do not handle blocked/muted characters

MareSynchronos/Interop/BlockedCharacterHandler.cs

@@ -0,0 +1,58 @@
+using Dalamud.Plugin.Services;
+using Dalamud.Utility.Signatures;
+using FFXIVClientStructs.FFXIV.Client.Game.Character;
+using FFXIVClientStructs.FFXIV.Client.UI.Info;
+using Microsoft.Extensions.Logging;
+
+namespace MareSynchronos.Interop;
+
+public unsafe class BlockedCharacterHandler
+{
+    private readonly Dictionary<(ulong, ulong), bool> _blockedCharacterCache = new();
+
+    private enum BlockResultType
+    {
+        NotBlocked = 1,
+        BlockedByAccountId = 2,
+        BlockedByContentId = 3,
+    }
+
+    [Signature("48 83 EC 48 F6 81 ?? ?? ?? ?? ?? 75 ?? 33 C0 48 83 C4 48")]
+    private readonly GetBlockResultTypeDelegate? _getBlockResultType = null;
+    private readonly ILogger<BlockedCharacterHandler> _logger;
+
+    private unsafe delegate BlockResultType GetBlockResultTypeDelegate(InfoProxyBlacklist* thisPtr, ulong accountId, ulong contentId);
+
+    public BlockedCharacterHandler(ILogger<BlockedCharacterHandler> logger, IGameInteropProvider gameInteropProvider)
+    {
+        gameInteropProvider.InitializeFromAttributes(this);
+        _logger = logger;
+    }
+
+    private static ulong GetAccIdFromPlayerPointer(nint ptr)
+    {
+        if (ptr == nint.Zero) return 0;
+        return ((BattleChara*)ptr)->Character.AccountId;
+    }
+
+    private static ulong GetContentIdFromPlayerPointer(nint ptr)
+    {
+        if (ptr == nint.Zero) return 0;
+        return ((BattleChara*)ptr)->Character.ContentId;
+    }
+
+    public bool IsCharacterBlocked(nint ptr)
+    {
+        (ulong AccId, ulong ContentId) combined = (GetAccIdFromPlayerPointer(ptr), GetContentIdFromPlayerPointer(ptr));
+        if (_blockedCharacterCache.TryGetValue(combined, out var isBlocked))
+            return isBlocked;
+
+        if (_getBlockResultType == null)
+            return _blockedCharacterCache[combined] = false;
+
+        var infoProxy = InfoProxyBlacklist.Instance();
+        var blockStatus = _getBlockResultType(infoProxy, combined.AccId, combined.ContentId);
+        _logger.LogTrace("CharaPtr {ptr} is BlockStatus: {status}", ptr, blockStatus);
+        return _blockedCharacterCache[combined] = blockStatus != BlockResultType.NotBlocked;
+    }
+}