1 /*
2  * Copyright (c) 2021-2024 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 WHITE_LIST_UTIL_H
17 #define WHITE_LIST_UTIL_H
18 
19 #include <mutex>
20 #include <unordered_set>
21 #include <fstream>
22 #include <sstream>
23 
24 #include "constants_dinput.h"
25 
26 namespace OHOS {
27 namespace DistributedHardware {
28 namespace DistributedInput {
29 using TYPE_KEY_CODE_VEC = std::vector<int32_t>;
30 using TYPE_COMBINATION_KEY_VEC = std::vector<TYPE_KEY_CODE_VEC>;
31 using TYPE_WHITE_LIST_VEC = std::vector<TYPE_COMBINATION_KEY_VEC>;
32 using TYPE_DEVICE_WHITE_LIST_MAP = std::map<std::string, TYPE_WHITE_LIST_VEC>;
33 
34 struct WhiteListItemHash {
35     std::string hash;
36 
37     // the keys num
38     int32_t len;
39 
WhiteListItemHashWhiteListItemHash40     WhiteListItemHash() : hash(""), len(0) {}
41 
WhiteListItemHashWhiteListItemHash42     WhiteListItemHash(std::string &hash, int32_t len) : hash(hash), len(len) {}
43 };
44 
45 class WhiteListUtil {
46 public:
47     static WhiteListUtil &GetInstance(void);
48     int32_t SyncWhiteList(const std::string &deviceId, const TYPE_WHITE_LIST_VEC &vecWhiteList);
49     int32_t ClearWhiteList(const std::string &deviceId);
50     int32_t ClearWhiteList(void);
51     int32_t GetWhiteList(const std::string &deviceId, TYPE_WHITE_LIST_VEC &vecWhiteList);
52     bool GetWhiteListCfgFile(std::ifstream &ifs);
53     /*
54      * check is event in white list of deviceId
55      *
56      * Return:
57      *   true: event in white list of this device
58      *   false: event not in white list of this device, or white list of this device not exist
59      */
60     bool IsNeedFilterOut(const std::string &deviceId, const BusinessEvent &event);
61 private:
62     int32_t Init();
63     WhiteListUtil();
64     ~WhiteListUtil();
65     WhiteListUtil(const WhiteListUtil &other) = delete;
66     const WhiteListUtil &operator=(const WhiteListUtil &other) = delete;
67     void ReadLineDataStepOne(std::string &column, TYPE_KEY_CODE_VEC &vecKeyCode,
68         TYPE_COMBINATION_KEY_VEC &vecCombinationKey) const;
69     void GetCombKeysHash(TYPE_COMBINATION_KEY_VEC combKeys, std::unordered_set<std::string> &targetSet);
70     void GetAllComb(TYPE_COMBINATION_KEY_VEC vecs, WhiteListItemHash hash,
71         int32_t targetLen, std::unordered_set<std::string> &hashSets);
72     std::string GetBusinessEventHash(const BusinessEvent &event);
73     bool IsValidLine(const std::string &line) const;
74     bool CheckIsNumber(const std::string &str) const;
75     void SplitCombinationKey(std::string &line, TYPE_KEY_CODE_VEC &vecKeyCode,
76         TYPE_COMBINATION_KEY_VEC &vecCombinationKey) const;
77 private:
78     TYPE_DEVICE_WHITE_LIST_MAP mapDeviceWhiteList_;
79     std::map<std::string, std::unordered_set<std::string>> combKeysHashMap_;
80     std::mutex mutex_;
81 };
82 } // namespace DistributedInput
83 } // namespace DistributedHardware
84 } // namespace OHOS
85 
86 #endif // WHITE_LIST_UTIL_H
87