tbd-station-14/Content.Server/Stunnable/Systems/StunOnCollideSystem.cs

using Content.Server.Stunnable.Components;
using Content.Shared.Standing;
using Content.Shared.StatusEffect;
using JetBrains.Annotations;
using Robust.Shared.Physics.Dynamics;
using Content.Shared.Throwing;
using Robust.Shared.Physics.Events;

namespace Content.Server.Stunnable
{
    [UsedImplicitly]
    internal sealed class StunOnCollideSystem : EntitySystem
    {
        [Dependency] private readonly StunSystem _stunSystem = default!;

        public override void Initialize()
        {
            base.Initialize();
            SubscribeLocalEvent<StunOnCollideComponent, StartCollideEvent>(HandleCollide);
            SubscribeLocalEvent<StunOnCollideComponent, ThrowDoHitEvent>(HandleThrow);
        }

        private void TryDoCollideStun(EntityUid uid, StunOnCollideComponent component, EntityUid target)
        {
            if (!TryComp<StatusEffectsComponent>(target, out var status))
                return;

            _stunSystem.TryStun(target, component.StunAmount, component.Refresh, status);

            _stunSystem.TryKnockdown(target, component.KnockdownAmount, component.Refresh, component.AutoStand);

            _stunSystem.TrySlowdown(target, component.SlowdownAmount, component.Refresh, component.WalkSpeedModifier, component.SprintSpeedModifier, status);
        }
        private void HandleCollide(EntityUid uid, StunOnCollideComponent component, ref StartCollideEvent args)
        {
            if (args.OurFixtureId != component.FixtureID)
                return;

            TryDoCollideStun(uid, component, args.OtherEntity);
        }

        private void HandleThrow(EntityUid uid, StunOnCollideComponent component, ThrowDoHitEvent args)
        {
            TryDoCollideStun(uid, component, args.Target);
        }
    }
}