MovementTests/resource_definitions/RDamageModifier.cs

using Godot;
using System;
using Movementtests.interfaces;
using Movementtests.systems.damage;

[GlobalClass]
public partial class RDamageModifier : Resource, IDamageable
{
    public event Action<IDamageable, DamageRecord> DamageTaken;
    
    [Export]
    public EDamageTypes DamageType = EDamageTypes.Normal;
    [Export]
    public float Modifier = 1.0f;
    
    public RDamageModifier()
    {
        Modifier = 1.0f;
        DamageType = EDamageTypes.Normal;
    }
    public RDamageModifier(EDamageTypes damageType, float modifier)
    {
        Modifier = modifier;
        DamageType = damageType;
    }

    public DamageRecord TakeDamage(DamageRecord damageRecord)
    {
        if (damageRecord.Damage.DamageType != DamageType) 
            return damageRecord with { Damage = new RDamage(0, damageRecord.Damage.DamageType) };
        
        var finalDamage = damageRecord.Damage.DamageDealt * Modifier;
        var finalDamageRecord = damageRecord with { Damage = new RDamage(finalDamage, damageRecord.Damage.DamageType) };
        DamageTaken?.Invoke(this, finalDamageRecord);
        return finalDamageRecord;
    }
}