CRM/Core/Permission.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 4.6                                                |
   5  +--------------------------------------------------------------------+
   6  | Copyright CiviCRM LLC (c) 2004-2014                                |
   7  +--------------------------------------------------------------------+
   8  | This file is a part of CiviCRM.                                    |
   9  |                                                                    |
  10  | CiviCRM is free software; you can copy, modify, and distribute it  |
  11  | under the terms of the GNU Affero General Public License           |
  12  | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
  13  |                                                                    |
  14  | CiviCRM is distributed in the hope that it will be useful, but     |
  15  | WITHOUT ANY WARRANTY; without even the implied warranty of         |
  16  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
  17  | See the GNU Affero General Public License for more details.        |
  18  |                                                                    |
  19  | You should have received a copy of the GNU Affero General Public   |
  20  | License and the CiviCRM Licensing Exception along                  |
  21  | with this program; if not, contact CiviCRM LLC                     |
  22  | at info[AT]civicrm[DOT]org. If you have questions about the        |
  23  | GNU Affero General Public License or the licensing of CiviCRM,     |
  24  | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
  25  +--------------------------------------------------------------------+
  26 */
  27
  28 /**
  29  *
  30  * @package CRM
  31  * @copyright CiviCRM LLC (c) 2004-2014
  32  * $Id$
  33  *
  34  */
  35
  36 /**
  37  * This is the basic permission class wrapper
  38  */
  39 class CRM_Core_Permission {
  40
  41   /**
  42    * Static strings used to compose permissions
  43    *
  44    * @const
  45    * @var string
  46    */
  47   const EDIT_GROUPS = 'edit contacts in ', VIEW_GROUPS = 'view contacts in ';
  48
  49   /**
  50    * The various type of permissions
  51    *
  52    * @var int
  53    */
  54   const EDIT = 1, VIEW = 2, DELETE = 3, CREATE = 4, SEARCH = 5, ALL = 6, ADMIN = 7;
  55
  56   /**
  57    * A placeholder permission which always fails
  58    */
  59   const ALWAYS_DENY_PERMISSION = "*always deny*";
  60
  61   /**
  62    * A placeholder permission which always fails
  63    */
  64   const ALWAYS_ALLOW_PERMISSION = "*always allow*";
  65
  66   /**
  67    * Various authentication sources
  68    *
  69    * @var int
  70    */
  71   const AUTH_SRC_UNKNOWN = 0, AUTH_SRC_CHECKSUM = 1, AUTH_SRC_SITEKEY = 2, AUTH_SRC_LOGIN = 4;
  72
  73   /**
  74    * Get the current permission of this user
  75    *
  76    * @return string
  77    *   the permission of the user (edit or view or null)
  78    */
  79   public static function getPermission() {
  80     $config = CRM_Core_Config::singleton();
  81     return $config->userPermissionClass->getPermission();
  82   }
  83
  84   /**
  85    * Given a permission string or array, check for access requirements
  86    * @param mixed $permissions
  87    *   The permission to check as an array or string -see examples.
  88    *   arrays
  89    *
  90    *  Ex 1
  91    *
  92    *  Must have 'access CiviCRM'
  93    *  (string) 'access CiviCRM'
  94    *
  95    *
  96    *  Ex 2 Must have 'access CiviCRM' and 'access Ajax API'
  97    *   array('access CiviCRM', 'access Ajax API')
  98    *
  99    *  Ex 3 Must have 'access CiviCRM' or 'access Ajax API'
 100    *   array(
 101    *      array('access CiviCRM', 'access Ajax API'),
 102    *   ),
 103    *
 104    *  Ex 4 Must have 'access CiviCRM' or 'access Ajax API' AND 'access CiviEvent'
 105    *  array(
 106    *    array('access CiviCRM', 'access Ajax API'),
 107    *    'access CiviEvent',
 108    *   ),
 109    *
 110    *  Note that in permissions.php this is keyed by the action eg.
 111    *  (access Civi || access AJAX) && (access CiviEvent || access CiviContribute)
 112    *  'myaction' => array(
 113    *    array('access CiviCRM', 'access Ajax API'),
 114    *    array('access CiviEvent', 'access CiviContribute')
 115    *  ),
 116    *
 117    * @return bool
 118    *   true if yes, else false
 119    */
 120   public static function check($permissions) {
 121     $permissions = (array) $permissions;
 122
 123     foreach ($permissions as $permission) {
 124       if (is_array($permission)) {
 125         foreach ($permission as $orPerm) {
 126           if (self::check($orPerm)) {
 127             //one of our 'or' permissions has succeeded - stop checking this permission
 128             return TRUE;;
 129           }
 130         }
 131         //none of our our conditions was met
 132         return FALSE;
 133       }
 134       else {
 135         if (!CRM_Core_Config::singleton()->userPermissionClass->check($permission)) {
 136           //one of our 'and' conditions has not been met
 137           return FALSE;
 138         }
 139       }
 140     }
 141     return TRUE;
 142   }
 143
 144   /**
 145    * Determine if any one of the permissions strings applies to current user
 146    *
 147    * @param array $perms
 148    * @return bool
 149    */
 150   public static function checkAnyPerm($perms) {
 151     foreach ($perms as $perm) {
 152       if (CRM_Core_Permission::check($perm)) {
 153         return TRUE;
 154       }
 155     }
 156     return FALSE;
 157   }
 158
 159   /**
 160    * Given a group/role array, check for access requirements
 161    *
 162    * @param array $array
 163    *   The group/role to check.
 164    *
 165    * @return bool
 166    *   true if yes, else false
 167    */
 168   public static function checkGroupRole($array) {
 169     $config = CRM_Core_Config::singleton();
 170     return $config->userPermissionClass->checkGroupRole($array);
 171   }
 172
 173   /**
 174    * Get the permissioned where clause for the user
 175    *
 176    * @param int $type
 177    *   The type of permission needed.
 178    * @param array $tables
 179    *   (reference ) add the tables that are needed for the select clause.
 180    * @param array $whereTables
 181    *   (reference ) add the tables that are needed for the where clause.
 182    *
 183    * @return string
 184    *   the group where clause for this user
 185    */
 186   public static function getPermissionedStaticGroupClause($type, &$tables, &$whereTables) {
 187     $config = CRM_Core_Config::singleton();
 188     return $config->userPermissionClass->getPermissionedStaticGroupClause($type, $tables, $whereTables);
 189   }
 190
 191   /**
 192    * Get all groups from database, filtered by permissions
 193    * for this user
 194    *
 195    * @param string $groupType
 196    *   Type of group(Access/Mailing).
 197    * @param bool $excludeHidden
 198    *   exclude hidden groups.
 199    *
 200    *
 201    * @return array
 202    *   array reference of all groups.
 203    */
 204   public static function group($groupType, $excludeHidden = TRUE) {
 205     $config = CRM_Core_Config::singleton();
 206     return $config->userPermissionClass->group($groupType, $excludeHidden);
 207   }
 208
 209   /**
 210    * @return bool
 211    */
 212   public static function customGroupAdmin() {
 213     $admin = FALSE;
 214
 215     // check if user has all powerful permission
 216     // or administer civicrm permission (CRM-1905)
 217     if (self::check('access all custom data')) {
 218       return TRUE;
 219     }
 220
 221     if (
 222       self::check('administer Multiple Organizations') &&
 223       self::isMultisiteEnabled()
 224     ) {
 225       return TRUE;
 226     }
 227
 228     if (self::check('administer CiviCRM')) {
 229       return TRUE;
 230     }
 231
 232     return FALSE;
 233   }
 234
 235   /**
 236    * @param int $type
 237    * @param bool $reset
 238    *
 239    * @return array
 240    */
 241   public static function customGroup($type = CRM_Core_Permission::VIEW, $reset = FALSE) {
 242     $customGroups = CRM_Core_PseudoConstant::get('CRM_Core_DAO_CustomField', 'custom_group_id',
 243       array('fresh' => $reset));
 244     $defaultGroups = array();
 245
 246     // check if user has all powerful permission
 247     // or administer civicrm permission (CRM-1905)
 248     if (self::customGroupAdmin()) {
 249       $defaultGroups = array_keys($customGroups);
 250     }
 251
 252     return CRM_ACL_API::group($type, NULL, 'civicrm_custom_group', $customGroups, $defaultGroups);
 253   }
 254
 255   /**
 256    * @param int $type
 257    * @param null $prefix
 258    * @param bool $reset
 259    *
 260    * @return string
 261    */
 262   public static function customGroupClause($type = CRM_Core_Permission::VIEW, $prefix = NULL, $reset = FALSE) {
 263     if (self::customGroupAdmin()) {
 264       return ' ( 1 ) ';
 265     }
 266
 267     $groups = self::customGroup($type, $reset);
 268     if (empty($groups)) {
 269       return ' ( 0 ) ';
 270     }
 271     else {
 272       return "{$prefix}id IN ( " . implode(',', $groups) . ' ) ';
 273     }
 274   }
 275
 276   /**
 277    * @param int $gid
 278    * @param int $type
 279    *
 280    * @return bool
 281    */
 282   public static function ufGroupValid($gid, $type = CRM_Core_Permission::VIEW) {
 283     if (empty($gid)) {
 284       return TRUE;
 285     }
 286
 287     $groups = self::ufGroup($type);
 288     return !empty($groups) && in_array($gid, $groups) ? TRUE : FALSE;
 289   }
 290
 291   /**
 292    * @param int $type
 293    *
 294    * @return array
 295    */
 296   public static function ufGroup($type = CRM_Core_Permission::VIEW) {
 297     $ufGroups = CRM_Core_PseudoConstant::get('CRM_Core_DAO_UFField', 'uf_group_id');
 298
 299     $allGroups = array_keys($ufGroups);
 300
 301     // check if user has all powerful permission
 302     if (self::check('profile listings and forms')) {
 303       return $allGroups;
 304     }
 305
 306     switch ($type) {
 307       case CRM_Core_Permission::VIEW:
 308         if (self::check('profile view')) {
 309           return $allGroups;
 310         }
 311         break;
 312
 313       case CRM_Core_Permission::CREATE:
 314         if (self::check('profile create')) {
 315           return $allGroups;
 316         }
 317         break;
 318
 319       case CRM_Core_Permission::EDIT:
 320         if (self::check('profile edit')) {
 321           return $allGroups;
 322         }
 323         break;
 324
 325       case CRM_Core_Permission::SEARCH:
 326         if (self::check('profile listings')) {
 327           return $allGroups;
 328         }
 329         break;
 330     }
 331
 332     return CRM_ACL_API::group($type, NULL, 'civicrm_uf_group', $ufGroups);
 333   }
 334
 335   /**
 336    * @param int $type
 337    * @param null $prefix
 338    * @param bool $returnUFGroupIds
 339    *
 340    * @return array|string
 341    */
 342   public static function ufGroupClause($type = CRM_Core_Permission::VIEW, $prefix = NULL, $returnUFGroupIds = FALSE) {
 343     $groups = self::ufGroup($type);
 344     if ($returnUFGroupIds) {
 345       return $groups;
 346     }
 347     elseif (empty($groups)) {
 348       return ' ( 0 ) ';
 349     }
 350     else {
 351       return "{$prefix}id IN ( " . implode(',', $groups) . ' ) ';
 352     }
 353   }
 354
 355   /**
 356    * @param int $type
 357    * @param int $eventID
 358    * @param string $context
 359    *
 360    * @return array|null
 361    */
 362   public static function event($type = CRM_Core_Permission::VIEW, $eventID = NULL, $context = '') {
 363     if (!empty($context)) {
 364       if (CRM_Core_Permission::check($context)) {
 365         return TRUE;
 366       }
 367     }
 368     $events = CRM_Event_PseudoConstant::event(NULL, TRUE);
 369     $includeEvents = array();
 370
 371     // check if user has all powerful permission
 372     if (self::check('register for events')) {
 373       $includeEvents = array_keys($events);
 374     }
 375
 376     if ($type == CRM_Core_Permission::VIEW &&
 377       self::check('view event info')
 378     ) {
 379       $includeEvents = array_keys($events);
 380     }
 381
 382     $permissionedEvents = CRM_ACL_API::group($type, NULL, 'civicrm_event', $events, $includeEvents);
 383     if (!$eventID) {
 384       return $permissionedEvents;
 385     }
 386     if (!empty($permissionedEvents)) {
 387       return array_search($eventID, $permissionedEvents) === FALSE ? NULL : $eventID;
 388     }
 389     return NULL;
 390   }
 391
 392   /**
 393    * @param int $type
 394    * @param null $prefix
 395    *
 396    * @return string
 397    */
 398   public static function eventClause($type = CRM_Core_Permission::VIEW, $prefix = NULL) {
 399     $events = self::event($type);
 400     if (empty($events)) {
 401       return ' ( 0 ) ';
 402     }
 403     else {
 404       return "{$prefix}id IN ( " . implode(',', $events) . ' ) ';
 405     }
 406   }
 407
 408   /**
 409    * @param $module
 410    * @param bool $checkPermission
 411    *
 412    * @return bool
 413    */
 414   public static function access($module, $checkPermission = TRUE) {
 415     $config = CRM_Core_Config::singleton();
 416
 417     if (!in_array($module, $config->enableComponents)) {
 418       return FALSE;
 419     }
 420
 421     if ($checkPermission) {
 422       if ($module == 'CiviCase') {
 423         return CRM_Case_BAO_Case::accessCiviCase();
 424       }
 425       else {
 426         return CRM_Core_Permission::check("access $module");
 427       }
 428     }
 429
 430     return TRUE;
 431   }
 432
 433   /**
 434    * Check permissions for delete and edit actions
 435    *
 436    * @param string $module
 437    *   Component name.
 438    * @param int $action
 439    *   Action to be check across component.
 440    *
 441    *
 442    * @return bool
 443    */
 444   public static function checkActionPermission($module, $action) {
 445     //check delete related permissions.
 446     if ($action & CRM_Core_Action::DELETE) {
 447       $permissionName = "delete in $module";
 448     }
 449     else {
 450       $editPermissions = array(
 451         'CiviEvent' => 'edit event participants',
 452         'CiviMember' => 'edit memberships',
 453         'CiviPledge' => 'edit pledges',
 454         'CiviContribute' => 'edit contributions',
 455         'CiviGrant' => 'edit grants',
 456         'CiviMail' => 'access CiviMail',
 457         'CiviAuction' => 'add auction items',
 458       );
 459       $permissionName = CRM_Utils_Array::value($module, $editPermissions);
 460     }
 461
 462     if ($module == 'CiviCase' && !$permissionName) {
 463       return CRM_Case_BAO_Case::accessCiviCase();
 464     }
 465     else {
 466       //check for permission.
 467       return CRM_Core_Permission::check($permissionName);
 468     }
 469   }
 470
 471   /**
 472    * @param $args
 473    * @param string $op
 474    *
 475    * @return bool
 476    */
 477   public static function checkMenu(&$args, $op = 'and') {
 478     if (!is_array($args)) {
 479       return $args;
 480     }
 481     foreach ($args as $str) {
 482       $res = CRM_Core_Permission::check($str);
 483       if ($op == 'or' && $res) {
 484         return TRUE;
 485       }
 486       elseif ($op == 'and' && !$res) {
 487         return FALSE;
 488       }
 489     }
 490     return ($op == 'or') ? FALSE : TRUE;
 491   }
 492
 493   /**
 494    * @param $item
 495    *
 496    * @return bool|mixed
 497    * @throws Exception
 498    */
 499   public static function checkMenuItem(&$item) {
 500     if (!array_key_exists('access_callback', $item)) {
 501       CRM_Core_Error::backtrace();
 502       CRM_Core_Error::fatal();
 503     }
 504
 505     // if component_id is present, ensure it is enabled
 506     if (isset($item['component_id']) &&
 507       $item['component_id']
 508     ) {
 509       $config = CRM_Core_Config::singleton();
 510       if (is_array($config->enableComponentIDs) &&
 511         in_array($item['component_id'], $config->enableComponentIDs)
 512       ) {
 513         // continue with process
 514       }
 515       else {
 516         return FALSE;
 517       }
 518     }
 519
 520     // the following is imitating drupal 6 code in includes/menu.inc
 521     if (empty($item['access_callback']) ||
 522       is_numeric($item['access_callback'])
 523     ) {
 524       return (boolean ) $item['access_callback'];
 525     }
 526
 527     // check whether the following Ajax requests submitted the right key
 528     // FIXME: this should be integrated into ACLs proper
 529     if (CRM_Utils_Array::value('page_type', $item) == 3) {
 530       if (!CRM_Core_Key::validate($_REQUEST['key'], $item['path'])) {
 531         return FALSE;
 532       }
 533     }
 534
 535     // check if callback is for checkMenu, if so optimize it
 536     if (is_array($item['access_callback']) &&
 537       $item['access_callback'][0] == 'CRM_Core_Permission' &&
 538       $item['access_callback'][1] == 'checkMenu'
 539     ) {
 540       $op = CRM_Utils_Array::value(1, $item['access_arguments'], 'and');
 541       return self::checkMenu($item['access_arguments'][0], $op);
 542     }
 543     else {
 544       return call_user_func_array($item['access_callback'], $item['access_arguments']);
 545     }
 546   }
 547
 548   /**
 549    * @param bool $all
 550    *
 551    * @return array
 552    */
 553   public static function &basicPermissions($all = FALSE) {
 554     static $permissions = NULL;
 555
 556     if (!$permissions) {
 557       $config = CRM_Core_Config::singleton();
 558       $prefix = ts('CiviCRM') . ': ';
 559       $permissions = self::getCorePermissions();
 560
 561       if (self::isMultisiteEnabled()) {
 562         $permissions['administer Multiple Organizations'] = $prefix . ts('administer Multiple Organizations');
 563       }
 564
 565       if (!$all) {
 566         $components = CRM_Core_Component::getEnabledComponents();
 567       }
 568       else {
 569         $components = CRM_Core_Component::getComponents();
 570       }
 571
 572       foreach ($components as $comp) {
 573         $perm = $comp->getPermissions();
 574         if ($perm) {
 575           $info = $comp->getInfo();
 576           foreach ($perm as $p) {
 577             $permissions[$p] = $info['translatedName'] . ': ' . $p;
 578           }
 579         }
 580       }
 581
 582       // Add any permissions defined in hook_civicrm_permission implementations.
 583       $module_permissions = $config->userPermissionClass->getAllModulePermissions();
 584       $permissions = array_merge($permissions, $module_permissions);
 585     }
 586
 587     return $permissions;
 588   }
 589
 590   /**
 591    * @return array
 592    */
 593   public static function getAnonymousPermissionsWarnings() {
 594     static $permissions = array();
 595     if (empty($permissions)) {
 596       $permissions = array(
 597         'administer CiviCRM',
 598       );
 599       $components = CRM_Core_Component::getComponents();
 600       foreach ($components as $comp) {
 601         if (!method_exists($comp, 'getAnonymousPermissionWarnings')) {
 602           continue;
 603         }
 604         $permissions = array_merge($permissions, $comp->getAnonymousPermissionWarnings());
 605       }
 606     }
 607     return $permissions;
 608   }
 609
 610   /**
 611    * @param $anonymous_perms
 612    *
 613    * @return array
 614    */
 615   public static function validateForPermissionWarnings($anonymous_perms) {
 616     return array_intersect($anonymous_perms, self::getAnonymousPermissionsWarnings());
 617   }
 618
 619   /**
 620    * @return array
 621    */
 622   public static function getCorePermissions() {
 623     $prefix = ts('CiviCRM') . ': ';
 624     $permissions = array(
 625       'add contacts' => $prefix . ts('add contacts'),
 626       'view all contacts' => $prefix . ts('view all contacts'),
 627       'edit all contacts' => $prefix . ts('edit all contacts'),
 628       'view my contact' => $prefix . ts('view my contact'),
 629       'edit my contact' => $prefix . ts('edit my contact'),
 630       'delete contacts' => $prefix . ts('delete contacts'),
 631       'access deleted contacts' => $prefix . ts('access deleted contacts'),
 632       'import contacts' => $prefix . ts('import contacts'),
 633       'edit groups' => $prefix . ts('edit groups'),
 634       'administer CiviCRM' => $prefix . ts('administer CiviCRM'),
 635       'skip IDS check' => $prefix . ts('skip IDS check'),
 636       'access uploaded files' => $prefix . ts('access uploaded files'),
 637       'profile listings and forms' => $prefix . ts('profile listings and forms'),
 638       'profile listings' => $prefix . ts('profile listings'),
 639       'profile create' => $prefix . ts('profile create'),
 640       'profile edit' => $prefix . ts('profile edit'),
 641       'profile view' => $prefix . ts('profile view'),
 642       'access all custom data' => $prefix . ts('access all custom data'),
 643       'view all activities' => $prefix . ts('view all activities'),
 644       'delete activities' => $prefix . ts('delete activities'),
 645       'access CiviCRM' => $prefix . ts('access CiviCRM'),
 646       'access Contact Dashboard' => $prefix . ts('access Contact Dashboard'),
 647       'translate CiviCRM' => $prefix . ts('translate CiviCRM'),
 648       'administer reserved groups' => $prefix . ts('administer reserved groups'),
 649       'administer Tagsets' => $prefix . ts('administer Tagsets'),
 650       'administer reserved tags' => $prefix . ts('administer reserved tags'),
 651       'administer dedupe rules' => $prefix . ts('administer dedupe rules'),
 652       'merge duplicate contacts' => $prefix . ts('merge duplicate contacts'),
 653       'view debug output' => $prefix . ts('view debug output'),
 654       'view all notes' => $prefix . ts('view all notes'),
 655       'access AJAX API' => $prefix . ts('access AJAX API'),
 656       'access contact reference fields' => $prefix . ts('access contact reference fields'),
 657       'create manual batch' => $prefix . ts('create manual batch'),
 658       'edit own manual batches' => $prefix . ts('edit own manual batches'),
 659       'edit all manual batches' => $prefix . ts('edit all manual batches'),
 660       'view own manual batches' => $prefix . ts('view own manual batches'),
 661       'view all manual batches' => $prefix . ts('view all manual batches'),
 662       'delete own manual batches' => $prefix . ts('delete own manual batches'),
 663       'delete all manual batches' => $prefix . ts('delete all manual batches'),
 664       'export own manual batches' => $prefix . ts('export own manual batches'),
 665       'export all manual batches' => $prefix . ts('export all manual batches'),
 666       'administer payment processors' => $prefix . ts('administer payment processors'),
 667     );
 668
 669     return $permissions;
 670   }
 671
 672   /**
 673    * Validate user permission across
 674    * edit or view or with supportable acls.
 675    *
 676    * @return bool
 677    */
 678   public static function giveMeAllACLs() {
 679     if (CRM_Core_Permission::check('view all contacts') ||
 680       CRM_Core_Permission::check('edit all contacts')
 681     ) {
 682       return TRUE;
 683     }
 684
 685     $session = CRM_Core_Session::singleton();
 686     $contactID = $session->get('userID');
 687
 688     //check for acl.
 689     $aclPermission = self::getPermission();
 690     if (in_array($aclPermission, array(
 691       CRM_Core_Permission::EDIT,
 692       CRM_Core_Permission::VIEW,
 693     ))
 694     ) {
 695       return TRUE;
 696     }
 697
 698     // run acl where hook and see if the user is supplying an ACL clause
 699     // that is not false
 700     $tables = $whereTables = array();
 701     $where = NULL;
 702
 703     CRM_Utils_Hook::aclWhereClause(CRM_Core_Permission::VIEW,
 704       $tables, $whereTables,
 705       $contactID, $where
 706     );
 707     return empty($whereTables) ? FALSE : TRUE;
 708   }
 709
 710   /**
 711    * Get component name from given permission.
 712    *
 713    * @param string $permission
 714    *
 715    * @return null|string
 716    *   the name of component.
 717    */
 718   public static function getComponentName($permission) {
 719     $componentName = NULL;
 720     $permission = trim($permission);
 721     if (empty($permission)) {
 722       return $componentName;
 723     }
 724
 725     static $allCompPermissions = array();
 726     if (empty($allCompPermissions)) {
 727       $components = CRM_Core_Component::getComponents();
 728       foreach ($components as $name => $comp) {
 729         //get all permissions of each components unconditionally
 730         $allCompPermissions[$name] = $comp->getPermissions(TRUE);
 731       }
 732     }
 733
 734     if (is_array($allCompPermissions)) {
 735       foreach ($allCompPermissions as $name => $permissions) {
 736         if (in_array($permission, $permissions)) {
 737           $componentName = $name;
 738           break;
 739         }
 740       }
 741     }
 742
 743     return $componentName;
 744   }
 745
 746   /**
 747    * Get all the contact emails for users that have a specific permission
 748    *
 749    * @param string $permissionName
 750    *   Name of the permission we are interested in.
 751    *
 752    * @return string
 753    *   a comma separated list of email addresses
 754    */
 755   public static function permissionEmails($permissionName) {
 756     $config = CRM_Core_Config::singleton();
 757     return $config->userPermissionClass->permissionEmails($permissionName);
 758   }
 759
 760   /**
 761    * Get all the contact emails for users that have a specific role
 762    *
 763    * @param string $roleName
 764    *   Name of the role we are interested in.
 765    *
 766    * @return string
 767    *   a comma separated list of email addresses
 768    */
 769   public static function roleEmails($roleName) {
 770     $config = CRM_Core_Config::singleton();
 771     return $config->userRoleClass->roleEmails($roleName);
 772   }
 773
 774   /**
 775    * @return bool
 776    */
 777   public static function isMultisiteEnabled() {
 778     return CRM_Core_BAO_Setting::getItem(CRM_Core_BAO_Setting::MULTISITE_PREFERENCES_NAME,
 779       'is_enabled'
 780     ) ? TRUE : FALSE;
 781   }
 782 }