1 /*
2  * Copyright (C) 2024-2024 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef OHOS_MEDIA_BURST_KEY_GENERATOR_H
17 #define OHOS_MEDIA_BURST_KEY_GENERATOR_H
18 
19 #include <mutex>
20 
21 #include "backup_const.h"
22 
23 namespace OHOS::Media {
24 class BurstKeyGenerator {
25 public:
26     std::string FindBurstKey(const FileInfo &fileInfo);
27 
28 private:
29     std::string FindTitlePrefix(const FileInfo &fileInfo);
30     std::string FindGroupHash(const FileInfo &fileInfo);
31     int32_t FindGroupIndex(const FileInfo &fileInfo);
32     std::string FindObjectHash(const FileInfo &fileInfo);
33     std::string GenerateUuid();
34     std::string ToString(const FileInfo &fileInfo);
35 
36 private:
37     const std::string TITLE_KEY_WORDS_OF_BURST = "_BURST";
38     enum { BURST_COVER_TYPE = 1, BURST_MEMBER_TYPE = 2, UUID_STR_LENGTH = 37, DISPLAY_NAME_PREFIX_LENGTH = 20 };
39     std::unordered_map<std::string, std::string> groupHashMap_;
40     std::unordered_map<std::string, int32_t> objectHashMap_;
41     std::mutex burstKeyLock_;
42 };
43 }  // namespace OHOS::Media
44 
45 #endif  // OHOS_MEDIA_BURST_KEY_GENERATOR_H