ported from perforce

RobotAndDonkey.Game/Modifiers/HeatWaveModifier.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using RobotAndDonkey.Game.Data;
+using RobotAndDonkey.Game.Execution.Results;
+using RobotAndDonkey.Game.GameState;
+using RobotAndDonkey.Game.Intents;
+
+namespace RobotAndDonkey.Game.Modifiers;
+
+public record HeatWaveModifier(EModifierDuration Duration) : Modifier(EModifierKind.Robot, EModifierId.HeatWave, Duration)
+{
+    protected override HeatWaveModifier CreateInstance() => new(Duration);
+
+    public override void OnAdded(Entity owner, List<Intent> newIntents)
+    {
+        newIntents.Add(new ModifyCurrency(new(-Balancing.Instance.HeatWaveEnergyPenalty, 0, 0, 0, 0, 0)));
+    }
+
+    public override void OnRemoved(Entity owner, List<Intent> newIntents)
+    {
+        newIntents.Add(new ModifyCurrency(new(Balancing.Instance.HeatWaveEnergyPenalty, 0, 0, 0, 0, 0)));
+    }
+
+    public override string ToolTip => $"Heat wave: immediate −{Balancing.Instance.HeatWaveEnergyPenalty} Energy (temporary).";
+}