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FileDownload.h
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FileDownload.h
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/*
* Copyright (C) 2019 Me and My Shadow
*
* This file is part of Me and My Shadow.
*
* Me and My Shadow is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Me and My Shadow is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Me and My Shadow. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef FILE_DOWNLOAD_H
#define FILE_DOWNLOAD_H
#include <string>
//Class that will download file asynchronously.
//Currently it only supports download one file at a time,
//but curl_multi function supports downloading many files in parallel.
class FileDownload {
public:
enum DownloadStatus {
NONE,
DOWNLOADING,
FINISHED,
DOWNLOAD_ERROR,
CANCELLED,
} downloadStatus;
//Download progress, in 0-1.
float downloadProgress;
std::string downloadURL, downloadDestination;
private:
void *curl_, *curlm_, *dest_;
public:
FileDownload();
FileDownload(const FileDownload& other) = delete;
~FileDownload();
//Method that will perform download progress update.
void perform();
//Method that will cancel current download task.
void cancel();
//Method that will start downloading a file.
//url: The file to download.
//destination: The destination file or path where the file will be downloaded to.
//isPath: Specifies destination is path or not.
//NOTE: This function only works when currently it's not downloading.
void downloadFile(const std::string &url, const std::string &destination, bool isPath);
//Method that will wait until file downloading finished.
//Returns: True if it succeeds without errors or user interrupt. Check 'downloadStatus' for more info.
//NOTE: This function only works when currently it's downloading.
bool waitUntilFinished();
};
#endif

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