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[1.14.4] onBlockActivated gets called 2 times


Tieso2001
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I have a tileEntity with 1 inventory slot with a max stacksize of 1. I'm trying to make it so that, when rightclicked, the item in your hand will be inserted into the slot or when already full, the item in the slot will be extracted into your inventory. I've got it working for the most part, but when I test it sometimes it works and sometimes not. I tried debugging it and it turns out that onBlockActivated sometimes fires 2 times, so it inserts and then extracts immediately. How do I fix this / stop this from happening?

 

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@Override
    public boolean onBlockActivated(BlockState state, World worldIn, BlockPos pos, PlayerEntity player, Hand handIn, BlockRayTraceResult hit) {

        if (worldIn.isRemote) return true;
        if (!(worldIn.getTileEntity(pos) instanceof QuernTileEntity)) return false;

        LazyOptional<IItemHandler> handler = worldIn.getTileEntity(pos).getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, hit.getFace());
        handler.ifPresent(inv -> {

            ItemStack heldItem = player.getHeldItem(handIn).copy();
            heldItem.setCount(1);

            if (inv.insertItem(0, heldItem, true).isEmpty() && !heldItem.isEmpty()) {
                player.getHeldItem(handIn).shrink(1);
                inv.insertItem(0, heldItem, false);
            }
            else if (!inv.extractItem(0, 1, true).isEmpty()) {
                ItemStack extractedItem = inv.extractItem(0, 1, true);
                ItemHandlerHelper.giveItemToPlayer(player, extractedItem);
                inv.extractItem(0, 1, false);
            }
        });

        return true;
    }

 

 

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