access.php

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<?php
// bail if set to a unusable value
if (isset($vars['options_values'])) {
    if (!is_array($vars['options_values']) || empty($vars['options_values'])) {
        return;
    }
}

$entity_allows_comments = elgg_extract('entity_allows_comments', $vars, true);
unset($vars['entity_allows_comments']);

$vars['class'] = (array) elgg_extract('class', $vars, []);
$vars['class'][] = 'elgg-input-access';

// this will be passed to plugin hooks ['access:collections:write', 'user'] and ['default', 'access']
$params = array();

$keys = array(
    'entity' => null,
    'entity_type' => null,
    'entity_subtype' => null,
    'container_guid' => null,
    'purpose' => 'read',
);
foreach ($keys as $key => $default_value) {
    $params[$key] = elgg_extract($key, $vars, $default_value);
    unset($vars[$key]);
}

/* @var ElggEntity $entity */
$entity = $params['entity'];

if ($entity) {
    $params['value'] = $entity->access_id;
    $params['entity_type'] = $entity->type;
    $params['entity_subtype'] = $entity->getSubtype();
    $params['container_guid'] = $entity->container_guid;

    if ($entity_allows_comments && ($entity->access_id != ACCESS_PUBLIC)) {
        $vars['data-comment-count'] = (int) $entity->countComments();
        $vars['data-original-value'] = $entity->access_id;
    }
}

$container = elgg_get_page_owner_entity();
if (!$params['container_guid'] && $container) {
    $params['container_guid'] = $container->guid;
}

// don't call get_default_access() unless we need it
if (!isset($vars['value']) || $vars['value'] == ACCESS_DEFAULT) {
    if ($entity) {
        $vars['value'] = $entity->access_id;
    } else if (empty($vars['options_values']) || !is_array($vars['options_values'])) {
        $vars['value'] = get_default_access(null, $params);
    } else {
        $options_values_ids = array_keys($vars['options_values']);
        $vars['value'] = $options_values_ids[0];
    }
}

$params['value'] = $vars['value'];

// don't call get_write_access_array() unless we need it
if (!isset($vars['options_values'])) {
    $vars['options_values'] = get_write_access_array(0, 0, false, $params);
}

if (!isset($vars['disabled'])) {
    $vars['disabled'] = false;
}

// if access is set to a value not present in the available options, add the option
if (!isset($vars['options_values'][$vars['value']])) {
    $acl = get_access_collection($vars['value']);
    $display = $acl ? $acl->name : elgg_echo('access:missing_name');
    $vars['options_values'][$vars['value']] = $display;
}

// should we tell users that public/logged-in access levels will be ignored?
if (($container instanceof ElggGroup)
    && $container->getContentAccessMode() === ElggGroup::CONTENT_ACCESS_MODE_MEMBERS_ONLY
    && !elgg_in_context('group-edit')
    && !($entity instanceof ElggGroup)) {
    $show_override_notice = true;
} else {
    $show_override_notice = false;
}

if ($show_override_notice) {
    $vars['data-group-acl'] = $container->group_acl;
}
echo elgg_view('input/select', $vars);
if ($show_override_notice) {
    echo elgg_format_element('p', ['class' => 'elgg-text-help'], elgg_echo('access:overridenotice'));
}