site_id))) $site_id = $CONFIG->site_id; $user_id = (int) $user_id; $site_id = (int) $site_id; if (empty($access_list[$user_id]) || $flush == true) { $access_list[$user_id] = "(" . implode(",",get_access_array($user_id, $site_id, $flush)) . ")"; } return $access_list[$user_id]; } /** * Gets an array of access restrictions the given user is allowed to see on this site * * @param int $user_id User ID; defaults to currently logged in user * @param int $site_id Site ID; defaults to current site * @param boolean $flush If set to true, will refresh the access list from the database * @return array An array of access groups suitable for injection in an SQL call */ function get_access_array($user_id = 0, $site_id = 0, $flush = false) { global $CONFIG; static $access_array; if (!isset($access_array)) $access_array = array(); if ($user_id == 0) $user_id = $_SESSION['guid']; if (($site_id == 0) && (isset($CONFIG->site_id))) $site_id = $CONFIG->site_id; $user_id = (int) $user_id; $site_id = (int) $site_id; if (empty($access_array[$user_id]) || $flush == true) { $query = "select am.access_group_id from {$CONFIG->dbprefix}access_group_membership am "; $query .= " left join {$CONFIG->dbprefix}access_groups ag on ag.id = am.access_group_id "; $query .= " where am.user_guid = {$user_id} and (ag.site_guid = {$site_id} or ag.site_guid = 0)"; $tmp_access_array = array(2); if (isloggedin()) $tmp_access_array[] = 1; if ($groups = get_data($query)) { foreach($groups as $group) $tmp_access_array[] = $group->access_group_id; } $access_array[$user_id] = $tmp_access_array; } return $access_array[$user_id]; } /** * Add access restriction sql code to a given query. * * Note that if this code is executed in privileged mode it will return blank. * * TODO: DELETE once Query classes are fully integrated * * @param string $table_prefix Optional xxx. prefix for the access code. */ function get_access_sql_suffix($table_prefix = "") { $sql = ""; if ($table_prefix) $table_prefix = sanitise_string($table_prefix) . "."; //if (!is_privileged()) //{ $access = get_access_list(); $sql = " ({$table_prefix}access_id in {$access} or ({$table_prefix}access_id = 0 and {$table_prefix}owner_guid = {$_SESSION['id']}))"; //} //else // $sql = " 1 "; // Only return 'active' objects $sql .= " and {$table_prefix}enabled='yes'"; return $sql; } /** * Returns an array of access permissions that the specified user is allowed to save objects with. * Permissions are of the form ('id' => 'Description') * * @param int $user_id The user's GUID. * @param int $site_id The current site. * @param true|false $flush If this is set to true, this will shun any cached version * @return array List of access permissions= */ function get_write_access_array($user_id = 0, $site_id = 0, $flush = false) { global $CONFIG; static $access_array; if ($user_id == 0) $user_id = $_SESSION['guid']; if (($site_id == 0) && (isset($CONFIG->site_id))) $site_id = $CONFIG->site_id; $user_id = (int) $user_id; $site_id = (int) $site_id; if (empty($access_array[$user_id]) || $flush == true) { $query = "select ag.* from {$CONFIG->dbprefix}access_groups ag "; $query .= " where (ag.site_guid = {$site_id} or ag.site_guid = 0)"; $query .= " and (ag.owner_guid = {$user_id} or ag.owner_guid = 0)"; $tmp_access_array = array(); if ($groups = get_data($query)) { foreach($groups as $group) $tmp_access_array[$group->id] = elgg_echo($group->name); } $tmp_access_array = trigger_plugin_hook('access','user',array('user_id' => $user_id, 'site_id' => $site_id),$tmp_access_array); $access_array[$user_id] = $tmp_access_array; } return $access_array[$user_id]; } /** * Creates a new access control group owned by the specified user. * * @param string $name The name of the group. * @param int $owner_guid The GUID of the owner (default: currently logged in user). * @param int $site_guid The GUID of the site (default: current site). * @return int|false Depending on success (the group ID if successful). */ function create_access_group($name, $owner_guid = 0, $site_guid = 0) { $name = trim($name); if (empty($name)) return false; if ($user_id == 0) $user_id = $_SESSION['id']; if (($site_id == 0) && (isset($CONFIG->site_id))) $site_id = $CONFIG->site_id; $name = sanitise_string($name); global $CONFIG; return insert_data("insert into {$CONFIG->dbprefix}access_groups set name = '{$name}', owner_guid = {$owner_guid}, site_guid = {$site_guid}"); } /** * Deletes a specified access group * * @param int $group_id The group ID * @return true|false Depending on success */ function delete_access_group($group_id) { $group_id = (int) $group_id; $groups = get_write_access_array(); if (in_array($group_id,$groups)) { global $CONFIG; delete_data("delete from {$CONFIG->dbprefix}access_group_membership where access_group_id = {$group_id}"); delete_data("delete from {$CONFIG->dbprefix}access_groups where id = {$group_id}"); return true; } else { return false; } } /** * Adds a user to the specified user group * * @param int $user_guid The GUID of the user to add * @param int $group_id The ID of the group to add them to * @return true|false Depending on success */ function add_user_to_access_group($user_guid, $group_id) { $group_id = (int) $group_id; $user_guid = (int) $user_guid; $groups = get_write_access_array(); if (in_array($group_id, $groups) && $user = get_user($user_guid)) { global $CONFIG; insert_data("insert into {$CONFIG->dbprefix}access_group_membership set access_group_id = {$group_id}, user_guid = {$user_guid}"); return true; } return false; } /** * Removes a user from an access group * * @param int $user_guid The user GUID * @param int $group_id The access group ID * @return true|false Depending on success */ function remove_user_from_access_group($user_guid, $group_id) { $group_id = (int) $group_id; $user_guid = (int) $user_guid; $groups = get_write_access_array(); if (in_array($group_id, $groups) && $user = get_user($user_guid)) { global $CONFIG; delete_data("delete from {$CONFIG->dbprefix}access_group_membership where access_group_id = {$group_id} and user_guid = {$user_guid}"); return true; } return false; } /** * Some useful constant definitions */ define('ACCESS_PRIVATE',0); define('ACCESS_LOGGED_IN',1); define('ACCESS_PUBLIC',2); ?>