statistics.php

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<?php
use Elgg\Database\Clauses\OrderByClause;

function get_entity_statistics($owner_guid = 0) {

    $owner_guid = (int) $owner_guid;
    $entity_stats = [];

    $grouped_entities = elgg_get_entities([
        'selects' => ['COUNT(*) as cnt'],
        'owner_guids' => ($owner_guid) ? : ELGG_ENTITIES_ANY_VALUE,
        'group_by' => ['e.type', 'e.subtype'],
        'limit' => 0,
        'order_by' => new OrderByClause('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] = [];
            }
            $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) {

    $where = new \Elgg\Database\Clauses\EntityWhereClause();
    $where->type_subtype_pairs = [
        'user' => null,
    ];

    if ($show_deactivated) {
        $where->use_enabled_clause = false;
    }

    $select = \Elgg\Database\Select::fromTable('entities', 'e');
    $select->select('COUNT(DISTINCT e.guid) AS count');
    $select->addClause($where, 'e');

    $result = _elgg_services()->db->getDataRow($select);
    if (!empty($result)) {
        return (int) $result->count;
    }

    return 0;
}

function get_online_users(array $options = []) {
    $options = array_merge([
        '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');
};