PrismLauncher/launcher/ui/dialogs/ExportInstanceDialog.cpp

// SPDX-License-Identifier: GPL-3.0-only
/*
 *  PolyMC - Minecraft Launcher
 *  Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
 *
 *  This program 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, version 3.
 *
 *  This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 *      Copyright 2013-2021 MultiMC Contributors
 *
 *      Licensed under the Apache License, Version 2.0 (the "License");
 *      you may not use this file except in compliance with the License.
 *      You may obtain a copy of the License at
 *
 *          http://www.apache.org/licenses/LICENSE-2.0
 *
 *      Unless required by applicable law or agreed to in writing, software
 *      distributed under the License is distributed on an "AS IS" BASIS,
 *      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *      See the License for the specific language governing permissions and
 *      limitations under the License.
 */

#include "ExportInstanceDialog.h"
#include "ui_ExportInstanceDialog.h"
#include <BaseInstance.h>
#include <MMCZip.h>
#include <QFileDialog>
#include <QMessageBox>
#include <QFileSystemModel>

#include <QSortFilterProxyModel>
#include <QDebug>
#include <QSaveFile>
#include <QStack>
#include <QFileInfo>
#include "StringUtils.h"
#include "SeparatorPrefixTree.h"
#include "Application.h"
#include <icons/IconList.h>
#include <FileSystem.h>

ExportInstanceDialog::ExportInstanceDialog(InstancePtr instance, QWidget *parent)
    : QDialog(parent), ui(new Ui::ExportInstanceDialog), m_instance(instance)
{
    ui->setupUi(this);
    auto model = new QFileSystemModel(this);
    auto root = instance->instanceRoot();
    proxyModel = new FileIgnoreProxy(root, this);
    loadPackIgnore();
    proxyModel->setSourceModel(model);
    ui->treeView->setModel(proxyModel);
    ui->treeView->setRootIndex(proxyModel->mapFromSource(model->index(root)));
    ui->treeView->sortByColumn(0, Qt::AscendingOrder);

    connect(proxyModel, SIGNAL(rowsInserted(QModelIndex,int,int)), SLOT(rowsInserted(QModelIndex,int,int)));

    model->setFilter(QDir::AllEntries | QDir::NoDotAndDotDot | QDir::AllDirs | QDir::Hidden);
    model->setRootPath(root);
    auto headerView = ui->treeView->header();
    headerView->setSectionResizeMode(QHeaderView::ResizeToContents);
    headerView->setSectionResizeMode(0, QHeaderView::Stretch);
}

ExportInstanceDialog::~ExportInstanceDialog()
{
    delete ui;
}

/// Save icon to instance's folder is needed
void SaveIcon(InstancePtr m_instance)
{
    auto iconKey = m_instance->iconKey();
    auto iconList = APPLICATION->icons();
    auto mmcIcon = iconList->icon(iconKey);
    if(!mmcIcon || mmcIcon->isBuiltIn()) {
        return;
    }
    auto path = mmcIcon->getFilePath();
    if(!path.isNull()) {
        QFileInfo inInfo (path);
        FS::copy(path, FS::PathCombine(m_instance->instanceRoot(), inInfo.fileName())) ();
        return;
    }
    auto & image = mmcIcon->m_images[mmcIcon->type()];
    auto & icon = image.icon;
    auto sizes = icon.availableSizes();
    if(sizes.size() == 0)
    {
        return;
    }
    auto areaOf = [](QSize size)
    {
        return size.width() * size.height();
    };
    QSize largest = sizes[0];
    // find variant with largest area
    for(auto size: sizes)
    {
        if(areaOf(largest) < areaOf(size))
        {
            largest = size;
        }
    }
    auto pixmap = icon.pixmap(largest);
    pixmap.save(FS::PathCombine(m_instance->instanceRoot(), iconKey + ".png"));
}

bool ExportInstanceDialog::doExport()
{
    auto name = FS::RemoveInvalidFilenameChars(m_instance->name());

    const QString output = QFileDialog::getSaveFileName(
        this, tr("Export %1").arg(m_instance->name()),
        FS::PathCombine(QDir::homePath(), name + ".zip"), "Zip (*.zip)", nullptr);
    if (output.isEmpty())
    {
        return false;
    }

    SaveIcon(m_instance);

    auto & blocked = proxyModel->blockedPaths();
    using std::placeholders::_1;
    auto files = QFileInfoList();
    if (!MMCZip::collectFileListRecursively(m_instance->instanceRoot(), nullptr, &files,
                                    std::bind(&SeparatorPrefixTree<'/'>::covers, blocked, _1))) {
        QMessageBox::warning(this, tr("Error"), tr("Unable to export instance"));
        return false;
    }

    if (!MMCZip::compressDirFiles(output, m_instance->instanceRoot(), files, true))
    {
        QMessageBox::warning(this, tr("Error"), tr("Unable to export instance"));
        return false;
    }
    return true;
}

void ExportInstanceDialog::done(int result)
{
    savePackIgnore();
    if (result == QDialog::Accepted)
    {
        if (doExport())
        {
            QDialog::done(QDialog::Accepted);
            return;
        }
        else
        {
            return;
        }
    }
    QDialog::done(result);
}

void ExportInstanceDialog::rowsInserted(QModelIndex parent, int top, int bottom)
{
    //WARNING: possible off-by-one?
    for(int i = top; i < bottom; i++)
    {
        auto node = proxyModel->index(i, 0, parent);
        if(proxyModel->shouldExpand(node))
        {
            auto expNode = node.parent();
            if(!expNode.isValid())
            {
                continue;
            }
            ui->treeView->expand(node);
        }
    }
}

QString ExportInstanceDialog::ignoreFileName()
{
    return FS::PathCombine(m_instance->instanceRoot(), ".packignore");
}

void ExportInstanceDialog::loadPackIgnore()
{
    auto filename = ignoreFileName();
    QFile ignoreFile(filename);
    if(!ignoreFile.open(QIODevice::ReadOnly))
    {
        return;
    }
    auto data = ignoreFile.readAll();
    auto string = QString::fromUtf8(data);
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
    proxyModel->setBlockedPaths(string.split('\n', Qt::SkipEmptyParts));
#else
    proxyModel->setBlockedPaths(string.split('\n', QString::SkipEmptyParts));
#endif
}

void ExportInstanceDialog::savePackIgnore()
{
    auto data = proxyModel->blockedPaths().toStringList().join('\n').toUtf8();
    auto filename = ignoreFileName();
    try
    {
        FS::write(filename, data);
    }
    catch (const Exception &e)
    {
        qWarning() << e.cause();
    }
}