trail-into-darkness/Assets/Code/GameState/Entities/CharacterAttributesFactory.cs

using System;
using System.Linq;

namespace Nox.Game {
    public interface ICharacterAttributesFactory {
        EntityAttributes Create(EntityAttributes entityAttributes);
    }

    public sealed class CharacterAttributesFactory : ICharacterAttributesFactory {
        private readonly CharacterRegistry characterRegistry;

        public CharacterAttributesFactory(CharacterRegistry characterRegistry) {
            this.characterRegistry = characterRegistry;
        }

        public EntityAttributes Create(EntityAttributes entityAttributes) {
            if(entityAttributes.attributes.All(a => a.value != 0)) {
                throw new ArgumentOutOfRangeException( "attributes cannot be zero or negative.", new ArgumentException() );
            }
            //TODO: Handle attributes modifiers and perks
            return entityAttributes;
        }
    }
}