tbd-station-14/Content.Server/Implants/SubdermalImplantSystem.cs

using Content.Server.Cuffs;
using Content.Server.Forensics;
using Content.Server.Humanoid;
using Content.Server.Implants.Components;
using Content.Server.Store.Components;
using Content.Server.Store.Systems;
using Content.Shared.Cuffs.Components;
using Content.Shared.Humanoid;
using Content.Shared.Implants;
using Content.Shared.Implants.Components;
using Content.Shared.Interaction;
using Content.Shared.Physics;
using Content.Shared.Popups;
using Content.Shared.Preferences;
using Robust.Shared.Audio.Systems;
using Robust.Shared.Map;
using Robust.Shared.Maths;
using Robust.Shared.Physics;
using Robust.Shared.Physics.Components;
using Robust.Shared.Random;
using System.Numerics;

namespace Content.Server.Implants;

public sealed class SubdermalImplantSystem : SharedSubdermalImplantSystem
{
    [Dependency] private readonly CuffableSystem _cuffable = default!;
    [Dependency] private readonly HumanoidAppearanceSystem _humanoidAppearance = default!;
    [Dependency] private readonly IMapManager _mapManager = default!;
    [Dependency] private readonly IRobustRandom _random = default!;
    [Dependency] private readonly MetaDataSystem _metaData = default!;
    [Dependency] private readonly StoreSystem _store = default!;
    [Dependency] private readonly SharedAudioSystem _audio = default!;
    [Dependency] private readonly SharedPopupSystem _popup = default!;
    [Dependency] private readonly SharedTransformSystem _xform = default!;
    [Dependency] private readonly ForensicsSystem _forensicsSystem = default!;

    private EntityQuery<PhysicsComponent> _physicsQuery;

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

        _physicsQuery = GetEntityQuery<PhysicsComponent>();

        SubscribeLocalEvent<SubdermalImplantComponent, UseFreedomImplantEvent>(OnFreedomImplant);
        SubscribeLocalEvent<StoreComponent, ImplantRelayEvent<AfterInteractUsingEvent>>(OnStoreRelay);
        SubscribeLocalEvent<SubdermalImplantComponent, ActivateImplantEvent>(OnActivateImplantEvent);
        SubscribeLocalEvent<SubdermalImplantComponent, UseScramImplantEvent>(OnScramImplant);
        SubscribeLocalEvent<SubdermalImplantComponent, UseDnaScramblerImplantEvent>(OnDnaScramblerImplant);

    }

    private void OnStoreRelay(EntityUid uid, StoreComponent store, ImplantRelayEvent<AfterInteractUsingEvent> implantRelay)
    {
        var args = implantRelay.Event;

        if (args.Handled)
            return;

        // can only insert into yourself to prevent uplink checking with renault
        if (args.Target != args.User)
            return;

        if (!TryComp<CurrencyComponent>(args.Used, out var currency))
            return;

        // same as store code, but message is only shown to yourself
        args.Handled = _store.TryAddCurrency(_store.GetCurrencyValue(args.Used, currency), uid, store);

        if (!args.Handled)
            return;

        var msg = Loc.GetString("store-currency-inserted-implant", ("used", args.Used));
        _popup.PopupEntity(msg, args.User, args.User);
        QueueDel(args.Used);
    }

    private void OnFreedomImplant(EntityUid uid, SubdermalImplantComponent component, UseFreedomImplantEvent args)
    {
        if (!TryComp<CuffableComponent>(component.ImplantedEntity, out var cuffs) || cuffs.Container.ContainedEntities.Count < 1)
            return;

        _cuffable.Uncuff(component.ImplantedEntity.Value, cuffs.LastAddedCuffs, cuffs.LastAddedCuffs);
        args.Handled = true;
    }

    private void OnActivateImplantEvent(EntityUid uid, SubdermalImplantComponent component, ActivateImplantEvent args)
    {
        args.Handled = true;
    }

    private void OnScramImplant(EntityUid uid, SubdermalImplantComponent component, UseScramImplantEvent args)
    {
        if (component.ImplantedEntity is not { } ent)
            return;

        if (!TryComp<ScramImplantComponent>(uid, out var implant))
            return;

        var xform = Transform(ent);
        var entityCoords = xform.Coordinates.ToMap(EntityManager);

        // try to find a valid position to teleport to, teleport to whatever works if we can't
        var targetCoords = new MapCoordinates();
        for (var i = 0; i < implant.TeleportAttempts; i++)
        {
            var distance = implant.TeleportRadius * MathF.Sqrt(_random.NextFloat()); // to get an uniform distribution
            targetCoords = entityCoords.Offset(_random.NextAngle().ToVec() * distance);

            // prefer teleporting to grids
            if (!_mapManager.TryFindGridAt(targetCoords, out var gridUid, out var grid))
                continue;

            // the implant user probably does not want to be in your walls
            var valid = true;
            foreach (var entity in grid.GetAnchoredEntities(targetCoords))
            {
                if (!_physicsQuery.TryGetComponent(entity, out var body))
                    continue;

                if (body.BodyType != BodyType.Static ||
                    !body.Hard ||
                    (body.CollisionLayer & (int) CollisionGroup.Impassable) == 0)
                    continue;

                valid = false;
                break;
            }
            if (valid)
                break;
        }
        _xform.SetWorldPosition(ent, targetCoords.Position);
        _xform.AttachToGridOrMap(ent, xform);
        _audio.PlayPvs(implant.TeleportSound, ent);

        args.Handled = true;
    }

    private void OnDnaScramblerImplant(EntityUid uid, SubdermalImplantComponent component, UseDnaScramblerImplantEvent args)
    {
        if (component.ImplantedEntity is not { } ent)
            return;

        if (TryComp<HumanoidAppearanceComponent>(ent, out var humanoid))
        {
            var newProfile = HumanoidCharacterProfile.RandomWithSpecies(humanoid.Species);
            _humanoidAppearance.LoadProfile(ent, newProfile, humanoid);
            _metaData.SetEntityName(ent, newProfile.Name);
            if (TryComp<DnaComponent>(ent, out var dna))
            {
                dna.DNA = _forensicsSystem.GenerateDNA();
            }
            if (TryComp<FingerprintComponent>(ent, out var fingerprint))
            {
                fingerprint.Fingerprint = _forensicsSystem.GenerateFingerprint();
            }
            _popup.PopupEntity(Loc.GetString("scramble-implant-activated-popup"), ent, ent);
        }

        args.Handled = true;
        QueueDel(uid);
    }
}