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.
/**
* Data provider.
*
* @package core_files
* @copyright 2018 Frédéric Massart
* @author Frédéric Massart
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core_files\privacy;
defined('MOODLE_INTERNAL') || die();
use core_privacy\local\metadata\collection;
use core_privacy\local\request\contextlist;
use core_privacy\local\request\approved_contextlist;
use core_privacy\local\request\userlist;
use core_privacy\local\request\approved_userlist;
/**
* Data provider class.
*
* This only describes the files table, all components must handle the file exporting
* and deletion themselves.
*
* @package core_files
* @copyright 2018 Frédéric Massart
* @author Frédéric Massart
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class provider implements
\core_privacy\local\metadata\provider,
\core_privacy\local\request\subsystem\plugin_provider,
\core_privacy\local\request\core_userlist_provider,
// We store a userkey for token-based file access.
\core_privacy\local\request\subsystem\provider,
\core_privacy\local\request\shared_userlist_provider {
/**
* Returns metadata.
*
* @param collection $collection The initialised collection to add items to.
* @return collection A listing of user data stored through this system.
*/
public static function get_metadata(collection $collection) : collection {
$collection->add_database_table('files', [
'contenthash' => 'privacy:metadata:files:contenthash',
'filepath' => 'privacy:metadata:files:filepath',
'filename' => 'privacy:metadata:files:filename',
'userid' => 'privacy:metadata:files:userid',
'filesize' => 'privacy:metadata:files:filesize',
'mimetype' => 'privacy:metadata:files:mimetype',
'source' => 'privacy:metadata:files:source',
'author' => 'privacy:metadata:files:author',
'license' => 'privacy:metadata:files:license',
'timecreated' => 'privacy:metadata:files:timecreated',
'timemodified' => 'privacy:metadata:files:timemodified',
], 'privacy:metadata:files');
// Regarding this block, we are unable to export or purge this data, as
// it would damage the file conversion data across the whole site.
$collection->add_database_table('file_conversion', [
'usermodified' => 'privacy:metadata:file_conversion:usermodified',
], 'privacy:metadata:file_conversions');
$collection->add_subsystem_link('core_userkey', [], 'privacy:metadata:core_userkey');
return $collection;
}
/**
* Get the list of contexts that contain user information for the specified user.
*
* This is currently just the user context.
*
* @param int $userid The user to search.
* @return contextlist $contextlist The contextlist containing the list of contexts used in this plugin.
*/
public static function get_contexts_for_userid(int $userid) : contextlist {
$sql = "SELECT ctx.id
FROM {user_private_key} k
JOIN {user} u ON k.userid = u.id
JOIN {context} ctx ON ctx.instanceid = u.id AND ctx.contextlevel = :contextlevel
WHERE k.userid = :userid AND k.script = :script";
$params = [
'userid' => $userid,
'contextlevel' => CONTEXT_USER,
'script' => 'core_files',
];
$contextlist = new contextlist();
$contextlist->add_from_sql($sql, $params);
return $contextlist;
}
/**
* Get the list of users within a specific context.
*
* @param userlist $userlist The userlist containing the list of users who have data in this context/plugin combination.
*/
public static function get_users_in_context(userlist $userlist) {
$context = $userlist->get_context();
if (!$context instanceof \context_user) {
return;
}
\core_userkey\privacy\provider::get_user_contexts_with_script($userlist, $context, 'core_files');
}
/**
* Export all user data for the specified user, in the specified contexts.
*
* @param approved_contextlist $contextlist The approved contexts to export information for.
*/
public static function export_user_data(approved_contextlist $contextlist) {
// If the user has data, then only the CONTEXT_USER should be present so get the first context.
$contexts = $contextlist->get_contexts();
if (count($contexts) == 0) {
return;
}
// Sanity check that context is at the user context level, then get the userid.
$context = reset($contexts);
if ($context->contextlevel !== CONTEXT_USER) {
return;
}
// Export associated userkeys.
$subcontext = [
get_string('files'),
];
\core_userkey\privacy\provider::export_userkeys($context, $subcontext, 'core_files');
}
/**
* Delete all use data which matches the specified deletion_criteria.
*
* @param context $context A user context.
*/
public static function delete_data_for_all_users_in_context(\context $context) {
// Sanity check that context is at the user context level, then get the userid.
if ($context->contextlevel !== CONTEXT_USER) {
return;
}
// Delete all the userkeys.
\core_userkey\privacy\provider::delete_userkeys('core_files', $context->instanceid);
}
/**
* Delete multiple users within a single context.
*
* @param approved_userlist $userlist The approved context and user information to delete information for.
*/
public static function delete_data_for_users(approved_userlist $userlist) {
$context = $userlist->get_context();
if ($context instanceof \context_user) {
\core_userkey\privacy\provider::delete_userkeys('core_files', $context->instanceid);
}
}
/**
* Delete all user data for the specified user, in the specified contexts.
*
* @param approved_contextlist $contextlist The approved contexts and user information to delete information for.
*/
public static function delete_data_for_user(approved_contextlist $contextlist) {
// If the user has data, then only the user context should be present so get the first context.
$contexts = $contextlist->get_contexts();
if (count($contexts) == 0) {
return;
}
// Sanity check that context is at the user context level, then get the userid.
$context = reset($contexts);
if ($context->contextlevel !== CONTEXT_USER) {
return;
}
// Delete all the userkeys for core_files..
\core_userkey\privacy\provider::delete_userkeys('core_files', $context->instanceid);
}
}