crm.fsf.org/20131203/files/sites/all/modules-new/civicrm/CRM/ACL/API.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 4.6                                                |
   5  +--------------------------------------------------------------------+
   6  | Copyright CiviCRM LLC (c) 2004-2015                                |
   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         |
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  17  | See the GNU Affero General Public License for more details.        |
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  19  | You should have received a copy of the GNU Affero General Public   |
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  22  | at info[AT]civicrm[DOT]org. If you have questions about the        |
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  24  | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
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  26  */
  27
  28 /**
  29  *
  30  * @package CRM
  31  * @copyright CiviCRM LLC (c) 2004-2015
  32  * $Id$
  33  *
  34  */
  35 class CRM_ACL_API {
  36
  37   /**
  38    * The various type of permissions.
  39    *
  40    * @var int
  41    */
  42   const EDIT = 1;
  43   const VIEW = 2;
  44   const DELETE = 3;
  45   const CREATE = 4;
  46   const SEARCH = 5;
  47   const ALL = 6;
  48
  49   /**
  50    * Given a permission string, check for access requirements
  51    *
  52    * @param string $str
  53    *   The permission to check.
  54    * @param int $contactID
  55    *   The contactID for whom the check is made.
  56    *
  57    * @return bool
  58    *   true if yes, else false
  59    */
  60   public static function check($str, $contactID = NULL) {
  61     if ($contactID == NULL) {
  62       $session = CRM_Core_Session::singleton();
  63       $contactID = $session->get('userID');
  64     }
  65
  66     if (!$contactID) {
  67       // anonymous user
  68       $contactID = 0;
  69     }
  70
  71     return CRM_ACL_BAO_ACL::check($str, $contactID);
  72   }
  73
  74   /**
  75    * Get the permissioned where clause for the user.
  76    *
  77    * @param int $type
  78    *   The type of permission needed.
  79    * @param array $tables
  80    *   (reference ) add the tables that are needed for the select clause.
  81    * @param array $whereTables
  82    *   (reference ) add the tables that are needed for the where clause.
  83    * @param int $contactID
  84    *   The contactID for whom the check is made.
  85    * @param bool $onlyDeleted
  86    *   Whether to include only deleted contacts.
  87    * @param bool $skipDeleteClause
  88    *   Don't add delete clause if this is true,.
  89    *   this means it is handled by generating query
  90    *
  91    * @return string
  92    *   the group where clause for this user
  93    */
  94   public static function whereClause(
  95     $type,
  96     &$tables,
  97     &$whereTables,
  98     $contactID = NULL,
  99     $onlyDeleted = FALSE,
 100     $skipDeleteClause = FALSE
 101   ) {
 102     // the default value which is valid for the final AND
 103     $deleteClause = ' ( 1 ) ';
 104     if (!$skipDeleteClause) {
 105       if (CRM_Core_Permission::check('access deleted contacts') and $onlyDeleted) {
 106         $deleteClause = '(contact_a.is_deleted)';
 107       }
 108       else {
 109         // CRM-6181
 110         $deleteClause = '(contact_a.is_deleted = 0)';
 111       }
 112     }
 113
 114     // first see if the contact has edit / view all contacts
 115     if (CRM_Core_Permission::check('edit all contacts') ||
 116       ($type == self::VIEW && CRM_Core_Permission::check('view all contacts'))
 117     ) {
 118       return $deleteClause;
 119     }
 120
 121     if (!$contactID) {
 122       $contactID = CRM_Core_Session::getLoggedInContactID();
 123     }
 124     $contactID = (int) $contactID;
 125
 126     $where = implode(' AND ',
 127       array(
 128         CRM_ACL_BAO_ACL::whereClause($type,
 129           $tables,
 130           $whereTables,
 131           $contactID
 132         ),
 133         $deleteClause,
 134       )
 135     );
 136
 137     // Add permission on self
 138     if ($contactID && (CRM_Core_Permission::check('edit my contact') ||
 139       $type == self::VIEW && CRM_Core_Permission::check('view my contact'))
 140     ) {
 141       $where = "(contact_a.id = $contactID OR ($where))";
 142     }
 143     return $where;
 144   }
 145
 146   /**
 147    * Get all the groups the user has access to for the given operation.
 148    *
 149    * @param int $type
 150    *   The type of permission needed.
 151    * @param int $contactID
 152    *   The contactID for whom the check is made.
 153    *
 154    * @param string $tableName
 155    * @param null $allGroups
 156    * @param null $includedGroups
 157    *
 158    * @return array
 159    *   the ids of the groups for which the user has permissions
 160    */
 161   public static function group(
 162     $type,
 163     $contactID = NULL,
 164     $tableName = 'civicrm_saved_search',
 165     $allGroups = NULL,
 166     $includedGroups = NULL
 167   ) {
 168     if ($contactID == NULL) {
 169       $session = CRM_Core_Session::singleton();
 170       $contactID = $session->get('userID');
 171     }
 172
 173     if (!$contactID) {
 174       // anonymous user
 175       $contactID = 0;
 176     }
 177
 178     return CRM_ACL_BAO_ACL::group($type, $contactID, $tableName, $allGroups, $includedGroups);
 179   }
 180
 181   /**
 182    * Check if the user has access to this group for operation $type
 183    *
 184    * @param int $type
 185    *   The type of permission needed.
 186    * @param int $groupID
 187    * @param int $contactID
 188    *   The contactID for whom the check is made.
 189    * @param string $tableName
 190    * @param null $allGroups
 191    * @param null $includedGroups
 192    * @param bool $flush
 193    *
 194    * @return array
 195    *   the ids of the groups for which the user has permissions
 196    */
 197   public static function groupPermission(
 198     $type,
 199     $groupID,
 200     $contactID = NULL,
 201     $tableName = 'civicrm_saved_search',
 202     $allGroups = NULL,
 203     $includedGroups = NULL,
 204     $flush = FALSE
 205   ) {
 206
 207     static $cache = array();
 208     $groups = array();
 209     //@todo this is pretty hacky!!!
 210     //adding a way for unit tests to flush the cache
 211     if ($flush) {
 212       $cache = array();
 213       return NULL;
 214     }
 215     if (!$contactID) {
 216       $session = CRM_Core_Session::singleton();
 217       $contactID = NULL;
 218       if ($session->get('userID')) {
 219         $contactID = $session->get('userID');
 220       }
 221     }
 222
 223     $key = "{$tableName}_{$type}_{$contactID}";
 224     if (array_key_exists($key, $cache)) {
 225       $groups = &$cache[$key];
 226     }
 227     else {
 228       $groups = self::group($type, $contactID, $tableName, $allGroups, $includedGroups);
 229       $cache[$key] = $groups;
 230     }
 231     if (empty($groups)) {
 232       return FALSE;
 233     }
 234
 235     return in_array($groupID, $groups) ? TRUE : FALSE;
 236   }
 237
 238 }