Implements experience gain

PkmnLib.Dynamic/Libraries/DynamicLibrary.cs

@@ -39,6 +39,12 @@ public interface IDynamicLibrary
     /// </summary>
     ICaptureLibrary CaptureLibrary { get; }
 
+    /// <summary>
+    /// The experience gain calculator deals with the calculation of experience gained by a
+    /// Pokémon after defeating another Pokémon.
+    /// </summary>
+    IExperienceGainCalculator ExperienceGainCalculator { get; }
+
     /// <summary>
     /// A holder of the script types that can be resolved by this library.
     /// </summary>
@@ -64,12 +70,13 @@ public class DynamicLibraryImpl : IDynamicLibrary
 
         return new DynamicLibraryImpl(load.StaticLibrary, load.Registry.BattleStatCalculator!,
             load.Registry.DamageCalculator!, load.Registry.MiscLibrary!, load.Registry.CaptureLibrary!, load.Resolver,
-            load.Registry.ExplicitAIHandlers);
+            load.Registry.ExplicitAIHandlers, load.Registry.ExperienceGainCalculator!);
     }
 
     private DynamicLibraryImpl(IStaticLibrary staticLibrary, IBattleStatCalculator statCalculator,
         IDamageCalculator damageCalculator, IMiscLibrary miscLibrary, ICaptureLibrary captureLibrary,
-        ScriptResolver scriptResolver, IReadOnlyExplicitAIHandlers explicitAIHandlers)
+        ScriptResolver scriptResolver, IReadOnlyExplicitAIHandlers explicitAIHandlers,
+        IExperienceGainCalculator experienceGainCalculator)
     {
         StaticLibrary = staticLibrary;
         StatCalculator = statCalculator;
@@ -77,6 +84,7 @@ public class DynamicLibraryImpl : IDynamicLibrary
         MiscLibrary = miscLibrary;
         ScriptResolver = scriptResolver;
         ExplicitAIHandlers = explicitAIHandlers;
+        ExperienceGainCalculator = experienceGainCalculator;
         CaptureLibrary = captureLibrary;
     }
 
@@ -95,6 +103,9 @@ public class DynamicLibraryImpl : IDynamicLibrary
     /// <inheritdoc />
     public ICaptureLibrary CaptureLibrary { get; }
 
+    /// <inheritdoc />
+    public IExperienceGainCalculator ExperienceGainCalculator { get; }
+
     /// <inheritdoc />
     public ScriptResolver ScriptResolver { get; }
 

PkmnLib.Dynamic/Libraries/ExperienceGainCalculator.cs

@@ -0,0 +1,14 @@
+using PkmnLib.Dynamic.Models;
+
+namespace PkmnLib.Dynamic.Libraries;
+
+/// <summary>
+/// Calculates experience gain for Pokémon battles.
+/// </summary>
+public interface IExperienceGainCalculator
+{
+    /// <summary>
+    /// Calculates the experience a Pokémon gains when defeating another Pokémon.
+    /// </summary>
+    uint CalculateExperienceGain(IPokemon defeatedPokemon, IPokemon victoriousPokemon);
+}

PkmnLib.Dynamic/Libraries/LibraryLoader.cs

@@ -36,6 +36,8 @@ public static class LibraryLoader
             throw new InvalidOperationException("Misc library not found in plugins.");
         if (registry.CaptureLibrary is null)
             throw new InvalidOperationException("Capture library not found in plugins.");
+        if (registry.ExperienceGainCalculator is null)
+            throw new InvalidOperationException("Experience gain calculator not found in plugins.");
         var scriptResolver = new ScriptResolver(registry.ScriptTypes, registry.ItemScriptTypes);
         return new LoadResult(registry, scriptResolver, staticLibrary);
     }

PkmnLib.Dynamic/Models/Pokemon.cs

@@ -1184,6 +1184,11 @@ public class PokemonImpl : ScriptSource, IPokemon
         BattleData.BattleSide.MarkFaint(BattleData.Position);
         BattleData.BattleSide.ForceClearPokemonFromField(BattleData.Position);
 
+        foreach (var opponent in BattleData.SeenOpponents.WhereNotNull())
+        {
+            opponent.AddExperience(Library.ExperienceGainCalculator.CalculateExperienceGain(this, opponent));
+        }
+
         // Validate the battle state to see if the battle is over.
         BattleData.Battle.ValidateBattleState();
     }

PkmnLib.Dynamic/ScriptHandling/Registry/ScriptRegistry.cs

@@ -19,6 +19,7 @@ public class ScriptRegistry
     private IDamageCalculator? _damageCalculator;
     private IMiscLibrary? _miscLibrary;
     private ICaptureLibrary? _captureLibrary;
+    private IExperienceGainCalculator? _experienceGainCalculator;
 
     /// <summary>
     /// Automatically register all scripts in the given assembly that have the <see cref="ScriptAttribute"/>, and
@@ -110,11 +111,18 @@ public class ScriptRegistry
     public void RegisterCaptureLibrary<T>(T captureLibrary) where T : ICaptureLibrary =>
         _captureLibrary = captureLibrary;
 
+    /// <summary>
+    /// Register an experience gain calculator.
+    /// </summary>
+    public void RegisterExperienceGainCalculator<T>(T experienceGainCalculator) where T : IExperienceGainCalculator =>
+        _experienceGainCalculator = experienceGainCalculator;
+
     internal IReadOnlyDictionary<(ScriptCategory category, StringKey name), Func<Script>> ScriptTypes => _scriptTypes;
     internal IReadOnlyDictionary<StringKey, Func<IItem, ItemScript>> ItemScriptTypes => _itemScriptTypes;
     internal IBattleStatCalculator? BattleStatCalculator => _battleStatCalculator;
     internal IDamageCalculator? DamageCalculator => _damageCalculator;
     internal IMiscLibrary? MiscLibrary => _miscLibrary;
     internal ICaptureLibrary? CaptureLibrary => _captureLibrary;
+    internal IExperienceGainCalculator? ExperienceGainCalculator => _experienceGainCalculator;
     public ExplicitAIHandlers ExplicitAIHandlers { get; } = new();
 }