bluesky-handles/index.php

<?php
$config = include 'config/local.config.php';
if (empty($config['config']['hostname'])) {
	notFound();
}

$connection = connectDatabase($config);
if (empty($connection)) {
	notFound();
}

if (!in_array($_REQUEST['pagename'], ['.well-known/atproto-did', ''])) {
	notFound();
}

$server = '.' . trim($config['config']['hostname'], '.');

if (!strpos($_SERVER['SERVER_NAME'], $server)) {
	notFound();
}

$nick = str_replace($server, '', $_SERVER['SERVER_NAME']);

$user = selectFirst($connection, "SELECT `uid` FROM `user` WHERE `nickname` = ?", [$nick]);
if (empty($user['uid'])) {
	notFound();
}

if ($_REQUEST['pagename'] == '') {
	header('Location: http://' . $config['config']['hostname'] . '/profile/' . $nick);
	die();
}	

$enabled = selectFirst($connection, "SELECT `v` FROM `pconfig` WHERE `uid` = ? AND `cat` = ? AND `k` = ?", [$user['uid'], 'bluesky', 'friendica_handle']);
if (empty($enabled['v'])) {
	notFound();
}

$did = selectFirst($connection, "SELECT `v` FROM `pconfig` WHERE `uid` = ? AND `cat` = ? AND `k` = ?", [$user['uid'], 'bluesky', 'did']);
if (empty($did['v'])) {
	notFound();
}

header('Content-Type: text/plain');
echo $did['v'];

function notFound()
{
	header('HTTP/1.0 404 Not Found');

	echo '<h1>404 - Page Not Found</h1>';
	echo 'The requested resource could not be found but may be available in the future.';
	die();
}

function connectDatabase(array $config): PDO
{
	if (!empty($config['database']['socket'])) {
		$connect = 'mysql:unix_socket=' . $config['database']['socket'];
	} else {
		$connect = 'mysql:host=' . $config['database']['hostname'];
		if (!empty($config['database']['port'])) {
			$connect .= ';port=' . $config['database']['port'];
		}
	}

	if (!empty($config['database']['charset'])) {
		$connect .= ';charset=' . $config['database']['charset'];
	}

	$connect .= ';dbname=' . $config['database']['database'];

	try {
		$connection = @new PDO($connect, $config['database']['username'], $config['database']['password'], [PDO::ATTR_PERSISTENT => false]);
		$connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT);
	} catch (PDOException $e) {
		$connection = null;
	}
	return $connection;
}

function selectFirst(PDO $connection, $query, $parameters = []): ?array
{
	if (!$stmt = $connection->prepare($query)) {
		return null;
	}

	foreach (array_keys($parameters) as $param) {
		$data_type = PDO::PARAM_STR;
		if (is_int($parameters[$param])) {
			$data_type = PDO::PARAM_INT;
		} elseif ($parameters[$param] !== null) {
			$parameters[$param] = (string)$parameters[$param];
		}

		$stmt->bindParam($param + 1, $parameters[$param], $data_type);
	}

	if (!$stmt->execute()) {
		return null;
	}

	$columns = $stmt->fetch(PDO::FETCH_ASSOC);
	$stmt->closeCursor();

	if (!is_array($columns)) {
		return null;
	}

	return $columns;
}
?>