Even more abilities

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

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+namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
+
+/// <summary>
+/// Healer is an ability that may heal an ally's status condition at the end of each turn in a double battle.
+///
+/// <see href="https://bulbapedia.bulbagarden.net/wiki/Healer_(Ability)">Bulbapedia - Healer</see>
+/// </summary>
+[Script(ScriptCategory.Ability, "healer")]
+public class Healer : Script
+{
+    private IPokemon? _pokemon;
+
+    /// <inheritdoc />
+    public override void OnAddedToParent(IScriptSource source)
+    {
+        if (source is not IPokemon pokemon)
+            throw new InvalidOperationException("Harvest can only be added to a Pokemon script source.");
+        _pokemon = pokemon;
+    }
+
+    /// <inheritdoc />
+    public override void OnEndTurn(IBattle battle)
+    {
+        if (_pokemon?.BattleData is null)
+            return;
+
+        if (_pokemon.BattleData.Position > 0)
+        {
+            var leftAlly = _pokemon.BattleData.BattleSide.Pokemon[_pokemon.BattleData.Position - 1];
+            TryClearStatus(battle, leftAlly);
+        }
+        if (_pokemon.BattleData.Position < _pokemon.BattleData.BattleSide.Pokemon.Count - 1)
+        {
+            var rightAlly = _pokemon.BattleData.BattleSide.Pokemon[_pokemon.BattleData.Position + 1];
+            TryClearStatus(battle, rightAlly);
+        }
+    }
+
+    private static void TryClearStatus(IBattle battle, IPokemon? leftAlly)
+    {
+        if (leftAlly is null)
+            return;
+        if (leftAlly.StatusScript.IsEmpty)
+            return;
+        var rng = battle.Random;
+        if (rng.GetInt(3) != 0) // 1 in 3 chance to heal
+            return;
+        battle.EventHook.Invoke(new AbilityTriggerEvent(leftAlly));
+        leftAlly.ClearStatus();
+    }
+}