Fix #36

forge/src/main/java/dev/ithundxr/createnumismatics/forge/mixin/self/VendorBlockEntityCapabilities.java

@@ -0,0 +1,52 @@
+package dev.ithundxr.createnumismatics.forge.mixin.self;
+
+import com.simibubi.create.foundation.blockEntity.SmartBlockEntity;
+import dev.ithundxr.createnumismatics.content.vendor.VendorBlockEntity;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.world.WorldlyContainer;
+import net.minecraft.world.level.block.entity.BlockEntityType;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraftforge.common.capabilities.*;
+import net.minecraftforge.common.util.LazyOptional;
+import net.minecraftforge.items.IItemHandler;
+import net.minecraftforge.items.wrapper.SidedInvWrapper;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+
+@Mixin(VendorBlockEntity.class)
+public abstract class VendorBlockEntityCapabilities extends SmartBlockEntity implements ICapabilityProvider {
+    public VendorBlockEntityCapabilities(BlockEntityType<?> type, BlockPos pos, BlockState state) {
+        super(type, pos, state);
+    }
+
+    // This is actually just down + all the 5 other sides
+    @Unique private static final Direction[] numismatics$DIRECTIONS = {Direction.DOWN, Direction.NORTH};
+    @Unique LazyOptional<? extends IItemHandler>[] numismatics$handlers = SidedInvWrapper.create((WorldlyContainer) this, numismatics$DIRECTIONS);
+
+    @Override
+    public <T> @NotNull LazyOptional<T> getCapability(@NotNull Capability<T> capability, @Nullable Direction facing) {
+        if (capability == ForgeCapabilities.ITEM_HANDLER && facing != null && !remove) {
+            // If down return the down handler otherwise return the one for all other sides
+            return facing == Direction.DOWN ? numismatics$handlers[0].cast() : numismatics$handlers[1].cast();
+        }
+        return super.getCapability(capability, facing);
+    }
+
+    @Override
+    public void reviveCaps() {
+        super.reviveCaps();
+        numismatics$handlers = SidedInvWrapper.create((WorldlyContainer) this, numismatics$DIRECTIONS);
+    }
+
+    @Override
+    public void invalidateCaps() {
+        super.invalidateCaps();
+
+        for (LazyOptional<? extends IItemHandler> createNumismatics$handler : numismatics$handlers) {
+            createNumismatics$handler.invalidate();
+        }
+    }
+}

forge/src/main/resources/numismatics.mixins.json

@@ -9,7 +9,8 @@
     "client.MixinPonderTooltipHandler"
   ],
   "mixins": [
-    "ServerGamePacketListenerImplMixin"
+    "ServerGamePacketListenerImplMixin",
+    "self.VendorBlockEntityCapabilities"
   ],
   "injectors": {
     "defaultRequire": 1