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1 // This file (UnitRequiresAtLeastNUnitsRequirement.cs) is a part of the IBBoard.WarFoundry.API project and is copyright 2011 IBBoard
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2 //
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3 // 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.
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4 using System;
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5 using System.Collections.Generic;
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6 using IBBoard.WarFoundry.API.Objects;
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7
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8 namespace IBBoard.WarFoundry.API.Objects.Requirement
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9 {
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10 /// <summary>
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11 /// A requirement where a UnitType can only be taken if there are no more than N units of one or more unit in an army.
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12 /// </summary>
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13 public class UnitRequiresNoMoreThanNOfUnitTypeRequirement : RequiresNoMoreThanNOfUnitTypeRequirement
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14 {
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15 private UnitType requirementOnType;
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16
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17 public UnitRequiresNoMoreThanNOfUnitTypeRequirement(UnitType requirementOn) : base()
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18 {
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19 requirementOnType = requirementOn;
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20 }
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21
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22 /// <summary>
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23 /// Checks whether the supplied WarFoundryObject can be added to the supplied army.
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24 /// </summary>
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25 /// <returns>
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26 /// A <code>Validation</code> enum to show the result of the validation
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27 /// </returns>
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28 /// <param name='wfObject'>
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29 /// The object that we want to add. This may be involved in the check, or it may not affect the evaluation of the requirement
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30 /// </param>
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31 /// <param name='toArmy'>
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32 /// The army to add the object to.
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33 /// </param>
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34 public override Validation AllowsAdding(WarFoundryObject wfObject, Army toArmy)
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35 {
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36 return IsApplicable(wfObject, toArmy) ? base.AllowsAdding(wfObject, toArmy) : Validation.NotApplicable;
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37 }
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38
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39
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40 private bool IsApplicable(WarFoundryObject toObject, Army toArmy)
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41 {
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42 return IsApplicable(toArmy) || IsApplicable(toObject);
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43 }
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44
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45
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46 private bool IsApplicable(Army toArmy)
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47 {
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48 return toArmy.GetUnitTypeCount(requirementOnType) > 0;
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49 }
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50
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51
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52 private bool IsApplicable(WarFoundryObject toObject)
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53 {
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54 return requirementOnType.Equals(toObject) || (toObject is Unit && requirementOnType.Equals(((Unit)toObject).UnitType));
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55 }
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56 }
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57 }
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