ported from perforce

RobotAndDonkey.Game/Intents/BuyPatch.cs

@@ -0,0 +1,34 @@
+using RobotAndDonkey.Game.Cards;
+using RobotAndDonkey.Game.Execution.Results;
+using RobotAndDonkey.Game.GameState;
+
+namespace RobotAndDonkey.Game.Intents;
+
+public class BuyPatch(Card card, bool free) : CardIntent(card, free ? 0 : card.ShopCost)
+{
+    public override void Run(Guid requestId, CoreLoop coreLoop, List<Intent> newIntents, List<Result> results)
+    {
+        coreLoop.Shop.Remove(Card);
+        coreLoop.PatchDeck.Add(Card);
+        results.Add(new ShopResult(requestId, coreLoop.Shop.ToArray()));
+        results.Add(new DeckResult(requestId, coreLoop.PatchDeck.ToArray()));
+        base.Run(requestId, coreLoop, newIntents, results);
+    }
+
+    public override bool IsValid(CoreLoop coreLoop)
+    {
+        if (!Free && !coreLoop.Shop.Contains(Card))
+            return false;
+
+        if (Free && !coreLoop.BoosterPack.Contains(Card))
+            return false;
+
+        return base.IsValid(coreLoop);
+    }
+
+    public bool Free { get; } = free;
+
+    public override bool Immune => true;
+
+    public override string ToString() => $"Buy {Card.Name}, " + base.ToString();
+}