Implement Simple Cross Loader Inventory System

Common/src/main/java/me/hypherionmc/craterlib/systems/SimpleInventory.java

@@ -0,0 +1,77 @@
+package me.hypherionmc.craterlib.systems;
+
+import com.google.common.base.Preconditions;
+import net.minecraft.core.NonNullList;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.world.Clearable;
+import net.minecraft.world.Container;
+import net.minecraft.world.ContainerHelper;
+import net.minecraft.world.SimpleContainer;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+
+/**
+ * @author HypherionSA
+ * @date 24/09/2022
+ */
+public class SimpleInventory implements Clearable {
+
+    private final SimpleContainer itemHandler;
+    private final int size;
+
+    private final int stackSize;
+
+    public SimpleInventory(int size, int maxStackSize) {
+        itemHandler = new SimpleContainer(size) {
+            @Override
+            public int getMaxStackSize() {
+                return maxStackSize;
+            }
+        };
+        this.size = size;
+        this.stackSize = maxStackSize;
+    }
+
+    private static void copyToInv(NonNullList<ItemStack> src, Container dest) {
+        Preconditions.checkArgument(src.size() == dest.getContainerSize());
+        for (int i = 0; i < src.size(); i++) {
+            dest.setItem(i, src.get(i));
+        }
+    }
+
+    private static NonNullList<ItemStack> copyFromInv(Container inv) {
+        NonNullList<ItemStack> ret = NonNullList.withSize(inv.getContainerSize(), ItemStack.EMPTY);
+        for (int i = 0; i < inv.getContainerSize(); i++) {
+            ret.set(i, inv.getItem(i));
+        }
+        return ret;
+    }
+
+    public void readNBT(CompoundTag tag) {
+        NonNullList<ItemStack> tmp = NonNullList.withSize(size, ItemStack.EMPTY);
+        ContainerHelper.loadAllItems(tag, tmp);
+        copyToInv(tmp, itemHandler);
+    }
+
+    public void writeNBT(CompoundTag tag) {
+        ContainerHelper.saveAllItems(tag, copyFromInv(itemHandler));
+    }
+
+    public final int inventorySize() {
+        return getItemHandler().getContainerSize();
+    }
+
+    public int getStackSize() {
+        return stackSize;
+    }
+
+    @Override
+    public void clearContent() {
+        getItemHandler().clearContent();
+    }
+
+    public final Container getItemHandler() {
+        return itemHandler;
+    }
+
+}

Forge/src/main/java/me/hypherionmc/craterlib/systems/inventory/ForgeInventoryWrapper.java

@@ -0,0 +1,91 @@
+package me.hypherionmc.craterlib.systems.inventory;
+
+import com.google.common.base.Suppliers;
+import me.hypherionmc.craterlib.systems.SimpleInventory;
+import net.minecraft.core.Direction;
+import net.minecraft.world.WorldlyContainer;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.ItemStack;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.function.Supplier;
+import java.util.stream.IntStream;
+
+/**
+ * @author HypherionSA
+ * @date 24/09/2022
+ */
+public class ForgeInventoryWrapper implements WorldlyContainer {
+
+    private final SimpleInventory inventory;
+    private final Supplier<int[]> slots = Suppliers.memoize(() -> IntStream.range(0, getContainerSize()).toArray());
+
+    public ForgeInventoryWrapper(SimpleInventory inventory) {
+        this.inventory = inventory;
+    }
+
+    @Override
+    public int[] getSlotsForFace(Direction side) {
+        return slots.get();
+    }
+
+    @Override
+    public boolean canPlaceItemThroughFace(int slot, ItemStack stack, @Nullable Direction side) {
+        if (canPlaceItem(slot, stack)) {
+            ItemStack existing = getItem(slot);
+            return existing.getCount() < getMaxStackSize();
+        }
+
+        return false;
+    }
+
+    @Override
+    public boolean canTakeItemThroughFace(int slot, ItemStack stack, Direction side) {
+        return true;
+    }
+
+    @Override
+    public int getContainerSize() {
+        return inventory.getItemHandler().getContainerSize();
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return inventory.getItemHandler().isEmpty();
+    }
+
+    @Override
+    public ItemStack getItem(int slot) {
+        return inventory.getItemHandler().getItem(slot);
+    }
+
+    @Override
+    public ItemStack removeItem(int p_18942_, int p_18943_) {
+        return inventory.getItemHandler().removeItem(p_18942_, p_18943_);
+    }
+
+    @Override
+    public ItemStack removeItemNoUpdate(int slot) {
+        return inventory.getItemHandler().removeItemNoUpdate(slot);
+    }
+
+    @Override
+    public void setItem(int slot, ItemStack stack) {
+        inventory.getItemHandler().setItem(slot, stack);
+    }
+
+    @Override
+    public void setChanged() {
+        inventory.getItemHandler().setChanged();
+    }
+
+    @Override
+    public boolean stillValid(Player player) {
+        return inventory.getItemHandler().stillValid(player);
+    }
+
+    @Override
+    public void clearContent() {
+        inventory.getItemHandler().clearContent();
+    }
+}