comments.php

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

$entity = elgg_extract('entity', $vars);
if (!$entity instanceof \ElggEntity) {
    return;
}

$show_add_form = elgg_extract('show_add_form', $vars, true);

$latest_first = elgg_comments_are_latest_first($entity);

$limit = elgg_extract('limit', $vars, get_input('limit'));
if (!isset($limit)) {
    $limit = elgg_comments_per_page($entity);
}

$module_vars = [
    'id' => elgg_extract('id', $vars, 'comments'),
    'class' => elgg_extract_class($vars, 'elgg-comments'),
];

$options = [
    'type' => 'object',
    'subtype' => 'comment',
    'container_guid' => $entity->guid,
    'full_view' => true,
    'limit' => $limit,
    'offset' => (int) get_input('offset'),
    'distinct' => false,
    'url_fragment' => $module_vars['id'],
    'order_by' => [new OrderByClause('e.guid', $latest_first ? 'DESC' : 'ASC')],
    'list_class' => 'comments-list',
    'pagination' => true,
    'preload_owners' => true,
];

$module_title = '';

if (!$entity instanceof \ElggComment) {
    $module_title = elgg_echo('comments');
    
    $options['metadata_name_value_pairs'] = ['level' => 1];
    
    $show_guid = (int) elgg_extract('show_guid', $vars);
    if ($show_guid && $limit) {
        // show the offset that includes the comment
        $count = elgg_count_entities([
            'type' => 'object',
            'subtype' => 'comment',
            'container_guid' => $entity->guid,
            'metadata_name_value_pairs' => ['level' => 1],
            'wheres' => [
                function(QueryBuilder $qb) use ($show_guid, $latest_first) {
                    $operator = $latest_first ? '>' : '<';
                    
                    return $qb->compare('e.guid', $operator, $show_guid, ELGG_VALUE_INTEGER);
                },
            ],
        ]);
        $options['offset'] = (int) floor($count / $limit) * $limit;
    }
    
    $comments = elgg_get_entities($options);
    
    $count_options = $options;
    unset($count_options['offset']);
    $options['count'] = elgg_count_entities($count_options);
    
    // preload comment threads
    elgg()->thread_preloader->preloadThreads($comments);
} else {
    $comments = elgg()->thread_preloader->getChildren($entity->guid);
    
    // load children of thread
    $options['limit'] = false;
    $options['offset'] = 0;
    $options['pagination'] = false;
    $options['count'] = count($comments);
    
    $module_vars['header'] = false;
}

$comments_list = elgg_view_entity_list($comments, $options);

$content = $comments_list;
$form = '';

$show_login_form = $comments_list ? $show_add_form : false;
$show_login_form = elgg_extract('show_login_form', $vars, $show_login_form);

if ($show_add_form && $entity->canComment()) {
    $form_vars = [
        'id' => "elgg-form-comment-save-{$entity->guid}",
        'prevent_double_submit' => false,
    ];
    if ($entity instanceof \ElggComment) {
        $form_vars['class'] = 'hidden';
    }
    
    if (!$entity instanceof \ElggComment && $latest_first && $comments_list && elgg_get_config('comment_box_collapses')) {
        $form_vars['class'] = 'hidden';
        
        $module_vars['menu'] = elgg_view_menu('comments', [
            'items' => [
                [
                    'name' => 'add',
                    'text' => elgg_echo('generic_comments:add'),
                    'href' => '#' . $form_vars['id'],
                    'icon' => 'plus',
                    'class' => ['elgg-button', 'elgg-button-action', 'elgg-toggle'],
                ],
            ],
        ]);
    }

    $form = elgg_view_form('comment/save', $form_vars, $vars);
} elseif (!elgg_is_logged_in() && $show_login_form) {
    $login_form_contents = elgg_view_form('login', [], ['returntoreferer' => true]);
    
    $login_form = elgg_view('output/longtext', [
        'value' => elgg_echo('generic_comment:login_required'),
    ]);
    
    $login_form .= elgg_view_module('dropdown', '', $login_form_contents, ['id' => 'comments-login']);

    $menu = elgg_view('output/url', [
        'href' => elgg_get_login_url([], '#comments-login'),
        'text' => elgg_echo('login'),
        'class' => ['elgg-button', 'elgg-button-action', 'elgg-popup'],
        'data-position' => json_encode([
            'my' => 'right top',
            'at' => 'right bottom',
        ]),
    ]);
    
    $form = elgg_view_message('notice', $login_form, [
        'menu' => $menu,
        'class' => 'mtl',
    ]);
}

if ($latest_first || $entity instanceof \ElggComment) {
    $content = $form . $content;
} else {
    $content .= $form;
}

if (empty($content)) {
    return;
}

echo elgg_view_module('comments', $module_title, $content, $module_vars);