ported from perforce

RobotAndDonkey.Game/Intents/Intent.cs

@@ -0,0 +1,33 @@
+using RobotAndDonkey.Game.Cards;
+using RobotAndDonkey.Game.Execution.Results;
+using RobotAndDonkey.Game.GameState;
+using RobotAndDonkey.Game.Modifiers;
+using System;
+using System.Collections.Generic;
+
+namespace RobotAndDonkey.Game.Intents;
+
+public abstract class Intent(int energyCost = 0)
+{
+    public virtual void Run(Guid requestId, CoreLoop coreLoop, List<Intent> newIntents, List<Result> results)
+    {
+        if (EnergyCost != 0)
+        {
+            coreLoop.Currency.Energy -= EnergyCost;
+            results.Add(new CurrencyResult(requestId, coreLoop.Currency));
+        }
+    }
+
+    public virtual bool IsValid(CoreLoop coreLoop)
+    {
+        return DebuffSources.Count == 0 && coreLoop.Currency.Energy >= Math.Max(0, EnergyCost);
+    }
+
+    public int EnergyCost { get; set; } = energyCost;
+
+    public HashSet<Modifier> DebuffSources { get; } = [];
+
+    public virtual bool Immune { get; }
+
+    public override string ToString() => $"Costs {EnergyCost}" + (DebuffSources.Count > 0 ? ", debuffed" : "");
+}