Implement more stable WorkbenchBlockEntity, add buttons and GUIs, placement order components and dynamic registries, attachable inventories

src/main/java/net/sys42/dakedres/grafting/Grafting.java

@@ -1,39 +1,57 @@
 package net.sys42.dakedres.grafting;
 
+import com.mojang.serialization.Codec;
 import eu.pb4.polymer.core.api.block.PolymerBlockUtils;
-import eu.pb4.polymer.resourcepack.api.PolymerModelData;
+import eu.pb4.polymer.core.api.other.PolymerComponent;
 import eu.pb4.polymer.resourcepack.api.PolymerResourcePackUtils;
 import net.fabricmc.api.ModInitializer;
 
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
+import net.fabricmc.fabric.api.event.registry.DynamicRegistries;
+import net.fabricmc.fabric.api.event.registry.FabricRegistryBuilder;
+import net.fabricmc.fabric.api.event.registry.RegistryAttribute;
 import net.fabricmc.fabric.api.object.builder.v1.block.entity.FabricBlockEntityTypeBuilder;
 import net.minecraft.block.AbstractBlock;
 import net.minecraft.block.Block;
+import net.minecraft.block.Blocks;
 import net.minecraft.block.entity.BlockEntityType;
+import net.minecraft.component.ComponentType;
 import net.minecraft.item.BlockItem;
 import net.minecraft.item.Item;
-import net.minecraft.item.ItemStack;
+import net.minecraft.registry.*;
-import net.minecraft.item.Items;
+import net.minecraft.resource.Resource;
-import net.minecraft.registry.Registries;
-import net.minecraft.registry.Registry;
 import net.minecraft.sound.BlockSoundGroup;
 import net.minecraft.util.Identifier;
-import net.sys42.dakedres.grafting.blocks.Workbench;
+import net.sys42.dakedres.grafting.block.Workbench;
-import net.sys42.dakedres.grafting.blocks.WorkbenchBlockEntity;
+import net.sys42.dakedres.grafting.block.entity.WorkbenchBlockEntity;
+import net.sys42.dakedres.grafting.data.PlacementOrder;
+import net.sys42.dakedres.grafting.data.PlacementOrderReloadListener;
+import net.sys42.dakedres.grafting.item.WorkbenchItem;
+import net.sys42.dakedres.grafting.ui.Icons;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Map;
+import java.util.stream.IntStream;
+
 public class Grafting implements ModInitializer {
 	public static final String MOD_ID = "grafting";
+	public static final Identifier WORKBENCH_ID = Identifier.of(Grafting.MOD_ID, "workbench");
+	public static final Identifier PLACEMENT_ORDER_COMPONENT_ID = Identifier.of(Grafting.MOD_ID, "placement_order");
 
 	// This logger is used to write text to the console and the log file.
 	// It is considered best practice to use your mod id as the logger's name.
 	// That way, it's clear which mod wrote info, warnings, and errors.
 	public static final Logger LOGGER = LoggerFactory.getLogger(MOD_ID);
 
-	public static final Identifier WORKBENCH_ID = Identifier.of(Grafting.MOD_ID, "workbench");
 	public static final Block WORKBENCH = Registry.register(
 			Registries.BLOCK, WORKBENCH_ID,
-			new Workbench(AbstractBlock.Settings.create().sounds(BlockSoundGroup.WOOD))
+			new Workbench(
+					// TODO: A bit easier to break?
+					Block.Settings.copy(Blocks.CRAFTING_TABLE)
+			)
 	);
 	public static final BlockEntityType<WorkbenchBlockEntity> WORKBENCH_BLOCK_ENTITY_TYPE = Registry.register(
 			Registries.BLOCK_ENTITY_TYPE,
@@ -42,9 +60,20 @@ public class Grafting implements ModInitializer {
 	);
 	public static final BlockItem WORKBENCH_ITEM = Registry.register(
 			Registries.ITEM, WORKBENCH_ID,
-			new Workbench.WorkbenchItem(WORKBENCH, new Item.Settings())
+			new WorkbenchItem(WORKBENCH, new Item.Settings())
 	);
 
+	public static final ComponentType<Identifier> PLACEMENT_ORDER_COMPONENT_TYPE = Registry.register(
+			Registries.DATA_COMPONENT_TYPE,
+			PLACEMENT_ORDER_COMPONENT_ID,
+			ComponentType.<Identifier>builder().codec(Identifier.CODEC).build()
+	);
+
+	public static final RegistryKey<Registry<PlacementOrder>> PLACEMENT_ORDER_REGISTRY_KEY = RegistryKey.ofRegistry(Identifier.of(Grafting.MOD_ID, "placement_order"));
+//	public static final Registry<PlacementOrder> PLACEMENT_ORDER_REGISTRY = FabricRegistryBuilder.createSimple(PLACEMENT_ORDER_REGISTRY_KEY)
+//			.attribute(RegistryAttribute.MODDED)
+//			.buildAndRegister();
+
 	@Override
 	public void onInitialize() {
 		// This code runs as soon as Minecraft is in a mod-load-ready state.
@@ -54,6 +83,11 @@ public class Grafting implements ModInitializer {
 		LOGGER.info("Hello Fabric world!");
 
 		PolymerBlockUtils.registerBlockEntity(WORKBENCH_BLOCK_ENTITY_TYPE);
+		PolymerComponent.registerDataComponent(PLACEMENT_ORDER_COMPONENT_TYPE);
+		Icons.init(); // Static initialization
+//		PlacementOrderReloadListener.init();
+
+		DynamicRegistries.register(PLACEMENT_ORDER_REGISTRY_KEY, PlacementOrder.CODEC);
 
 		if (PolymerResourcePackUtils.addModAssets(MOD_ID)) {
 			LOGGER.info("Successfully added mod assets for " + MOD_ID);

src/main/java/net/sys42/dakedres/grafting/PlacementUtils.java

@@ -1,6 +1,11 @@
 package net.sys42.dakedres.grafting;
 
-public class PlacementMatrixUtils {
+import net.minecraft.item.ItemStack;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.util.Identifier;
+import net.sys42.dakedres.grafting.data.PlacementOrder;
+
+public class PlacementUtils {
 	public static final int[][] ROTATION_MATRICES = {
 			{ 0,1,2,3,4,5,6,7,8 },
 			{ 1,2,5,0,4,8,3,6,7 },
@@ -33,6 +38,10 @@ public class PlacementMatrixUtils {
 	}
 
 	public static int[] rotate(int[] matrix, int rotation) {
+		if(rotation == 0) {
+			return matrix;
+		}
+
 		int[] o = new int[matrix.length];
 		int[] rotationMatrix = ROTATION_MATRICES[rotation];
 
@@ -43,12 +52,34 @@ public class PlacementMatrixUtils {
 		return o;
 	}
 
-	public static int[] getPlacements() {
+	public static int[] getPlacements(ItemStack itemStack, ServerWorld world) {
-		int[] placements = {
+//		int[] placements = {
-				2,0,8,
+//				2,0,8,
-				1,3,4,
+//				1,3,4,
-				7,6,5
+//				7,6,5
-		};
+//		};
+//		return placements;
+
+
+		return getPlacementOrder(itemStack, world).getOrderMatrix();
+	}
+
+	public static PlacementOrder getPlacementOrder(ItemStack itemStack, ServerWorld world) {
+		Identifier placementIdentifier = itemStack.get(Grafting.PLACEMENT_ORDER_COMPONENT_TYPE);
+
+		if(placementIdentifier == null) {
+			placementIdentifier = PlacementOrder.DEFAULT_ID;
+		}
+
+		PlacementOrder placementOrder = world.getRegistryManager().get(Grafting.PLACEMENT_ORDER_REGISTRY_KEY).get(placementIdentifier);
+		if(placementOrder == null) {
+			return PlacementOrder.DEFAULT_FALLBACK;
+		}
+
+		return placementOrder;
+	};
+
+	public static int[] asIndexes(int[] placements) {
 		int[] out = new int[9];
 
 		for(int i = 0; i < 9; i++) {

src/main/java/net/sys42/dakedres/grafting/block/Workbench.java

@@ -0,0 +1,92 @@
+package net.sys42.dakedres.grafting.block;
+
+import com.mojang.serialization.MapCodec;
+import eu.pb4.polymer.blocks.api.BlockModelType;
+import eu.pb4.polymer.blocks.api.PolymerBlockModel;
+import eu.pb4.polymer.blocks.api.PolymerBlockResourceUtils;
+import eu.pb4.polymer.blocks.api.PolymerTexturedBlock;
+import eu.pb4.polymer.core.api.block.PolymerBlock;
+import net.minecraft.block.*;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.fluid.FluidState;
+import net.minecraft.fluid.Fluids;
+
+import net.minecraft.item.ItemPlacementContext;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.state.StateManager;
+import net.minecraft.state.property.Property;
+import net.minecraft.util.ActionResult;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.hit.BlockHitResult;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import net.minecraft.world.WorldAccess;
+import net.sys42.dakedres.grafting.Grafting;
+import net.sys42.dakedres.grafting.block.entity.WorkbenchBlockEntity;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import static net.minecraft.state.property.Properties.WATERLOGGED;
+
+// TODO: Loot tables, including dropping contents when broken
+public class Workbench extends BlockWithEntity implements PolymerBlock, Waterloggable, PolymerTexturedBlock {
+	private final BlockState waterloggedModel;
+	private final BlockState model;
+
+	public Workbench(Settings settings) {
+		super(settings);
+		this.setDefaultState(this.getDefaultState().with(WATERLOGGED, false));
+
+		var model = PolymerBlockModel.of(Identifier.of(Grafting.MOD_ID, "block/workbench"));
+		this.model = PolymerBlockResourceUtils.requestBlock(BlockModelType.TRANSPARENT_BLOCK, model);
+		waterloggedModel = PolymerBlockResourceUtils.requestBlock(BlockModelType.TRANSPARENT_BLOCK_WATERLOGGED, model);
+	}
+
+	@Override
+	protected MapCodec<? extends BlockWithEntity> getCodec() {
+		return createCodec(Workbench::new);
+	}
+
+	@Override
+	public @Nullable BlockEntity createBlockEntity(BlockPos pos, BlockState state) {
+		return new WorkbenchBlockEntity(pos, state);
+	}
+
+	@Override
+	public BlockState getPolymerBlockState(BlockState state) {
+		return state.get(WATERLOGGED) ? waterloggedModel : model;
+	}
+
+	// Just so it plays the right break sound
+	@Override
+	public BlockState getPolymerBreakEventBlockState(BlockState state, ServerPlayerEntity player) {
+		return Blocks.CRAFTING_TABLE.getDefaultState();
+	}
+
+	@Nullable
+	public BlockState getPlacementState(@NotNull ItemPlacementContext ctx) {
+		WorldAccess worldAccess = ctx.getWorld();
+		BlockPos blockPos = ctx.getBlockPos();
+		return this.getDefaultState().with(WATERLOGGED, worldAccess.getFluidState(blockPos).getFluid() == Fluids.WATER);
+	}
+
+	protected FluidState getFluidState(BlockState state) {
+		return state.get(WATERLOGGED) ? Fluids.WATER.getStill(false) : super.getFluidState(state);
+	}
+
+	protected void appendProperties(StateManager.Builder<Block, BlockState> builder) {
+		builder.add(new Property[]{WATERLOGGED});
+	}
+
+	@Override
+	protected ActionResult onUse(BlockState state, World world, BlockPos pos, PlayerEntity player, BlockHitResult hit) {
+		if(!player.isSneaking() && world.getBlockEntity(pos) instanceof WorkbenchBlockEntity blockEntity) {
+//			((ServerPlayerEntity) player).openHandledScreen(blockEntity);
+			blockEntity.openMenu((ServerPlayerEntity) player);
+			return ActionResult.SUCCESS;
+		}
+
+		return super.onUse(state, world, pos, player, hit);
+	}
+}

src/main/java/net/sys42/dakedres/grafting/block/entity/AttachedInventory.java

@@ -0,0 +1,43 @@
+package net.sys42.dakedres.grafting.block.entity;
+
+import eu.pb4.sgui.api.gui.SimpleGui;
+import net.minecraft.inventory.Inventory;
+import net.minecraft.screen.GenericContainerScreenHandler;
+import net.minecraft.screen.ScreenHandlerType;
+import net.minecraft.screen.slot.Slot;
+
+public class AttachedInventory {
+	private Inventory inventory;
+	public AttachedInventory(Inventory inventory) {
+		this.inventory = inventory;
+	}
+
+	public static boolean valid(Inventory inventory) {
+		return inventory.size() >= 9 && (inventory.size() % 9) == 0;
+	}
+
+	public int rows() {
+		return Math.min(inventory.size() / 9, 2);
+	}
+
+	public ScreenHandlerType<GenericContainerScreenHandler> extendedScreenHandlerType(int basis) {
+		int r = rows() + basis;
+
+		if(r <= 2) {
+			return ScreenHandlerType.GENERIC_9X3;
+		} else if(r == 3) {
+			return ScreenHandlerType.GENERIC_9X4;
+		} else if(r == 4) {
+			return ScreenHandlerType.GENERIC_9X5;
+		} else {
+			return ScreenHandlerType.GENERIC_9X6;
+		}
+	}
+
+	public void redirectSlots(int basis, SimpleGui gui) {
+		int sizeBefore = (basis + 1) * 9;
+		for(int i = 0; i < rows() * 9; i++) {
+			gui.setSlotRedirect(sizeBefore + i, new Slot(inventory, i, i, 0));
+		}
+	}
+}

src/main/java/net/sys42/dakedres/grafting/block/entity/OrderedContainer.java

@@ -0,0 +1,215 @@
+package net.sys42.dakedres.grafting.block.entity;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.block.entity.BlockEntityType;
+import net.minecraft.inventory.Inventory;
+import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NbtCompound;
+import net.minecraft.nbt.NbtList;
+import net.minecraft.registry.RegistryWrapper;
+import net.minecraft.util.math.BlockPos;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public abstract class OrderedContainer extends BlockEntity implements Inventory {
+	private final int size;
+	private final ArrayList<ItemStack> inventory;
+	public OrderedContainer(BlockEntityType<?> type, BlockPos pos, BlockState state, int size) {
+		super(type, pos, state);
+		this.size = size;
+		this.inventory = new ArrayList<>(size);
+	}
+
+	protected void readNbt(NbtCompound nbt, RegistryWrapper.WrapperLookup registries) {
+		super.readNbt(nbt, registries);
+		readInventoryNbt(nbt, registries);
+	}
+
+	private void readInventoryNbt(NbtCompound nbt, RegistryWrapper.WrapperLookup registries) {
+		NbtList nbtList = nbt.getList("Items", 10);
+
+		for(int i = 0; i < nbtList.size(); ++i) {
+			NbtCompound nbtCompound = nbtList.getCompound(i);
+			inventory.add((ItemStack) ItemStack.fromNbt(registries, nbtCompound).orElse(ItemStack.EMPTY));
+		}
+	}
+
+	protected void writeNbt(NbtCompound nbt, RegistryWrapper.WrapperLookup registries) {
+		super.writeNbt(nbt, registries);
+		writeInventoryNbt(nbt, registries);
+	}
+
+	private void writeInventoryNbt(NbtCompound nbt, RegistryWrapper.WrapperLookup registries) {
+		NbtList nbtList = new NbtList();
+
+		for (ItemStack itemStack : inventory) {
+			if (!itemStack.isEmpty()) {
+				NbtCompound nbtCompound = new NbtCompound();
+				nbtList.add(itemStack.encode(registries, nbtCompound));
+			}
+		}
+
+		nbt.put("Items", nbtList);
+	}
+
+	@Override
+	public int size() {
+		return size;
+	}
+
+	@Override
+	public boolean isEmpty() {
+		return inventory.isEmpty();
+	}
+
+	public int filledSlots() {
+		return inventory.size();
+	}
+
+	public boolean hasRoom() {
+		return filledSlots() < size;
+	}
+
+	private boolean validSlot(int slot) {
+		return slot >= 0 && slot < filledSlots();
+	}
+
+	@Override
+	public ItemStack getStack(int slot) {
+		if(validSlot(slot)) {
+			return inventory.get(slot);
+		} else {
+			return ItemStack.EMPTY;
+		}
+	}
+
+	// Sometimes Inventory#removeStack will be called in response to the
+	// count being 0, but not always. Here we check if that is the case
+	// before pulling the newest item.
+	//
+	// This is undesired behavior (as it allows the user to remove items
+	// that are not at the top of the stack), and should be avoided. This
+	// method prevents the side effects from being even worse, however.
+	private ItemStack checkSlot(int slot) {
+		if(!validSlot(slot)) {
+			return ItemStack.EMPTY;
+		}
+
+		ItemStack stack = this.getStack(slot);
+
+		if(stack.isEmpty()) {
+			inventory.remove(slot);
+			this.markDirty();
+			return stack;
+		}
+
+		return stack;
+	}
+
+	@Override
+	public ItemStack removeStack(int slot, int amount) {
+		ItemStack stack = checkSlot(slot);
+
+		if(stack.isEmpty() || amount <= 0) {
+			return stack;
+		}
+
+		if(amount <= stack.getCount()) {
+			return stack.split(amount);
+		}
+
+		return  ItemStack.EMPTY;
+	}
+
+	@Override
+	public ItemStack removeStack(int slot) {
+		ItemStack stack = checkSlot(slot);
+
+		if(stack.isEmpty()) {
+			return stack;
+		}
+
+		return pullStack();
+	}
+
+	@Override
+	public void setStack(int slot, ItemStack stack) {
+		if(stack.isEmpty()) {
+			if(validSlot(slot) && this.getStack(slot).isEmpty()) {
+				inventory.remove(slot);
+				this.markDirty();
+			}
+			return;
+		}
+
+		if(slot >= this.filledSlots()) {
+			pushStack(stack);
+		} else {
+			this.inventory.set(slot, stack);
+		}
+
+		markDirty();
+	}
+
+	public void pushStack(ItemStack stack) {
+		if(stack.isEmpty()) {
+			return;
+		}
+
+		if(hasRoom()) {
+			inventory.add(stack);
+			markDirty();
+		}
+	}
+
+	public ItemStack pullStack() {
+		if(this.filledSlots() > 0) {
+			ItemStack o = inventory.removeLast();
+			markDirty();
+			return o;
+		} else {
+			return ItemStack.EMPTY;
+		}
+	}
+
+	public boolean hasItemsLike(ItemStack stack) {
+		for(ItemStack itemStack : inventory) {
+			if(ItemStack.areItemsAndComponentsEqual(itemStack, stack)) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	@Override
+	public void clear() {
+		inventory.clear();
+	}
+
+	public List<ItemStack> getHeldStacks() {
+		return inventory;
+	}
+
+	private void clean() {
+		for(int i = 0; i < inventory.size(); i++) {
+			if(inventory.get(i).isEmpty()) {
+				inventory.remove(i);
+				i--;
+			}
+		}
+	}
+
+	//TODO: Implement according to LockedContainer
+	@Override
+	public void markDirty() {
+		clean();
+		super.markDirty();
+	}
+
+	public ItemStack topStack() {
+		return this.inventory.getLast();
+	}
+}

src/main/java/net/sys42/dakedres/grafting/block/entity/WorkbenchBlockEntity.java

@@ -0,0 +1,400 @@
+package net.sys42.dakedres.grafting.block.entity;
+
+import eu.pb4.polymer.resourcepack.api.PolymerModelData;
+import eu.pb4.sgui.api.ClickType;
+import eu.pb4.sgui.api.elements.GuiElement;
+import eu.pb4.sgui.api.gui.SimpleGui;
+import eu.pb4.sgui.virtual.inventory.VirtualSlot;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.CrafterBlock;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.entity.player.PlayerInventory;
+import net.minecraft.inventory.CraftingResultInventory;
+import net.minecraft.inventory.Inventory;
+import net.minecraft.inventory.RecipeInputInventory;
+import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NbtCompound;
+import net.minecraft.recipe.RecipeMatcher;
+import net.minecraft.recipe.input.CraftingRecipeInput;
+import net.minecraft.registry.RegistryWrapper;
+import net.minecraft.screen.ScreenHandler;
+import net.minecraft.screen.ScreenHandlerType;
+import net.minecraft.screen.slot.CraftingResultSlot;
+import net.minecraft.screen.slot.Slot;
+import net.minecraft.screen.slot.SlotActionType;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.text.Style;
+import net.minecraft.text.Text;
+import net.minecraft.util.Formatting;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.collection.DefaultedList;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import net.sys42.dakedres.grafting.Grafting;
+import net.sys42.dakedres.grafting.PlacementUtils;
+import net.sys42.dakedres.grafting.ui.Icons;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+
+public class WorkbenchBlockEntity extends OrderedContainer {
+	public static final String NBT_ORIENTATION_KEY = "CraftingOrientation";
+	public static final int GRID_AREA = 9;
+	public static final int GRID_SIZE = 3;
+
+	private int craftingOrientation = 0;
+	private final OrderedRecipeInventory recipeInventory = new OrderedRecipeInventory();
+	private final ArrayList<Gui> guis = new ArrayList<>();
+	public WorkbenchBlockEntity(BlockPos blockPos, BlockState blockState) {
+		super(Grafting.WORKBENCH_BLOCK_ENTITY_TYPE, blockPos, blockState, GRID_AREA);
+	}
+
+	@Override
+	public boolean canPlayerUse(PlayerEntity player) {
+		return false;
+	}
+
+//	@Override
+//	public Text getDisplayName() {
+//		// TODO: Localize
+//		return Text.of("ASDF??");
+//	}
+//
+//	@Override
+//	public @Nullable ScreenHandler createMenu(int syncId, PlayerInventory playerInventory, PlayerEntity player) {
+//		return new Gui((ServerPlayerEntity) player)
+//				.openAsScreenHandler(syncId, playerInventory, player);
+//	}
+
+	public void openMenu(ServerPlayerEntity player) {
+		Optional<AttachedInventory> attachedInventory = Optional.empty();
+
+		for(BlockPos p : new BlockPos[]{
+				pos.north(1),
+				pos.east(1),
+				pos.south(1),
+				pos.west(1)
+		}) {
+			assert world != null;
+			BlockEntity be = world.getBlockEntity(p);
+			if(
+					!(be instanceof WorkbenchBlockEntity) && // It gets annoying
+					be instanceof Inventory &&
+					AttachedInventory.valid((Inventory) be)
+			) {
+				attachedInventory = Optional.of(new AttachedInventory((Inventory) be));
+			}
+		}
+
+		new Gui(player, attachedInventory).open();
+	}
+
+	@Override
+	public void markDirty() {
+		for(Gui gui : guis) {
+			gui.updateResult();
+		}
+		super.markDirty();
+	}
+
+	@Override
+	protected void writeNbt(NbtCompound nbt, RegistryWrapper.WrapperLookup registries) {
+		super.writeNbt(nbt, registries);
+		nbt.putByte(NBT_ORIENTATION_KEY, (byte) craftingOrientation);
+	}
+
+	@Override
+	protected void readNbt(NbtCompound nbt, RegistryWrapper.WrapperLookup registries) {
+		super.readNbt(nbt, registries);
+		craftingOrientation = nbt.getByte(NBT_ORIENTATION_KEY);
+	}
+
+	public ItemStack getResult(ServerPlayerEntity player) {
+		World world = player.getWorld();
+		CraftingRecipeInput craftingRecipeInput = recipeInventory.createRecipeInput();
+		return CrafterBlock.getCraftingRecipe(world, craftingRecipeInput)
+				.map(recipe -> recipe.value()
+						.craft(craftingRecipeInput, world.getRegistryManager())
+				)
+				.orElse(ItemStack.EMPTY);
+	}
+
+	public void rotate(int amount) {
+		craftingOrientation = PlacementUtils.clampRotation(craftingOrientation + amount);
+		markDirty();
+	}
+
+	public class OrderedRecipeInventory implements RecipeInputInventory {
+		public int[] getRotatedPlacementIndexes(int slot) {
+			return PlacementUtils.asIndexes(
+					PlacementUtils.rotate(
+							PlacementUtils.getPlacements(WorkbenchBlockEntity.this.getStack(slot), (ServerWorld) world),
+							craftingOrientation
+					)
+			);
+		}
+
+		@Override
+		public List<ItemStack> getHeldStacks() {
+			DefaultedList<ItemStack> stacks = DefaultedList.ofSize(size(), ItemStack.EMPTY);
+
+			for(int i = 0; i < filledSlots(); i++) {
+				int[] placements = getRotatedPlacementIndexes(i);
+
+				for (int slot : placements) {
+					if(stacks.get(slot).isEmpty()) {
+						stacks.set(slot, WorkbenchBlockEntity.this.getStack(i));
+						break;
+					}
+				}
+			}
+
+			return stacks;
+		}
+
+		private int getOrderedSlot(int positionalSlot) {
+			boolean[] filledSlotMatrix = new boolean[size()];
+			Arrays.fill(filledSlotMatrix, false);
+
+			for(int i = 0; i <= filledSlots(); i++) {
+				int[] placements = getRotatedPlacementIndexes(i);
+
+				for (int slot : placements) {
+					if (slot == positionalSlot) {
+						return i;
+					}
+
+					if (!filledSlotMatrix[slot]) {
+						filledSlotMatrix[slot] = true;
+						break;
+					}
+				}
+			}
+
+			return -1;
+		}
+
+		@Override
+		public int getWidth() {
+			return GRID_SIZE;
+		}
+
+		@Override
+		public int getHeight() {
+			return GRID_SIZE;
+		}
+
+		@Override
+		public int size() {
+			return WorkbenchBlockEntity.this.size();
+		}
+
+		@Override
+		public boolean isEmpty() {
+			return WorkbenchBlockEntity.this.isEmpty();
+		}
+
+		@Override
+		public ItemStack getStack(int slot) {
+			return WorkbenchBlockEntity.this.getStack(getOrderedSlot(slot));
+		}
+
+		@Override
+		public ItemStack removeStack(int slot, int amount) {
+			return WorkbenchBlockEntity.this.removeStack(getOrderedSlot(slot), amount);
+		}
+
+		@Override
+		public ItemStack removeStack(int slot) {
+			return WorkbenchBlockEntity.this.removeStack(getOrderedSlot(slot));
+		}
+
+		@Override
+		public void setStack(int slot, ItemStack stack) {
+			int orderedSlot = getOrderedSlot(slot);
+			if(orderedSlot == -1) {
+				pushStack(stack);
+			} else {
+				WorkbenchBlockEntity.this.setStack(orderedSlot, stack);
+			}
+		}
+
+		@Override
+		public void markDirty() {
+			WorkbenchBlockEntity.this.markDirty();
+		}
+
+		@Override
+		public boolean canPlayerUse(PlayerEntity player) {
+			return WorkbenchBlockEntity.this.canPlayerUse(player);
+		}
+
+		@Override
+		public void provideRecipeInputs(RecipeMatcher finder) {
+			for(ItemStack itemStack : this.getHeldStacks()) {
+				finder.addUnenchantedInput(itemStack);
+			}
+		}
+
+		@Override
+		public void clear() {
+			WorkbenchBlockEntity.this.clear();
+		}
+	}
+
+	public class Gui extends SimpleGui {
+		private static final int BUTTON_COLUMN = 1;
+		private static final int GRID_START_COLUMN = BUTTON_COLUMN + 1;
+		private static final int RESULT_COLUMN = GRID_START_COLUMN + GRID_SIZE + 2;
+		private static final int BASE_HEIGHT = 3;
+
+		private static final Identifier GUI_FONT_ID = Identifier.of(Grafting.MOD_ID, "workbench_gui");
+
+		private final CraftingResultInventory resultInventory = new CraftingResultInventory();
+		private boolean attachedInventory;
+		public Gui(ServerPlayerEntity player) {
+			this(player, Optional.empty());
+		}
+
+		public Gui(ServerPlayerEntity player, Optional<AttachedInventory> attachedInventory) {
+			super(
+					attachedInventory.isEmpty() ?
+							ScreenHandlerType.GENERIC_9X3 :
+							attachedInventory.get().extendedScreenHandlerType(BASE_HEIGHT),
+					player,
+					false
+			);
+			guis.add(this);
+
+			setTitle(
+					Text.empty()
+							.append(Text.literal(attachedInventory.isEmpty() ? "-0." : "-1.").setStyle(Style.EMPTY.withFont(GUI_FONT_ID).withColor(Formatting.WHITE)))
+							.append(Text.translatable("container.crafting"))
+			);
+
+			setSlot(BUTTON_COLUMN, new RotateGridButton(Icons.ROTATE_CLOCKWISE,1));
+			setSlot(BUTTON_COLUMN + 9, new RotateGridButton(Icons.ROTATE_COUNTER_CLOCKWISE, -1));
+			setSlotRedirect(
+					RESULT_COLUMN + 9,
+					new CraftingResultGridSlot(player, recipeInventory, resultInventory, 0, 0, 0)
+			);
+			for(int i = 0; i < GRID_AREA; i++) {
+				int row = (i / GRID_SIZE);
+				setSlotRedirect(
+						GRID_START_COLUMN + (i % GRID_SIZE) + (row * 9),
+						new GridSlot(i)
+				);
+			}
+
+			attachedInventory.ifPresent(inventory -> {
+				inventory.redirectSlots(BASE_HEIGHT, this);
+			});
+
+			updateResult();
+		}
+
+		@Override
+		public void close() {
+			guis.remove(this);
+			super.close();
+		}
+
+		protected void updateResult() {
+			resultInventory.setStack(0, getResult(player));
+		}
+
+		@Override
+		public ItemStack quickMove(int index) {
+			ItemStack returnStack = ItemStack.EMPTY;
+			Slot slot = this.getSlotRedirectOrPlayer(index);
+
+			if(slot != null && slot.hasStack() && !(slot instanceof VirtualSlot)) {
+				ItemStack operatingStack;
+
+				if(slot instanceof GridSlot) {
+					operatingStack = topStack();
+				} else {
+					operatingStack = slot.getStack();
+				}
+				returnStack = operatingStack.copy();
+
+				if(index < this.getVirtualSize()) {
+					if(!this.insertItem(operatingStack, this.getVirtualSize(), this.getVirtualSize() + 36, true)) {
+						return ItemStack.EMPTY;
+					}
+				} else if (!this.insertItem(operatingStack, 0, this.getVirtualSize(), false)) {
+					return ItemStack.EMPTY;
+				}
+
+				if (operatingStack.isEmpty()) {
+					slot.setStack(ItemStack.EMPTY);
+				} else {
+					slot.markDirty();
+				}
+			} else if (slot instanceof VirtualSlot) {
+				return slot.getStack();
+			}
+
+			return returnStack;
+		}
+
+		//		- Inserting single items changes the shape
+		//		- Inserting a full stack will attempt to distribute the stack, or insert if that stack isn't in the workbench
+		public class GridSlot extends Slot {
+			public GridSlot(int index) {
+				super(WorkbenchBlockEntity.this.recipeInventory, index, index, 0);
+			}
+
+//			@Override
+//			public ItemStack insertStack(ItemStack stack, int count) {
+//
+//				if(stack.isEmpty()) {
+//					return stack;
+//				}
+//
+//				int allowedCount = Math.min(count, stack.getCount());
+//				if(
+//						(!hasItemsLike(stack) || count == 1) &&
+//								WorkbenchBlockEntity.this.hasRoom()
+//				) {
+//					pushStack(stack.split(allowedCount));
+//				}
+//
+//				return stack;
+//			}
+		}
+
+		public class CraftingResultGridSlot extends CraftingResultSlot {
+			public CraftingResultGridSlot(PlayerEntity player, RecipeInputInventory input, Inventory inventory, int index, int x, int y) {
+				super(player, input, inventory, index, x, y);
+			}
+
+			@Override
+			public void onTakeItem(PlayerEntity player, ItemStack stack) {
+				super.onTakeItem(player, stack);
+				WorkbenchBlockEntity.this.markDirty(); // Make sure the OrderedContainer gets cleaned so that everything is in its rightful place
+			}
+		}
+
+		public class RotateGridButton extends GuiElement {
+			public RotateGridButton(PolymerModelData model, int bias) {
+				super(
+						Icons.getStack(model),
+						new ItemClickCallback() {
+							@Override
+							public void click(int i, ClickType clickType, SlotActionType slotActionType) {
+								switch(clickType) {
+									case ClickType.MOUSE_LEFT -> rotate(bias);
+									case ClickType.MOUSE_RIGHT -> rotate(bias * -1);
+								}
+							}
+						}
+				);
+			}
+		}
+	}
+}

src/main/java/net/sys42/dakedres/grafting/blocks/Workbench.java

@@ -1,67 +0,0 @@
-package net.sys42.dakedres.grafting.blocks;
-
-import com.mojang.serialization.MapCodec;
-import eu.pb4.polymer.core.api.block.PolymerBlock;
-import eu.pb4.polymer.core.api.item.PolymerItem;
-import net.minecraft.block.Block;
-import net.minecraft.block.BlockState;
-import net.minecraft.block.BlockWithEntity;
-import net.minecraft.block.Blocks;
-import net.minecraft.block.entity.BlockEntity;
-import net.minecraft.entity.player.PlayerEntity;
-import net.minecraft.item.BlockItem;
-import net.minecraft.item.Item;
-import net.minecraft.item.ItemStack;
-import net.minecraft.item.Items;
-import net.minecraft.server.network.ServerPlayerEntity;
-import net.minecraft.util.ActionResult;
-import net.minecraft.util.collection.DefaultedList;
-import net.minecraft.util.hit.BlockHitResult;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.World;
-import net.sys42.dakedres.grafting.Grafting;
-import org.jetbrains.annotations.Nullable;
-
-public class Workbench extends BlockWithEntity implements PolymerBlock {
-	private final DefaultedList<ItemStack> stacks = DefaultedList.ofSize(9, ItemStack.EMPTY);
-
-	public Workbench(Settings settings) {
-		super(settings);
-	}
-
-	@Override
-	protected MapCodec<? extends BlockWithEntity> getCodec() {
-		return createCodec(Workbench::new);
-	}
-
-	@Override
-	public @Nullable BlockEntity createBlockEntity(BlockPos pos, BlockState state) {
-		return new WorkbenchBlockEntity(pos, state);
-	}
-
-	@Override
-	public BlockState getPolymerBlockState(BlockState blockState) {
-		return Blocks.CRAFTING_TABLE.getDefaultState();
-	}
-
-	@Override
-	protected ActionResult onUse(BlockState state, World world, BlockPos pos, PlayerEntity player, BlockHitResult hit) {
-		if(!player.isSneaking() && world.getBlockEntity(pos) instanceof WorkbenchBlockEntity blockEntity) {
-			blockEntity.openMenu((ServerPlayerEntity) player);
-			return ActionResult.SUCCESS;
-		}
-
-		return super.onUse(state, world, pos, player, hit);
-	}
-
-	public static final class WorkbenchItem extends BlockItem implements PolymerItem {
-		public WorkbenchItem(Block block, Settings settings) {
-			super(block, settings);
-		}
-
-		@Override
-		public Item getPolymerItem(ItemStack itemStack, @Nullable ServerPlayerEntity serverPlayerEntity) {
-			return Items.CRAFTING_TABLE;
-		}
-	}
-}

src/main/java/net/sys42/dakedres/grafting/blocks/WorkbenchBlockEntity.java

@@ -1,404 +0,0 @@
-package net.sys42.dakedres.grafting.blocks;
-
-import eu.pb4.polymer.resourcepack.api.PolymerModelData;
-import eu.pb4.sgui.api.ClickType;
-import eu.pb4.sgui.api.elements.GuiElement;
-import eu.pb4.sgui.api.elements.GuiElementInterface;
-import eu.pb4.sgui.api.gui.SimpleGui;
-import eu.pb4.sgui.virtual.inventory.VirtualSlot;
-import net.minecraft.block.BlockState;
-import net.minecraft.block.CrafterBlock;
-import net.minecraft.block.entity.LockableContainerBlockEntity;
-import net.minecraft.entity.player.PlayerEntity;
-import net.minecraft.entity.player.PlayerInventory;
-import net.minecraft.inventory.CraftingResultInventory;
-import net.minecraft.inventory.Inventories;
-import net.minecraft.inventory.Inventory;
-import net.minecraft.inventory.RecipeInputInventory;
-import net.minecraft.item.ItemStack;
-import net.minecraft.nbt.NbtCompound;
-import net.minecraft.recipe.RecipeMatcher;
-import net.minecraft.recipe.input.CraftingRecipeInput;
-import net.minecraft.registry.RegistryWrapper;
-import net.minecraft.screen.NamedScreenHandlerFactory;
-import net.minecraft.screen.ScreenHandler;
-import net.minecraft.screen.ScreenHandlerType;
-import net.minecraft.screen.slot.CraftingResultSlot;
-import net.minecraft.screen.slot.Slot;
-import net.minecraft.screen.slot.SlotActionType;
-import net.minecraft.server.network.ServerPlayerEntity;
-import net.minecraft.text.Text;
-import net.minecraft.util.collection.DefaultedList;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.World;
-import net.sys42.dakedres.grafting.Grafting;
-import net.sys42.dakedres.grafting.PlacementMatrixUtils;
-import net.sys42.dakedres.grafting.ui.Icons;
-import org.jetbrains.annotations.Nullable;
-
-import java.util.ArrayList;
-
-public class WorkbenchBlockEntity extends LockableContainerBlockEntity implements RecipeInputInventory {
-
-	public static final String NBT_GRID_ROTATION_KEY = "GridRotation";
-	public static final int GRID_SIZE = 9;
-	public static final int GRID_WIDTH = 3;
-
-	private DefaultedList<ItemStack> grid = DefaultedList.ofSize(GRID_SIZE, ItemStack.EMPTY);
-	private int gridRotation = 0;
-	private final ArrayList<Gui> guis = new ArrayList<>();
-	public WorkbenchBlockEntity(BlockPos blockPos, BlockState blockState) {
-		super(Grafting.WORKBENCH_BLOCK_ENTITY_TYPE, blockPos, blockState);
-	}
-
-	public void openMenu(ServerPlayerEntity playerEntity) {
-		playerEntity.openHandledScreen(new NamedScreenHandlerFactory() {
-			@Override
-			public Text getDisplayName() {
-				return WorkbenchBlockEntity.this.getDisplayName();
-			}
-
-			@Override
-			public @Nullable ScreenHandler createMenu(int syncId, PlayerInventory playerInventory, PlayerEntity player) {
-				return WorkbenchBlockEntity.this.createScreenHandler(syncId, playerInventory);
-			}
-		});
-	}
-
-	@Override
-	protected void readNbt(NbtCompound nbt, RegistryWrapper.WrapperLookup registryLookup) {
-		super.readNbt(nbt, registryLookup);
-		this.gridRotation = nbt.getByte(NBT_GRID_ROTATION_KEY);
-		this.grid = DefaultedList.ofSize(this.size(), ItemStack.EMPTY);
-	}
-
-	@Override
-	protected void writeNbt(NbtCompound nbt, RegistryWrapper.WrapperLookup registryLookup) {
-		super.writeNbt(nbt, registryLookup);
-		nbt.putByte(NBT_GRID_ROTATION_KEY, (byte) gridRotation);
-		Inventories.writeNbt(nbt, this.grid, registryLookup);
-	}
-
-	@Override
-	protected Text getContainerName() {
-		// TODO: localize
-		return Text.of("Workbench");
-	}
-
-	@Override
-	public int getWidth() {
-		return GRID_WIDTH;
-	}
-
-	@Override
-	public int getHeight() {
-		return GRID_WIDTH;
-	}
-
-	@Override
-	public DefaultedList<ItemStack> getHeldStacks() {
-		return this.grid;
-	}
-
-	@Override
-	protected void setHeldStacks(DefaultedList<ItemStack> inventory) {
-		this.grid = inventory;
-	}
-
-	@Override
-	protected ScreenHandler createScreenHandler(int syncId, PlayerInventory playerInventory) {
-		return createScreenHandler(syncId, playerInventory, playerInventory.player);
-	}
-
-	protected ScreenHandler createScreenHandler(int syncId, PlayerInventory playerInventory, PlayerEntity player) {
-		return new Gui((ServerPlayerEntity) player).openAsScreenHandler(syncId, playerInventory, player);
-	}
-
-	@Override
-	public int size() {
-		return GRID_SIZE;
-	}
-
-	public boolean hasEmptySlots() {
-		for(ItemStack itemStack : grid) {
-			if (itemStack.isEmpty()) {
-				return true;
-			}
-		}
-
-		return false;
-	}
-
-	private int[] getPlacementMatrix() {
-		return PlacementMatrixUtils.rotate(PlacementMatrixUtils.getPlacements(), gridRotation);
-	}
-
-	public void placeStack(ItemStack stack) {
-		int[] placements = getPlacementMatrix();
-
-		for(int i = 0; i < GRID_SIZE; i++) {
-			int p = placements[i];
-			if(getStack(p).isEmpty()) {
-				setStack(p, stack);
-				distributeStack(stack, 0);
-				return;
-			}
-		}
-	}
-
-	public void distributeStack(ItemStack stack) {
-		distributeStack(stack, stack.getCount());
-	}
-
-	public void distributeStack(ItemStack stack, int count) {
-		ArrayList<ItemStack> candidates = new ArrayList<>();
-		int totalCount = count;
-		int maxTotalCount = 0;
-		int[] placements = getPlacementMatrix();
-
-		for(int i = 0; i < GRID_SIZE; i++) {
-			int p = placements[i];
-			ItemStack ps = getStack(p);
-			if(!ps.isEmpty() && ItemStack.areItemsAndComponentsEqual(ps, stack)) {
-				totalCount += ps.getCount();
-				maxTotalCount += ps.getMaxCount();
-				ps.setCount(0);
-				candidates.add(ps);
-			}
-		}
-
-		int remainder = 0;
-		if(totalCount > maxTotalCount) {
-			remainder = totalCount - maxTotalCount;
-			totalCount = maxTotalCount;
-		}
-		int i = 0;
-		while(totalCount > 0) {
-			candidates.get(i % candidates.size()).increment(1);
-			totalCount--;
-			i++;
-		}
-
-		stack.decrement(count - remainder);
-		markDirty();
-	}
-
-	protected int lastPriorityIndexAlike(ItemStack stack) {
-		int[] placements = getPlacementMatrix();
-
-		for(int i = placements.length - 1; i >= 0; i--) {
-			int p = placements[i];
-			ItemStack ps = getStack(p);
-			if(ItemStack.areItemsAndComponentsEqual(ps, stack)) {
-				return p;
-			}
-		}
-
-		return -1;
-	}
-
-	public ItemStack removeStack(ItemStack stack, int amount) {
-		int index = lastPriorityIndexAlike(stack);
-
-		if(index >= 0) {
-			ItemStack o = removeStack(index, amount);
-			distributeStack(o, 0);
-			return o;
-		}
-
-		return ItemStack.EMPTY;
-	}
-
-	public boolean hasItemsLike(ItemStack stack) {
-		for(ItemStack itemStack : grid) {
-			if(ItemStack.areItemsAndComponentsEqual(itemStack, stack)) {
-				return true;
-			}
-		}
-
-		return false;
-	}
-
-//		Based on CrafterScreenHandler#updateResult
-	public ItemStack getResult(ServerPlayerEntity player) {
-		World world = player.getWorld();
-		CraftingRecipeInput craftingRecipeInput = createRecipeInput();
-		return CrafterBlock.getCraftingRecipe(world, craftingRecipeInput)
-				.map(recipe -> recipe.value()
-						.craft(craftingRecipeInput, world.getRegistryManager())
-				)
-				.orElse(ItemStack.EMPTY);
-	}
-
-	@Override
-	public void markDirty() {
-		for(Gui gui : guis) {
-			gui.updateResult();
-		}
-		super.markDirty();
-	}
-
-	@Override
-	public void provideRecipeInputs(RecipeMatcher finder) {
-
-	}
-
-	// TODO: Reimplement. Need to prevent any possible desync between the orientation as manipulated here, and the one in getPlacements
-	public void rotate(int direction) {
-		gridRotation = PlacementMatrixUtils.clampRotation(gridRotation + direction);
-		int[] rotationMatrix = PlacementMatrixUtils.ROTATION_MATRICES[PlacementMatrixUtils.clampRotation(direction)];
-		DefaultedList<ItemStack> newGrid = DefaultedList.ofSize(grid.size(), ItemStack.EMPTY);
-
-		for(int i = 0; i < grid.size(); i++) {
-			newGrid.set(rotationMatrix[i], grid.get(i));
-		}
-
-		setHeldStacks(newGrid);
-		markDirty();
-	}
-
-	public class Gui extends SimpleGui {
-		private static final int BUTTONS_LEFT = 1;
-		private static final int GRID_LEFT = BUTTONS_LEFT + 1;
-		private static final int RESULT_LEFT = GRID_LEFT + GRID_WIDTH + 2;
-
-		private final CraftingResultInventory resultInventory = new CraftingResultInventory();
-		public Gui(ServerPlayerEntity player) {
-			super(ScreenHandlerType.GENERIC_9X3, player, false);
-			guis.add(this);
-
-			this.setTitle(WorkbenchBlockEntity.this.getDisplayName());
-			setSlot(BUTTONS_LEFT, new RotateGridButton(Icons.ROTATE_CLOCKWISE,1));
-			setSlot(BUTTONS_LEFT + 9, new RotateGridButton(Icons.ROTATE_COUNTER_CLOCKWISE, -1));
-			setSlotRedirect(
-					RESULT_LEFT + 9,
-					new CraftingResultSlot(player, WorkbenchBlockEntity.this, resultInventory, 0, 0, 0)
-			);
-			for(int i = 0; i < GRID_SIZE; i++) {
-				int row = (i / GRID_WIDTH);
-				setSlotRedirect(
-						GRID_LEFT + (i % GRID_WIDTH) + (row * 9),
-						new GridSlot(i)
-				);
-			}
-
-			updateResult();
-		}
-
-		@Override
-		public void close() {
-			guis.remove(this);
-			super.close();
-		}
-
-		protected void updateResult() {
-			resultInventory.setStack(0, getResult(player));
-		}
-
-		/*
-		According to ScreenHandler#internalOnSlotClick, quickMove is continually called
-		while it returns a non-empty ItemStack that matches the original slot
-		 */
-		@Override
-		public ItemStack quickMove(int index) {
-			ItemStack returnStack = ItemStack.EMPTY;
-			Slot slot = this.getSlotRedirectOrPlayer(index);
-
-			if(slot != null && slot.hasStack() && !(slot instanceof VirtualSlot)) {
-				ItemStack operatingStack = slot.getStack();
-				returnStack = operatingStack.copy();
-
-				if(index < this.getVirtualSize()) {
-					int i = -1;
-
-					if(slot instanceof GridSlot) {
-						i = lastPriorityIndexAlike(operatingStack);
-						operatingStack = i == -1 ? ItemStack.EMPTY : removeStack(i);
-
-						if (!this.insertItem(operatingStack, this.getVirtualSize(), this.getVirtualSize() + 36, true)) {
-							return ItemStack.EMPTY;
-						}
-					}
-
-					if (!this.insertItem(operatingStack, this.getVirtualSize(), this.getVirtualSize() + 36, true)) {
-						return ItemStack.EMPTY;
-					}
-
-					if(slot.getIndex() == i) {
-						return ItemStack.EMPTY;
-					}
-				} else {
-					if(hasItemsLike(operatingStack)) {
-						distributeStack(operatingStack);
-						return ItemStack.EMPTY;
-					} else if(hasEmptySlots()) {
-						placeStack(operatingStack);
-						slot.setStack(ItemStack.EMPTY);
-					} else {
-						return ItemStack.EMPTY;
-					}
-				}
-
-				if (operatingStack.isEmpty()) {
-					slot.setStack(ItemStack.EMPTY);
-				} else {
-					slot.markDirty();
-				}
-			} else if (slot instanceof VirtualSlot) {
-				return slot.getStack();
-			}
-
-			return returnStack;
-		}
-
-		//		- Inserting single items changes the shape
-		//		- Inserting a full stack will attempt to distribute the stack, or insert if that stack isn't in the workbench
-		public class GridSlot extends Slot {
-			public GridSlot(int index) {
-				super(WorkbenchBlockEntity.this, index, index, 0);
-			}
-
-			@Override
-			public ItemStack insertStack(ItemStack stack, int count) {
-
-				if(stack.isEmpty()) {
-					return stack;
-				}
-
-				int allowedCount = Math.min(count, stack.getCount());
-				if(
-						(!hasItemsLike(stack) || count == 1) &&
-								WorkbenchBlockEntity.this.hasEmptySlots()
-				) {
-					placeStack(stack.split(allowedCount));
-				} else {
-					distributeStack(stack, allowedCount);
-				}
-
-				return stack;
-			}
-
-			@Override
-			public ItemStack takeStack(int amount) {
-				return removeStack(this.getStack(), amount);
-			}
-		}
-
-		public class RotateGridButton extends GuiElement {
-			public RotateGridButton(PolymerModelData model, int bias) {
-				super(
-						Icons.getStack(model),
-						new GuiElementInterface.ItemClickCallback() {
-							@Override
-							public void click(int i, ClickType clickType, SlotActionType slotActionType) {
-								switch(clickType) {
-									case ClickType.MOUSE_LEFT -> rotate(bias);
-									case ClickType.MOUSE_RIGHT -> rotate(bias * -1);
-								}
-							}
-						}
-				);
-			}
-		}
-	}
-}

src/main/java/net/sys42/dakedres/grafting/data/PlacementOrder.java

@@ -0,0 +1,66 @@
+package net.sys42.dakedres.grafting.data;
+
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.DataResult;
+import com.mojang.serialization.DynamicOps;
+import com.mojang.serialization.codecs.PrimitiveCodec;
+import net.minecraft.util.Identifier;
+import net.sys42.dakedres.grafting.Grafting;
+
+import java.util.stream.IntStream;
+
+public class PlacementOrder {
+	public static final PlacementOrder DEFAULT_FALLBACK = new PlacementOrder(new int[]{
+			0,1,2,
+			3,4,5,
+			6,7,8
+	});
+	public static final Identifier DEFAULT_ID = Identifier.of(Grafting.MOD_ID, "default");
+
+	int[] orderMatrix;
+	public PlacementOrder(int[] orderMatrix) {
+		this.orderMatrix = orderMatrix;
+	}
+
+	public int[] getOrderMatrix() {
+		return orderMatrix;
+	}
+
+	public static final Codec<PlacementOrder> CODEC = new PrimitiveCodec<>() {
+		@Override
+		public <T> DataResult<PlacementOrder> read(DynamicOps<T> ops, T input) {
+			return ops.getIntStream(input).flatMap(intStream -> {
+				var om = intStream.toArray();
+				try {
+					PlacementOrder.validate(om);
+				} catch (Exception e) {
+					return DataResult.error(e::getMessage);
+				}
+
+				return DataResult.success(new PlacementOrder(om));
+			});
+		}
+
+		@Override
+		public <T> T write(DynamicOps<T> ops, PlacementOrder value) {
+			return ops.createIntList(IntStream.of(value.getOrderMatrix()));
+		}
+
+		@Override
+		public String toString() {
+			return "PlacementOrder";
+		}
+	};
+
+	public static void validate(int[] orderMatrix) throws Exception {
+		if(orderMatrix.length != 9) {
+			throw new Exception("Not a complete matrix. Expected an array of at least 9 integers between 0 and 8.");
+		}
+
+		for(int i = 0; i < 9; i++) {
+			if(orderMatrix[i] >= 9 || orderMatrix[i] < 0) {
+				throw new Exception(String.format("At index {}, expected integer between 8 and 0", i));
+			}
+		}
+	}
+}

src/main/java/net/sys42/dakedres/grafting/data/PlacementOrderReloadListener.java

@@ -0,0 +1,62 @@
+package net.sys42.dakedres.grafting.data;
+
+import com.google.gson.*;
+import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
+import net.minecraft.registry.Registry;
+import net.minecraft.resource.Resource;
+import net.minecraft.util.Identifier;
+import net.sys42.dakedres.grafting.Grafting;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.util.Map;
+
+public class PlacementOrderReloadListener {
+	static public void init() {
+		ServerLifecycleEvents.START_DATA_PACK_RELOAD.register((server, resourceManager) -> {
+			// Thank you tomalbrc! https://github.com/tomalbrc/filament/blob/main/src/main/java/de/tomalbrc/filament/util/FilamentSynchronousResourceReloadListener.java#L70
+
+			var resources = resourceManager.findResources(
+					"grafting/placement_order",
+					path -> path.getPath().endsWith(".json")
+			);
+
+			for(Map.Entry<Identifier, Resource> entry : resources.entrySet()) {
+				load(entry.getKey(), entry.getValue());
+			}
+
+//			Grafting.LOGGER.info("Loaded {} placement orders.", Grafting.PLACEMENT_ORDER_REGISTRY.getEntrySet().size());
+		});
+	}
+
+	static private void load(Identifier id, Resource resource) {
+		JsonObject json;
+
+		try(BufferedReader reader = resource.getReader()) {
+			load(id, reader);
+		} catch(IOException | IllegalStateException e) {
+			error(id, e);
+			return;
+		}
+	}
+
+	static private void load(Identifier id, BufferedReader reader) {
+		Gson gson = new GsonBuilder().create();
+		JsonElement rootElement = JsonParser.parseReader(reader);
+
+		try {
+			int[] orderMatrix = gson.fromJson(rootElement, int[].class);
+
+			PlacementOrder.validate(orderMatrix);
+		} catch(Exception e) {
+			error(id, e);
+		}
+
+//		Grafting.PLACEMENT_ORDER_REGISTRY
+//		PlacementOrder.Data = gson.fromJson(rootElement, PlacementOrder.Data.class);
+	}
+
+	static private void error(Identifier id, Exception e) {
+		Grafting.LOGGER.error("Could not load placement order \"{}\": {}", id, e);
+	}
+}

src/main/java/net/sys42/dakedres/grafting/item/WorkbenchItem.java

@@ -1,36 +1,56 @@
 package net.sys42.dakedres.grafting.item;
 
 import eu.pb4.polymer.core.api.item.PolymerItem;
+import eu.pb4.polymer.resourcepack.api.PolymerModelData;
+import eu.pb4.polymer.resourcepack.api.PolymerResourcePackUtils;
 import net.minecraft.block.Block;
 import net.minecraft.item.*;
+import net.minecraft.network.packet.s2c.play.PlaySoundS2CPacket;
+import net.minecraft.registry.Registries;
 import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.sound.SoundCategory;
+import net.minecraft.util.ActionResult;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.math.Vec3d;
+import net.sys42.dakedres.grafting.Grafting;
 import org.jetbrains.annotations.Nullable;
 
 public class WorkbenchItem extends BlockItem implements PolymerItem {
-	public WorkbenchItem(Block block, Settings settings, String modelId) {
+	public final PolymerModelData model = PolymerResourcePackUtils.requestModel(
+			Items.BREEZE_ROD,
+			Identifier.of(Grafting.MOD_ID, "item/workbench")
+	);
+	public WorkbenchItem(Block block, Settings settings) {
 		super(block, settings);
 	}
 
 	@Override
 	public Item getPolymerItem(ItemStack itemStack, @Nullable ServerPlayerEntity serverPlayerEntity) {
-		return Items.CRAFTING_TABLE;
+		return model.item();
+	}
+
+	@Override
+	public int getPolymerCustomModelData(ItemStack itemStack, @Nullable ServerPlayerEntity player) {
+		return model.value();
 	}
 
 	// Thank you Mykhailo!
 	// copied from:
 	// https://github.com/MykhailoOpryshok/Borukva-Food/blob/master/src/main/java/com/opryshok/block/TexturedPolyBlockItem.java#L18
-//    @Override
+    @Override
-//    public ActionResult useOnBlock(ItemUsageContext context) {
+    public ActionResult useOnBlock(ItemUsageContext context) {
-//        var x = super.useOnBlock(context);
+        var x = super.useOnBlock(context);
-//        if (x == ActionResult.CONSUME) {
+        if (x == ActionResult.CONSUME) {
-//            if (context.getPlayer() instanceof ServerPlayerEntity player) {
+            if (context.getPlayer() instanceof ServerPlayerEntity player) {
-//                var pos = Vec3d.ofCenter(context.getBlockPos().offset(context.getSide()));
+                var pos = Vec3d.ofCenter(context.getBlockPos().offset(context.getSide()));
-//                var blockSoundGroup = this.getBlock().getDefaultState().getSoundGroup();
+                var blockSoundGroup = this.getBlock().getDefaultState().getSoundGroup();
-//                player.networkHandler.sendPacket(new PlaySoundS2CPacket(Registries.SOUND_EVENT.getEntry(this.getPlaceSound(this.getBlock().getDefaultState())), SoundCategory.BLOCKS, pos.x, pos.y, pos.z, (blockSoundGroup.getVolume() + 1.0F) / 2.0F, blockSoundGroup.getPitch() * 0.8F, context.getPlayer().getRandom().nextLong()));
+                player.networkHandler.sendPacket(
-//            }
+						new PlaySoundS2CPacket(Registries.SOUND_EVENT.getEntry(this.getPlaceSound(this.getBlock().getDefaultState())), SoundCategory.BLOCKS, pos.x, pos.y, pos.z, (blockSoundGroup.getVolume() + 1.0F) / 2.0F, blockSoundGroup.getPitch() * 0.8F, context.getPlayer().getRandom().nextLong())
-//            return ActionResult.SUCCESS;
+				);
-//        }
+            }
-//        return x;
+            return ActionResult.SUCCESS;
-//    }
+        }
+        return x;
+    }
 
 }

src/main/java/net/sys42/dakedres/grafting/ui/Icons.java

@@ -14,17 +14,24 @@ import net.sys42.dakedres.grafting.Grafting;
 public class Icons {
 	public static final Item BASE_ITEM = Items.BREEZE_ROD;
 
-	public static final PolymerModelData ROTATE_CLOCKWISE = uiElementModel("icons/rotate_clockwise.png");
+	public static final PolymerModelData ROTATE_CLOCKWISE = uiElementModel("rotate_clockwise");
-	public static final PolymerModelData ROTATE_COUNTER_CLOCKWISE = uiElementModel("icons/rotate_counter_clockwise.png");
+	public static final PolymerModelData ROTATE_COUNTER_CLOCKWISE = uiElementModel("rotate_counter_clockwise");
 
-	private static PolymerModelData uiElementModel(String path) {
+	private static PolymerModelData uiElementModel(String name) {
-		return PolymerResourcePackUtils.requestModel(BASE_ITEM, Identifier.of(Grafting.MOD_ID + path));
+		return PolymerResourcePackUtils.requestModel(
+				BASE_ITEM,
+				Identifier.of(Grafting.MOD_ID, "icon/" + name)
+		);
 	}
 
 	public static ItemStack getStack(PolymerModelData model) {
-		ItemStack stack = Icons.ROTATE_CLOCKWISE.asStack();
+		ItemStack stack = model.asStack();
 		stack.set(DataComponentTypes.HIDE_TOOLTIP, Unit.INSTANCE);
 
 		return stack;
 	}
+
+	public static void init() {
+
+	}
 }

src/main/resources/assets/grafting/font/workbench_gui.json

@@ -0,0 +1,29 @@
+{
+  "providers": [
+    {
+      "type": "space",
+      "advances": {
+        ".": -134,
+        "-": -8
+      }
+    },
+    {
+      "type": "bitmap",
+      "file": "grafting:gui/workbench_gui.png",
+      "ascent": 34,
+      "height": 256,
+      "chars": [
+        "0"
+      ]
+    },
+    {
+          "type": "bitmap",
+          "file": "grafting:gui/workbench_gui_with_inventory.png",
+          "ascent": 34,
+          "height": 256,
+          "chars": [
+            "1"
+          ]
+        }
+  ]
+}

src/main/resources/assets/grafting/lang/en_us.json

@@ -0,0 +1,3 @@
+{
+	"block.grafting.workbench": "Workbench"
+}

src/main/resources/assets/grafting/models/icon/rotate_clockwise.json

@@ -0,0 +1,6 @@
+{
+	"parent": "grafting:icon/shifted",
+	"textures": {
+		"layer0": "grafting:item/icon/rotate_clockwise"
+	}
+}

src/main/resources/assets/grafting/models/icon/rotate_counter_clockwise.json

@@ -0,0 +1,6 @@
+{
+	"parent": "grafting:icon/shifted",
+	"textures": {
+		"layer0": "grafting:item/icon/rotate_counter_clockwise"
+	}
+}

src/main/resources/assets/grafting/models/icon/shifted.json

@@ -0,0 +1,10 @@
+{
+  "parent": "minecraft:item/generated",
+  "display": {
+    "gui": {
+      "rotation": [ 0, 0, 0 ],
+      "translation": [ -1, 0, 0 ],
+      "scale": [ 1, 1, 1 ]
+    }
+  }
+}

src/main/resources/assets/grafting/models/item/workbench.json

@@ -0,0 +1,3 @@
+{
+	"parent": "grafting:block/workbench"
+}

src/main/resources/data/grafting/grafting/placement_order/default.json

@@ -0,0 +1,5 @@
+[
+	0,1,2,
+	3,4,5,
+	6,7,8
+]