statistics.php

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<?php
function get_entity_statistics($owner_guid = 0) {

    $owner_guid = (int) $owner_guid;
    $entity_stats = array();

    $grouped_entities = elgg_get_entities(array(
        'selects' => array('COUNT(*) as cnt'),
        'owner_guids' => ($owner_guid) ? : ELGG_ENTITIES_ANY_VALUE,
        'group_by' => 'e.type, e.subtype',
        'limit' => 0,
        'order_by' => 'cnt DESC',
    ));
    
    if (!empty($grouped_entities)) {
        foreach ($grouped_entities as $entity) {
            $type = $entity->getType();
            if (!isset($entity_stats[$type]) || !is_array($entity_stats[$type])) {
                $entity_stats[$type] = array();
            }
            $subtype = $entity->getSubtype();
            if (!$subtype) {
                $subtype = '__base__';
            }
            $entity_stats[$type][$subtype] = $entity->getVolatileData('select:cnt');
        }
    }

    return $entity_stats;
}

function get_number_users($show_deactivated = false) {
    global $CONFIG;

    $access = "";

    if (!$show_deactivated) {
        $access = "and " . _elgg_get_access_where_sql(array('table_alias' => ''));
    }

    $query = "SELECT count(*) as count
        from {$CONFIG->dbprefix}entities where type='user' $access";

    $result = get_data_row($query);

    if ($result) {
        return $result->count;
    }

    return false;
}

function get_online_users(array $options = array()) {
    $options = array_merge(array(
        'seconds' => 600,
    ), $options);

    return elgg_list_entities($options, 'find_active_users');
}

function statistics_init() {
    elgg_extend_view('core/settings/statistics', 'core/settings/statistics/online');
    elgg_extend_view('core/settings/statistics', 'core/settings/statistics/numentities');
}

return function(\Elgg\EventsService $events, \Elgg\HooksRegistrationService $hooks) {
    $events->registerHandler('init', 'system', 'statistics_init');
};