QDS-11411 Material Bundle crashes

This MR brings the following features;

• Better memory management
• Small performance enhancements

src/backend.cpp

@@ -74,11 +74,10 @@ void Backend::initialize()
         updateUserProjectList();
     }
 
-    connect(&m_serviceConnector, &ServiceConnector::downloadProgress, this, &Backend::downloadProgress);
-    connect(&m_projectManager,
-            &ProjectManager::projectStateChanged,
+    connect(&m_serviceConnector,
+            &ServiceConnector::downloadProgress,
             this,
-            &Backend::popupTextChanged);
+            &Backend::downloadProgress);
 
     qDebug("Initialization complete");
 }
@@ -90,6 +89,26 @@ void Backend::updatePopup(const QString &text, bool indeterminate)
     QEventLoop().processEvents(QEventLoop::AllEvents, 100);
 }
 
+void Backend::initializeProjectManager()
+{
+    if (m_projectManager)
+        return;
+
+    qDebug() << "Initializing Project Manager";
+    m_projectManager.reset(new ProjectManager);
+    connect(m_projectManager.data(),
+            &ProjectManager::projectStateChanged,
+            this,
+            &Backend::popupTextChanged);
+    connect(m_projectManager.data(), &ProjectManager::closingProject, this, [&] {
+        emit popupClose();
+        qDebug() << "Project Manager is closing";
+        m_projectManager.reset();
+    });
+
+    qDebug() << "Project Manager is initialized";
+}
+
 bool Backend::connectDesignStudio()
 {
     if (m_designStudioConnector) {
@@ -112,13 +131,14 @@ bool Backend::connectDesignStudio()
 
             connect(m_designStudioConnector.data(),
                     &DesignStudioConnector::projectReceived,
-                    &m_projectManager,
+                    this,
                     [this](const QByteArray &projectData) {
                         qDebug() << "Project received from Design Studio";
+                        initializeProjectManager();
                         emit popupOpen();
                         updatePopup("Unpacking project...");
                         qDebug() << "Project data size: " << projectData.size();
-                        const QString projectPath = m_projectManager.unpackProject(projectData);
+                        const QString projectPath = m_projectManager->unpackProject(projectData);
 
                         if (projectPath.isEmpty()) {
                             qCritical()
@@ -131,11 +151,11 @@ bool Backend::connectDesignStudio()
                         qDebug() << "Project unpacked to " << projectPath;
                         updatePopup("Running project...");
 
-                        if (!m_projectManager.runProject(projectPath)) {
+                        if (!m_projectManager->runProject(projectPath)) {
                             qCritical() << "Could not run project. Please check the logs for more "
                                            "information.";
                         } else {
-                            m_projectManager.showAppWindow();
+                            m_projectManager->showAppWindow();
                         }
                         emit popupClose();
                     });
@@ -178,10 +198,11 @@ void Backend::disconnectDesignStudio()
 
 void Backend::runDemoProject(const QString &projectName)
 {
+    initializeProjectManager();
     qDebug() << "Checking if demo project is cached for " << projectName;
     emit popupOpen();
 
-    const bool cached = m_projectManager.isDemoProjectCached(projectName);
+    const bool cached = m_projectManager->isDemoProjectCached(projectName);
 
     if (!cached) {
         updatePopup("Downloading demo project...", false);
@@ -191,7 +212,7 @@ void Backend::runDemoProject(const QString &projectName)
         qDebug() << "Demo project is not cached. Trying to download from " << url << " ...";
 
         updatePopup("Caching demo project...");
-        if (!m_projectManager.cacheDemoProject(project, projectName)) {
+        if (!m_projectManager->cacheDemoProject(project, projectName)) {
             qCritical()
                 << "Could not cache demo project. Please check the logs for more information.";
             emit popupClose();
@@ -202,10 +223,10 @@ void Backend::runDemoProject(const QString &projectName)
     }
 
     updatePopup("Running demo project...");
-    if (!m_projectManager.runDemoProject(projectName))
+    if (!m_projectManager->runDemoProject(projectName))
         qCritical() << "Could not run demo project. Please check the logs for more information.";
     else
-        m_projectManager.showAppWindow();
+        m_projectManager->showAppWindow();
 
     emit popupClose();
 }
@@ -214,12 +235,15 @@ void Backend::clearDemoCaches()
 {
     emit popupOpen();
     updatePopup("Clearing demo caches...");
-    m_projectManager.clearDemoCaches();
+    m_projectManager.reset(new ProjectManager);
+    m_projectManager->clearDemoCaches();
+    m_projectManager.reset();
     emit popupClose();
 }
 
 void Backend::runUserProject(const QString &url)
 {
+    initializeProjectManager();
     updatePopup("Running user project");
     emit popupOpen();
 
@@ -236,7 +260,7 @@ void Backend::runUserProject(const QString &url)
         }
     }
 
-    const bool projectCached = m_projectManager.isProjectCached(projectInfo);
+    const bool projectCached = m_projectManager->isProjectCached(projectInfo);
 
     if (!projectCached) {
         qDebug("Project is not cached. Downloading...");
@@ -244,7 +268,7 @@ void Backend::runUserProject(const QString &url)
         QByteArray projectData = m_serviceConnector.fetchProject(url);
 
         updatePopup("Caching user project...");
-        if (!m_projectManager.cacheProject(projectData, projectInfo)) {
+        if (!m_projectManager->cacheProject(projectData, projectInfo)) {
             qCritical() << "Could not cache project. Please check the logs for more information.";
             emit popupClose();
             return;
@@ -254,10 +278,10 @@ void Backend::runUserProject(const QString &url)
     }
 
     updatePopup("Running cached project...");
-    if (!m_projectManager.runCachedProject(projectInfo))
+    if (!m_projectManager->runCachedProject(projectInfo))
         qCritical() << "Could not run project. Please check the logs for more information.";
     else
-        m_projectManager.showAppWindow();
+        m_projectManager->showAppWindow();
 
     emit popupClose();
 }