refs #787, utility functions for shared files

* get file name from URL
* service and file names in CDbInfo
* adjusted DB flags, allow to load headers only
* set of entity flags

src/blackmisc/network/entityflags.cpp

@@ -155,6 +155,18 @@ namespace BlackMisc
             return NoEntity;
         }
 
+        QSet<CEntityFlags::Entity> CEntityFlags::asSingleEntities(Entity entities)
+        {
+            QSet<CEntityFlags::Entity> s;
+            CEntityFlags::Entity currentEntity = iterateDbEntities(entities);
+            while (currentEntity != NoEntity)
+            {
+                s.insert(currentEntity);
+                currentEntity = iterateDbEntities(entities);
+            }
+            return s;
+        }
+
         void CEntityFlags::registerMetadata()
         {
             // this is no value class and I register enums here,

src/blackmisc/network/entityflags.h

@@ -96,7 +96,10 @@ namespace BlackMisc
             static bool anySwiftDbEntity(Entity entities);
 
             //! Get by name
-            static CEntityFlags::Entity singleEntityByName(const QString &name);
+            static Entity singleEntityByName(const QString &name);
+
+            //! As set of single entities
+            static QSet<Entity> asSingleEntities(Entity entities);
 
             //! Register metadata
             static void registerMetadata();

src/blackmisc/network/url.cpp

@@ -124,6 +124,11 @@ namespace BlackMisc
             setQUrl(QUrl(fullUrl));
         }
 
+        QString CUrl::getFileName() const
+        {
+            return toQUrl().fileName();
+        }
+
         QUrl CUrl::toQUrl() const
         {
             return QUrl(getFullUrl());

src/blackmisc/network/url.h

@@ -115,6 +115,9 @@ namespace BlackMisc
             //! Set full URL
             void setFullUrl(const QString &fullUrl);
 
+            //! File name
+            QString getFileName() const;
+
             //! To QUrl
             QUrl toQUrl() const;