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Developer Documentation
- Bug fixes for general core bugs in 3.10.x will end 8 November 2021 (12 months).
- Bug fixes for security issues in 3.10.x will end 9 May 2022 (18 months).
- PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
/lib/ -> grouplib.php (source)
Differences Between: [Versions 310 and 311] [Versions 310 and 400] [Versions 310 and 401] [Versions 310 and 402] [Versions 310 and 403]
1 <?php 2 3 // This file is part of Moodle - http://moodle.org/ 4 // 5 // Moodle is free software: you can redistribute it and/or modify 6 // it under the terms of the GNU General Public License as published by 7 // the Free Software Foundation, either version 3 of the License, or 8 // (at your option) any later version. 9 // 10 // Moodle is distributed in the hope that it will be useful, 11 // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 // GNU General Public License for more details. 14 // 15 // You should have received a copy of the GNU General Public License 16 // along with Moodle. If not, see <http://www.gnu.org/licenses/>. 17 18 /** 19 * @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com} 20 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 21 * @package core_group 22 */ 23 24 defined('MOODLE_INTERNAL') || die(); 25 26 /** 27 * Groups not used in course or activity 28 */ 29 define('NOGROUPS', 0); 30 31 /** 32 * Groups used, users do not see other groups 33 */ 34 define('SEPARATEGROUPS', 1); 35 36 /** 37 * Groups used, students see other groups 38 */ 39 define('VISIBLEGROUPS', 2); 40 41 /** 42 * This is for filtering users without any group. 43 */ 44 define('USERSWITHOUTGROUP', -1); 45 46 /** 47 * 'None' join type, used when filtering by groups (logical NOT) 48 */ 49 define('GROUPS_JOIN_NONE', 0); 50 51 /** 52 * 'Any' join type, used when filtering by groups (logical OR) 53 */ 54 define('GROUPS_JOIN_ANY', 1); 55 56 /** 57 * 'All' join type, used when filtering by groups (logical AND) 58 */ 59 define('GROUPS_JOIN_ALL', 2); 60 61 /** 62 * Determines if a group with a given groupid exists. 63 * 64 * @category group 65 * @param int $groupid The groupid to check for 66 * @return bool True if the group exists, false otherwise or if an error 67 * occurred. 68 */ 69 function groups_group_exists($groupid) { 70 global $DB; 71 return $DB->record_exists('groups', array('id'=>$groupid)); 72 } 73 74 /** 75 * Gets the name of a group with a specified id 76 * 77 * @category group 78 * @param int $groupid The id of the group 79 * @return string The name of the group 80 */ 81 function groups_get_group_name($groupid) { 82 global $DB; 83 return $DB->get_field('groups', 'name', array('id'=>$groupid)); 84 } 85 86 /** 87 * Gets the name of a grouping with a specified id 88 * 89 * @category group 90 * @param int $groupingid The id of the grouping 91 * @return string The name of the grouping 92 */ 93 function groups_get_grouping_name($groupingid) { 94 global $DB; 95 return $DB->get_field('groupings', 'name', array('id'=>$groupingid)); 96 } 97 98 /** 99 * Returns the groupid of a group with the name specified for the course. 100 * Group names should be unique in course 101 * 102 * @category group 103 * @param int $courseid The id of the course 104 * @param string $name name of group (without magic quotes) 105 * @return int $groupid 106 */ 107 function groups_get_group_by_name($courseid, $name) { 108 $data = groups_get_course_data($courseid); 109 foreach ($data->groups as $group) { 110 if ($group->name == $name) { 111 return $group->id; 112 } 113 } 114 return false; 115 } 116 117 /** 118 * Returns the groupid of a group with the idnumber specified for the course. 119 * Group idnumbers should be unique within course 120 * 121 * @category group 122 * @param int $courseid The id of the course 123 * @param string $idnumber idnumber of group 124 * @return group object 125 */ 126 function groups_get_group_by_idnumber($courseid, $idnumber) { 127 if (empty($idnumber)) { 128 return false; 129 } 130 $data = groups_get_course_data($courseid); 131 foreach ($data->groups as $group) { 132 if ($group->idnumber == $idnumber) { 133 return $group; 134 } 135 } 136 return false; 137 } 138 139 /** 140 * Returns the groupingid of a grouping with the name specified for the course. 141 * Grouping names should be unique in course 142 * 143 * @category group 144 * @param int $courseid The id of the course 145 * @param string $name name of group (without magic quotes) 146 * @return int $groupid 147 */ 148 function groups_get_grouping_by_name($courseid, $name) { 149 $data = groups_get_course_data($courseid); 150 foreach ($data->groupings as $grouping) { 151 if ($grouping->name == $name) { 152 return $grouping->id; 153 } 154 } 155 return false; 156 } 157 158 /** 159 * Returns the groupingid of a grouping with the idnumber specified for the course. 160 * Grouping names should be unique within course 161 * 162 * @category group 163 * @param int $courseid The id of the course 164 * @param string $idnumber idnumber of the group 165 * @return grouping object 166 */ 167 function groups_get_grouping_by_idnumber($courseid, $idnumber) { 168 if (empty($idnumber)) { 169 return false; 170 } 171 $data = groups_get_course_data($courseid); 172 foreach ($data->groupings as $grouping) { 173 if ($grouping->idnumber == $idnumber) { 174 return $grouping; 175 } 176 } 177 return false; 178 } 179 180 /** 181 * Get the group object 182 * 183 * @category group 184 * @param int $groupid ID of the group. 185 * @param string $fields (default is all fields) 186 * @param int $strictness (IGNORE_MISSING - default) 187 * @return bool|stdClass group object or false if not found 188 * @throws dml_exception 189 */ 190 function groups_get_group($groupid, $fields='*', $strictness=IGNORE_MISSING) { 191 global $DB; 192 return $DB->get_record('groups', array('id'=>$groupid), $fields, $strictness); 193 } 194 195 /** 196 * Get the grouping object 197 * 198 * @category group 199 * @param int $groupingid ID of the group. 200 * @param string $fields 201 * @param int $strictness (IGNORE_MISSING - default) 202 * @return stdClass group object 203 */ 204 function groups_get_grouping($groupingid, $fields='*', $strictness=IGNORE_MISSING) { 205 global $DB; 206 return $DB->get_record('groupings', array('id'=>$groupingid), $fields, $strictness); 207 } 208 209 /** 210 * Gets array of all groups in a specified course (subject to the conditions imposed by the other arguments). 211 * 212 * @category group 213 * @param int $courseid The id of the course. 214 * @param int|int[] $userid optional user id or array of ids, returns only groups continaing one or more of those users. 215 * @param int $groupingid optional returns only groups in the specified grouping. 216 * @param string $fields defaults to g.*. This allows you to vary which fields are returned. 217 * If $groupingid is specified, the groupings_groups table will be available with alias gg. 218 * If $userid is specified, the groups_members table will be available as gm. 219 * @param bool $withmembers if true return an extra field members (int[]) which is the list of userids that 220 * are members of each group. For this to work, g.id (or g.*) must be included in $fields. 221 * In this case, the final results will always be an array indexed by group id. 222 * @return array returns an array of the group objects (unless you have done something very weird 223 * with the $fields option). 224 */ 225 function groups_get_all_groups($courseid, $userid=0, $groupingid=0, $fields='g.*', $withmembers=false) { 226 global $DB; 227 228 // We need to check that we each field in the fields list belongs to the group table and that it has not being 229 // aliased. If its something else we need to avoid the cache and run the query as who knows whats going on. 230 $knownfields = true; 231 if ($fields !== 'g.*') { 232 // Quickly check if the first field is no longer g.id as using the 233 // cache will return an array indexed differently than when expect 234 if (strpos($fields, 'g.*') !== 0 && strpos($fields, 'g.id') !== 0) { 235 $knownfields = false; 236 } else { 237 $fieldbits = explode(',', $fields); 238 foreach ($fieldbits as $bit) { 239 $bit = trim($bit); 240 if (strpos($bit, 'g.') !== 0 or stripos($bit, ' AS ') !== false) { 241 $knownfields = false; 242 break; 243 } 244 } 245 } 246 } 247 248 if (empty($userid) && $knownfields && !$withmembers) { 249 // We can use the cache. 250 $data = groups_get_course_data($courseid); 251 if (empty($groupingid)) { 252 // All groups.. Easy! 253 $groups = $data->groups; 254 } else { 255 $groups = array(); 256 foreach ($data->mappings as $mapping) { 257 if ($mapping->groupingid != $groupingid) { 258 continue; 259 } 260 if (isset($data->groups[$mapping->groupid])) { 261 $groups[$mapping->groupid] = $data->groups[$mapping->groupid]; 262 } 263 } 264 } 265 // Yay! We could use the cache. One more query saved. 266 return $groups; 267 } 268 269 $params = []; 270 $userfrom = ''; 271 $userwhere = ''; 272 if (!empty($userid)) { 273 list($usql, $params) = $DB->get_in_or_equal($userid); 274 $userfrom = "JOIN {groups_members} gm ON gm.groupid = g.id"; 275 $userwhere = "AND gm.userid $usql"; 276 } 277 278 $groupingfrom = ''; 279 $groupingwhere = ''; 280 if (!empty($groupingid)) { 281 $groupingfrom = "JOIN {groupings_groups} gg ON gg.groupid = g.id"; 282 $groupingwhere = "AND gg.groupingid = ?"; 283 $params[] = $groupingid; 284 } 285 286 array_unshift($params, $courseid); 287 288 $results = $DB->get_records_sql(" 289 SELECT $fields 290 FROM {groups} g 291 $userfrom 292 $groupingfrom 293 WHERE g.courseid = ? 294 $userwhere 295 $groupingwhere 296 ORDER BY g.name ASC", $params); 297 298 if (!$withmembers) { 299 return $results; 300 } 301 302 // We also want group members. We do this in a separate query, becuse the above 303 // query will return a lot of data (e.g. g.description) for each group, and 304 // some groups may contain hundreds of members. We don't want the results 305 // to contain hundreds of copies of long descriptions. 306 $groups = []; 307 foreach ($results as $row) { 308 $groups[$row->id] = $row; 309 $groups[$row->id]->members = []; 310 } 311 $groupmembers = $DB->get_records_list('groups_members', 'groupid', array_keys($groups)); 312 foreach ($groupmembers as $gm) { 313 $groups[$gm->groupid]->members[$gm->userid] = $gm->userid; 314 } 315 return $groups; 316 } 317 318 /** 319 * Gets array of all groups in current user. 320 * 321 * @since Moodle 2.5 322 * @category group 323 * @return array Returns an array of the group objects. 324 */ 325 function groups_get_my_groups() { 326 global $DB, $USER; 327 return $DB->get_records_sql("SELECT * 328 FROM {groups_members} gm 329 JOIN {groups} g 330 ON g.id = gm.groupid 331 WHERE gm.userid = ? 332 ORDER BY name ASC", array($USER->id)); 333 } 334 335 /** 336 * Returns info about user's groups in course. 337 * 338 * @category group 339 * @param int $courseid 340 * @param int $userid $USER if not specified 341 * @return array Array[groupingid][groupid] including grouping id 0 which means all groups 342 */ 343 function groups_get_user_groups($courseid, $userid=0) { 344 global $USER, $DB; 345 346 if (empty($userid)) { 347 $userid = $USER->id; 348 } 349 350 $cache = cache::make('core', 'user_group_groupings'); 351 352 // Try to retrieve group ids from the cache. 353 $usergroups = $cache->get($userid); 354 355 if ($usergroups === false) { 356 $sql = "SELECT g.id, g.courseid, gg.groupingid 357 FROM {groups} g 358 JOIN {groups_members} gm ON gm.groupid = g.id 359 LEFT JOIN {groupings_groups} gg ON gg.groupid = g.id 360 WHERE gm.userid = ?"; 361 362 $rs = $DB->get_recordset_sql($sql, array($userid)); 363 364 $usergroups = array(); 365 $allgroups = array(); 366 367 foreach ($rs as $group) { 368 if (!array_key_exists($group->courseid, $allgroups)) { 369 $allgroups[$group->courseid] = array(); 370 } 371 $allgroups[$group->courseid][$group->id] = $group->id; 372 if (!array_key_exists($group->courseid, $usergroups)) { 373 $usergroups[$group->courseid] = array(); 374 } 375 if (is_null($group->groupingid)) { 376 continue; 377 } 378 if (!array_key_exists($group->groupingid, $usergroups[$group->courseid])) { 379 $usergroups[$group->courseid][$group->groupingid] = array(); 380 } 381 $usergroups[$group->courseid][$group->groupingid][$group->id] = $group->id; 382 } 383 $rs->close(); 384 385 foreach (array_keys($allgroups) as $cid) { 386 $usergroups[$cid]['0'] = array_keys($allgroups[$cid]); // All user groups in the course. 387 } 388 389 // Cache the data. 390 $cache->set($userid, $usergroups); 391 } 392 393 if (array_key_exists($courseid, $usergroups)) { 394 return $usergroups[$courseid]; 395 } else { 396 return array('0' => array()); 397 } 398 } 399 400 /** 401 * Gets an array of all groupings in a specified course. This value is cached 402 * for a single course (so you can call it repeatedly for the same course 403 * without a performance penalty). 404 * 405 * @category group 406 * @param int $courseid return all groupings from course with this courseid 407 * @return array Returns an array of the grouping objects (empty if none) 408 */ 409 function groups_get_all_groupings($courseid) { 410 $data = groups_get_course_data($courseid); 411 return $data->groupings; 412 } 413 414 /** 415 * Determines if the user is a member of the given group. 416 * 417 * If $userid is null, use the global object. 418 * 419 * @category group 420 * @param int $groupid The group to check for membership. 421 * @param int $userid The user to check against the group. 422 * @return bool True if the user is a member, false otherwise. 423 */ 424 function groups_is_member($groupid, $userid=null) { 425 global $USER, $DB; 426 427 if (!$userid) { 428 $userid = $USER->id; 429 } 430 431 return $DB->record_exists('groups_members', array('groupid'=>$groupid, 'userid'=>$userid)); 432 } 433 434 /** 435 * Determines if current or specified is member of any active group in activity 436 * 437 * @category group 438 * @staticvar array $cache 439 * @param stdClass|cm_info $cm course module object 440 * @param int $userid id of user, null means $USER->id 441 * @return bool true if user member of at least one group used in activity 442 */ 443 function groups_has_membership($cm, $userid=null) { 444 global $CFG, $USER, $DB; 445 446 static $cache = array(); 447 448 if (empty($userid)) { 449 $userid = $USER->id; 450 } 451 452 $cachekey = $userid.'|'.$cm->course.'|'.$cm->groupingid; 453 if (isset($cache[$cachekey])) { 454 return($cache[$cachekey]); 455 } 456 457 if ($cm->groupingid) { 458 // find out if member of any group in selected activity grouping 459 $sql = "SELECT 'x' 460 FROM {groups_members} gm, {groupings_groups} gg 461 WHERE gm.userid = ? AND gm.groupid = gg.groupid AND gg.groupingid = ?"; 462 $params = array($userid, $cm->groupingid); 463 464 } else { 465 // no grouping used - check all groups in course 466 $sql = "SELECT 'x' 467 FROM {groups_members} gm, {groups} g 468 WHERE gm.userid = ? AND gm.groupid = g.id AND g.courseid = ?"; 469 $params = array($userid, $cm->course); 470 } 471 472 $cache[$cachekey] = $DB->record_exists_sql($sql, $params); 473 474 return $cache[$cachekey]; 475 } 476 477 /** 478 * Returns the users in the specified group. 479 * 480 * @category group 481 * @param int $groupid The groupid to get the users for 482 * @param int $fields The fields to return 483 * @param int $sort optional sorting of returned users 484 * @return array|bool Returns an array of the users for the specified 485 * group or false if no users or an error returned. 486 */ 487 function groups_get_members($groupid, $fields='u.*', $sort='lastname ASC') { 488 global $DB; 489 490 return $DB->get_records_sql("SELECT $fields 491 FROM {user} u, {groups_members} gm 492 WHERE u.id = gm.userid AND gm.groupid = ? 493 ORDER BY $sort", array($groupid)); 494 } 495 496 497 /** 498 * Returns the users in the specified grouping. 499 * 500 * @category group 501 * @param int $groupingid The groupingid to get the users for 502 * @param string $fields The fields to return 503 * @param string $sort optional sorting of returned users 504 * @return array|bool Returns an array of the users for the specified 505 * group or false if no users or an error returned. 506 */ 507 function groups_get_grouping_members($groupingid, $fields='u.*', $sort='lastname ASC') { 508 global $DB; 509 510 return $DB->get_records_sql("SELECT $fields 511 FROM {user} u 512 INNER JOIN {groups_members} gm ON u.id = gm.userid 513 INNER JOIN {groupings_groups} gg ON gm.groupid = gg.groupid 514 WHERE gg.groupingid = ? 515 ORDER BY $sort", array($groupingid)); 516 } 517 518 /** 519 * Returns effective groupmode used in course 520 * 521 * @category group 522 * @param stdClass $course course object. 523 * @return int group mode 524 */ 525 function groups_get_course_groupmode($course) { 526 return $course->groupmode; 527 } 528 529 /** 530 * Returns effective groupmode used in activity, course setting 531 * overrides activity setting if groupmodeforce enabled. 532 * 533 * If $cm is an instance of cm_info it is easier to use $cm->effectivegroupmode 534 * 535 * @category group 536 * @param cm_info|stdClass $cm the course module object. Only the ->course and ->groupmode need to be set. 537 * @param stdClass $course object optional course object to improve perf 538 * @return int group mode 539 */ 540 function groups_get_activity_groupmode($cm, $course=null) { 541 if ($cm instanceof cm_info) { 542 return $cm->effectivegroupmode; 543 } 544 if (isset($course->id) and $course->id == $cm->course) { 545 //ok 546 } else { 547 // Get course object (reuse $COURSE if possible). 548 $course = get_course($cm->course, false); 549 } 550 551 return empty($course->groupmodeforce) ? $cm->groupmode : $course->groupmode; 552 } 553 554 /** 555 * Print group menu selector for course level. 556 * 557 * @category group 558 * @param stdClass $course course object 559 * @param mixed $urlroot return address. Accepts either a string or a moodle_url 560 * @param bool $return return as string instead of printing 561 * @return mixed void or string depending on $return param 562 */ 563 function groups_print_course_menu($course, $urlroot, $return=false) { 564 global $USER, $OUTPUT; 565 566 if (!$groupmode = $course->groupmode) { 567 if ($return) { 568 return ''; 569 } else { 570 return; 571 } 572 } 573 574 $context = context_course::instance($course->id); 575 $aag = has_capability('moodle/site:accessallgroups', $context); 576 577 $usergroups = array(); 578 if ($groupmode == VISIBLEGROUPS or $aag) { 579 $allowedgroups = groups_get_all_groups($course->id, 0, $course->defaultgroupingid); 580 // Get user's own groups and put to the top. 581 $usergroups = groups_get_all_groups($course->id, $USER->id, $course->defaultgroupingid); 582 } else { 583 $allowedgroups = groups_get_all_groups($course->id, $USER->id, $course->defaultgroupingid); 584 } 585 586 $activegroup = groups_get_course_group($course, true, $allowedgroups); 587 588 $groupsmenu = array(); 589 if (!$allowedgroups or $groupmode == VISIBLEGROUPS or $aag) { 590 $groupsmenu[0] = get_string('allparticipants'); 591 } 592 593 $groupsmenu += groups_sort_menu_options($allowedgroups, $usergroups); 594 595 if ($groupmode == VISIBLEGROUPS) { 596 $grouplabel = get_string('groupsvisible'); 597 } else { 598 $grouplabel = get_string('groupsseparate'); 599 } 600 601 if ($aag and $course->defaultgroupingid) { 602 if ($grouping = groups_get_grouping($course->defaultgroupingid)) { 603 $grouplabel = $grouplabel . ' (' . format_string($grouping->name) . ')'; 604 } 605 } 606 607 if (count($groupsmenu) == 1) { 608 $groupname = reset($groupsmenu); 609 $output = $grouplabel.': '.$groupname; 610 } else { 611 $select = new single_select(new moodle_url($urlroot), 'group', $groupsmenu, $activegroup, null, 'selectgroup'); 612 $select->label = $grouplabel; 613 $output = $OUTPUT->render($select); 614 } 615 616 $output = '<div class="groupselector">'.$output.'</div>'; 617 618 if ($return) { 619 return $output; 620 } else { 621 echo $output; 622 } 623 } 624 625 /** 626 * Turn an array of groups into an array of menu options. 627 * @param array $groups of group objects. 628 * @return array groupid => formatted group name. 629 */ 630 function groups_list_to_menu($groups) { 631 $groupsmenu = array(); 632 foreach ($groups as $group) { 633 $groupsmenu[$group->id] = format_string($group->name); 634 } 635 return $groupsmenu; 636 } 637 638 /** 639 * Takes user's allowed groups and own groups and formats for use in group selector menu 640 * If user has allowed groups + own groups will add to an optgroup 641 * Own groups are removed from allowed groups 642 * @param array $allowedgroups All groups user is allowed to see 643 * @param array $usergroups Groups user belongs to 644 * @return array 645 */ 646 function groups_sort_menu_options($allowedgroups, $usergroups) { 647 $useroptions = array(); 648 if ($usergroups) { 649 $useroptions = groups_list_to_menu($usergroups); 650 651 // Remove user groups from other groups list. 652 foreach ($usergroups as $group) { 653 unset($allowedgroups[$group->id]); 654 } 655 } 656 657 $allowedoptions = array(); 658 if ($allowedgroups) { 659 $allowedoptions = groups_list_to_menu($allowedgroups); 660 } 661 662 if ($useroptions && $allowedoptions) { 663 return array( 664 1 => array(get_string('mygroups', 'group') => $useroptions), 665 2 => array(get_string('othergroups', 'group') => $allowedoptions) 666 ); 667 } else if ($useroptions) { 668 return $useroptions; 669 } else { 670 return $allowedoptions; 671 } 672 } 673 674 /** 675 * Generates html to print menu selector for course level, listing all groups. 676 * Note: This api does not do any group mode check use groups_print_course_menu() instead if you want proper checks. 677 * 678 * @param stdclass $course course object. 679 * @param string|moodle_url $urlroot return address. Accepts either a string or a moodle_url. 680 * @param bool $update set this to true to update current active group based on the group param. 681 * @param int $activegroup Change group active to this group if $update set to true. 682 * 683 * @return string html or void 684 */ 685 function groups_allgroups_course_menu($course, $urlroot, $update = false, $activegroup = 0) { 686 global $SESSION, $OUTPUT, $USER; 687 688 $groupmode = groups_get_course_groupmode($course); 689 $context = context_course::instance($course->id); 690 $groupsmenu = array(); 691 692 if (has_capability('moodle/site:accessallgroups', $context)) { 693 $groupsmenu[0] = get_string('allparticipants'); 694 $allowedgroups = groups_get_all_groups($course->id, 0, $course->defaultgroupingid); 695 } else { 696 $allowedgroups = groups_get_all_groups($course->id, $USER->id, $course->defaultgroupingid); 697 } 698 699 $groupsmenu += groups_list_to_menu($allowedgroups); 700 701 if ($update) { 702 // Init activegroup array if necessary. 703 if (!isset($SESSION->activegroup)) { 704 $SESSION->activegroup = array(); 705 } 706 if (!isset($SESSION->activegroup[$course->id])) { 707 $SESSION->activegroup[$course->id] = array(SEPARATEGROUPS => array(), VISIBLEGROUPS => array(), 'aag' => array()); 708 } 709 if (empty($groupsmenu[$activegroup])) { 710 $activegroup = key($groupsmenu); // Force set to one of accessible groups. 711 } 712 $SESSION->activegroup[$course->id][$groupmode][$course->defaultgroupingid] = $activegroup; 713 } 714 715 $grouplabel = get_string('groups'); 716 if (count($groupsmenu) == 0) { 717 return ''; 718 } else if (count($groupsmenu) == 1) { 719 $groupname = reset($groupsmenu); 720 $output = $grouplabel.': '.$groupname; 721 } else { 722 $select = new single_select(new moodle_url($urlroot), 'group', $groupsmenu, $activegroup, null, 'selectgroup'); 723 $select->label = $grouplabel; 724 $output = $OUTPUT->render($select); 725 } 726 727 return $output; 728 729 } 730 731 /** 732 * Print group menu selector for activity. 733 * 734 * @category group 735 * @param stdClass|cm_info $cm course module object 736 * @param string|moodle_url $urlroot return address that users get to if they choose an option; 737 * should include any parameters needed, e.g. "$CFG->wwwroot/mod/forum/view.php?id=34" 738 * @param bool $return return as string instead of printing 739 * @param bool $hideallparticipants If true, this prevents the 'All participants' 740 * option from appearing in cases where it normally would. This is intended for 741 * use only by activities that cannot display all groups together. (Note that 742 * selecting this option does not prevent groups_get_activity_group from 743 * returning 0; it will still do that if the user has chosen 'all participants' 744 * in another activity, or not chosen anything.) 745 * @return mixed void or string depending on $return param 746 */ 747 function groups_print_activity_menu($cm, $urlroot, $return=false, $hideallparticipants=false) { 748 global $USER, $OUTPUT; 749 750 if ($urlroot instanceof moodle_url) { 751 // no changes necessary 752 753 } else { 754 if (strpos($urlroot, 'http') !== 0) { // Will also work for https 755 // Display error if urlroot is not absolute (this causes the non-JS version to break) 756 debugging('groups_print_activity_menu requires absolute URL for ' . 757 '$urlroot, not <tt>' . s($urlroot) . '</tt>. Example: ' . 758 'groups_print_activity_menu($cm, $CFG->wwwroot . \'/mod/mymodule/view.php?id=13\');', 759 DEBUG_DEVELOPER); 760 } 761 $urlroot = new moodle_url($urlroot); 762 } 763 764 if (!$groupmode = groups_get_activity_groupmode($cm)) { 765 if ($return) { 766 return ''; 767 } else { 768 return; 769 } 770 } 771 772 $context = context_module::instance($cm->id); 773 $aag = has_capability('moodle/site:accessallgroups', $context); 774 775 $usergroups = array(); 776 if ($groupmode == VISIBLEGROUPS or $aag) { 777 $allowedgroups = groups_get_all_groups($cm->course, 0, $cm->groupingid); // any group in grouping 778 // Get user's own groups and put to the top. 779 $usergroups = groups_get_all_groups($cm->course, $USER->id, $cm->groupingid); 780 } else { 781 $allowedgroups = groups_get_all_groups($cm->course, $USER->id, $cm->groupingid); // only assigned groups 782 } 783 784 $activegroup = groups_get_activity_group($cm, true, $allowedgroups); 785 786 $groupsmenu = array(); 787 if ((!$allowedgroups or $groupmode == VISIBLEGROUPS or $aag) and !$hideallparticipants) { 788 $groupsmenu[0] = get_string('allparticipants'); 789 } 790 791 $groupsmenu += groups_sort_menu_options($allowedgroups, $usergroups); 792 793 if ($groupmode == VISIBLEGROUPS) { 794 $grouplabel = get_string('groupsvisible'); 795 } else { 796 $grouplabel = get_string('groupsseparate'); 797 } 798 799 if ($aag and $cm->groupingid) { 800 if ($grouping = groups_get_grouping($cm->groupingid)) { 801 $grouplabel = $grouplabel . ' (' . format_string($grouping->name) . ')'; 802 } 803 } 804 805 if (count($groupsmenu) == 1) { 806 $groupname = reset($groupsmenu); 807 $output = $grouplabel.': '.$groupname; 808 } else { 809 $select = new single_select($urlroot, 'group', $groupsmenu, $activegroup, null, 'selectgroup'); 810 $select->label = $grouplabel; 811 $output = $OUTPUT->render($select); 812 } 813 814 $output = '<div class="groupselector">'.$output.'</div>'; 815 816 if ($return) { 817 return $output; 818 } else { 819 echo $output; 820 } 821 } 822 823 /** 824 * Returns group active in course, changes the group by default if 'group' page param present 825 * 826 * @category group 827 * @param stdClass $course course bject 828 * @param bool $update change active group if group param submitted 829 * @param array $allowedgroups list of groups user may access (INTERNAL, to be used only from groups_print_course_menu()) 830 * @return mixed false if groups not used, int if groups used, 0 means all groups (access must be verified in SEPARATE mode) 831 */ 832 function groups_get_course_group($course, $update=false, $allowedgroups=null) { 833 global $USER, $SESSION; 834 835 if (!$groupmode = $course->groupmode) { 836 // NOGROUPS used 837 return false; 838 } 839 840 $context = context_course::instance($course->id); 841 if (has_capability('moodle/site:accessallgroups', $context)) { 842 $groupmode = 'aag'; 843 } 844 845 if (!is_array($allowedgroups)) { 846 if ($groupmode == VISIBLEGROUPS or $groupmode === 'aag') { 847 $allowedgroups = groups_get_all_groups($course->id, 0, $course->defaultgroupingid); 848 } else { 849 $allowedgroups = groups_get_all_groups($course->id, $USER->id, $course->defaultgroupingid); 850 } 851 } 852 853 _group_verify_activegroup($course->id, $groupmode, $course->defaultgroupingid, $allowedgroups); 854 855 // set new active group if requested 856 $changegroup = optional_param('group', -1, PARAM_INT); 857 if ($update and $changegroup != -1) { 858 859 if ($changegroup == 0) { 860 // do not allow changing to all groups without accessallgroups capability 861 if ($groupmode == VISIBLEGROUPS or $groupmode === 'aag') { 862 $SESSION->activegroup[$course->id][$groupmode][$course->defaultgroupingid] = 0; 863 } 864 865 } else { 866 if ($allowedgroups and array_key_exists($changegroup, $allowedgroups)) { 867 $SESSION->activegroup[$course->id][$groupmode][$course->defaultgroupingid] = $changegroup; 868 } 869 } 870 } 871 872 return $SESSION->activegroup[$course->id][$groupmode][$course->defaultgroupingid]; 873 } 874 875 /** 876 * Returns group active in activity, changes the group by default if 'group' page param present 877 * 878 * @category group 879 * @param stdClass|cm_info $cm course module object 880 * @param bool $update change active group if group param submitted 881 * @param array $allowedgroups list of groups user may access (INTERNAL, to be used only from groups_print_activity_menu()) 882 * @return mixed false if groups not used, int if groups used, 0 means all groups (access must be verified in SEPARATE mode) 883 */ 884 function groups_get_activity_group($cm, $update=false, $allowedgroups=null) { 885 global $USER, $SESSION; 886 887 if (!$groupmode = groups_get_activity_groupmode($cm)) { 888 // NOGROUPS used 889 return false; 890 } 891 892 $context = context_module::instance($cm->id); 893 if (has_capability('moodle/site:accessallgroups', $context)) { 894 $groupmode = 'aag'; 895 } 896 897 if (!is_array($allowedgroups)) { 898 if ($groupmode == VISIBLEGROUPS or $groupmode === 'aag') { 899 $allowedgroups = groups_get_all_groups($cm->course, 0, $cm->groupingid); 900 } else { 901 $allowedgroups = groups_get_all_groups($cm->course, $USER->id, $cm->groupingid); 902 } 903 } 904 905 _group_verify_activegroup($cm->course, $groupmode, $cm->groupingid, $allowedgroups); 906 907 // set new active group if requested 908 $changegroup = optional_param('group', -1, PARAM_INT); 909 if ($update and $changegroup != -1) { 910 911 if ($changegroup == 0) { 912 // allgroups visible only in VISIBLEGROUPS or when accessallgroups 913 if ($groupmode == VISIBLEGROUPS or $groupmode === 'aag') { 914 $SESSION->activegroup[$cm->course][$groupmode][$cm->groupingid] = 0; 915 } 916 917 } else { 918 if ($allowedgroups and array_key_exists($changegroup, $allowedgroups)) { 919 $SESSION->activegroup[$cm->course][$groupmode][$cm->groupingid] = $changegroup; 920 } 921 } 922 } 923 924 return $SESSION->activegroup[$cm->course][$groupmode][$cm->groupingid]; 925 } 926 927 /** 928 * Gets a list of groups that the user is allowed to access within the 929 * specified activity. 930 * 931 * @category group 932 * @param stdClass|cm_info $cm Course-module 933 * @param int $userid User ID (defaults to current user) 934 * @return array An array of group objects, or false if none 935 */ 936 function groups_get_activity_allowed_groups($cm,$userid=0) { 937 // Use current user by default 938 global $USER; 939 if(!$userid) { 940 $userid=$USER->id; 941 } 942 943 // Get groupmode for activity, taking into account course settings 944 $groupmode=groups_get_activity_groupmode($cm); 945 946 // If visible groups mode, or user has the accessallgroups capability, 947 // then they can access all groups for the activity... 948 $context = context_module::instance($cm->id); 949 if ($groupmode == VISIBLEGROUPS or has_capability('moodle/site:accessallgroups', $context, $userid)) { 950 return groups_get_all_groups($cm->course, 0, $cm->groupingid); 951 } else { 952 // ...otherwise they can only access groups they belong to 953 return groups_get_all_groups($cm->course, $userid, $cm->groupingid); 954 } 955 } 956 957 /** 958 * Determine if a given group is visible to user or not in a given context. 959 * 960 * @since Moodle 2.6 961 * @param int $groupid Group id to test. 0 for all groups. 962 * @param stdClass $course Course object. 963 * @param stdClass $cm Course module object. 964 * @param int $userid user id to test against. Defaults to $USER. 965 * @return boolean true if visible, false otherwise 966 */ 967 function groups_group_visible($groupid, $course, $cm = null, $userid = null) { 968 global $USER; 969 970 if (empty($userid)) { 971 $userid = $USER->id; 972 } 973 974 $groupmode = empty($cm) ? groups_get_course_groupmode($course) : groups_get_activity_groupmode($cm, $course); 975 if ($groupmode == NOGROUPS || $groupmode == VISIBLEGROUPS) { 976 // Groups are not used, or everything is visible, no need to go any further. 977 return true; 978 } 979 980 $context = empty($cm) ? context_course::instance($course->id) : context_module::instance($cm->id); 981 if (has_capability('moodle/site:accessallgroups', $context, $userid)) { 982 // User can see everything. Groupid = 0 is handled here as well. 983 return true; 984 } else if ($groupid != 0) { 985 // Group mode is separate, and user doesn't have access all groups capability. Check if user can see requested group. 986 $groups = empty($cm) ? groups_get_all_groups($course->id, $userid) : groups_get_activity_allowed_groups($cm, $userid); 987 if (array_key_exists($groupid, $groups)) { 988 // User can see the group. 989 return true; 990 } 991 } 992 return false; 993 } 994 995 /** 996 * Get sql and parameters that will return user ids for a group or groups 997 * 998 * @param int|array $groupids Where this is an array of multiple groups, it will match on members of any of the groups 999 * @param context $context Course context or a context within a course. Mandatory when $groupid = USERSWITHOUTGROUP 1000 * @param int $groupsjointype Join type logic used. Defaults to 'Any' (logical OR). 1001 * @return array($sql, $params) 1002 * @throws coding_exception if empty or invalid context submitted when $groupid = USERSWITHOUTGROUP 1003 */ 1004 function groups_get_members_ids_sql($groupids, context $context = null, $groupsjointype = GROUPS_JOIN_ANY) { 1005 if (!is_array($groupids)) { 1006 $groupids = [$groupids]; 1007 } 1008 1009 $groupjoin = groups_get_members_join($groupids, 'u.id', $context, $groupsjointype); 1010 1011 $sql = "SELECT DISTINCT u.id 1012 FROM {user} u 1013 $groupjoin->joins 1014 WHERE u.deleted = 0"; 1015 if (!empty($groupjoin->wheres)) { 1016 $sql .= ' AND '. $groupjoin->wheres; 1017 } 1018 1019 return array($sql, $groupjoin->params); 1020 } 1021 1022 /** 1023 * Get sql join to return users in a group 1024 * 1025 * @param int|array $groupids The groupids, 0 or [] means all groups and USERSWITHOUTGROUP no group 1026 * @param string $useridcolumn The column of the user id from the calling SQL, e.g. u.id 1027 * @param context $context Course context or a context within a course. Mandatory when $groupids includes USERSWITHOUTGROUP 1028 * @param int $jointype Join type logic used. Defaults to 'Any' (logical OR). 1029 * @return \core\dml\sql_join Contains joins, wheres, params 1030 * @throws coding_exception if empty or invalid context submitted when $groupid = USERSWITHOUTGROUP 1031 */ 1032 function groups_get_members_join($groupids, $useridcolumn, context $context = null, int $jointype = GROUPS_JOIN_ANY) { 1033 global $DB; 1034 1035 // Use unique prefix just in case somebody makes some SQL magic with the result. 1036 static $i = 0; 1037 $i++; 1038 $prefix = 'gm' . $i . '_'; 1039 1040 if (!is_array($groupids)) { 1041 $groupids = $groupids ? [$groupids] : []; 1042 } 1043 1044 $join = ''; 1045 $where = ''; 1046 $param = []; 1047 1048 $coursecontext = (!empty($context)) ? $context->get_course_context() : null; 1049 if (in_array(USERSWITHOUTGROUP, $groupids) && empty($coursecontext)) { 1050 // Throw an exception if $context is empty or invalid because it's needed to get the users without any group. 1051 throw new coding_exception('Missing or wrong $context parameter in an attempt to get members without any group'); 1052 } 1053 1054 // Handle cases where we need to include/exclude users not in any groups. 1055 if (($nogroupskey = array_search(USERSWITHOUTGROUP, $groupids)) !== false) { 1056 // Get members without any group. 1057 $join .= "LEFT JOIN ( 1058 SELECT g.courseid, m.groupid, m.userid 1059 FROM {groups_members} m 1060 JOIN {groups} g ON g.id = m.groupid 1061 ) {$prefix}gm ON ({$prefix}gm.userid = {$useridcolumn} AND {$prefix}gm.courseid = :{$prefix}gcourseid)"; 1062 1063 // Join type 'None' when filtering by 'no groups' means match users in at least one group. 1064 if ($jointype == GROUPS_JOIN_NONE) { 1065 $where = "{$prefix}gm.userid IS NOT NULL"; 1066 } else { 1067 // All other cases need to match users not in any group. 1068 $where = "{$prefix}gm.userid IS NULL"; 1069 } 1070 1071 $param = ["{$prefix}gcourseid" => $coursecontext->instanceid]; 1072 unset($groupids[$nogroupskey]); 1073 } 1074 1075 // Handle any specified groups that need to be included. 1076 if (!empty($groupids)) { 1077 switch ($jointype) { 1078 case GROUPS_JOIN_ALL: 1079 // Handle matching all of the provided groups (logical AND). 1080 $joinallwheres = []; 1081 $aliaskey = 0; 1082 foreach ($groupids as $groupid) { 1083 $gmalias = "{$prefix}gm{$aliaskey}"; 1084 $aliaskey++; 1085 $join .= "LEFT JOIN {groups_members} {$gmalias} 1086 ON ({$gmalias}.userid = {$useridcolumn} AND {$gmalias}.groupid = :{$gmalias}param)"; 1087 $joinallwheres[] = "{$gmalias}.userid IS NOT NULL"; 1088 $param["{$gmalias}param"] = $groupid; 1089 } 1090 1091 // Members of all of the specified groups only. 1092 if (empty($where)) { 1093 $where = '(' . implode(' AND ', $joinallwheres) . ')'; 1094 } else { 1095 // Members of the specified groups and also no groups. 1096 // NOTE: This will always return no results, because you cannot be in specified groups and also be in no groups. 1097 $where = '(' . $where . ' AND ' . implode(' AND ', $joinallwheres) . ')'; 1098 } 1099 1100 break; 1101 1102 case GROUPS_JOIN_ANY: 1103 // Handle matching any of the provided groups (logical OR). 1104 list($groupssql, $groupsparams) = $DB->get_in_or_equal($groupids, SQL_PARAMS_NAMED, $prefix); 1105 1106 $join .= "LEFT JOIN {groups_members} {$prefix}gm2 1107 ON ({$prefix}gm2.userid = {$useridcolumn} AND {$prefix}gm2.groupid {$groupssql})"; 1108 $param = array_merge($param, $groupsparams); 1109 1110 // Members of any of the specified groups only. 1111 if (empty($where)) { 1112 $where = "{$prefix}gm2.userid IS NOT NULL"; 1113 } else { 1114 // Members of any of the specified groups or no groups. 1115 $where = "({$where} OR {$prefix}gm2.userid IS NOT NULL)"; 1116 } 1117 1118 break; 1119 1120 case GROUPS_JOIN_NONE: 1121 // Handle matching none of the provided groups (logical NOT). 1122 list($groupssql, $groupsparams) = $DB->get_in_or_equal($groupids, SQL_PARAMS_NAMED, $prefix); 1123 1124 $join .= "LEFT JOIN {groups_members} {$prefix}gm2 1125 ON ({$prefix}gm2.userid = {$useridcolumn} AND {$prefix}gm2.groupid {$groupssql})"; 1126 $param = array_merge($param, $groupsparams); 1127 1128 // Members of none of the specified groups only. 1129 if (empty($where)) { 1130 $where = "{$prefix}gm2.userid IS NULL"; 1131 } else { 1132 // Members of any unspecified groups (not a member of the specified groups, and not a member of no groups). 1133 $where = "({$where} AND {$prefix}gm2.userid IS NULL)"; 1134 } 1135 1136 break; 1137 } 1138 } 1139 1140 return new \core\dml\sql_join($join, $where, $param); 1141 } 1142 1143 /** 1144 * Internal method, sets up $SESSION->activegroup and verifies previous value 1145 * 1146 * @param int $courseid 1147 * @param int|string $groupmode SEPARATEGROUPS, VISIBLEGROUPS or 'aag' (access all groups) 1148 * @param int $groupingid 0 means all groups 1149 * @param array $allowedgroups list of groups user can see 1150 */ 1151 function _group_verify_activegroup($courseid, $groupmode, $groupingid, array $allowedgroups) { 1152 global $SESSION, $USER; 1153 1154 // init activegroup array if necessary 1155 if (!isset($SESSION->activegroup)) { 1156 $SESSION->activegroup = array(); 1157 } 1158 if (!array_key_exists($courseid, $SESSION->activegroup)) { 1159 $SESSION->activegroup[$courseid] = array(SEPARATEGROUPS=>array(), VISIBLEGROUPS=>array(), 'aag'=>array()); 1160 } 1161 1162 // make sure that the current group info is ok 1163 if (array_key_exists($groupingid, $SESSION->activegroup[$courseid][$groupmode]) and !array_key_exists($SESSION->activegroup[$courseid][$groupmode][$groupingid], $allowedgroups)) { 1164 // active group does not exist anymore or is 0 1165 if ($SESSION->activegroup[$courseid][$groupmode][$groupingid] > 0 or $groupmode == SEPARATEGROUPS) { 1166 // do not do this if all groups selected and groupmode is not separate 1167 unset($SESSION->activegroup[$courseid][$groupmode][$groupingid]); 1168 } 1169 } 1170 1171 // set up defaults if necessary 1172 if (!array_key_exists($groupingid, $SESSION->activegroup[$courseid][$groupmode])) { 1173 if ($groupmode == 'aag') { 1174 $SESSION->activegroup[$courseid][$groupmode][$groupingid] = 0; // all groups by default if user has accessallgroups 1175 1176 } else if ($allowedgroups) { 1177 if ($groupmode != SEPARATEGROUPS and $mygroups = groups_get_all_groups($courseid, $USER->id, $groupingid)) { 1178 $firstgroup = reset($mygroups); 1179 } else { 1180 $firstgroup = reset($allowedgroups); 1181 } 1182 $SESSION->activegroup[$courseid][$groupmode][$groupingid] = $firstgroup->id; 1183 1184 } else { 1185 // this happen when user not assigned into group in SEPARATEGROUPS mode or groups do not exist yet 1186 // mod authors must add extra checks for this when SEPARATEGROUPS mode used (such as when posting to forum) 1187 $SESSION->activegroup[$courseid][$groupmode][$groupingid] = 0; 1188 } 1189 } 1190 } 1191 1192 /** 1193 * Caches group data for a particular course to speed up subsequent requests. 1194 * 1195 * @param int $courseid The course id to cache data for. 1196 * @param cache $cache The cache if it has already been initialised. If not a new one will be created. 1197 * @return stdClass A data object containing groups, groupings, and mappings. 1198 */ 1199 function groups_cache_groupdata($courseid, cache $cache = null) { 1200 global $DB; 1201 1202 if ($cache === null) { 1203 // Initialise a cache if we wern't given one. 1204 $cache = cache::make('core', 'groupdata'); 1205 } 1206 1207 // Get the groups that belong to the course. 1208 $groups = $DB->get_records('groups', array('courseid' => $courseid), 'name ASC'); 1209 // Get the groupings that belong to the course. 1210 $groupings = $DB->get_records('groupings', array('courseid' => $courseid), 'name ASC'); 1211 1212 if (!is_array($groups)) { 1213 $groups = array(); 1214 } 1215 1216 if (!is_array($groupings)) { 1217 $groupings = array(); 1218 } 1219 1220 if (!empty($groupings)) { 1221 // Finally get the mappings between the two. 1222 list($insql, $params) = $DB->get_in_or_equal(array_keys($groupings)); 1223 $mappings = $DB->get_records_sql(" 1224 SELECT gg.id, gg.groupingid, gg.groupid 1225 FROM {groupings_groups} gg 1226 JOIN {groups} g ON g.id = gg.groupid 1227 WHERE gg.groupingid $insql 1228 ORDER BY g.name ASC", $params); 1229 } else { 1230 $mappings = array(); 1231 } 1232 1233 // Prepare the data array. 1234 $data = new stdClass; 1235 $data->groups = $groups; 1236 $data->groupings = $groupings; 1237 $data->mappings = $mappings; 1238 // Cache the data. 1239 $cache->set($courseid, $data); 1240 // Finally return it so it can be used if desired. 1241 return $data; 1242 } 1243 1244 /** 1245 * Gets group data for a course. 1246 * 1247 * This returns an object with the following properties: 1248 * - groups : An array of all the groups in the course. 1249 * - groupings : An array of all the groupings within the course. 1250 * - mappings : An array of group to grouping mappings. 1251 * 1252 * @param int $courseid The course id to get data for. 1253 * @param cache $cache The cache if it has already been initialised. If not a new one will be created. 1254 * @return stdClass 1255 */ 1256 function groups_get_course_data($courseid, cache $cache = null) { 1257 if ($cache === null) { 1258 // Initialise a cache if we wern't given one. 1259 $cache = cache::make('core', 'groupdata'); 1260 } 1261 // Try to retrieve it from the cache. 1262 $data = $cache->get($courseid); 1263 if ($data === false) { 1264 $data = groups_cache_groupdata($courseid, $cache); 1265 } 1266 return $data; 1267 } 1268 1269 /** 1270 * Determine if the current user can see at least one of the groups of the specified user. 1271 * 1272 * @param stdClass $course Course object. 1273 * @param int $userid user id to check against. 1274 * @param stdClass $cm Course module object. Optional, just for checking at activity level instead course one. 1275 * @return boolean true if visible, false otherwise 1276 * @since Moodle 2.9 1277 */ 1278 function groups_user_groups_visible($course, $userid, $cm = null) { 1279 global $USER; 1280 1281 $groupmode = empty($cm) ? groups_get_course_groupmode($course) : groups_get_activity_groupmode($cm, $course); 1282 if ($groupmode == NOGROUPS || $groupmode == VISIBLEGROUPS) { 1283 // Groups are not used, or everything is visible, no need to go any further. 1284 return true; 1285 } 1286 1287 $context = empty($cm) ? context_course::instance($course->id) : context_module::instance($cm->id); 1288 if (has_capability('moodle/site:accessallgroups', $context)) { 1289 // User can see everything. 1290 return true; 1291 } else { 1292 // Group mode is separate, and user doesn't have access all groups capability. 1293 if (empty($cm)) { 1294 $usergroups = groups_get_all_groups($course->id, $userid); 1295 $currentusergroups = groups_get_all_groups($course->id, $USER->id); 1296 } else { 1297 $usergroups = groups_get_activity_allowed_groups($cm, $userid); 1298 $currentusergroups = groups_get_activity_allowed_groups($cm, $USER->id); 1299 } 1300 1301 $samegroups = array_intersect_key($currentusergroups, $usergroups); 1302 if (!empty($samegroups)) { 1303 // We share groups! 1304 return true; 1305 } 1306 } 1307 return false; 1308 } 1309 1310 /** 1311 * Returns the users in the specified groups. 1312 * 1313 * This function does not return complete user objects by default. It returns the user_picture basic fields. 1314 * 1315 * @param array $groupsids The list of groups ids to check 1316 * @param array $extrafields extra fields to be included in result 1317 * @param int $sort optional sorting of returned users 1318 * @return array|bool Returns an array of the users for the specified group or false if no users or an error returned. 1319 * @since Moodle 3.3 1320 */ 1321 function groups_get_groups_members($groupsids, $extrafields=null, $sort='lastname ASC') { 1322 global $DB; 1323 1324 $userfields = user_picture::fields('u', $extrafields); 1325 list($insql, $params) = $DB->get_in_or_equal($groupsids); 1326 1327 return $DB->get_records_sql("SELECT $userfields 1328 FROM {user} u, {groups_members} gm 1329 WHERE u.id = gm.userid AND gm.groupid $insql 1330 GROUP BY $userfields 1331 ORDER BY $sort", $params); 1332 } 1333 1334 /** 1335 * Returns users who share group membership with the specified user in the given actiivty. 1336 * 1337 * @param stdClass|cm_info $cm course module 1338 * @param int $userid user id (empty for current user) 1339 * @return array a list of user 1340 * @since Moodle 3.3 1341 */ 1342 function groups_get_activity_shared_group_members($cm, $userid = null) { 1343 global $USER; 1344 1345 if (empty($userid)) { 1346 $userid = $USER; 1347 } 1348 1349 $groupsids = array_keys(groups_get_activity_allowed_groups($cm, $userid)); 1350 // No groups no users. 1351 if (empty($groupsids)) { 1352 return []; 1353 } 1354 return groups_get_groups_members($groupsids); 1355 }
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