Raise hand (un)equipped events on container insert/remove (#15664)

Content.Shared/Hands/EntitySystems/SharedHandsSystem.Pickup.cs

@@ -10,6 +10,25 @@ namespace Content.Shared.Hands.EntitySystems;
 
 public abstract partial class SharedHandsSystem : EntitySystem
 {
+    private void InitializePickup()
+    {
+        SubscribeLocalEvent<HandsComponent, EntInsertedIntoContainerMessage>(HandleEntityInserted);
+    }
+
+    protected virtual void HandleEntityInserted(EntityUid uid, HandsComponent hands, EntInsertedIntoContainerMessage args)
+    {
+        if (!TryGetHand(uid, args.Container.ID, out var hand))
+        {
+            return;
+        }
+
+        var didEquip = new DidEquipHandEvent(uid, args.Entity, hand);
+        RaiseLocalEvent(uid, didEquip, false);
+
+        var gotEquipped = new GotEquippedHandEvent(uid, args.Entity, hand);
+        RaiseLocalEvent(args.Entity, gotEquipped, false);
+    }
+
     /// <summary>
     ///     Maximum pickup distance for which the pickup animation plays.
     /// </summary>
@@ -208,17 +227,6 @@ public abstract partial class SharedHandsSystem : EntitySystem
 
         Dirty(hands);
 
-        var didEquip = new DidEquipHandEvent(uid, entity, hand);
-        RaiseLocalEvent(uid, didEquip, false);
-
-        var gotEquipped = new GotEquippedHandEvent(uid, entity, hand);
-        RaiseLocalEvent(entity, gotEquipped, true);
-
-        // TODO this should REALLY be a cancellable thing, not a handled event.
-        // If one of the interactions resulted in the item being dropped, return early.
-        if (gotEquipped.Handled)
-            return;
-
         if (hand == hands.ActiveHand)
             RaiseLocalEvent(entity, new HandSelectedEvent(uid), false);
     }