TomZ
108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
/*
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* This file is part of the Flowee project
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* Copyright (C) 2020 Tom Zander <tomz@freedommail.ch>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "DuplicateCommand.h"
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#include <QDir>
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#include <QFileInfo>
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DuplicateCommand::DuplicateCommand()
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{
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}
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QString DuplicateCommand::commandDescription() const
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{
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return "Duplicate\nCreates a duplicate of the database (segment) passed in the argument";
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}
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Flowee::ReturnCodes DuplicateCommand::run()
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{
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Q_ASSERT(!m_target.isEmpty());
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const auto input = highestDataFiles();
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if (input.size() > 1) {
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// then output should be a directory.
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QFileInfo output(m_target);
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if (output.exists() && !output.isDir()) {
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err << "Output should be a directory" << endl;
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return Flowee::InvalidOptions;
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}
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else if (!output.exists()) {
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if (!QDir::current().mkpath(m_target)) {
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err << "Could not write to target: " << m_target << endl;
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return Flowee::CommandFailed;
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}
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}
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}
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for (auto info : highestDataFiles()) {
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out << "Copying " << info.filepath() << endl;
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CheckPoint checkpoint = readInfoFile(info.filepath());
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QFileInfo infoFile(info.filepath());
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const bool ok = QFile::copy(infoFile.absoluteFilePath(), m_target + "/" + infoFile.fileName());
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if (!ok) {
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err << "Failed to copy " << infoFile.absoluteFilePath() << endl;
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return Flowee::CommandFailed;
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}
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const auto db = info.databaseFiles().first();
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QFile in(db.filepath());
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if (!in.open(QIODevice::ReadOnly)) {
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err << "Failed to read from " << db.filepath() << endl;
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return Flowee::CommandFailed;
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}
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QFile out(m_target + "/" + QFileInfo(db.filepath()).fileName());
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if (!out.open(QIODevice::WriteOnly)) {
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err << "Failed to write to " << out.fileName();
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return Flowee::CommandFailed;
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}
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// copy only checkpoint.positionInFile bytes.
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char buf[100000];
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qint64 bytesToCopy = checkpoint.positionInFile;
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while (bytesToCopy > 0) {
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auto read = in.read(buf, std::min<qint64>(bytesToCopy, sizeof(buf)));
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auto written = out.write(buf, read);
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if (written == -1) {
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err << "Failed to write bytes to file: " << out.fileName();
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return Flowee::CommandFailed;
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}
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Q_ASSERT(written == read);
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bytesToCopy -= read;
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}
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in.close();
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out.resize(in.size());
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}
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return Flowee::Ok;
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}
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void DuplicateCommand::addArguments(QCommandLineParser &commandLineParser)
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{
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commandLineParser.addPositionalArgument("target", "Target File or Directory");
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}
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Flowee::ReturnCodes DuplicateCommand::preParseArguments(QStringList &positionalArguments)
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{
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if (positionalArguments.size() < 2)
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return Flowee::InvalidOptions;
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m_target = positionalArguments.takeLast();
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if (m_target == "." || m_target == "..")
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return Flowee::InvalidOptions;
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return Flowee::Ok;
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}
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