tbd-station-14/Content.Server/AI/Operators/Inventory/PickupEntityOperator.cs

using Content.Server.Hands.Components;
using Content.Server.Interaction;
using Content.Shared.Interaction.Helpers;
using Content.Shared.Item;
using Robust.Shared.Containers;
using Robust.Shared.GameObjects;
using Robust.Shared.IoC;

namespace Content.Server.AI.Operators.Inventory
{
    public class PickupEntityOperator : AiOperator
    {
        // Input variables
        private readonly EntityUid _owner;
        private readonly EntityUid _target;

        public PickupEntityOperator(EntityUid owner, EntityUid target)
        {
            _owner = owner;
            _target = target;
        }

        public override Outcome Execute(float frameTime)
        {
            var entMan = IoCManager.Resolve<IEntityManager>();

            if (entMan.Deleted(_target)
                || !entMan.HasComponent<SharedItemComponent>(_target)
                || _target.IsInContainer()
                || !_owner.InRangeUnobstructed(_target, popup: true))
            {
                return Outcome.Failed;
            }

            if (!entMan.TryGetComponent(_owner, out HandsComponent? handsComponent))
            {
                return Outcome.Failed;
            }

            var emptyHands = false;

            foreach (var hand in handsComponent.ActivePriorityEnumerable())
            {
                if (handsComponent.GetItem(hand) == null)
                {
                    if (handsComponent.ActiveHand != hand)
                    {
                        handsComponent.ActiveHand = hand;
                    }

                    emptyHands = true;
                    break;
                }
            }

            if (!emptyHands)
            {
                return Outcome.Failed;
            }

            var interactionSystem = EntitySystem.Get<InteractionSystem>();
            interactionSystem.InteractHand(_owner, _target);
            return Outcome.Success;
        }
    }
}