Extract GhostSlot to separate class

src/main/kotlin/net/shadowfacts/phycon/block/inserter/InserterBlockEntity.kt

@@ -37,7 +37,7 @@ class InserterBlockEntity: DeviceBlockEntity(PhyBlockEntities.INSERTER),
 
 	private var inventory: ItemInsertable? = null
 	private var currentRequest: PendingExtractRequest? = null
-	var stackToExtract = ItemStack.EMPTY
+	var stackToExtract: ItemStack = ItemStack.EMPTY
 	var amountToExtract = 1
 	override val controller = ActivationController(SLEEP_TIME, this)
 

src/main/kotlin/net/shadowfacts/phycon/block/inserter/InserterScreenHandler.kt

@@ -2,7 +2,6 @@ package net.shadowfacts.phycon.block.inserter
 
 import net.minecraft.entity.player.PlayerEntity
 import net.minecraft.entity.player.PlayerInventory
-import net.minecraft.inventory.Inventory
 import net.minecraft.item.ItemStack
 import net.minecraft.network.PacketByteBuf
 import net.minecraft.screen.ScreenHandler
@@ -12,6 +11,7 @@ import net.minecraft.util.Identifier
 import net.shadowfacts.phycon.PhysicalConnectivity
 import net.shadowfacts.phycon.init.PhyBlocks
 import net.shadowfacts.phycon.init.PhyScreens
+import net.shadowfacts.phycon.util.GhostSlot
 import kotlin.math.min
 
 /**
@@ -27,8 +27,6 @@ class InserterScreenHandler(
 		val ID = Identifier(PhysicalConnectivity.MODID, "inserter")
 	}
 
-	private val fakeInv = FakeInventory(inserter)
-
 	constructor(syncId: Int, playerInv: PlayerInventory, buf: PacketByteBuf):
 			this(
 				syncId,
@@ -38,7 +36,7 @@ class InserterScreenHandler(
 
 	init {
 		// fake slot
-		addSlot(FakeSlot(fakeInv, 31, 20))
+		addSlot(GhostSlot(inserter::stackToExtract, 31, 20))
 
 		// player inv
 		for (y in 0 until 3) {
@@ -85,38 +83,4 @@ class InserterScreenHandler(
 		return ItemStack.EMPTY
 	}
 
-	class FakeSlot(inv: FakeInventory, x: Int, y: Int): Slot(inv, 0, x, y) {
-		override fun canInsert(stack: ItemStack) = false
-
-		override fun setStack(stack: ItemStack) {
-		}
-
-		override fun canTakeItems(player: PlayerEntity) = false
-	}
-
-	class FakeInventory(val inserter: InserterBlockEntity): Inventory {
-		override fun clear() {
-			inserter.stackToExtract = ItemStack.EMPTY
-		}
-
-		override fun size() = 1
-
-		override fun isEmpty() = inserter.stackToExtract.isEmpty
-
-		override fun getStack(i: Int): ItemStack {
-			return if (i == 0) inserter.stackToExtract else ItemStack.EMPTY
-		}
-
-		override fun removeStack(i: Int, j: Int) = ItemStack.EMPTY
-
-		override fun removeStack(i: Int) = ItemStack.EMPTY
-
-		override fun setStack(i: Int, itemStack: ItemStack?) {}
-
-		override fun markDirty() {}
-
-		override fun canPlayerUse(playerEntity: PlayerEntity?) = true
-
-	}
-
 }

src/main/kotlin/net/shadowfacts/phycon/util/GhostSlot.kt

@@ -0,0 +1,45 @@
+package net.shadowfacts.phycon.util
+
+import net.minecraft.entity.player.PlayerEntity
+import net.minecraft.inventory.Inventory
+import net.minecraft.item.ItemStack
+import net.minecraft.screen.slot.Slot
+import kotlin.reflect.KMutableProperty
+
+/**
+ * @author shadowfacts
+ */
+class GhostSlot(prop: KMutableProperty<ItemStack>, x: Int, y: Int): Slot(GhostInv(prop), 0, x, y) {
+
+	override fun canInsert(stack: ItemStack) = false
+
+	override fun setStack(itemStack: ItemStack?) {
+	}
+
+	override fun canTakeItems(player: PlayerEntity) = false
+
+	class GhostInv(private val prop: KMutableProperty<ItemStack>): Inventory {
+		override fun clear() {
+			prop.setter.call(ItemStack.EMPTY)
+		}
+
+		override fun size() = 1
+
+		override fun isEmpty() = prop.getter.call().isEmpty
+
+		override fun getStack(i: Int): ItemStack {
+			return if (i == 0) prop.getter.call()
+			else ItemStack.EMPTY
+		}
+
+		override fun removeStack(i: Int, j: Int) = ItemStack.EMPTY
+
+		override fun removeStack(i: Int) = ItemStack.EMPTY
+
+		override fun setStack(i: Int, itemStack: ItemStack) {}
+
+		override fun markDirty() {}
+
+		override fun canPlayerUse(playerEntity: PlayerEntity?) = true
+	}
+}