feat: add registration dictionary and Register method

CommandHook/CommandData.cs

@@ -6,14 +6,24 @@ public struct CommandData
 {
     public readonly IServerPlayer? Sender;
     public readonly string FullCommand;
-    public readonly bool IsPlayerCommand;
-    public bool Cancel;
+    public readonly string CommandName;
+    private byte _flags;
+
+    private const byte FlagIsPlayerCommand = 1 << 0;
+    private const byte FlagCancel = 1 << 1;
+
+    public bool IsPlayerCommand => (_flags & FlagIsPlayerCommand) != 0;
+    public bool Cancel
+    {
+        get => (_flags & FlagCancel) != 0;
+        set => _flags = value ? (byte)(_flags | FlagCancel) : (byte)(_flags & ~FlagCancel);
+    }
 
     public CommandData(IServerPlayer? sender, string fullCommand)
     {
-        Sender         = sender;
-        FullCommand    = fullCommand.Length > 0 ? fullCommand.Trim() : string.Empty;
-        IsPlayerCommand = sender != null;
-        Cancel         = false;
+        Sender = sender;
+        FullCommand = fullCommand.Length > 0 ? fullCommand.Trim() : string.Empty;
+        CommandName = FullCommand.Length > 1 ? FullCommand[1..].Split(' ')[0] : string.Empty;
+        _flags = sender != null ? FlagIsPlayerCommand : (byte)0;
     }
 }

CommandHook/CommandHookDelegate.cs

@@ -0,0 +1,3 @@
+namespace CommandHook;
+
+public delegate void CommandHookDelegate(ref CommandData data);

CommandHook/CommandHookModSystem.cs

@@ -1,14 +1,27 @@
-using Vintagestory.API.Server;
+using System.Collections.Generic;
 using Vintagestory.API.Common;
+using Vintagestory.API.Server;
 
 namespace CommandHook;
 
 public class CommandHookModSystem : ModSystem
 {
+    private readonly Dictionary<string, List<CommandRegistration>> _registrations = new();
+
     public override bool ShouldLoad(EnumAppSide forSide) => forSide == EnumAppSide.Server;
 
     public override void StartServerSide(ICoreServerAPI api)
     {
         Mod.Logger.Notification("[CommandHook] Loaded");
     }
+
+    public void Register(string modId, CommandRegistration registration)
+    {
+        if (!_registrations.TryGetValue(modId, out var list))
+        {
+            list = new List<CommandRegistration>();
+            _registrations[modId] = list;
+        }
+        list.Add(registration);
+    }
 }

CommandHook/CommandRegistration.cs

@@ -0,0 +1,19 @@
+namespace CommandHook;
+
+public struct CommandRegistration
+{
+    public readonly string CommandFilter;
+    public readonly CommandHookDelegate? Before;
+    public readonly CommandHookDelegate? After;
+
+    public CommandRegistration(
+        string commandFilter,
+        CommandHookDelegate? before,
+        CommandHookDelegate? after
+    )
+    {
+        CommandFilter = commandFilter;
+        Before = before;
+        After = after;
+    }
+}