File indexing completed on 2024-05-05 17:33:23

 /*
  *   SPDX-FileCopyrightText: 2010 Jonathan Thomas <echidnaman@kubuntu.org>
  *   SPDX-FileCopyrightText: 2012 Aleix Pol Gonzalez <aleixpol@blue-systems.com>
  *
  *   SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
  */
 
 #include "TransactionListener.h"
 
 #include "../resources/AbstractResource.h"
 #include "TransactionModel.h"
 #include "libdiscover_debug.h"
 #include <QMetaProperty>
 
 TransactionListener::TransactionListener(QObject *parent)
     : QObject(parent)
     , m_resource(nullptr)
     , m_transaction(nullptr)
 {
     connect(TransactionModel::global(), &TransactionModel::transactionAdded, this, &TransactionListener::transactionAdded);
 }
 
 void TransactionListener::cancel()
 {
     if (!isCancellable()) {
         return;
     }
     m_transaction->cancel();
 }
 
 bool TransactionListener::isCancellable() const
 {
     return m_transaction && m_transaction->isCancellable();
 }
 
 bool TransactionListener::isActive() const
 {
     return m_transaction && m_transaction->status() != Transaction::SetupStatus;
 }
 
 QString TransactionListener::statusText() const
 {
     QModelIndex index = TransactionModel::global()->indexOf(m_resource);
 
     return index.data(TransactionModel::StatusTextRole).toString();
 }
 
 void TransactionListener::setResource(AbstractResource *resource)
 {
     setResourceInternal(resource);
     // Catch already-started transactions
     setTransaction(TransactionModel::global()->transactionFromResource(resource));
 }
 
 void TransactionListener::setResourceInternal(AbstractResource *resource)
 {
     if (m_resource == resource)
         return;
 
     m_resource = resource;
     Q_EMIT resourceChanged();
 }
 
 void TransactionListener::transactionAdded(Transaction *trans)
 {
     if (trans->resource() != m_resource)
         return;
 
     setTransaction(trans);
 }
 
 class CheckChange
 {
 public:
     CheckChange(QObject *obj, const QByteArray &prop)
         : m_object(obj)
         , m_prop(obj->metaObject()->property(obj->metaObject()->indexOfProperty(prop.constData())))
         , m_oldValue(m_prop.read(obj))
     {
         Q_ASSERT(obj->metaObject()->indexOfProperty(prop.constData()) >= 0);
     }
 
     ~CheckChange()
     {
         const QVariant newValue = m_prop.read(m_object);
         if (newValue != m_oldValue) {
             QMetaMethod m = m_prop.notifySignal();
             m.invoke(m_object, Qt::DirectConnection);
         }
     }
 
 private:
     QObject *m_object;
     QMetaProperty m_prop;
     QVariant m_oldValue;
 };
 
 void TransactionListener::setTransaction(Transaction *trans)
 {
     if (m_transaction == trans) {
         return;
     }
 
     if (m_transaction) {
         disconnect(m_transaction, nullptr, this, nullptr);
     }
 
     CheckChange change1(this, "isCancellable");
     CheckChange change2(this, "isActive");
     CheckChange change3(this, "statusText");
     CheckChange change4(this, "progress");
 
     m_transaction = trans;
     if (m_transaction) {
         connect(m_transaction, &Transaction::cancellableChanged, this, &TransactionListener::cancellableChanged);
         connect(m_transaction, &Transaction::statusChanged, this, &TransactionListener::transactionStatusChanged);
         connect(m_transaction, &Transaction::progressChanged, this, &TransactionListener::progressChanged);
         connect(m_transaction, &QObject::destroyed, this, [this]() {
             qCDebug(LIBDISCOVER_LOG) << "destroyed transaction before finishing";
             setTransaction(nullptr);
         });
         setResourceInternal(trans->resource());
     }
     Q_EMIT transactionChanged(trans);
 }
 
 void TransactionListener::transactionStatusChanged(Transaction::Status status)
 {
     switch (status) {
     case Transaction::CancelledStatus:
         setTransaction(nullptr);
         Q_EMIT cancelled();
         break;
     case Transaction::DoneWithErrorStatus:
     case Transaction::DoneStatus:
         setTransaction(nullptr);
         break;
     default:
         break;
     }
 
     Q_EMIT statusTextChanged();
 }
 
 int TransactionListener::progress() const
 {
     return m_transaction ? m_transaction->progress() : 0;
 }
 
 #include "moc_TransactionListener.cpp"