First commit

Assets/Code/GameState/Entities/CharacterAttributesFactory.cs

@@ -0,0 +1,33 @@
+using System;
+using ZLinq;
+
+namespace Nox.Game {
+    public interface ICharacterAttributesFactory {
+        EntityAttributes Create(IEntityDefinition entityDefinition);
+    }
+
+    public sealed class CharacterAttributesFactory : ICharacterAttributesFactory {
+        private readonly IModifierResolver modifierResolver;
+
+        public CharacterAttributesFactory(IModifierResolver modifierResolver) {
+            this.modifierResolver = modifierResolver ?? throw new ArgumentNullException(nameof(modifierResolver));
+        }
+
+        public EntityAttributes Create(IEntityDefinition entityDefinition) {
+            var attributes = entityDefinition.Attributes;
+
+            if(attributes.attributes.AsValueEnumerable().Any(a => a.value <= 0)) {
+                throw new ArgumentOutOfRangeException( "attributes cannot be zero or negative.", new ArgumentException() );
+            }
+
+            return new EntityAttributes {
+                attributes = attributes.attributes.AsValueEnumerable()
+                    .Select(a => {
+                        var modifiers = modifierResolver.CollectModifiers(entityDefinition, a.attribute);
+                        return new Attribute(a.attribute, modifierResolver.Resolve(a.value, modifiers, entityDefinition));
+                    })
+                    .ToArray()
+            };
+        }
+    }
+}