Теперь предметы можно передавать из рук в руки (#462)

* add: Теперь предеты можно передовать из рук в руки

* Кудато не туда уехало

Content.Server/_White/OfferItem/OfferItemSystem.cs

@@ -0,0 +1,83 @@
+using Content.Server.Popups;
+using Content.Shared.Hands.Components;
+using Content.Shared.Alert;
+using Content.Shared.Hands.EntitySystems;
+using Content.Shared._White.OfferItem;
+using Content.Shared.IdentityManagement;
+using Robust.Shared.Player;
+
+namespace Content.Server._White.OfferItem;
+
+public sealed class OfferItemSystem : SharedOfferItemSystem
+{
+    [Dependency] private readonly AlertsSystem _alertsSystem = default!;
+    [Dependency] private readonly SharedHandsSystem _hands = default!;
+    [Dependency] private readonly PopupSystem _popup = default!;
+
+    public override void Update(float frameTime)
+    {
+        base.Update(frameTime);
+
+        var query = EntityQueryEnumerator<OfferItemComponent>();
+        while (query.MoveNext(out var uid, out var offerItem))
+        {
+            if (!TryComp<HandsComponent>(uid, out var hands) || hands.ActiveHand == null)
+                continue;
+
+            if (offerItem.Hand != null &&
+                hands.Hands[offerItem.Hand].HeldEntity == null)
+            {
+                if (offerItem.Target != null)
+                {
+                    UnReceive(offerItem.Target.Value, offerItem: offerItem);
+                    offerItem.IsInOfferMode = false;
+                    Dirty(uid, offerItem);
+                }
+                else
+                    UnOffer(uid, offerItem);
+            }
+
+            if (!offerItem.IsInReceiveMode)
+            {
+                _alertsSystem.ClearAlert(uid, AlertType.Offer);
+                continue;
+            }
+
+            _alertsSystem.ShowAlert(uid, AlertType.Offer);
+        }
+    }
+
+    /// <summary>
+    /// Accepting the offer and receive item
+    /// </summary>
+    public void Receive(EntityUid uid, OfferItemComponent? component = null)
+    {
+        if (!Resolve(uid, ref component) ||
+            !TryComp<OfferItemComponent>(component.Target, out var offerItem) ||
+            offerItem.Hand == null ||
+            component.Target == null ||
+            !TryComp<HandsComponent>(uid, out var hands))
+            return;
+
+        if (offerItem.Item != null)
+        {
+            if (!_hands.TryPickup(uid, offerItem.Item.Value, handsComp: hands))
+            {
+                _popup.PopupEntity(Loc.GetString("offer-item-full-hand"), uid, uid);
+                return;
+            }
+
+            _popup.PopupEntity(Loc.GetString("offer-item-give",
+                ("item", Identity.Entity(offerItem.Item.Value, EntityManager)),
+                ("target", Identity.Entity(uid, EntityManager))), component.Target.Value, component.Target.Value);
+            _popup.PopupEntity(Loc.GetString("offer-item-give-other",
+                    ("user", Identity.Entity(component.Target.Value, EntityManager)),
+                    ("item", Identity.Entity(offerItem.Item.Value, EntityManager)),
+                    ("target", Identity.Entity(uid, EntityManager)))
+                , component.Target.Value, Filter.PvsExcept(component.Target.Value, entityManager: EntityManager), true);
+        }
+
+        offerItem.Item = null;
+        UnReceive(uid, component, offerItem);
+    }
+}