Is there a single class that handles writing to the filesystem? I'm trying to determine if it is in any way possible to build a version if Concrete5 that works on a cloud hosting system like Google App Engine, which has no write access to the filesystem. For wordpress, they have a plugin which converts wordpress' file writing module to one that writes to a Google Storage Bucket. It is quite trivial in Wordpress to do this, but I just can't grok Wordpress's static content areas that require complex templates to use. What I would like to do is use c5 but re-route all the file writing to a storage bucket using the GAE php sdk.