pollymc/launcher/minecraft/mod/ResourceFolderModel.cpp

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#include "ResourceFolderModel.h"
#include <QCoreApplication>
#include <QDebug>
#include <QMimeData>
#include <QThreadPool>
#include <QUrl>
#include "FileSystem.h"
#include "minecraft/mod/tasks/BasicFolderLoadTask.h"
#include "tasks/Task.h"
ResourceFolderModel::ResourceFolderModel(QDir dir, QObject* parent) : QAbstractListModel(parent), m_dir(dir), m_watcher(this)
{
m_dir.setFilter(QDir::Readable | QDir::NoDotAndDotDot | QDir::Files | QDir::Dirs);
m_dir.setSorting(QDir::Name | QDir::IgnoreCase | QDir::LocaleAware);
connect(&m_watcher, &QFileSystemWatcher::directoryChanged, this, &ResourceFolderModel::directoryChanged);
}
ResourceFolderModel::~ResourceFolderModel()
{
while (!QThreadPool::globalInstance()->waitForDone(100))
QCoreApplication::processEvents();
}
bool ResourceFolderModel::startWatching(const QStringList paths)
{
if (m_is_watching)
return false;
auto couldnt_be_watched = m_watcher.addPaths(paths);
for (auto path : paths) {
if (couldnt_be_watched.contains(path))
qDebug() << "Failed to start watching " << path;
else
qDebug() << "Started watching " << path;
}
update();
m_is_watching = !m_is_watching;
return m_is_watching;
}
bool ResourceFolderModel::stopWatching(const QStringList paths)
{
if (!m_is_watching)
return false;
auto couldnt_be_stopped = m_watcher.removePaths(paths);
for (auto path : paths) {
if (couldnt_be_stopped.contains(path))
qDebug() << "Failed to stop watching " << path;
else
qDebug() << "Stopped watching " << path;
}
m_is_watching = !m_is_watching;
return !m_is_watching;
}
bool ResourceFolderModel::installResource(QString original_path)
{
if (!m_can_interact) {
return false;
}
// NOTE: fix for GH-1178: remove trailing slash to avoid issues with using the empty result of QFileInfo::fileName
original_path = FS::NormalizePath(original_path);
QFileInfo file_info(original_path);
if (!file_info.exists() || !file_info.isReadable()) {
qWarning() << "Caught attempt to install non-existing file or file-like object:" << original_path;
return false;
}
qDebug() << "Installing: " << file_info.absoluteFilePath();
Resource resource(file_info);
if (!resource.valid()) {
qWarning() << original_path << "is not a valid resource. Ignoring it.";
return false;
}
auto new_path = FS::NormalizePath(m_dir.filePath(file_info.fileName()));
if (original_path == new_path) {
qWarning() << "Overwriting the mod (" << original_path << ") with itself makes no sense...";
return false;
}
switch (resource.type()) {
case ResourceType::SINGLEFILE:
case ResourceType::ZIPFILE:
case ResourceType::LITEMOD: {
if (QFile::exists(new_path) || QFile::exists(new_path + QString(".disabled"))) {
if (!QFile::remove(new_path)) {
qCritical() << "Cleaning up new location (" << new_path << ") was unsuccessful!";
return false;
}
qDebug() << new_path << "has been deleted.";
}
if (!QFile::copy(original_path, new_path)) {
qCritical() << "Copy from" << original_path << "to" << new_path << "has failed.";
return false;
}
FS::updateTimestamp(new_path);
QFileInfo new_path_file_info(new_path);
resource.setFile(new_path_file_info);
if (!m_is_watching)
return update();
return true;
}
case ResourceType::FOLDER: {
if (QFile::exists(new_path)) {
qDebug() << "Ignoring folder '" << original_path << "', it would merge with" << new_path;
return false;
}
if (!FS::copy(original_path, new_path)()) {
qWarning() << "Copy of folder from" << original_path << "to" << new_path << "has (potentially partially) failed.";
return false;
}
QFileInfo newpathInfo(new_path);
resource.setFile(newpathInfo);
if (!m_is_watching)
return update();
return true;
}
default:
break;
}
return false;
}
bool ResourceFolderModel::uninstallResource(QString file_name)
{
for (auto& resource : m_resources) {
if (resource->fileinfo().fileName() == file_name) {
auto res = resource->destroy();
update();
return res;
}
}
return false;
}
bool ResourceFolderModel::deleteResources(const QModelIndexList& indexes)
{
if (!m_can_interact)
return false;
if (indexes.isEmpty())
return true;
for (auto i : indexes) {
if (i.column() != 0) {
continue;
}
auto& resource = m_resources.at(i.row());
resource->destroy();
}
update();
return true;
}
bool ResourceFolderModel::setResourceEnabled(const QModelIndexList &indexes, EnableAction action)
{
if (!m_can_interact)
return false;
if (indexes.isEmpty())
return true;
bool succeeded = true;
for (auto const& idx : indexes) {
if (!validateIndex(idx) || idx.column() != 0)
continue;
int row = idx.row();
auto& resource = m_resources[row];
// Preserve the row, but change its ID
auto old_id = resource->internal_id();
if (!resource->enable(action)) {
succeeded = false;
continue;
}
auto new_id = resource->internal_id();
if (m_resources_index.contains(new_id)) {
// FIXME: https://github.com/PolyMC/PolyMC/issues/550
}
m_resources_index.remove(old_id);
m_resources_index[new_id] = row;
emit dataChanged(index(row, 0), index(row, columnCount(QModelIndex()) - 1));
}
return succeeded;
}
static QMutex s_update_task_mutex;
bool ResourceFolderModel::update()
{
// We hold a lock here to prevent race conditions on the m_current_update_task reset.
QMutexLocker lock(&s_update_task_mutex);
// Already updating, so we schedule a future update and return.
if (m_current_update_task) {
m_scheduled_update = true;
return false;
}
m_current_update_task.reset(createUpdateTask());
if (!m_current_update_task)
return false;
connect(m_current_update_task.get(), &Task::succeeded, this, &ResourceFolderModel::onUpdateSucceeded,
Qt::ConnectionType::QueuedConnection);
connect(m_current_update_task.get(), &Task::failed, this, &ResourceFolderModel::onUpdateFailed, Qt::ConnectionType::QueuedConnection);
connect(m_current_update_task.get(), &Task::finished, this, [=] {
m_current_update_task.reset();
if (m_scheduled_update) {
m_scheduled_update = false;
update();
} else {
emit updateFinished();
}
}, Qt::ConnectionType::QueuedConnection);
QThreadPool::globalInstance()->start(m_current_update_task.get());
return true;
}
void ResourceFolderModel::resolveResource(Resource::Ptr res)
{
if (!res->shouldResolve()) {
return;
}
auto task = createParseTask(*res);
if (!task)
return;
int ticket = m_next_resolution_ticket.fetch_add(1);
res->setResolving(true, ticket);
m_active_parse_tasks.insert(ticket, task);
connect(
task, &Task::succeeded, this, [=] { onParseSucceeded(ticket, res->internal_id()); }, Qt::ConnectionType::QueuedConnection);
connect(
task, &Task::failed, this, [=] { onParseFailed(ticket, res->internal_id()); }, Qt::ConnectionType::QueuedConnection);
connect(
task, &Task::finished, this, [=] { m_active_parse_tasks.remove(ticket); }, Qt::ConnectionType::QueuedConnection);
QThreadPool::globalInstance()->start(task);
}
void ResourceFolderModel::onUpdateSucceeded()
{
auto update_results = static_cast<BasicFolderLoadTask*>(m_current_update_task.get())->result();
auto& new_resources = update_results->resources;
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
auto current_list = m_resources_index.keys();
QSet<QString> current_set(current_list.begin(), current_list.end());
auto new_list = new_resources.keys();
QSet<QString> new_set(new_list.begin(), new_list.end());
#else
QSet<QString> current_set(m_resources_index.keys().toSet());
QSet<QString> new_set(new_resources.keys().toSet());
#endif
applyUpdates(current_set, new_set, new_resources);
}
void ResourceFolderModel::onParseSucceeded(int ticket, QString resource_id)
{
auto iter = m_active_parse_tasks.constFind(ticket);
if (iter == m_active_parse_tasks.constEnd())
return;
int row = m_resources_index[resource_id];
emit dataChanged(index(row), index(row, columnCount(QModelIndex()) - 1));
}
Task* ResourceFolderModel::createUpdateTask()
{
return new BasicFolderLoadTask(m_dir);
}
bool ResourceFolderModel::hasPendingParseTasks() const
{
return !m_active_parse_tasks.isEmpty();
}
void ResourceFolderModel::directoryChanged(QString path)
{
update();
}
Qt::DropActions ResourceFolderModel::supportedDropActions() const
{
// copy from outside, move from within and other resource lists
return Qt::CopyAction | Qt::MoveAction;
}
Qt::ItemFlags ResourceFolderModel::flags(const QModelIndex& index) const
{
Qt::ItemFlags defaultFlags = QAbstractListModel::flags(index);
auto flags = defaultFlags;
if (!m_can_interact) {
flags &= ~Qt::ItemIsDropEnabled;
} else {
flags |= Qt::ItemIsDropEnabled;
if (index.isValid()) {
flags |= Qt::ItemIsUserCheckable;
}
}
return flags;
}
QStringList ResourceFolderModel::mimeTypes() const
{
QStringList types;
types << "text/uri-list";
return types;
}
bool ResourceFolderModel::dropMimeData(const QMimeData* data, Qt::DropAction action, int, int, const QModelIndex&)
{
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
installResource(url.toLocalFile());
}
return true;
}
return false;
}
bool ResourceFolderModel::validateIndex(const QModelIndex& index) const
{
if (!index.isValid())
return false;
int row = index.row();
if (row < 0 || row >= m_resources.size())
return false;
return true;
}
QVariant ResourceFolderModel::data(const QModelIndex& index, int role) const
{
if (!validateIndex(index))
return {};
int row = index.row();
int column = index.column();
switch (role) {
case Qt::DisplayRole:
switch (column) {
case NAME_COLUMN:
return m_resources[row]->name();
case DATE_COLUMN:
return m_resources[row]->dateTimeChanged();
default:
return {};
}
case Qt::ToolTipRole:
return m_resources[row]->internal_id();
case Qt::CheckStateRole:
switch (column) {
case ACTIVE_COLUMN:
return m_resources[row]->enabled() ? Qt::Checked : Qt::Unchecked;
default:
return {};
}
default:
return {};
}
}
bool ResourceFolderModel::setData(const QModelIndex& index, const QVariant& value, int role)
{
int row = index.row();
if (row < 0 || row >= rowCount(index) || !index.isValid())
return false;
if (role == Qt::CheckStateRole)
return setResourceEnabled({ index }, EnableAction::TOGGLE);
return false;
}
QVariant ResourceFolderModel::headerData(int section, Qt::Orientation orientation, int role) const
{
switch (role) {
case Qt::DisplayRole:
switch (section) {
case NAME_COLUMN:
return tr("Name");
case DATE_COLUMN:
return tr("Last modified");
default:
return {};
}
case Qt::ToolTipRole: {
switch (section) {
case ACTIVE_COLUMN:
//: Here, resource is a generic term for external resources, like Mods, Resource Packs, Shader Packs, etc.
return tr("Is the resource enabled?");
case NAME_COLUMN:
//: Here, resource is a generic term for external resources, like Mods, Resource Packs, Shader Packs, etc.
return tr("The name of the resource.");
case DATE_COLUMN:
//: Here, resource is a generic term for external resources, like Mods, Resource Packs, Shader Packs, etc.
return tr("The date and time this resource was last changed (or added).");
default:
return {};
}
}
default:
break;
}
return {};
}
QSortFilterProxyModel* ResourceFolderModel::createFilterProxyModel(QObject* parent)
{
return new ProxyModel(parent);
}
SortType ResourceFolderModel::columnToSortKey(size_t column) const
{
Q_ASSERT(m_column_sort_keys.size() == columnCount());
return m_column_sort_keys.at(column);
}
void ResourceFolderModel::enableInteraction(bool enabled)
{
if (m_can_interact == enabled)
return;
m_can_interact = enabled;
if (size())
emit dataChanged(index(0), index(size() - 1));
}
/* Standard Proxy Model for createFilterProxyModel */
[[nodiscard]] bool ResourceFolderModel::ProxyModel::filterAcceptsRow(int source_row, const QModelIndex& source_parent) const
{
auto* model = qobject_cast<ResourceFolderModel*>(sourceModel());
if (!model)
return true;
const auto& resource = model->at(source_row);
return resource.applyFilter(filterRegularExpression());
}
[[nodiscard]] bool ResourceFolderModel::ProxyModel::lessThan(const QModelIndex& source_left, const QModelIndex& source_right) const
{
auto* model = qobject_cast<ResourceFolderModel*>(sourceModel());
if (!model || !source_left.isValid() || !source_right.isValid() || source_left.column() != source_right.column()) {
return QSortFilterProxyModel::lessThan(source_left, source_right);
}
// we are now guaranteed to have two valid indexes in the same column... we love the provided invariants unconditionally and
// proceed.
auto column_sort_key = model->columnToSortKey(source_left.column());
auto const& resource_left = model->at(source_left.row());
auto const& resource_right = model->at(source_right.row());
auto compare_result = resource_left.compare(resource_right, column_sort_key);
if (compare_result.first == 0)
return QSortFilterProxyModel::lessThan(source_left, source_right);
if (compare_result.second || sortOrder() != Qt::DescendingOrder)
return (compare_result.first < 0);
return (compare_result.first > 0);
}