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/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2011-2016 Incapture Technologies LLC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package rapture.dsl.dparse;

import rapture.common.repo.CommitObject;

public class RelativeVersion extends BaseDirective {
    private int versionsBack;
    private int counter = 0;
    private String context = null;

    @Override
    public boolean incorrect(CommitObject cObj) {
        // If the CommitObject contains the description of the change that
        // matches the document name (context)
        // , increment the counter

        if (context == null) {
            counter++;
        } else {
            if (cObj.getChanges().contains(context)) {
                counter++;
            }
        }
        if (counter > versionsBack) {
            setCommit(cObj);
            return false;
        }
        return true;
    }

    @Override
    public void reset(String context) {
        this.context = context;
        counter = 0;
    }

    public void setBack(String back) {
        versionsBack = -1 * Integer.parseInt(back);
    }

    public String toString() {
        return "" + versionsBack + " versions back";
    }
}