whitelist and blacklist support for inventory slots (#11766)

Content.Shared/Inventory/InventorySystem.Equip.cs

@@ -281,6 +281,18 @@ public abstract partial class InventorySystem
             return false;
         }
 
+        if (slotDefinition.Whitelist != null && !slotDefinition.Whitelist.IsValid(itemUid))
+        {
+            reason = "inventory-component-can-equip-does-not-fit";
+            return false;
+        }
+
+        if (slotDefinition.Blacklist != null && slotDefinition.Blacklist.IsValid(itemUid))
+        {
+            reason = "inventory-component-can-equip-does-not-fit";
+            return false;
+        }
+
         var attemptEvent = new IsEquippingAttemptEvent(actor, target, itemUid, slotDefinition);
         RaiseLocalEvent(target, attemptEvent, true);
         if (attemptEvent.Cancelled)

Content.Shared/Inventory/InventoryTemplatePrototype.cs

@@ -1,4 +1,5 @@
-using Robust.Shared.Prototypes;
+using Content.Shared.Whitelist;
+using Robust.Shared.Prototypes;
 
 namespace Content.Shared.Inventory;
 
@@ -38,6 +39,16 @@ public sealed class SlotDefinition
     ///     Offset for the clothing sprites.
     /// </summary>
     [DataField("offset")] public Vector2 Offset { get; } = Vector2.Zero;
+
+    /// <summary>
+    ///     Entity whitelist for CanEquip checks.
+    /// </summary>
+    [DataField("whitelist")] public EntityWhitelist? Whitelist = null;
+
+    /// <summary>
+    ///     Entity blacklist for CanEquip checks.
+    /// </summary>
+    [DataField("blacklist")] public EntityWhitelist? Blacklist = null;
 }
 
 public enum SlotUIContainer