tbd-station-14/Content.Client/Ghost/GhostSystem.cs

using Content.Client.Movement.Systems;
using Content.Shared.Actions;
using Content.Shared.Ghost;
using Robust.Client.Console;
using Robust.Client.GameObjects;
using Robust.Client.Graphics;
using Robust.Client.Player;
using Robust.Shared.Player;

namespace Content.Client.Ghost
{
    public sealed class GhostSystem : SharedGhostSystem
    {
        [Dependency] private readonly IClientConsoleHost _console = default!;
        [Dependency] private readonly IPlayerManager _playerManager = default!;
        [Dependency] private readonly SharedActionsSystem _actions = default!;
        [Dependency] private readonly ContentEyeSystem _contentEye = default!;

        public int AvailableGhostRoleCount { get; private set; }

        private bool _ghostVisibility = true;

        private bool GhostVisibility
        {
            get => _ghostVisibility;
            set
            {
                if (_ghostVisibility == value)
                {
                    return;
                }

                _ghostVisibility = value;

                var query = AllEntityQuery<GhostComponent, SpriteComponent>();
                while (query.MoveNext(out var uid, out _, out var sprite))
                {
                    sprite.Visible = value || uid == _playerManager.LocalEntity;
                }
            }
        }

        public GhostComponent? Player => CompOrNull<GhostComponent>(_playerManager.LocalEntity);
        public bool IsGhost => Player != null;

        public event Action<GhostComponent>? PlayerRemoved;
        public event Action<GhostComponent>? PlayerUpdated;
        public event Action<GhostComponent>? PlayerAttached;
        public event Action? PlayerDetached;
        public event Action<GhostWarpsResponseEvent>? GhostWarpsResponse;
        public event Action<GhostUpdateGhostRoleCountEvent>? GhostRoleCountUpdated;

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

            SubscribeLocalEvent<GhostComponent, ComponentStartup>(OnStartup);
            SubscribeLocalEvent<GhostComponent, ComponentRemove>(OnGhostRemove);
            SubscribeLocalEvent<GhostComponent, AfterAutoHandleStateEvent>(OnGhostState);

            SubscribeLocalEvent<GhostComponent, LocalPlayerAttachedEvent>(OnGhostPlayerAttach);
            SubscribeLocalEvent<GhostComponent, LocalPlayerDetachedEvent>(OnGhostPlayerDetach);

            SubscribeNetworkEvent<GhostWarpsResponseEvent>(OnGhostWarpsResponse);
            SubscribeNetworkEvent<GhostUpdateGhostRoleCountEvent>(OnUpdateGhostRoleCount);

            SubscribeLocalEvent<EyeComponent, ToggleLightingActionEvent>(OnToggleLighting);
            SubscribeLocalEvent<EyeComponent, ToggleFoVActionEvent>(OnToggleFoV);
            SubscribeLocalEvent<GhostComponent, ToggleGhostsActionEvent>(OnToggleGhosts);
        }

        private void OnStartup(EntityUid uid, GhostComponent component, ComponentStartup args)
        {
            if (TryComp(uid, out SpriteComponent? sprite))
                sprite.Visible = GhostVisibility || uid == _playerManager.LocalEntity;
        }

        private void OnToggleLighting(EntityUid uid, EyeComponent component, ToggleLightingActionEvent args)
        {
            if (args.Handled)
                return;

            Popup.PopupEntity(Loc.GetString("ghost-gui-toggle-lighting-manager-popup"), args.Performer);
            _contentEye.RequestToggleLight(uid, component);
            args.Handled = true;
        }

        private void OnToggleFoV(EntityUid uid, EyeComponent component, ToggleFoVActionEvent args)
        {
            if (args.Handled)
                return;

            Popup.PopupEntity(Loc.GetString("ghost-gui-toggle-fov-popup"), args.Performer);
            _contentEye.RequestToggleFov(uid, component);
            args.Handled = true;
        }

        private void OnToggleGhosts(EntityUid uid, GhostComponent component, ToggleGhostsActionEvent args)
        {
            if (args.Handled)
                return;

            Popup.PopupEntity(Loc.GetString("ghost-gui-toggle-ghost-visibility-popup"), args.Performer);

            if (uid == _playerManager.LocalEntity)
                ToggleGhostVisibility();

            args.Handled = true;
        }

        private void OnGhostRemove(EntityUid uid, GhostComponent component, ComponentRemove args)
        {
            _actions.RemoveAction(uid, component.ToggleLightingActionEntity);
            _actions.RemoveAction(uid, component.ToggleFoVActionEntity);
            _actions.RemoveAction(uid, component.ToggleGhostsActionEntity);
            _actions.RemoveAction(uid, component.ToggleGhostHearingActionEntity);

            if (uid != _playerManager.LocalEntity)
                return;

            GhostVisibility = false;
            PlayerRemoved?.Invoke(component);
        }

        private void OnGhostPlayerAttach(EntityUid uid, GhostComponent component, LocalPlayerAttachedEvent localPlayerAttachedEvent)
        {
            GhostVisibility = true;
            PlayerAttached?.Invoke(component);
        }

        private void OnGhostState(EntityUid uid, GhostComponent component, ref AfterAutoHandleStateEvent args)
        {
            if (TryComp<SpriteComponent>(uid, out var sprite))
                sprite.LayerSetColor(0, component.color);

            if (uid != _playerManager.LocalEntity)
                return;

            PlayerUpdated?.Invoke(component);
        }

        private void OnGhostPlayerDetach(EntityUid uid, GhostComponent component, LocalPlayerDetachedEvent args)
        {
            GhostVisibility = false;
            PlayerDetached?.Invoke();
        }

        private void OnGhostWarpsResponse(GhostWarpsResponseEvent msg)
        {
            if (!IsGhost)
            {
                return;
            }

            GhostWarpsResponse?.Invoke(msg);
        }

        private void OnUpdateGhostRoleCount(GhostUpdateGhostRoleCountEvent msg)
        {
            AvailableGhostRoleCount = msg.AvailableGhostRoles;
            GhostRoleCountUpdated?.Invoke(msg);
        }

        public void RequestWarps()
        {
            RaiseNetworkEvent(new GhostWarpsRequestEvent());
        }

        public void ReturnToBody()
        {
            var msg = new GhostReturnToBodyRequest();
            RaiseNetworkEvent(msg);
        }

        public void OpenGhostRoles()
        {
            _console.RemoteExecuteCommand(null, "ghostroles");
        }

        public void ToggleGhostVisibility()
        {
            GhostVisibility = !GhostVisibility;
        }
    }
}