[libcalamaresui] Use meaningful type for Upload info

- use a struct with named fields instead of a tuple
- offer an operator bool() for the logic of does-it-make-sense-to-upload

src/libcalamaresui/Branding.cpp

@@ -162,14 +162,15 @@ uploadServerFromMap( const QVariantMap& map )
 
     if ( typestring.isEmpty() || urlstring.isEmpty() )
     {
-        return Branding::UploadServerInfo( Branding::UploadServerType::None, QUrl(), 0 );
+        return Branding::UploadServerInfo { Branding::UploadServerType::None, QUrl(), 0 };
     }
 
     bool bogus = false;  // we don't care about type-name lookup success here
-    return Branding::UploadServerInfo(
+    return Branding::UploadServerInfo {
         names.find( typestring, bogus ),
         QUrl( urlstring, QUrl::ParsingMode::StrictMode ),
-        sizeLimitKiB >= 0 ? CalamaresUtils::KiBtoBytes( static_cast< unsigned long long >( sizeLimitKiB ) ) : -1 );
+        sizeLimitKiB >= 0 ? CalamaresUtils::KiBtoBytes( static_cast< unsigned long long >( sizeLimitKiB ) ) : -1
+    };
 }
 
 /** @brief Load the @p map with strings from @p config

src/libcalamaresui/Branding.h

@@ -227,7 +227,14 @@ public:
      * is irrelevant and usually empty), the URL for the upload and the size limit of upload
      * in bytes (for configuration value < 0, it serves -1, which stands for having no limit).
      */
-    using UploadServerInfo = std::tuple< UploadServerType, QUrl, qint64 >;
+    struct UploadServerInfo
+    {
+        UploadServerType type;
+        QUrl url;
+        qint64 size;
+
+        operator bool() const { return type != Calamares::Branding::UploadServerType::None && size != 0; }
+    };
     UploadServerInfo uploadServer() const { return m_uploadServer; }
 
     /**

src/libcalamaresui/ViewManager.cpp

@@ -152,9 +152,7 @@ ViewManager::insertViewStep( int before, ViewStep* step )
 void
 ViewManager::onInstallationFailed( const QString& message, const QString& details )
 {
-    const auto webPaste = Calamares::Branding::instance()->uploadServer();
-    bool shouldOfferWebPaste
-        = std::get< 0 >( webPaste ) != Calamares::Branding::UploadServerType::None and std::get< 2 >( webPaste ) != 0;
+    bool shouldOfferWebPaste = bool( Calamares::Branding::instance()->uploadServer() );
 
     cError() << "Installation failed:" << message;
     cDebug() << Logger::SubEntry << "- message:" << message;