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<?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/>.
/**
* External course participation api.
*
* This api is mostly read only, the actual enrol and unenrol
* support is in each enrol plugin.
*
* @package core_enrol
* @category external
* @copyright 2010 Jerome Mouneyrac
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
require_once("$CFG->libdir/externallib.php");
/**
* Enrol external functions
*
* @package core_enrol
* @category external
* @copyright 2011 Jerome Mouneyrac
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.2
*/
class core_enrol_external extends external_api {
/**
* Returns description of method parameters
*
* @return external_function_parameters
* @since Moodle 2.4
*/
public static function get_enrolled_users_with_capability_parameters() {
return new external_function_parameters(
array (
'coursecapabilities' => new external_multiple_structure(
new external_single_structure(
array (
'courseid' => new external_value(PARAM_INT, 'Course ID number in the Moodle course table'),
'capabilities' => new external_multiple_structure(
new external_value(PARAM_CAPABILITY, 'Capability name, such as mod/forum:viewdiscussion')),
)
)
, 'course id and associated capability name'),
'options' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'option name'),
'value' => new external_value(PARAM_RAW, 'option value')
)
), 'Option names:
* groupid (integer) return only users in this group id. Requires \'moodle/site:accessallgroups\' .
* onlyactive (integer) only users with active enrolments. Requires \'moodle/course:enrolreview\' .
* userfields (\'string, string, ...\') return only the values of these user fields.
* limitfrom (integer) sql limit from.
* limitnumber (integer) max number of users per course and capability.', VALUE_DEFAULT, array())
)
);
}
/**
* Return users that have the capabilities for each course specified. For each course and capability specified,
* a list of the users that are enrolled in the course and have that capability are returned.
*
* @param array $coursecapabilities array of course ids and associated capability names {courseid, {capabilities}}
* @return array An array of arrays describing users for each associated courseid and capability
* @since Moodle 2.4
*/
public static function get_enrolled_users_with_capability($coursecapabilities, $options) {
global $CFG, $DB;
require_once($CFG->dirroot . '/course/lib.php');
require_once($CFG->dirroot . "/user/lib.php");
if (empty($coursecapabilities)) {
throw new invalid_parameter_exception('Parameter can not be empty');
}
$params = self::validate_parameters(self::get_enrolled_users_with_capability_parameters(),
array ('coursecapabilities' => $coursecapabilities, 'options'=>$options));
$result = array();
$userlist = array();
$groupid = 0;
$onlyactive = false;
$userfields = array();
$limitfrom = 0;
$limitnumber = 0;
foreach ($params['options'] as $option) {
switch ($option['name']) {
case 'groupid':
$groupid = (int)$option['value'];
break;
case 'onlyactive':
$onlyactive = !empty($option['value']);
break;
case 'userfields':
$thefields = explode(',', $option['value']);
foreach ($thefields as $f) {
$userfields[] = clean_param($f, PARAM_ALPHANUMEXT);
}
break;
case 'limitfrom' :
$limitfrom = clean_param($option['value'], PARAM_INT);
break;
case 'limitnumber' :
$limitnumber = clean_param($option['value'], PARAM_INT);
break;
}
}
foreach ($params['coursecapabilities'] as $coursecapability) {
$courseid = $coursecapability['courseid'];
$course = $DB->get_record('course', array('id'=>$courseid), '*', MUST_EXIST);
$coursecontext = context_course::instance($courseid);
if (!$coursecontext) {
throw new moodle_exception('cannotfindcourse', 'error', '', null,
'The course id ' . $courseid . ' doesn\'t exist.');
}
if ($courseid == SITEID) {
$context = context_system::instance();
} else {
$context = $coursecontext;
}
try {
self::validate_context($context);
} catch (Exception $e) {
$exceptionparam = new stdClass();
$exceptionparam->message = $e->getMessage();
$exceptionparam->courseid = $params['courseid'];
throw new moodle_exception(get_string('errorcoursecontextnotvalid' , 'webservice', $exceptionparam));
}
course_require_view_participants($context);
// The accessallgroups capability is needed to use this option.
if (!empty($groupid) && groups_is_member($groupid)) {
require_capability('moodle/site:accessallgroups', $coursecontext);
}
// The course:enrolereview capability is needed to use this option.
if ($onlyactive) {
require_capability('moodle/course:enrolreview', $coursecontext);
}
// To see the permissions of others role:review capability is required.
require_capability('moodle/role:review', $coursecontext);
foreach ($coursecapability['capabilities'] as $capability) {
$courseusers['courseid'] = $courseid;
$courseusers['capability'] = $capability;
list($enrolledsql, $enrolledparams) = get_enrolled_sql($coursecontext, $capability, $groupid, $onlyactive);
$enrolledparams['courseid'] = $courseid;
$sql = "SELECT u.*, COALESCE(ul.timeaccess, 0) AS lastcourseaccess
FROM {user} u
LEFT JOIN {user_lastaccess} ul ON (ul.userid = u.id AND ul.courseid = :courseid)
WHERE u.id IN ($enrolledsql)
ORDER BY u.id ASC";
$enrolledusers = $DB->get_recordset_sql($sql, $enrolledparams, $limitfrom, $limitnumber);
$users = array();
foreach ($enrolledusers as $courseuser) {
if ($userdetails = user_get_user_details($courseuser, $course, $userfields)) {
$users[] = $userdetails;
}
}
$enrolledusers->close();
$courseusers['users'] = $users;
$result[] = $courseusers;
}
}
return $result;
}
/**
* Returns description of method result value
*
* @return external_multiple_structure
* @since Moodle 2.4
*/
public static function get_enrolled_users_with_capability_returns() {
return new external_multiple_structure( new external_single_structure (
array (
'courseid' => new external_value(PARAM_INT, 'Course ID number in the Moodle course table'),
'capability' => new external_value(PARAM_CAPABILITY, 'Capability name'),
'users' => new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'ID of the user'),
'username' => new external_value(PARAM_RAW, 'Username', VALUE_OPTIONAL),
'firstname' => new external_value(PARAM_NOTAGS, 'The first name(s) of the user', VALUE_OPTIONAL),
'lastname' => new external_value(PARAM_NOTAGS, 'The family name of the user', VALUE_OPTIONAL),
'fullname' => new external_value(PARAM_NOTAGS, 'The fullname of the user'),
'email' => new external_value(PARAM_TEXT, 'Email address', VALUE_OPTIONAL),
'address' => new external_value(PARAM_MULTILANG, 'Postal address', VALUE_OPTIONAL),
'phone1' => new external_value(PARAM_NOTAGS, 'Phone 1', VALUE_OPTIONAL),
'phone2' => new external_value(PARAM_NOTAGS, 'Phone 2', VALUE_OPTIONAL),
'icq' => new external_value(PARAM_NOTAGS, 'icq number', VALUE_OPTIONAL),
'skype' => new external_value(PARAM_NOTAGS, 'skype id', VALUE_OPTIONAL),
'yahoo' => new external_value(PARAM_NOTAGS, 'yahoo id', VALUE_OPTIONAL),
'aim' => new external_value(PARAM_NOTAGS, 'aim id', VALUE_OPTIONAL),
'msn' => new external_value(PARAM_NOTAGS, 'msn number', VALUE_OPTIONAL),
'department' => new external_value(PARAM_TEXT, 'department', VALUE_OPTIONAL),
'institution' => new external_value(PARAM_TEXT, 'institution', VALUE_OPTIONAL),
'interests' => new external_value(PARAM_TEXT, 'user interests (separated by commas)', VALUE_OPTIONAL),
'firstaccess' => new external_value(PARAM_INT, 'first access to the site (0 if never)', VALUE_OPTIONAL),
'lastaccess' => new external_value(PARAM_INT, 'last access to the site (0 if never)', VALUE_OPTIONAL),
'lastcourseaccess' => new external_value(PARAM_INT, 'last access to the course (0 if never)', VALUE_OPTIONAL),
'description' => new external_value(PARAM_RAW, 'User profile description', VALUE_OPTIONAL),
'descriptionformat' => new external_value(PARAM_INT, 'User profile description format', VALUE_OPTIONAL),
'city' => new external_value(PARAM_NOTAGS, 'Home city of the user', VALUE_OPTIONAL),
'url' => new external_value(PARAM_URL, 'URL of the user', VALUE_OPTIONAL),
'country' => new external_value(PARAM_ALPHA, 'Country code of the user, such as AU or CZ', VALUE_OPTIONAL),
'profileimageurlsmall' => new external_value(PARAM_URL, 'User image profile URL - small', VALUE_OPTIONAL),
'profileimageurl' => new external_value(PARAM_URL, 'User image profile URL - big', VALUE_OPTIONAL),
'customfields' => new external_multiple_structure(
new external_single_structure(
array(
'type' => new external_value(PARAM_ALPHANUMEXT, 'The type of the custom field'),
'value' => new external_value(PARAM_RAW, 'The value of the custom field'),
'name' => new external_value(PARAM_RAW, 'The name of the custom field'),
'shortname' => new external_value(PARAM_RAW, 'The shortname of the custom field'),
)
), 'User custom fields (also known as user profil fields)', VALUE_OPTIONAL),
'groups' => new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'group id'),
'name' => new external_value(PARAM_RAW, 'group name'),
'description' => new external_value(PARAM_RAW, 'group description'),
)
), 'user groups', VALUE_OPTIONAL),
'roles' => new external_multiple_structure(
new external_single_structure(
array(
'roleid' => new external_value(PARAM_INT, 'role id'),
'name' => new external_value(PARAM_RAW, 'role name'),
'shortname' => new external_value(PARAM_ALPHANUMEXT, 'role shortname'),
'sortorder' => new external_value(PARAM_INT, 'role sortorder')
)
), 'user roles', VALUE_OPTIONAL),
'preferences' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_RAW, 'The name of the preferences'),
'value' => new external_value(PARAM_RAW, 'The value of the custom field'),
)
), 'User preferences', VALUE_OPTIONAL),
'enrolledcourses' => new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'Id of the course'),
'fullname' => new external_value(PARAM_RAW, 'Fullname of the course'),
'shortname' => new external_value(PARAM_RAW, 'Shortname of the course')
)
), 'Courses where the user is enrolled - limited by which courses the user is able to see', VALUE_OPTIONAL)
)
), 'List of users that are enrolled in the course and have the specified capability'),
)
)
);
}
/**
* Returns description of method parameters
*
* @return external_function_parameters
*/
public static function get_users_courses_parameters() {
return new external_function_parameters(
array(
'userid' => new external_value(PARAM_INT, 'user id'),
'returnusercount' => new external_value(PARAM_BOOL,
'Include count of enrolled users for each course? This can add several seconds to the response time'
. ' if a user is on several large courses, so set this to false if the value will not be used to'
. ' improve performance.',
VALUE_DEFAULT, true),
)
);
}
/**
* Get list of courses user is enrolled in (only active enrolments are returned).
* Please note the current user must be able to access the course, otherwise the course is not included.
*
* @param int $userid
* @param bool $returnusercount
* @return array of courses
*/
public static function get_users_courses($userid, $returnusercount = true) {
global $CFG, $USER, $DB;
require_once($CFG->dirroot . '/course/lib.php');
require_once($CFG->libdir . '/completionlib.php');
// Do basic automatic PARAM checks on incoming data, using params description
// If any problems are found then exceptions are thrown with helpful error messages
$params = self::validate_parameters(self::get_users_courses_parameters(),
['userid' => $userid, 'returnusercount' => $returnusercount]);
$userid = $params['userid'];
$returnusercount = $params['returnusercount'];
$courses = enrol_get_users_courses($userid, true, '*');
$result = array();
// Get user data including last access to courses.
$user = get_complete_user_data('id', $userid);
$sameuser = $USER->id == $userid;
// Retrieve favourited courses (starred).
$favouritecourseids = array();
if ($sameuser) {
$ufservice = \core_favourites\service_factory::get_service_for_user_context(\context_user::instance($userid));
$favourites = $ufservice->find_favourites_by_type('core_course', 'courses');
if ($favourites) {
$favouritecourseids = array_flip(array_map(
function($favourite) {
return $favourite->itemid;
}, $favourites));
}
}
foreach ($courses as $course) {
$context = context_course::instance($course->id, IGNORE_MISSING);
try {
self::validate_context($context);
} catch (Exception $e) {
// current user can not access this course, sorry we can not disclose who is enrolled in this course!
continue;
}
if (!$sameuser and !course_can_view_participants($context)) {
// we need capability to view participants
continue;
}
if ($returnusercount) {
list($enrolledsqlselect, $enrolledparams) = get_enrolled_sql($context);
$enrolledsql = "SELECT COUNT('x') FROM ($enrolledsqlselect) enrolleduserids";
$enrolledusercount = $DB->count_records_sql($enrolledsql, $enrolledparams);
}
$displayname = external_format_string(get_course_display_name_for_list($course), $context->id);
list($course->summary, $course->summaryformat) =
external_format_text($course->summary, $course->summaryformat, $context->id, 'course', 'summary', null);
$course->fullname = external_format_string($course->fullname, $context->id);
$course->shortname = external_format_string($course->shortname, $context->id);
$progress = null;
$completed = null;
$completionhascriteria = false;
$completionusertracked = false;
// Return only private information if the user should be able to see it.
if ($sameuser || completion_can_view_data($userid, $course)) {
if ($course->enablecompletion) {
$completion = new completion_info($course);
$completed = $completion->is_course_complete($userid);
$completionhascriteria = $completion->has_criteria();
$completionusertracked = $completion->is_tracked_user($userid);
$progress = \core_completion\progress::get_course_progress_percentage($course, $userid);
}
}
$lastaccess = null;
// Check if last access is a hidden field.
$hiddenfields = array_flip(explode(',', $CFG->hiddenuserfields));
$canviewlastaccess = $sameuser || !isset($hiddenfields['lastaccess']);
if (!$canviewlastaccess) {
$canviewlastaccess = has_capability('moodle/course:viewhiddenuserfields', $context);
}
if ($canviewlastaccess && isset($user->lastcourseaccess[$course->id])) {
$lastaccess = $user->lastcourseaccess[$course->id];
}
$hidden = false;
if ($sameuser) {
$hidden = boolval(get_user_preferences('block_myoverview_hidden_course_' . $course->id, 0));
}
// Retrieve course overview used files.
$courselist = new core_course_list_element($course);
$overviewfiles = array();
foreach ($courselist->get_course_overviewfiles() as $file) {
$fileurl = moodle_url::make_webservice_pluginfile_url($file->get_contextid(), $file->get_component(),
$file->get_filearea(), null, $file->get_filepath(),
$file->get_filename())->out(false);
$overviewfiles[] = array(
'filename' => $file->get_filename(),
'fileurl' => $fileurl,
'filesize' => $file->get_filesize(),
'filepath' => $file->get_filepath(),
'mimetype' => $file->get_mimetype(),
'timemodified' => $file->get_timemodified(),
);
}
$courseresult = [
'id' => $course->id,
'shortname' => $course->shortname,
'fullname' => $course->fullname,
'displayname' => $displayname,
'idnumber' => $course->idnumber,
'visible' => $course->visible,
'summary' => $course->summary,
'summaryformat' => $course->summaryformat,
'format' => $course->format,
'showgrades' => $course->showgrades,
'lang' => clean_param($course->lang, PARAM_LANG),
'enablecompletion' => $course->enablecompletion,
'completionhascriteria' => $completionhascriteria,
'completionusertracked' => $completionusertracked,
'category' => $course->category,
'progress' => $progress,
'completed' => $completed,
'startdate' => $course->startdate,
'enddate' => $course->enddate,
'marker' => $course->marker,
'lastaccess' => $lastaccess,
'isfavourite' => isset($favouritecourseids[$course->id]),
'hidden' => $hidden,
'overviewfiles' => $overviewfiles,
];
if ($returnusercount) {
$courseresult['enrolledusercount'] = $enrolledusercount;
}
$result[] = $courseresult;
}
return $result;
}
/**
* Returns description of method result value
*
* @return external_description
*/
public static function get_users_courses_returns() {
return new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'id of course'),
'shortname' => new external_value(PARAM_RAW, 'short name of course'),
'fullname' => new external_value(PARAM_RAW, 'long name of course'),
'displayname' => new external_value(PARAM_TEXT, 'course display name for lists.', VALUE_OPTIONAL),
'enrolledusercount' => new external_value(PARAM_INT, 'Number of enrolled users in this course',
VALUE_OPTIONAL),
'idnumber' => new external_value(PARAM_RAW, 'id number of course'),
'visible' => new external_value(PARAM_INT, '1 means visible, 0 means not yet visible course'),
'summary' => new external_value(PARAM_RAW, 'summary', VALUE_OPTIONAL),
'summaryformat' => new external_format_value('summary', VALUE_OPTIONAL),
'format' => new external_value(PARAM_PLUGIN, 'course format: weeks, topics, social, site', VALUE_OPTIONAL),
'showgrades' => new external_value(PARAM_BOOL, 'true if grades are shown, otherwise false', VALUE_OPTIONAL),
'lang' => new external_value(PARAM_LANG, 'forced course language', VALUE_OPTIONAL),
'enablecompletion' => new external_value(PARAM_BOOL, 'true if completion is enabled, otherwise false',
VALUE_OPTIONAL),
'completionhascriteria' => new external_value(PARAM_BOOL, 'If completion criteria is set.', VALUE_OPTIONAL),
'completionusertracked' => new external_value(PARAM_BOOL, 'If the user is completion tracked.', VALUE_OPTIONAL),
'category' => new external_value(PARAM_INT, 'course category id', VALUE_OPTIONAL),
'progress' => new external_value(PARAM_FLOAT, 'Progress percentage', VALUE_OPTIONAL),
'completed' => new external_value(PARAM_BOOL, 'Whether the course is completed.', VALUE_OPTIONAL),
'startdate' => new external_value(PARAM_INT, 'Timestamp when the course start', VALUE_OPTIONAL),
'enddate' => new external_value(PARAM_INT, 'Timestamp when the course end', VALUE_OPTIONAL),
'marker' => new external_value(PARAM_INT, 'Course section marker.', VALUE_OPTIONAL),
'lastaccess' => new external_value(PARAM_INT, 'Last access to the course (timestamp).', VALUE_OPTIONAL),
'isfavourite' => new external_value(PARAM_BOOL, 'If the user marked this course a favourite.', VALUE_OPTIONAL),
'hidden' => new external_value(PARAM_BOOL, 'If the user hide the course from the dashboard.', VALUE_OPTIONAL),
'overviewfiles' => new external_files('Overview files attached to this course.', VALUE_OPTIONAL),
)
)
);
}
/**
* Returns description of method parameters value
*
* @return external_description
*/
public static function get_potential_users_parameters() {
return new external_function_parameters(
array(
'courseid' => new external_value(PARAM_INT, 'course id'),
'enrolid' => new external_value(PARAM_INT, 'enrolment id'),
'search' => new external_value(PARAM_RAW, 'query'),
'searchanywhere' => new external_value(PARAM_BOOL, 'find a match anywhere, or only at the beginning'),
'page' => new external_value(PARAM_INT, 'Page number'),
'perpage' => new external_value(PARAM_INT, 'Number per page'),
)
);
}
/**
* Get potential users.
*
* @param int $courseid Course id
* @param int $enrolid Enrolment id
* @param string $search The query
* @param boolean $searchanywhere Match anywhere in the string
* @param int $page Page number
* @param int $perpage Max per page
* @return array An array of users
*/
public static function get_potential_users($courseid, $enrolid, $search, $searchanywhere, $page, $perpage) {
global $PAGE, $DB, $CFG;
require_once($CFG->dirroot.'/enrol/locallib.php');
require_once($CFG->dirroot.'/user/lib.php');
$params = self::validate_parameters(
self::get_potential_users_parameters(),
array(
'courseid' => $courseid,
'enrolid' => $enrolid,
'search' => $search,
'searchanywhere' => $searchanywhere,
'page' => $page,
'perpage' => $perpage
)
);
$context = context_course::instance($params['courseid']);
try {
self::validate_context($context);
} catch (Exception $e) {
$exceptionparam = new stdClass();
$exceptionparam->message = $e->getMessage();
$exceptionparam->courseid = $params['courseid'];
throw new moodle_exception('errorcoursecontextnotvalid' , 'webservice', '', $exceptionparam);
}
require_capability('moodle/course:enrolreview', $context);
$course = $DB->get_record('course', array('id' => $params['courseid']));
$manager = new course_enrolment_manager($PAGE, $course);
$users = $manager->get_potential_users($params['enrolid'],
$params['search'],
$params['searchanywhere'],
$params['page'],
$params['perpage']);
$results = array();
// Add also extra user fields.
$requiredfields = array_merge(
['id', 'fullname', 'profileimageurl', 'profileimageurlsmall'],
get_extra_user_fields($context)
);
foreach ($users['users'] as $id => $user) {
// Note: We pass the course here to validate that the current user can at least view user details in this course.
// The user we are looking at is not in this course yet though - but we only fetch the minimal set of
// user records, and the user has been validated to have course:enrolreview in this course. Otherwise
// there is no way to find users who aren't in the course in order to enrol them.
if ($userdetails = user_get_user_details($user, $course, $requiredfields)) {
$results[] = $userdetails;
}
}
return $results;
}
/**
* Returns description of method result value
*
* @return external_description
*/
public static function get_potential_users_returns() {
global $CFG;
require_once($CFG->dirroot . '/user/externallib.php');
return new external_multiple_structure(core_user_external::user_description());
}
/**
* Returns description of method parameters
*
* @return external_function_parameters
*/
public static function search_users_parameters(): external_function_parameters {
return new external_function_parameters(
[
'courseid' => new external_value(PARAM_INT, 'course id'),
'search' => new external_value(PARAM_RAW, 'query'),
'searchanywhere' => new external_value(PARAM_BOOL, 'find a match anywhere, or only at the beginning'),
'page' => new external_value(PARAM_INT, 'Page number'),
'perpage' => new external_value(PARAM_INT, 'Number per page'),
]
);
}
/**
* Search course participants.
*
* @param int $courseid Course id
* @param string $search The query
* @param bool $searchanywhere Match anywhere in the string
* @param int $page Page number
* @param int $perpage Max per page
* @return array An array of users
* @throws moodle_exception
*/
public static function search_users(int $courseid, string $search, bool $searchanywhere, int $page, int $perpage): array {
global $PAGE, $DB, $CFG;
require_once($CFG->dirroot.'/enrol/locallib.php');
require_once($CFG->dirroot.'/user/lib.php');
$params = self::validate_parameters(
self::search_users_parameters(),
[
'courseid' => $courseid,
'search' => $search,
'searchanywhere' => $searchanywhere,
'page' => $page,
'perpage' => $perpage
]
);
$context = context_course::instance($params['courseid']);
try {
self::validate_context($context);
} catch (Exception $e) {
$exceptionparam = new stdClass();
$exceptionparam->message = $e->getMessage();
$exceptionparam->courseid = $params['courseid'];
throw new moodle_exception('errorcoursecontextnotvalid' , 'webservice', '', $exceptionparam);
}
course_require_view_participants($context);
$course = get_course($params['courseid']);
$manager = new course_enrolment_manager($PAGE, $course);
$users = $manager->search_users($params['search'],
$params['searchanywhere'],
$params['page'],
$params['perpage']);
$results = [];
// Add also extra user fields.
$requiredfields = array_merge(
['id', 'fullname', 'profileimageurl', 'profileimageurlsmall'],
get_extra_user_fields($context)
);
foreach ($users['users'] as $user) {
if ($userdetails = user_get_user_details($user, $course, $requiredfields)) {
$results[] = $userdetails;
}
}
return $results;
}
/**
* Returns description of method result value
*
* @return external_multiple_structure
*/
public static function search_users_returns(): external_multiple_structure {
global $CFG;
require_once($CFG->dirroot . '/user/externallib.php');
return new external_multiple_structure(core_user_external::user_description());
}
/**
* Returns description of method parameters
*
* @return external_function_parameters
*/
public static function get_enrolled_users_parameters() {
return new external_function_parameters(
array(
'courseid' => new external_value(PARAM_INT, 'course id'),
'options' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'option name'),
'value' => new external_value(PARAM_RAW, 'option value')
)
), 'Option names:
* withcapability (string) return only users with this capability. This option requires \'moodle/role:review\' on the course context.
* groupid (integer) return only users in this group id. If the course has groups enabled and this param
isn\'t defined, returns all the viewable users.
This option requires \'moodle/site:accessallgroups\' on the course context if the
user doesn\'t belong to the group.
* onlyactive (integer) return only users with active enrolments and matching time restrictions. This option requires \'moodle/course:enrolreview\' on the course context.
* userfields (\'string, string, ...\') return only the values of these user fields.
* limitfrom (integer) sql limit from.
* limitnumber (integer) maximum number of returned users.
* sortby (string) sort by id, firstname or lastname. For ordering like the site does, use siteorder.
* sortdirection (string) ASC or DESC',
VALUE_DEFAULT, array()),
)
);
}
/**
* Get course participants details
*
* @param int $courseid course id
* @param array $options options {
* 'name' => option name
* 'value' => option value
* }
* @return array An array of users
*/
public static function get_enrolled_users($courseid, $options = array()) {
global $CFG, $USER, $DB;
require_once($CFG->dirroot . '/course/lib.php');
require_once($CFG->dirroot . "/user/lib.php");
$params = self::validate_parameters(
self::get_enrolled_users_parameters(),
array(
'courseid'=>$courseid,
'options'=>$options
)
);
$withcapability = '';
$groupid = 0;
$onlyactive = false;
$userfields = array();
$limitfrom = 0;
$limitnumber = 0;
$sortby = 'us.id';
$sortparams = array();
$sortdirection = 'ASC';
foreach ($options as $option) {
switch ($option['name']) {
case 'withcapability':
$withcapability = $option['value'];
break;
case 'groupid':
$groupid = (int)$option['value'];
break;
case 'onlyactive':
$onlyactive = !empty($option['value']);
break;
case 'userfields':
$thefields = explode(',', $option['value']);
foreach ($thefields as $f) {
$userfields[] = clean_param($f, PARAM_ALPHANUMEXT);
}
break;
case 'limitfrom' :
$limitfrom = clean_param($option['value'], PARAM_INT);
break;
case 'limitnumber' :
$limitnumber = clean_param($option['value'], PARAM_INT);
break;
case 'sortby':
$sortallowedvalues = array('id', 'firstname', 'lastname', 'siteorder');
if (!in_array($option['value'], $sortallowedvalues)) {
throw new invalid_parameter_exception('Invalid value for sortby parameter (value: ' . $option['value'] . '),' .
'allowed values are: ' . implode(',', $sortallowedvalues));
}
if ($option['value'] == 'siteorder') {
list($sortby, $sortparams) = users_order_by_sql('us');
} else {
$sortby = 'us.' . $option['value'];
}
break;
case 'sortdirection':
$sortdirection = strtoupper($option['value']);
$directionallowedvalues = array('ASC', 'DESC');
if (!in_array($sortdirection, $directionallowedvalues)) {
throw new invalid_parameter_exception('Invalid value for sortdirection parameter
(value: ' . $sortdirection . '),' . 'allowed values are: ' . implode(',', $directionallowedvalues));
}
break;
}
}
$course = $DB->get_record('course', array('id'=>$courseid), '*', MUST_EXIST);
$coursecontext = context_course::instance($courseid, IGNORE_MISSING);
if ($courseid == SITEID) {
$context = context_system::instance();
} else {
$context = $coursecontext;
}
try {
self::validate_context($context);
} catch (Exception $e) {
$exceptionparam = new stdClass();
$exceptionparam->message = $e->getMessage();
$exceptionparam->courseid = $params['courseid'];
throw new moodle_exception('errorcoursecontextnotvalid' , 'webservice', '', $exceptionparam);
}
course_require_view_participants($context);
// to overwrite this parameter, you need role:review capability
if ($withcapability) {
require_capability('moodle/role:review', $coursecontext);
}
// need accessallgroups capability if you want to overwrite this option
if (!empty($groupid) && !groups_is_member($groupid)) {
require_capability('moodle/site:accessallgroups', $coursecontext);
}
// to overwrite this option, you need course:enrolereview permission
if ($onlyactive) {
require_capability('moodle/course:enrolreview', $coursecontext);
}
list($enrolledsql, $enrolledparams) = get_enrolled_sql($coursecontext, $withcapability, $groupid, $onlyactive);
$ctxselect = ', ' . context_helper::get_preload_record_columns_sql('ctx');
$ctxjoin = "LEFT JOIN {context} ctx ON (ctx.instanceid = u.id AND ctx.contextlevel = :contextlevel)";
$enrolledparams['contextlevel'] = CONTEXT_USER;
$groupjoin = '';
if (empty($groupid) && groups_get_course_groupmode($course) == SEPARATEGROUPS &&
!has_capability('moodle/site:accessallgroups', $coursecontext)) {
// Filter by groups the user can view.
$usergroups = groups_get_user_groups($course->id);
if (!empty($usergroups['0'])) {
list($groupsql, $groupparams) = $DB->get_in_or_equal($usergroups['0'], SQL_PARAMS_NAMED);
$groupjoin = "JOIN {groups_members} gm ON (u.id = gm.userid AND gm.groupid $groupsql)";
$enrolledparams = array_merge($enrolledparams, $groupparams);
} else {
// User doesn't belong to any group, so he can't see any user. Return an empty array.
return array();
}
}
$sql = "SELECT us.*, COALESCE(ul.timeaccess, 0) AS lastcourseaccess
FROM {user} us
JOIN (
SELECT DISTINCT u.id $ctxselect
FROM {user} u $ctxjoin $groupjoin
WHERE u.id IN ($enrolledsql)
) q ON q.id = us.id
LEFT JOIN {user_lastaccess} ul ON (ul.userid = us.id AND ul.courseid = :courseid)
ORDER BY $sortby $sortdirection";
$enrolledparams = array_merge($enrolledparams, $sortparams);
$enrolledparams['courseid'] = $courseid;
$enrolledusers = $DB->get_recordset_sql($sql, $enrolledparams, $limitfrom, $limitnumber);
$users = array();
foreach ($enrolledusers as $user) {
context_helper::preload_from_record($user);
if ($userdetails = user_get_user_details($user, $course, $userfields)) {
$users[] = $userdetails;
}
}
$enrolledusers->close();
return $users;
}
/**
* Returns description of method result value
*
* @return external_description
*/
public static function get_enrolled_users_returns() {
return new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'ID of the user'),
'username' => new external_value(PARAM_RAW, 'Username policy is defined in Moodle security config', VALUE_OPTIONAL),
'firstname' => new external_value(PARAM_NOTAGS, 'The first name(s) of the user', VALUE_OPTIONAL),
'lastname' => new external_value(PARAM_NOTAGS, 'The family name of the user', VALUE_OPTIONAL),
'fullname' => new external_value(PARAM_NOTAGS, 'The fullname of the user'),
'email' => new external_value(PARAM_TEXT, 'An email address - allow email as root@localhost', VALUE_OPTIONAL),
'address' => new external_value(PARAM_TEXT, 'Postal address', VALUE_OPTIONAL),
'phone1' => new external_value(PARAM_NOTAGS, 'Phone 1', VALUE_OPTIONAL),
'phone2' => new external_value(PARAM_NOTAGS, 'Phone 2', VALUE_OPTIONAL),
'icq' => new external_value(PARAM_NOTAGS, 'icq number', VALUE_OPTIONAL),
'skype' => new external_value(PARAM_NOTAGS, 'skype id', VALUE_OPTIONAL),
'yahoo' => new external_value(PARAM_NOTAGS, 'yahoo id', VALUE_OPTIONAL),
'aim' => new external_value(PARAM_NOTAGS, 'aim id', VALUE_OPTIONAL),
'msn' => new external_value(PARAM_NOTAGS, 'msn number', VALUE_OPTIONAL),
'department' => new external_value(PARAM_TEXT, 'department', VALUE_OPTIONAL),
'institution' => new external_value(PARAM_TEXT, 'institution', VALUE_OPTIONAL),
'idnumber' => new external_value(PARAM_RAW, 'An arbitrary ID code number perhaps from the institution', VALUE_OPTIONAL),
'interests' => new external_value(PARAM_TEXT, 'user interests (separated by commas)', VALUE_OPTIONAL),
'firstaccess' => new external_value(PARAM_INT, 'first access to the site (0 if never)', VALUE_OPTIONAL),
'lastaccess' => new external_value(PARAM_INT, 'last access to the site (0 if never)', VALUE_OPTIONAL),
'lastcourseaccess' => new external_value(PARAM_INT, 'last access to the course (0 if never)', VALUE_OPTIONAL),
'description' => new external_value(PARAM_RAW, 'User profile description', VALUE_OPTIONAL),
'descriptionformat' => new external_format_value('description', VALUE_OPTIONAL),
'city' => new external_value(PARAM_NOTAGS, 'Home city of the user', VALUE_OPTIONAL),
'url' => new external_value(PARAM_URL, 'URL of the user', VALUE_OPTIONAL),
'country' => new external_value(PARAM_ALPHA, 'Home country code of the user, such as AU or CZ', VALUE_OPTIONAL),
'profileimageurlsmall' => new external_value(PARAM_URL, 'User image profile URL - small version', VALUE_OPTIONAL),
'profileimageurl' => new external_value(PARAM_URL, 'User image profile URL - big version', VALUE_OPTIONAL),
'customfields' => new external_multiple_structure(
new external_single_structure(
array(
'type' => new external_value(PARAM_ALPHANUMEXT, 'The type of the custom field - text field, checkbox...'),
'value' => new external_value(PARAM_RAW, 'The value of the custom field'),
'name' => new external_value(PARAM_RAW, 'The name of the custom field'),
'shortname' => new external_value(PARAM_RAW, 'The shortname of the custom field - to be able to build the field class in the code'),
)
), 'User custom fields (also known as user profil fields)', VALUE_OPTIONAL),
'groups' => new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'group id'),
'name' => new external_value(PARAM_RAW, 'group name'),
'description' => new external_value(PARAM_RAW, 'group description'),
'descriptionformat' => new external_format_value('description'),
)
), 'user groups', VALUE_OPTIONAL),
'roles' => new external_multiple_structure(
new external_single_structure(
array(
'roleid' => new external_value(PARAM_INT, 'role id'),
'name' => new external_value(PARAM_RAW, 'role name'),
'shortname' => new external_value(PARAM_ALPHANUMEXT, 'role shortname'),
'sortorder' => new external_value(PARAM_INT, 'role sortorder')
)
), 'user roles', VALUE_OPTIONAL),
'preferences' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_RAW, 'The name of the preferences'),
'value' => new external_value(PARAM_RAW, 'The value of the custom field'),
)
), 'User preferences', VALUE_OPTIONAL),
'enrolledcourses' => new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'Id of the course'),
'fullname' => new external_value(PARAM_RAW, 'Fullname of the course'),
'shortname' => new external_value(PARAM_RAW, 'Shortname of the course')
)
), 'Courses where the user is enrolled - limited by which courses the user is able to see', VALUE_OPTIONAL)
)
)
);
}
/**
* Returns description of get_course_enrolment_methods() parameters
*
* @return external_function_parameters
*/
public static function get_course_enrolment_methods_parameters() {
return new external_function_parameters(
array(
'courseid' => new external_value(PARAM_INT, 'Course id')
)
);
}
/**
* Get list of active course enrolment methods for current user.
*
* @param int $courseid
* @return array of course enrolment methods
* @throws moodle_exception
*/
public static function get_course_enrolment_methods($courseid) {
global $DB;
$params = self::validate_parameters(self::get_course_enrolment_methods_parameters(), array('courseid' => $courseid));
self::validate_context(context_system::instance());
$course = $DB->get_record('course', array('id' => $params['courseid']), '*', MUST_EXIST);
if (!core_course_category::can_view_course_info($course) && !can_access_course($course)) {
throw new moodle_exception('coursehidden');
}
$result = array();
$enrolinstances = enrol_get_instances($params['courseid'], true);
foreach ($enrolinstances as $enrolinstance) {
if ($enrolplugin = enrol_get_plugin($enrolinstance->enrol)) {
if ($instanceinfo = $enrolplugin->get_enrol_info($enrolinstance)) {
$result[] = (array) $instanceinfo;
}
}
}
return $result;
}
/**
* Returns description of get_course_enrolment_methods() result value
*
* @return external_description
*/
public static function get_course_enrolment_methods_returns() {
return new external_multiple_structure(
new external_single_structure(
array(
'id' => new external_value(PARAM_INT, 'id of course enrolment instance'),
'courseid' => new external_value(PARAM_INT, 'id of course'),
'type' => new external_value(PARAM_PLUGIN, 'type of enrolment plugin'),
'name' => new external_value(PARAM_RAW, 'name of enrolment plugin'),
'status' => new external_value(PARAM_RAW, 'status of enrolment plugin'),
'wsfunction' => new external_value(PARAM_ALPHANUMEXT, 'webservice function to get more information', VALUE_OPTIONAL),
)
)
);
}
/**
* Returns description of edit_user_enrolment() parameters
*
* @deprecated since 3.8
* @return external_function_parameters
*/
public static function edit_user_enrolment_parameters() {
return new external_function_parameters(
array(
'courseid' => new external_value(PARAM_INT, 'User enrolment ID'),
'ueid' => new external_value(PARAM_INT, 'User enrolment ID'),
'status' => new external_value(PARAM_INT, 'Enrolment status'),
'timestart' => new external_value(PARAM_INT, 'Enrolment start timestamp', VALUE_DEFAULT, 0),
'timeend' => new external_value(PARAM_INT, 'Enrolment end timestamp', VALUE_DEFAULT, 0),
)
);
}
/**
* External function that updates a given user enrolment.
*
* @deprecated since 3.8
* @param int $courseid The course ID.
* @param int $ueid The user enrolment ID.
* @param int $status The enrolment status.
* @param int $timestart Enrolment start timestamp.
* @param int $timeend Enrolment end timestamp.
* @return array An array consisting of the processing result, errors and form output, if available.
*/
public static function edit_user_enrolment($courseid, $ueid, $status, $timestart = 0, $timeend = 0) {
global $CFG, $DB, $PAGE;
$params = self::validate_parameters(self::edit_user_enrolment_parameters(), [
'courseid' => $courseid,
'ueid' => $ueid,
'status' => $status,
'timestart' => $timestart,
'timeend' => $timeend,
]);
$course = get_course($courseid);
$context = context_course::instance($course->id);
self::validate_context($context);
$userenrolment = $DB->get_record('user_enrolments', ['id' => $params['ueid']], '*', MUST_EXIST);
$userenroldata = [
'status' => $params['status'],
'timestart' => $params['timestart'],
'timeend' => $params['timeend'],
];
$result = false;
$errors = [];
// Validate data against the edit user enrolment form.
$instance = $DB->get_record('enrol', ['id' => $userenrolment->enrolid], '*', MUST_EXIST);
$plugin = enrol_get_plugin($instance->enrol);
require_once("$CFG->dirroot/enrol/editenrolment_form.php");
$customformdata = [
'ue' => $userenrolment,
'modal' => true,
'enrolinstancename' => $plugin->get_instance_name($instance)
];
$mform = new \enrol_user_enrolment_form(null, $customformdata, 'post', '', null, true, $userenroldata);
$mform->set_data($userenroldata);
$validationerrors = $mform->validation($userenroldata, null);
if (empty($validationerrors)) {
require_once($CFG->dirroot . '/enrol/locallib.php');
$manager = new course_enrolment_manager($PAGE, $course);
$result = $manager->edit_enrolment($userenrolment, (object)$userenroldata);
} else {
foreach ($validationerrors as $key => $errormessage) {
$errors[] = (object)[
'key' => $key,
'message' => $errormessage
];
}
}
return [
'result' => $result,
'errors' => $errors,
];
}
/**
* Returns description of edit_user_enrolment() result value
*
* @deprecated since 3.8
* @return external_description
*/
public static function edit_user_enrolment_returns() {
return new external_single_structure(
array(
'result' => new external_value(PARAM_BOOL, 'True if the user\'s enrolment was successfully updated'),
'errors' => new external_multiple_structure(
new external_single_structure(
array(
'key' => new external_value(PARAM_TEXT, 'The data that failed the validation'),
'message' => new external_value(PARAM_TEXT, 'The error message'),
)
), 'List of validation errors'
),
)
);
}
/**
* Mark the edit_user_enrolment web service as deprecated.
*
* @return bool
*/
public static function edit_user_enrolment_is_deprecated() {
return true;
}
/**
* Returns description of submit_user_enrolment_form parameters.
*
* @return external_function_parameters.
*/
public static function submit_user_enrolment_form_parameters() {
return new external_function_parameters([
'formdata' => new external_value(PARAM_RAW, 'The data from the event form'),
]);
}
/**
* External function that handles the user enrolment form submission.
*
* @param string $formdata The user enrolment form data in s URI encoded param string
* @return array An array consisting of the processing result and error flag, if available
*/
public static function submit_user_enrolment_form($formdata) {
global $CFG, $DB, $PAGE;
// Parameter validation.
$params = self::validate_parameters(self::submit_user_enrolment_form_parameters(), ['formdata' => $formdata]);
$data = [];
parse_str($params['formdata'], $data);
$userenrolment = $DB->get_record('user_enrolments', ['id' => $data['ue']], '*', MUST_EXIST);
$instance = $DB->get_record('enrol', ['id' => $userenrolment->enrolid], '*', MUST_EXIST);
$plugin = enrol_get_plugin($instance->enrol);
$course = get_course($instance->courseid);
$context = context_course::instance($course->id);
self::validate_context($context);
require_once("$CFG->dirroot/enrol/editenrolment_form.php");
$customformdata = [
'ue' => $userenrolment,
'modal' => true,
'enrolinstancename' => $plugin->get_instance_name($instance)
];
$mform = new enrol_user_enrolment_form(null, $customformdata, 'post', '', null, true, $data);
if ($validateddata = $mform->get_data()) {
if (!empty($validateddata->duration) && $validateddata->timeend == 0) {
$validateddata->timeend = $validateddata->timestart + $validateddata->duration;
}
require_once($CFG->dirroot . '/enrol/locallib.php');
$manager = new course_enrolment_manager($PAGE, $course);
$result = $manager->edit_enrolment($userenrolment, $validateddata);
return ['result' => $result];
} else {
return ['result' => false, 'validationerror' => true];
}
}
/**
* Returns description of submit_user_enrolment_form() result value
*
* @return external_description
*/
public static function submit_user_enrolment_form_returns() {
return new external_single_structure([
'result' => new external_value(PARAM_BOOL, 'True if the user\'s enrolment was successfully updated'),
'validationerror' => new external_value(PARAM_BOOL, 'Indicates invalid form data', VALUE_DEFAULT, false),
]);
}
/**
* Returns description of unenrol_user_enrolment() parameters
*
* @return external_function_parameters
*/
public static function unenrol_user_enrolment_parameters() {
return new external_function_parameters(
array(
'ueid' => new external_value(PARAM_INT, 'User enrolment ID')
)
);
}
/**
* External function that unenrols a given user enrolment.
*
* @param int $ueid The user enrolment ID.
* @return array An array consisting of the processing result, errors.
*/
public static function unenrol_user_enrolment($ueid) {
global $CFG, $DB, $PAGE;
$params = self::validate_parameters(self::unenrol_user_enrolment_parameters(), [
'ueid' => $ueid
]);
$result = false;
$errors = [];
$userenrolment = $DB->get_record('user_enrolments', ['id' => $params['ueid']], '*');
if ($userenrolment) {
$userid = $userenrolment->userid;
$enrolid = $userenrolment->enrolid;
$enrol = $DB->get_record('enrol', ['id' => $enrolid], '*', MUST_EXIST);
$courseid = $enrol->courseid;
$course = get_course($courseid);
$context = context_course::instance($course->id);
self::validate_context($context);
} else {
$validationerrors['invalidrequest'] = get_string('invalidrequest', 'enrol');
}
// If the userenrolment exists, unenrol the user.
if (!isset($validationerrors)) {
require_once($CFG->dirroot . '/enrol/locallib.php');
$manager = new course_enrolment_manager($PAGE, $course);
$result = $manager->unenrol_user($userenrolment);
} else {
foreach ($validationerrors as $key => $errormessage) {
$errors[] = (object)[
'key' => $key,
'message' => $errormessage
];
}
}
return [
'result' => $result,
'errors' => $errors,
];
}
/**
* Returns description of unenrol_user_enrolment() result value
*
* @return external_description
*/
public static function unenrol_user_enrolment_returns() {
return new external_single_structure(
array(
'result' => new external_value(PARAM_BOOL, 'True if the user\'s enrolment was successfully updated'),
'errors' => new external_multiple_structure(
new external_single_structure(
array(
'key' => new external_value(PARAM_TEXT, 'The data that failed the validation'),
'message' => new external_value(PARAM_TEXT, 'The error message'),
)
), 'List of validation errors'
),
)
);
}
}
/**
* Role external functions
*
* @package core_role
* @category external
* @copyright 2011 Jerome Mouneyrac
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.2
*/
class core_role_external extends external_api {
/**
* Returns description of method parameters
*
* @return external_function_parameters
*/
public static function assign_roles_parameters() {
return new external_function_parameters(
array(
'assignments' => new external_multiple_structure(
new external_single_structure(
array(
'roleid' => new external_value(PARAM_INT, 'Role to assign to the user'),
'userid' => new external_value(PARAM_INT, 'The user that is going to be assigned'),
'contextid' => new external_value(PARAM_INT, 'The context to assign the user role in', VALUE_OPTIONAL),
'contextlevel' => new external_value(PARAM_ALPHA, 'The context level to assign the user role in
(block, course, coursecat, system, user, module)', VALUE_OPTIONAL),
'instanceid' => new external_value(PARAM_INT, 'The Instance id of item where the role needs to be assigned', VALUE_OPTIONAL),
)
)
)
)
);
}
/**
* Manual role assignments to users
*
* @param array $assignments An array of manual role assignment
*/
public static function assign_roles($assignments) {
global $DB;
// Do basic automatic PARAM checks on incoming data, using params description
// If any problems are found then exceptions are thrown with helpful error messages
$params = self::validate_parameters(self::assign_roles_parameters(), array('assignments'=>$assignments));
$transaction = $DB->start_delegated_transaction();
foreach ($params['assignments'] as $assignment) {
// Ensure correct context level with a instance id or contextid is passed.
$context = self::get_context_from_params($assignment);
// Ensure the current user is allowed to run this function in the enrolment context.
self::validate_context($context);
require_capability('moodle/role:assign', $context);
// throw an exception if user is not able to assign the role in this context
$roles = get_assignable_roles($context, ROLENAME_SHORT);
if (!array_key_exists($assignment['roleid'], $roles)) {
throw new invalid_parameter_exception('Can not assign roleid='.$assignment['roleid'].' in contextid='.$assignment['contextid']);
}
role_assign($assignment['roleid'], $assignment['userid'], $context->id);
}
$transaction->allow_commit();
}
/**
* Returns description of method result value
*
* @return null
*/
public static function assign_roles_returns() {
return null;
}
/**
* Returns description of method parameters
*
* @return external_function_parameters
*/
public static function unassign_roles_parameters() {
return new external_function_parameters(
array(
'unassignments' => new external_multiple_structure(
new external_single_structure(
array(
'roleid' => new external_value(PARAM_INT, 'Role to assign to the user'),
'userid' => new external_value(PARAM_INT, 'The user that is going to be assigned'),
'contextid' => new external_value(PARAM_INT, 'The context to unassign the user role from', VALUE_OPTIONAL),
'contextlevel' => new external_value(PARAM_ALPHA, 'The context level to unassign the user role in
+ (block, course, coursecat, system, user, module)', VALUE_OPTIONAL),
'instanceid' => new external_value(PARAM_INT, 'The Instance id of item where the role needs to be unassigned', VALUE_OPTIONAL),
)
)
)
)
);
}
/**
* Unassign roles from users
*
* @param array $unassignments An array of unassignment
*/
public static function unassign_roles($unassignments) {
global $DB;
// Do basic automatic PARAM checks on incoming data, using params description
// If any problems are found then exceptions are thrown with helpful error messages
$params = self::validate_parameters(self::unassign_roles_parameters(), array('unassignments'=>$unassignments));
$transaction = $DB->start_delegated_transaction();
foreach ($params['unassignments'] as $unassignment) {
// Ensure the current user is allowed to run this function in the unassignment context
$context = self::get_context_from_params($unassignment);
self::validate_context($context);
require_capability('moodle/role:assign', $context);
// throw an exception if user is not able to unassign the role in this context
$roles = get_assignable_roles($context, ROLENAME_SHORT);
if (!array_key_exists($unassignment['roleid'], $roles)) {
throw new invalid_parameter_exception('Can not unassign roleid='.$unassignment['roleid'].' in contextid='.$unassignment['contextid']);
}
role_unassign($unassignment['roleid'], $unassignment['userid'], $context->id);
}
$transaction->allow_commit();
}
/**
* Returns description of method result value
*
* @return null
*/
public static function unassign_roles_returns() {
return null;
}
}