tbd-station-14/Content.Server/Ninja/Systems/SpiderChargeSystem.cs

using Content.Server.Explosion.EntitySystems;
using Content.Server.Sticky.Events;
using Content.Server.Popups;
using Content.Shared.Interaction;
using Content.Shared.Ninja.Components;
using Robust.Shared.GameObjects;

namespace Content.Server.Ninja.Systems;

public sealed class SpiderChargeSystem : EntitySystem
{
    [Dependency] private readonly NinjaSystem _ninja = default!;
    [Dependency] private readonly PopupSystem _popups = default!;
    [Dependency] private readonly SharedTransformSystem _transform = default!;

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

        SubscribeLocalEvent<SpiderChargeComponent, BeforeRangedInteractEvent>(BeforePlant);
        SubscribeLocalEvent<SpiderChargeComponent, EntityStuckEvent>(OnStuck);
        SubscribeLocalEvent<SpiderChargeComponent, TriggerEvent>(OnExplode);
    }

    private void BeforePlant(EntityUid uid, SpiderChargeComponent comp, BeforeRangedInteractEvent args)
    {
        var user = args.User;

        if (!TryComp<NinjaComponent>(user, out var ninja))
        {
            _popups.PopupEntity(Loc.GetString("spider-charge-not-ninja"), user, user);
            args.Handled = true;
            return;
        }

        // allow planting anywhere if there is no target, which should never happen
        if (ninja.SpiderChargeTarget != null)
        {
            // assumes warp point still exists
            var target = Transform(ninja.SpiderChargeTarget.Value).MapPosition;
            var coords = args.ClickLocation.ToMap(EntityManager, _transform);
            if (!coords.InRange(target, comp.Range))
            {
                _popups.PopupEntity(Loc.GetString("spider-charge-too-far"), user, user);
                args.Handled = true;
                return;
            }
        }
    }

    private void OnStuck(EntityUid uid, SpiderChargeComponent comp, EntityStuckEvent args)
    {
        comp.Planter = args.User;
    }

    private void OnExplode(EntityUid uid, SpiderChargeComponent comp, TriggerEvent args)
    {
        if (comp.Planter == null || !TryComp<NinjaComponent>(comp.Planter, out var ninja))
            return;

        // assumes the target was destroyed, that the charge wasn't moved somehow
        _ninja.DetonateSpiderCharge(ninja);
    }
}