tbd-station-14/Content.Server/Tesla/EntitySystem/TeslaCoilSystem.cs

using Content.Server.Popups;
using Content.Server.Power.Components;
using Content.Server.Power.EntitySystems;
using Content.Server.Tesla.Components;
using Content.Server.Lightning;
using Robust.Shared.Timing;

namespace Content.Server.Tesla.EntitySystems;

/// <summary>
/// Generates electricity from lightning bolts
/// </summary>
public sealed class TeslaCoilSystem : EntitySystem
{
    [Dependency] private readonly BatterySystem _battery = default!;

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

        SubscribeLocalEvent<TeslaCoilComponent, HitByLightningEvent>(OnHitByLightning);
    }

    //When struck by lightning, charge the internal battery
    private void OnHitByLightning(Entity<TeslaCoilComponent> coil, ref HitByLightningEvent args)
    {
        if (!TryComp<BatteryComponent>(coil, out var batteryComponent))
            return;

        _battery.SetCharge(coil, batteryComponent.CurrentCharge + coil.Comp.ChargeFromLightning);
    }
}