pollymc/application/pages/instance/ServersPage.cpp

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#include "ServersPage.h"
#include "ui_ServersPage.h"
#include <FileSystem.h>
#include <sstream>
#include <io/stream_reader.h>
#include <tag_string.h>
#include <tag_primitive.h>
#include <tag_list.h>
#include <tag_compound.h>
#include <minecraft/MinecraftInstance.h>
#include <QFileSystemWatcher>
static const int COLUMN_COUNT = 2; // 3 , TBD: latency and other nice things.
struct Server
{
// Types
enum class AcceptsTextures : int
{
ASK = 0,
ALWAYS = 1,
NEVER = 2
};
// Methods
Server()
{
m_name = QObject::tr("Minecraft Server");
}
Server(const QString & name, const QString & address)
{
m_name = name;
m_address = address;
}
Server(nbt::tag_compound& server)
{
std::string addressStr(server["ip"]);
m_address = QString::fromUtf8(addressStr.c_str());
std::string nameStr(server["name"]);
m_name = QString::fromUtf8(nameStr.c_str());
if(server["icon"])
{
std::string base64str(server["icon"]);
m_icon = QByteArray::fromBase64(base64str.c_str());
}
if(server.has_key("acceptTextures", nbt::tag_type::Byte))
{
bool value = server["acceptTextures"].as<nbt::tag_byte>().get();
if(value)
{
m_acceptsTextures = AcceptsTextures::ALWAYS;
}
else
{
m_acceptsTextures = AcceptsTextures::NEVER;
}
}
}
void serialize(nbt::tag_compound& server)
{
server.insert("name", m_name.toUtf8().toStdString());
server.insert("ip", m_address.toUtf8().toStdString());
if(m_icon.size())
{
server.insert("icon", m_icon.toBase64().toStdString());
}
if(m_acceptsTextures != AcceptsTextures::ASK)
{
server.insert("acceptTextures", nbt::tag_byte(m_acceptsTextures == AcceptsTextures::ALWAYS));
}
}
// Data - persistent and user changeable
QString m_name;
QString m_address;
AcceptsTextures m_acceptsTextures = AcceptsTextures::ASK;
// Data - persistent and automatically updated
QByteArray m_icon;
// Data - temporary
bool m_checked = false;
bool m_up = false;
QString m_motd; // https://mctools.org/motd-creator
int m_ping = 0;
int m_currentPlayers = 0;
int m_maxPlayers = 0;
};
static std::unique_ptr <nbt::tag_compound> parseServersDat(const QString& filename)
{
try
{
QByteArray input = FS::read(filename);
std::istringstream foo(std::string(input.constData(), input.size()));
auto pair = nbt::io::read_compound(foo);
if(pair.first != "")
return nullptr;
if(pair.second == nullptr)
return nullptr;
return std::move(pair.second);
}
catch (...)
{
return nullptr;
}
}
static bool serializeServerDat(const QString& filename, nbt::tag_compound * levelInfo)
{
try
{
std::ostringstream s;
nbt::io::write_tag("", *levelInfo, s);
QByteArray val(s.str().data(), (int) s.str().size() );
FS::write(filename, val);
return true;
}
catch (...)
{
return false;
}
}
class ServersModel: public QAbstractListModel
{
Q_OBJECT
public:
enum Roles
{
ServerPtrRole = Qt::UserRole,
};
explicit ServersModel(const QString &path, QObject *parent = 0)
: QAbstractListModel(parent)
{
m_path = path;
m_watcher = new QFileSystemWatcher(this);
connect(m_watcher, &QFileSystemWatcher::fileChanged, this, &ServersModel::fileChanged);
connect(m_watcher, &QFileSystemWatcher::directoryChanged, this, &ServersModel::dirChanged);
m_saveTimer.setSingleShot(true);
m_saveTimer.setInterval(5000);
connect(&m_saveTimer, &QTimer::timeout, this, &ServersModel::save_internal);
}
virtual ~ServersModel() {};
void observe()
{
if(m_observed)
{
return;
}
m_observed = true;
if(!m_loaded)
{
load();
}
updateFSObserver();
}
void unobserve()
{
if(!m_observed)
{
return;
}
m_observed = false;
updateFSObserver();
}
void lock()
{
if(m_locked)
{
return;
}
saveNow();
m_locked = true;
updateFSObserver();
}
void unlock()
{
if(!m_locked)
{
return;
}
m_locked = false;
updateFSObserver();
}
int addEmptyRow(int position)
{
if(m_locked)
{
return -1;
}
if(position < 0 || position >= rowCount())
{
position = rowCount();
}
beginInsertRows(QModelIndex(), position, position);
m_servers.insert(position, Server());
endInsertRows();
scheduleSave();
return position;
}
bool removeRow(int row)
{
if(m_locked)
{
return false;
}
if(row < 0 || row >= rowCount())
{
return false;
}
beginRemoveRows(QModelIndex(), row, row);
m_servers.removeAt(row);
endRemoveRows(); // does absolutely nothing, the selected server stays as the next line...
scheduleSave();
return true;
}
bool moveUp(int row)
{
if(m_locked)
{
return false;
}
if(row <= 0)
{
return false;
}
beginMoveRows(QModelIndex(), row, row, QModelIndex(), row - 1);
m_servers.swap(row-1, row);
endMoveRows();
scheduleSave();
return true;
}
bool moveDown(int row)
{
if(m_locked)
{
return false;
}
int count = rowCount();
if(row + 1 >= count)
{
return false;
}
beginMoveRows(QModelIndex(), row, row, QModelIndex(), row + 2);
m_servers.swap(row+1, row);
endMoveRows();
scheduleSave();
return true;
}
QVariant headerData(int section, Qt::Orientation orientation, int role) const override
{
if (section < 0 || section >= COLUMN_COUNT)
return QVariant();
if(role == Qt::DisplayRole)
{
switch(section)
{
case 0:
return tr("Name");
case 1:
return tr("Address");
case 2:
return tr("Latency");
}
}
return QAbstractListModel::headerData(section, orientation, role);
}
virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override
{
if (!index.isValid())
return QVariant();
int row = index.row();
int column = index.column();
if(column < 0 || column >= COLUMN_COUNT)
return QVariant();
if (row < 0 || row >= m_servers.size())
return QVariant();
switch(column)
{
case 0:
switch (role)
{
case Qt::DecorationRole:
{
auto & bytes = m_servers[row].m_icon;
if(bytes.size())
{
QPixmap px;
if(px.loadFromData(bytes))
return QIcon(px);
}
return MMC->getThemedIcon("unknown_server");
}
case Qt::DisplayRole:
return m_servers[row].m_name;
case ServerPtrRole:
return QVariant::fromValue<void *>((void *)&m_servers[row]);
default:
return QVariant();
}
case 1:
switch (role)
{
case Qt::DisplayRole:
return m_servers[row].m_address;
default:
return QVariant();
}
case 2:
switch (role)
{
case Qt::DisplayRole:
return m_servers[row].m_ping;
default:
return QVariant();
}
default:
return QVariant();
}
}
virtual int rowCount(const QModelIndex &parent = QModelIndex()) const override
{
return m_servers.size();
}
int columnCount(const QModelIndex & parent) const override
{
return COLUMN_COUNT;
}
Server * at(int index)
{
if(index < 0 || index >= rowCount())
{
return nullptr;
}
return &m_servers[index];
}
void setName(int row, const QString & name)
{
if(m_locked)
{
return;
}
auto server = at(row);
if(!server || server->m_name == name)
{
return;
}
server->m_name = name;
emit dataChanged(index(row, 0), index(row, COLUMN_COUNT - 1));
scheduleSave();
}
void setAddress(int row, const QString & address)
{
if(m_locked)
{
return;
}
auto server = at(row);
if(!server || server->m_address == address)
{
return;
}
server->m_address = address;
emit dataChanged(index(row, 0), index(row, COLUMN_COUNT - 1));
scheduleSave();
}
void setAcceptsTextures(int row, Server::AcceptsTextures textures)
{
if(m_locked)
{
return;
}
auto server = at(row);
if(!server || server->m_acceptsTextures == textures)
{
return;
}
server->m_acceptsTextures = textures;
emit dataChanged(index(row, 0), index(row, COLUMN_COUNT - 1));
scheduleSave();
}
void load()
{
cancelSave();
beginResetModel();
QList<Server> servers;
auto serversDat = parseServersDat(serversPath());
if(serversDat)
{
auto &serversList = serversDat->at("servers").as<nbt::tag_list>();
for(auto iter = serversList.begin(); iter != serversList.end(); iter++)
{
auto & serverTag = (*iter).as<nbt::tag_compound>();
Server s(serverTag);
servers.append(s);
}
}
m_servers.swap(servers);
m_loaded = true;
endResetModel();
}
void saveNow()
{
if(saveIsScheduled())
{
save_internal();
}
}
public slots:
void dirChanged(const QString& path)
{
qDebug() << "Changed:" << path;
load();
}
void fileChanged(const QString& path)
{
qDebug() << "Changed:" << path;
}
private slots:
void save_internal()
{
cancelSave();
qDebug() << "Server list save is performed for" << m_path;
nbt::tag_compound out;
nbt::tag_list list;
for(auto & server: m_servers)
{
nbt::tag_compound serverNbt;
server.serialize(serverNbt);
list.push_back(std::move(serverNbt));
}
out.insert("servers", nbt::value(std::move(list)));
if(!serializeServerDat(serversPath(), &out))
{
qDebug() << "Failed to save server list:" << m_path << "Will try again.";
scheduleSave();
}
}
private:
void scheduleSave()
{
if(!m_loaded)
{
qDebug() << "Server list should never save if it didn't successfully load, path:" << m_path;
return;
}
if(!m_dirty)
{
m_dirty = true;
qDebug() << "Server list save is scheduled for" << m_path;
}
m_saveTimer.start();
}
void cancelSave()
{
m_dirty = false;
m_saveTimer.stop();
}
bool saveIsScheduled() const
{
return m_dirty;
}
void updateFSObserver()
{
bool observingFS = m_watcher->directories().contains(m_path);
if(m_observed && m_locked)
{
if(!observingFS)
{
qWarning() << "Will watch" << m_path;
if(!m_watcher->addPath(m_path))
{
qWarning() << "Failed to start watching" << m_path;
}
}
}
else
{
if(observingFS)
{
qWarning() << "Will stop watching" << m_path;
if(!m_watcher->removePath(m_path))
{
qWarning() << "Failed to stop watching" << m_path;
}
}
}
}
QString serversPath()
{
QFileInfo foo(FS::PathCombine(m_path, "servers.dat"));
return foo.canonicalFilePath();
}
private:
bool m_loaded = false;
bool m_locked = false;
bool m_observed = false;
bool m_dirty = false;
QString m_path;
QList<Server> m_servers;
QFileSystemWatcher *m_watcher = nullptr;
QTimer m_saveTimer;
};
ServersPage::ServersPage(MinecraftInstance * inst, QWidget* parent)
: QWidget(parent), ui(new Ui::ServersPage)
{
ui->setupUi(this);
ui->tabWidget->tabBar()->hide();
m_inst = inst;
m_model = new ServersModel(inst->minecraftRoot(), this);
ui->serversView->setIconSize(QSize(64,64));
ui->serversView->setModel(m_model);
auto head = ui->serversView->header();
if(head->count())
{
head->setSectionResizeMode(0, QHeaderView::Stretch);
for(int i = 1; i < head->count(); i++)
{
head->setSectionResizeMode(i, QHeaderView::ResizeToContents);
}
}
auto selectionModel = ui->serversView->selectionModel();
connect(selectionModel, &QItemSelectionModel::currentChanged, this, &ServersPage::currentChanged);
connect(m_inst, &MinecraftInstance::runningStatusChanged, this, &ServersPage::on_RunningState_changed);
connect(ui->nameLine, &QLineEdit::textEdited, this, &ServersPage::nameEdited);
connect(ui->addressLine, &QLineEdit::textEdited, this, &ServersPage::addressEdited);
connect(ui->resourceComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(resourceIndexChanged(int)));
connect(m_model, &QAbstractItemModel::rowsRemoved, this, &ServersPage::rowsRemoved);
m_locked = m_inst->isRunning();
if(m_locked)
{
m_model->lock();
}
updateState();
}
ServersPage::~ServersPage()
{
m_model->saveNow();
}
void ServersPage::on_RunningState_changed(bool running)
{
if(m_locked == running)
{
return;
}
m_locked = running;
if(m_locked)
{
m_model->lock();
}
else
{
m_model->unlock();
}
updateState();
}
void ServersPage::currentChanged(const QModelIndex &current, const QModelIndex &previous)
{
int nextServer = -1;
if (!current.isValid())
{
nextServer = -1;
}
else
{
nextServer = current.row();
}
currentServer = nextServer;
updateState();
}
// WARNING: this is here because currentChanged is not accurate when removing rows. the current item needs to be fixed up after removal.
void ServersPage::rowsRemoved(const QModelIndex& parent, int first, int last)
{
if(currentServer < first)
{
// current was before the removal
return;
}
else if(currentServer >= first && currentServer <= last)
{
// current got removed...
return;
}
else
{
// current was past the removal
int count = last - first + 1;
currentServer -= count;
}
}
void ServersPage::nameEdited(const QString& name)
{
m_model->setName(currentServer, name);
}
void ServersPage::addressEdited(const QString& address)
{
m_model->setAddress(currentServer, address);
}
void ServersPage::resourceIndexChanged(int index)
{
auto acceptsTextures = Server::AcceptsTextures(index);
m_model->setAcceptsTextures(currentServer, acceptsTextures);
}
void ServersPage::updateState()
{
auto server = m_model->at(currentServer);
bool serverEditEnabled = server && !m_locked;
ui->addressLine->setEnabled(serverEditEnabled);
ui->nameLine->setEnabled(serverEditEnabled);
ui->resourceComboBox->setEnabled(serverEditEnabled);
ui->moveDownBtn->setEnabled(serverEditEnabled);
ui->moveUpBtn->setEnabled(serverEditEnabled);
ui->removeBtn->setEnabled(serverEditEnabled);
if(server)
{
ui->addressLine->setText(server->m_address);
ui->nameLine->setText(server->m_name);
ui->resourceComboBox->setCurrentIndex(int(server->m_acceptsTextures));
}
else
{
ui->addressLine->setText(QString());
ui->nameLine->setText(QString());
ui->resourceComboBox->setCurrentIndex(0);
}
ui->addBtn->setDisabled(m_locked);
}
void ServersPage::openedImpl()
{
m_model->observe();
}
void ServersPage::closedImpl()
{
m_model->unobserve();
}
void ServersPage::on_addBtn_clicked()
{
int position = m_model->addEmptyRow(currentServer + 1);
if(position < 0)
{
return;
}
// select the new row
ui->serversView->selectionModel()->setCurrentIndex(
m_model->index(position),
QItemSelectionModel::SelectCurrent | QItemSelectionModel::Clear | QItemSelectionModel::Rows
);
currentServer = position;
}
void ServersPage::on_removeBtn_clicked()
{
m_model->removeRow(currentServer);
}
void ServersPage::on_moveUpBtn_clicked()
{
if(m_model->moveUp(currentServer))
{
currentServer --;
}
}
void ServersPage::on_moveDownBtn_clicked()
{
if(m_model->moveDown(currentServer))
{
currentServer ++;
}
}
void ServersPage::on_refreshBtn_clicked()
{
m_model->load();
}
#include "ServersPage.moc"