hopper counters

src/main/java/carpet/mixins/HopperBlockEntityMixin.java

@@ -0,0 +1,60 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import net.minecraft.block.HopperBlock;
+import net.minecraft.block.entity.BlockEntityType;
+import net.minecraft.block.entity.HopperBlockEntity;
+import net.minecraft.block.entity.LootableContainerBlockEntity;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.DyeColor;
+import net.minecraft.util.math.BlockPos;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+import carpet.helpers.HopperCounter;
+import carpet.utils.WoolTool;
+
+@Mixin(HopperBlockEntity.class)
+public abstract class HopperBlockEntityMixin extends LootableContainerBlockEntity {
+
+    protected HopperBlockEntityMixin(BlockEntityType<?> blockEntityType_1) {
+        super(blockEntityType_1);
+    }
+
+    @Shadow
+    public abstract double getHopperX();
+
+    @Shadow
+    public abstract double getHopperY();
+
+    @Shadow
+    public abstract double getHopperZ();
+
+    @Shadow
+    public abstract void setInvStack(int int_1, ItemStack itemStack_1);
+
+    @Shadow
+    public abstract int getInvSize();
+
+    @Inject(method = "insert", at = @At("HEAD"), cancellable = true)
+    private void onInsert(CallbackInfoReturnable<Boolean> cir)
+    {
+        if (CarpetSettings.b_hopperCounters) {
+            DyeColor wool_color = WoolTool.getWoolColorAtPosition(
+                    getWorld(),
+                    new BlockPos(getHopperX(), getHopperY(), getHopperZ()).offset(this.getCachedState().get(HopperBlock.FACING)));
+            if (wool_color != null) {
+                for (int i = 0; i < this.getInvSize(); ++i) {
+                    if (!this.getInvStack(i).isEmpty()) {
+                        ItemStack itemstack = this.getInvStack(i);//.copy();
+                        HopperCounter.COUNTERS.get(wool_color).add(this.getWorld().getServer(), itemstack);
+                        this.setInvStack(i, ItemStack.EMPTY);
+                    }
+                }
+                cir.setReturnValue(true);
+            }
+        }
+    }
+}

src/main/resources/carpet.mixins.json

@@ -10,7 +10,8 @@
     "ExperienceOrbEntityMixin",
     "PlayerActionC2SPacketMixin",
     "ServerPlayerEntityMixin",
-    "ServerChunkManagerMixin"
+    "ServerChunkManagerMixin",
+    "HopperBlockEntityMixin"
   ],
   "client": [
     "MinecraftClientMixin",