Fix hoppers not working correctly with water purifiers on Forge

forge/src/main/java/toughasnails/forge/mixin/MixinWaterPurifierBlockEntity.java

@@ -0,0 +1,69 @@
+/*******************************************************************************
+ * Copyright 2023, the Glitchfiend Team.
+ * All rights reserved.
+ ******************************************************************************/
+package toughasnails.forge.mixin;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.world.WorldlyContainer;
+import net.minecraft.world.level.block.entity.BaseContainerBlockEntity;
+import net.minecraft.world.level.block.entity.BlockEntityType;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraftforge.common.capabilities.Capability;
+import net.minecraftforge.common.capabilities.ForgeCapabilities;
+import net.minecraftforge.common.util.LazyOptional;
+import net.minecraftforge.items.IItemHandler;
+import net.minecraftforge.items.wrapper.SidedInvWrapper;
+import org.jetbrains.annotations.Nullable;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import toughasnails.block.entity.WaterPurifierBlockEntity;
+
+@Mixin(value = WaterPurifierBlockEntity.class, remap = false)
+public abstract class MixinWaterPurifierBlockEntity extends BaseContainerBlockEntity implements WorldlyContainer {
+    protected MixinWaterPurifierBlockEntity(BlockEntityType<?> p_155076_, BlockPos p_155077_, BlockState p_155078_) {
+        super(p_155076_, p_155077_, p_155078_);
+    }
+
+    @Unique
+    LazyOptional<? extends IItemHandler>[] handlers;
+
+    @Inject(method="<init>", at=@At("RETURN"))
+    public void onConstructed(BlockPos pos, BlockState state, CallbackInfo ci)
+    {
+        this.handlers = SidedInvWrapper.create(this, Direction.UP, Direction.DOWN, Direction.NORTH, Direction.EAST, Direction.SOUTH, Direction.WEST);
+    }
+
+    @Override
+    public <T> LazyOptional<T> getCapability(Capability<T> capability, @Nullable Direction facing)
+    {
+        if (!this.remove && facing != null && capability == ForgeCapabilities.ITEM_HANDLER) {
+            if (facing == Direction.UP)
+                return handlers[0].cast();
+            else if (facing == Direction.DOWN)
+                return handlers[1].cast();
+            else
+                return handlers[2].cast();
+        }
+        return super.getCapability(capability, facing);
+    }
+
+    @Override
+    public void invalidateCaps()
+    {
+        super.invalidateCaps();
+        for (int x = 0; x < handlers.length; x++)
+            handlers[x].invalidate();
+    }
+
+    @Override
+    public void reviveCaps()
+    {
+        super.reviveCaps();
+        this.handlers = SidedInvWrapper.create(this, Direction.UP, Direction.DOWN, Direction.NORTH, Direction.EAST, Direction.SOUTH, Direction.WEST);
+    }
+}

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

@@ -4,7 +4,8 @@
   "compatibilityLevel": "JAVA_17",
   "refmap": "toughasnails.refmap.json",
   "mixins": [
-    "MixinTemperatureHelperImpl"
+    "MixinTemperatureHelperImpl",
+    "MixinWaterPurifierBlockEntity"
   ],
   "client": [
     "client.MixinGui"