Add proxied energy storage

src/main/kotlin/ru/dbotthepony/mc/otm/capability/energy/ProxiedEnergyStorage.kt

@@ -0,0 +1,35 @@
+package ru.dbotthepony.mc.otm.capability.energy
+
+import ru.dbotthepony.mc.otm.capability.FlowDirection
+import ru.dbotthepony.mc.otm.core.math.Decimal
+
+class ProxiedEnergyStorage<T : IMatteryEnergyStorage>(var parent: T? = null) : IMatteryEnergyStorage {
+	override fun extractEnergy(howMuch: Decimal, simulate: Boolean): Decimal {
+		return parent?.extractEnergy(howMuch, simulate) ?: Decimal.ZERO
+	}
+
+	override fun receiveEnergy(howMuch: Decimal, simulate: Boolean): Decimal {
+		return parent?.receiveEnergy(howMuch, simulate) ?: Decimal.ZERO
+	}
+
+	override var batteryLevel: Decimal
+		get() = parent?.batteryLevel ?: Decimal.ZERO
+		set(value) { parent?.batteryLevel = value }
+	override val maxBatteryLevel: Decimal
+		get() = parent?.maxBatteryLevel ?: Decimal.ZERO
+	override val energyFlow: FlowDirection
+		get() = parent?.energyFlow ?: FlowDirection.NONE
+
+	override val canSetBatteryLevel: Boolean
+		get() = parent?.canSetBatteryLevel ?: false
+	override val missingPower: Decimal
+		get() = parent?.missingPower ?: Decimal.ZERO
+
+	override fun drainBattery(): Boolean {
+		return parent?.drainBattery() ?: false
+	}
+
+	override fun fillBattery(): Boolean {
+		return parent?.fillBattery() ?: false
+	}
+}