AIRobotSearchStackRequest.java

/**
 * Copyright (c) 2011-2014, SpaceToad and the BuildCraft Team
 * http://www.mod-buildcraft.com
 *
 * 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.robots;

import java.util.Collection;

import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;

import net.minecraftforge.common.util.ForgeDirection;

import buildcraft.api.gates.ActionParameterItemStack;
import buildcraft.api.gates.IStatementParameter;
import buildcraft.api.robots.AIRobot;
import buildcraft.api.robots.EntityRobotBase;
import buildcraft.api.robots.IRequestProvider;
import buildcraft.api.robots.StackRequest;
import buildcraft.core.inventory.StackHelper;
import buildcraft.core.inventory.filters.IStackFilter;
import buildcraft.silicon.statements.ActionRobotFilter;
import buildcraft.silicon.statements.ActionStationRequestItems;
import buildcraft.silicon.statements.ActionStationRequestItemsMachine;
import buildcraft.transport.Pipe;
import buildcraft.transport.gates.ActionIterator;
import buildcraft.transport.gates.ActionSlot;

public class AIRobotSearchStackRequest extends AIRobot {

	public StackRequest request = null;

	private Collection<ItemStack> blackList;

	private IStackFilter filter;

	public AIRobotSearchStackRequest(EntityRobotBase iRobot) {
		super(iRobot);
	}

	public AIRobotSearchStackRequest(EntityRobotBase iRobot, IStackFilter iFilter, Collection<ItemStack> iBlackList) {
		super(iRobot);

		blackList = iBlackList;
		filter = iFilter;
	}

	@Override
	public void start() {
		startDelegateAI(new AIRobotSearchStation(robot, new StationProviderFilter(), robot.getZoneToWork()));
	}

	@Override
	public void delegateAIEnded(AIRobot ai) {
		if (ai instanceof AIRobotSearchStation) {
			if (!ai.success()) {
				terminate();
			} else {
				request = getOrderFromRequestingAction(((AIRobotSearchStation) ai).targetStation);

				if (request == null) {
					request = getOrderFromRequestingStation(((AIRobotSearchStation) ai).targetStation, true);
				}

				terminate();
			}
		}
	}

	@Override
	public boolean success() {
		return request != null;
	}

	private boolean isBlacklisted(ItemStack stack) {
		for (ItemStack black : blackList) {
			if (StackHelper.isMatchingItem(stack, black)) {
				return true;
			}
		}

		return false;
	}

	private StackRequest getOrderFromRequestingStation(DockingStation station, boolean take) {
		if (!ActionRobotFilter.canInteractWithItem(station, filter, ActionStationRequestItemsMachine.class)) {
			return null;
		}

		for (ForgeDirection dir : ForgeDirection.VALID_DIRECTIONS) {
			TileEntity nearbyTile = robot.worldObj.getTileEntity(station.x() + dir.offsetX, station.y()
					+ dir.offsetY, station.z()
					+ dir.offsetZ);

			if (nearbyTile instanceof IRequestProvider) {
				IRequestProvider provider = (IRequestProvider) nearbyTile;

				for (int i = 0; i < provider.getNumberOfRequests(); ++i) {
					StackRequest requestFound = provider.getAvailableRequest(i);

					if (requestFound != null
							&& !isBlacklisted(requestFound.stack)
							&& filter.matches(requestFound.stack)) {
						requestFound.station = station;

						if (take) {
							if (provider.takeRequest(i, robot)) {
								return requestFound;
							}
						} else {
							return requestFound;
						}
					}
				}
			}
		}

		return null;
	}

	private StackRequest getOrderFromRequestingAction(DockingStation station) {
		boolean actionFound = false;

		Pipe pipe = station.getPipe().pipe;

		for (ActionSlot s : new ActionIterator(pipe)) {
			if (s.action instanceof ActionStationRequestItems) {
				for (IStatementParameter p : s.parameters) {
					ActionParameterItemStack param = (ActionParameterItemStack) p;

					if (param != null && !isBlacklisted(param.getItemStackToDraw())) {
						StackRequest req = new StackRequest();
						req.station = station;
						req.stack = param.getItemStackToDraw();

						return req;
					}
				}
			}
		}

		return null;
	}

	private class StationProviderFilter implements IStationFilter {

		@Override
		public boolean matches(DockingStation station) {
			return getOrderFromRequestingAction(station) != null
					|| getOrderFromRequestingStation(station, false) != null;
		}
	}

}