a bit more stuff

Scripts/EnergyManager.cs

@@ -0,0 +1,29 @@
+using System.Collections.Generic;
+using System.Linq;
+using Godot;
+
+namespace NodeWar.Scripts;
+
+[Singleton]
+public partial class EnergyManager
+{
+	public List<EnergyProducer> EnergyProducers { get; set; } = []; // TODO: privat set
+
+	public float GetTotalEnergyCapacity()
+	{
+		// TODO: cache + dirty flag
+		return EnergyProducers.Sum(energyProducer => energyProducer.EnergyCapacity);
+	}
+
+	public float GetEnergyGeneration()
+	{
+		// TODO: cache + dirty flag
+		return EnergyProducers.Sum(energyProducer => energyProducer.EnergyGenerationRate);
+	}
+
+	public float GetEnergyStored()
+	{
+		// TODO: cache + dirty flag
+		return EnergyProducers.Sum(energyProducer => energyProducer.EnergyStored);
+	}
+}