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- Bug fixes for general core bugs in 4.3.x will end 7 October 2024 (12 months).
- Bug fixes for security issues in 4.3.x will end 21 April 2025 (18 months).
- PHP version: minimum PHP 8.0.0 Note: minimum PHP version has increased since Moodle 4.1. PHP 8.2.x is supported too.
/lib/classes/ -> user.php (source)
<?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/>.
/**
* User class
*
* @package core
* @copyright 2013 Rajesh Taneja <rajesh@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* User class to access user details.
*
* @todo move api's from user/lib.php and deprecate old ones.
* @package core
* @copyright 2013 Rajesh Taneja <rajesh@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class core_user {
/**
* No reply user id.
*/
const NOREPLY_USER = -10;
/**
* Support user id.
*/
const SUPPORT_USER = -20;
/**
* Hide email address from everyone.
*/
const MAILDISPLAY_HIDE = 0;
/**
* Display email address to everyone.
*/
const MAILDISPLAY_EVERYONE = 1;
/**
* Display email address to course members only.
*/
const MAILDISPLAY_COURSE_MEMBERS_ONLY = 2;
/**
* List of fields that can be synched/locked during authentication.
*/
const AUTHSYNCFIELDS = [
'firstname',
'lastname',
'email',
'city',
'country',
'lang',
'description',
< 'url',
'idnumber',
'institution',
'department',
'phone1',
'phone2',
'address',
'firstnamephonetic',
'lastnamephonetic',
'middlename',
'alternatename'
];
/** @var int Indicates that user profile view should be prevented */
const VIEWPROFILE_PREVENT = -1;
/** @var int Indicates that user profile view should not be prevented */
const VIEWPROFILE_DO_NOT_PREVENT = 0;
/** @var int Indicates that user profile view should be allowed even if Moodle would prevent it */
const VIEWPROFILE_FORCE_ALLOW = 1;
/** @var stdClass keep record of noreply user */
public static $noreplyuser = false;
/** @var stdClass keep record of support user */
public static $supportuser = false;
/** @var array store user fields properties cache. */
protected static $propertiescache = null;
/** @var array store user preferences cache. */
protected static $preferencescache = null;
/**
* Return user object from db or create noreply or support user,
* if userid matches corse_user::NOREPLY_USER or corse_user::SUPPORT_USER
* respectively. If userid is not found, then return false.
*
* @param int $userid user id
* @param string $fields A comma separated list of user fields to be returned, support and noreply user
* will not be filtered by this.
* @param int $strictness IGNORE_MISSING means compatible mode, false returned if user not found, debug message if more found;
* IGNORE_MULTIPLE means return first user, ignore multiple user records found(not recommended);
* MUST_EXIST means throw an exception if no user record or multiple records found.
* @return stdClass|bool user record if found, else false.
* @throws dml_exception if user record not found and respective $strictness is set.
*/
public static function get_user($userid, $fields = '*', $strictness = IGNORE_MISSING) {
global $DB;
// If noreply user then create fake record and return.
switch ($userid) {
case self::NOREPLY_USER:
return self::get_noreply_user();
break;
case self::SUPPORT_USER:
return self::get_support_user();
break;
default:
return $DB->get_record('user', array('id' => $userid), $fields, $strictness);
}
}
/**
* Return user object from db based on their email.
*
* @param string $email The email of the user searched.
* @param string $fields A comma separated list of user fields to be returned, support and noreply user.
* @param int $mnethostid The id of the remote host.
* @param int $strictness IGNORE_MISSING means compatible mode, false returned if user not found, debug message if more found;
* IGNORE_MULTIPLE means return first user, ignore multiple user records found(not recommended);
* MUST_EXIST means throw an exception if no user record or multiple records found.
* @return stdClass|bool user record if found, else false.
* @throws dml_exception if user record not found and respective $strictness is set.
*/
public static function get_user_by_email($email, $fields = '*', $mnethostid = null, $strictness = IGNORE_MISSING) {
global $DB, $CFG;
// Because we use the username as the search criteria, we must also restrict our search based on mnet host.
if (empty($mnethostid)) {
// If empty, we restrict to local users.
$mnethostid = $CFG->mnet_localhost_id;
}
return $DB->get_record('user', array('email' => $email, 'mnethostid' => $mnethostid), $fields, $strictness);
}
/**
* Return user object from db based on their username.
*
* @param string $username The username of the user searched.
* @param string $fields A comma separated list of user fields to be returned, support and noreply user.
* @param int $mnethostid The id of the remote host.
* @param int $strictness IGNORE_MISSING means compatible mode, false returned if user not found, debug message if more found;
* IGNORE_MULTIPLE means return first user, ignore multiple user records found(not recommended);
* MUST_EXIST means throw an exception if no user record or multiple records found.
* @return stdClass|bool user record if found, else false.
* @throws dml_exception if user record not found and respective $strictness is set.
*/
public static function get_user_by_username($username, $fields = '*', $mnethostid = null, $strictness = IGNORE_MISSING) {
global $DB, $CFG;
// Because we use the username as the search criteria, we must also restrict our search based on mnet host.
if (empty($mnethostid)) {
// If empty, we restrict to local users.
$mnethostid = $CFG->mnet_localhost_id;
}
return $DB->get_record('user', array('username' => $username, 'mnethostid' => $mnethostid), $fields, $strictness);
}
/**
* Searches for users by name, possibly within a specified context, with current user's access.
*
* Deciding which users to search is complicated because it relies on user permissions;
* ideally, we shouldn't show names if you aren't allowed to see their profile. The permissions
* for seeing profile are really complicated.
*
* Even if search is restricted to a course, it's possible that other people might have
* been able to contribute within the course (e.g. they were enrolled before and not now;
* or people with system-level roles) so if the user has permission we do want to include
* everyone. However, if there are multiple results then we prioritise the ones who are
* enrolled in the course.
*
* If you have moodle/user:viewdetails at system level, you can search everyone.
* Otherwise we check which courses you *do* have that permission and search everyone who is
* enrolled on those courses.
*
* Normally you can only search the user's name. If you have the moodle/site:viewuseridentity
* capability then we also let you search the fields which are listed as identity fields in
* the 'showuseridentity' config option. For example, this might include the user's ID number
* or email.
*
* The $max parameter controls the maximum number of users returned. If users are restricted
* from view for some reason, multiple runs of the main query might be made; the $querylimit
* parameter allows this to be restricted. Both parameters can be zero to remove limits.
*
* The returned user objects include id, username, all fields required for user pictures, and
* user identity fields.
*
* @param string $query Search query text
* @param \context_course|null $coursecontext Course context or null if system-wide
* @param int $max Max number of users to return, default 30 (zero = no limit)
* @param int $querylimit Max number of database queries, default 5 (zero = no limit)
* @return array Array of user objects with limited fields
*/
public static function search($query, \context_course $coursecontext = null,
$max = 30, $querylimit = 5) {
global $CFG, $DB;
require_once($CFG->dirroot . '/user/lib.php');
// Allow limits to be turned off.
if (!$max) {
$max = PHP_INT_MAX;
}
if (!$querylimit) {
$querylimit = PHP_INT_MAX;
}
// Check permission to view profiles at each context.
$systemcontext = \context_system::instance();
$viewsystem = has_capability('moodle/user:viewdetails', $systemcontext);
if ($viewsystem) {
$userquery = 'SELECT id FROM {user}';
$userparams = [];
}
if (!$viewsystem) {
list($userquery, $userparams) = self::get_enrolled_sql_on_courses_with_capability(
'moodle/user:viewdetails');
if (!$userquery) {
// No permissions anywhere, return nothing.
return [];
}
}
// Start building the WHERE clause based on name.
< list ($where, $whereparams) = users_search_sql($query, 'u', false);
> list ($where, $whereparams) = users_search_sql($query, 'u');
// We allow users to search with extra identity fields (as well as name) but only if they
// have the permission to display those identity fields.
$extrasql = '';
$extraparams = [];
< if (empty($CFG->showuseridentity)) {
< // Explode gives wrong result with empty string.
< $extra = [];
< } else {
< $extra = explode(',', $CFG->showuseridentity);
< }
<
< // We need the username just to skip guests.
< $extrafieldlist = $extra;
< if (!in_array('username', $extra)) {
< $extrafieldlist[] = 'username';
< }
< // The deleted flag will always be false because users_search_sql excludes deleted users,
< // but it must be present or it causes PHP warnings in some functions below.
< if (!in_array('deleted', $extra)) {
< $extrafieldlist[] = 'deleted';
< }
< $selectfields = \user_picture::fields('u',
< array_merge(get_all_user_name_fields(), $extrafieldlist));
> // TODO Does not support custom user profile fields (MDL-70456).
> $userfieldsapi = \core_user\fields::for_identity(null, false)->with_userpic()->with_name()
> ->including('username', 'deleted');
> $selectfields = $userfieldsapi->get_sql('u', false, '', '', false)->selects;
> $extra = $userfieldsapi->get_required_fields([\core_user\fields::PURPOSE_IDENTITY]);
$index = 1;
foreach ($extra as $fieldname) {
if ($extrasql) {
$extrasql .= ' OR ';
}
$extrasql .= $DB->sql_like('u.' . $fieldname, ':extra' . $index, false);
$extraparams['extra' . $index] = $query . '%';
$index++;
}
$identitysystem = has_capability('moodle/site:viewuseridentity', $systemcontext);
$usingshowidentity = false;
if ($identitysystem) {
// They have permission everywhere so just add the extra query to the normal query.
$where .= ' OR ' . $extrasql;
$whereparams = array_merge($whereparams, $extraparams);
} else {
// Get all courses where user can view full user identity.
list($sql, $params) = self::get_enrolled_sql_on_courses_with_capability(
'moodle/site:viewuseridentity');
if ($sql) {
// Join that with the user query to get an extra field indicating if we can.
$userquery = "
SELECT innerusers.id, COUNT(identityusers.id) AS showidentity
FROM ($userquery) innerusers
LEFT JOIN ($sql) identityusers ON identityusers.id = innerusers.id
GROUP BY innerusers.id";
$userparams = array_merge($userparams, $params);
$usingshowidentity = true;
// Query on the extra fields only in those places.
$where .= ' OR (users.showidentity > 0 AND (' . $extrasql . '))';
$whereparams = array_merge($whereparams, $extraparams);
}
}
// Default order is just name order. But if searching within a course then we show users
// within the course first.
list ($order, $orderparams) = users_order_by_sql('u', $query, $systemcontext);
if ($coursecontext) {
list ($sql, $params) = get_enrolled_sql($coursecontext);
$mainfield = 'innerusers2.id';
if ($usingshowidentity) {
$mainfield .= ', innerusers2.showidentity';
}
$userquery = "
SELECT $mainfield, COUNT(courseusers.id) AS incourse
FROM ($userquery) innerusers2
LEFT JOIN ($sql) courseusers ON courseusers.id = innerusers2.id
GROUP BY $mainfield";
$userparams = array_merge($userparams, $params);
$order = 'incourse DESC, ' . $order;
}
// Get result (first 30 rows only) from database. Take a couple spare in case we have to
// drop some.
$result = [];
$got = 0;
$pos = 0;
$readcount = $max + 2;
for ($i = 0; $i < $querylimit; $i++) {
$rawresult = $DB->get_records_sql("
SELECT $selectfields
FROM ($userquery) users
JOIN {user} u ON u.id = users.id
WHERE $where
ORDER BY $order", array_merge($userparams, $whereparams, $orderparams),
$pos, $readcount);
foreach ($rawresult as $user) {
// Skip guest.
if ($user->username === 'guest') {
continue;
}
// Check user can really view profile (there are per-user cases where this could
// be different for some reason, this is the same check used by the profile view pages
// to double-check that it is OK).
if (!user_can_view_profile($user)) {
continue;
}
$result[] = $user;
$got++;
if ($got >= $max) {
break;
}
}
if ($got >= $max) {
// All necessary results obtained.
break;
}
if (count($rawresult) < $readcount) {
// No more results from database.
break;
}
$pos += $readcount;
}
return $result;
}
/**
* Gets an SQL query that lists all enrolled user ids on any course where the current
* user has the specified capability. Helper function used for searching users.
*
* @param string $capability Required capability
* @return array Array containing SQL and params, or two nulls if there are no courses
*/
protected static function get_enrolled_sql_on_courses_with_capability($capability) {
// Get all courses where user have the capability.
$courses = get_user_capability_course($capability, null, true,
implode(',', array_values(context_helper::get_preload_record_columns('ctx'))));
if (!$courses) {
return [null, null];
}
// Loop around all courses getting the SQL for enrolled users. Note: This query could
// probably be more efficient (without the union) if get_enrolled_sql had a way to
// pass an array of courseids, but it doesn't.
$unionsql = '';
$unionparams = [];
foreach ($courses as $course) {
// Get SQL to list user ids enrolled in this course.
\context_helper::preload_from_record($course);
list ($sql, $params) = get_enrolled_sql(\context_course::instance($course->id));
// Combine to a big union query.
if ($unionsql) {
$unionsql .= ' UNION ';
}
$unionsql .= $sql;
$unionparams = array_merge($unionparams, $params);
}
return [$unionsql, $unionparams];
}
/**
* Helper function to return dummy noreply user record.
*
* @return stdClass
*/
protected static function get_dummy_user_record() {
global $CFG;
$dummyuser = new stdClass();
$dummyuser->id = self::NOREPLY_USER;
$dummyuser->email = $CFG->noreplyaddress;
$dummyuser->firstname = get_string('noreplyname');
$dummyuser->username = 'noreply';
$dummyuser->lastname = '';
$dummyuser->confirmed = 1;
$dummyuser->suspended = 0;
$dummyuser->deleted = 0;
$dummyuser->picture = 0;
$dummyuser->auth = 'manual';
$dummyuser->firstnamephonetic = '';
$dummyuser->lastnamephonetic = '';
$dummyuser->middlename = '';
$dummyuser->alternatename = '';
$dummyuser->imagealt = '';
return $dummyuser;
}
/**
* Return noreply user record, this is currently used in messaging
* system only for sending messages from noreply email.
* It will return record of $CFG->noreplyuserid if set else return dummy
* user object with hard-coded $user->emailstop = 1 so noreply can be sent to user.
*
* @return stdClass user record.
*/
public static function get_noreply_user() {
global $CFG;
if (!empty(self::$noreplyuser)) {
return self::$noreplyuser;
}
// If noreply user is set then use it, else create one.
if (!empty($CFG->noreplyuserid)) {
self::$noreplyuser = self::get_user($CFG->noreplyuserid);
self::$noreplyuser->emailstop = 1; // Force msg stop for this user.
return self::$noreplyuser;
} else {
// Do not cache the dummy user record to avoid language internationalization issues.
$noreplyuser = self::get_dummy_user_record();
$noreplyuser->maildisplay = '1'; // Show to all.
$noreplyuser->emailstop = 1;
return $noreplyuser;
}
}
/**
* Return support user record, this is currently used in messaging
* system only for sending messages to support email.
* $CFG->supportuserid is set then returns user record
* $CFG->supportemail is set then return dummy record with $CFG->supportemail
* else return admin user record with hard-coded $user->emailstop = 0, so user
* gets support message.
*
* @return stdClass user record.
*/
public static function get_support_user() {
global $CFG;
if (!empty(self::$supportuser)) {
return self::$supportuser;
}
// If custom support user is set then use it, else if supportemail is set then use it, else use noreply.
if (!empty($CFG->supportuserid)) {
self::$supportuser = self::get_user($CFG->supportuserid, '*', MUST_EXIST);
} else if (empty(self::$supportuser) && !empty($CFG->supportemail)) {
// Try sending it to support email if support user is not set.
$supportuser = self::get_dummy_user_record();
$supportuser->id = self::SUPPORT_USER;
$supportuser->email = $CFG->supportemail;
if ($CFG->supportname) {
$supportuser->firstname = $CFG->supportname;
}
$supportuser->username = 'support';
$supportuser->maildisplay = '1'; // Show to all.
// Unset emailstop to make sure support message is sent.
$supportuser->emailstop = 0;
return $supportuser;
}
// Send support msg to admin user if nothing is set above.
if (empty(self::$supportuser)) {
self::$supportuser = get_admin();
}
// Unset emailstop to make sure support message is sent.
self::$supportuser->emailstop = 0;
return self::$supportuser;
}
/**
* Reset self::$noreplyuser and self::$supportuser.
* This is only used by phpunit, and there is no other use case for this function.
* Please don't use it outside phpunit.
*/
public static function reset_internal_users() {
if (PHPUNIT_TEST) {
self::$noreplyuser = false;
self::$supportuser = false;
} else {
debugging('reset_internal_users() should not be used outside phpunit.', DEBUG_DEVELOPER);
}
}
/**
* Return true if user id is greater than 0 and alternatively check db.
*
* @param int $userid user id.
* @param bool $checkdb if true userid will be checked in db. By default it's false, and
* userid is compared with 0 for performance.
* @return bool true is real user else false.
*/
public static function is_real_user($userid, $checkdb = false) {
global $DB;
if ($userid <= 0) {
return false;
}
if ($checkdb) {
return $DB->record_exists('user', array('id' => $userid));
} else {
return true;
}
}
/**
> * Determine whether the given user ID is that of the current user. Useful for components implementing permission callbacks
* Check if the given user is an active user in the site.
> * for preferences consumed by {@see fill_preferences_cache}
*
> *
* @param stdClass $user user object
> * @param stdClass $user
* @param boolean $checksuspended whether to check if the user has the account suspended
> * @return bool
* @param boolean $checknologin whether to check if the user uses the nologin auth method
> */
* @throws moodle_exception
> public static function is_current_user(stdClass $user): bool {
* @since Moodle 3.0
> global $USER;
*/
> return $user->id == $USER->id;
public static function require_active_user($user, $checksuspended = false, $checknologin = false) {
> }
>
if (!self::is_real_user($user->id)) {
> /**
throw new moodle_exception('invaliduser', 'error');
}
if ($user->deleted) {
throw new moodle_exception('userdeleted');
}
if (empty($user->confirmed)) {
throw new moodle_exception('usernotconfirmed', 'moodle', '', $user->username);
}
if (isguestuser($user)) {
throw new moodle_exception('guestsarenotallowed', 'error');
}
if ($checksuspended and $user->suspended) {
throw new moodle_exception('suspended', 'auth');
}
if ($checknologin and $user->auth == 'nologin') {
throw new moodle_exception('suspended', 'auth');
}
}
/**
* Updates the provided users profile picture based upon the expected fields returned from the edit or edit_advanced forms.
*
* @param stdClass $usernew An object that contains some information about the user being updated
* @param array $filemanageroptions
* @return bool True if the user was updated, false if it stayed the same.
*/
public static function update_picture(stdClass $usernew, $filemanageroptions = array()) {
global $CFG, $DB;
require_once("$CFG->libdir/gdlib.php");
$context = context_user::instance($usernew->id, MUST_EXIST);
$user = core_user::get_user($usernew->id, 'id, picture', MUST_EXIST);
$newpicture = $user->picture;
// Get file_storage to process files.
$fs = get_file_storage();
if (!empty($usernew->deletepicture)) {
// The user has chosen to delete the selected users picture.
$fs->delete_area_files($context->id, 'user', 'icon'); // Drop all images in area.
$newpicture = 0;
}
// Save newly uploaded file, this will avoid context mismatch for newly created users.
if (!isset($usernew->imagefile)) {
$usernew->imagefile = 0;
}
file_save_draft_area_files($usernew->imagefile, $context->id, 'user', 'newicon', 0, $filemanageroptions);
if (($iconfiles = $fs->get_area_files($context->id, 'user', 'newicon')) && count($iconfiles) == 2) {
// Get file which was uploaded in draft area.
foreach ($iconfiles as $file) {
if (!$file->is_directory()) {
break;
}
}
// Copy file to temporary location and the send it for processing icon.
if ($iconfile = $file->copy_content_to_temp()) {
// There is a new image that has been uploaded.
// Process the new image and set the user to make use of it.
// NOTE: Uploaded images always take over Gravatar.
$newpicture = (int)process_new_icon($context, 'user', 'icon', 0, $iconfile);
// Delete temporary file.
@unlink($iconfile);
// Remove uploaded file.
$fs->delete_area_files($context->id, 'user', 'newicon');
} else {
// Something went wrong while creating temp file.
// Remove uploaded file.
$fs->delete_area_files($context->id, 'user', 'newicon');
return false;
}
}
if ($newpicture != $user->picture) {
$DB->set_field('user', 'picture', $newpicture, array('id' => $user->id));
return true;
} else {
return false;
}
}
/**
* Definition of user profile fields and the expected parameter type for data validation.
*
* array(
* 'property_name' => array( // The user property to be checked. Should match the field on the user table.
* 'null' => NULL_ALLOWED, // Defaults to NULL_NOT_ALLOWED. Takes NULL_NOT_ALLOWED or NULL_ALLOWED.
* 'type' => PARAM_TYPE, // Expected parameter type of the user field.
* 'choices' => array(1, 2..) // An array of accepted values of the user field.
* 'default' => $CFG->setting // An default value for the field.
* )
* )
*
* The fields choices and default are optional.
*
* @return void
*/
protected static function fill_properties_cache() {
< global $CFG;
> global $CFG, $SESSION;
if (self::$propertiescache !== null) {
return;
}
// Array of user fields properties and expected parameters.
// Every new field on the user table should be added here otherwise it won't be validated.
$fields = array();
$fields['id'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED);
$fields['auth'] = array('type' => PARAM_AUTH, 'null' => NULL_NOT_ALLOWED);
$fields['confirmed'] = array('type' => PARAM_BOOL, 'null' => NULL_NOT_ALLOWED);
$fields['policyagreed'] = array('type' => PARAM_BOOL, 'null' => NULL_NOT_ALLOWED);
$fields['deleted'] = array('type' => PARAM_BOOL, 'null' => NULL_NOT_ALLOWED);
$fields['suspended'] = array('type' => PARAM_BOOL, 'null' => NULL_NOT_ALLOWED);
$fields['mnethostid'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED);
$fields['username'] = array('type' => PARAM_USERNAME, 'null' => NULL_NOT_ALLOWED);
$fields['password'] = array('type' => PARAM_RAW, 'null' => NULL_NOT_ALLOWED);
$fields['idnumber'] = array('type' => PARAM_RAW, 'null' => NULL_NOT_ALLOWED);
$fields['firstname'] = array('type' => PARAM_NOTAGS, 'null' => NULL_NOT_ALLOWED);
$fields['lastname'] = array('type' => PARAM_NOTAGS, 'null' => NULL_NOT_ALLOWED);
$fields['surname'] = array('type' => PARAM_NOTAGS, 'null' => NULL_NOT_ALLOWED);
$fields['email'] = array('type' => PARAM_RAW_TRIMMED, 'null' => NULL_NOT_ALLOWED);
$fields['emailstop'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED, 'default' => 0);
< $fields['icq'] = array('type' => PARAM_NOTAGS, 'null' => NULL_NOT_ALLOWED);
< $fields['skype'] = array('type' => PARAM_NOTAGS, 'null' => NULL_ALLOWED);
< $fields['aim'] = array('type' => PARAM_NOTAGS, 'null' => NULL_NOT_ALLOWED);
< $fields['yahoo'] = array('type' => PARAM_NOTAGS, 'null' => NULL_NOT_ALLOWED);
< $fields['msn'] = array('type' => PARAM_NOTAGS, 'null' => NULL_NOT_ALLOWED);
$fields['phone1'] = array('type' => PARAM_NOTAGS, 'null' => NULL_NOT_ALLOWED);
$fields['phone2'] = array('type' => PARAM_NOTAGS, 'null' => NULL_NOT_ALLOWED);
$fields['institution'] = array('type' => PARAM_TEXT, 'null' => NULL_NOT_ALLOWED);
$fields['department'] = array('type' => PARAM_TEXT, 'null' => NULL_NOT_ALLOWED);
$fields['address'] = array('type' => PARAM_TEXT, 'null' => NULL_NOT_ALLOWED);
$fields['city'] = array('type' => PARAM_TEXT, 'null' => NULL_NOT_ALLOWED, 'default' => $CFG->defaultcity);
$fields['country'] = array('type' => PARAM_ALPHA, 'null' => NULL_NOT_ALLOWED, 'default' => $CFG->country,
'choices' => array_merge(array('' => ''), get_string_manager()->get_list_of_countries(true, true)));
< $fields['lang'] = array('type' => PARAM_LANG, 'null' => NULL_NOT_ALLOWED, 'default' => $CFG->lang,
> $fields['lang'] = array('type' => PARAM_LANG, 'null' => NULL_NOT_ALLOWED,
> 'default' => (!empty($CFG->autolangusercreation) && !empty($SESSION->lang)) ? $SESSION->lang : $CFG->lang,
'choices' => array_merge(array('' => ''), get_string_manager()->get_list_of_translations(false)));
$fields['calendartype'] = array('type' => PARAM_PLUGIN, 'null' => NULL_NOT_ALLOWED, 'default' => $CFG->calendartype,
'choices' => array_merge(array('' => ''), \core_calendar\type_factory::get_list_of_calendar_types()));
$fields['theme'] = array('type' => PARAM_THEME, 'null' => NULL_NOT_ALLOWED,
'default' => theme_config::DEFAULT_THEME, 'choices' => array_merge(array('' => ''), get_list_of_themes()));
$fields['timezone'] = array('type' => PARAM_TIMEZONE, 'null' => NULL_NOT_ALLOWED,
'default' => core_date::get_server_timezone()); // Must not use choices here: timezones can come and go.
$fields['firstaccess'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED);
$fields['lastaccess'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED);
$fields['lastlogin'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED);
$fields['currentlogin'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED);
$fields['lastip'] = array('type' => PARAM_NOTAGS, 'null' => NULL_NOT_ALLOWED);
$fields['secret'] = array('type' => PARAM_ALPHANUM, 'null' => NULL_NOT_ALLOWED);
$fields['picture'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED);
< $fields['url'] = array('type' => PARAM_URL, 'null' => NULL_NOT_ALLOWED);
$fields['description'] = array('type' => PARAM_RAW, 'null' => NULL_ALLOWED);
$fields['descriptionformat'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED);
$fields['mailformat'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED,
'default' => $CFG->defaultpreference_mailformat);
$fields['maildigest'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED,
'default' => $CFG->defaultpreference_maildigest);
$fields['maildisplay'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED,
'default' => $CFG->defaultpreference_maildisplay);
$fields['autosubscribe'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED,
'default' => $CFG->defaultpreference_autosubscribe);
$fields['trackforums'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED,
'default' => $CFG->defaultpreference_trackforums);
$fields['timecreated'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED);
$fields['timemodified'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED);
$fields['trustbitmask'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED);
$fields['imagealt'] = array('type' => PARAM_TEXT, 'null' => NULL_ALLOWED);
$fields['lastnamephonetic'] = array('type' => PARAM_NOTAGS, 'null' => NULL_ALLOWED);
$fields['firstnamephonetic'] = array('type' => PARAM_NOTAGS, 'null' => NULL_ALLOWED);
$fields['middlename'] = array('type' => PARAM_NOTAGS, 'null' => NULL_ALLOWED);
$fields['alternatename'] = array('type' => PARAM_NOTAGS, 'null' => NULL_ALLOWED);
self::$propertiescache = $fields;
}
/**
* Get properties of a user field.
*
* @param string $property property name to be retrieved.
* @throws coding_exception if the requested property name is invalid.
* @return array the property definition.
*/
public static function get_property_definition($property) {
self::fill_properties_cache();
if (!array_key_exists($property, self::$propertiescache)) {
throw new coding_exception('Invalid property requested.');
}
return self::$propertiescache[$property];
}
/**
* Validate user data.
*
* This method just validates each user field and return an array of errors. It doesn't clean the data,
* the methods clean() and clean_field() should be used for this purpose.
*
* @param stdClass|array $data user data object or array to be validated.
* @return array|true $errors array of errors found on the user object, true if the validation passed.
*/
public static function validate($data) {
// Get all user profile fields definition.
self::fill_properties_cache();
foreach ($data as $property => $value) {
try {
if (isset(self::$propertiescache[$property])) {
validate_param($value, self::$propertiescache[$property]['type'], self::$propertiescache[$property]['null']);
}
// Check that the value is part of a list of allowed values.
if (!empty(self::$propertiescache[$property]['choices']) &&
!isset(self::$propertiescache[$property]['choices'][$value])) {
throw new invalid_parameter_exception($value);
}
} catch (invalid_parameter_exception $e) {
$errors[$property] = $e->getMessage();
}
}
return empty($errors) ? true : $errors;
}
/**
* Clean the properties cache.
*
* During unit tests we need to be able to reset all caches so that each new test starts in a known state.
* Intended for use only for testing, phpunit calls this before every test.
*/
public static function reset_caches() {
self::$propertiescache = null;
}
/**
* Clean the user data.
*
* @param stdClass|array $user the user data to be validated against properties definition.
* @return stdClass $user the cleaned user data.
*/
public static function clean_data($user) {
if (empty($user)) {
return $user;
}
foreach ($user as $field => $value) {
// Get the property parameter type and do the cleaning.
try {
$user->$field = core_user::clean_field($value, $field);
} catch (coding_exception $e) {
debugging("The property '$field' could not be cleaned.", DEBUG_DEVELOPER);
}
}
return $user;
}
/**
* Clean a specific user field.
*
* @param string $data the user field data to be cleaned.
* @param string $field the user field name on the property definition cache.
* @return string the cleaned user data.
*/
public static function clean_field($data, $field) {
if (empty($data) || empty($field)) {
return $data;
}
try {
$type = core_user::get_property_type($field);
if (isset(self::$propertiescache[$field]['choices'])) {
if (!array_key_exists($data, self::$propertiescache[$field]['choices'])) {
if (isset(self::$propertiescache[$field]['default'])) {
$data = self::$propertiescache[$field]['default'];
} else {
$data = '';
}
} else {
return $data;
}
} else {
$data = clean_param($data, $type);
}
} catch (coding_exception $e) {
debugging("The property '$field' could not be cleaned.", DEBUG_DEVELOPER);
}
return $data;
}
/**
* Get the parameter type of the property.
*
* @param string $property property name to be retrieved.
* @throws coding_exception if the requested property name is invalid.
* @return int the property parameter type.
*/
public static function get_property_type($property) {
self::fill_properties_cache();
if (!array_key_exists($property, self::$propertiescache)) {
throw new coding_exception('Invalid property requested: ' . $property);
}
return self::$propertiescache[$property]['type'];
}
/**
* Discover if the property is NULL_ALLOWED or NULL_NOT_ALLOWED.
*
* @param string $property property name to be retrieved.
* @throws coding_exception if the requested property name is invalid.
* @return bool true if the property is NULL_ALLOWED, false otherwise.
*/
public static function get_property_null($property) {
self::fill_properties_cache();
if (!array_key_exists($property, self::$propertiescache)) {
throw new coding_exception('Invalid property requested: ' . $property);
}
return self::$propertiescache[$property]['null'];
}
/**
* Get the choices of the property.
*
* This is a helper method to validate a value against a list of acceptable choices.
* For instance: country, language, themes and etc.
*
* @param string $property property name to be retrieved.
* @throws coding_exception if the requested property name is invalid or if it does not has a list of choices.
* @return array the property parameter type.
*/
public static function get_property_choices($property) {
self::fill_properties_cache();
if (!array_key_exists($property, self::$propertiescache) && !array_key_exists('choices',
self::$propertiescache[$property])) {
throw new coding_exception('Invalid property requested, or the property does not has a list of choices.');
}
return self::$propertiescache[$property]['choices'];
}
/**
* Get the property default.
*
* This method gets the default value of a field (if exists).
*
* @param string $property property name to be retrieved.
* @throws coding_exception if the requested property name is invalid or if it does not has a default value.
* @return string the property default value.
*/
public static function get_property_default($property) {
self::fill_properties_cache();
if (!array_key_exists($property, self::$propertiescache) || !isset(self::$propertiescache[$property]['default'])) {
throw new coding_exception('Invalid property requested, or the property does not has a default value.');
}
return self::$propertiescache[$property]['default'];
}
/**
* Definition of updateable user preferences and rules for data and access validation.
*
* array(
* 'preferencename' => array( // Either exact preference name or a regular expression.
* 'null' => NULL_ALLOWED, // Defaults to NULL_NOT_ALLOWED. Takes NULL_NOT_ALLOWED or NULL_ALLOWED.
* 'type' => PARAM_TYPE, // Expected parameter type of the user field - mandatory
* 'choices' => array(1, 2..) // An array of accepted values of the user field - optional
* 'default' => $CFG->setting // An default value for the field - optional
* 'isregex' => false/true // Whether the name of the preference is a regular expression (default false).
* 'permissioncallback' => callable // Function accepting arguments ($user, $preferencename) that checks if current user
* // is allowed to modify this preference for given user.
* // If not specified core_user::default_preference_permission_check() will be assumed.
* 'cleancallback' => callable // Custom callback for cleaning value if something more difficult than just type/choices is needed
* // accepts arguments ($value, $preferencename)
* )
* )
*
* @return void
*/
protected static function fill_preferences_cache() {
> global $CFG;
if (self::$preferencescache !== null) {
>
return;
}
// Array of user preferences and expected types/values.
// Every preference that can be updated directly by user should be added here.
$preferences = array();
$preferences['auth_forcepasswordchange'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED, 'choices' => array(0, 1),
'permissioncallback' => function($user, $preferencename) {
global $USER;
$systemcontext = context_system::instance();
return ($USER->id != $user->id && (has_capability('moodle/user:update', $systemcontext) ||
($user->timecreated > time() - 10 && has_capability('moodle/user:create', $systemcontext))));
});
< $preferences['usemodchooser'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED, 'default' => 1,
< 'choices' => array(0, 1));
$preferences['forum_markasreadonnotification'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED, 'default' => 1,
'choices' => array(0, 1));
$preferences['htmleditor'] = array('type' => PARAM_NOTAGS, 'null' => NULL_ALLOWED,
'cleancallback' => function($value, $preferencename) {
if (empty($value) || !array_key_exists($value, core_component::get_plugin_list('editor'))) {
return null;
}
return $value;
});
$preferences['badgeprivacysetting'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED, 'default' => 1,
'choices' => array(0, 1), 'permissioncallback' => function($user, $preferencename) {
< global $CFG, $USER;
< return !empty($CFG->enablebadges) && $user->id == $USER->id;
> global $CFG;
> return !empty($CFG->enablebadges) && self::is_current_user($user);
});
$preferences['blogpagesize'] = array('type' => PARAM_INT, 'null' => NULL_NOT_ALLOWED, 'default' => 10,
'permissioncallback' => function($user, $preferencename) {
< global $USER;
< return $USER->id == $user->id && has_capability('moodle/blog:view', context_system::instance());
> return self::is_current_user($user) && has_capability('moodle/blog:view', context_system::instance());
});
< $preferences['user_home_page_preference'] = array('type' => PARAM_INT, 'null' => NULL_ALLOWED, 'default' => HOMEPAGE_MY,
< 'choices' => array(HOMEPAGE_SITE, HOMEPAGE_MY),
> $preferences['filemanager_recentviewmode'] = [
> 'type' => PARAM_INT,
> 'null' => NULL_NOT_ALLOWED,
> 'default' => 1,
> 'choices' => [1, 2, 3],
> 'permissioncallback' => [static::class, 'is_current_user'],
> ];
> $preferences['filepicker_recentrepository'] = [
> 'type' => PARAM_INT,
> 'null' => NULL_NOT_ALLOWED,
> 'permissioncallback' => [static::class, 'is_current_user'],
> ];
> $preferences['filepicker_recentlicense'] = [
> 'type' => PARAM_SAFEDIR,
> 'null' => NULL_NOT_ALLOWED,
> 'permissioncallback' => [static::class, 'is_current_user'],
> ];
> $preferences['filepicker_recentviewmode'] = [
> 'type' => PARAM_INT,
> 'null' => NULL_NOT_ALLOWED,
> 'default' => 1,
> 'choices' => [1, 2, 3],
> 'permissioncallback' => [static::class, 'is_current_user'],
> ];
> $preferences['userselector_optionscollapsed'] = [
> 'type' => PARAM_BOOL,
> 'null' => NULL_NOT_ALLOWED,
> 'default' => true,
> 'permissioncallback' => [static::class, 'is_current_user'],
> ];
> $preferences['userselector_autoselectunique'] = [
> 'type' => PARAM_BOOL,
> 'null' => NULL_NOT_ALLOWED,
> 'default' => false,
> 'permissioncallback' => [static::class, 'is_current_user'],
> ];
> $preferences['userselector_preserveselected'] = [
> 'type' => PARAM_BOOL,
> 'null' => NULL_NOT_ALLOWED,
> 'default' => false,
> 'permissioncallback' => [static::class, 'is_current_user'],
> ];
> $preferences['userselector_searchtype'] = [
> 'type' => PARAM_INT,
> 'null' => NULL_NOT_ALLOWED,
> 'default' => USER_SEARCH_STARTS_WITH,
> 'permissioncallback' => [static::class, 'is_current_user'],
> ];
> $preferences['question_bank_advanced_search'] = [
> 'type' => PARAM_BOOL,
> 'null' => NULL_NOT_ALLOWED,
> 'default' => false,
> 'permissioncallback' => [static::class, 'is_current_user'],
> ];
>
> $choices = [HOMEPAGE_SITE];
> if (!empty($CFG->enabledashboard)) {
> $choices[] = HOMEPAGE_MY;
> }
> $choices[] = HOMEPAGE_MYCOURSES;
> $preferences['user_home_page_preference'] = [
> 'type' => PARAM_INT,
> 'null' => NULL_ALLOWED,
> 'default' => get_default_home_page(),
> 'choices' => $choices,
'permissioncallback' => function ($user, $preferencename) {
< global $CFG, $USER;
< return $user->id == $USER->id &&
> global $CFG;
> return self::is_current_user($user) &&
(!empty($CFG->defaulthomepage) && ($CFG->defaulthomepage == HOMEPAGE_USER));
}
< );
> ];
// Core components that may want to define their preferences.
// List of core components implementing callback is hardcoded here for performance reasons.
// TODO MDL-58184 cache list of core components implementing a function.
$corecomponents = ['core_message', 'core_calendar', 'core_contentbank'];
foreach ($corecomponents as $component) {
if (($pluginpreferences = component_callback($component, 'user_preferences')) && is_array($pluginpreferences)) {
$preferences += $pluginpreferences;
}
}
// Plugins that may define their preferences.
if ($pluginsfunction = get_plugins_with_function('user_preferences')) {
foreach ($pluginsfunction as $plugintype => $plugins) {
foreach ($plugins as $function) {
if (($pluginpreferences = call_user_func($function)) && is_array($pluginpreferences)) {
$preferences += $pluginpreferences;
}
}
}
}
self::$preferencescache = $preferences;
}
/**
* Retrieves the preference definition
*
* @param string $preferencename
* @return array
*/
protected static function get_preference_definition($preferencename) {
self::fill_preferences_cache();
foreach (self::$preferencescache as $key => $preference) {
if (empty($preference['isregex'])) {
if ($key === $preferencename) {
return $preference;
}
} else {
if (preg_match($key, $preferencename)) {
return $preference;
}
}
}
throw new coding_exception('Invalid preference requested.');
}
/**
* Default callback used for checking if current user is allowed to change permission of user $user
*
* @param stdClass $user
* @param string $preferencename
* @return bool
*/
protected static function default_preference_permission_check($user, $preferencename) {
global $USER;
if (is_mnet_remote_user($user)) {
// Can't edit MNET user.
return false;
}
< if ($user->id == $USER->id) {
> if (self::is_current_user($user)) {
// Editing own profile.
$systemcontext = context_system::instance();
return has_capability('moodle/user:editownprofile', $systemcontext);
} else {
// Teachers, parents, etc.
$personalcontext = context_user::instance($user->id);
if (!has_capability('moodle/user:editprofile', $personalcontext)) {
return false;
}
if (is_siteadmin($user->id) and !is_siteadmin($USER)) {
// Only admins may edit other admins.
return false;
}
return true;
}
}
/**
* Can current user edit preference of this/another user
*
* @param string $preferencename
* @param stdClass $user
* @return bool
*/
public static function can_edit_preference($preferencename, $user) {
if (!isloggedin() || isguestuser()) {
// Guests can not edit anything.
return false;
}
try {
$definition = self::get_preference_definition($preferencename);
} catch (coding_exception $e) {
return false;
}
if ($user->deleted || !context_user::instance($user->id, IGNORE_MISSING)) {
// User is deleted.
return false;
}
if (isset($definition['permissioncallback'])) {
$callback = $definition['permissioncallback'];
if (is_callable($callback)) {
return call_user_func_array($callback, [$user, $preferencename]);
} else {
throw new coding_exception('Permission callback for preference ' . s($preferencename) . ' is not callable');
return false;
}
} else {
return self::default_preference_permission_check($user, $preferencename);
}
}
/**
* Clean value of a user preference
*
* @param string $value the user preference value to be cleaned.
* @param string $preferencename the user preference name
* @return string the cleaned preference value
*/
public static function clean_preference($value, $preferencename) {
$definition = self::get_preference_definition($preferencename);
if (isset($definition['type']) && $value !== null) {
$value = clean_param($value, $definition['type']);
}
if (isset($definition['cleancallback'])) {
$callback = $definition['cleancallback'];
if (is_callable($callback)) {
return $callback($value, $preferencename);
} else {
throw new coding_exception('Clean callback for preference ' . s($preferencename) . ' is not callable');
}
} else if ($value === null && (!isset($definition['null']) || $definition['null'] == NULL_ALLOWED)) {
return null;
} else if (isset($definition['choices'])) {
if (!in_array($value, $definition['choices'])) {
if (isset($definition['default'])) {
return $definition['default'];
} else {
$first = reset($definition['choices']);
return $first;
}
} else {
return $value;
}
} else {
if ($value === null) {
return isset($definition['default']) ? $definition['default'] : '';
}
return $value;
}
> }
}
>
> /**
}
> * Is the user expected to perform an action to start using Moodle properly?
> *
> * This covers cases such as filling the profile, changing password or agreeing to the site policy.
> *
> * @param stdClass $user User object, defaults to the current user.
> * @return bool
> */
> public static function awaiting_action(stdClass $user = null): bool {
> global $USER;
>
> if ($user === null) {
> $user = $USER;
> }
>
> if (user_not_fully_set_up($user)) {
> // Awaiting the user to fill all fields in the profile.
> return true;
> }
>
> if (get_user_preferences('auth_forcepasswordchange', false, $user)) {
> // Awaiting the user to change their password.
> return true;
> }
>
> if (empty($user->policyagreed) && !is_siteadmin($user)) {
> $manager = new \core_privacy\local\sitepolicy\manager();
>
> if ($manager->is_defined(isguestuser($user))) {
> return true;
> }
> }
>
> return false;
> }
>
> /**
> * Get welcome message.
> *
> * @return lang_string welcome message
> */
> public static function welcome_message(): ?lang_string {
> global $USER;
>
> $isloggedinas = \core\session\manager::is_loggedinas();
> if (!isloggedin() || isguestuser() || $isloggedinas) {
> return null;
> }
> if (empty($USER->core_welcome_message)) {
> $USER->core_welcome_message = true;
> $messagekey = 'welcomeback';
> if (empty(get_user_preferences('core_user_welcome', null))) {
> $messagekey = 'welcometosite';
> set_user_preference('core_user_welcome', time());
> }
>
> $namefields = [
> 'fullname' => fullname($USER),
> 'alternativefullname' => fullname($USER, true),
> ];
>
> foreach (\core_user\fields::get_name_fields() as $namefield) {
> $namefields[$namefield] = $USER->{$namefield};
> }
>
> return new lang_string($messagekey, 'core', $namefields);
> };
> return null;
> }
>
> /**
> * Return full name depending on context.
> * This function should be used for displaying purposes only as the details may not be the same as it is on database.
> *
> * @param stdClass $user the person to get details of.
> * @param context|null $context The context will be used to determine the visibility of the user's full name.
> * @param array $options can include: override - if true, will not use forced firstname/lastname settings
> * @return string Full name of the user
> */
> public static function get_fullname(stdClass $user, context $context = null, array $options = []): string {
> global $CFG, $SESSION;
>
> // Clone the user so that it does not mess up the original object.
> $user = clone($user);
>
> // Override options.
> $override = $options["override"] ?? false;
>
> if (!isset($user->firstname) && !isset($user->lastname)) {
> return '';
> }
>
> // Get all of the name fields.
> $allnames = \core_user\fields::get_name_fields();
> if ($CFG->debugdeveloper) {
> $missingfields = [];
> foreach ($allnames as $allname) {
> if (!property_exists($user, $allname)) {
> $missingfields[] = $allname;
> }
> }
> if (!empty($missingfields)) {
> debugging('The following name fields are missing from the user object: ' . implode(', ', $missingfields));
> }
> }
>
> if (!$override) {
> if (!empty($CFG->forcefirstname)) {
> $user->firstname = $CFG->forcefirstname;
> }
> if (!empty($CFG->forcelastname)) {
> $user->lastname = $CFG->forcelastname;
> }
> }
>
> if (!empty($SESSION->fullnamedisplay)) {
> $CFG->fullnamedisplay = $SESSION->fullnamedisplay;
> }
>
> $template = null;
> // If the fullnamedisplay setting is available, set the template to that.
> if (isset($CFG->fullnamedisplay)) {
> $template = $CFG->fullnamedisplay;
> }
> // If the template is empty, or set to language, return the language string.
> if ((empty($template) || $template == 'language') && !$override) {
> return get_string('fullnamedisplay', null, $user);
> }
>
> // Check to see if we are displaying according to the alternative full name format.
> if ($override) {
> if (empty($CFG->alternativefullnameformat) || $CFG->alternativefullnameformat == 'language') {
> // Default to show just the user names according to the fullnamedisplay string.
> return get_string('fullnamedisplay', null, $user);
> } else {
> // If the override is true, then change the template to use the complete name.
> $template = $CFG->alternativefullnameformat;
> }
> }
>
> $requirednames = array();
> // With each name, see if it is in the display name template, and add it to the required names array if it is.
> foreach ($allnames as $allname) {
> if (strpos($template, $allname) !== false) {
> $requirednames[] = $allname;
> }
> }
>
> $displayname = $template;
> // Switch in the actual data into the template.
> foreach ($requirednames as $altname) {
> if (isset($user->$altname)) {
> // Using empty() on the below if statement causes breakages.
> if ((string)$user->$altname == '') {
> $displayname = str_replace($altname, 'EMPTY', $displayname);
> } else {
> $displayname = str_replace($altname, $user->$altname, $displayname);
> }
> } else {
> $displayname = str_replace($altname, 'EMPTY', $displayname);
> }
> }
> // Tidy up any misc. characters (Not perfect, but gets most characters).
> // Don't remove the "u" at the end of the first expression unless you want garbled characters when combining hiragana or
> // katakana and parenthesis.
> $patterns = array();
> // This regular expression replacement is to fix problems such as 'James () Kirk' Where 'Tiberius' (middlename) has not been
> // filled in by a user.
> // The special characters are Japanese brackets that are common enough to make allowances for them (not covered by :punct:).
> $patterns[] = '/[[:punct:]「」]*EMPTY[[:punct:]「」]*/u';
> // This regular expression is to remove any double spaces in the display name.
> $patterns[] = '/\s{2,}/u';
> foreach ($patterns as $pattern) {
> $displayname = preg_replace($pattern, ' ', $displayname);
> }
>
> // Trimming $displayname will help the next check to ensure that we don't have a display name with spaces.
> $displayname = trim($displayname);
> if (empty($displayname)) {
> // Going with just the first name if no alternate fields are filled out. May be changed later depending on what
> // people in general feel is a good setting to fall back on.
> $displayname = $user->firstname;
> }
> return $displayname;
> }
>
> /**
> * Return profile url depending on context.
> *
> * @param stdClass $user the person to get details of.
> * @param context|null $context The context will be used to determine the visibility of the user's profile url.
> * @return moodle_url Profile url of the user
> */
> public static function get_profile_url(stdClass $user, context $context = null): moodle_url {
> if (empty($user->id)) {
> throw new coding_exception('User id is required when displaying profile url.');
> }
>
> // Params to be passed to the user view page.
> $params = ['id' => $user->id];
>
> // Get courseid if provided.
> if (isset($options['courseid'])) {
> $params['courseid'] = $options['courseid'];
> }
>
> // Get courseid from context if provided.
> if ($context) {
> $coursecontext = $context->get_course_context(false);
> if ($coursecontext) {
> $params['courseid'] = $coursecontext->instanceid;
> }
> }
>
> // If courseid is not set or is set to site id, then return profile page, otherwise return view page.
> if (!isset($params['courseid']) || $params['courseid'] == SITEID) {
> return new moodle_url('/user/profile.php', $params);
> } else {
> return new moodle_url('/user/view.php', $params);
> }
> }
>
> /**
> * Return user picture depending on context.
> * This function should be used for displaying purposes only as the details may not be the same as it is on database.
> *
> * @param stdClass $user the person to get details of.
> * @param context|null $context The context will be used to determine the visibility of the user's picture.
> * @param array $options public properties of {@see user_picture} to be overridden
> * - courseid = $this->page->course->id (course id of user profile in link)
> * - size = 35 (size of image)
> * - link = true (make image clickable - the link leads to user profile)
> * - popup = false (open in popup)
> * - alttext = true (add image alt attribute)
> * - class = image class attribute (default 'userpicture')
> * - visibletoscreenreaders = true (whether to be visible to screen readers)
> * - includefullname = false (whether to include the user's full name together with the user picture)
> * - includetoken = false (whether to use a token for authentication. True for current user, int value for other user id)
> * @return user_picture User picture object
> */
> public static function get_profile_picture(stdClass $user, context $context = null, array $options = []): user_picture {
> // Create a new user picture object.
> $userpicture = new user_picture($user);
>
> // Override the user picture object with the options provided.
> foreach ($options as $key => $value) {
> if (property_exists($userpicture, $key)) {
> $userpicture->$key = $value;
> }
> }
>
> // Return the user picture.
> return $userpicture;
> }
>
> /**
> * Get initials for users
> *
> * @param stdClass $user
> * @return string
> */
> public static function get_initials(stdClass $user): string {
> // Get the available name fields.
> $namefields = \core_user\fields::get_name_fields();
> // Build a dummy user to determine the name format.
> $dummyuser = array_combine($namefields, $namefields);
> // Determine the name format by using fullname() and passing the dummy user.
> $nameformat = fullname((object) $dummyuser);
> // Fetch all the available username fields.
> $availablefields = order_in_string($namefields, $nameformat);
> // We only want the first and last name fields.
> if (!empty($availablefields) && count($availablefields) >= 2) {
> $availablefields = [reset($availablefields), end($availablefields)];
> }
> $initials = '';
> foreach ($availablefields as $userfieldname) {
> if (!empty($user->$userfieldname)) {
> $initials .= mb_substr($user->$userfieldname, 0, 1);
> }
> }
> return $initials;
