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/**
* Copyright (C) 2021 Saturneric <[email protected]>
*
* This file is part of GpgFrontend.
*
* GpgFrontend 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.
*
* GpgFrontend 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 GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
*
* The initial version of the source code is inherited from
* the gpg4usb project, which is under GPL-3.0-or-later.
*
* All the source code of GpgFrontend was modified and released by
* Saturneric <[email protected]> starting on May 12, 2021.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#include "core/thread/FileReadTask.h"
namespace GpgFrontend::UI {
constexpr size_t kBufferSize = 8192;
FileReadTask::FileReadTask(QString path)
: Task("file_read_task"), read_file_path_(std::move(path)) {
HoldOnLifeCycle(true);
connect(this, &FileReadTask::SignalFileBytesReadNext, this,
&FileReadTask::slot_read_bytes);
}
auto FileReadTask::Run() -> int {
if (QFileInfo(read_file_path_).isFile()) {
target_file_.setFileName(read_file_path_);
target_file_.open(QIODevice::ReadOnly);
if (!(target_file_.isOpen() && target_file_.isReadable())) {
qCWarning(core, "file not open or not readable");
if (target_file_.isOpen()) target_file_.close();
return -1;
}
slot_read_bytes();
} else {
emit SignalFileBytesReadEnd();
}
return 0;
}
void FileReadTask::slot_read_bytes() {
QByteArray read_buffer;
if (QByteArray read_buffer;
!target_file_.atEnd() &&
(read_buffer = target_file_.read(kBufferSize)).size() > 0) {
emit SignalFileBytesRead(std::move(read_buffer));
} else {
emit SignalFileBytesReadEnd();
// announce finish task
emit SignalTaskShouldEnd(0);
}
}
FileReadTask::~FileReadTask() {
if (target_file_.isOpen()) target_file_.close();
}
} // namespace GpgFrontend::UI
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