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MDL-62357 enrol_cohort: Add privacy implementation for enrol_cohort
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cescobedo committed May 14, 2018
1 parent 374387c commit 112aa66
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Showing 3 changed files with 338 additions and 8 deletions.
92 changes: 85 additions & 7 deletions enrol/cohort/classes/privacy/provider.php
Expand Up @@ -22,20 +22,98 @@
*/
namespace enrol_cohort\privacy;
defined('MOODLE_INTERNAL') || die();
use \core_privacy\local\metadata\collection;
use \core_privacy\local\request\contextlist;
use \core_privacy\local\request\approved_contextlist;

/**
* Privacy Subsystem for enrol_cohort implementing null_provider.
* Privacy provider for enrol_cohort.
*
* @copyright 2018 Carlos Escobedo <carlos@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class provider implements \core_privacy\local\metadata\null_provider {
class provider implements
\core_privacy\local\metadata\provider,
\core_privacy\local\request\plugin\provider {
/**
* Get the language string identifier with the component's language
* file to explain why this plugin stores no data.
* Returns meta data about this system.
*
* @return string
* @param collection $collection The initialised item collection to add items to.
* @return collection A listing of user data stored through this system.
*/
public static function get_reason() {
return 'privacy:metadata';
public static function get_metadata(collection $collection) {

$collection->add_subsystem_link('core_group', [], 'privacy:metadata:core_group');
return $collection;
}
/**
* Get the list of contexts that contain user information for the specified user.
*
* @param int $userid The user to search.
* @return contextlist $contextlist The contextlist containing the list of contexts used in this plugin.
*/
public static function get_contexts_for_userid($userid) {
$contextlist = new contextlist();

$sql = "SELECT ctx.id
FROM {groups_members} gm
JOIN {groups} g ON gm.groupid = g.id
JOIN {context} ctx ON g.courseid = ctx.instanceid AND ctx.contextlevel = :contextlevel
WHERE gm.userid = :userid
AND gm.component = 'enrol_cohort'";

$params = [
'contextlevel' => CONTEXT_COURSE,
'userid' => $userid
];

$contextlist->add_from_sql($sql, $params);

return $contextlist;
}
/**
* 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 $contextlist) {
if (empty($contextlist)) {
return;
}
foreach ($contextlist as $context) {
if ($context->contextlevel == CONTEXT_COURSE) {
\core_group\privacy\provider::export_groups(
$context,
'enrol_cohort',
[get_string('pluginname', 'enrol_cohort')]
);
}
}
}

/**
* 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 $context) {
if (empty($context)) {
return;
}
if ($context->contextlevel == CONTEXT_COURSE) {
// Delete all the associated groups.
\core_group\privacy\provider::delete_groups_for_all_users($context, 'enrol_cohort');
}
}
/**
* 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 $contextlist) {
if (empty($contextlist->count())) {
return;
}
\core_group\privacy\provider::delete_groups_for_user($contextlist, 'enrol_cohort');
}
}
2 changes: 1 addition & 1 deletion enrol/cohort/lang/en/enrol_cohort.php
Expand Up @@ -32,4 +32,4 @@
$string['pluginname_desc'] = 'Cohort enrolment plugin synchronises cohort members with course participants.';
$string['status'] = 'Active';
$string['creategroup'] = 'Create new group';
$string['privacy:metadata'] = 'The Cohort sync enrolment plugin does not store any personal data.';
$string['privacy:metadata:core_group'] = 'Enrol cohort plugin can create a new group or use an existing group to add all the members of the cohort.';
252 changes: 252 additions & 0 deletions enrol/cohort/tests/privacy_test.php
@@ -0,0 +1,252 @@
<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Base class for unit tests for enrol_cohort.
*
* @package enrol_cohort
* @category test
* @copyright 2018 Carlos Escobedo <carlos@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
use \core_privacy\local\request\writer;
use \core_privacy\local\request\approved_contextlist;
use \enrol_cohort\privacy\provider;
/**
* Unit tests for the enrol_cohort implementation of the privacy API.
*
* @copyright 2018 Carlos Escobedo <carlos@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class enrol_cohort_privacy_testcase extends \core_privacy\tests\provider_testcase {
/**
* Test getting the context for the user ID related to this plugin.
*/
public function test_get_contexts_for_userid() {
global $DB;

$this->resetAfterTest();
$trace = new null_progress_trace();

$cohortplugin = enrol_get_plugin('cohort');
$user1 = $this->getDataGenerator()->create_user();
$cat1 = $this->getDataGenerator()->create_category();
$course1 = $this->getDataGenerator()->create_course(array('category' => $cat1->id));
$group1 = $this->getDataGenerator()->create_group(array('courseid' => $course1->id));
$studentrole = $DB->get_record('role', array('shortname' => 'student'));
$cohort1 = $this->getDataGenerator()->create_cohort(
array('contextid' => context_coursecat::instance($cat1->id)->id));
$cohortplugin->add_instance($course1, array(
'customint1' => $cohort1->id,
'roleid' => $studentrole->id,
'customint2' => $group1->id)
);

cohort_add_member($cohort1->id, $user1->id);
enrol_cohort_sync($trace, $course1->id);
// Check if user1 is enrolled into course1 in group 1.
$this->assertEquals(1, $DB->count_records('role_assignments', array()));
$this->assertTrue($DB->record_exists('groups_members', array(
'groupid' => $group1->id,
'userid' => $user1->id,
'component' => 'enrol_cohort')
));
// Check context course fro provider to user1.
$context = \context_course::instance($course1->id);
$contextlist = provider::get_contexts_for_userid($user1->id);
$this->assertEquals($context->id, $contextlist->current()->id);
}

/**
* Test that user data is exported correctly.
*/
public function test_export_user_data() {
global $DB;

$this->resetAfterTest();
$trace = new null_progress_trace();

$cohortplugin = enrol_get_plugin('cohort');
$user1 = $this->getDataGenerator()->create_user();
$cat1 = $this->getDataGenerator()->create_category();
$course1 = $this->getDataGenerator()->create_course(array('category' => $cat1->id));
$group1 = $this->getDataGenerator()->create_group(array('courseid' => $course1->id));
$studentrole = $DB->get_record('role', array('shortname' => 'student'));
$cohort1 = $this->getDataGenerator()->create_cohort(
array('contextid' => context_coursecat::instance($cat1->id)->id));
$cohortplugin->add_instance($course1, array(
'customint1' => $cohort1->id,
'roleid' => $studentrole->id,
'customint2' => $group1->id)
);

cohort_add_member($cohort1->id, $user1->id);
enrol_cohort_sync($trace, $course1->id);
// Check if user1 is enrolled into course1 in group 1.
$this->assertEquals(1, $DB->count_records('role_assignments', array()));
$this->assertTrue($DB->record_exists('groups_members', array(
'groupid' => $group1->id,
'userid' => $user1->id,
'component' => 'enrol_cohort')
));

$this->setUser($user1);
$contextlist = provider::get_contexts_for_userid($user1->id);
$approvedcontextlist = new approved_contextlist($user1, 'enrol_cohort', $contextlist->get_contextids());
provider::export_user_data($approvedcontextlist);
foreach ($contextlist as $context) {
$writer = writer::with_context($context);
$data = $writer->get_data([
get_string('pluginname', 'enrol_cohort'),
get_string('groups', 'core_group')
]);
$this->assertTrue($writer->has_any_data());
if ($context->contextlevel == CONTEXT_COURSE) {
$exportedgroups = $data->groups;
// User1 only belongs to group1 via enrol_cohort.
$this->assertCount(1, $exportedgroups);
$exportedgroup = reset($exportedgroups);
$this->assertEquals($group1->name, $exportedgroup->name);
}
}
}
/**
* Test for provider::delete_data_for_all_users_in_context().
*/
public function test_delete_data_for_all_users_in_context() {
global $DB;

$this->resetAfterTest();
$trace = new null_progress_trace();

$cohortplugin = enrol_get_plugin('cohort');
$user1 = $this->getDataGenerator()->create_user();
$user2 = $this->getDataGenerator()->create_user();
$user3 = $this->getDataGenerator()->create_user();
$cat1 = $this->getDataGenerator()->create_category();
$course1 = $this->getDataGenerator()->create_course(array('category' => $cat1->id));
$group1 = $this->getDataGenerator()->create_group(array('courseid' => $course1->id));
$studentrole = $DB->get_record('role', array('shortname' => 'student'));
$cohort1 = $this->getDataGenerator()->create_cohort(
array('contextid' => context_coursecat::instance($cat1->id)->id));
$cohortplugin->add_instance($course1, array(
'customint1' => $cohort1->id,
'roleid' => $studentrole->id,
'customint2' => $group1->id)
);

cohort_add_member($cohort1->id, $user1->id);
cohort_add_member($cohort1->id, $user2->id);
cohort_add_member($cohort1->id, $user3->id);
enrol_cohort_sync($trace, $course1->id);
$this->assertEquals(
3,
$DB->count_records_sql("SELECT COUNT(gm.id)
FROM {groups_members} gm
JOIN {groups} g ON gm.groupid = g.id
WHERE g.courseid = ?", [$course1->id])
);

$coursecontext1 = context_course::instance($course1->id);
provider::delete_data_for_all_users_in_context($coursecontext1);
$this->assertEquals(
0,
$DB->count_records_sql("SELECT COUNT(gm.id)
FROM {groups_members} gm
JOIN {groups} g ON gm.groupid = g.id
WHERE g.courseid = ?", [$course1->id])
);
}
/**
* Test for provider::delete_data_for_user().
*/
public function test_delete_data_for_user() {
global $DB;

$this->resetAfterTest();
$trace = new null_progress_trace();

$cohortplugin = enrol_get_plugin('cohort');
$user1 = $this->getDataGenerator()->create_user();
$user2 = $this->getDataGenerator()->create_user();
$user3 = $this->getDataGenerator()->create_user();
$cat1 = $this->getDataGenerator()->create_category();
$course1 = $this->getDataGenerator()->create_course(array('category' => $cat1->id));
$course2 = $this->getDataGenerator()->create_course(array('category' => $cat1->id));
$group1 = $this->getDataGenerator()->create_group(array('courseid' => $course1->id));
$group2 = $this->getDataGenerator()->create_group(array('courseid' => $course2->id));
$studentrole = $DB->get_record('role', array('shortname' => 'student'));
$cohort1 = $this->getDataGenerator()->create_cohort(
array('contextid' => context_coursecat::instance($cat1->id)->id));
$cohortplugin->add_instance($course1, array(
'customint1' => $cohort1->id,
'roleid' => $studentrole->id,
'customint2' => $group1->id)
);
$cohortplugin->add_instance($course2, array(
'customint1' => $cohort1->id,
'roleid' => $studentrole->id,
'customint2' => $group2->id)
);

$this->getDataGenerator()->enrol_user($user2->id, $course1->id);
$this->getDataGenerator()->enrol_user($user3->id, $course1->id);
$this->getDataGenerator()->create_group_member(array('groupid' => $group1->id, 'userid' => $user2->id));
$this->getDataGenerator()->create_group_member(array('groupid' => $group1->id, 'userid' => $user3->id));

cohort_add_member($cohort1->id, $user1->id);
enrol_cohort_sync($trace, $course1->id);

$this->assertEquals(
3,
$DB->count_records_sql("SELECT COUNT(gm.id)
FROM {groups_members} gm
JOIN {groups} g ON gm.groupid = g.id
WHERE g.courseid = ?", [$course1->id])
);

$this->assertEquals(
1,
$DB->count_records_sql("SELECT COUNT(gm.id)
FROM {groups_members} gm
JOIN {groups} g ON gm.groupid = g.id
WHERE g.courseid = ?", [$course2->id])
);

$this->setUser($user1);
$coursecontext1 = context_course::instance($course1->id);
$coursecontext2 = context_course::instance($course2->id);
$approvedcontextlist = new \core_privacy\tests\request\approved_contextlist($user1, 'enrol_cohort',
[$coursecontext1->id, $coursecontext2->id]);
provider::delete_data_for_user($approvedcontextlist);
// Check we have 2 users in groups because we are deleted user1.
$this->assertEquals(
2,
$DB->count_records_sql("SELECT COUNT(gm.id)
FROM {groups_members} gm
JOIN {groups} g ON gm.groupid = g.id
WHERE g.courseid = ?", [$course1->id])
);
// Check we have not users in groups.
$this->assertEquals(
0,
$DB->count_records_sql("SELECT COUNT(gm.id)
FROM {groups_members} gm
JOIN {groups} g ON gm.groupid = g.id
WHERE g.courseid = ?", [$course2->id])
);
}
}

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