Adds more abilities

Plugins/PkmnLib.Plugin.Gen7/Scripts/Abilities/AuraBreak.cs

@@ -1,7 +1,32 @@
+using PkmnLib.Static.Utils;
+
 namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
 
+/// <summary>
+/// Aura Break is an ability that reverses the effects of Dark Aura and Fairy Aura.
+/// When this ability is present, Dark-type and Fairy-type moves are reduced in power by 25% instead of being boosted.
+/// 
+/// <see href="https://bulbapedia.bulbagarden.net/wiki/Aura_Break_(Ability)">Bulbapedia - Aura Break</see>
+/// </summary>
 [Script(ScriptCategory.Ability, "aura_break")]
 public class AuraBreak : Script
 {
-    // FIXME: Implement together with Dark Aura and Fairy Aura.
+    /// <inheritdoc />
+    public override void CustomTrigger(StringKey eventName, IDictionary<StringKey, object?>? parameters)
+    {
+        if (eventName != CustomTriggers.ModifyAuraEffect || parameters == null)
+            return;
+
+        if (!parameters.TryGetValue("aura_type", out var auraTypeObj) || auraTypeObj is not string auraType)
+            return;
+
+        if (auraType is "dark" or "fairy")
+        {
+            if (parameters.TryGetValue("modifier", out var modifierObj) && modifierObj is float)
+            {
+                // Reverse the aura effect by reducing power by 25%
+                parameters["modifier"] = 0.75f;
+            }
+        }
+    }
 }