# HG changeset patch
# User IBBoard <dev@ibboard.co.uk>
# Date 1301512168 0
# Node ID f56254f50ce5cf9458de8870bd096cb42ebed88d
# Parent  17d8d357467e73a8e19b5a3799a4f73a50676ca0
Re #27: Define unit requirements
 * Make use of default value in "Requires at least N"
 * Add initial implementation of "No more than N"

diff -r 17d8d357467e -r f56254f50ce5 IBBoard.WarFoundry.API.csproj
--- a/IBBoard.WarFoundry.API.csproj	Tue Mar 29 19:53:13 2011 +0000
+++ b/IBBoard.WarFoundry.API.csproj	Wed Mar 30 19:09:28 2011 +0000
@@ -187,6 +187,7 @@
     <Compile Include="api\Savers\Xml\WarFoundryXmlFileSaver.cs" />
     <Compile Include="api\Objects\Requirement\RequiresAtLeastNUnitsRequirement.cs" />
     <Compile Include="api\Objects\Requirement\UnitCountRequirementData.cs" />
+    <Compile Include="api\Objects\Requirement\RequiresNoMoreThanNOfUnitTypeRequirement.cs" />
   </ItemGroup>
   <ItemGroup>
     <Reference Include="System.Xml" />
diff -r 17d8d357467e -r f56254f50ce5 api/Objects/Requirement/RequiresAtLeastNUnitsRequirement.cs
--- a/api/Objects/Requirement/RequiresAtLeastNUnitsRequirement.cs	Tue Mar 29 19:53:13 2011 +0000
+++ b/api/Objects/Requirement/RequiresAtLeastNUnitsRequirement.cs	Wed Mar 30 19:09:28 2011 +0000
@@ -20,7 +20,7 @@
 
 			foreach (UnitType unitType in requiredUnitTypes)
 			{
-				AddUnitTypeRequirement(unitType, 1);
+				AddUnitTypeRequirement(unitType);
 			}
 		}
 
diff -r 17d8d357467e -r f56254f50ce5 api/Objects/Requirement/RequiresNoMoreThanNOfUnitTypeRequirement.cs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/api/Objects/Requirement/RequiresNoMoreThanNOfUnitTypeRequirement.cs	Wed Mar 30 19:09:28 2011 +0000
@@ -0,0 +1,70 @@
+// This file (RequiresNoMoreThanNOfUnitTypeRequirement.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 IBBoard.WarFoundry.API.Objects;
+using System.Collections.Generic;
+
+namespace IBBoard.WarFoundry.API.Objects.Requirement
+{
+	/// <summary>
+	/// A requirement where a WarFoundryObject cannot be taken in an army if more than N of a UnitType will be in the army.
+	/// </summary>
+	public class RequiresNoMoreThanNOfUnitTypeRequirement
+	{
+		private List<UnitCountRequirementData> limitedTypes;
+
+		public RequiresNoMoreThanNOfUnitTypeRequirement(params UnitType[] limitedUnitTypes)
+		{
+			limitedTypes = new List<UnitCountRequirementData>();
+
+			foreach (UnitType unitType in limitedUnitTypes)
+			{
+				AddUnitTypeRequirement(unitType, 0);
+			}
+		}
+
+		/// <summary>
+		/// Checks whether the supplied WarFoundryObject can be added to the supplied army.
+		/// </summary>
+		/// <returns>
+		/// <c>true</c> if the object can be added, else <c>false</c>
+		/// </returns>
+		/// <param name='wfObject'>
+		/// The object that we want to add. This may be involved in the check, or it may not affect the evaluation of the requirement
+		/// </param>
+		/// <param name='toArmy'>
+		/// The army to add the object to.
+		/// </param>
+		public bool AllowsAdding(WarFoundryObject wfObject, Army toArmy)
+		{
+			bool canAdd = true;
+
+			foreach (UnitCountRequirementData limit in limitedTypes)
+			{
+				if (toArmy.GetUnitTypeCount(limit.UnitType) > limit.Count)
+				{
+					canAdd = false;
+					break;
+				}
+			}
+
+			return canAdd;
+		}
+
+		/// <summary>
+		/// Adds a requirement for there to be at least minCount of a given UnitType
+		/// </summary>
+		/// <param name='unitType'>
+		/// The unit type to require.
+		/// </param>
+		/// <param name='minCount'>
+		/// The minimum number of that type that must exist.
+		/// </param>
+		public void AddUnitTypeRequirement(UnitType unitType, int minCount)
+		{
+			limitedTypes.Add(new UnitCountRequirementData(unitType, minCount));
+		}
+	}
+}
+