Custom avatar

in vw I used this snippet, but it doesn’t work in v2, what is the new code?

add_filter(‘sd_detail_entry_author’, ‘sd_detail_entry_author_custom’);
function sd_detail_entry_author_custom() {
global $post, $preview;
if (!$preview) {
$author_id = $post->post_author;
$post_type = $post->post_type;
$entry_author = get_avatar(get_the_author_meta(’email’, $author_id), 100);
} else {
$user_id = get_current_user_id();
$post_type = $post->listing_type;
$entry_author = get_avatar(get_the_author_meta(’email’, $user_id), 100);
}

$post_id = $post->ID;

// WPML
$duplicate_of = geodir_is_wpml() ? get_post_meta((int)$post_id, ‘_icl_lang_duplicate_of’, true) : NULL;

if (!$preview && function_exists(‘geodir_load_translation_geodirclaim’)) {
$geodir_post_type = get_option(‘geodir_post_types_claim_listing’, array());

if (in_array($post_type, $geodir_post_type)) {
$is_owned = !$duplicate_of ? (int)geodir_get_post_meta($post_id, ‘claimed’, true) : (int)geodir_get_post_meta($duplicate_of, ‘claimed’, true);

if (!$is_owned) {
$entry_author = ‘‘;
}
}
}

return $entry_author;
}