first commit

NitroxServer/Communication/Packets/Processors/PvPAttackProcessor.cs

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+using System.Collections.Generic;
+using NitroxModel.Packets;
+using NitroxModel.Serialization;
+using NitroxServer.Communication.Packets.Processors.Abstract;
+using NitroxServer.GameLogic;
+using NitroxServer.Serialization;
+
+namespace NitroxServer.Communication.Packets.Processors;
+
+public class PvPAttackProcessor : AuthenticatedPacketProcessor<PvPAttack>
+{
+    private readonly SubnauticaServerConfig serverConfig;
+    private readonly PlayerManager playerManager;
+
+    // TODO: In the future, do a whole config for damage sources
+    private static readonly Dictionary<PvPAttack.AttackType, float> damageMultiplierByType = new()
+    {
+        { PvPAttack.AttackType.KnifeHit, 0.5f },
+        { PvPAttack.AttackType.HeatbladeHit, 1f }
+    };
+
+    public PvPAttackProcessor(SubnauticaServerConfig serverConfig, PlayerManager playerManager)
+    {
+        this.serverConfig = serverConfig;
+        this.playerManager = playerManager;
+    }
+
+    public override void Process(PvPAttack packet, Player player)
+    {
+        if (!serverConfig.PvPEnabled)
+        {
+            return;
+        }
+        if (!playerManager.TryGetPlayerById(packet.TargetPlayerId, out Player targetPlayer))
+        {
+            return;
+        }
+        if (!damageMultiplierByType.TryGetValue(packet.Type, out float multiplier))
+        {
+            return;
+        }
+
+        packet.Damage *= multiplier;
+        targetPlayer.SendPacket(packet);
+    }
+}