user/externallib.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * External user API
  19  *
  20  * @package    core_user
  21  * @category   external
  22  * @copyright  2009 Petr Skodak
  23  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25
  26 defined('MOODLE_INTERNAL') || die();
  27
  28 require_once("$CFG->libdir/externallib.php");
  29
  30 /**
  31  * User external functions
  32  *
  33  * @package    core_user
  34  * @category   external
  35  * @copyright  2011 Jerome Mouneyrac
  36  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  37  * @since Moodle 2.2
  38  */
  39 class core_user_external extends external_api {
  40
  41     /**
  42      * Returns description of method parameters
  43      *
  44      * @return external_function_parameters
  45      * @since Moodle 2.2
  46      */
  47     public static function create_users_parameters() {
  48         global $CFG;
  49         $userfields = [
  50             'createpassword' => new external_value(PARAM_BOOL, 'True if password should be created and mailed to user.',
  51                 VALUE_OPTIONAL),
  52             // General.
  53             'username' => new external_value(core_user::get_property_type('username'),
  54                 'Username policy is defined in Moodle security config.'),
  55             'auth' => new external_value(core_user::get_property_type('auth'), 'Auth plugins include manual, ldap, etc',
  56                 VALUE_DEFAULT, 'manual', core_user::get_property_null('auth')),
  57             'password' => new external_value(core_user::get_property_type('password'),
  58                 'Plain text password consisting of any characters', VALUE_OPTIONAL),
  59             'firstname' => new external_value(core_user::get_property_type('firstname'), 'The first name(s) of the user'),
  60             'lastname' => new external_value(core_user::get_property_type('lastname'), 'The family name of the user'),
  61             'email' => new external_value(core_user::get_property_type('email'), 'A valid and unique email address'),
  62             'maildisplay' => new external_value(core_user::get_property_type('maildisplay'), 'Email display', VALUE_OPTIONAL),
  63             'city' => new external_value(core_user::get_property_type('city'), 'Home city of the user', VALUE_OPTIONAL),
  64             'country' => new external_value(core_user::get_property_type('country'),
  65                 'Home country code of the user, such as AU or CZ', VALUE_OPTIONAL),
  66             'timezone' => new external_value(core_user::get_property_type('timezone'),
  67                 'Timezone code such as Australia/Perth, or 99 for default', VALUE_OPTIONAL),
  68             'description' => new external_value(core_user::get_property_type('description'), 'User profile description, no HTML',
  69                 VALUE_OPTIONAL),
  70             // Additional names.
  71             'firstnamephonetic' => new external_value(core_user::get_property_type('firstnamephonetic'),
  72                 'The first name(s) phonetically of the user', VALUE_OPTIONAL),
  73             'lastnamephonetic' => new external_value(core_user::get_property_type('lastnamephonetic'),
  74                 'The family name phonetically of the user', VALUE_OPTIONAL),
  75             'middlename' => new external_value(core_user::get_property_type('middlename'), 'The middle name of the user',
  76                 VALUE_OPTIONAL),
  77             'alternatename' => new external_value(core_user::get_property_type('alternatename'), 'The alternate name of the user',
  78                 VALUE_OPTIONAL),
  79             // Interests.
  80             'interests' => new external_value(PARAM_TEXT, 'User interests (separated by commas)', VALUE_OPTIONAL),
  81             // Optional.
  82             'url' => new external_value(core_user::get_property_type('url'), 'User web page', VALUE_OPTIONAL),
  83             'icq' => new external_value(core_user::get_property_type('icq'), 'ICQ number', VALUE_OPTIONAL),
  84             'skype' => new external_value(core_user::get_property_type('skype'), 'Skype ID', VALUE_OPTIONAL),
  85             'aim' => new external_value(core_user::get_property_type('aim'), 'AIM ID', VALUE_OPTIONAL),
  86             'yahoo' => new external_value(core_user::get_property_type('yahoo'), 'Yahoo ID', VALUE_OPTIONAL),
  87             'msn' => new external_value(core_user::get_property_type('msn'), 'MSN ID', VALUE_OPTIONAL),
  88             'idnumber' => new external_value(core_user::get_property_type('idnumber'),
  89                 'An arbitrary ID code number perhaps from the institution', VALUE_DEFAULT, ''),
  90             'institution' => new external_value(core_user::get_property_type('institution'), 'institution', VALUE_OPTIONAL),
  91             'department' => new external_value(core_user::get_property_type('department'), 'department', VALUE_OPTIONAL),
  92             'phone1' => new external_value(core_user::get_property_type('phone1'), 'Phone 1', VALUE_OPTIONAL),
  93             'phone2' => new external_value(core_user::get_property_type('phone2'), 'Phone 2', VALUE_OPTIONAL),
  94             'address' => new external_value(core_user::get_property_type('address'), 'Postal address', VALUE_OPTIONAL),
  95             // Other user preferences stored in the user table.
  96             'lang' => new external_value(core_user::get_property_type('lang'), 'Language code such as "en", must exist on server',
  97                 VALUE_DEFAULT, core_user::get_property_default('lang'), core_user::get_property_null('lang')),
  98             'calendartype' => new external_value(core_user::get_property_type('calendartype'),
  99                 'Calendar type such as "gregorian", must exist on server', VALUE_DEFAULT, $CFG->calendartype, VALUE_OPTIONAL),
 100             'theme' => new external_value(core_user::get_property_type('theme'),
 101                 'Theme name such as "standard", must exist on server', VALUE_OPTIONAL),
 102             'mailformat' => new external_value(core_user::get_property_type('mailformat'),
 103                 'Mail format code is 0 for plain text, 1 for HTML etc', VALUE_OPTIONAL),
 104             // Custom user profile fields.
 105             'customfields' => new external_multiple_structure(
 106                 new external_single_structure(
 107                     [
 108                         'type'  => new external_value(PARAM_ALPHANUMEXT, 'The name of the custom field'),
 109                         'value' => new external_value(PARAM_RAW, 'The value of the custom field')
 110                     ]
 111                 ), 'User custom fields (also known as user profil fields)', VALUE_OPTIONAL),
 112             // User preferences.
 113             'preferences' => new external_multiple_structure(
 114             new external_single_structure(
 115                 [
 116                     'type'  => new external_value(PARAM_RAW, 'The name of the preference'),
 117                     'value' => new external_value(PARAM_RAW, 'The value of the preference')
 118                 ]
 119             ), 'User preferences', VALUE_OPTIONAL),
 120         ];
 121         return new external_function_parameters(
 122             [
 123                 'users' => new external_multiple_structure(
 124                     new external_single_structure($userfields)
 125                 )
 126             ]
 127         );
 128     }
 129
 130     /**
 131      * Create one or more users.
 132      *
 133      * @throws invalid_parameter_exception
 134      * @param array $users An array of users to create.
 135      * @return array An array of arrays
 136      * @since Moodle 2.2
 137      */
 138     public static function create_users($users) {
 139         global $CFG, $DB;
 140         require_once($CFG->dirroot."/lib/weblib.php");
 141         require_once($CFG->dirroot."/user/lib.php");
 142         require_once($CFG->dirroot."/user/editlib.php");
 143         require_once($CFG->dirroot."/user/profile/lib.php"); // Required for customfields related function.
 144
 145         // Ensure the current user is allowed to run this function.
 146         $context = context_system::instance();
 147         self::validate_context($context);
 148         require_capability('moodle/user:create', $context);
 149
 150         // Do basic automatic PARAM checks on incoming data, using params description.
 151         // If any problems are found then exceptions are thrown with helpful error messages.
 152         $params = self::validate_parameters(self::create_users_parameters(), array('users' => $users));
 153
 154         $availableauths  = core_component::get_plugin_list('auth');
 155         unset($availableauths['mnet']);       // These would need mnethostid too.
 156         unset($availableauths['webservice']); // We do not want new webservice users for now.
 157
 158         $availablethemes = core_component::get_plugin_list('theme');
 159         $availablelangs  = get_string_manager()->get_list_of_translations();
 160
 161         $transaction = $DB->start_delegated_transaction();
 162
 163         $userids = array();
 164         foreach ($params['users'] as $user) {
 165             // Make sure that the username, firstname and lastname are not blank.
 166             foreach (array('username', 'firstname', 'lastname') as $fieldname) {
 167                 if (trim($user[$fieldname]) === '') {
 168                     throw new invalid_parameter_exception('The field '.$fieldname.' cannot be blank');
 169                 }
 170             }
 171
 172             // Make sure that the username doesn't already exist.
 173             if ($DB->record_exists('user', array('username' => $user['username'], 'mnethostid' => $CFG->mnet_localhost_id))) {
 174                 throw new invalid_parameter_exception('Username already exists: '.$user['username']);
 175             }
 176
 177             // Make sure auth is valid.
 178             if (empty($availableauths[$user['auth']])) {
 179                 throw new invalid_parameter_exception('Invalid authentication type: '.$user['auth']);
 180             }
 181
 182             // Make sure lang is valid.
 183             if (empty($availablelangs[$user['lang']])) {
 184                 throw new invalid_parameter_exception('Invalid language code: '.$user['lang']);
 185             }
 186
 187             // Make sure lang is valid.
 188             if (!empty($user['theme']) && empty($availablethemes[$user['theme']])) { // Theme is VALUE_OPTIONAL,
 189                                                                                      // so no default value
 190                                                                                      // We need to test if the client sent it
 191                                                                                      // => !empty($user['theme']).
 192                 throw new invalid_parameter_exception('Invalid theme: '.$user['theme']);
 193             }
 194
 195             // Make sure we have a password or have to create one.
 196             $authplugin = get_auth_plugin($user['auth']);
 197             if ($authplugin->is_internal() && empty($user['password']) && empty($user['createpassword'])) {
 198                 throw new invalid_parameter_exception('Invalid password: you must provide a password, or set createpassword.');
 199             }
 200
 201             $user['confirmed'] = true;
 202             $user['mnethostid'] = $CFG->mnet_localhost_id;
 203
 204             // Start of user info validation.
 205             // Make sure we validate current user info as handled by current GUI. See user/editadvanced_form.php func validation().
 206             if (!validate_email($user['email'])) {
 207                 throw new invalid_parameter_exception('Email address is invalid: '.$user['email']);
 208             } else if (empty($CFG->allowaccountssameemail)) {
 209                 // Make a case-insensitive query for the given email address.
 210                 $select = $DB->sql_equal('email', ':email', false) . ' AND mnethostid = :mnethostid';
 211                 $params = array(
 212                     'email' => $user['email'],
 213                     'mnethostid' => $user['mnethostid']
 214                 );
 215                 // If there are other user(s) that already have the same email, throw an error.
 216                 if ($DB->record_exists_select('user', $select, $params)) {
 217                     throw new invalid_parameter_exception('Email address already exists: '.$user['email']);
 218                 }
 219             }
 220             // End of user info validation.
 221
 222             $createpassword = !empty($user['createpassword']);
 223             unset($user['createpassword']);
 224             $updatepassword = false;
 225             if ($authplugin->is_internal()) {
 226                 if ($createpassword) {
 227                     $user['password'] = '';
 228                 } else {
 229                     $updatepassword = true;
 230                 }
 231             } else {
 232                 $user['password'] = AUTH_PASSWORD_NOT_CACHED;
 233             }
 234
 235             // Create the user data now!
 236             $user['id'] = user_create_user($user, $updatepassword, false);
 237
 238             $userobject = (object)$user;
 239
 240             // Set user interests.
 241             if (!empty($user['interests'])) {
 242                 $trimmedinterests = array_map('trim', explode(',', $user['interests']));
 243                 $interests = array_filter($trimmedinterests, function($value) {
 244                     return !empty($value);
 245                 });
 246                 useredit_update_interests($userobject, $interests);
 247             }
 248
 249             // Custom fields.
 250             if (!empty($user['customfields'])) {
 251                 foreach ($user['customfields'] as $customfield) {
 252                     // Profile_save_data() saves profile file it's expecting a user with the correct id,
 253                     // and custom field to be named profile_field_"shortname".
 254                     $user["profile_field_".$customfield['type']] = $customfield['value'];
 255                 }
 256                 profile_save_data((object) $user);
 257             }
 258
 259             if ($createpassword) {
 260                 setnew_password_and_mail($userobject);
 261                 unset_user_preference('create_password', $userobject);
 262                 set_user_preference('auth_forcepasswordchange', 1, $userobject);
 263             }
 264
 265             // Trigger event.
 266             \core\event\user_created::create_from_userid($user['id'])->trigger();
 267
 268             // Preferences.
 269             if (!empty($user['preferences'])) {
 270                 $userpref = (object)$user;
 271                 foreach ($user['preferences'] as $preference) {
 272                     $userpref->{'preference_'.$preference['type']} = $preference['value'];
 273                 }
 274                 useredit_update_user_preference($userpref);
 275             }
 276
 277             $userids[] = array('id' => $user['id'], 'username' => $user['username']);
 278         }
 279
 280         $transaction->allow_commit();
 281
 282         return $userids;
 283     }
 284
 285     /**
 286      * Returns description of method result value
 287      *
 288      * @return external_description
 289      * @since Moodle 2.2
 290      */
 291     public static function create_users_returns() {
 292         return new external_multiple_structure(
 293             new external_single_structure(
 294                 array(
 295                     'id'       => new external_value(core_user::get_property_type('id'), 'user id'),
 296                     'username' => new external_value(core_user::get_property_type('username'), 'user name'),
 297                 )
 298             )
 299         );
 300     }
 301
 302
 303     /**
 304      * Returns description of method parameters
 305      *
 306      * @return external_function_parameters
 307      * @since Moodle 2.2
 308      */
 309     public static function delete_users_parameters() {
 310         return new external_function_parameters(
 311             array(
 312                 'userids' => new external_multiple_structure(new external_value(core_user::get_property_type('id'), 'user ID')),
 313             )
 314         );
 315     }
 316
 317     /**
 318      * Delete users
 319      *
 320      * @throws moodle_exception
 321      * @param array $userids
 322      * @return null
 323      * @since Moodle 2.2
 324      */
 325     public static function delete_users($userids) {
 326         global $CFG, $DB, $USER;
 327         require_once($CFG->dirroot."/user/lib.php");
 328
 329         // Ensure the current user is allowed to run this function.
 330         $context = context_system::instance();
 331         require_capability('moodle/user:delete', $context);
 332         self::validate_context($context);
 333
 334         $params = self::validate_parameters(self::delete_users_parameters(), array('userids' => $userids));
 335
 336         $transaction = $DB->start_delegated_transaction();
 337
 338         foreach ($params['userids'] as $userid) {
 339             $user = $DB->get_record('user', array('id' => $userid, 'deleted' => 0), '*', MUST_EXIST);
 340             // Must not allow deleting of admins or self!!!
 341             if (is_siteadmin($user)) {
 342                 throw new moodle_exception('useradminodelete', 'error');
 343             }
 344             if ($USER->id == $user->id) {
 345                 throw new moodle_exception('usernotdeletederror', 'error');
 346             }
 347             user_delete_user($user);
 348         }
 349
 350         $transaction->allow_commit();
 351
 352         return null;
 353     }
 354
 355     /**
 356      * Returns description of method result value
 357      *
 358      * @return null
 359      * @since Moodle 2.2
 360      */
 361     public static function delete_users_returns() {
 362         return null;
 363     }
 364
 365     /**
 366      * Returns description of method parameters.
 367      *
 368      * @return external_function_parameters
 369      * @since Moodle 3.2
 370      */
 371     public static function update_user_preferences_parameters() {
 372         return new external_function_parameters(
 373             array(
 374                 'userid' => new external_value(PARAM_INT, 'id of the user, default to current user', VALUE_DEFAULT, 0),
 375                 'emailstop' => new external_value(core_user::get_property_type('emailstop'),
 376                     'Enable or disable notifications for this user', VALUE_DEFAULT, null),
 377                 'preferences' => new external_multiple_structure(
 378                     new external_single_structure(
 379                         array(
 380                             'type'  => new external_value(PARAM_RAW, 'The name of the preference'),
 381                             'value' => new external_value(PARAM_RAW, 'The value of the preference, do not set this field if you
 382                                 want to remove (unset) the current value.', VALUE_DEFAULT, null),
 383                         )
 384                     ), 'User preferences', VALUE_DEFAULT, array()
 385                 )
 386             )
 387         );
 388     }
 389
 390     /**
 391      * Update the user's preferences.
 392      *
 393      * @param int $userid
 394      * @param bool|null $emailstop
 395      * @param array $preferences
 396      * @return null
 397      * @since Moodle 3.2
 398      */
 399     public static function update_user_preferences($userid = 0, $emailstop = null, $preferences = array()) {
 400         global $USER, $CFG;
 401
 402         require_once($CFG->dirroot . '/user/lib.php');
 403         require_once($CFG->dirroot . '/user/editlib.php');
 404         require_once($CFG->dirroot . '/message/lib.php');
 405
 406         if (empty($userid)) {
 407             $userid = $USER->id;
 408         }
 409
 410         $systemcontext = context_system::instance();
 411         self::validate_context($systemcontext);
 412         $params = array(
 413             'userid' => $userid,
 414             'emailstop' => $emailstop,
 415             'preferences' => $preferences
 416         );
 417         $params = self::validate_parameters(self::update_user_preferences_parameters(), $params);
 418         $preferences = $params['preferences'];
 419
 420         // Preferences.
 421         if (!empty($preferences)) {
 422             $userpref = ['id' => $userid];
 423             foreach ($preferences as $preference) {
 424                 $userpref['preference_' . $preference['type']] = $preference['value'];
 425             }
 426             useredit_update_user_preference($userpref);
 427         }
 428
 429         // Check if they want to update the email.
 430         if ($emailstop !== null) {
 431             $otheruser = ($userid == $USER->id) ? $USER : core_user::get_user($userid, '*', MUST_EXIST);
 432             core_user::require_active_user($otheruser);
 433             if (core_message_can_edit_message_profile($otheruser) && $otheruser->emailstop != $emailstop) {
 434                 $user = new stdClass();
 435                 $user->id = $userid;
 436                 $user->emailstop = $emailstop;
 437                 user_update_user($user);
 438
 439                 // Update the $USER if we should.
 440                 if ($userid == $USER->id) {
 441                     $USER->emailstop = $emailstop;
 442                 }
 443             }
 444         }
 445
 446         return null;
 447     }
 448
 449     /**
 450      * Returns description of method result value
 451      *
 452      * @return null
 453      * @since Moodle 3.2
 454      */
 455     public static function update_user_preferences_returns() {
 456         return null;
 457     }
 458
 459     /**
 460      * Returns description of method parameters
 461      *
 462      * @return external_function_parameters
 463      * @since Moodle 2.2
 464      */
 465     public static function update_users_parameters() {
 466         $userfields = [
 467             'id' => new external_value(core_user::get_property_type('id'), 'ID of the user'),
 468             // General.
 469             'username' => new external_value(core_user::get_property_type('username'),
 470                 'Username policy is defined in Moodle security config.', VALUE_OPTIONAL, '', NULL_NOT_ALLOWED),
 471             'auth' => new external_value(core_user::get_property_type('auth'), 'Auth plugins include manual, ldap, etc',
 472                 VALUE_OPTIONAL, '', NULL_NOT_ALLOWED),
 473             'suspended' => new external_value(core_user::get_property_type('suspended'),
 474                 'Suspend user account, either false to enable user login or true to disable it', VALUE_OPTIONAL),
 475             'password' => new external_value(core_user::get_property_type('password'),
 476                 'Plain text password consisting of any characters', VALUE_OPTIONAL, '', NULL_NOT_ALLOWED),
 477             'firstname' => new external_value(core_user::get_property_type('firstname'), 'The first name(s) of the user',
 478                 VALUE_OPTIONAL, '', NULL_NOT_ALLOWED),
 479             'lastname' => new external_value(core_user::get_property_type('lastname'), 'The family name of the user',
 480                 VALUE_OPTIONAL),
 481             'email' => new external_value(core_user::get_property_type('email'), 'A valid and unique email address', VALUE_OPTIONAL,
 482                 '', NULL_NOT_ALLOWED),
 483             'maildisplay' => new external_value(core_user::get_property_type('maildisplay'), 'Email display', VALUE_OPTIONAL),
 484             'city' => new external_value(core_user::get_property_type('city'), 'Home city of the user', VALUE_OPTIONAL),
 485             'country' => new external_value(core_user::get_property_type('country'),
 486                 'Home country code of the user, such as AU or CZ', VALUE_OPTIONAL),
 487             'timezone' => new external_value(core_user::get_property_type('timezone'),
 488                 'Timezone code such as Australia/Perth, or 99 for default', VALUE_OPTIONAL),
 489             'description' => new external_value(core_user::get_property_type('description'), 'User profile description, no HTML',
 490                 VALUE_OPTIONAL),
 491             // User picture.
 492             'userpicture' => new external_value(PARAM_INT,
 493                 'The itemid where the new user picture has been uploaded to, 0 to delete', VALUE_OPTIONAL),
 494             // Additional names.
 495             'firstnamephonetic' => new external_value(core_user::get_property_type('firstnamephonetic'),
 496                 'The first name(s) phonetically of the user', VALUE_OPTIONAL),
 497             'lastnamephonetic' => new external_value(core_user::get_property_type('lastnamephonetic'),
 498                 'The family name phonetically of the user', VALUE_OPTIONAL),
 499             'middlename' => new external_value(core_user::get_property_type('middlename'), 'The middle name of the user',
 500                 VALUE_OPTIONAL),
 501             'alternatename' => new external_value(core_user::get_property_type('alternatename'), 'The alternate name of the user',
 502                 VALUE_OPTIONAL),
 503             // Interests.
 504             'interests' => new external_value(PARAM_TEXT, 'User interests (separated by commas)', VALUE_OPTIONAL),
 505             // Optional.
 506             'url' => new external_value(core_user::get_property_type('url'), 'User web page', VALUE_OPTIONAL),
 507             'icq' => new external_value(core_user::get_property_type('icq'), 'ICQ number', VALUE_OPTIONAL),
 508             'skype' => new external_value(core_user::get_property_type('skype'), 'Skype ID', VALUE_OPTIONAL),
 509             'aim' => new external_value(core_user::get_property_type('aim'), 'AIM ID', VALUE_OPTIONAL),
 510             'yahoo' => new external_value(core_user::get_property_type('yahoo'), 'Yahoo ID', VALUE_OPTIONAL),
 511             'msn' => new external_value(core_user::get_property_type('msn'), 'MSN ID', VALUE_OPTIONAL),
 512             'idnumber' => new external_value(core_user::get_property_type('idnumber'),
 513                 'An arbitrary ID code number perhaps from the institution', VALUE_OPTIONAL),
 514             'institution' => new external_value(core_user::get_property_type('institution'), 'Institution', VALUE_OPTIONAL),
 515             'department' => new external_value(core_user::get_property_type('department'), 'Department', VALUE_OPTIONAL),
 516             'phone1' => new external_value(core_user::get_property_type('phone1'), 'Phone', VALUE_OPTIONAL),
 517             'phone2' => new external_value(core_user::get_property_type('phone2'), 'Mobile phone', VALUE_OPTIONAL),
 518             'address' => new external_value(core_user::get_property_type('address'), 'Postal address', VALUE_OPTIONAL),
 519             // Other user preferences stored in the user table.
 520             'lang' => new external_value(core_user::get_property_type('lang'), 'Language code such as "en", must exist on server',
 521                 VALUE_OPTIONAL, '', NULL_NOT_ALLOWED),
 522             'calendartype' => new external_value(core_user::get_property_type('calendartype'),
 523                 'Calendar type such as "gregorian", must exist on server', VALUE_OPTIONAL, '', NULL_NOT_ALLOWED),
 524             'theme' => new external_value(core_user::get_property_type('theme'),
 525                 'Theme name such as "standard", must exist on server', VALUE_OPTIONAL),
 526             'mailformat' => new external_value(core_user::get_property_type('mailformat'),
 527                 'Mail format code is 0 for plain text, 1 for HTML etc', VALUE_OPTIONAL),
 528             // Custom user profile fields.
 529             'customfields' => new external_multiple_structure(
 530                 new external_single_structure(
 531                     [
 532                         'type'  => new external_value(PARAM_ALPHANUMEXT, 'The name of the custom field'),
 533                         'value' => new external_value(PARAM_RAW, 'The value of the custom field')
 534                     ]
 535                 ), 'User custom fields (also known as user profil fields)', VALUE_OPTIONAL),
 536             // User preferences.
 537             'preferences' => new external_multiple_structure(
 538                 new external_single_structure(
 539                     [
 540                         'type'  => new external_value(PARAM_RAW, 'The name of the preference'),
 541                         'value' => new external_value(PARAM_RAW, 'The value of the preference')
 542                     ]
 543                 ), 'User preferences', VALUE_OPTIONAL),
 544         ];
 545         return new external_function_parameters(
 546             [
 547                 'users' => new external_multiple_structure(
 548                     new external_single_structure($userfields)
 549                 )
 550             ]
 551         );
 552     }
 553
 554     /**
 555      * Update users
 556      *
 557      * @param array $users
 558      * @return null
 559      * @since Moodle 2.2
 560      */
 561     public static function update_users($users) {
 562         global $CFG, $DB, $USER;
 563         require_once($CFG->dirroot."/user/lib.php");
 564         require_once($CFG->dirroot."/user/profile/lib.php"); // Required for customfields related function.
 565         require_once($CFG->dirroot.'/user/editlib.php');
 566
 567         // Ensure the current user is allowed to run this function.
 568         $context = context_system::instance();
 569         require_capability('moodle/user:update', $context);
 570         self::validate_context($context);
 571
 572         $params = self::validate_parameters(self::update_users_parameters(), array('users' => $users));
 573
 574         $filemanageroptions = array('maxbytes' => $CFG->maxbytes,
 575                 'subdirs'        => 0,
 576                 'maxfiles'       => 1,
 577                 'accepted_types' => 'web_image');
 578
 579         $transaction = $DB->start_delegated_transaction();
 580
 581         foreach ($params['users'] as $user) {
 582             // First check the user exists.
 583             if (!$existinguser = core_user::get_user($user['id'])) {
 584                 continue;
 585             }
 586             // Check if we are trying to update an admin.
 587             if ($existinguser->id != $USER->id and is_siteadmin($existinguser) and !is_siteadmin($USER)) {
 588                 continue;
 589             }
 590             // Other checks (deleted, remote or guest users).
 591             if ($existinguser->deleted or is_mnet_remote_user($existinguser) or isguestuser($existinguser->id)) {
 592                 continue;
 593             }
 594             // Check duplicated emails.
 595             if (isset($user['email']) && $user['email'] !== $existinguser->email) {
 596                 if (!validate_email($user['email'])) {
 597                     continue;
 598                 } else if (empty($CFG->allowaccountssameemail)) {
 599                     // Make a case-insensitive query for the given email address and make sure to exclude the user being updated.
 600                     $select = $DB->sql_equal('email', ':email', false) . ' AND mnethostid = :mnethostid AND id <> :userid';
 601                     $params = array(
 602                         'email' => $user['email'],
 603                         'mnethostid' => $CFG->mnet_localhost_id,
 604                         'userid' => $user['id']
 605                     );
 606                     // Skip if there are other user(s) that already have the same email.
 607                     if ($DB->record_exists_select('user', $select, $params)) {
 608                         continue;
 609                     }
 610                 }
 611             }
 612
 613             user_update_user($user, true, false);
 614
 615             $userobject = (object)$user;
 616
 617             // Update user picture if it was specified for this user.
 618             if (empty($CFG->disableuserimages) && isset($user['userpicture'])) {
 619                 $userobject->deletepicture = null;
 620
 621                 if ($user['userpicture'] == 0) {
 622                     $userobject->deletepicture = true;
 623                 } else {
 624                     $userobject->imagefile = $user['userpicture'];
 625                 }
 626
 627                 core_user::update_picture($userobject, $filemanageroptions);
 628             }
 629
 630             // Update user interests.
 631             if (!empty($user['interests'])) {
 632                 $trimmedinterests = array_map('trim', explode(',', $user['interests']));
 633                 $interests = array_filter($trimmedinterests, function($value) {
 634                     return !empty($value);
 635                 });
 636                 useredit_update_interests($userobject, $interests);
 637             }
 638
 639             // Update user custom fields.
 640             if (!empty($user['customfields'])) {
 641
 642                 foreach ($user['customfields'] as $customfield) {
 643                     // Profile_save_data() saves profile file it's expecting a user with the correct id,
 644                     // and custom field to be named profile_field_"shortname".
 645                     $user["profile_field_".$customfield['type']] = $customfield['value'];
 646                 }
 647                 profile_save_data((object) $user);
 648             }
 649
 650             // Trigger event.
 651             \core\event\user_updated::create_from_userid($user['id'])->trigger();
 652
 653             // Preferences.
 654             if (!empty($user['preferences'])) {
 655                 $userpref = clone($existinguser);
 656                 foreach ($user['preferences'] as $preference) {
 657                     $userpref->{'preference_'.$preference['type']} = $preference['value'];
 658                 }
 659                 useredit_update_user_preference($userpref);
 660             }
 661             if (isset($user['suspended']) and $user['suspended']) {
 662                 \core\session\manager::kill_user_sessions($user['id']);
 663             }
 664         }
 665
 666         $transaction->allow_commit();
 667
 668         return null;
 669     }
 670
 671     /**
 672      * Returns description of method result value
 673      *
 674      * @return null
 675      * @since Moodle 2.2
 676      */
 677     public static function update_users_returns() {
 678         return null;
 679     }
 680
 681     /**
 682      * Returns description of method parameters
 683      *
 684      * @return external_function_parameters
 685      * @since Moodle 2.4
 686      */
 687     public static function get_users_by_field_parameters() {
 688         return new external_function_parameters(
 689             array(
 690                 'field' => new external_value(PARAM_ALPHA, 'the search field can be
 691                     \'id\' or \'idnumber\' or \'username\' or \'email\''),
 692                 'values' => new external_multiple_structure(
 693                         new external_value(PARAM_RAW, 'the value to match'))
 694             )
 695         );
 696     }
 697
 698     /**
 699      * Get user information for a unique field.
 700      *
 701      * @throws coding_exception
 702      * @throws invalid_parameter_exception
 703      * @param string $field
 704      * @param array $values
 705      * @return array An array of arrays containg user profiles.
 706      * @since Moodle 2.4
 707      */
 708     public static function get_users_by_field($field, $values) {
 709         global $CFG, $USER, $DB;
 710         require_once($CFG->dirroot . "/user/lib.php");
 711
 712         $params = self::validate_parameters(self::get_users_by_field_parameters(),
 713                 array('field' => $field, 'values' => $values));
 714
 715         // This array will keep all the users that are allowed to be searched,
 716         // according to the current user's privileges.
 717         $cleanedvalues = array();
 718
 719         switch ($field) {
 720             case 'id':
 721                 $paramtype = core_user::get_property_type('id');
 722                 break;
 723             case 'idnumber':
 724                 $paramtype = core_user::get_property_type('idnumber');
 725                 break;
 726             case 'username':
 727                 $paramtype = core_user::get_property_type('username');
 728                 break;
 729             case 'email':
 730                 $paramtype = core_user::get_property_type('email');
 731                 break;
 732             default:
 733                 throw new coding_exception('invalid field parameter',
 734                         'The search field \'' . $field . '\' is not supported, look at the web service documentation');
 735         }
 736
 737         // Clean the values.
 738         foreach ($values as $value) {
 739             $cleanedvalue = clean_param($value, $paramtype);
 740             if ( $value != $cleanedvalue) {
 741                 throw new invalid_parameter_exception('The field \'' . $field .
 742                         '\' value is invalid: ' . $value . '(cleaned value: '.$cleanedvalue.')');
 743             }
 744             $cleanedvalues[] = $cleanedvalue;
 745         }
 746
 747         // Retrieve the users.
 748         $users = $DB->get_records_list('user', $field, $cleanedvalues, 'id');
 749
 750         $context = context_system::instance();
 751         self::validate_context($context);
 752
 753         // Finally retrieve each users information.
 754         $returnedusers = array();
 755         foreach ($users as $user) {
 756             $userdetails = user_get_user_details_courses($user);
 757
 758             // Return the user only if the searched field is returned.
 759             // Otherwise it means that the $USER was not allowed to search the returned user.
 760             if (!empty($userdetails) and !empty($userdetails[$field])) {
 761                 $returnedusers[] = $userdetails;
 762             }
 763         }
 764
 765         return $returnedusers;
 766     }
 767
 768     /**
 769      * Returns description of method result value
 770      *
 771      * @return external_multiple_structure
 772      * @since Moodle 2.4
 773      */
 774     public static function get_users_by_field_returns() {
 775         return new external_multiple_structure(self::user_description());
 776     }
 777
 778
 779     /**
 780      * Returns description of get_users() parameters.
 781      *
 782      * @return external_function_parameters
 783      * @since Moodle 2.5
 784      */
 785     public static function get_users_parameters() {
 786         return new external_function_parameters(
 787             array(
 788                 'criteria' => new external_multiple_structure(
 789                     new external_single_structure(
 790                         array(
 791                             'key' => new external_value(PARAM_ALPHA, 'the user column to search, expected keys (value format) are:
 792                                 "id" (int) matching user id,
 793                                 "lastname" (string) user last name (Note: you can use % for searching but it may be considerably slower!),
 794                                 "firstname" (string) user first name (Note: you can use % for searching but it may be considerably slower!),
 795                                 "idnumber" (string) matching user idnumber,
 796                                 "username" (string) matching user username,
 797                                 "email" (string) user email (Note: you can use % for searching but it may be considerably slower!),
 798                                 "auth" (string) matching user auth plugin'),
 799                             'value' => new external_value(PARAM_RAW, 'the value to search')
 800                         )
 801                     ), 'the key/value pairs to be considered in user search. Values can not be empty.
 802                         Specify different keys only once (fullname => \'user1\', auth => \'manual\', ...) -
 803                         key occurences are forbidden.
 804                         The search is executed with AND operator on the criterias. Invalid criterias (keys) are ignored,
 805                         the search is still executed on the valid criterias.
 806                         You can search without criteria, but the function is not designed for it.
 807                         It could very slow or timeout. The function is designed to search some specific users.'
 808                 )
 809             )
 810         );
 811     }
 812
 813     /**
 814      * Retrieve matching user.
 815      *
 816      * @throws moodle_exception
 817      * @param array $criteria the allowed array keys are id/lastname/firstname/idnumber/username/email/auth.
 818      * @return array An array of arrays containing user profiles.
 819      * @since Moodle 2.5
 820      */
 821     public static function get_users($criteria = array()) {
 822         global $CFG, $USER, $DB;
 823
 824         require_once($CFG->dirroot . "/user/lib.php");
 825
 826         $params = self::validate_parameters(self::get_users_parameters(),
 827                 array('criteria' => $criteria));
 828
 829         // Validate the criteria and retrieve the users.
 830         $users = array();
 831         $warnings = array();
 832         $sqlparams = array();
 833         $usedkeys = array();
 834
 835         // Do not retrieve deleted users.
 836         $sql = ' deleted = 0';
 837
 838         foreach ($params['criteria'] as $criteriaindex => $criteria) {
 839
 840             // Check that the criteria has never been used.
 841             if (array_key_exists($criteria['key'], $usedkeys)) {
 842                 throw new moodle_exception('keyalreadyset', '', '', null, 'The key ' . $criteria['key'] . ' can only be sent once');
 843             } else {
 844                 $usedkeys[$criteria['key']] = true;
 845             }
 846
 847             $invalidcriteria = false;
 848             // Clean the parameters.
 849             $paramtype = PARAM_RAW;
 850             switch ($criteria['key']) {
 851                 case 'id':
 852                     $paramtype = core_user::get_property_type('id');
 853                     break;
 854                 case 'idnumber':
 855                     $paramtype = core_user::get_property_type('idnumber');
 856                     break;
 857                 case 'username':
 858                     $paramtype = core_user::get_property_type('username');
 859                     break;
 860                 case 'email':
 861                     // We use PARAM_RAW to allow searches with %.
 862                     $paramtype = core_user::get_property_type('email');
 863                     break;
 864                 case 'auth':
 865                     $paramtype = core_user::get_property_type('auth');
 866                     break;
 867                 case 'lastname':
 868                 case 'firstname':
 869                     $paramtype = core_user::get_property_type('firstname');
 870                     break;
 871                 default:
 872                     // Send back a warning that this search key is not supported in this version.
 873                     // This warning will make the function extandable without breaking clients.
 874                     $warnings[] = array(
 875                         'item' => $criteria['key'],
 876                         'warningcode' => 'invalidfieldparameter',
 877                         'message' =>
 878                             'The search key \'' . $criteria['key'] . '\' is not supported, look at the web service documentation'
 879                     );
 880                     // Do not add this invalid criteria to the created SQL request.
 881                     $invalidcriteria = true;
 882                     unset($params['criteria'][$criteriaindex]);
 883                     break;
 884             }
 885
 886             if (!$invalidcriteria) {
 887                 $cleanedvalue = clean_param($criteria['value'], $paramtype);
 888
 889                 $sql .= ' AND ';
 890
 891                 // Create the SQL.
 892                 switch ($criteria['key']) {
 893                     case 'id':
 894                     case 'idnumber':
 895                     case 'username':
 896                     case 'auth':
 897                         $sql .= $criteria['key'] . ' = :' . $criteria['key'];
 898                         $sqlparams[$criteria['key']] = $cleanedvalue;
 899                         break;
 900                     case 'email':
 901                     case 'lastname':
 902                     case 'firstname':
 903                         $sql .= $DB->sql_like($criteria['key'], ':' . $criteria['key'], false);
 904                         $sqlparams[$criteria['key']] = $cleanedvalue;
 905                         break;
 906                     default:
 907                         break;
 908                 }
 909             }
 910         }
 911
 912         $users = $DB->get_records_select('user', $sql, $sqlparams, 'id ASC');
 913
 914         // Finally retrieve each users information.
 915         $returnedusers = array();
 916         foreach ($users as $user) {
 917             $userdetails = user_get_user_details_courses($user);
 918
 919             // Return the user only if all the searched fields are returned.
 920             // Otherwise it means that the $USER was not allowed to search the returned user.
 921             if (!empty($userdetails)) {
 922                 $validuser = true;
 923
 924                 foreach ($params['criteria'] as $criteria) {
 925                     if (empty($userdetails[$criteria['key']])) {
 926                         $validuser = false;
 927                     }
 928                 }
 929
 930                 if ($validuser) {
 931                     $returnedusers[] = $userdetails;
 932                 }
 933             }
 934         }
 935
 936         return array('users' => $returnedusers, 'warnings' => $warnings);
 937     }
 938
 939     /**
 940      * Returns description of get_users result value.
 941      *
 942      * @return external_description
 943      * @since Moodle 2.5
 944      */
 945     public static function get_users_returns() {
 946         return new external_single_structure(
 947             array('users' => new external_multiple_structure(
 948                                 self::user_description()
 949                              ),
 950                   'warnings' => new external_warnings('always set to \'key\'', 'faulty key name')
 951             )
 952         );
 953     }
 954
 955     /**
 956      * Returns description of method parameters
 957      *
 958      * @return external_function_parameters
 959      * @since Moodle 2.2
 960      */
 961     public static function get_course_user_profiles_parameters() {
 962         return new external_function_parameters(
 963             array(
 964                 'userlist' => new external_multiple_structure(
 965                     new external_single_structure(
 966                         array(
 967                             'userid'    => new external_value(core_user::get_property_type('id'), 'userid'),
 968                             'courseid'    => new external_value(PARAM_INT, 'courseid'),
 969                         )
 970                     )
 971                 )
 972             )
 973         );
 974     }
 975
 976     /**
 977      * Get course participant's details
 978      *
 979      * @param array $userlist  array of user ids and according course ids
 980      * @return array An array of arrays describing course participants
 981      * @since Moodle 2.2
 982      */
 983     public static function get_course_user_profiles($userlist) {
 984         global $CFG, $USER, $DB;
 985         require_once($CFG->dirroot . "/user/lib.php");
 986         $params = self::validate_parameters(self::get_course_user_profiles_parameters(), array('userlist' => $userlist));
 987
 988         $userids = array();
 989         $courseids = array();
 990         foreach ($params['userlist'] as $value) {
 991             $userids[] = $value['userid'];
 992             $courseids[$value['userid']] = $value['courseid'];
 993         }
 994
 995         // Cache all courses.
 996         $courses = array();
 997         list($sqlcourseids, $params) = $DB->get_in_or_equal(array_unique($courseids), SQL_PARAMS_NAMED);
 998         $cselect = ', ' . context_helper::get_preload_record_columns_sql('ctx');
 999         $cjoin = "LEFT JOIN {context} ctx ON (ctx.instanceid = c.id AND ctx.contextlevel = :contextlevel)";
1000         $params['contextlevel'] = CONTEXT_COURSE;
1001         $coursesql = "SELECT c.* $cselect
1002                         FROM {course} c $cjoin
1003                        WHERE c.id $sqlcourseids";
1004         $rs = $DB->get_recordset_sql($coursesql, $params);
1005         foreach ($rs as $course) {
1006             // Adding course contexts to cache.
1007             context_helper::preload_from_record($course);
1008             // Cache courses.
1009             $courses[$course->id] = $course;
1010         }
1011         $rs->close();
1012
1013         list($sqluserids, $params) = $DB->get_in_or_equal($userids, SQL_PARAMS_NAMED);
1014         $uselect = ', ' . context_helper::get_preload_record_columns_sql('ctx');
1015         $ujoin = "LEFT JOIN {context} ctx ON (ctx.instanceid = u.id AND ctx.contextlevel = :contextlevel)";
1016         $params['contextlevel'] = CONTEXT_USER;
1017         $usersql = "SELECT u.* $uselect
1018                       FROM {user} u $ujoin
1019                      WHERE u.id $sqluserids";
1020         $users = $DB->get_recordset_sql($usersql, $params);
1021         $result = array();
1022         foreach ($users as $user) {
1023             if (!empty($user->deleted)) {
1024                 continue;
1025             }
1026             context_helper::preload_from_record($user);
1027             $course = $courses[$courseids[$user->id]];
1028             $context = context_course::instance($courseids[$user->id], IGNORE_MISSING);
1029             self::validate_context($context);
1030             if ($userarray = user_get_user_details($user, $course)) {
1031                 $result[] = $userarray;
1032             }
1033         }
1034
1035         $users->close();
1036
1037         return $result;
1038     }
1039
1040     /**
1041      * Returns description of method result value
1042      *
1043      * @return external_description
1044      * @since Moodle 2.2
1045      */
1046     public static function get_course_user_profiles_returns() {
1047         $additionalfields = array(
1048             'groups' => new external_multiple_structure(
1049                 new external_single_structure(
1050                     array(
1051                         'id'  => new external_value(PARAM_INT, 'group id'),
1052                         'name' => new external_value(PARAM_RAW, 'group name'),
1053                         'description' => new external_value(PARAM_RAW, 'group description'),
1054                         'descriptionformat' => new external_format_value('description'),
1055                     )
1056                 ), 'user groups', VALUE_OPTIONAL),
1057             'roles' => new external_multiple_structure(
1058                 new external_single_structure(
1059                     array(
1060                         'roleid'       => new external_value(PARAM_INT, 'role id'),
1061                         'name'         => new external_value(PARAM_RAW, 'role name'),
1062                         'shortname'    => new external_value(PARAM_ALPHANUMEXT, 'role shortname'),
1063                         'sortorder'    => new external_value(PARAM_INT, 'role sortorder')
1064                     )
1065                 ), 'user roles', VALUE_OPTIONAL),
1066             'enrolledcourses' => new external_multiple_structure(
1067                 new external_single_structure(
1068                     array(
1069                         'id'  => new external_value(PARAM_INT, 'Id of the course'),
1070                         'fullname'  => new external_value(PARAM_RAW, 'Fullname of the course'),
1071                         'shortname' => new external_value(PARAM_RAW, 'Shortname of the course')
1072                     )
1073                 ), 'Courses where the user is enrolled - limited by which courses the user is able to see', VALUE_OPTIONAL)
1074         );
1075
1076         return new external_multiple_structure(self::user_description($additionalfields));
1077     }
1078
1079     /**
1080      * Create user return value description.
1081      *
1082      * @param array $additionalfields some additional field
1083      * @return single_structure_description
1084      */
1085     public static function user_description($additionalfields = array()) {
1086         $userfields = array(
1087             'id'    => new external_value(core_user::get_property_type('id'), 'ID of the user'),
1088             'username'    => new external_value(core_user::get_property_type('username'), 'The username', VALUE_OPTIONAL),
1089             'firstname'   => new external_value(core_user::get_property_type('firstname'), 'The first name(s) of the user', VALUE_OPTIONAL),
1090             'lastname'    => new external_value(core_user::get_property_type('lastname'), 'The family name of the user', VALUE_OPTIONAL),
1091             'fullname'    => new external_value(core_user::get_property_type('firstname'), 'The fullname of the user'),
1092             'email'       => new external_value(core_user::get_property_type('email'), 'An email address - allow email as root@localhost', VALUE_OPTIONAL),
1093             'address'     => new external_value(core_user::get_property_type('address'), 'Postal address', VALUE_OPTIONAL),
1094             'phone1'      => new external_value(core_user::get_property_type('phone1'), 'Phone 1', VALUE_OPTIONAL),
1095             'phone2'      => new external_value(core_user::get_property_type('phone2'), 'Phone 2', VALUE_OPTIONAL),
1096             'icq'         => new external_value(core_user::get_property_type('icq'), 'icq number', VALUE_OPTIONAL),
1097             'skype'       => new external_value(core_user::get_property_type('skype'), 'skype id', VALUE_OPTIONAL),
1098             'yahoo'       => new external_value(core_user::get_property_type('yahoo'), 'yahoo id', VALUE_OPTIONAL),
1099             'aim'         => new external_value(core_user::get_property_type('aim'), 'aim id', VALUE_OPTIONAL),
1100             'msn'         => new external_value(core_user::get_property_type('msn'), 'msn number', VALUE_OPTIONAL),
1101             'department'  => new external_value(core_user::get_property_type('department'), 'department', VALUE_OPTIONAL),
1102             'institution' => new external_value(core_user::get_property_type('institution'), 'institution', VALUE_OPTIONAL),
1103             'idnumber'    => new external_value(core_user::get_property_type('idnumber'), 'An arbitrary ID code number perhaps from the institution', VALUE_OPTIONAL),
1104             'interests'   => new external_value(PARAM_TEXT, 'user interests (separated by commas)', VALUE_OPTIONAL),
1105             'firstaccess' => new external_value(core_user::get_property_type('firstaccess'), 'first access to the site (0 if never)', VALUE_OPTIONAL),
1106             'lastaccess'  => new external_value(core_user::get_property_type('lastaccess'), 'last access to the site (0 if never)', VALUE_OPTIONAL),
1107             'auth'        => new external_value(core_user::get_property_type('auth'), 'Auth plugins include manual, ldap, etc', VALUE_OPTIONAL),
1108             'suspended'   => new external_value(core_user::get_property_type('suspended'), 'Suspend user account, either false to enable user login or true to disable it', VALUE_OPTIONAL),
1109             'confirmed'   => new external_value(core_user::get_property_type('confirmed'), 'Active user: 1 if confirmed, 0 otherwise', VALUE_OPTIONAL),
1110             'lang'        => new external_value(core_user::get_property_type('lang'), 'Language code such as "en", must exist on server', VALUE_OPTIONAL),
1111             'calendartype' => new external_value(core_user::get_property_type('calendartype'), 'Calendar type such as "gregorian", must exist on server', VALUE_OPTIONAL),
1112             'theme'       => new external_value(core_user::get_property_type('theme'), 'Theme name such as "standard", must exist on server', VALUE_OPTIONAL),
1113             'timezone'    => new external_value(core_user::get_property_type('timezone'), 'Timezone code such as Australia/Perth, or 99 for default', VALUE_OPTIONAL),
1114             'mailformat'  => new external_value(core_user::get_property_type('mailformat'), 'Mail format code is 0 for plain text, 1 for HTML etc', VALUE_OPTIONAL),
1115             'description' => new external_value(core_user::get_property_type('description'), 'User profile description', VALUE_OPTIONAL),
1116             'descriptionformat' => new external_format_value(core_user::get_property_type('descriptionformat'), VALUE_OPTIONAL),
1117             'city'        => new external_value(core_user::get_property_type('city'), 'Home city of the user', VALUE_OPTIONAL),
1118             'url'         => new external_value(core_user::get_property_type('url'), 'URL of the user', VALUE_OPTIONAL),
1119             'country'     => new external_value(core_user::get_property_type('country'), 'Home country code of the user, such as AU or CZ', VALUE_OPTIONAL),
1120             'profileimageurlsmall' => new external_value(PARAM_URL, 'User image profile URL - small version'),
1121             'profileimageurl' => new external_value(PARAM_URL, 'User image profile URL - big version'),
1122             'customfields' => new external_multiple_structure(
1123                 new external_single_structure(
1124                     array(
1125                         'type'  => new external_value(PARAM_ALPHANUMEXT, 'The type of the custom field - text field, checkbox...'),
1126                         'value' => new external_value(PARAM_RAW, 'The value of the custom field'),
1127                         'name' => new external_value(PARAM_RAW, 'The name of the custom field'),
1128                         'shortname' => new external_value(PARAM_RAW, 'The shortname of the custom field - to be able to build the field class in the code'),
1129                     )
1130                 ), 'User custom fields (also known as user profile fields)', VALUE_OPTIONAL),
1131             'preferences' => new external_multiple_structure(
1132                 new external_single_structure(
1133                     array(
1134                         'name'  => new external_value(PARAM_RAW, 'The name of the preferences'),
1135                         'value' => new external_value(PARAM_RAW, 'The value of the preference'),
1136                     )
1137             ), 'Users preferences', VALUE_OPTIONAL)
1138         );
1139         if (!empty($additionalfields)) {
1140             $userfields = array_merge($userfields, $additionalfields);
1141         }
1142         return new external_single_structure($userfields);
1143     }
1144
1145     /**
1146      * Returns description of method parameters
1147      *
1148      * @return external_function_parameters
1149      * @since Moodle 2.6
1150      */
1151     public static function add_user_private_files_parameters() {
1152         return new external_function_parameters(
1153             array(
1154                 'draftid' => new external_value(PARAM_INT, 'draft area id')
1155             )
1156         );
1157     }
1158
1159     /**
1160      * Copy files from a draft area to users private files area.
1161      *
1162      * @throws invalid_parameter_exception
1163      * @param int $draftid Id of a draft area containing files.
1164      * @return array An array of warnings
1165      * @since Moodle 2.6
1166      */
1167     public static function add_user_private_files($draftid) {
1168         global $CFG, $USER;
1169         require_once($CFG->libdir . "/filelib.php");
1170
1171         $params = self::validate_parameters(self::add_user_private_files_parameters(), array('draftid' => $draftid));
1172
1173         if (isguestuser()) {
1174             throw new invalid_parameter_exception('Guest users cannot upload files');
1175         }
1176
1177         $context = context_user::instance($USER->id);
1178         require_capability('moodle/user:manageownfiles', $context);
1179
1180         $maxbytes = $CFG->userquota;
1181         $maxareabytes = $CFG->userquota;
1182         if (has_capability('moodle/user:ignoreuserquota', $context)) {
1183             $maxbytes = USER_CAN_IGNORE_FILE_SIZE_LIMITS;
1184             $maxareabytes = FILE_AREA_MAX_BYTES_UNLIMITED;
1185         }
1186
1187         $options = array('subdirs' => 1,
1188                          'maxbytes' => $maxbytes,
1189                          'maxfiles' => -1,
1190                          'areamaxbytes' => $maxareabytes);
1191
1192         file_merge_files_from_draft_area_into_filearea($draftid, $context->id, 'user', 'private', 0, $options);
1193
1194         return null;
1195     }
1196
1197     /**
1198      * Returns description of method result value
1199      *
1200      * @return external_description
1201      * @since Moodle 2.2
1202      */
1203     public static function add_user_private_files_returns() {
1204         return null;
1205     }
1206
1207     /**
1208      * Returns description of method parameters.
1209      *
1210      * @return external_function_parameters
1211      * @since Moodle 2.6
1212      */
1213     public static function add_user_device_parameters() {
1214         return new external_function_parameters(
1215             array(
1216                 'appid'     => new external_value(PARAM_NOTAGS, 'the app id, usually something like com.moodle.moodlemobile'),
1217                 'name'      => new external_value(PARAM_NOTAGS, 'the device name, \'occam\' or \'iPhone\' etc.'),
1218                 'model'     => new external_value(PARAM_NOTAGS, 'the device model \'Nexus4\' or \'iPad1,1\' etc.'),
1219                 'platform'  => new external_value(PARAM_NOTAGS, 'the device platform \'iOS\' or \'Android\' etc.'),
1220                 'version'   => new external_value(PARAM_NOTAGS, 'the device version \'6.1.2\' or \'4.2.2\' etc.'),
1221                 'pushid'    => new external_value(PARAM_RAW, 'the device PUSH token/key/identifier/registration id'),
1222                 'uuid'      => new external_value(PARAM_RAW, 'the device UUID')
1223             )
1224         );
1225     }
1226
1227     /**
1228      * Add a user device in Moodle database (for PUSH notifications usually).
1229      *
1230      * @throws moodle_exception
1231      * @param string $appid The app id, usually something like com.moodle.moodlemobile.
1232      * @param string $name The device name, occam or iPhone etc.
1233      * @param string $model The device model Nexus4 or iPad1.1 etc.
1234      * @param string $platform The device platform iOs or Android etc.
1235      * @param string $version The device version 6.1.2 or 4.2.2 etc.
1236      * @param string $pushid The device PUSH token/key/identifier/registration id.
1237      * @param string $uuid The device UUID.
1238      * @return array List of possible warnings.
1239      * @since Moodle 2.6
1240      */
1241     public static function add_user_device($appid, $name, $model, $platform, $version, $pushid, $uuid) {
1242         global $CFG, $USER, $DB;
1243         require_once($CFG->dirroot . "/user/lib.php");
1244
1245         $params = self::validate_parameters(self::add_user_device_parameters(),
1246                 array('appid' => $appid,
1247                       'name' => $name,
1248                       'model' => $model,
1249                       'platform' => $platform,
1250                       'version' => $version,
1251                       'pushid' => $pushid,
1252                       'uuid' => $uuid
1253                       ));
1254
1255         $warnings = array();
1256
1257         // Prevent duplicate keys for users.
1258         if ($DB->get_record('user_devices', array('pushid' => $params['pushid'], 'userid' => $USER->id))) {
1259             $warnings['warning'][] = array(
1260                 'item' => $params['pushid'],
1261                 'warningcode' => 'existingkeyforthisuser',
1262                 'message' => 'This key is already stored for this user'
1263             );
1264             return $warnings;
1265         }
1266
1267         // Notice that we can have multiple devices because previously it was allowed to have repeated ones.
1268         // Since we don't have a clear way to decide which one is the more appropiate, we update all.
1269         if ($userdevices = $DB->get_records('user_devices', array('uuid' => $params['uuid'],
1270                 'appid' => $params['appid'], 'userid' => $USER->id))) {
1271
1272             foreach ($userdevices as $userdevice) {
1273                 $userdevice->version    = $params['version'];   // Maybe the user upgraded the device.
1274                 $userdevice->pushid     = $params['pushid'];
1275                 $userdevice->timemodified  = time();
1276                 $DB->update_record('user_devices', $userdevice);
1277             }
1278
1279         } else {
1280             $userdevice = new stdclass;
1281             $userdevice->userid     = $USER->id;
1282             $userdevice->appid      = $params['appid'];
1283             $userdevice->name       = $params['name'];
1284             $userdevice->model      = $params['model'];
1285             $userdevice->platform   = $params['platform'];
1286             $userdevice->version    = $params['version'];
1287             $userdevice->pushid     = $params['pushid'];
1288             $userdevice->uuid       = $params['uuid'];
1289             $userdevice->timecreated  = time();
1290             $userdevice->timemodified = $userdevice->timecreated;
1291
1292             if (!$DB->insert_record('user_devices', $userdevice)) {
1293                 throw new moodle_exception("There was a problem saving in the database the device with key: " . $params['pushid']);
1294             }
1295         }
1296
1297         return $warnings;
1298     }
1299
1300     /**
1301      * Returns description of method result value.
1302      *
1303      * @return external_multiple_structure
1304      * @since Moodle 2.6
1305      */
1306     public static function add_user_device_returns() {
1307         return new external_multiple_structure(
1308            new external_warnings()
1309         );
1310     }
1311
1312     /**
1313      * Returns description of method parameters.
1314      *
1315      * @return external_function_parameters
1316      * @since Moodle 2.9
1317      */
1318     public static function remove_user_device_parameters() {
1319         return new external_function_parameters(
1320             array(
1321                 'uuid'  => new external_value(PARAM_RAW, 'the device UUID'),
1322                 'appid' => new external_value(PARAM_NOTAGS,
1323                                                 'the app id, if empty devices matching the UUID for the user will be removed',
1324                                                 VALUE_DEFAULT, ''),
1325             )
1326         );
1327     }
1328
1329     /**
1330      * Remove a user device from the Moodle database (for PUSH notifications usually).
1331      *
1332      * @param string $uuid The device UUID.
1333      * @param string $appid The app id, opitonal parameter. If empty all the devices fmatching the UUID or the user will be removed.
1334      * @return array List of possible warnings and removal status.
1335      * @since Moodle 2.9
1336      */
1337     public static function remove_user_device($uuid, $appid = "") {
1338         global $CFG;
1339         require_once($CFG->dirroot . "/user/lib.php");
1340
1341         $params = self::validate_parameters(self::remove_user_device_parameters(), array('uuid' => $uuid, 'appid' => $appid));
1342
1343         $context = context_system::instance();
1344         self::validate_context($context);
1345
1346         // Warnings array, it can be empty at the end but is mandatory.
1347         $warnings = array();
1348
1349         $removed = user_remove_user_device($params['uuid'], $params['appid']);
1350
1351         if (!$removed) {
1352             $warnings[] = array(
1353                 'item' => $params['uuid'],
1354                 'warningcode' => 'devicedoesnotexist',
1355                 'message' => 'The device doesn\'t exists in the database'
1356             );
1357         }
1358
1359         $result = array(
1360             'removed' => $removed,
1361             'warnings' => $warnings
1362         );
1363
1364         return $result;
1365     }
1366
1367     /**
1368      * Returns description of method result value.
1369      *
1370      * @return external_multiple_structure
1371      * @since Moodle 2.9
1372      */
1373     public static function remove_user_device_returns() {
1374         return new external_single_structure(
1375             array(
1376                 'removed' => new external_value(PARAM_BOOL, 'True if removed, false if not removed because it doesn\'t exists'),
1377                 'warnings' => new external_warnings(),
1378             )
1379         );
1380     }
1381
1382     /**
1383      * Returns description of method parameters
1384      *
1385      * @return external_function_parameters
1386      * @since Moodle 2.9
1387      */
1388     public static function view_user_list_parameters() {
1389         return new external_function_parameters(
1390             array(
1391                 'courseid' => new external_value(PARAM_INT, 'id of the course, 0 for site')
1392             )
1393         );
1394     }
1395
1396     /**
1397      * Trigger the user_list_viewed event.
1398      *
1399      * @param int $courseid id of course
1400      * @return array of warnings and status result
1401      * @since Moodle 2.9
1402      * @throws moodle_exception
1403      */
1404     public static function view_user_list($courseid) {
1405         global $CFG;
1406         require_once($CFG->dirroot . "/user/lib.php");
1407         require_once($CFG->dirroot . '/course/lib.php');
1408
1409         $params = self::validate_parameters(self::view_user_list_parameters(),
1410                                             array(
1411                                                 'courseid' => $courseid
1412                                             ));
1413
1414         $warnings = array();
1415
1416         if (empty($params['courseid'])) {
1417             $params['courseid'] = SITEID;
1418         }
1419
1420         $course = get_course($params['courseid']);
1421
1422         if ($course->id == SITEID) {
1423             $context = context_system::instance();
1424         } else {
1425             $context = context_course::instance($course->id);
1426         }
1427         self::validate_context($context);
1428
1429         course_require_view_participants($context);
1430
1431         user_list_view($course, $context);
1432
1433         $result = array();
1434         $result['status'] = true;
1435         $result['warnings'] = $warnings;
1436         return $result;
1437     }
1438
1439     /**
1440      * Returns description of method result value
1441      *
1442      * @return external_description
1443      * @since Moodle 2.9
1444      */
1445     public static function view_user_list_returns() {
1446         return new external_single_structure(
1447             array(
1448                 'status' => new external_value(PARAM_BOOL, 'status: true if success'),
1449                 'warnings' => new external_warnings()
1450             )
1451         );
1452     }
1453
1454     /**
1455      * Returns description of method parameters
1456      *
1457      * @return external_function_parameters
1458      * @since Moodle 2.9
1459      */
1460     public static function view_user_profile_parameters() {
1461         return new external_function_parameters(
1462             array(
1463                 'userid' => new external_value(PARAM_INT, 'id of the user, 0 for current user', VALUE_REQUIRED),
1464                 'courseid' => new external_value(PARAM_INT, 'id of the course, default site course', VALUE_DEFAULT, 0)
1465             )
1466         );
1467     }
1468
1469     /**
1470      * Trigger the user profile viewed event.
1471      *
1472      * @param int $userid id of user
1473      * @param int $courseid id of course
1474      * @return array of warnings and status result
1475      * @since Moodle 2.9
1476      * @throws moodle_exception
1477      */
1478     public static function view_user_profile($userid, $courseid = 0) {
1479         global $CFG, $USER;
1480         require_once($CFG->dirroot . "/user/profile/lib.php");
1481
1482         $params = self::validate_parameters(self::view_user_profile_parameters(),
1483                                             array(
1484                                                 'userid' => $userid,
1485                                                 'courseid' => $courseid
1486                                             ));
1487
1488         $warnings = array();
1489
1490         if (empty($params['userid'])) {
1491             $params['userid'] = $USER->id;
1492         }
1493
1494         if (empty($params['courseid'])) {
1495             $params['courseid'] = SITEID;
1496         }
1497
1498         $course = get_course($params['courseid']);
1499         $user = core_user::get_user($params['userid'], '*', MUST_EXIST);
1500         core_user::require_active_user($user);
1501
1502         if ($course->id == SITEID) {
1503             $coursecontext = context_system::instance();;
1504         } else {
1505             $coursecontext = context_course::instance($course->id);
1506         }
1507         self::validate_context($coursecontext);
1508
1509         $currentuser = $USER->id == $user->id;
1510         $usercontext = context_user::instance($user->id);
1511
1512         if (!$currentuser and
1513                 !has_capability('moodle/user:viewdetails', $coursecontext) and
1514                 !has_capability('moodle/user:viewdetails', $usercontext)) {
1515             throw new moodle_exception('cannotviewprofile');
1516         }
1517
1518         // Case like user/profile.php.
1519         if ($course->id == SITEID) {
1520             profile_view($user, $usercontext);
1521         } else {
1522             // Case like user/view.php.
1523             if (!$currentuser and !can_access_course($course, $user, '', true)) {
1524                 throw new moodle_exception('notenrolledprofile');
1525             }
1526
1527             profile_view($user, $coursecontext, $course);
1528         }
1529
1530         $result = array();
1531         $result['status'] = true;
1532         $result['warnings'] = $warnings;
1533         return $result;
1534     }
1535
1536     /**
1537      * Returns description of method result value
1538      *
1539      * @return external_description
1540      * @since Moodle 2.9
1541      */
1542     public static function view_user_profile_returns() {
1543         return new external_single_structure(
1544             array(
1545                 'status' => new external_value(PARAM_BOOL, 'status: true if success'),
1546                 'warnings' => new external_warnings()
1547             )
1548         );
1549     }
1550
1551     /**
1552      * Returns description of method parameters
1553      *
1554      * @return external_function_parameters
1555      * @since Moodle 3.2
1556      */
1557     public static function get_user_preferences_parameters() {
1558         return new external_function_parameters(
1559             array(
1560                 'name' => new external_value(PARAM_RAW, 'preference name, empty for all', VALUE_DEFAULT, ''),
1561                 'userid' => new external_value(PARAM_INT, 'id of the user, default to current user', VALUE_DEFAULT, 0)
1562             )
1563         );
1564     }
1565
1566     /**
1567      * Return user preferences.
1568      *
1569      * @param string $name preference name, empty for all
1570      * @param int $userid id of the user, 0 for current user
1571      * @return array of warnings and preferences
1572      * @since Moodle 3.2
1573      * @throws moodle_exception
1574      */
1575     public static function get_user_preferences($name = '', $userid = 0) {
1576         global $USER;
1577
1578         $params = self::validate_parameters(self::get_user_preferences_parameters(),
1579                                             array(
1580                                                 'name' => $name,
1581                                                 'userid' => $userid
1582                                             ));
1583         $preferences = array();
1584         $warnings = array();
1585
1586         $context = context_system::instance();
1587         self::validate_context($context);
1588
1589         if (empty($params['name'])) {
1590             $name = null;
1591         }
1592         if (empty($params['userid'])) {
1593             $user = null;
1594         } else {
1595             $user = core_user::get_user($params['userid'], '*', MUST_EXIST);
1596             core_user::require_active_user($user);
1597             if ($user->id != $USER->id) {
1598                 // Only admins can retrieve other users preferences.
1599                 require_capability('moodle/site:config', $context);
1600             }
1601         }
1602
1603         $userpreferences = get_user_preferences($name, null, $user);
1604         // Check if we received just one preference.
1605         if (!is_array($userpreferences)) {
1606             $userpreferences = array($name => $userpreferences);
1607         }
1608
1609         foreach ($userpreferences as $name => $value) {
1610             $preferences[] = array(
1611                 'name' => $name,
1612                 'value' => $value,
1613             );
1614         }
1615
1616         $result = array();
1617         $result['preferences'] = $preferences;
1618         $result['warnings'] = $warnings;
1619         return $result;
1620     }
1621
1622     /**
1623      * Returns description of method result value
1624      *
1625      * @return external_description
1626      * @since Moodle 3.2
1627      */
1628     public static function get_user_preferences_returns() {
1629         return new external_single_structure(
1630             array(
1631                 'preferences' => new external_multiple_structure(
1632                     new external_single_structure(
1633                         array(
1634                             'name' => new external_value(PARAM_RAW, 'The name of the preference'),
1635                             'value' => new external_value(PARAM_RAW, 'The value of the preference'),
1636                         )
1637                     ),
1638                     'User custom fields (also known as user profile fields)'
1639                 ),
1640                 'warnings' => new external_warnings()
1641             )
1642         );
1643     }
1644
1645     /**
1646      * Returns description of method parameters
1647      *
1648      * @return external_function_parameters
1649      * @since Moodle 3.2
1650      */
1651     public static function update_picture_parameters() {
1652         return new external_function_parameters(
1653             array(
1654                 'draftitemid' => new external_value(PARAM_INT, 'Id of the user draft file to use as image'),
1655                 'delete' => new external_value(PARAM_BOOL, 'If we should delete the user picture', VALUE_DEFAULT, false),
1656                 'userid' => new external_value(PARAM_INT, 'Id of the user, 0 for current user', VALUE_DEFAULT, 0)
1657             )
1658         );
1659     }
1660
1661     /**
1662      * Update or delete the user picture in the site
1663      *
1664      * @param  int  $draftitemid id of the user draft file to use as image
1665      * @param  bool $delete      if we should delete the user picture
1666      * @param  int $userid       id of the user, 0 for current user
1667      * @return array warnings and success status
1668      * @since Moodle 3.2
1669      * @throws moodle_exception
1670      */
1671     public static function update_picture($draftitemid, $delete = false, $userid = 0) {
1672         global $CFG, $USER, $PAGE;
1673
1674         $params = self::validate_parameters(
1675             self::update_picture_parameters(),
1676             array(
1677                 'draftitemid' => $draftitemid,
1678                 'delete' => $delete,
1679                 'userid' => $userid
1680             )
1681         );
1682
1683         $context = context_system::instance();
1684         self::validate_context($context);
1685
1686         if (!empty($CFG->disableuserimages)) {
1687             throw new moodle_exception('userimagesdisabled', 'admin');
1688         }
1689
1690         if (empty($params['userid']) or $params['userid'] == $USER->id) {
1691             $user = $USER;
1692             require_capability('moodle/user:editownprofile', $context);
1693         } else {
1694             $user = core_user::get_user($params['userid'], '*', MUST_EXIST);
1695             core_user::require_active_user($user);
1696             $personalcontext = context_user::instance($user->id);
1697
1698             require_capability('moodle/user:editprofile', $personalcontext);
1699             if (is_siteadmin($user) and !is_siteadmin($USER)) {  // Only admins may edit other admins.
1700                 throw new moodle_exception('useradmineditadmin');
1701             }
1702         }
1703
1704         // Load the appropriate auth plugin.
1705         $userauth = get_auth_plugin($user->auth);
1706         if (is_mnet_remote_user($user) or !$userauth->can_edit_profile() or $userauth->edit_profile_url()) {
1707             throw new moodle_exception('noprofileedit', 'auth');
1708         }
1709
1710         $filemanageroptions = array('maxbytes' => $CFG->maxbytes, 'subdirs' => 0, 'maxfiles' => 1, 'accepted_types' => 'web_image');
1711         $user->deletepicture = $params['delete'];
1712         $user->imagefile = $params['draftitemid'];
1713         $success = core_user::update_picture($user, $filemanageroptions);
1714
1715         $result = array(
1716             'success' => $success,
1717             'warnings' => array(),
1718         );
1719         if ($success) {
1720             $userpicture = new user_picture(core_user::get_user($user->id));
1721             $userpicture->size = 1; // Size f1.
1722             $result['profileimageurl'] = $userpicture->get_url($PAGE)->out(false);
1723         }
1724         return $result;
1725     }
1726
1727     /**
1728      * Returns description of method result value
1729      *
1730      * @return external_description
1731      * @since Moodle 3.2
1732      */
1733     public static function update_picture_returns() {
1734         return new external_single_structure(
1735             array(
1736                 'success' => new external_value(PARAM_BOOL, 'True if the image was updated, false otherwise.'),
1737                 'profileimageurl' => new external_value(PARAM_URL, 'New profile user image url', VALUE_OPTIONAL),
1738                 'warnings' => new external_warnings()
1739             )
1740         );
1741     }
1742
1743     /**
1744      * Returns description of method parameters
1745      *
1746      * @return external_function_parameters
1747      * @since Moodle 3.2
1748      */
1749     public static function set_user_preferences_parameters() {
1750         return new external_function_parameters(
1751             array(
1752                 'preferences' => new external_multiple_structure(
1753                     new external_single_structure(
1754                         array(
1755                             'name' => new external_value(PARAM_RAW, 'The name of the preference'),
1756                             'value' => new external_value(PARAM_RAW, 'The value of the preference'),
1757                             'userid' => new external_value(PARAM_INT, 'Id of the user to set the preference'),
1758                         )
1759                     )
1760                 )
1761             )
1762         );
1763     }
1764
1765     /**
1766      * Set user preferences.
1767      *
1768      * @param array $preferences list of preferences including name, value and userid
1769      * @return array of warnings and preferences saved
1770      * @since Moodle 3.2
1771      * @throws moodle_exception
1772      */
1773     public static function set_user_preferences($preferences) {
1774         global $USER;
1775
1776         $params = self::validate_parameters(self::set_user_preferences_parameters(), array('preferences' => $preferences));
1777         $warnings = array();
1778         $saved = array();
1779
1780         $context = context_system::instance();
1781         self::validate_context($context);
1782
1783         $userscache = array();
1784         foreach ($params['preferences'] as $pref) {
1785             // Check to which user set the preference.
1786             if (!empty($userscache[$pref['userid']])) {
1787                 $user = $userscache[$pref['userid']];
1788             } else {
1789                 try {
1790                     $user = core_user::get_user($pref['userid'], '*', MUST_EXIST);
1791                     core_user::require_active_user($user);
1792                     $userscache[$pref['userid']] = $user;
1793                 } catch (Exception $e) {
1794                     $warnings[] = array(
1795                         'item' => 'user',
1796                         'itemid' => $pref['userid'],
1797                         'warningcode' => 'invaliduser',
1798                         'message' => $e->getMessage()
1799                     );
1800                     continue;
1801                 }
1802             }
1803
1804             try {
1805                 if (core_user::can_edit_preference($pref['name'], $user)) {
1806                     $value = core_user::clean_preference($pref['value'], $pref['name']);
1807                     set_user_preference($pref['name'], $value, $user->id);
1808                     $saved[] = array(
1809                         'name' => $pref['name'],
1810                         'userid' => $user->id,
1811                     );
1812                 } else {
1813                     $warnings[] = array(
1814                         'item' => 'user',
1815                         'itemid' => $user->id,
1816                         'warningcode' => 'nopermission',
1817                         'message' => 'You are not allowed to change the preference '.s($pref['name']).' for user '.$user->id
1818                     );
1819                 }
1820             } catch (Exception $e) {
1821                 $warnings[] = array(
1822                     'item' => 'user',
1823                     'itemid' => $user->id,
1824                     'warningcode' => 'errorsavingpreference',
1825                     'message' => $e->getMessage()
1826                 );
1827             }
1828         }
1829
1830         $result = array();
1831         $result['saved'] = $saved;
1832         $result['warnings'] = $warnings;
1833         return $result;
1834     }
1835
1836     /**
1837      * Returns description of method result value
1838      *
1839      * @return external_description
1840      * @since Moodle 3.2
1841      */
1842     public static function set_user_preferences_returns() {
1843         return new external_single_structure(
1844             array(
1845                 'saved' => new external_multiple_structure(
1846                     new external_single_structure(
1847                         array(
1848                             'name' => new external_value(PARAM_RAW, 'The name of the preference'),
1849                             'userid' => new external_value(PARAM_INT, 'The user the preference was set for'),
1850                         )
1851                     ), 'Preferences saved'
1852                 ),
1853                 'warnings' => new external_warnings()
1854             )
1855         );
1856     }
1857
1858     /**
1859      * Returns description of method parameters.
1860      *
1861      * @return external_function_parameters
1862      * @since Moodle 3.2
1863      */
1864     public static function agree_site_policy_parameters() {
1865         return new external_function_parameters(array());
1866     }
1867
1868     /**
1869      * Agree the site policy for the current user.
1870      *
1871      * @return array of warnings and status result
1872      * @since Moodle 3.2
1873      * @throws moodle_exception
1874      */
1875     public static function agree_site_policy() {
1876         global $CFG, $DB, $USER;
1877
1878         $warnings = array();
1879
1880         $context = context_system::instance();
1881         try {
1882             // We expect an exception here since the user didn't agree the site policy yet.
1883             self::validate_context($context);
1884         } catch (Exception $e) {
1885             // We are expecting only a sitepolicynotagreed exception.
1886             if (!($e instanceof moodle_exception) or $e->errorcode != 'sitepolicynotagreed') {
1887                 // In case we receive a different exception, throw it.
1888                 throw $e;
1889             }
1890         }
1891
1892         $manager = new \core_privacy\local\sitepolicy\manager();
1893         if (!empty($USER->policyagreed)) {
1894             $status = false;
1895             $warnings[] = array(
1896                 'item' => 'user',
1897                 'itemid' => $USER->id,
1898                 'warningcode' => 'alreadyagreed',
1899                 'message' => 'The user already agreed the site policy.'
1900             );
1901         } else if (!$manager->is_defined()) {
1902             $status = false;
1903             $warnings[] = array(
1904                 'item' => 'user',
1905                 'itemid' => $USER->id,
1906                 'warningcode' => 'nositepolicy',
1907                 'message' => 'The site does not have a site policy configured.'
1908             );
1909         } else {
1910             $status = $manager->accept();
1911         }
1912
1913         $result = array();
1914         $result['status'] = $status;
1915         $result['warnings'] = $warnings;
1916         return $result;
1917     }
1918
1919     /**
1920      * Returns description of method result value.
1921      *
1922      * @return external_description
1923      * @since Moodle 3.2
1924      */
1925     public static function agree_site_policy_returns() {
1926         return new external_single_structure(
1927             array(
1928                 'status' => new external_value(PARAM_BOOL, 'Status: true only if we set the policyagreed to 1 for the user'),
1929                 'warnings' => new external_warnings()
1930             )
1931         );
1932     }
1933
1934     /**
1935      * Returns description of method parameters.
1936      *
1937      * @return external_function_parameters
1938      * @since Moodle 3.4
1939      */
1940     public static function get_private_files_info_parameters() {
1941         return new external_function_parameters(
1942             array(
1943                 'userid' => new external_value(PARAM_INT, 'Id of the user, default to current user.', VALUE_DEFAULT, 0)
1944             )
1945         );
1946     }
1947
1948     /**
1949      * Returns general information about files in the user private files area.
1950      *
1951      * @param int $userid Id of the user, default to current user.
1952      * @return array of warnings and file area information
1953      * @since Moodle 3.4
1954      * @throws moodle_exception
1955      */
1956     public static function get_private_files_info($userid = 0) {
1957         global $CFG, $USER;
1958         require_once($CFG->libdir . '/filelib.php');
1959
1960         $params = self::validate_parameters(self::get_private_files_info_parameters(), array('userid' => $userid));
1961         $warnings = array();
1962
1963         $context = context_system::instance();
1964         self::validate_context($context);
1965
1966         if (empty($params['userid']) || $params['userid'] == $USER->id) {
1967             $usercontext = context_user::instance($USER->id);
1968             require_capability('moodle/user:manageownfiles', $usercontext);
1969         } else {
1970             $user = core_user::get_user($params['userid'], '*', MUST_EXIST);
1971             core_user::require_active_user($user);
1972             // Only admins can retrieve other users information.
1973             require_capability('moodle/site:config', $context);
1974             $usercontext = context_user::instance($user->id);
1975         }
1976
1977         $fileareainfo = file_get_file_area_info($usercontext->id, 'user', 'private');
1978
1979         $result = array();
1980         $result['filecount'] = $fileareainfo['filecount'];
1981         $result['foldercount'] = $fileareainfo['foldercount'];
1982         $result['filesize'] = $fileareainfo['filesize'];
1983         $result['filesizewithoutreferences'] = $fileareainfo['filesize_without_references'];
1984         $result['warnings'] = $warnings;
1985         return $result;
1986     }
1987
1988     /**
1989      * Returns description of method result value.
1990      *
1991      * @return external_description
1992      * @since Moodle 3.4
1993      */
1994     public static function get_private_files_info_returns() {
1995         return new external_single_structure(
1996             array(
1997                 'filecount' => new external_value(PARAM_INT, 'Number of files in the area.'),
1998                 'foldercount' => new external_value(PARAM_INT, 'Number of folders in the area.'),
1999                 'filesize' => new external_value(PARAM_INT, 'Total size of the files in the area.'),
2000                 'filesizewithoutreferences' => new external_value(PARAM_INT, 'Total size of the area excluding file references'),
2001                 'warnings' => new external_warnings()
2002             )
2003         );
2004     }
2005 }