- file_info class now has new methods get_non_empty_children and count_non_empty_children; added default implementation;
- all core classes extending file_info have their implementation of those methods;
- class repository_local_file used for caching get_children() results is removed;
- class repository_local rewritten to use new methods from file_info;
- added caching of retrieved modules in file_browser::get_file_info_context_module() - this query is slow and executed multiple times on big servers
- Removed 'Private files' from 'Server files' repository;
- Show only non-empty directories (taking into account filetype filter);
- If there is only one non-empty filearea within a module, do not show it and skip the extra subdirectory level;
- If the user is not admin (does not have 'moodle/course:update' capability in system context), do not show course categories, just list available courses;
- Also when retrieving the course files capability to managefiles is checked before retrieving the modules list for performance tuning on sites with a lot of courses
Sam Hemelryk