ss14-wega/Content.Client/_Wega/NullRod/NullDamageSystem.cs

using Content.Shared.NullRod.Components;
using Robust.Client.Graphics;
using Robust.Client.Player;
using Robust.Shared.Player;

namespace Content.Client.NullRod;

public sealed class NullDamageSystem : EntitySystem
{
    [Dependency] private IPlayerManager _player = default!;
    [Dependency] private IOverlayManager _overlayMan = default!;

    private NullDamageOverlay _overlay = default!;

    public override void Initialize()
    {
        base.Initialize();

        SubscribeLocalEvent<NullDamageComponent, ComponentInit>(OnInit);
        SubscribeLocalEvent<NullDamageComponent, ComponentShutdown>(OnShutdown);

        SubscribeLocalEvent<NullDamageComponent, LocalPlayerAttachedEvent>(OnPlayerAttached);
        SubscribeLocalEvent<NullDamageComponent, LocalPlayerDetachedEvent>(OnPlayerDetached);

        _overlay = new();
    }

    private void OnPlayerAttached(EntityUid uid, NullDamageComponent component, LocalPlayerAttachedEvent args)
    {
        _overlayMan.AddOverlay(_overlay);
    }

    private void OnPlayerDetached(EntityUid uid, NullDamageComponent component, LocalPlayerDetachedEvent args)
    {
        _overlayMan.RemoveOverlay(_overlay);
    }

    private void OnInit(EntityUid uid, NullDamageComponent component, ComponentInit args)
    {
        if (_player.LocalEntity == uid)
            _overlayMan.AddOverlay(_overlay);
    }

    private void OnShutdown(EntityUid uid, NullDamageComponent component, ComponentShutdown args)
    {
        if (_player.LocalEntity == uid)
            _overlayMan.RemoveOverlay(_overlay);
    }
}