_wp_ajax_delete_comment_response( int $comment_id, int $delta = -1 )

function _wp_ajax_delete_comment_response( $comment_id, $delta = -1 ) {
	$total    = isset( $_POST['_total'] )    ? (int) $_POST['_total']    : 0;
	$per_page = isset( $_POST['_per_page'] ) ? (int) $_POST['_per_page'] : 0;
	$page     = isset( $_POST['_page'] )     ? (int) $_POST['_page']     : 0;
	$url      = isset( $_POST['_url'] )      ? esc_url_raw( $_POST['_url'] ) : '';

	// JS didn't send us everything we need to know. Just die with success message
	if ( ! $total || ! $per_page || ! $page || ! $url ) {
		$time           = time();
		$comment        = get_comment( $comment_id );
		$comment_status = '';
		$comment_link   = '';

		if ( $comment ) {
			$comment_status = $comment->comment_approved;
		}

		if ( 1 === (int) $comment_status ) {
			$comment_link = get_comment_link( $comment );
		}

		$counts = wp_count_comments();

		$x = new WP_Ajax_Response( array(
			'what' => 'comment',
			// Here for completeness - not used.
			'id' => $comment_id,
			'supplemental' => array(
				'status' => $comment_status,
				'postId' => $comment ? $comment->comment_post_ID : '',
				'time' => $time,
				'in_moderation' => $counts->moderated,
				'i18n_comments_text' => sprintf(
					_n( '%s Comment', '%s Comments', $counts->approved ),
					number_format_i18n( $counts->approved )
				),
				'i18n_moderation_text' => sprintf(
					_nx( '%s in moderation', '%s in moderation', $counts->moderated, 'comments' ),
					number_format_i18n( $counts->moderated )
				),
				'comment_link' => $comment_link,
			)
		) );
		$x->send();
	}

	$total += $delta;
	if ( $total < 0 )
		$total = 0;

	// Only do the expensive stuff on a page-break, and about 1 other time per page
	if ( 0 == $total % $per_page || 1 == mt_rand( 1, $per_page ) ) {
		$post_id = 0;
		// What type of comment count are we looking for?
		$status = 'all';
		$parsed = parse_url( $url );
		if ( isset( $parsed['query'] ) ) {
			parse_str( $parsed['query'], $query_vars );
			if ( !empty( $query_vars['comment_status'] ) )
				$status = $query_vars['comment_status'];
			if ( !empty( $query_vars['p'] ) )
				$post_id = (int) $query_vars['p'];
			if ( ! empty( $query_vars['comment_type'] ) )
				$type = $query_vars['comment_type'];
		}

		if ( empty( $type ) ) {
			// Only use the comment count if not filtering by a comment_type.
			$comment_count = wp_count_comments($post_id);

			// We're looking for a known type of comment count.
			if ( isset( $comment_count->$status ) ) {
				$total = $comment_count->$status;
			}
		}
		// Else use the decremented value from above.
	}

	// The time since the last comment count.
	$time = time();
	$comment = get_comment( $comment_id );

	$x = new WP_Ajax_Response( array(
		'what' => 'comment',
		// Here for completeness - not used.
		'id' => $comment_id,
		'supplemental' => array(
			'status' => $comment ? $comment->comment_approved : '',
			'postId' => $comment ? $comment->comment_post_ID : '',
			'total_items_i18n' => sprintf( _n( '%s item', '%s items', $total ), number_format_i18n( $total ) ),
			'total_pages' => ceil( $total / $per_page ),
			'total_pages_i18n' => number_format_i18n( ceil( $total / $per_page ) ),
			'total' => $total,
			'time' => $time
		)
	) );
	$x->send();
}