responses.php

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

// allow river views to override the response content
$responses = elgg_extract('responses', $vars);
if (isset($responses)) {
    echo $responses;
    return;
}

$item = elgg_extract('item', $vars);
if (!$item instanceof ElggRiverItem) {
    return;
}

$object = $item->getObjectEntity();

// annotations and comments do not have responses
if (!empty($item->annotation_id) || !$object instanceof ElggEntity || $object instanceof ElggComment) {
    return;
}

if (!$object->hasCapability('commentable')) {
    return;
}

$comment_count = $object->countComments();

if ($comment_count) {
    $comments = elgg_get_entities([
        'type' => 'object',
        'subtype' => 'comment',
        'container_guid' => $object->guid,
        'limit' => 3,
        'order_by' => [new OrderByClause('time_created', 'DESC')],
        'distinct' => false,
        'metadata_name_value_pairs' => ['level' => 1],
    ]);

    // why is this reversing it? because we're asking for the 3 latest
    // comments by sorting desc and limiting by 3, but we want to display
    // these comments with the latest at the bottom.
    $comments = array_reverse($comments);
    
    echo elgg_view_entity_list($comments, [
        'list_class' => 'elgg-river-comments',
        'show_excerpt' => true,
        'register_rss_link' => false,
        'show_responses' => false,
    ]);
    
    if ($comment_count > count($comments)) {
        $all_link = elgg_view_url($object->getURL(), elgg_echo('river:comments:all', [$comment_count]));
        echo elgg_format_element('div', ['class' => 'elgg-river-more'], $all_link);
    }
}

if (!$object->canComment()) {
    return;
}

// inline comment form
$form_vars = ['id' => "comments-add-{$object->guid}-{$item->id}", 'class' => 'hidden'];
$body_vars = ['entity' => $object, 'inline' => true];
echo elgg_view_form('comment/save', $form_vars, $body_vars);