access.php

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<?php

$class = elgg_extract_class($vars, 'elgg-access');

$access_id = elgg_extract('value', $vars);

$entity = elgg_extract('entity', $vars);
if ($entity instanceof ElggEntity) {
    $access_id = $entity->access_id;
}

if (!isset($access_id)) {
    return;
}

$access_id = (int) $access_id;
switch ($access_id) {
    case ACCESS_PUBLIC :
        $class[] = 'elgg-access-public';
        break;

    case ACCESS_LOGGED_IN :
        $class[] = 'elgg-access-loggedin';
        break;

    case ACCESS_PRIVATE :
        $class[] = 'elgg-access-private';
        break;
    
    default:
        $collection = elgg_get_access_collection($access_id);
        $owner = false;
        if ($collection) {
            $owner = get_entity($collection->owner_guid);
        }
        if ($owner instanceof ElggGroup) {
            $class[] = 'elgg-access-group';
            $membership = $owner->membership;
            if ($membership == ACCESS_PUBLIC) {
                $class[] = 'elgg-access-group-open';
            } else {
                $class[] = 'elgg-access-group-closed';
            }
        } else {
            if ($collection && !empty($collection->getSubtype())) {
                $class[] = 'elgg-access-' . elgg_get_friendly_title($collection->getSubtype());
            } else {
                $class[] = 'elgg-access-limited';
            }
        }
        break;
}

echo elgg_format_element([
    '#tag_name' => 'span',
    '#text' => elgg_get_readable_access_level($access_id),
    '#options' => [
        'encode_text' => true,
    ],
    'title' => elgg_echo('access:help'),
    'class' => $class,
]);