civ14/Content.Client/Weapons/Marker/DamageMarkerSystem.cs

using Content.Shared.Weapons.Marker;
using Robust.Client.GameObjects;
using Robust.Shared.Timing;

namespace Content.Client.Weapons.Marker;

public sealed class DamageMarkerSystem : SharedDamageMarkerSystem
{
    [Dependency] private readonly IGameTiming _timing = default!;

    public override void Initialize()
    {
        base.Initialize();
        SubscribeLocalEvent<DamageMarkerComponent, ComponentStartup>(OnMarkerStartup);
        SubscribeLocalEvent<DamageMarkerComponent, ComponentShutdown>(OnMarkerShutdown);
    }

    private void OnMarkerStartup(EntityUid uid, DamageMarkerComponent component, ComponentStartup args)
    {
        if (!_timing.ApplyingState || component.Effect == null || !TryComp<SpriteComponent>(uid, out var sprite))
            return;

        var layer = sprite.LayerMapReserveBlank(DamageMarkerKey.Key);
        sprite.LayerSetState(layer, component.Effect.RsiState, component.Effect.RsiPath);
    }

    private void OnMarkerShutdown(EntityUid uid, DamageMarkerComponent component, ComponentShutdown args)
    {
        if (!_timing.ApplyingState || !TryComp<SpriteComponent>(uid, out var sprite) || !sprite.LayerMapTryGet(DamageMarkerKey.Key, out var weh))
            return;

        sprite.RemoveLayer(weh);
    }

    private enum DamageMarkerKey : byte
    {
        Key
    }
}