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/**
 *    Copyright (C) 2015 MongoDB Inc.
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    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 Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the GNU Affero General Public License in all respects for
 *    all of the code used other than as permitted herein. If you modify file(s)
 *    with this exception, you may extend this exception to your version of the
 *    file(s), but you are not obligated to do so. If you do not wish to do so,
 *    delete this exception statement from your version. If you delete this
 *    exception statement from all source files in the program, then also delete
 *    it in the license file.
 */

#pragma once

#include <string>

#include "mongo/base/status.h"
#include "mongo/stdx/chrono.h"

namespace mongo {

class BSONObjBuilder;

namespace repl {

class ReadConcernResponse {
public:
    static const std::string kWaitedMSFieldName;

    /**
     * Constructs a default response that has OK status, and wait is false.
     */
    ReadConcernResponse();

    /**
     * Constructs a response with the given status with wait equals to false.
     */
    explicit ReadConcernResponse(Status status);

    /**
     * Constructs a response with wait set to true along with the given parameters.
     */
    ReadConcernResponse(Status status, stdx::chrono::milliseconds duration);

    /**
     * Appends to the builder the timeout and duration info if didWait() is true.
     * Note: does not include status.
     */
    void appendInfo(BSONObjBuilder* builder);

    bool didWait() const;

    /**
     * Returns the duration waited for the ReadConcern to be satisfied.
     * Returns 0 if didWait is false.
     */
    stdx::chrono::milliseconds getDuration() const;

    /**
     * Returns more details about an error if it occurred.
     */
    Status getStatus() const;

private:
    ReadConcernResponse(Status status, stdx::chrono::milliseconds duration, bool waited);

    bool _waited;
    stdx::chrono::milliseconds _duration = stdx::chrono::milliseconds(0);
    Status _status;
};

}  // namespace repl
}  // namespace mongo