminsDelay);
-                datum.NextAdminAnnounce = time + TimeSpan.FromSeconds(delay);
-            }
-        }
-
-        if (!datum.Announced)
-        {
-            DispatchServerMessage(player, Loc.GetString("chat-manager-rate-limited"), suppressLog: true);
-            _adminLogger.Add(LogType.ChatRateLimited, LogImpact.Medium, $"Player {player} breached chat rate limits");
-
-            datum.Announced = true;
-        }
-
-        return false;
+                CVarLimitPeriodLength = CCVars.ChatRateLimitPeriod,
+                CVarLimitCount = CCVars.ChatRateLimitCount,
+                CVarAdminAnnounceDelay = CCVars.ChatRateLimitAnnounceAdminsDelay,
+                PlayerLimitedAction = RateLimitPlayerLimited,
+                AdminAnnounceAction = RateLimitAlertAdmins,
+                AdminLogType = LogType.Unknown,
+            });
     }
 
-    private void PlayerStatusChanged(object? sender, SessionStatusEventArgs e)
+    private void RateLimitPlayerLimited(ICommonSession player)
     {
-        if (e.NewStatus == SessionStatus.Disconnected)
-            _rateLimitData.Remove(e.Session);
+        DispatchServerMessage(player, Loc.GetString("chat-manager-rate-limited"), suppressLog: true);
     }
 
-    private struct RateLimitDatum
+    private void RateLimitAlertAdmins(ICommonSession player)
     {
-        /// <summary>
-        /// Time stamp (relative to <see cref="IGameTiming.RealTime"/>) this rate limit period will expire at.
-        /// </summary>
-        public TimeSpan CountExpires;
-
-        /// <summary>
-        /// How many messages have been sent in the current rate limit period.
-        /// </summary>
-        public int Count;
-
-        /// <summary>
-        /// Have we announced to the player that they've been blocked in this rate limit period?
-        /// </summary>
-        public bool Announced;
+        if (_configurationManager.GetCVar(CCVars.ChatRateLimitAnnounceAdmins))
+            SendAdminAlert(Loc.GetString("chat-manager-rate-limit-admin-announcement", ("player", player.Name)));
+    }
 
-        /// <summary>
-        /// Time stamp (relative to <see cref="IGameTiming.RealTime"/>) of the
-        /// next time we can send an announcement to admins about rate limit breach.
-        /// </summary>
-        public TimeSpan NextAdminAnnounce;
+    public RateLimitStatus HandleRateLimit(ICommonSession player)
+    {
+        return _rateLimitManager.CountAction(player, RateLimitKey);
     }
 }

Content.Server/Chat/Managers/ChatManager.cs

@@ -5,18 +5,17 @@
 using Content.Server.Administration.Managers;
 using Content.Server.Administration.Systems;
 using Content.Server.MoMMI;
+using Content.Server.Players.RateLimiting;
 using Content.Server.Preferences.Managers;
 using Content.Shared.Administration;
 using Content.Shared.CCVar;
 using Content.Shared.Chat;
 using Content.Shared.Database;
 using Content.Shared.Mind;
-using Robust.Server.Player;
 using Robust.Shared.Configuration;
 using Robust.Shared.Network;
 using Robust.Shared.Player;
 using Robust.Shared.Replays;
-using Robust.Shared.Timing;
 using Robust.Shared.Utility;
 
 namespace Content.Server.Chat.Managers
@@ -43,8 +42,7 @@ internal sealed partial class ChatManager : IChatManager
         [Dependency] private readonly IConfigurationManager _configurationManager = default!;
         [Dependency] private readonly INetConfigurationManager _netConfigManager = default!;
         [Dependency] private readonly IEntityManager _entityManager = default!;
-        [Dependency] private readonly IGameTiming _gameTiming = default!;
-        [Dependency] private readonly IPlayerManager _playerManager = default!;
+        [Dependency] private readonly PlayerRateLimitManager _rateLimitManager = default!;
 
         /// <summary>
         /// The maximum length a player-sent message can be sent
@@ -64,7 +62,7 @@ public void Initialize()
             _configurationManager.OnValueChanged(CCVars.OocEnabled, OnOocEnabledChanged, true);
             _configurationManager.OnValueChanged(CCVars.AdminOocEnabled, OnAdminOocEnabledChanged, true);
 
-            _playerManager.PlayerStatusChanged += PlayerStatusChanged;
+            RegisterRateLimits();
         }
 
         private void OnOocEnabledChanged(bool val)
@@ -206,7 +204,7 @@ public void SendHookOOC(string sender, string message)
         /// <param name="type">The type of message.</param>
         public void TrySendOOCMessage(ICommonSession player, string message, OOCChatType type)
         {
-            if (!HandleRateLimit(player))
+            if (HandleRateLimit(player) != RateLimitStatus.Allowed)
                 return;
 
             // Check if message exceeds the character limit

Content.Server/Chat/Managers/IChatManager.cs

@@ -1,4 +1,6 @@
 using System.Diagnostics.CodeAnalysis;
+using Content.Server.Players;
+using Content.Server.Players.RateLimiting;
 using Content.Shared.Administration;
 using Content.Shared.Chat;
 using Robust.Shared.Network;
@@ -50,6 +52,6 @@ void ChatMessageToMany(ChatChannel channel, string message, string wrappedMessag
         /// </summary>
         /// <param name="player">The player sending a chat message.</param>
         /// <returns>False if the player has violated rate limits and should be blocked from sending further messages.</returns>
-        bool HandleRateLimit(ICommonSession player);
+        RateLimitStatus HandleRateLimit(ICommonSession player);
     }
 }

Content.Server/Chat/Systems/ChatSystem.cs

@@ -6,6 +6,7 @@
 using Content.Server.Chat.Managers;
 using Content.Server.Examine;
 using Content.Server.GameTicking;
+using Content.Server.Players.RateLimiting;
 using Content.Server.Speech.Components;
 using Content.Server.Speech.EntitySystems;
 using Content.Server.Station.Components;
@@ -183,7 +184,7 @@ public void TrySendInGameICMessage(
             return;
         }
 
-        if (player != null && !_chatManager.HandleRateLimit(player))
+        if (player != null && _chatManager.HandleRateLimit(player) != RateLimitStatus.Allowed)
             return;
 
         // Sus
@@ -272,7 +273,7 @@ public void TrySendInGameOOCMessage(
         if (!CanSendInGame(message, shell, player))
             return;
 
-        if (player != null && !_chatManager.HandleRateLimit(player))
+        if (player != null && _chatManager.HandleRateLimit(player) != RateLimitStatus.Allowed)
             return;
 
         // It doesn't make any sense for a non-player to send in-game OOC messages, whereas non-players may be sending

Content.Server/Entry/EntryPoint.cs

@@ -14,8 +14,10 @@
 using Content.Server.IoC;
 using Content.Server.Maps;
 using Content.Server.NodeContainer.NodeGroups;
+using Content.Server.Players;
 using Content.Server.Players.JobWhitelist;
 using Content.Server.Players.PlayTimeTracking;
+using Content.Server.Players.RateLimiting;
 using Content.Server.Preferences.Managers;
 using Content.Server.ServerInfo;
 using Content.Server.ServerUpdates;
@@ -108,6 +110,7 @@ public override void Init()
                 _updateManager.Initialize();
                 _playTimeTracking.Initialize();
                 IoCManager.Resolve<JobWhitelistManager>().Initialize();
+                IoCManager.Resolve<PlayerRateLimitManager>().Initialize();
             }
         }
 

Content.Server/IoC/ServerContentIoC.cs

@@ -13,8 +13,10 @@
 using Content.Server.Maps;
 using Content.Server.MoMMI;
 using Content.Server.NodeContainer.NodeGroups;
+using Content.Server.Players;
 using Content.Server.Players.JobWhitelist;
 using Content.Server.Players.PlayTimeTracking;
+using Content.Server.Players.RateLimiting;
 using Content.Server.Preferences.Managers;
 using Content.Server.ServerInfo;
 using Content.Server.ServerUpdates;
@@ -63,6 +65,7 @@ public static void Register()
             IoCManager.Register<ISharedPlaytimeManager, PlayTimeTrackingManager>();
             IoCManager.Register<ServerApi>();
             IoCManager.Register<JobWhitelistManager>();
+            IoCManager.Register<PlayerRateLimitManager>();
         }
     }
 }