/**
 *    Copyright (C) 2019-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.
 */

#include "mongo/base/transaction_error.h"

namespace mongo {

bool isTransientTransactionError(ErrorCodes::Error code,
                                 bool hasWriteConcernError,
                                 bool isCommitTransaction) {
    bool isTransient;
    switch (code) {
        case ErrorCodes::WriteConflict:
        case ErrorCodes::LockTimeout:
        case ErrorCodes::PreparedTransactionInProgress:
            isTransient = true;
            break;
        default:
            isTransient = false;
            break;
    }

    isTransient |= ErrorCodes::isSnapshotError(code) || ErrorCodes::isNeedRetargettingError(code) ||
        code == ErrorCodes::StaleDbVersion;

    if (isCommitTransaction) {
        // On NoSuchTransaction it's safe to retry the whole transaction only if the data cannot be
        // rolled back.
        isTransient |= code == ErrorCodes::NoSuchTransaction && !hasWriteConcernError;
    } else {
        // For commands other than "commitTransaction", we know there's no side-effect for these
        // errors, but it's not true for "commitTransaction" if a failover happens.
        isTransient |= ErrorCodes::isNotMasterError(code) || ErrorCodes::isShutdownError(code) ||
            ErrorCodes::isNetworkError(code) || code == ErrorCodes::NoSuchTransaction;
    }

    return isTransient;
}

}  // namespace mongo