tbd-station-14/Content.Server/GameObjects/Components/Mobs/State/DeadState.cs

using Content.Server.GameObjects.EntitySystems;
using Content.Shared.GameObjects.Components.Damage;
using Content.Shared.GameObjects.Components.Mobs;
using Content.Shared.GameObjects.Components.Mobs.State;
using Robust.Server.GameObjects;
using Robust.Shared.GameObjects.Components;
using Robust.Shared.GameObjects.Systems;
using Robust.Shared.Interfaces.GameObjects;

namespace Content.Server.GameObjects.Components.Mobs.State
{
    public class DeadState : SharedDeadState
    {
        public override void EnterState(IEntity entity)
        {
            if (entity.TryGetComponent(out AppearanceComponent appearance))
            {
                appearance.SetData(DamageStateVisuals.State, DamageState.Dead);
            }

            if (entity.TryGetComponent(out ServerStatusEffectsComponent status))
            {
                status.ChangeStatusEffectIcon(StatusEffect.Health,
                    "/Textures/Interface/StatusEffects/Human/humandead.png");
            }

            if (entity.TryGetComponent(out ServerOverlayEffectsComponent overlayComponent))
            {
                overlayComponent.AddOverlay(SharedOverlayID.CircleMaskOverlay);
            }

            if (entity.TryGetComponent(out StunnableComponent stun))
            {
                stun.CancelAll();
            }

            EntitySystem.Get<StandingStateSystem>().Down(entity);

            if (entity.TryGetComponent(out IPhysicsComponent physics))
            {
                physics.CanCollide = false;
            }
        }

        public override void ExitState(IEntity entity)
        {
            EntitySystem.Get<StandingStateSystem>().Standing(entity);

            if (entity.TryGetComponent(out IPhysicsComponent physics))
            {
                physics.CanCollide = true;
            }

            if (entity.TryGetComponent(out ServerOverlayEffectsComponent overlay))
            {
                overlay.ClearOverlays();
            }
        }

        public override void UpdateState(IEntity entity) { }
    }
}