Before this change the query examined at every course_module record in
the context table.
With this change we use the course_modules table to more efficiently
find all the activities in the course, which means that many less
records in the context table need to be examined.
This chagne adds support for a new feature known as Context Locking.
This allows a context to be locked, thereby removing all write
capabilities for all users (including admin) for that context, and all
child contexts.
When searching for non-empty children first retrieve list of all non-empty
fileareas in modules and then check access for each of them. This will be
much faster than checking access for each module and then look for files
and areas inside this module.
Do the same with course file areas
- Store cm_info in file_info_context_module instead of object
- Use correct API calls to component_callback_exists
- Use human readable name of module type
- Preload contexts of subcategories and courses when retrieving their lists
- When there are enrolled courses in hidden subcategories retrieve them together with direct children courses
- Do not call browser->get_file_info - it retrieves the coursecat/course again, instead initialise the instance
of file_info_context_coursecat or file_info_context_course
This also has a couple of bugfixes:
- file_info_context_system::get_children() was looking for courses with parent=0, it is impossible, block removed;
- file_info_context_coursecat::get_area_coursecat_description() was checking the wrong capability to view files in description
When clicking on 'Restore' next to a file in the 'Course
backup area' in the system context the message 'Sorry,
the requested file could not be found' was displayed.
This fix adds missing functionality to the class
'file_info_context_system' so that the file information
is correctly returned.
- 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
- do not die with fatal error if source file in moodle internal repository is missing;
- moved code duplication for moodle repositories into class repository (functions send_file, get_reference_details, get_file_by_reference, get_file_reference);
- update file status after repository::sync_external_file so we know that it is missing (or not missing anymore). Do not run this function more than once for file within one request;
- display readable name for Private Files and Server files with the new format;
- display broken icon in filemanager if we know that source is missing, display information (for admin) where it was located before: see repository::get_reference_details() and extending classes;
- removed unnecessary queries in stored_file::sync_external_file();
- syncronize files before displaying it's size in mod_resource, do not query directly
- changed function repository::copy_to_area so it accepts more file attributes, pass changed attributes to it
- changed file_info::copy_to_storage and file_info_stored::copy_to_storage to accept more file attributes
- simplified file size check for moodle files in repository/repository_ajax.php
- removed unused code in repository/repository_ajax.php
- 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
