/
usermodel.cpp
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/
usermodel.cpp
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/*
* Copyright (C) 2020 Open Mobile Platform LLC.
*
* You may use this file under the terms of the BSD license as follows:
*
* "Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Nemo Mobile nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
*/
#include "usermodel.h"
#include "logging_p.h"
#include <QDBusConnection>
#include <QDBusConnectionInterface>
#include <QDBusInterface>
#include <QDBusMetaType>
#include <QDBusPendingCall>
#include <QDBusPendingReply>
#include <QDBusServiceWatcher>
#include <QString>
#include <functional>
#include <sailfishusermanagerinterface.h>
#include <grp.h>
#include <sys/types.h>
namespace {
const auto UserManagerService = QStringLiteral(SAILFISH_USERMANAGER_DBUS_INTERFACE);
const auto UserManagerPath = QStringLiteral(SAILFISH_USERMANAGER_DBUS_OBJECT_PATH);
const auto UserManagerInterface = QStringLiteral(SAILFISH_USERMANAGER_DBUS_INTERFACE);
}
UserModel::UserModel(QObject *parent)
: QAbstractListModel(parent)
, m_dBusInterface(nullptr)
, m_dBusWatcher(new QDBusServiceWatcher(UserManagerService, QDBusConnection::systemBus(),
QDBusServiceWatcher::WatchForRegistration | QDBusServiceWatcher::WatchForUnregistration, this))
{
qDBusRegisterMetaType<SailfishUserManagerEntry>();
connect(m_dBusWatcher, &QDBusServiceWatcher::serviceRegistered,
this, &UserModel::createInterface);
connect(m_dBusWatcher, &QDBusServiceWatcher::serviceUnregistered,
this, &UserModel::destroyInterface);
if (QDBusConnection::systemBus().interface()->isServiceRegistered(UserManagerService))
createInterface();
struct group *grp = getgrnam("users");
for (int i = 0; grp->gr_mem[i] != nullptr; ++i) {
UserInfo user(QString(grp->gr_mem[i]));
if (user.isValid()) { // Skip invalid users here
m_users.append(user);
m_uidsToRows.insert(user.uid(), m_users.count()-1);
}
}
// grp must not be free'd
}
UserModel::~UserModel()
{
}
bool UserModel::placeholder()
{
// Placeholder is always last and the only item that can be invalid
if (m_users.count() == 0)
return false;
return !m_users.last().isValid();
}
void UserModel::setPlaceholder(bool value)
{
if (placeholder() == value)
return;
if (value) {
auto row = m_users.count();
beginInsertRows(QModelIndex(), row, row);
m_users.append(UserInfo::placeholder());
endInsertRows();
} else {
auto row = m_users.count()-1;
beginRemoveRows(QModelIndex(), row, row);
m_users.remove(row);
endRemoveRows();
}
emit placeholderChanged();
}
QHash<int, QByteArray> UserModel::roleNames() const
{
static const QHash<int, QByteArray> roles = {
{ Qt::DisplayRole, "displayName" },
{ UsernameRole, "username" },
{ NameRole, "name" },
{ TypeRole, "type" },
{ UidRole, "uid" },
{ CurrentRole, "current" },
{ PlaceholderRole, "placeholder" },
};
return roles;
}
int UserModel::rowCount(const QModelIndex &parent) const
{
Q_UNUSED(parent)
return m_users.count();
}
QVariant UserModel::data(const QModelIndex &index, int role) const
{
if (index.row() < 0 || index.row() >= m_users.count() || index.column() != 0)
return QVariant();
const UserInfo &user = m_users.at(index.row());
switch (role) {
case Qt::DisplayRole:
return (user.name().isEmpty()) ? user.username() : user.name();
case UsernameRole:
return user.username();
case NameRole:
return user.name();
case TypeRole:
return user.type();
case UidRole:
return user.uid();
case CurrentRole:
return user.current();
case PlaceholderRole:
return !user.isValid();
default:
return QVariant();
}
}
bool UserModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
if (index.row() < 0 || index.row() >= m_users.count() || index.column() != 0)
return false;
UserInfo &user = m_users[index.row()];
switch (role) {
case NameRole: {
QString name = value.toString();
if (name.isEmpty() || name == user.name())
return false;
user.setName(name);
if (user.isValid()) {
createInterface();
auto call = m_dBusInterface->asyncCall(QStringLiteral("modifyUser"), (uint)user.uid(), name);
auto *watcher = new QDBusPendingCallWatcher(call, this);
connect(watcher, &QDBusPendingCallWatcher::finished,
this, std::bind(&UserModel::userModifyFinished, this, std::placeholders::_1, index.row()));
}
emit dataChanged(index, index, QVector<int>() << role);
return true;
}
case Qt::DisplayRole:
case UsernameRole:
case TypeRole:
case UidRole:
case CurrentRole:
case PlaceholderRole:
default:
return false;
}
}
QModelIndex UserModel::index(int row, int column, const QModelIndex &parent) const
{
Q_UNUSED(parent);
if (row < 0 || row >= m_users.count() || column != 0)
return QModelIndex();
// create index
return createIndex(row, 0, row);
}
/*
* Creates new user from a placeholder user.
*
* Does nothing if there is no placeholder or user's name is not set.
*/
void UserModel::createUser()
{
if (!placeholder())
return;
auto user = m_users.last();
if (user.name().isEmpty())
return;
createInterface();
auto call = m_dBusInterface->asyncCall(QStringLiteral("addUser"), user.name());
auto *watcher = new QDBusPendingCallWatcher(call, this);
connect(watcher, &QDBusPendingCallWatcher::finished,
this, std::bind(&UserModel::userAddFinished, this, std::placeholders::_1, m_users.count()-1));
}
void UserModel::removeUser(int row)
{
if (row < 0 || row >= m_users.count())
return;
auto user = m_users.at(row);
if (!user.isValid())
return;
createInterface();
auto call = m_dBusInterface->asyncCall(QStringLiteral("removeUser"), (uint)user.uid());
auto *watcher = new QDBusPendingCallWatcher(call, this);
connect(watcher, &QDBusPendingCallWatcher::finished,
this, std::bind(&UserModel::userRemoveFinished, this, std::placeholders::_1, row));
}
void UserModel::reset(int row)
{
if (row < 0 || row >= m_users.count())
return;
m_users[row].reset();
auto idx = index(row, 0);
emit dataChanged(idx, idx, QVector<int>());
}
UserInfo * UserModel::getCurrentUser() const
{
return new UserInfo();
}
void UserModel::userAdded(const SailfishUserManagerEntry &entry)
{
if (m_uidsToRows.contains(entry.uid))
return;
// Not found already, appending
auto user = UserInfo(entry.uid);
if (user.isValid()) {
int row = placeholder() ? m_users.count()-1 : m_users.count();
beginInsertRows(QModelIndex(), row, row);
m_users.insert(row, user);
m_uidsToRows.insert(entry.uid, row);
endInsertRows();
}
}
void UserModel::userModified(uint uid, const QString &newName)
{
if (!m_uidsToRows.contains(uid))
return;
int row = m_uidsToRows.value(uid);
UserInfo &user = m_users[row];
if (user.name() != newName) {
user.setName(newName);
auto idx = index(row, 0);
dataChanged(idx, idx, QVector<int>() << NameRole);
}
}
void UserModel::userRemoved(uint uid)
{
if (!m_uidsToRows.contains(uid))
return;
int row = m_uidsToRows.value(uid);
beginRemoveRows(QModelIndex(), row, row);
m_users.remove(row);
m_uidsToRows.remove(uid);
endRemoveRows();
}
void UserModel::userAddFinished(QDBusPendingCallWatcher *call, int row)
{
QDBusPendingReply<uint> reply = *call;
if (reply.isError()) {
emit userAddFailed();
qWarning() << "Adding user with usermanager failed:" << reply.error();
} else {
uint uid = reply.value();
// Check that this was not just added to the list by userAdded
if (!m_uidsToRows.contains(uid)) {
beginInsertRows(QModelIndex(), row, row);
m_users.insert(row, UserInfo(uid));
m_uidsToRows.insert(uid, row);
endInsertRows();
}
// Reset placeholder
reset(m_users.count()-1);
}
call->deleteLater();
}
void UserModel::userModifyFinished(QDBusPendingCallWatcher *call, int row)
{
QDBusPendingReply<void> reply = *call;
if (reply.isError()) {
emit userModifyFailed(row, m_users.at(row).name());
qWarning() << "Modifying user with usermanager failed:" << reply.error();
reset(row);
} // else awesome! (data was changed already)
call->deleteLater();
}
void UserModel::userRemoveFinished(QDBusPendingCallWatcher *call, int row)
{
QDBusPendingReply<void> reply = *call;
if (reply.isError()) {
emit userRemoveFailed(row, m_users.at(row).name());
qWarning() << "Removing user with usermanager failed:" << reply.error();
} // else awesome! (waiting for signal to alter data)
call->deleteLater();
}
void UserModel::createInterface()
{
if (!m_dBusInterface) {
qCDebug(lcUsersLog) << "Creating interface to user-managerd";
m_dBusInterface = new QDBusInterface(UserManagerService, UserManagerPath, UserManagerInterface,
QDBusConnection::systemBus(), this);
connect(m_dBusInterface, SIGNAL(userAdded(const SailfishUserManagerEntry &)),
this, SLOT(userAdded(const SailfishUserManagerEntry &)), Qt::QueuedConnection);
connect(m_dBusInterface, SIGNAL(userModified(uint, const QString &)),
this, SLOT(userModified(uint, const QString &)));
connect(m_dBusInterface, SIGNAL(userRemoved(uint)),
this, SLOT(userRemoved(uint)));
}
}
void UserModel::destroyInterface() {
if (m_dBusInterface) {
qCDebug(lcUsersLog) << "Destroying interface to user-managerd";
disconnect(m_dBusInterface, 0, this, 0);
m_dBusInterface->deleteLater();
m_dBusInterface = nullptr;
}
}