mailbox menu showing

src/main/java/com/danitheskunk/skunkstuff/Blocks/BlockEntityMailbox.java

@@ -33,7 +33,7 @@ public class BlockEntityMailbox extends BaseContainerBlockEntity {
 	@Override
 	protected AbstractContainerMenu createMenu(int syncId,
 		Inventory playerInventory) {
-		return null;
+		return new MenuMailbox(syncId, playerInventory, this);
 	}
 
 	@Override

src/main/java/com/danitheskunk/skunkstuff/Blocks/BlockMailbox.java

@@ -1,12 +1,19 @@
 package com.danitheskunk.skunkstuff.Blocks;
 
 import net.minecraft.core.BlockPos;
+import net.minecraft.stats.Stats;
+import net.minecraft.world.InteractionHand;
+import net.minecraft.world.InteractionResult;
+import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.context.BlockPlaceContext;
 import net.minecraft.world.level.BlockGetter;
+import net.minecraft.world.level.Level;
 import net.minecraft.world.level.block.*;
 import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.entity.HopperBlockEntity;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.level.block.state.StateDefinition;
+import net.minecraft.world.phys.BlockHitResult;
 import net.minecraft.world.phys.shapes.CollisionContext;
 import net.minecraft.world.phys.shapes.VoxelShape;
 import org.jetbrains.annotations.Nullable;
@@ -71,4 +78,17 @@ public class BlockMailbox extends BaseEntityBlock {
 	public RenderShape getRenderShape(BlockState state) {
 		return RenderShape.MODEL;
 	}
+
+	public InteractionResult use(BlockState state, Level world, BlockPos pos, Player player, InteractionHand hand, BlockHitResult hit) {
+		if (world.isClientSide) {
+			return InteractionResult.SUCCESS;
+		} else {
+			BlockEntity blockEntity = world.getBlockEntity(pos);
+			if (blockEntity instanceof BlockEntityMailbox) {
+				player.openMenu((BlockEntityMailbox)blockEntity);
+			}
+
+			return InteractionResult.CONSUME;
+		}
+	}
 }

src/main/java/com/danitheskunk/skunkstuff/Blocks/MenuMailbox.java

@@ -0,0 +1,77 @@
+package com.danitheskunk.skunkstuff.Blocks;
+
+import net.minecraft.client.gui.screens.inventory.HopperScreen;
+import net.minecraft.world.Container;
+import net.minecraft.world.SimpleContainer;
+import net.minecraft.world.entity.player.Inventory;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.inventory.*;
+import net.minecraft.world.item.ItemStack;
+import org.jetbrains.annotations.Nullable;
+
+public class MenuMailbox extends AbstractContainerMenu {
+
+	private static final int CONTAINER_SIZE = 9;
+	private final Container mailbox;
+	public MenuMailbox(int syncId, Inventory playerInventory) {
+		this(syncId, playerInventory, new SimpleContainer(CONTAINER_SIZE));
+	}
+	public MenuMailbox(int syncId, Inventory playerInventory, Container inventory) {
+		super(Menus.MAILBOX, syncId);
+		this.mailbox = inventory;
+		checkContainerSize(inventory, CONTAINER_SIZE);
+		inventory.startOpen(playerInventory.player);
+
+		int i;
+		for(i = 0; i < 3; ++i) {
+			for(int j = 0; j < 3; ++j) {
+				this.addSlot(new Slot(inventory, i + j * 3, 62 + i * 18,
+					18 + j * 18));
+			}
+		}
+
+		for(i = 0; i < 3; ++i) {
+			for(int j = 0; j < 9; ++j) {
+				this.addSlot(new Slot(playerInventory, j + i * 9 + 9,
+					8 + j * 18, i * 18 + 84));
+			}
+		}
+
+		for(i = 0; i < 9; ++i) {
+			this.addSlot(new Slot(playerInventory, i, 8 + i * 18, 142));
+		}
+
+	}
+
+	@Override
+	public ItemStack quickMoveStack(Player player, int fromIndex) {
+		ItemStack itemStack = ItemStack.EMPTY;
+		Slot slot = (Slot)this.slots.get(fromIndex);
+		if (slot != null && slot.hasItem()) {
+			ItemStack itemStack2 = slot.getItem();
+			itemStack = itemStack2.copy();
+			if (fromIndex < this.mailbox.getContainerSize()) {
+				if (!this.moveItemStackTo(itemStack2,
+					this.mailbox.getContainerSize(), this.slots.size(), true)) {
+					return ItemStack.EMPTY;
+				}
+			} else if (!this.moveItemStackTo(itemStack2, 0,
+				this.mailbox.getContainerSize(), false)) {
+				return ItemStack.EMPTY;
+			}
+
+			if (itemStack2.isEmpty()) {
+				slot.set(ItemStack.EMPTY);
+			} else {
+				slot.setChanged();
+			}
+		}
+
+		return itemStack;
+	}
+
+	@Override
+	public boolean stillValid(Player player) {
+		return mailbox.stillValid(player);
+	}
+}

src/main/java/com/danitheskunk/skunkstuff/Blocks/Menus.java

@@ -0,0 +1,20 @@
+package com.danitheskunk.skunkstuff.Blocks;
+
+import net.minecraft.core.Registry;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.inventory.AbstractContainerMenu;
+import net.minecraft.world.inventory.MenuType;
+
+public class Menus {
+	public static final MenuType<MenuMailbox> MAILBOX = register("mailbox",
+		MenuMailbox::new);
+
+	private static <T extends AbstractContainerMenu> MenuType<T> register(String id, MenuType.MenuSupplier<T> factory) {
+		return Registry.register(Registry.MENU,
+			new ResourceLocation(Blocks.namespace, id),
+			new MenuType(factory));
+	}
+	public static void init() {
+
+	}
+}

src/main/java/com/danitheskunk/skunkstuff/Blocks/ScreenMailbox.java

@@ -0,0 +1,21 @@
+package com.danitheskunk.skunkstuff.Blocks;
+
+import com.mojang.blaze3d.vertex.PoseStack;
+import net.fabricmc.api.EnvType;
+import net.fabricmc.api.Environment;
+import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
+import net.minecraft.network.chat.Component;
+import net.minecraft.world.entity.player.Inventory;
+
+@Environment(EnvType.CLIENT)
+public class ScreenMailbox extends AbstractContainerScreen<MenuMailbox> {
+	public ScreenMailbox(MenuMailbox handler, Inventory inventory, Component title) {
+		super(handler, inventory, title);
+	}
+
+	@Override
+	protected void renderBg(PoseStack matrices, float delta, int mouseX,
+		int mouseY) {
+
+	}
+}

src/main/java/com/danitheskunk/skunkstuff/Client.java

@@ -0,0 +1,15 @@
+package com.danitheskunk.skunkstuff;
+
+import com.danitheskunk.skunkstuff.Blocks.Menus;
+import com.danitheskunk.skunkstuff.Blocks.ScreenMailbox;
+import net.fabricmc.fabric.api.client.screenhandler.v1.ScreenRegistry;
+import net.minecraft.client.gui.screens.MenuScreens;
+import org.quiltmc.loader.api.ModContainer;
+import org.quiltmc.qsl.base.api.entrypoint.client.ClientModInitializer;
+
+public class Client implements ClientModInitializer {
+	@Override
+	public void onInitializeClient(ModContainer mod) {
+		MenuScreens.register(Menus.MAILBOX, ScreenMailbox::new);
+	}
+}

src/main/java/com/danitheskunk/skunkstuff/SkunkStuff.java

@@ -3,6 +3,7 @@ package com.danitheskunk.skunkstuff;
 import com.danitheskunk.skunkstuff.Blocks.BlockGoban;
 import com.danitheskunk.skunkstuff.Blocks.BlockMailbox;
 import com.danitheskunk.skunkstuff.Blocks.Blocks;
+import com.danitheskunk.skunkstuff.Blocks.Menus;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.DispenserBlock;
 import org.quiltmc.loader.api.ModContainer;
@@ -36,6 +37,7 @@ public class SkunkStuff implements ModInitializer {
 
 	@Override
 	public void onInitialize(ModContainer mod) {
+		Menus.init();
 		Blocks.registerAll();
 	}
 }

src/main/resources/quilt.mod.json

@@ -19,7 +19,8 @@
     },
     "intermediate_mappings": "net.fabricmc:intermediary",
     "entrypoints": {
-      "init": "com.danitheskunk.skunkstuff.SkunkStuff"
+      "init": "com.danitheskunk.skunkstuff.SkunkStuff",
+      "client_init": "com.danitheskunk.skunkstuff.Client"
     },
     "depends": [
       {