[Owncloud] Filesystem's classes usage policy

[Alexander Zhuravlev]

Hi all!

I want to understand classes hierarchy which work with files. As i see: 
main input class is Files (i skip OC_ now and next times) which is 
wrapper for Filesystem, which works with Filestorage. As i think — Files 
must sanitize all data, but it doesn't do that. Usages of isValidPath 
method was founded only in Filesystemview. Files->normalizePath() uses 
only single in Files. I discouraged.

Can anybody do some more info about that functions and filesystem 
manipulation policy?