/*
 * WorldEdit, a Minecraft world manipulation toolkit
 * Copyright (C) sk89q <http://www.sk89q.com>
 * Copyright (C) WorldEdit team and contributors
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.sk89q.worldedit.extent;

import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.WorldEditException;
import com.sk89q.worldedit.blocks.BaseBlock;
import com.sk89q.worldedit.history.change.BlockChange;
import com.sk89q.worldedit.history.changeset.ChangeSet;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * Stores changes to a {@link ChangeSet}.
 */
public class ChangeSetExtent extends AbstractDelegateExtent {

    private final ChangeSet changeSet;

    /**
     * Create a new instance.
     *
     * @param extent the extent
     * @param changeSet the change set
     */
    public ChangeSetExtent(Extent extent, ChangeSet changeSet) {
        super(extent);
        checkNotNull(changeSet);
        this.changeSet = changeSet;
    }

    @Override
    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
        BaseBlock previous = getBlock(location);
        changeSet.add(new BlockChange(location.toBlockVector(), previous, block));
        return super.setBlock(location, block);
    }

}