view API/Objects/Requirement/UnitRequiresAtLeastNUnitsRequirement.cs @ 350:6c0404277cad

Re #27: Unit requirements * Rebuild base "at least" requirement to say "N/A" when added unit isn't constrained * Remove duplicate code from "unit requires at least" requirement and override where necessary
author IBBoard <dev@ibboard.co.uk>
date Sat, 09 Apr 2011 19:57:40 +0000
parents 008537acf244
children 777725613edb
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// This file (UnitRequiresAtLeastNUnitsRequirement.cs) is a part of the IBBoard.WarFoundry.API project and is copyright 2011 IBBoard
// 
// The file and the library/program it is in are licensed and distributed, without warranty, under the GNU Affero GPL license, either version 3 of the License or (at your option) any later version. Please see COPYING for more information and the full license.
using System;
using System.Collections.Generic;
using IBBoard.WarFoundry.API.Objects;

namespace IBBoard.WarFoundry.API.Objects.Requirement
{
	/// <summary>
	/// A requirement where a UnitType requires at least N units of one or more unit types before any number of that object can be taken in an army.
	/// </summary>
	public class UnitRequiresAtLeastNUnitsRequirement : RequiresAtLeastNUnitsRequirement
	{
		private UnitType requirementOnType;

		public UnitRequiresAtLeastNUnitsRequirement(UnitType requirementOn) : base()
		{
			requirementOnType = requirementOn;
		}

		protected override bool IsApplicable(WarFoundryObject toObjectAdded)
		{
			return base.IsApplicable(toObjectAdded) || IsRequirementOnType(toObjectAdded);
		}

		private bool IsRequirementOnType(WarFoundryObject toObjectAdded)
		{
			return requirementOnType.Equals(toObjectAdded) || (toObjectAdded is Unit && requirementOnType.Equals(((Unit)toObjectAdded).UnitType));
		}

		protected override bool IsApplicable(Army toArmy)
		{
			return toArmy.GetUnitTypeCount(requirementOnType) > 0;
		}

		public override Validation ValidatesArmy(Army toArmy)
		{
			return IsApplicable(toArmy) ? base.ValidatesArmy(toArmy) : Validation.NotApplicable;
		}
	}
}