movableAmethyst extension

src/main/java/carpet/mixins/BuddingAmethystBlock_movableAmethystMixin.java

@@ -0,0 +1,45 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.BuddingAmethystBlock;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.block.piston.PistonBehavior;
+import net.minecraft.enchantment.EnchantmentHelper;
+import net.minecraft.enchantment.Enchantments;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.ItemStack;
+import net.minecraft.item.Items;
+import net.minecraft.item.PickaxeItem;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import org.jetbrains.annotations.Nullable;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(BuddingAmethystBlock.class)
+public class BuddingAmethystBlock_movableAmethystMixin extends Block {
+    public BuddingAmethystBlock_movableAmethystMixin(Settings settings) {
+        super(settings);
+    }
+
+    @Inject(at = @At("HEAD"), method = "getPistonBehavior(Lnet/minecraft/block/BlockState;)Lnet/minecraft/block/piston/PistonBehavior;", cancellable = true)
+    void getPistonBehavior(BlockState state, CallbackInfoReturnable<PistonBehavior> cir) {
+        if (CarpetSettings.movableAmethyst) cir.setReturnValue(PistonBehavior.NORMAL);
+    }
+
+    @Override
+    public void afterBreak(World world, PlayerEntity player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack stack) {
+        super.afterBreak(world, player, pos, state, blockEntity, stack);
+        // doing it here rather than though loottables since loottables are loaded on reload
+        // drawback - not controlled via loottables, but hey
+        if (CarpetSettings.movableAmethyst &&
+                stack.getItem() instanceof PickaxeItem &&
+                EnchantmentHelper.getLevel(Enchantments.SILK_TOUCH, stack) > 0
+        )
+            dropStack(world, pos, Items.BUDDING_AMETHYST.getDefaultStack());
+    }
+}