/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#define LOG_TAG "KvStoreUtils"

#include "kvstore_utils.h"
#include <limits>

namespace OHOS {
namespace DistributedKv {
constexpr int32_t HEAD_SIZE = 3;
constexpr int32_t END_SIZE = 3;
constexpr int32_t MIN_SIZE = HEAD_SIZE + END_SIZE + 3;
constexpr const char *REPLACE_CHAIN = "***";
constexpr const char *DEFAULT_ANONYMOUS = "******";
std::atomic<uint64_t> KvStoreUtils::sequenceId_{ 0 };
std::string KvStoreUtils::ToBeAnonymous(const std::string &name)
{
    if (name.length() <= HEAD_SIZE) {
        return DEFAULT_ANONYMOUS;
    }

    if (name.length() < MIN_SIZE) {
        return (name.substr(0, HEAD_SIZE) + REPLACE_CHAIN);
    }

    return (name.substr(0, HEAD_SIZE) + REPLACE_CHAIN + name.substr(name.length() - END_SIZE, END_SIZE));
}

uint64_t KvStoreUtils::GenerateSequenceId()
{
    uint64_t seqId = ++sequenceId_;
    if (seqId == std::numeric_limits<uint64_t>::max()) {
        return ++sequenceId_;
    }
    return seqId;
}
} // namespace DistributedKv
} // namespace OHOS