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271 lines
11 KiB
271 lines
11 KiB
2 years ago
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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Privacy class for requesting user data for the favourites subsystem.
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*
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* @package core_favourites
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* @copyright 2018 Jake Dallimore <jrhdallimore@gmail.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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namespace core_favourites\privacy;
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defined('MOODLE_INTERNAL') || die();
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use \core_privacy\local\metadata\collection;
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use \core_privacy\local\request\context;
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use \core_privacy\local\request\approved_contextlist;
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use \core_privacy\local\request\transform;
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/**
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* Privacy class for requesting user data.
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*
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* @copyright 2018 Jake Dallimore <jrhdallimore@gmail.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class provider implements
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\core_privacy\local\metadata\provider,
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\core_privacy\local\request\subsystem\plugin_provider,
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\core_privacy\local\request\shared_userlist_provider {
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/**
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* Returns metadata about this system.
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*
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* @param collection $collection The initialised collection to add items to.
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* @return collection A listing of user data stored through this system.
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*/
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public static function get_metadata(collection $collection) : collection {
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return $collection->add_database_table('favourite', [
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'userid' => 'privacy:metadata:favourite:userid',
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'component' => 'privacy:metadata:favourite:component',
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'itemtype' => 'privacy:metadata:favourite:itemtype',
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'itemid' => 'privacy:metadata:favourite:itemid',
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'ordering' => 'privacy:metadata:favourite:ordering',
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'timecreated' => 'privacy:metadata:favourite:timecreated',
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'timemodified' => 'privacy:metadata:favourite:timemodified',
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], 'privacy:metadata:favourite');
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}
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/**
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* Provide a list of contexts which have favourites for the user, in the respective area (component/itemtype combination).
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*
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* This method is to be called by consumers of the favourites subsystem (plugins), in their get_contexts_for_userid() method,
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* to add the contexts for items which may have been favourited, but would normally not be reported as having user data by the
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* plugin responsible for them.
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*
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* Consider an example: Favourite courses.
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* Favourite courses will be handled by the core_course subsystem and courses can be favourited at site context.
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*
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* Now normally, the course provider method get_contexts_for_userid() would report the context of any courses the user is in.
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* Then, we'd export data for those contexts. This won't include courses the user has favourited, but is not a member of.
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*
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* To report the full list, the course provider needs to be made aware of the contexts of any courses the user may have marked
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* as favourites. Course will need to ask th favourites subsystem for this - a call to add_contexts_for_userid($userid).
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*
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* Once called, if a course has been marked as a favourite, at site context, then we'd return the site context. During export,
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* the consumer (course), just looks at all contexts and decides whether to export favourite courses for each one.
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*
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* @param \core_privacy\local\request\contextlist $contextlist
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* @param int $userid The id of the user in scope.
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* @param string $component the frankenstyle component name.
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* @param string $itemtype the type of the favourited items.
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*/
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public static function add_contexts_for_userid(\core_privacy\local\request\contextlist $contextlist, int $userid,
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string $component, string $itemtype = null) {
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$sql = "SELECT contextid
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FROM {favourite} f
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WHERE userid = :userid
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AND component = :component";
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$params = ['userid' => $userid, 'component' => $component];
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if (!is_null($itemtype)) {
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$sql .= " AND itemtype = :itemtype";
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$params['itemtype'] = $itemtype;
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}
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$contextlist->add_from_sql($sql, $params);
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}
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/**
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* Add users to a userlist who have favourites within the specified context.
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*
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* @param \core_privacy\local\request\userlist $userlist The userlist to add the users to.
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* @param string $itemtype the type of the favourited items.
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* @return void
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*/
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public static function add_userids_for_context(\core_privacy\local\request\userlist $userlist,
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string $itemtype = null) {
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if (empty($userlist)) {
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return;
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}
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$params = [
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'contextid' => $userlist->get_context()->id,
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'component' => $userlist->get_component()
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];
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$sql = "SELECT userid
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FROM {favourite}
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WHERE contextid = :contextid
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AND component = :component";
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if (!is_null($itemtype)) {
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$sql .= " AND itemtype = :itemtype";
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$params['itemtype'] = $itemtype;
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}
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$userlist->add_from_sql('userid', $sql, $params);
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}
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/**
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* Get favourites data for the specified user in the specified component, item type and item ID.
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*
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* @param int $userid The id of the user in scope.
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* @param \context $context The context to which data is scoped.
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* @param string $component The favourite's component name.
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* @param string $itemtype The favourite's item type.
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* @param int $itemid The favourite's item ID.
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* @return array|null
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*/
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public static function get_favourites_info_for_user(int $userid, \context $context,
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string $component, string $itemtype, int $itemid) {
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global $DB;
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$params = [
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'userid' => $userid,
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'component' => $component,
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'itemtype' => $itemtype,
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'itemid' => $itemid,
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'contextid' => $context->id
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];
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if (!$favourited = $DB->get_record('favourite', $params)) {
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return;
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}
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return [
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'starred' => transform::yesno(true),
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'ordering' => $favourited->ordering,
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'timecreated' => transform::datetime($favourited->timecreated),
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'timemodified' => transform::datetime($favourited->timemodified)
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];
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}
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/**
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* Delete all favourites for all users in the specified contexts, and component area.
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*
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* @param \context $context The context to which deletion is scoped.
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* @param string $component The favourite's component name.
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* @param string $itemtype The favourite's itemtype.
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* @param int $itemid Optional itemid associated with component.
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* @throws \dml_exception if any errors are encountered during deletion.
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*/
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public static function delete_favourites_for_all_users(\context $context, string $component, string $itemtype,
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int $itemid = 0) {
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global $DB;
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$params = [
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'component' => $component,
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'itemtype' => $itemtype,
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'contextid' => $context->id
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];
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$select = "component = :component AND itemtype =:itemtype AND contextid = :contextid";
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if (!empty($itemid)) {
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$select .= " AND itemid = :itemid";
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$params['itemid'] = $itemid;
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}
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$DB->delete_records_select('favourite', $select, $params);
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}
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/**
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* Delete all favourites for the specified users in the specified context, component area and item type.
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*
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* @param \core_privacy\local\request\approved_userlist $userlist The approved contexts and user information
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* to delete information for.
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* @param string $itemtype The favourite's itemtype.
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* @param int $itemid Optional itemid associated with component.
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* @throws \dml_exception if any errors are encountered during deletion.
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*/
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public static function delete_favourites_for_userlist(\core_privacy\local\request\approved_userlist $userlist,
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string $itemtype, int $itemid = 0) {
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global $DB;
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$userids = $userlist->get_userids();
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if (empty($userids)) {
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return;
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}
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$context = $userlist->get_context();
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list($usersql, $userparams) = $DB->get_in_or_equal($userids, SQL_PARAMS_NAMED);
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$params = [
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'component' => $userlist->get_component(),
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'itemtype' => $itemtype,
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'contextid' => $context->id
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];
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$params += $userparams;
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$select = "component = :component AND itemtype = :itemtype AND contextid = :contextid AND userid $usersql";
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if (!empty($itemid)) {
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$select .= " AND itemid = :itemid";
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$params['itemid'] = $itemid;
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}
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$DB->delete_records_select('favourite', $select, $params);
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}
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/**
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* Delete all favourites for the specified user, in the specified contexts.
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*
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* @param approved_contextlist $contextlist The approved contexts and user information to delete information for.
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* @param string $component The favourite's component name.
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* @param string $itemtype The favourite's itemtype.
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* @param int $itemid Optional itemid associated with component.
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* @throws \coding_exception
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* @throws \dml_exception
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*/
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public static function delete_favourites_for_user(approved_contextlist $contextlist, string $component, string $itemtype,
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int $itemid = 0) {
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global $DB;
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$userid = $contextlist->get_user()->id;
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list($insql, $inparams) = $DB->get_in_or_equal($contextlist->get_contextids(), SQL_PARAMS_NAMED);
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$params = [
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'userid' => $userid,
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'component' => $component,
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'itemtype' => $itemtype,
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];
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$params += $inparams;
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$select = "userid = :userid AND component = :component AND itemtype =:itemtype AND contextid $insql";
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if (!empty($itemid)) {
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$select .= " AND itemid = :itemid";
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$params['itemid'] = $itemid;
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}
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$DB->delete_records_select('favourite', $select, $params);
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}
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}
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