pollymc/launcher/minecraft/mod/ModFolderModel.cpp

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// SPDX-License-Identifier: GPL-3.0-only
/*
* PolyMC - Minecraft Launcher
* Copyright (c) 2022 flowln <flowlnlnln@gmail.com>
* 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.
*/
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#include "ModFolderModel.h"
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#include <FileSystem.h>
#include <QDebug>
#include <QFileSystemWatcher>
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#include <QMimeData>
#include <QString>
#include <QThreadPool>
#include <QUrl>
#include <QUuid>
#include <algorithm>
#include "minecraft/mod/tasks/LocalModParseTask.h"
#include "minecraft/mod/tasks/ModFolderLoadTask.h"
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ModFolderModel::ModFolderModel(const QString &dir, bool is_indexed) : QAbstractListModel(), m_dir(dir), m_is_indexed(is_indexed)
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{
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FS::ensureFolderPathExists(m_dir.absolutePath());
m_dir.setFilter(QDir::Readable | QDir::NoDotAndDotDot | QDir::Files | QDir::Dirs);
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m_dir.setSorting(QDir::Name | QDir::IgnoreCase | QDir::LocaleAware);
m_watcher = new QFileSystemWatcher(this);
connect(m_watcher, SIGNAL(directoryChanged(QString)), this, SLOT(directoryChanged(QString)));
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}
void ModFolderModel::startWatching()
{
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if(is_watching)
return;
update();
is_watching = m_watcher->addPath(m_dir.absolutePath());
if (is_watching)
{
qDebug() << "Started watching " << m_dir.absolutePath();
}
else
{
qDebug() << "Failed to start watching " << m_dir.absolutePath();
}
}
void ModFolderModel::stopWatching()
{
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if(!is_watching)
return;
is_watching = !m_watcher->removePath(m_dir.absolutePath());
if (!is_watching)
{
qDebug() << "Stopped watching " << m_dir.absolutePath();
}
else
{
qDebug() << "Failed to stop watching " << m_dir.absolutePath();
}
}
bool ModFolderModel::update()
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{
if (!isValid()) {
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return false;
}
if(m_update) {
scheduled_update = true;
return true;
}
auto index_dir = indexDir();
auto task = new ModFolderLoadTask(dir(), index_dir, m_is_indexed);
m_update = task->result();
QThreadPool *threadPool = QThreadPool::globalInstance();
connect(task, &ModFolderLoadTask::succeeded, this, &ModFolderModel::finishUpdate);
threadPool->start(task);
return true;
}
void ModFolderModel::finishUpdate()
{
QSet<QString> currentSet = modsIndex.keys().toSet();
auto & newMods = m_update->mods;
QSet<QString> newSet = newMods.keys().toSet();
// see if the kept mods changed in some way
{
QSet<QString> kept = currentSet;
kept.intersect(newSet);
for(auto & keptMod: kept) {
auto & newMod = newMods[keptMod];
auto row = modsIndex[keptMod];
auto & currentMod = mods[row];
if(newMod.dateTimeChanged() == currentMod.dateTimeChanged()) {
// no significant change, ignore...
continue;
}
auto & oldMod = mods[row];
if(oldMod.isResolving()) {
activeTickets.remove(oldMod.resolutionTicket());
}
oldMod = newMod;
resolveMod(mods[row]);
emit dataChanged(index(row, 0), index(row, columnCount(QModelIndex()) - 1));
}
}
// remove mods no longer present
{
QSet<QString> removed = currentSet;
QList<int> removedRows;
removed.subtract(newSet);
for(auto & removedMod: removed) {
removedRows.append(modsIndex[removedMod]);
}
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std::sort(removedRows.begin(), removedRows.end(), std::greater<int>());
for(auto iter = removedRows.begin(); iter != removedRows.end(); iter++) {
int removedIndex = *iter;
beginRemoveRows(QModelIndex(), removedIndex, removedIndex);
auto removedIter = mods.begin() + removedIndex;
if(removedIter->isResolving()) {
activeTickets.remove(removedIter->resolutionTicket());
}
mods.erase(removedIter);
endRemoveRows();
}
}
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// add new mods to the end
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{
QSet<QString> added = newSet;
added.subtract(currentSet);
// When you have a Qt build with assertions turned on, proceeding here will abort the application
if (added.size() > 0) {
beginInsertRows(QModelIndex(), mods.size(), mods.size() + added.size() - 1);
for (auto& addedMod : added) {
mods.append(newMods[addedMod]);
resolveMod(mods.last());
}
endInsertRows();
}
}
// update index
{
modsIndex.clear();
int idx = 0;
for(auto & mod: mods) {
modsIndex[mod.internal_id()] = idx;
idx++;
}
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}
m_update.reset();
emit updateFinished();
if(scheduled_update) {
scheduled_update = false;
update();
}
}
void ModFolderModel::resolveMod(Mod& m)
{
if(!m.shouldResolve()) {
return;
}
auto task = new LocalModParseTask(nextResolutionTicket, m.type(), m.fileinfo());
auto result = task->result();
result->id = m.internal_id();
activeTickets.insert(nextResolutionTicket, result);
m.setResolving(true, nextResolutionTicket);
nextResolutionTicket++;
QThreadPool *threadPool = QThreadPool::globalInstance();
connect(task, &LocalModParseTask::finished, this, &ModFolderModel::finishModParse);
threadPool->start(task);
}
void ModFolderModel::finishModParse(int token)
{
auto iter = activeTickets.find(token);
if(iter == activeTickets.end()) {
return;
}
auto result = *iter;
activeTickets.remove(token);
int row = modsIndex[result->id];
auto & mod = mods[row];
mod.finishResolvingWithDetails(result->details);
emit dataChanged(index(row), index(row, columnCount(QModelIndex()) - 1));
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}
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void ModFolderModel::disableInteraction(bool disabled)
{
if (interaction_disabled == disabled) {
return;
}
interaction_disabled = disabled;
if(size()) {
emit dataChanged(index(0), index(size() - 1));
}
}
void ModFolderModel::directoryChanged(QString path)
{
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update();
}
bool ModFolderModel::isValid()
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{
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return m_dir.exists() && m_dir.isReadable();
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}
// FIXME: this does not take disabled mod (with extra .disable extension) into account...
bool ModFolderModel::installMod(const QString &filename)
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{
if(interaction_disabled) {
return false;
}
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// NOTE: fix for GH-1178: remove trailing slash to avoid issues with using the empty result of QFileInfo::fileName
auto originalPath = FS::NormalizePath(filename);
QFileInfo fileinfo(originalPath);
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if (!fileinfo.exists() || !fileinfo.isReadable())
{
qWarning() << "Caught attempt to install non-existing file or file-like object:" << originalPath;
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return false;
}
qDebug() << "installing: " << fileinfo.absoluteFilePath();
Mod installedMod(fileinfo);
if (!installedMod.valid())
{
qDebug() << originalPath << "is not a valid mod. Ignoring it.";
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return false;
}
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auto type = installedMod.type();
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if (type == Mod::MOD_UNKNOWN)
{
qDebug() << "Cannot recognize mod type of" << originalPath << ", ignoring it.";
return false;
}
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auto newpath = FS::NormalizePath(FS::PathCombine(m_dir.path(), fileinfo.fileName()));
if(originalPath == newpath)
{
qDebug() << "Overwriting the mod (" << originalPath << ") with itself makes no sense...";
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return false;
}
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if (type == Mod::MOD_SINGLEFILE || type == Mod::MOD_ZIPFILE || type == Mod::MOD_LITEMOD)
{
if(QFile::exists(newpath) || QFile::exists(newpath + QString(".disabled")))
{
if(!QFile::remove(newpath))
{
// FIXME: report error in a user-visible way
qWarning() << "Copy from" << originalPath << "to" << newpath << "has failed.";
return false;
}
qDebug() << newpath << "has been deleted.";
}
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if (!QFile::copy(fileinfo.filePath(), newpath))
{
qWarning() << "Copy from" << originalPath << "to" << newpath << "has failed.";
// FIXME: report error in a user-visible way
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return false;
}
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FS::updateTimestamp(newpath);
installedMod.repath(newpath);
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update();
return true;
}
else if (type == Mod::MOD_FOLDER)
{
QString from = fileinfo.filePath();
if(QFile::exists(newpath))
{
qDebug() << "Ignoring folder " << from << ", it would merge with " << newpath;
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return false;
}
if (!FS::copy(from, newpath)())
{
qWarning() << "Copy of folder from" << originalPath << "to" << newpath << "has (potentially partially) failed.";
return false;
}
installedMod.repath(newpath);
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update();
return true;
}
return false;
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}
bool ModFolderModel::setModStatus(const QModelIndexList& indexes, ModStatusAction enable)
{
if(interaction_disabled) {
return false;
}
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if(indexes.isEmpty())
return true;
for (auto index: indexes)
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{
if(index.column() != 0) {
continue;
}
setModStatus(index.row(), enable);
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}
return true;
}
bool ModFolderModel::deleteMods(const QModelIndexList& indexes)
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{
if(interaction_disabled) {
return false;
}
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if(indexes.isEmpty())
return true;
for (auto i: indexes)
{
if(i.column() != 0) {
continue;
}
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Mod &m = mods[i.row()];
auto index_dir = indexDir();
m.destroy(index_dir);
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}
return true;
}
int ModFolderModel::columnCount(const QModelIndex &parent) const
{
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return NUM_COLUMNS;
}
QVariant ModFolderModel::data(const QModelIndex &index, int role) const
{
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if (!index.isValid())
return QVariant();
int row = index.row();
int column = index.column();
if (row < 0 || row >= mods.size())
return QVariant();
switch (role)
{
case Qt::DisplayRole:
switch (column)
{
case NameColumn:
return mods[row].name();
case VersionColumn: {
switch(mods[row].type()) {
case Mod::MOD_FOLDER:
return tr("Folder");
case Mod::MOD_SINGLEFILE:
return tr("File");
default:
break;
}
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return mods[row].version();
}
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case DateColumn:
return mods[row].dateTimeChanged();
default:
return QVariant();
}
case Qt::ToolTipRole:
return mods[row].internal_id();
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case Qt::CheckStateRole:
switch (column)
{
case ActiveColumn:
return mods[row].enabled() ? Qt::Checked : Qt::Unchecked;
default:
return QVariant();
}
default:
return QVariant();
}
}
bool ModFolderModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
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if (index.row() < 0 || index.row() >= rowCount(index) || !index.isValid())
{
return false;
}
if (role == Qt::CheckStateRole)
{
return setModStatus(index.row(), Toggle);
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}
return false;
}
bool ModFolderModel::setModStatus(int row, ModFolderModel::ModStatusAction action)
{
if(row < 0 || row >= mods.size()) {
return false;
}
auto &mod = mods[row];
bool desiredStatus;
switch(action) {
case Enable:
desiredStatus = true;
break;
case Disable:
desiredStatus = false;
break;
case Toggle:
default:
desiredStatus = !mod.enabled();
break;
}
if(desiredStatus == mod.enabled()) {
return true;
}
// preserve the row, but change its ID
auto oldId = mod.internal_id();
if(!mod.enable(!mod.enabled())) {
return false;
}
auto newId = mod.internal_id();
if(modsIndex.contains(newId)) {
// NOTE: this could handle a corner case, where we are overwriting a file, because the same 'mod' exists both enabled and disabled
// But is it necessary?
}
modsIndex.remove(oldId);
modsIndex[newId] = row;
emit dataChanged(index(row, 0), index(row, columnCount(QModelIndex()) - 1));
return true;
}
QVariant ModFolderModel::headerData(int section, Qt::Orientation orientation, int role) const
{
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switch (role)
{
case Qt::DisplayRole:
switch (section)
{
case ActiveColumn:
return QString();
case NameColumn:
return tr("Name");
case VersionColumn:
return tr("Version");
case DateColumn:
return tr("Last changed");
default:
return QVariant();
}
case Qt::ToolTipRole:
switch (section)
{
case ActiveColumn:
return tr("Is the mod enabled?");
case NameColumn:
return tr("The name of the mod.");
case VersionColumn:
return tr("The version of the mod.");
case DateColumn:
return tr("The date and time this mod was last changed (or added).");
default:
return QVariant();
}
default:
return QVariant();
}
return QVariant();
}
Qt::ItemFlags ModFolderModel::flags(const QModelIndex &index) const
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{
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Qt::ItemFlags defaultFlags = QAbstractListModel::flags(index);
auto flags = defaultFlags;
if(interaction_disabled) {
flags &= ~Qt::ItemIsDropEnabled;
}
else
{
flags |= Qt::ItemIsDropEnabled;
if(index.isValid()) {
flags |= Qt::ItemIsUserCheckable;
}
}
return flags;
}
Qt::DropActions ModFolderModel::supportedDropActions() const
{
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// copy from outside, move from within and other mod lists
return Qt::CopyAction | Qt::MoveAction;
}
QStringList ModFolderModel::mimeTypes() const
{
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QStringList types;
types << "text/uri-list";
return types;
}
bool ModFolderModel::dropMimeData(const QMimeData* data, Qt::DropAction action, int, int, const QModelIndex&)
{
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if (action == Qt::IgnoreAction)
{
return true;
}
// check if the action is supported
if (!data || !(action & supportedDropActions()))
{
return false;
}
// files dropped from outside?
if (data->hasUrls())
{
auto urls = data->urls();
for (auto url : urls)
{
// only local files may be dropped...
if (!url.isLocalFile())
{
continue;
}
// TODO: implement not only copy, but also move
// FIXME: handle errors here
installMod(url.toLocalFile());
}
return true;
}
return false;
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}