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David Monllao
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Merge branch 'MDL-61943-34' of git://github.com/cescobedo/moodle into MOODLE_34_STABLE
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‎admin/roles/classes/privacy/provider.php‎

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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 Subsystem implementation for core_role.
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*
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* @package core_role
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* @copyright 2018 Carlos Escobedo <carlos@moodle.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_role\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\contextlist;
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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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use \core_privacy\local\request\writer;
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/**
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* Privacy provider for core_role.
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*
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* @copyright 2018 Carlos Escobedo <carlos@moodle.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\provider,
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\core_privacy\local\request\subsystem\plugin_provider,
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\core_privacy\local\request\user_preference_provider {
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/**
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* Get information about the user data stored by this plugin.
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*
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* @param collection $collection An object for storing metadata.
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* @return collection The metadata.
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*/
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public static function get_metadata(collection $collection) : collection {
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$rolecapabilities = [
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'roleid' => 'privacy:metadata:role_capabilities:roleid',
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'capability' => 'privacy:metadata:role_capabilities:capability',
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'permission' => 'privacy:metadata:role_capabilities:permission',
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'timemodified' => 'privacy:metadata:role_capabilities:timemodified',
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'modifierid' => 'privacy:metadata:role_capabilities:modifierid'
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];
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$roleassignments = [
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'roleid' => 'privacy:metadata:role_assignments:roleid',
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'userid' => 'privacy:metadata:role_assignments:userid',
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'timemodified' => 'privacy:metadata:role_assignments:timemodified',
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'modifierid' => 'privacy:metadata:role_assignments:modifierid',
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'component' => 'privacy:metadata:role_assignments:component',
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'itemid' => 'privacy:metadata:role_assignments:itemid'
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];
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$collection->add_database_table('role_capabilities', $rolecapabilities,
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'privacy:metadata:role_capabilities:tableexplanation');
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$collection->add_database_table('role_assignments', $roleassignments,
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'privacy:metadata:role_assignments:tableexplanation');
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$collection->add_user_preference('definerole_showadvanced',
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'privacy:metadata:preference:showadvanced');
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return $collection;
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}
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/**
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* Export all user preferences for the plugin.
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*
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* @param int $userid The userid of the user whose data is to be exported.
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*/
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public static function export_user_preferences(int $userid) {
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$showadvanced = get_user_preferences('definerole_showadvanced', null, $userid);
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if ($showadvanced !== null) {
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writer::export_user_preference('core_role',
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'definerole_showadvanced',
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transform::yesno($showadvanced),
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get_string('privacy:metadata:preference:showadvanced', 'core_role')
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);
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}
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}
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/**
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* Return all contexts for this userid.
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*
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* @param int $userid The user ID.
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* @return contextlist The list of context IDs.
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*/
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public static function get_contexts_for_userid(int $userid) : contextlist {
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global $DB;
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$contextlist = new contextlist();
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// The role_capabilities table contains user data.
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$contexts = [
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CONTEXT_SYSTEM,
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CONTEXT_USER,
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CONTEXT_COURSECAT,
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CONTEXT_COURSE,
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CONTEXT_MODULE,
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CONTEXT_BLOCK
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];
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list($insql, $inparams) = $DB->get_in_or_equal($contexts, SQL_PARAMS_NAMED);
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$sql = "SELECT ctx.id
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FROM {context} ctx
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JOIN {role_capabilities} rc
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ON rc.contextid = ctx.id
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AND ((ctx.contextlevel {$insql} AND rc.modifierid = :modifierid)
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OR (ctx.contextlevel = :contextlevel AND ctx.instanceid = :userid))";
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$params = [
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'modifierid' => $userid,
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'contextlevel' => CONTEXT_USER,
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'userid' => $userid
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];
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$params += $inparams;
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$contextlist->add_from_sql($sql, $params);
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// The role_assignments table contains user data.
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$contexts = [
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CONTEXT_SYSTEM,
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CONTEXT_USER,
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CONTEXT_COURSECAT,
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CONTEXT_COURSE,
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CONTEXT_MODULE,
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CONTEXT_BLOCK
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];
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list($insql, $inparams) = $DB->get_in_or_equal($contexts, SQL_PARAMS_NAMED);
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$params = [
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'userid' => $userid,
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'modifierid' => $userid
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];
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$params += $inparams;
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$sql = "SELECT ctx.id
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FROM {role_assignments} ra
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JOIN {context} ctx
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ON ctx.id = ra.contextid
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AND ctx.contextlevel {$insql}
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WHERE (ra.userid = :userid
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OR ra.modifierid = :modifierid)
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AND ra.component != 'tool_cohortroles'";
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$contextlist->add_from_sql($sql, $params);
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return $contextlist;
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}
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/**
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* Export all user data for the specified user, in the specified contexts.
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*
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* @param approved_contextlist $contextlist The list of approved contexts for a user.
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*/
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public static function export_user_data(approved_contextlist $contextlist) {
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global $DB;
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if (empty($contextlist)) {
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return;
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}
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$rolesnames = self::get_roles_name();
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$userid = $contextlist->get_user()->id;
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$ctxfields = \context_helper::get_preload_record_columns_sql('ctx');
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list($insql, $inparams) = $DB->get_in_or_equal($contextlist->get_contextids(), SQL_PARAMS_NAMED);
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// Role Assignments export data.
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$contexts = [
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CONTEXT_SYSTEM,
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CONTEXT_USER,
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CONTEXT_COURSECAT,
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CONTEXT_COURSE,
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CONTEXT_MODULE,
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CONTEXT_BLOCK
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];
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list($inctxsql, $ctxparams) = $DB->get_in_or_equal($contexts, SQL_PARAMS_NAMED);
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$sql = "SELECT ra.id, ra.contextid, ra.roleid, ra.userid, ra.timemodified, ra.modifierid, $ctxfields
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FROM {role_assignments} ra
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JOIN {context} ctx
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ON ctx.id = ra.contextid
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AND ctx.contextlevel {$inctxsql}
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AND (ra.userid = :userid OR ra.modifierid = :modifierid)
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AND ra.component != 'tool_cohortroles'
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JOIN {role} r
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ON r.id = ra.roleid
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WHERE ctx.id {$insql}";
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$params = ['userid' => $userid, 'modifierid' => $userid];
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$params += $inparams;
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$params += $ctxparams;
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$assignments = $DB->get_recordset_sql($sql, $params);
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foreach ($assignments as $assignment) {
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\context_helper::preload_from_record($assignment);
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$alldata[$assignment->contextid][$rolesnames[$assignment->roleid]][] = (object)[
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'timemodified' => transform::datetime($assignment->timemodified),
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'userid' => transform::user($assignment->userid),
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'modifierid' => transform::user($assignment->modifierid)
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];
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}
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$assignments->close();
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if (!empty($alldata)) {
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array_walk($alldata, function($roledata, $contextid) {
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$context = \context::instance_by_id($contextid);
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array_walk($roledata, function($data, $rolename) use ($context) {
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writer::with_context($context)->export_data(
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[get_string('privacy:metadata:role_assignments', 'core_role'), $rolename],
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(object)$data);
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});
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});
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unset($alldata);
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}
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// Role Capabilities export data.
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$strpermissions = self::get_permissions_name();
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$contexts = [
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CONTEXT_SYSTEM,
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CONTEXT_USER,
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CONTEXT_COURSECAT,
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CONTEXT_COURSE,
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CONTEXT_MODULE,
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CONTEXT_BLOCK
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];
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list($inctxsql, $ctxparams) = $DB->get_in_or_equal($contexts, SQL_PARAMS_NAMED);
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$sql = "SELECT rc.id, rc.contextid, rc.capability, rc.permission, rc.timemodified, rc.roleid, $ctxfields
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FROM {context} ctx
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JOIN {role_capabilities} rc
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ON rc.contextid = ctx.id
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AND ((ctx.contextlevel {$inctxsql} AND rc.modifierid = :modifierid)
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OR (ctx.contextlevel = :contextlevel AND ctx.instanceid = :userid))
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WHERE ctx.id {$insql}";
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$params = [
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'modifierid' => $userid,
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'contextlevel' => CONTEXT_USER,
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'userid' => $userid
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];
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$params += $inparams;
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$params += $ctxparams;
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$capabilities = $DB->get_recordset_sql($sql, $params);
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foreach ($capabilities as $capability) {
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\context_helper::preload_from_record($capability);
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$alldata[$capability->contextid][$rolesnames[$capability->roleid]][] = (object)[
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'timemodified' => transform::datetime($capability->timemodified),
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'capability' => $capability->capability,
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'permission' => $strpermissions[$capability->permission]
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];
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}
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$capabilities->close();
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if (!empty($alldata)) {
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array_walk($alldata, function($capdata, $contextid) {
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$context = \context::instance_by_id($contextid);
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array_walk($capdata, function($data, $rolename) use ($context) {
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writer::with_context($context)->export_data(
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[get_string('privacy:metadata:role_capabilities', 'core_role'), $rolename],
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(object)$data);
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});
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});
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}
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}
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/**
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* Exports the data relating to tool_cohortroles component on role assignments by
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* Assign user roles to cohort feature.
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*
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* @param int $userid The user ID.
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*/
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public static function export_user_role_to_cohort(int $userid) {
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global $DB;
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$rolesnames = self::get_roles_name();
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$sql = "SELECT ra.id, ra.contextid, ra.roleid, ra.userid, ra.timemodified, ra.modifierid, r.id as roleid
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FROM {role_assignments} ra
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JOIN {context} ctx
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ON ctx.id = ra.contextid
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AND ctx.contextlevel = :contextlevel
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AND ra.component = 'tool_cohortroles'
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JOIN {role} r
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ON r.id = ra.roleid
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WHERE ctx.instanceid = :instanceid
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OR ra.userid = :userid";
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$params = ['userid' => $userid, 'instanceid' => $userid, 'contextlevel' => CONTEXT_USER];
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$assignments = $DB->get_recordset_sql($sql, $params);
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foreach ($assignments as $assignment) {
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$alldata[$assignment->contextid][$rolesnames[$assignment->roleid]][] = (object)[
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'timemodified' => transform::datetime($assignment->timemodified),
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'userid' => transform::user($assignment->userid),
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'modifierid' => transform::user($assignment->modifierid)
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];
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}
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$assignments->close();
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if (!empty($alldata)) {
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array_walk($alldata, function($roledata, $contextid) {
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$context = \context::instance_by_id($contextid);
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array_walk($roledata, function($data, $rolename) use ($context) {
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writer::with_context($context)->export_related_data(
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[get_string('privacy:metadata:role_cohortroles', 'core_role'), $rolename], 'cohortroles',
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(object)$data);
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});
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});
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}
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}
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/**
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* Delete all user data for this context.
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*
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* @param \context $context The context to delete data for.
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*/
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public static function delete_data_for_all_users_in_context(\context $context) {
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global $DB;
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// Don't remove data from role_capabilities.
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// Because this data affects the whole Moodle, there are override capabilities.
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// Don't belong to the modifier user.
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// Remove data from role_assignments.
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if (empty($context)) {
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return;
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}
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$DB->delete_records('role_assignments', ['contextid' => $context->id]);
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}
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/**
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* Delete all user data for this user only.
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*
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* @param approved_contextlist $contextlist The list of approved contexts for a user.
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*/
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public static function delete_data_for_user(approved_contextlist $contextlist) {
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global $DB;
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// Don't remove data from role_capabilities.
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// Because this data affects the whole Moodle, there are override capabilities.
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// Don't belong to the modifier user.
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// Remove data from role_assignments.
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if (empty($contextlist->count())) {
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return;
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}
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$userid = $contextlist->get_user()->id;
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foreach ($contextlist->get_contexts() as $context) {
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// Only delete the roles assignments where the user is assigned in all contexts.
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$DB->delete_records('role_assignments', ['userid' => $userid, 'contextid' => $context->id]);
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}
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}
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/**
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* Delete user entries in role_assignments related to the feature
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* Assign user roles to cohort feature.
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*
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* @param int $userid The user ID.
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*/
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public static function delete_user_role_to_cohort(int $userid) {
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global $DB;
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// Delete entries where userid is a mentor by tool_cohortroles.
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$DB->delete_records('role_assignments', ['userid' => $userid, 'component' => 'tool_cohortroles']);
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}
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/**
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* Get all the localised roles name in a simple array.
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*
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* @return array Array of name of the roles by roleid.
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*/
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protected static function get_roles_name() {
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$roles = role_fix_names(get_all_roles(), \context_system::instance(), ROLENAME_ORIGINAL);
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$rolesnames = array();
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foreach ($roles as $role) {
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$rolesnames[$role->id] = $role->localname;
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}
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return $rolesnames;
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}
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/**
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* Get all the permissions name in a simple array.
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*
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* @return array Array of permissions name.
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*/
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protected static function get_permissions_name() {
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$strpermissions = array(
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CAP_INHERIT => get_string('inherit', 'role'),
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CAP_ALLOW => get_string('allow', 'role'),
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CAP_PREVENT => get_string('prevent', 'role'),
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CAP_PROHIBIT => get_string('prohibit', 'role')
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);
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return $strpermissions;
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}
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}

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