MediaLibrary: Move all blacklisting code to the Folder class

src/Folder.cpp

@@ -112,6 +112,12 @@ std::shared_ptr<Folder> Folder::create( DBConnection connection, const std::stri
 
 bool Folder::blacklist( DBConnection connection, const std::string& fullPath )
 {
+    auto f = fromPath( connection, fullPath );
+    if ( f != nullptr )
+    {
+        // Let the foreign key destroy everything beneath this folder
+        destroy( connection, f->id() );
+    }
     auto folderFs = FsFactory->createDirectory( fullPath );
     if ( folderFs == nullptr )
         return false;

src/MediaLibrary.cpp

@@ -397,12 +397,6 @@ void MediaLibrary::discover( const std::string &entryPoint )
 
 bool MediaLibrary::ignoreFolder( const std::string& path )
 {
-    auto f = Folder::fromPath( m_dbConnection.get(), path );
-    if ( f != nullptr )
-    {
-        // Let the foreign key destroy everything beneath this folder
-        Folder::destroy( m_dbConnection.get(), f->id() );
-    }
     return Folder::blacklist( m_dbConnection.get(), path );
 }