Adds more abilities

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

@@ -0,0 +1,35 @@
+using PkmnLib.Static.Utils;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
+
+/// <summary>
+/// Dark Aura is an ability that increases the power of Dark-type moves by 33% for all Pokémon on the field.
+/// The effect can be modified by other abilities (such as Aura Break) via a custom script hook.
+/// 
+/// <see href="https://bulbapedia.bulbagarden.net/wiki/Dark_Aura_(Ability)">Bulbapedia - Dark Aura</see>
+/// </summary>
+[Script(ScriptCategory.Ability, "dark_aura")]
+public class DarkAura : Script
+{
+    /// <inheritdoc />
+    public override void ChangeDamageModifier(IExecutingMove move, IPokemon target, byte hit, ref float modifier)
+    {
+        if (move.GetHitData(target, hit).Type?.Name == "dark")
+        {
+            var auraModifier = 5448f / 4096f;
+            var parameters = new Dictionary<StringKey, object?>
+            {
+                ["aura_type"] = "dark",
+                ["modifier"] = auraModifier,
+            };
+            move.Battle.Sides.SelectMany(side => side.Pokemon).WhereNotNull()
+                .RunScriptHook(x => x.CustomTrigger(CustomTriggers.ModifyAuraEffect, parameters));
+            if (parameters.TryGetValue("modifier", out var modObj) && modObj is float modValue)
+            {
+                auraModifier = modValue;
+            }
+            modifier *= auraModifier;
+            move.Battle.EventHook.Invoke(new AbilityTriggerEvent(move.User));
+        }
+    }
+}