1 /* 2 * Copyright (c) 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 IGE_FILEMONITOR_H 17 #define IGE_FILEMONITOR_H 18 19 #include <string> 20 #include <string_view> 21 #include <unordered_map> 22 #include <vector> 23 24 namespace ige { 25 class FileMonitor { 26 public: 27 /** Adds path to watch list, the monitor will recursively monitor all files in this directory and it's subtree. 28 @param path Path to directory that is being monitored, such as 'x:/images/' or './images'. 29 @return True if path is succesfully added to watch list, otherwise false. 30 */ 31 bool AddPath(std::string_view path); 32 33 /** Removes path from watch list, the monitor will no longer watch files in this directory or it's subtree. 34 @param path Path to directory to be no longer monitored. 35 @return True if the watch is successfully removed, otherwise false. 36 */ 37 bool RemovePath(std::string_view path); 38 39 /** Scans for file modifications since last call to this function. 40 @param aAdded List of files that were added. 41 @param aRemoved List of files that were removed. 42 @param aModified List of files that were modified. 43 */ 44 void ScanModifications( 45 std::vector<std::string>& added, std::vector<std::string>& removed, std::vector<std::string>& modified); 46 47 std::vector<std::string> GetMonitoredFiles() const; 48 49 private: 50 struct FileInfo { 51 time_t timestamp; 52 }; 53 54 bool AddFile(std::string_view path); 55 bool RemoveFile(const std::string& path); 56 57 bool IsWatchingDirectory(std::string_view path); 58 bool IsWatchingSubDirectory(std::string_view path); 59 60 std::vector<std::string> mDirectories; 61 std::unordered_map<std::string, FileInfo> mFiles; 62 }; 63 64 } // namespace ige 65 66 #endif // IGE_FILEMONITOR_H