$facebookClient = new FacebookProvider($database);
$accessToken = $facebookClient->exchangeCodeForAccessToken($headersHandler->getHeader('clientId'), $headersHandler->getHeader('redirectUri'), $headersHandler->getHeader('code'));
$facebookClient->setAccessToken($accessToken);
$facebookClient->extendAccessToken();
/*$facebookClient->retrieveAccessTokenFromRedirect();
$accessToken = $facebookClient->getAccessToken();*/
$userData = $facebookClient->getUserData();
$outputHandler->write("user data: ");
$outputHandler->write($userData);
$outputHandler->write("access token: ");
$outputHandler->write($accessToken);
if ($headersHandler->isAuthenticated()) {
// Link accounts if not linked previously and facebookID does not repeat
$user = new User($database, $headersHandler->getBearer());
$facebookClient->setUserID($user->getID());
if ($facebookClient->facebookIDRepeatsAmount() == 0) {
// FacebookID does not exist in the FB yet, can link
$facebookClient->save();
// update JWT
$user->fetchProviders();
$jwt = $user->getJWT();
$headersHandler->sendJSONData(['token' => $jwt]);
$outputHandler->write('linking successful');
$outputHandler->write($jwt);
} else {
// Duplicate id
$headersHandler->sendHeaderCode(401);
$headersHandler->sendJSONData(['error' => 'facebook id duplicate']);
$outputHandler->write("facebook id duplicate");
}
} else {
