CatStation/Content.Server/Armor/ArmorSystem.cs

using Content.Shared.Armor;
using Content.Shared.Cargo;
using Content.Shared.Damage.Prototypes;

namespace Content.Server.Armor;

/// <inheritdoc/>
public sealed partial class ArmorSystem : SharedArmorSystem
{
    public override void Initialize()
    {
        base.Initialize();

        SubscribeLocalEvent<ArmorComponent, PriceCalculationEvent>(GetArmorPrice);
    }

    private void GetArmorPrice(EntityUid uid, ArmorComponent component, ref PriceCalculationEvent args)
    {
        foreach (var modifier in component.Modifiers.Coefficients)
        {
            var damageType = ProtoMan.Index<DamageTypePrototype>(modifier.Key);
            args.Price += component.PriceMultiplier * damageType.ArmorPriceCoefficient * 100 * (1 - modifier.Value);
        }

        foreach (var modifier in component.Modifiers.FlatReductions)
        {
            var damageType = ProtoMan.Index<DamageTypePrototype>(modifier.Key);
            args.Price += component.PriceMultiplier * damageType.ArmorPriceFlat * modifier.Value;
        }
    }
}