/**
 *    Copyright (C) 2018-present MongoDB, Inc.
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the Server Side Public License, version 1,
 *    as published by MongoDB, Inc.
 *
 *    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
 *    Server Side Public License for more details.
 *
 *    You should have received a copy of the Server Side Public License
 *    along with this program. If not, see
 *    <http://www.mongodb.com/licensing/server-side-public-license>.
 *
 *    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 Server Side 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 "mongo/base/status.h"
#include "mongo/base/string_data.h"

namespace mongo {

class BSONObj;

namespace repl {
class OpTime;
}  // namespace repl

/**
 * Finds an object-typed field named "fieldName" in "object" that represents an OpTime.
 *
 * The OpTime objects have two fields, a Timestamp ts and numeric term.
 *
 * Returns Status::OK() and sets *out to the found element's OpTime value on success.  Returns
 * ErrorCodes::NoSuchKey if there are no matches for "fieldName" or either subobject field is
 * missing, and ErrorCodes::TypeMismatch if the type of the matching element is not Object, the ts
 * subfield is not Timestamp, or the term subfield is not numeric.  For return values other than
 * Status::OK(), the resulting value of "*out" is undefined.
 */
Status bsonExtractOpTimeField(const BSONObj& object, StringData fieldName, repl::OpTime* out);

}  // namespace mongo