} else {
// Duplicate id
$headersHandler->sendHeaderCode(401);
$headersHandler->sendJSONData(['error' => 'facebook id duplicate']);
$outputHandler->write("facebook id duplicate");
}
} else {
// Register and/or sign in
$facebookIDRepeats = $facebookClient->facebookIDRepeatsAmount();
if ($facebookIDRepeats == 0) {
// register
$user = new User($database);
$user->newUser($userData['email'], $userData['name'], md5($userData['email'] . rand(0, 100)));
$facebookClient->setUserID($user->getID());
$facebookClient->save();
$user->fetchProviders();
$jwt = $user->getJWT();
$headersHandler->sendJSONData(['token' => $jwt]);
$outputHandler->write('registered successfully');
$outputHandler->write($jwt);
} else {
if ($facebookIDRepeats == 1) {
// log in
$facebookClient->searchByFacebookID();
$facebookClient->setAccessToken($accessToken);
$facebookClient->save();
$user = new User($database);
$user->fetchUser($facebookClient->getUserID());
$jwt = $user->getJWT();
$headersHandler->sendJSONData(['token' => $jwt]);
$outputHandler->write('signed in successfully');
