buildcraft.core.lib.utils.Utils.java Source code

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/**
 * Copyright (c) 2011-2015, SpaceToad and the BuildCraft Team
 * http://www.mod-buildcraft.com
 * <p/>
 * BuildCraft is distributed under the terms of the Minecraft Mod Public
 * License 1.0, or MMPL. Please check the contents of the license located in
 * http://www.mod-buildcraft.com/MMPL-1.0.txt
 */
package buildcraft.core.lib.utils;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;

import net.minecraft.block.Block;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.inventory.IInventory;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.MathHelper;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;

import cpw.mods.fml.common.network.internal.FMLProxyPacket;
import net.minecraftforge.common.util.FakePlayer;
import net.minecraftforge.common.util.ForgeDirection;

import buildcraft.api.core.IAreaProvider;
import buildcraft.api.core.Position;
import buildcraft.api.power.IEngine;
import buildcraft.api.power.ILaserTarget;
import buildcraft.api.tiles.ITileAreaProvider;
import buildcraft.api.transport.IInjectable;
import buildcraft.api.transport.IPipeTile;
import buildcraft.core.CompatHooks;
import buildcraft.core.DefaultProps;
import buildcraft.core.internal.IDropControlInventory;
import buildcraft.core.internal.IFramePipeConnection;
import buildcraft.core.lib.block.TileBuildCraft;
import buildcraft.core.lib.engines.BlockEngineBase;
import buildcraft.core.lib.inventory.ITransactor;
import buildcraft.core.lib.inventory.InvUtils;
import buildcraft.core.lib.inventory.Transactor;
import buildcraft.core.lib.network.Packet;

public final class Utils {
    public static final boolean CAULDRON_DETECTED;
    public static final XorShift128Random RANDOM = new XorShift128Random();
    private static final List<ForgeDirection> directions = new ArrayList<ForgeDirection>(
            Arrays.asList(ForgeDirection.VALID_DIRECTIONS));

    static {
        boolean cauldron = false;
        try {
            cauldron = Utils.class.getClassLoader().loadClass("org.spigotmc.SpigotConfig") != null;
        } catch (ClassNotFoundException e) {

        }
        CAULDRON_DETECTED = cauldron;
    }

    /**
     * Deactivate constructor
     */
    private Utils() {
    }

    public static boolean isRegistered(Block block) {
        return block != null && Block.getIdFromBlock(block) >= 0;
    }

    public static boolean isRegistered(Item item) {
        return item != null && Item.getIdFromItem(item) >= 0;
    }

    public static boolean isRegistered(ItemStack stack) {
        if (stack == null) {
            return false;
        }
        Block block = Block.getBlockFromItem(stack.getItem());
        if (block instanceof BlockEngineBase) {
            return isRegistered(block) && ((BlockEngineBase) block).hasEngine(stack.getItemDamage());
        }
        return isRegistered(stack.getItem());
    }

    /**
     * Tries to add the passed stack to any valid inventories around the given
     * coordinates.
     *
     * @param stack
     * @param world
     * @param x
     * @param y
     * @param z
     * @return amount used
     */
    public static int addToRandomInventoryAround(World world, int x, int y, int z, ItemStack stack) {
        Collections.shuffle(directions);
        for (ForgeDirection orientation : directions) {
            Position pos = new Position(x, y, z, orientation);
            pos.moveForwards(1.0);

            TileEntity tileInventory = BlockUtils.getTileEntity(world, (int) pos.x, (int) pos.y, (int) pos.z);
            ITransactor transactor = Transactor.getTransactorFor(tileInventory);
            if (transactor != null && !(tileInventory instanceof IEngine)
                    && !(tileInventory instanceof ILaserTarget)
                    && transactor.add(stack, orientation.getOpposite(), false).stackSize > 0) {
                return transactor.add(stack, orientation.getOpposite(), true).stackSize;
            }
        }
        return 0;

    }

    /**
     * Returns the cardinal direction of the entity depending on its
     * rotationYaw
     */
    public static ForgeDirection get2dOrientation(EntityLivingBase entityliving) {
        ForgeDirection[] orientationTable = { ForgeDirection.SOUTH, ForgeDirection.WEST, ForgeDirection.NORTH,
                ForgeDirection.EAST };
        int orientationIndex = MathHelper.floor_double((entityliving.rotationYaw + 45.0) / 90.0) & 3;
        return orientationTable[orientationIndex];
    }

    /**
     * Look around the tile given in parameter in all 6 position, tries to add
     * the items to a random injectable tile around. Will make sure that the location
     * from which the items are coming from (identified by the from parameter)
     * isn't used again so that entities doesn't go backwards. Returns true if
     * successful, false otherwise.
     */
    public static int addToRandomInjectableAround(World world, int x, int y, int z, ForgeDirection from,
            ItemStack stack) {
        List<IInjectable> possiblePipes = new ArrayList<IInjectable>();
        List<ForgeDirection> pipeDirections = new ArrayList<ForgeDirection>();

        for (ForgeDirection side : ForgeDirection.VALID_DIRECTIONS) {
            if (from.getOpposite() == side) {
                continue;
            }

            Position pos = new Position(x, y, z, side);

            pos.moveForwards(1.0);

            TileEntity tile = BlockUtils.getTileEntity(world, (int) pos.x, (int) pos.y, (int) pos.z);

            if (tile instanceof IInjectable) {
                if (!((IInjectable) tile).canInjectItems(side.getOpposite())) {
                    continue;
                }

                possiblePipes.add((IInjectable) tile);
                pipeDirections.add(side.getOpposite());
            } else {
                IInjectable wrapper = CompatHooks.INSTANCE.getInjectableWrapper(tile, side);
                if (wrapper != null) {
                    possiblePipes.add(wrapper);
                    pipeDirections.add(side.getOpposite());
                }
            }
        }

        if (possiblePipes.size() > 0) {
            int choice = RANDOM.nextInt(possiblePipes.size());

            IInjectable pipeEntry = possiblePipes.get(choice);

            return pipeEntry.injectItem(stack, true, pipeDirections.get(choice), null);
        }
        return 0;
    }

    public static void dropTryIntoPlayerInventory(World world, int x, int y, int z, ItemStack stack,
            EntityPlayer player) {
        if (player != null && player.inventory.addItemStackToInventory(stack)) {
            if (player instanceof EntityPlayerMP) {
                ((EntityPlayerMP) player).sendContainerToPlayer(player.inventoryContainer);
            }
        }
        InvUtils.dropItems(world, stack, x, y, z);
    }

    public static IAreaProvider getNearbyAreaProvider(World world, int i, int j, int k) {
        for (TileEntity t : (List<TileEntity>) world.loadedTileEntityList) {
            if (t instanceof ITileAreaProvider && ((ITileAreaProvider) t).isValidFromLocation(i, j, k)) {
                return (IAreaProvider) t;
            }
        }

        return null;
    }

    public static void preDestroyBlock(World world, int i, int j, int k) {
        TileEntity tile = BlockUtils.getTileEntity(world, i, j, k);

        if (tile instanceof IInventory && !world.isRemote) {
            if (!(tile instanceof IDropControlInventory) || ((IDropControlInventory) tile).doDrop()) {
                InvUtils.dropItems(world, (IInventory) tile, i, j, k);
                InvUtils.wipeInventory((IInventory) tile);
            }
        }

        if (tile instanceof TileBuildCraft) {
            ((TileBuildCraft) tile).destroy();
        }
    }

    public static boolean isFakePlayer(EntityPlayer player) {
        if (player instanceof FakePlayer) {
            return true;
        }

        // Tip donated by skyboy - addedToChunk must be set to false by a fake player
        // or it becomes a chunk-loading entity.
        if (!player.addedToChunk) {
            return true;
        }

        return false;
    }

    public static boolean checkPipesConnections(TileEntity tile1, TileEntity tile2) {
        if (tile1 == null || tile2 == null) {
            return false;
        }

        if (!(tile1 instanceof IPipeTile) && !(tile2 instanceof IPipeTile)) {
            return false;
        }

        ForgeDirection o = ForgeDirection.UNKNOWN;

        if (tile1.xCoord - 1 == tile2.xCoord) {
            o = ForgeDirection.WEST;
        } else if (tile1.xCoord + 1 == tile2.xCoord) {
            o = ForgeDirection.EAST;
        } else if (tile1.yCoord - 1 == tile2.yCoord) {
            o = ForgeDirection.DOWN;
        } else if (tile1.yCoord + 1 == tile2.yCoord) {
            o = ForgeDirection.UP;
        } else if (tile1.zCoord - 1 == tile2.zCoord) {
            o = ForgeDirection.NORTH;
        } else if (tile1.zCoord + 1 == tile2.zCoord) {
            o = ForgeDirection.SOUTH;
        }

        if (tile1 instanceof IPipeTile && !((IPipeTile) tile1).isPipeConnected(o)) {
            return false;
        }

        if (tile2 instanceof IPipeTile && !((IPipeTile) tile2).isPipeConnected(o.getOpposite())) {
            return false;
        }

        return true;
    }

    public static boolean checkLegacyPipesConnections(IBlockAccess blockAccess, int x1, int y1, int z1, int x2,
            int y2, int z2) {

        Block b1 = blockAccess.getBlock(x1, y1, z1);
        Block b2 = blockAccess.getBlock(x2, y2, z2);

        if (!(b1 instanceof IFramePipeConnection) && !(b2 instanceof IFramePipeConnection)) {
            return false;
        }

        if (b1 instanceof IFramePipeConnection
                && !((IFramePipeConnection) b1).isPipeConnected(blockAccess, x1, y1, z1, x2, y2, z2)) {
            return false;
        }

        if (b2 instanceof IFramePipeConnection
                && !((IFramePipeConnection) b2).isPipeConnected(blockAccess, x2, y2, z2, x1, y1, z1)) {
            return false;
        }

        return true;

    }

    public static boolean isPipeConnected(IBlockAccess access, int x, int y, int z, ForgeDirection dir,
            IPipeTile.PipeType type) {
        TileEntity tile = access.getTileEntity(x + dir.offsetX, y + dir.offsetY, z + dir.offsetZ);
        return tile instanceof IPipeTile && ((IPipeTile) tile).getPipeType() == type
                && ((IPipeTile) tile).isPipeConnected(dir.getOpposite());
    }

    public static int[] createSlotArray(int first, int count) {
        int[] slots = new int[count];
        for (int k = first; k < first + count; k++) {
            slots[k - first] = k;
        }
        return slots;
    }

    /**
     * This subprogram transforms a packet into a FML packet to be send in the
     * minecraft default packet mechanism. This always use BC-CORE as a
     * channel, and as a result, should use discriminators declared there.
     *
     * WARNING! The implementation of this subprogram relies on the internal
     * behavior of #FMLIndexedMessageToMessageCodec (in particular the encode
     * member). It is probably opening a maintenance issue and should be
     * replaced eventually by some more solid mechanism.
     */
    public static FMLProxyPacket toPacket(Packet packet, int discriminator) {
        ByteBuf buf = Unpooled.buffer();

        buf.writeByte((byte) discriminator);
        packet.writeData(buf);

        return new FMLProxyPacket(buf, DefaultProps.NET_CHANNEL_NAME + "-CORE");
    }
}