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Developer Documentation

See Release Notes

  • Bug fixes for general core bugs in 3.11.x will end 14 Nov 2022 (12 months plus 6 months extension).
  • Bug fixes for security issues in 3.11.x will end 13 Nov 2023 (18 months plus 12 months extension).
  • PHP version: minimum PHP 7.3.0 Note: minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is supported too.

Differences Between: [Versions 310 and 311] [Versions 311 and 400] [Versions 311 and 401] [Versions 311 and 402] [Versions 311 and 403] [Versions 39 and 311]

   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   * Profile field API library file.
  19   *
  20   * @package core_user
  21   * @copyright  2007 onwards Shane Elliot {@link http://pukunui.com}
  22   * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  /**
  26   * Visible to anyone who has the moodle/site:viewuseridentity permission.
  27   * Editable by the profile owner if they have the moodle/user:editownprofile capability
  28   * or any user with the moodle/user:update capability.
  29   */
  30  define('PROFILE_VISIBLE_TEACHERS', '3');
  31  
  32  /**
  33   * Visible to anyone who can view the user.
  34   * Editable by the profile owner if they have the moodle/user:editownprofile capability
  35   * or any user with the moodle/user:update capability.
  36   */
  37  define('PROFILE_VISIBLE_ALL', '2');
  38  /**
  39   * Visible to the profile owner or anyone with the moodle/user:viewalldetails capability.
  40   * Editable by the profile owner if they have the moodle/user:editownprofile capability
  41   * or any user with moodle/user:viewalldetails and moodle/user:update capabilities.
  42   */
  43  define('PROFILE_VISIBLE_PRIVATE', '1');
  44  /**
  45   * Only visible to users with the moodle/user:viewalldetails capability.
  46   * Only editable by users with the moodle/user:viewalldetails and moodle/user:update capabilities.
  47   */
  48  define('PROFILE_VISIBLE_NONE', '0');
  49  
  50  /**
  51   * Base class for the customisable profile fields.
  52   *
  53   * @package core_user
  54   * @copyright  2007 onwards Shane Elliot {@link http://pukunui.com}
  55   * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  56   */
  57  class profile_field_base {
  58  
  59      // These 2 variables are really what we're interested in.
  60      // Everything else can be extracted from them.
  61  
  62      /** @var int */
  63      public $fieldid;
  64  
  65      /** @var int */
  66      public $userid;
  67  
  68      /** @var stdClass */
  69      public $field;
  70  
  71      /** @var string */
  72      public $inputname;
  73  
  74      /** @var mixed */
  75      public $data;
  76  
  77      /** @var string */
  78      public $dataformat;
  79  
  80      /** @var string name of the user profile category */
  81      protected $categoryname;
  82  
  83      /**
  84       * Constructor method.
  85       * @param int $fieldid id of the profile from the user_info_field table
  86       * @param int $userid id of the user for whom we are displaying data
  87       * @param stdClass $fielddata optional data for the field object plus additional fields 'hasuserdata', 'data' and 'dataformat'
  88       *    with user data. (If $fielddata->hasuserdata is empty, user data is not available and we should use default data).
  89       *    If this parameter is passed, constructor will not call load_data() at all.
  90       */
  91      public function __construct($fieldid=0, $userid=0, $fielddata=null) {
  92          global $CFG;
  93  
  94          if ($CFG->debugdeveloper) {
  95              // In Moodle 3.4 the new argument $fielddata was added to the constructor. Make sure that
  96              // plugin constructor properly passes this argument.
  97              $backtrace = debug_backtrace();
  98              if (isset($backtrace[1]['class']) && $backtrace[1]['function'] === '__construct' &&
  99                      in_array(self::class, class_parents($backtrace[1]['class']))) {
 100                  // If this constructor is called from the constructor of the plugin make sure that the third argument was passed through.
 101                  if (count($backtrace[1]['args']) >= 3 && count($backtrace[0]['args']) < 3) {
 102                      debugging($backtrace[1]['class'].'::__construct() must support $fielddata as the third argument ' .
 103                          'and pass it to the parent constructor', DEBUG_DEVELOPER);
 104                  }
 105              }
 106          }
 107  
 108          $this->set_fieldid($fieldid);
 109          $this->set_userid($userid);
 110          if ($fielddata) {
 111              $this->set_field($fielddata);
 112              if ($userid > 0 && !empty($fielddata->hasuserdata)) {
 113                  $this->set_user_data($fielddata->data, $fielddata->dataformat);
 114              }
 115          } else {
 116              $this->load_data();
 117          }
 118      }
 119  
 120      /**
 121       * Old syntax of class constructor. Deprecated in PHP7.
 122       *
 123       * @deprecated since Moodle 3.1
 124       */
 125      public function profile_field_base($fieldid=0, $userid=0) {
 126          debugging('Use of class name as constructor is deprecated', DEBUG_DEVELOPER);
 127          self::__construct($fieldid, $userid);
 128      }
 129  
 130      /**
 131       * Abstract method: Adds the profile field to the moodle form class
 132       * @abstract The following methods must be overwritten by child classes
 133       * @param MoodleQuickForm $mform instance of the moodleform class
 134       */
 135      public function edit_field_add($mform) {
 136          print_error('mustbeoveride', 'debug', '', 'edit_field_add');
 137      }
 138  
 139      /**
 140       * Display the data for this field
 141       * @return string
 142       */
 143      public function display_data() {
 144          $options = new stdClass();
 145          $options->para = false;
 146          return format_text($this->data, FORMAT_MOODLE, $options);
 147      }
 148  
 149      /**
 150       * Print out the form field in the edit profile page
 151       * @param MoodleQuickForm $mform instance of the moodleform class
 152       * @return bool
 153       */
 154      public function edit_field($mform) {
 155          if (!$this->is_editable()) {
 156              return false;
 157          }
 158  
 159          $this->edit_field_add($mform);
 160          $this->edit_field_set_default($mform);
 161          $this->edit_field_set_required($mform);
 162          return true;
 163      }
 164  
 165      /**
 166       * Tweaks the edit form
 167       * @param MoodleQuickForm $mform instance of the moodleform class
 168       * @return bool
 169       */
 170      public function edit_after_data($mform) {
 171          if (!$this->is_editable()) {
 172              return false;
 173          }
 174  
 175          $this->edit_field_set_locked($mform);
 176          return true;
 177      }
 178  
 179      /**
 180       * Saves the data coming from form
 181       * @param stdClass $usernew data coming from the form
 182       */
 183      public function edit_save_data($usernew) {
 184          global $DB;
 185  
 186          if (!isset($usernew->{$this->inputname})) {
 187              // Field not present in form, probably locked and invisible - skip it.
 188              return;
 189          }
 190  
 191          $data = new stdClass();
 192  
 193          $usernew->{$this->inputname} = $this->edit_save_data_preprocess($usernew->{$this->inputname}, $data);
 194          if (!isset($usernew->{$this->inputname})) {
 195              // Field cannot be set to null, set the default value.
 196              $usernew->{$this->inputname} = $this->field->defaultdata;
 197          }
 198  
 199          $data->userid  = $usernew->id;
 200          $data->fieldid = $this->field->id;
 201          $data->data    = $usernew->{$this->inputname};
 202  
 203          if ($dataid = $DB->get_field('user_info_data', 'id', array('userid' => $data->userid, 'fieldid' => $data->fieldid))) {
 204              $data->id = $dataid;
 205              $DB->update_record('user_info_data', $data);
 206          } else {
 207              $DB->insert_record('user_info_data', $data);
 208          }
 209      }
 210  
 211      /**
 212       * Validate the form field from profile page
 213       *
 214       * @param stdClass $usernew
 215       * @return  array  error messages for the form validation
 216       */
 217      public function edit_validate_field($usernew) {
 218          global $DB;
 219  
 220          $errors = array();
 221          // Get input value.
 222          if (isset($usernew->{$this->inputname})) {
 223              if (is_array($usernew->{$this->inputname}) && isset($usernew->{$this->inputname}['text'])) {
 224                  $value = $usernew->{$this->inputname}['text'];
 225              } else {
 226                  $value = $usernew->{$this->inputname};
 227              }
 228          } else {
 229              $value = '';
 230          }
 231  
 232          // Check for uniqueness of data if required.
 233          if ($this->is_unique() && (($value !== '') || $this->is_required())) {
 234              $data = $DB->get_records_sql('
 235                      SELECT id, userid
 236                        FROM {user_info_data}
 237                       WHERE fieldid = ?
 238                         AND ' . $DB->sql_compare_text('data', 255) . ' = ' . $DB->sql_compare_text('?', 255),
 239                      array($this->field->id, $value));
 240              if ($data) {
 241                  $existing = false;
 242                  foreach ($data as $v) {
 243                      if ($v->userid == $usernew->id) {
 244                          $existing = true;
 245                          break;
 246                      }
 247                  }
 248                  if (!$existing) {
 249                      $errors[$this->inputname] = get_string('valuealreadyused');
 250                  }
 251              }
 252          }
 253          return $errors;
 254      }
 255  
 256      /**
 257       * Sets the default data for the field in the form object
 258       * @param MoodleQuickForm $mform instance of the moodleform class
 259       */
 260      public function edit_field_set_default($mform) {
 261          if (!empty($this->field->defaultdata)) {
 262              $mform->setDefault($this->inputname, $this->field->defaultdata);
 263          }
 264      }
 265  
 266      /**
 267       * Sets the required flag for the field in the form object
 268       *
 269       * @param MoodleQuickForm $mform instance of the moodleform class
 270       */
 271      public function edit_field_set_required($mform) {
 272          global $USER;
 273          if ($this->is_required() && ($this->userid == $USER->id || isguestuser())) {
 274              $mform->addRule($this->inputname, get_string('required'), 'required', null, 'client');
 275          }
 276      }
 277  
 278      /**
 279       * HardFreeze the field if locked.
 280       * @param MoodleQuickForm $mform instance of the moodleform class
 281       */
 282      public function edit_field_set_locked($mform) {
 283          if (!$mform->elementExists($this->inputname)) {
 284              return;
 285          }
 286          if ($this->is_locked() and !has_capability('moodle/user:update', context_system::instance())) {
 287              $mform->hardFreeze($this->inputname);
 288              $mform->setConstant($this->inputname, $this->data);
 289          }
 290      }
 291  
 292      /**
 293       * Hook for child classess to process the data before it gets saved in database
 294       * @param stdClass $data
 295       * @param stdClass $datarecord The object that will be used to save the record
 296       * @return  mixed
 297       */
 298      public function edit_save_data_preprocess($data, $datarecord) {
 299          return $data;
 300      }
 301  
 302      /**
 303       * Loads a user object with data for this field ready for the edit profile
 304       * form
 305       * @param stdClass $user a user object
 306       */
 307      public function edit_load_user_data($user) {
 308          if ($this->data !== null) {
 309              $user->{$this->inputname} = $this->data;
 310          }
 311      }
 312  
 313      /**
 314       * Check if the field data should be loaded into the user object
 315       * By default it is, but for field types where the data may be potentially
 316       * large, the child class should override this and return false
 317       * @return bool
 318       */
 319      public function is_user_object_data() {
 320          return true;
 321      }
 322  
 323      /**
 324       * Accessor method: set the userid for this instance
 325       * @internal This method should not generally be overwritten by child classes.
 326       * @param integer $userid id from the user table
 327       */
 328      public function set_userid($userid) {
 329          $this->userid = $userid;
 330      }
 331  
 332      /**
 333       * Accessor method: set the fieldid for this instance
 334       * @internal This method should not generally be overwritten by child classes.
 335       * @param integer $fieldid id from the user_info_field table
 336       */
 337      public function set_fieldid($fieldid) {
 338          $this->fieldid = $fieldid;
 339      }
 340  
 341      /**
 342       * Sets the field object and default data and format into $this->data and $this->dataformat
 343       *
 344       * This method should be called before {@link self::set_user_data}
 345       *
 346       * @param stdClass $field
 347       * @throws coding_exception
 348       */
 349      public function set_field($field) {
 350          global $CFG;
 351          if ($CFG->debugdeveloper) {
 352              $properties = ['id', 'shortname', 'name', 'datatype', 'description', 'descriptionformat', 'categoryid', 'sortorder',
 353                  'required', 'locked', 'visible', 'forceunique', 'signup', 'defaultdata', 'defaultdataformat', 'param1', 'param2',
 354                  'param3', 'param4', 'param5'];
 355              foreach ($properties as $property) {
 356                  if (!property_exists($field, $property)) {
 357                      debugging('The \'' . $property . '\' property must be set.', DEBUG_DEVELOPER);
 358                  }
 359              }
 360          }
 361          if ($this->fieldid && $this->fieldid != $field->id) {
 362              throw new coding_exception('Can not set field object after a different field id was set');
 363          }
 364          $this->fieldid = $field->id;
 365          $this->field = $field;
 366          $this->inputname = 'profile_field_' . $this->field->shortname;
 367          $this->data = $this->field->defaultdata;
 368          $this->dataformat = FORMAT_HTML;
 369      }
 370  
 371      /**
 372       * Sets user id and user data for the field
 373       *
 374       * @param mixed $data
 375       * @param int $dataformat
 376       */
 377      public function set_user_data($data, $dataformat) {
 378          $this->data = $data;
 379          $this->dataformat = $dataformat;
 380      }
 381  
 382      /**
 383       * Set the name for the profile category where this field is
 384       *
 385       * @param string $categoryname
 386       */
 387      public function set_category_name($categoryname) {
 388          $this->categoryname = $categoryname;
 389      }
 390  
 391      /**
 392       * Return field short name
 393       *
 394       * @return string
 395       */
 396      public function get_shortname(): string {
 397          return $this->field->shortname;
 398      }
 399  
 400      /**
 401       * Returns the name of the profile category where this field is
 402       *
 403       * @return string
 404       */
 405      public function get_category_name() {
 406          global $DB;
 407          if ($this->categoryname === null) {
 408              $this->categoryname = $DB->get_field('user_info_category', 'name', ['id' => $this->field->categoryid]);
 409          }
 410          return $this->categoryname;
 411      }
 412  
 413      /**
 414       * Accessor method: Load the field record and user data associated with the
 415       * object's fieldid and userid
 416       *
 417       * @internal This method should not generally be overwritten by child classes.
 418       */
 419      public function load_data() {
 420          global $DB;
 421  
 422          // Load the field object.
 423          if (($this->fieldid == 0) or (!($field = $DB->get_record('user_info_field', array('id' => $this->fieldid))))) {
 424              $this->field = null;
 425              $this->inputname = '';
 426          } else {
 427              $this->set_field($field);
 428          }
 429  
 430          if (!empty($this->field) && $this->userid > 0) {
 431              $params = array('userid' => $this->userid, 'fieldid' => $this->fieldid);
 432              if ($data = $DB->get_record('user_info_data', $params, 'data, dataformat')) {
 433                  $this->set_user_data($data->data, $data->dataformat);
 434              }
 435          } else {
 436              $this->data = null;
 437          }
 438      }
 439  
 440      /**
 441       * Check if the field data is visible to the current user
 442       * @internal This method should not generally be overwritten by child classes.
 443       * @return bool
 444       */
 445      public function is_visible() {
 446          global $USER, $COURSE;
 447  
 448          $context = ($this->userid > 0) ? context_user::instance($this->userid) : context_system::instance();
 449  
 450          switch ($this->field->visible) {
 451              case PROFILE_VISIBLE_TEACHERS:
 452                  if ($this->is_signup_field() && (empty($this->userid) || isguestuser($this->userid))) {
 453                      return true;
 454                  } else if ($this->userid == $USER->id) {
 455                      return true;
 456                  } else {
 457                      $coursecontext = context_course::instance($COURSE->id);
 458                      return has_capability('moodle/site:viewuseridentity', $coursecontext);
 459                  }
 460              case PROFILE_VISIBLE_ALL:
 461                  return true;
 462              case PROFILE_VISIBLE_PRIVATE:
 463                  if ($this->is_signup_field() && (empty($this->userid) || isguestuser($this->userid))) {
 464                      return true;
 465                  } else if ($this->userid == $USER->id) {
 466                      return true;
 467                  } else {
 468                      return has_capability('moodle/user:viewalldetails', $context);
 469                  }
 470              default:
 471                  return has_capability('moodle/user:viewalldetails', $context);
 472          }
 473      }
 474  
 475      /**
 476       * Check if the field data is editable for the current user
 477       * This method should not generally be overwritten by child classes.
 478       * @return bool
 479       */
 480      public function is_editable() {
 481          global $USER;
 482  
 483          if (!$this->is_visible()) {
 484              return false;
 485          }
 486  
 487          if ($this->is_signup_field() && (empty($this->userid) || isguestuser($this->userid))) {
 488              // Allow editing the field on the signup page.
 489              return true;
 490          }
 491  
 492          $systemcontext = context_system::instance();
 493  
 494          if ($this->userid == $USER->id && has_capability('moodle/user:editownprofile', $systemcontext)) {
 495              return true;
 496          }
 497  
 498          if (has_capability('moodle/user:update', $systemcontext)) {
 499              return true;
 500          }
 501  
 502          return false;
 503      }
 504  
 505      /**
 506       * Check if the field data is considered empty
 507       * @internal This method should not generally be overwritten by child classes.
 508       * @return boolean
 509       */
 510      public function is_empty() {
 511          return ( ($this->data != '0') and empty($this->data));
 512      }
 513  
 514      /**
 515       * Check if the field is required on the edit profile page
 516       * @internal This method should not generally be overwritten by child classes.
 517       * @return bool
 518       */
 519      public function is_required() {
 520          return (boolean)$this->field->required;
 521      }
 522  
 523      /**
 524       * Check if the field is locked on the edit profile page
 525       * @internal This method should not generally be overwritten by child classes.
 526       * @return bool
 527       */
 528      public function is_locked() {
 529          return (boolean)$this->field->locked;
 530      }
 531  
 532      /**
 533       * Check if the field data should be unique
 534       * @internal This method should not generally be overwritten by child classes.
 535       * @return bool
 536       */
 537      public function is_unique() {
 538          return (boolean)$this->field->forceunique;
 539      }
 540  
 541      /**
 542       * Check if the field should appear on the signup page
 543       * @internal This method should not generally be overwritten by child classes.
 544       * @return bool
 545       */
 546      public function is_signup_field() {
 547          return (boolean)$this->field->signup;
 548      }
 549  
 550      /**
 551       * Return the field settings suitable to be exported via an external function.
 552       * By default it return all the field settings.
 553       *
 554       * @return array all the settings
 555       * @since Moodle 3.2
 556       */
 557      public function get_field_config_for_external() {
 558          return (array) $this->field;
 559      }
 560  
 561      /**
 562       * Return the field type and null properties.
 563       * This will be used for validating the data submitted by a user.
 564       *
 565       * @return array the param type and null property
 566       * @since Moodle 3.2
 567       */
 568      public function get_field_properties() {
 569          return array(PARAM_RAW, NULL_NOT_ALLOWED);
 570      }
 571  }
 572  
 573  /**
 574   * Returns an array of all custom field records with any defined data (or empty data), for the specified user id.
 575   * @param int $userid
 576   * @return profile_field_base[]
 577   */
 578  function profile_get_user_fields_with_data(int $userid): array {
 579      global $DB, $CFG;
 580  
 581      // Join any user info data present with each user info field for the user object.
 582      $sql = 'SELECT uif.*, uic.name AS categoryname ';
 583      if ($userid > 0) {
 584          $sql .= ', uind.id AS hasuserdata, uind.data, uind.dataformat ';
 585      }
 586      $sql .= 'FROM {user_info_field} uif ';
 587      $sql .= 'LEFT JOIN {user_info_category} uic ON uif.categoryid = uic.id ';
 588      if ($userid > 0) {
 589          $sql .= 'LEFT JOIN {user_info_data} uind ON uif.id = uind.fieldid AND uind.userid = :userid ';
 590      }
 591      $sql .= 'ORDER BY uic.sortorder ASC, uif.sortorder ASC ';
 592      $fields = $DB->get_records_sql($sql, ['userid' => $userid]);
 593      $data = [];
 594      foreach ($fields as $field) {
 595          require_once($CFG->dirroot . '/user/profile/field/' . $field->datatype . '/field.class.php');
 596          $classname = 'profile_field_' . $field->datatype;
 597          $field->hasuserdata = !empty($field->hasuserdata);
 598          /** @var profile_field_base $fieldobject */
 599          $fieldobject = new $classname($field->id, $userid, $field);
 600          $fieldobject->set_category_name($field->categoryname);
 601          unset($field->categoryname);
 602          $data[] = $fieldobject;
 603      }
 604      return $data;
 605  }
 606  
 607  /**
 608   * Returns an array of all custom field records with any defined data (or empty data), for the specified user id, by category.
 609   * @param int $userid
 610   * @return profile_field_base[][]
 611   */
 612  function profile_get_user_fields_with_data_by_category(int $userid): array {
 613      $fields = profile_get_user_fields_with_data($userid);
 614      $data = [];
 615      foreach ($fields as $field) {
 616          $data[$field->field->categoryid][] = $field;
 617      }
 618      return $data;
 619  }
 620  
 621  /**
 622   * Loads user profile field data into the user object.
 623   * @param stdClass $user
 624   */
 625  function profile_load_data(stdClass $user): void {
 626      $fields = profile_get_user_fields_with_data($user->id);
 627      foreach ($fields as $formfield) {
 628          $formfield->edit_load_user_data($user);
 629      }
 630  }
 631  
 632  /**
 633   * Print out the customisable categories and fields for a users profile
 634   *
 635   * @param MoodleQuickForm $mform instance of the moodleform class
 636   * @param int $userid id of user whose profile is being edited or 0 for the new user
 637   */
 638  function profile_definition(MoodleQuickForm $mform, int $userid = 0): void {
 639      $categories = profile_get_user_fields_with_data_by_category($userid);
 640      foreach ($categories as $categoryid => $fields) {
 641          // Check first if *any* fields will be displayed.
 642          $fieldstodisplay = [];
 643  
 644          foreach ($fields as $formfield) {
 645              if ($formfield->is_editable()) {
 646                  $fieldstodisplay[] = $formfield;
 647              }
 648          }
 649  
 650          if (empty($fieldstodisplay)) {
 651              continue;
 652          }
 653  
 654          // Display the header and the fields.
 655          $mform->addElement('header', 'category_'.$categoryid, format_string($fields[0]->get_category_name()));
 656          foreach ($fieldstodisplay as $formfield) {
 657              $formfield->edit_field($mform);
 658          }
 659      }
 660  }
 661  
 662  /**
 663   * Adds profile fields to user edit forms.
 664   * @param MoodleQuickForm $mform
 665   * @param int $userid
 666   */
 667  function profile_definition_after_data(MoodleQuickForm $mform, int $userid): void {
 668      $userid = ($userid < 0) ? 0 : (int)$userid;
 669  
 670      $fields = profile_get_user_fields_with_data($userid);
 671      foreach ($fields as $formfield) {
 672          $formfield->edit_after_data($mform);
 673      }
 674  }
 675  
 676  /**
 677   * Validates profile data.
 678   * @param stdClass $usernew
 679   * @param array $files
 680   * @return array array of errors, same as in {@see moodleform::validation()}
 681   */
 682  function profile_validation(stdClass $usernew, array $files): array {
 683      $err = array();
 684      $fields = profile_get_user_fields_with_data($usernew->id);
 685      foreach ($fields as $formfield) {
 686          $err += $formfield->edit_validate_field($usernew, $files);
 687      }
 688      return $err;
 689  }
 690  
 691  /**
 692   * Saves profile data for a user.
 693   * @param stdClass $usernew
 694   */
 695  function profile_save_data(stdClass $usernew): void {
 696      global $CFG;
 697  
 698      $fields = profile_get_user_fields_with_data($usernew->id);
 699      foreach ($fields as $formfield) {
 700          $formfield->edit_save_data($usernew);
 701      }
 702  }
 703  
 704  /**
 705   * Display profile fields.
 706   *
 707   * @deprecated since Moodle 3.11 MDL-71051 - please do not use this function any more.
 708   * @todo MDL-71413 This will be deleted in Moodle 4.3.
 709   *
 710   * @param int $userid
 711   */
 712  function profile_display_fields($userid) {
 713      debugging('Function profile_display_fields() is deprecated because it is no longer used and will be '.
 714          'removed in future versions of Moodle', DEBUG_DEVELOPER);
 715  
 716      $categories = profile_get_user_fields_with_data_by_category($userid);
 717      foreach ($categories as $categoryid => $fields) {
 718          foreach ($fields as $formfield) {
 719              if ($formfield->is_visible() and !$formfield->is_empty()) {
 720                  echo html_writer::tag('dt', format_string($formfield->field->name));
 721                  echo html_writer::tag('dd', $formfield->display_data());
 722              }
 723          }
 724      }
 725  }
 726  
 727  /**
 728   * Retrieves a list of profile fields that must be displayed in the sign-up form.
 729   *
 730   * @return array list of profile fields info
 731   * @since Moodle 3.2
 732   */
 733  function profile_get_signup_fields(): array {
 734      $profilefields = array();
 735      $fieldobjects = profile_get_user_fields_with_data(0);
 736      foreach ($fieldobjects as $fieldobject) {
 737          $field = (object)$fieldobject->get_field_config_for_external();
 738          if ($fieldobject->get_category_name() !== null && $fieldobject->is_signup_field() && $field->visible <> 0) {
 739              $profilefields[] = (object) array(
 740                  'categoryid' => $field->categoryid,
 741                  'categoryname' => $fieldobject->get_category_name(),
 742                  'fieldid' => $field->id,
 743                  'datatype' => $field->datatype,
 744                  'object' => $fieldobject
 745              );
 746          }
 747      }
 748      return $profilefields;
 749  }
 750  
 751  /**
 752   * Adds code snippet to a moodle form object for custom profile fields that
 753   * should appear on the signup page
 754   * @param MoodleQuickForm $mform moodle form object
 755   */
 756  function profile_signup_fields(MoodleQuickForm $mform): void {
 757  
 758      if ($fields = profile_get_signup_fields()) {
 759          foreach ($fields as $field) {
 760              // Check if we change the categories.
 761              if (!isset($currentcat) || $currentcat != $field->categoryid) {
 762                   $currentcat = $field->categoryid;
 763                   $mform->addElement('header', 'category_'.$field->categoryid, format_string($field->categoryname));
 764              };
 765              $field->object->edit_field($mform);
 766          }
 767      }
 768  }
 769  
 770  /**
 771   * Returns an object with the custom profile fields set for the given user
 772   * @param int $userid
 773   * @param bool $onlyinuserobject True if you only want the ones in $USER.
 774   * @return stdClass object where properties names are shortnames of custom profile fields
 775   */
 776  function profile_user_record(int $userid, bool $onlyinuserobject = true): stdClass {
 777      $usercustomfields = new stdClass();
 778  
 779      $fields = profile_get_user_fields_with_data($userid);
 780      foreach ($fields as $formfield) {
 781          if (!$onlyinuserobject || $formfield->is_user_object_data()) {
 782              $usercustomfields->{$formfield->field->shortname} = $formfield->data;
 783          }
 784      }
 785  
 786      return $usercustomfields;
 787  }
 788  
 789  /**
 790   * Obtains a list of all available custom profile fields, indexed by id.
 791   *
 792   * Some profile fields are not included in the user object data (see
 793   * profile_user_record function above). Optionally, you can obtain only those
 794   * fields that are included in the user object.
 795   *
 796   * To be clear, this function returns the available fields, and does not
 797   * return the field values for a particular user.
 798   *
 799   * @param bool $onlyinuserobject True if you only want the ones in $USER
 800   * @return array Array of field objects from database (indexed by id)
 801   * @since Moodle 2.7.1
 802   */
 803  function profile_get_custom_fields(bool $onlyinuserobject = false): array {
 804      $fieldobjects = profile_get_user_fields_with_data(0);
 805      $fields = [];
 806      foreach ($fieldobjects as $fieldobject) {
 807          if (!$onlyinuserobject || $fieldobject->is_user_object_data()) {
 808              $fields[$fieldobject->fieldid] = (object)$fieldobject->get_field_config_for_external();
 809          }
 810      }
 811      ksort($fields);
 812      return $fields;
 813  }
 814  
 815  /**
 816   * Load custom profile fields into user object
 817   *
 818   * @param stdClass $user user object
 819   */
 820  function profile_load_custom_fields($user) {
 821      $user->profile = (array)profile_user_record($user->id);
 822  }
 823  
 824  /**
 825   * Save custom profile fields for a user.
 826   *
 827   * @param int $userid The user id
 828   * @param array $profilefields The fields to save
 829   */
 830  function profile_save_custom_fields($userid, $profilefields) {
 831      global $DB;
 832  
 833      $fields = profile_get_user_fields_with_data(0);
 834      if ($fields) {
 835          foreach ($fields as $fieldobject) {
 836              $field = (object)$fieldobject->get_field_config_for_external();
 837              if (isset($profilefields[$field->shortname])) {
 838                  $conditions = array('fieldid' => $field->id, 'userid' => $userid);
 839                  $id = $DB->get_field('user_info_data', 'id', $conditions);
 840                  $data = $profilefields[$field->shortname];
 841                  if ($id) {
 842                      $DB->set_field('user_info_data', 'data', $data, array('id' => $id));
 843                  } else {
 844                      $record = array('fieldid' => $field->id, 'userid' => $userid, 'data' => $data);
 845                      $DB->insert_record('user_info_data', $record);
 846                  }
 847              }
 848          }
 849      }
 850  }
 851  
 852  /**
 853   * Gets basic data about custom profile fields. This is minimal data that is cached within the
 854   * current request for all fields so that it can be used quickly.
 855   *
 856   * @param string $shortname Shortname of custom profile field
 857   * @param bool $casesensitive Whether to perform case-sensitive matching of shortname. Note current limitations of custom profile
 858   *  fields allow the same shortname to exist differing only by it's case
 859   * @return stdClass|null Object with properties id, shortname, name, visible, datatype, categoryid, etc
 860   */
 861  function profile_get_custom_field_data_by_shortname(string $shortname, bool $casesensitive = true): ?stdClass {
 862      $cache = \cache::make_from_params(cache_store::MODE_REQUEST, 'core_profile', 'customfields',
 863              [], ['simplekeys' => true, 'simpledata' => true]);
 864      $data = $cache->get($shortname);
 865      if ($data === false) {
 866          // If we don't have data, we get and cache it for all fields to avoid multiple DB requests.
 867          $fields = profile_get_custom_fields();
 868          $data = null;
 869          foreach ($fields as $field) {
 870              $cache->set($field->shortname, $field);
 871  
 872              // Perform comparison according to case sensitivity parameter.
 873              $shortnamematch = $casesensitive
 874                  ? strcmp($field->shortname, $shortname) === 0
 875                  : strcasecmp($field->shortname, $shortname) === 0;
 876  
 877              if ($shortnamematch) {
 878                  $data = $field;
 879              }
 880          }
 881      }
 882  
 883      return $data;
 884  }
 885  
 886  /**
 887   * Trigger a user profile viewed event.
 888   *
 889   * @param stdClass  $user user  object
 890   * @param stdClass  $context  context object (course or user)
 891   * @param stdClass  $course course  object
 892   * @since Moodle 2.9
 893   */
 894  function profile_view($user, $context, $course = null) {
 895  
 896      $eventdata = array(
 897          'objectid' => $user->id,
 898          'relateduserid' => $user->id,
 899          'context' => $context
 900      );
 901  
 902      if (!empty($course)) {
 903          $eventdata['courseid'] = $course->id;
 904          $eventdata['other'] = array(
 905              'courseid' => $course->id,
 906              'courseshortname' => $course->shortname,
 907              'coursefullname' => $course->fullname
 908          );
 909      }
 910  
 911      $event = \core\event\user_profile_viewed::create($eventdata);
 912      $event->add_record_snapshot('user', $user);
 913      $event->trigger();
 914  }
 915  
 916  /**
 917   * Does the user have all required custom fields set?
 918   *
 919   * Internal, to be exclusively used by {@link user_not_fully_set_up()} only.
 920   *
 921   * Note that if users have no way to fill a required field via editing their
 922   * profiles (e.g. the field is not visible or it is locked), we still return true.
 923   * So this is actually checking if we should redirect the user to edit their
 924   * profile, rather than whether there is a value in the database.
 925   *
 926   * @param int $userid
 927   * @return bool
 928   */
 929  function profile_has_required_custom_fields_set($userid) {
 930      $profilefields = profile_get_user_fields_with_data($userid);
 931      foreach ($profilefields as $profilefield) {
 932          if ($profilefield->is_required() && !$profilefield->is_locked() &&
 933              $profilefield->is_empty() && $profilefield->get_field_config_for_external()['visible']) {
 934              return false;
 935          }
 936      }
 937  
 938      return true;
 939  }