SafeBlockReplacer.java

package com.fireball1725.graves.helpers;

import net.minecraft.block.BlockAir;
import net.minecraft.block.state.IBlockState;
import net.minecraft.util.BlockPos;
import net.minecraft.world.World;

public class SafeBlockReplacer {


    private static boolean CheckBlock(World world, BlockPos blockPos, boolean forceAir) {
        IBlockState blockState = world.getBlockState(blockPos);

        if (blockState == null)
            return true;

        if (blockState.getBlock() instanceof BlockAir && forceAir)
            return true;
        else if (forceAir)
            return false;

        if (blockState.getBlock().hasTileEntity(blockState))
            return false;

        if (blockState.getBlock().getBlockHardness(null, null) == -1.0F)
            return false;

        return true;
    }

    private static boolean CheckGraveSite(World world, BlockPos blockPos) {
        int x = blockPos.getX();
        int y = blockPos.getY();
        int z = blockPos.getZ();

        boolean placeGrave = true;

        if (!CheckBlock(world, blockPos, true))
            placeGrave = false;

        if (!CheckBlock(world, blockPos.east()), true))
            placeGrave = false;

        if (!CheckBlock(world, blockPos.down()), false))
            placeGrave = false;

        if (!CheckBlock(world, blockPos.east().down(), false))
            placeGrave = false;

        return placeGrave;
    }

    public static BlockPos GetSafeGraveSite(World world, BlockPos blockPos) {
        BlockPos finalBlockPos = CheckSafeGraveSite(world, blockPos);

        if (finalBlockPos == null) {
            LogHelper.info(">>> Unable to find place to put grave...");

            finalBlockPos = world.getTopSolidOrLiquidBlock(blockPos);
            finalBlockPos = CheckSafeGraveSite(world, finalBlockPos);
        }

        if (finalBlockPos == null) {
            LogHelper.info(">>> Sorry, still can't find a good place...");

            finalBlockPos = blockPos;
        }

        return finalBlockPos;
    }

    public static BlockPos CheckSafeGraveSite(World world, BlockPos blockPos) {
        int x = blockPos.getX();
        int y = blockPos.getY();
        int z = blockPos.getZ();

        if (y < 1) {
            y = 9;
        }

        if (y > 256) {
            y = 246;
        }

        int searchRadius = 8;
        for (int searchY = -searchRadius; searchY <= searchRadius; searchY++) {
            for (int searchX = -searchRadius; searchX <= searchRadius; searchX++) {
                for (int searchZ = -searchRadius; searchZ <= searchRadius; searchZ++) {
                    BlockPos pos = new BlockPos(x + searchX, y + searchY, z + searchZ);
                    if (CheckGraveSite(world, pos) {
                        return pos;
                    }
                }
            }
        }

        return null;
    }
}