body.php

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

// metadata (eg. menus)
$metadata = elgg_extract('metadata', $vars);
if (!isset($metadata)) {
    $metadata = elgg_view_menu('river', [
        'item' => $item,
        'prepare_dropdown' => true,
    ]);
    
    $object = $item->getObjectEntity();
    if ($object) {
        $metadata .= elgg_view_menu('social', [
            'entity' => $object,
            'item' => $item,
            'class' => 'elgg-menu-hz',
        ]);
    }
}

if (!empty($metadata)) {
    echo elgg_format_element('div', [
        'class' => 'elgg-river-metadata',
    ], $metadata);
}

// summary
$timestamp = elgg_view_friendly_time($item->getTimePosted());
if (!empty($timestamp)) {
    $timestamp = elgg_format_element('span', ['class' => 'elgg-river-timestamp'], $timestamp);
}

$summary = elgg_extract('summary', $vars);
if (!isset($summary)) {
    $summary = elgg_view('river/elements/summary', $vars);
}

if ($summary === false) {
    $subject = $item->getSubjectEntity();
    if ($subject instanceof ElggEntity) {
        $summary = elgg_view_entity_url($subject, ['class' => 'elgg-river-subject']);
    }
}

$summary = trim("$summary $timestamp");
if (!empty($summary)) {
    echo elgg_format_element('div', ['class' => 'elgg-river-summary'], $summary);
}

// message (eg excerpt)
$message = elgg_extract('message', $vars);
if (!empty($message)) {
    echo elgg_format_element('div', ['class' => 'elgg-river-message'], $message);
}

// attachments
$attachments = elgg_extract('attachments', $vars);
if (!empty($attachments)) {
    echo elgg_format_element('div', ['class' => 'elgg-river-attachments'], $attachments);
}

// responses (eg. comments)
$responses = elgg_view('river/elements/responses', $vars);
if (!empty($responses)) {
    echo elgg_format_element('div', ['class' => 'elgg-river-responses',], $responses);
}