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<?php
/**
* Elgg statistics library.
* This file contains a number of functions for obtaining statistics about the running system.
* These statistics are mainly used by the administration pages, and is also where the basic views for statistics
* are added.
*
* @package Elgg
* @subpackage Core
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
* @author Marcus Povey
* @copyright Curverider Ltd 2008
* @link http://elgg.org/
*/
/**
* Return an array reporting the number of various entities in the system.
*
* @param int $owner_guid Optional owner of the statistics
* @return array
*/
function get_entity_statistics($owner_guid = 0)
{
global $CONFIG;
$entity_stats = array();
$owner_guid = (int)$owner_guid;
$query = "SELECT distinct e.type,s.subtype,e.subtype as subtype_id from {$CONFIG->dbprefix}entities e left join {$CONFIG->dbprefix}entity_subtypes s on e.subtype=s.id";
$owner_query = "";
if ($owner_guid) {
$query .= " where owner_guid=$owner_guid";
$owner_query = "and owner_guid=$owner_guid ";
}
// Get a list of major types
$types = get_data($query);
foreach ($types as $type) {
if (!is_array($entity_stats[$type->type]))
$entity_stats[$type->type] = array(); // assume there are subtypes for now
$query = "SELECT count(*) as count from {$CONFIG->dbprefix}entities where type='{$type->type}' $owner_query";
if ($type->subtype) $query.= " and subtype={$type->subtype_id}";
$subtype_cnt = get_data_row($query);
if ($type->subtype)
$entity_stats[$type->type][$type->subtype] = $subtype_cnt->count;
else
$entity_stats[$type->type]['__base__'] = $subtype_cnt->count;
}
return $entity_stats;
}
/**
* Return the number of users registered in the system.
*
* @return int
*/
function get_number_users()
{
global $CONFIG;
$result = get_data_row("SELECT count(*) as count from {$CONFIG->dbprefix}entities where type='user'");
if ($result)
return $result->count;
return false;
}
/**
* Return a list of how many users are currently online, rendered as a view.
*/
function get_online_users()
{
$objects = find_active_users();
if ($objects)
{
return elgg_view_entity_list($objects, count($objects), 0, 10);
}
}
/**
* Initialise the statistics admin page.
*/
function statistics_init()
{
extend_elgg_admin_page('admin/statistics_opt/basic', 'admin/statistics');
extend_elgg_admin_page('admin/statistics_opt/numentities', 'admin/statistics');
extend_elgg_admin_page('admin/statistics_opt/online', 'admin/statistics');
extend_elgg_admin_page('usersettings/statistics_opt/numentities', 'usersettings/statistics');
}
/// Register init function
register_elgg_event_handler('init','system','statistics_init');
?>
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