1 /* 2 * Copyright (C) 2013 Nicolas Bonnefon and other contributors 3 * 4 * This file is part of glogg. 5 * 6 * glogg is free software: you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation, either version 3 of the License, or 9 * (at your option) any later version. 10 * 11 * glogg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with glogg. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #ifndef SESSION_H 21 #define SESSION_H 22 23 #include <memory> 24 #include <unordered_map> 25 #include <string> 26 27 #include <QDateTime> 28 29 class ViewInterface; 30 class LogData; 31 class LogFilteredData; 32 33 // The session is responsible for maintaining the list of open log files 34 // and their association with Views. 35 // It also maintains the domain objects which are common to all log files 36 // (SearchHistory, FileHistory, QFPattern...) 37 class Session { 38 public: 39 Session(); 40 ~Session(); 41 42 // No copy/assignment please 43 Session( const Session& ) = delete; 44 Session& operator =( const Session& ) = delete; 45 46 // Return the view associated to a file if it is open 47 // The filename must be strictly identical to trigger a match 48 // (no match in case of e.g. relative vs. absolute pathname. 49 ViewInterface* getViewIfOpen( const std::string& file_name ) const; 50 // Open a new file, starts its asynchronous loading, and construct a new 51 // view for it (the caller passes a factory to build the concrete view) 52 // The ownership of the view is given to the caller 53 // Throw exceptions if the file is already open or if it cannot be open. 54 ViewInterface* open( const std::string& file_name, 55 std::function<ViewInterface*()> view_factory ); 56 // Close the file identified by the view passed 57 // Throw an exception if it does not exist. 58 void close( const ViewInterface* view ); 59 // Get the size (in bytes) and number of lines in the current file. 60 // The file is identified by the view attached to it. 61 void getFileInfo( const ViewInterface* view, uint64_t* fileSize, 62 uint32_t* fileNbLine, QDateTime* lastModified ) const; 63 64 private: 65 struct OpenFile { 66 std::string fileName; 67 std::shared_ptr<LogData> logData; 68 std::shared_ptr<LogFilteredData> logFilteredData; 69 ViewInterface* view; 70 }; 71 72 // Open a file without checking if it is existing/readable 73 ViewInterface* openAlways( const std::string& file_name, 74 std::function<ViewInterface*()> view_factory ); 75 // Find an open file from its associated view 76 OpenFile* findOpenFileFromView( const ViewInterface* view ); 77 const OpenFile* findOpenFileFromView( const ViewInterface* view ) const; 78 79 // List of open files 80 typedef std::unordered_map<const ViewInterface*, OpenFile> OpenFileMap; 81 OpenFileMap open_files_; 82 }; 83 84 #endif 85