[netinstall] Rip loading out of the UI page

- Create a config object in the ViewStep
- Model lives in the config object and loads there
- Give model to the UI page for display

src/modules/netinstall/Config.cpp

@@ -29,7 +29,6 @@
 
 Config::Config( QObject* parent )
     : QObject( parent )
-    , m_status( Status::Ok )
     , m_model( new PackageModel( this ) )
 {
 }

src/modules/netinstall/Config.h

@@ -51,6 +51,9 @@ public:
     QString status() const;
     void setStatus( Status s );
 
+    bool required() const { return m_required; }
+    void setRequired( bool r ) { m_required = r; }
+
     /** @brief Retrieves the groups, with name, description and packages
      *
      * Loads data from the given URL. Once done, the data is parsed
@@ -65,6 +68,8 @@ public:
      */
     void loadGroupList( const QVariantList& groupData );
 
+    PackageModel* model() const { return m_model; }
+
 signals:
     void statusChanged( QString status );
 
@@ -72,9 +77,10 @@ private slots:
     void receivedGroupData();  ///< From async-loading group data
 
 private:
-    Status m_status;
-    PackageModel* m_model;
+    PackageModel* m_model = nullptr;
     QNetworkReply* m_reply = nullptr;  // For fetching data
+    Status m_status = Status::Ok;
+    bool m_required = false;
 };
 
 #endif

src/modules/netinstall/NetInstallPage.cpp

@@ -37,19 +37,13 @@
 NetInstallPage::NetInstallPage( QWidget* parent )
     : QWidget( parent )
     , ui( new Ui::Page_NetInst )
-    , m_reply( nullptr )
-    , m_groups( nullptr )
 {
     ui->setupUi( this );
     setPageTitle( nullptr );
     CALAMARES_RETRANSLATE_SLOT( &NetInstallPage::retranslate );
 }
 
-NetInstallPage::~NetInstallPage()
-{
-    delete m_groups;
-    delete m_reply;
-}
+NetInstallPage::~NetInstallPage() {}
 
 void
 NetInstallPage::setPageTitle( CalamaresUtils::Locale::TranslatedString* t )
@@ -75,165 +69,21 @@ NetInstallPage::retranslate()
     }
 }
 
-bool
-NetInstallPage::readGroups( const QByteArray& yamlData )
-{
-    try
-    {
-        YAML::Node groups = YAML::Load( yamlData.constData() );
-
-        if ( !groups.IsSequence() )
-        {
-            cWarning() << "netinstall groups data does not form a sequence.";
-        }
-        Q_ASSERT( groups.IsSequence() );
-        m_groups = new PackageModel();
-        m_groups->setupModelData( CalamaresUtils::yamlSequenceToVariant( groups ) );
-        return true;
-    }
-    catch ( YAML::Exception& e )
-    {
-        CalamaresUtils::explainYamlException( e, yamlData, "netinstall groups data" );
-        return false;
-    }
-}
-
-/// @brief Convenience to zero out and deleteLater on the reply, used in dataIsHere
-struct ReplyDeleter
-{
-    QNetworkReply*& p;
-
-    ~ReplyDeleter()
-    {
-        if ( p )
-        {
-            p->deleteLater();
-        }
-        p = nullptr;
-    }
-};
-
 void
-NetInstallPage::dataIsHere()
-{
-    if ( !m_reply || !m_reply->isFinished() )
-    {
-        cWarning() << "NetInstall data called too early.";
-        return;
-    }
-
-    cDebug() << "NetInstall group data received" << m_reply->url();
-
-    ReplyDeleter d { m_reply };
-
-    // If m_required is *false* then we still say we're ready
-    // even if the reply is corrupt or missing.
-    if ( m_reply->error() != QNetworkReply::NoError )
-    {
-        cWarning() << "unable to fetch netinstall package lists.";
-        cDebug() << Logger::SubEntry << "Netinstall reply error: " << m_reply->error();
-        cDebug() << Logger::SubEntry << "Request for url: " << m_reply->url().toString()
-                 << " failed with: " << m_reply->errorString();
-        ui->netinst_status->setText(
-            tr( "Network Installation. (Disabled: Unable to fetch package lists, check your network connection)" ) );
-        emit checkReady( !m_required );
-        return;
-    }
-
-    if ( !readGroups( m_reply->readAll() ) )
-    {
-        cWarning() << "netinstall groups data was received, but invalid.";
-        cDebug() << Logger::SubEntry << "Url:     " << m_reply->url().toString();
-        cDebug() << Logger::SubEntry << "Headers: " << m_reply->rawHeaderList();
-        ui->netinst_status->setText( tr( "Network Installation. (Disabled: Received invalid groups data)" ) );
-        emit checkReady( !m_required );
-        return;
-    }
-
-    retranslate();  // For changed model
-    ui->groupswidget->setModel( m_groups );
-    ui->groupswidget->header()->setSectionResizeMode( 0, QHeaderView::ResizeToContents );
-    ui->groupswidget->header()->setSectionResizeMode( 1, QHeaderView::Stretch );
-
-    expandGroups();
-
-    emit checkReady( true );
-}
-
-void
-NetInstallPage::expandGroups()
+NetInstallPage::setModel( QAbstractItemModel* model )
 {
+    ui->groupswidget->setModel( model );
     // Go backwards because expanding a group may cause rows to appear below it
-    for ( int i = m_groups->rowCount() - 1; i >= 0; --i )
+    for ( int i = model->rowCount() - 1; i >= 0; --i )
     {
-        auto index = m_groups->index( i, 0 );
-        if ( m_groups->data( index, PackageModel::MetaExpandRole ).toBool() )
+        auto index = model->index( i, 0 );
+        if ( model->data( index, PackageModel::MetaExpandRole ).toBool() )
         {
             ui->groupswidget->setExpanded( index, true );
         }
     }
 }
 
-PackageTreeItem::List
-NetInstallPage::selectedPackages() const
-{
-    if ( m_groups )
-    {
-        return m_groups->getPackages();
-    }
-    else
-    {
-        cWarning() << "no netinstall groups are available.";
-        return PackageTreeItem::List();
-    }
-}
-
-void
-NetInstallPage::loadGroupList( const QString& confUrl )
-{
-    using namespace CalamaresUtils::Network;
-
-    cDebug() << "NetInstall loading groups from" << confUrl;
-    QNetworkReply* reply = Manager::instance().asynchronouseGet(
-        QUrl( confUrl ),
-        RequestOptions( RequestOptions::FakeUserAgent | RequestOptions::FollowRedirect, std::chrono::seconds( 30 ) ) );
-
-    if ( !reply )
-    {
-        cDebug() << Logger::Continuation << "request failed immediately.";
-        ui->netinst_status->setText( tr( "Network Installation. (Disabled: Incorrect configuration)" ) );
-    }
-    else
-    {
-        m_reply = reply;
-        connect( reply, &QNetworkReply::finished, this, &NetInstallPage::dataIsHere );
-    }
-}
-
-void
-NetInstallPage::loadGroupList( const QVariantList& l )
-{
-    // This short-cuts through loading and just uses the data,
-    // containing cruft from dataIsHere() and readGroups().
-    m_groups = new PackageModel();
-    m_groups->setupModelData( l );
-    retranslate();  // For changed model
-    ui->groupswidget->setModel( m_groups );
-    ui->groupswidget->header()->setSectionResizeMode( 0, QHeaderView::ResizeToContents );
-    ui->groupswidget->header()->setSectionResizeMode( 1, QHeaderView::Stretch );
-
-    expandGroups();
-
-    emit checkReady( true );
-}
-
-
-void
-NetInstallPage::setRequired( bool b )
-{
-    m_required = b;
-}
-
 
 void
 NetInstallPage::onActivate()

src/modules/netinstall/NetInstallPage.h

@@ -56,56 +56,27 @@ public:
      */
     void setPageTitle( CalamaresUtils::Locale::TranslatedString* );
 
+    /** @brief Sets the model of packages to display
+     *
+     * While setting up the UI, expand entries that should be pre-expanded.
+     *
+     * Follows the *expanded* key / the startExpanded field in the
+     * group entries of the model. Call this after filling up the model.
+     */
+    void setModel( QAbstractItemModel* );
+
     void onActivate();
 
-    /** @brief Retrieves the groups, with name, description and packages
-     *
-     * Loads data from the given URL. This should be called before
-     * displaying the page.
-     */
-    void loadGroupList( const QString& url );
-    /// @brief Retrieve pre-processed and fetched group data
-    void loadGroupList( const QVariantList& l );
-
-    // Sets the "required" state of netinstall data. Influences whether
-    // corrupt or unavailable data causes checkReady() to be emitted
-    // true (not-required) or false.
-    void setRequired( bool );
-    bool getRequired() const { return m_required; }
-
-    // Returns the list of packages belonging to groups that are
-    // selected in the view in this given moment. No data is cached here, so
-    // this function does not have constant time.
-    PackageTreeItem::List selectedPackages() const;
-
 public slots:
-    void dataIsHere();
-
     void retranslate();
 
 signals:
     void checkReady( bool );
 
 private:
-    // Takes the YAML data representing the groups and reads them into the
-    // m_groups and m_groupOrder internal structures. See the README.md
-    // of this module to know the format expected of the YAML files.
-    bool readGroups( const QByteArray& yamlData );
-
-    /** @brief Expand entries that should be pre-expanded
-     *
-     * Follows the *expanded* key / the startExpanded field in the
-     * group entries of the model. Call this after filling up the model.
-     */
-    void expandGroups();
-
     Ui::Page_NetInst* ui;
 
     std::unique_ptr< CalamaresUtils::Locale::TranslatedString > m_title;  // Above the treeview
-
-    QNetworkReply* m_reply;
-    PackageModel* m_groups;
-    bool m_required;
 };
 
 #endif  // NETINSTALLPAGE_H

src/modules/netinstall/NetInstallViewStep.cpp

@@ -33,8 +33,8 @@ CALAMARES_PLUGIN_FACTORY_DEFINITION( NetInstallViewStepFactory, registerPlugin<
 NetInstallViewStep::NetInstallViewStep( QObject* parent )
     : Calamares::ViewStep( parent )
     , m_widget( new NetInstallPage() )
-    , m_nextEnabled( false )
     , m_sidebarLabel( nullptr )
+    , m_nextEnabled( false )
 {
     emit nextStatusChanged( true );
     connect( m_widget, &NetInstallPage::checkReady, this, &NetInstallViewStep::nextIsReady );
@@ -127,7 +127,7 @@ NetInstallViewStep::onActivate()
 void
 NetInstallViewStep::onLeave()
 {
-    auto packages = m_widget->selectedPackages();
+    auto packages = m_config.model()->getPackages();
     cDebug() << "Netinstall: Processing" << packages.length() << "packages.";
 
     static const char PACKAGEOP[] = "packageOperations";
@@ -201,7 +201,8 @@ NetInstallViewStep::nextIsReady( bool b )
 void
 NetInstallViewStep::setConfigurationMap( const QVariantMap& configurationMap )
 {
-    m_widget->setRequired( CalamaresUtils::getBool( configurationMap, "required", false ) );
+    m_config.setRequired( CalamaresUtils::getBool( configurationMap, "required", false ) );
+    m_widget->setModel( m_config.model() );
 
     QString groupsUrl = CalamaresUtils::getString( configurationMap, "groupsUrl" );
     if ( !groupsUrl.isEmpty() )
@@ -212,11 +213,11 @@ NetInstallViewStep::setConfigurationMap( const QVariantMap& configurationMap )
         if ( groupsUrl == QStringLiteral( "local" ) )
         {
             QVariantList l = configurationMap.value( "groups" ).toList();
-            m_widget->loadGroupList( l );
+            m_config.loadGroupList( l );
         }
         else
         {
-            m_widget->loadGroupList( groupsUrl );
+            m_config.loadGroupList( groupsUrl );
         }
     }
 

src/modules/netinstall/NetInstallViewStep.h

@@ -20,6 +20,8 @@
 #ifndef NETINSTALLVIEWSTEP_H
 #define NETINSTALLVIEWSTEP_H
 
+#include "Config.h"
+
 #include "DllMacro.h"
 #include "locale/TranslatableConfiguration.h"
 #include "utils/PluginFactory.h"
@@ -60,9 +62,11 @@ public slots:
     void nextIsReady( bool );
 
 private:
+    Config m_config;
+
     NetInstallPage* m_widget;
-    bool m_nextEnabled;
     CalamaresUtils::Locale::TranslatedString* m_sidebarLabel;  // As it appears in the sidebar
+    bool m_nextEnabled;
 };
 
 CALAMARES_PLUGIN_FACTORY_DECLARATION( NetInstallViewStepFactory )