Removes all dependencies on engine component events. (#4199)

Content.Client/Inventory/ClientInventoryComponent.cs

@@ -1,4 +1,4 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using Content.Client.Clothing;
@@ -252,22 +252,16 @@ namespace Content.Client.Inventory
             SendNetworkMessage(new OpenSlotStorageUIMessage(slot));
         }
 
-        public override void HandleMessage(ComponentMessage message, IComponent? component)
+        public void PlayerDetached()
         {
-            base.HandleMessage(message, component);
+            InterfaceController.PlayerDetached();
+            _playerAttached = false;
+        }
 
-            switch (message)
-            {
-                case PlayerAttachedMsg _:
-                    InterfaceController.PlayerAttached();
-                    _playerAttached = true;
-                    break;
-
-                case PlayerDetachedMsg _:
-                    InterfaceController.PlayerDetached();
-                    _playerAttached = false;
-                    break;
-            }
+        public void PlayerAttached()
+        {
+            InterfaceController.PlayerAttached();
+            _playerAttached = true;
         }
 
         public bool TryGetSlot(Slots slot, [NotNullWhen(true)] out IEntity? item)

Content.Client/Inventory/ClientInventorySystem.cs

@@ -1,7 +1,7 @@
 using Content.Client.HUD;
 using Content.Shared.Input;
 using JetBrains.Annotations;
-using Robust.Client.Player;
+using Robust.Client.GameObjects;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Input.Binding;
 using Robust.Shared.IoC;
@@ -12,7 +12,6 @@ namespace Content.Client.Inventory
     public sealed class ClientInventorySystem : EntitySystem
     {
         [Dependency] private readonly IGameHud _gameHud = default!;
-        [Dependency] private readonly IPlayerManager _playerManager = default!;
 
         public override void Initialize()
         {
@@ -22,6 +21,9 @@ namespace Content.Client.Inventory
                 .Bind(ContentKeyFunctions.OpenInventoryMenu,
                     InputCmdHandler.FromDelegate(_ => HandleOpenInventoryMenu()))
                 .Register<ClientInventorySystem>();
+
+            SubscribeLocalEvent<ClientInventoryComponent, PlayerAttachedEvent>((_, component, _) => component.PlayerAttached());
+            SubscribeLocalEvent<ClientInventoryComponent, PlayerDetachedEvent>((_, component, _) => component.PlayerDetached());
         }
 
         public override void Shutdown()