Improve hands & pulling (#4389)

Content.Shared/Hands/Components/HandVirtualPullComponent.cs

@@ -0,0 +1,50 @@
+using System;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameStates;
+using Robust.Shared.Players;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Hands.Components
+{
+    [RegisterComponent]
+    [NetworkedComponent]
+    public sealed class HandVirtualPullComponent : Component
+    {
+        private EntityUid _pulledEntity;
+        public override string Name => "HandVirtualPull";
+
+        public EntityUid PulledEntity
+        {
+            get => _pulledEntity;
+            set
+            {
+                _pulledEntity = value;
+                Dirty();
+            }
+        }
+
+        public override ComponentState GetComponentState(ICommonSession player)
+        {
+            return new VirtualPullComponentState(_pulledEntity);
+        }
+
+        public override void HandleComponentState(ComponentState? curState, ComponentState? nextState)
+        {
+            if (curState is not VirtualPullComponentState pullState)
+                return;
+
+            _pulledEntity = pullState.PulledEntity;
+        }
+
+        [Serializable, NetSerializable]
+        public sealed class VirtualPullComponentState : ComponentState
+        {
+            public readonly EntityUid PulledEntity;
+
+            public VirtualPullComponentState(EntityUid pulledEntity)
+            {
+                PulledEntity = pulledEntity;
+            }
+        }
+    }
+}