move GetMatchingCards, add GetMatchingCardsCount

Game/AI/AIUtil.cs

@@ -219,11 +219,6 @@ namespace WindBot.Game.AI
             return null;
         }
 
-        public IList<ClientCard> GetMatchingCards(IList<ClientCard> cards, Func<ClientCard, bool> filter)
-        {
-            return cards.Where(card => card != null && filter(card)).ToList();
-        }
-
         public ClientCard GetPZone(int player, int id)
         {
             if (Duel.IsNewRule)

Game/AI/CardContainer.cs

@@ -116,6 +116,21 @@ namespace WindBot.Game.AI
             return cards.FirstOrDefault(card => card?.Data != null && card.IsFaceup() && filter.Invoke(card));
         }
 
+        public static IList<ClientCard> GetMatchingCards(this IEnumerable<ClientCard> cards, Func<ClientCard, bool> filter)
+        {
+            return cards.Where(card => card?.Data != null && filter.Invoke(card)).ToList();
+        }
+
+        public static int GetMatchingCardsCount(this IEnumerable<ClientCard> cards, Func<ClientCard, bool> filter)
+        {
+            return cards.Count(card => card?.Data != null && filter.Invoke(card));
+        }
+
+        public static bool IsExistingMatchingCard(this IEnumerable<ClientCard> cards, Func<ClientCard, bool> filter, int count = 1)
+        {
+            return cards.GetMatchingCardsCount(filter) >= count;
+        }
+
         public static ClientCard GetShouldBeDisabledBeforeItUseEffectMonster(this IEnumerable<ClientCard> cards, bool canBeTarget = true)
         {
             return cards.FirstOrDefault(card => card?.Data != null && card.IsMonsterShouldBeDisabledBeforeItUseEffect() && card.IsFaceup() && (!canBeTarget || !card.IsShouldNotBeTarget()));

Game/AI/Decks/RainbowExecutor.cs

@@ -211,8 +211,8 @@ namespace WindBot.Game.AI.Decks
         private bool RescueRabbitSummon()
         {
             return Util.GetBotAvailZonesFromExtraDeck() > 0
-                || Util.GetMatchingCards(Enemy.MonsterZone, card => card.GetDefensePower() >= 1900).Count == 0
-                || Util.GetMatchingCards(Enemy.MonsterZone, card => card.GetDefensePower() < 1900).Count > Util.GetMatchingCards(Bot.MonsterZone, card => card.Attack >= 1900).Count;
+                || !Enemy.MonsterZone.IsExistingMatchingCard(card => card.GetDefensePower() >= 1900)
+                || Enemy.MonsterZone.GetMatchingCardsCount(card => card.GetDefensePower() < 1900) > Bot.MonsterZone.GetMatchingCardsCount(card => card.Attack >= 1900);
         }
 
         private bool RescueRabbitEffect()