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1 // This file (UnitRequirement.cs) is a part of the IBBoard.WarFoundry.API project and is copyright 2009 IBBoard.
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2 //
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3 // The file and the library/program it is in are licensed under the GNU LGPL license, either version 3 of the License or (at your option) any later version. Please see COPYING.LGPL for more information and the full license.
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4
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5 using System;
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6 using System.Collections.Generic;
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7 using IBBoard.WarFoundry.API;
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8 using IBBoard.WarFoundry.API.Objects;
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9
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10 namespace IBBoard.WarFoundry.API.Requirements
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11 {
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12 /// <summary>
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13 /// Summary description for UnitRequirement.
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14 /// </summary>
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15 public abstract class UnitRequirement : AbstractArmyRequirement
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16 {
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17 protected UnitType unitType;
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18
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19 protected UnitRequirement(UnitType requirementFor)
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20 {
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21 unitType = requirementFor;
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22 }
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23
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24 /// <summary>
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25 /// Checks whether the specified unit type can be added to the specified army. Returns a <see cref="FailedRequirement"> obejct if a unit of that type cannot legally be added, or no failure (null) if it can be added.
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26 /// </summary>
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27 /// <param name="army">
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28 /// The <see cref="Army"/> that the unit should be checked for adding to
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29 /// </param>
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30 /// <param name="type">
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31 /// The <see cref="UnitType"/> that is being checked.
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32 /// </param>
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33 /// <returns>
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34 /// A <see cref="AbstractFailedRequirement"/> if the requirement means the <see cref="UnitType"/> cannot be legally added, else <code>null</code>.
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35 /// </returns>
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36 protected abstract AbstractFailedRequirement CanAddToArmy(Army army, UnitType type);
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37
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38 /// <summary>
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39 /// Checks whether the specified unit can be added to the specified army. Returns a <see cref="FailedRequirement"> obejct if the unit cannot legally be added, or no failure (null) if it can be added.
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40 /// </summary>
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41 /// <param name="army">
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42 /// The <see cref="Army"/> that the unit should be checked for adding to
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43 /// </param>
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44 /// <param name="type">
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45 /// The <see cref="Unit"/> that is being checked.
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46 /// </param>
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47 /// <returns>
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48 /// A <see cref="AbstractFailedRequirement"/> if the requirement means the <see cref="Unit"/> cannot be legally added, else <code>null</code>.
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49 /// </returns>
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50 protected AbstractFailedRequirement CanAddToArmy(Army army, Unit unit)
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51 {
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52 return CanAddToArmy(army, unit.UnitType);
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53 }
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54
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55 /// <summary>
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56 /// Checks whether the specified unit type can be removed from the specified army. Returns a <see cref="FailedRequirement"> obejct if a unit of that type cannot legally be removed, or no failure (null) if it can be removed.
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57 /// </summary>
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58 /// <param name="army">
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59 /// The <see cref="Army"/> that the unit should be checked for adding to
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60 /// </param>
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61 /// <param name="type">
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62 /// The <see cref="UnitType"/> that is being checked.
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63 /// </param>
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64 /// <returns>
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65 /// A <see cref="AbstractFailedRequirement"/> if the requirement means the <see cref="UnitType"/> cannot be legally added, else <code>null</code>.
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66 /// </returns>
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67 protected abstract AbstractFailedRequirement CanRemoveFromArmy(Army army, UnitType type);
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68
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69 /// <summary>
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70 /// Checks whether the specified unit can be removed from the specified army. Returns a <see cref="FailedRequirement"> obejct if the unit cannot legally be removed, or no failure (null) if it can be removed.
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71 /// </summary>
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72 /// <param name="army">
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73 /// The <see cref="Army"/> that the unit should be checked for adding to
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74 /// </param>
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75 /// <param name="type">
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76 /// The <see cref="Unit"/> that is being checked.
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77 /// </param>
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78 /// <returns>
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79 /// A <see cref="AbstractFailedRequirement"/> if the requirement means the <see cref="Unit"/> cannot be legally removed, else <code>null</code>.
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80 /// </returns>
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81 protected AbstractFailedRequirement CanRemoveFromArmy(Army army, Unit unit)
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82 {
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83 return CanRemoveFromArmy(army, unit.UnitType);
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84 }
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85
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86 protected override AbstractFailedRequirement CanAddToArmy(Army army)
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87 {
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88 return CanAddToArmy(army, unitType);
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89 }
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90
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91 protected override AbstractFailedRequirement CanRemoveFromArmy(Army army)
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92 {
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93 return CanRemoveFromArmy(army, unitType);
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94 }
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95 }
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96 }
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