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<?php
function buildRedirectURI() {
return Config::$base_url . 'auth/callback';
}
function build_url($parsed_url) {
$scheme = isset($parsed_url['scheme']) ? $parsed_url['scheme'] . '://' : '';
$host = isset($parsed_url['host']) ? $parsed_url['host'] : '';
$port = isset($parsed_url['port']) ? ':' . $parsed_url['port'] : '';
$user = isset($parsed_url['user']) ? $parsed_url['user'] : '';
$pass = isset($parsed_url['pass']) ? ':' . $parsed_url['pass'] : '';
$pass = ($user || $pass) ? "$pass@" : '';
$path = isset($parsed_url['path']) ? $parsed_url['path'] : '';
$query = isset($parsed_url['query']) ? '?' . $parsed_url['query'] : '';
$fragment = isset($parsed_url['fragment']) ? '#' . $parsed_url['fragment'] : '';
return "$scheme$user$pass$host$port$path$query$fragment";
}
$app->get('/', function($format='html') use($app) {
$res = $app->response();
ob_start();
render('index', array(
'title' => 'Quill',
'meta' => '',
'authorizing' => false
));
$html = ob_get_clean();
$res->body($html);
});
$app->get('/auth/start', function() use($app) {
$req = $app->request();
$params = $req->params();
// the "me" parameter is user input, and may be in a couple of different forms:
// aaronparecki.com http://aaronparecki.com http://aaronparecki.com/
if(!array_key_exists('me', $params) || !($me = IndieAuth\Client::normalizeMeURL($params['me']))) {
$html = render('auth_error', array(
'title' => 'Sign In',
'error' => 'Invalid "me" Parameter',
'errorDescription' => 'The URL you entered, "<strong>' . $params['me'] . '</strong>" is not valid.'
));
$app->response()->body($html);
return;
}
if(k($params, 'redirect')) {
$_SESSION['redirect_after_login'] = $params['redirect'];
}
$authorizationEndpoint = IndieAuth\Client::discoverAuthorizationEndpoint($me);
$tokenEndpoint = IndieAuth\Client::discoverTokenEndpoint($me);
$micropubEndpoint = IndieAuth\Client::discoverMicropubEndpoint($me);
if($tokenEndpoint && $micropubEndpoint && $authorizationEndpoint) {
// Generate a "state" parameter for the request
$state = IndieAuth\Client::generateStateParameter();
$_SESSION['auth_state'] = $state;
$scope = 'post';
$authorizationURL = IndieAuth\Client::buildAuthorizationURL($authorizationEndpoint, $me, buildRedirectURI(), Config::$base_url, $state, $scope);
} else {
$authorizationURL = false;
}
// If the user has already signed in before and has a micropub access token,
// and the endpoints are all the same, skip the debugging screens and redirect
// immediately to the auth endpoint.
// This will still generate a new access token when they finish logging in.
$user = ORM::for_table('users')->where('url', $me)->find_one();
if($user && $user->micropub_access_token
&& $user->micropub_endpoint == $micropubEndpoint
&& $user->token_endpoint == $tokenEndpoint
&& $user->authorization_endpoint == $authorizationEndpoint
&& !array_key_exists('restart', $params)) {
// TODO: fix this by caching the endpoints maybe in the session instead of writing them to the DB here.
// Then remove the line below that blanks out the access token
$user->micropub_endpoint = $micropubEndpoint;
$user->authorization_endpoint = $authorizationEndpoint;
$user->token_endpoint = $tokenEndpoint;
$user->save();
$app->redirect($authorizationURL, 301);
} else {
if(!$user)
$user = ORM::for_table('users')->create();
$user->url = $me;
$user->date_created = date('Y-m-d H:i:s');
$user->micropub_endpoint = $micropubEndpoint;
$user->authorization_endpoint = $authorizationEndpoint;
$user->token_endpoint = $tokenEndpoint;
$user->micropub_access_token = ''; // blank out the access token if they attempt to sign in again
$user->save();
$html = render('auth_start', array(
'title' => 'Sign In',
'me' => $me,
'authorizing' => $me,
'meParts' => parse_url($me),
'tokenEndpoint' => $tokenEndpoint,
'micropubEndpoint' => $micropubEndpoint,
'authorizationEndpoint' => $authorizationEndpoint,
'authorizationURL' => $authorizationURL
));
$app->response()->body($html);
}
});
$app->get('/auth/callback', function() use($app) {
$req = $app->request();
$params = $req->params();
// Double check there is a "me" parameter
// Should only fail for really hacked up requests
if(!array_key_exists('me', $params) || !($me = IndieAuth\Client::normalizeMeURL($params['me']))) {
if(array_key_exists('me', $params))
$error = 'The ID you entered, <strong>' . $params['me'] . '</strong> is not valid.';
else
$error = 'There was no "me" parameter in the callback.';
$html = render('auth_error', array(
'title' => 'Auth Callback',
'error' => 'Invalid "me" Parameter',
'errorDescription' => $error
));
$app->response()->body($html);
return;
}
// If there is no state in the session, start the login again
if(!array_key_exists('auth_state', $_SESSION)) {
$app->redirect('/auth/start?me='.urlencode($params['me']));
return;
}
if(!array_key_exists('code', $params) || trim($params['code']) == '') {
$html = render('auth_error', array(
'title' => 'Auth Callback',
'error' => 'Missing authorization code',
'errorDescription' => 'No authorization code was provided in the request.'
));
$app->response()->body($html);
return;
}
// Verify the state came back and matches what we set in the session
// Should only fail for malicious attempts, ok to show a not as nice error message
if(!array_key_exists('state', $params)) {
$html = render('auth_error', array(
'title' => 'Auth Callback',
'error' => 'Missing state parameter',
'errorDescription' => 'No state parameter was provided in the request. This shouldn\'t happen. It is possible this is a malicious authorization attempt.'
));
$app->response()->body($html);
return;
}
if($params['state'] != $_SESSION['auth_state']) {
$html = render('auth_error', array(
'title' => 'Auth Callback',
'error' => 'Invalid state',
'errorDescription' => 'The state parameter provided did not match the state provided at the start of authorization. This is most likely caused by a malicious authorization attempt.'
));
$app->response()->body($html);
return;
}
// Now the basic sanity checks have passed. Time to start providing more helpful messages when there is an error.
// An authorization code is in the query string, and we want to exchange that for an access token at the token endpoint.
// Discover the endpoints
$micropubEndpoint = IndieAuth\Client::discoverMicropubEndpoint($me);
$tokenEndpoint = IndieAuth\Client::discoverTokenEndpoint($me);
if($tokenEndpoint) {
$token = IndieAuth\Client::getAccessToken($tokenEndpoint, $params['code'], $params['me'], buildRedirectURI(), Config::$base_url, k($params,'state'), true);
} else {
$token = array('auth'=>false, 'response'=>false);
}
$redirectToDashboardImmediately = false;
// If a valid access token was returned, store the token info in the session and they are signed in
if(k($token['auth'], array('me','access_token','scope'))) {
$_SESSION['auth'] = $token['auth'];
$_SESSION['me'] = $params['me'];
$user = ORM::for_table('users')->where('url', $me)->find_one();
if($user) {
// Already logged in, update the last login date
$user->last_login = date('Y-m-d H:i:s');
// If they have logged in before and we already have an access token, then redirect to the dashboard now
if($user->micropub_access_token)
$redirectToDashboardImmediately = true;
} else {
// New user! Store the user in the database
$user = ORM::for_table('users')->create();
$user->url = $me;
$user->date_created = date('Y-m-d H:i:s');
}
$user->micropub_endpoint = $micropubEndpoint;
$user->micropub_access_token = $token['auth']['access_token'];
$user->micropub_scope = $token['auth']['scope'];
$user->micropub_response = $token['response'];
$user->save();
$_SESSION['user_id'] = $user->id();
// Make a request to the micropub endpoint to discover the syndication targets and media endpoint if any.
// Errors are silently ignored here. The user will be able to retry from the new post interface and get feedback.
get_micropub_config($user);
}
unset($_SESSION['auth_state']);
if($redirectToDashboardImmediately) {
if(k($_SESSION, 'redirect_after_login')) {
$dest = $_SESSION['redirect_after_login'];
unset($_SESSION['redirect_after_login']);
$app->redirect($dest, 301);
} else {
$app->redirect('/new', 301);
}
} else {
$html = render('auth_callback', array(
'title' => 'Sign In',
'me' => $me,
'authorizing' => $me,
'meParts' => parse_url($me),
'tokenEndpoint' => $tokenEndpoint,
'auth' => $token['auth'],
'response' => $token['response'],
'curl_error' => (array_key_exists('error', $token) ? $token['error'] : false),
'destination' => (k($_SESSION, 'redirect_after_login') ?: '/new')
));
$app->response()->body($html);
}
});
$app->get('/signout', function() use($app) {
unset($_SESSION['auth']);
unset($_SESSION['me']);
unset($_SESSION['auth_state']);
unset($_SESSION['user_id']);
$app->redirect('/', 301);
});
/*
$app->post('/auth/facebook', function() use($app) {
if($user=require_login($app, false)) {
$params = $app->request()->params();
// User just auth'd with facebook, store the access token
$user->facebook_access_token = $params['fb_token'];
$user->save();
$app->response()->body(json_encode(array(
'result' => 'ok'
)));
} else {
$app->response()->body(json_encode(array(
'result' => 'error'
)));
}
});
*/
$app->post('/auth/twitter', function() use($app) {
if($user=require_login($app, false)) {
$params = $app->request()->params();
// User just auth'd with twitter, store the access token
$user->twitter_access_token = $params['twitter_token'];
$user->twitter_token_secret = $params['twitter_secret'];
$user->save();
$app->response()['Content-type'] = 'application/json';
$app->response()->body(json_encode(array(
'result' => 'ok'
)));
} else {
$app->response()['Content-type'] = 'application/json';
$app->response()->body(json_encode(array(
'result' => 'error'
)));
}
});
function getTwitterLoginURL(&$twitter) {
$request_token = $twitter->getRequestToken(Config::$base_url . 'auth/twitter/callback');
$_SESSION['twitter_auth'] = $request_token;
return $twitter->getAuthorizeURL($request_token['oauth_token']);
}
$app->get('/auth/twitter', function() use($app) {
$params = $app->request()->params();
if($user=require_login($app, false)) {
// If there is an existing Twitter token, check if it is valid
// Otherwise, generate a Twitter login link
$twitter_login_url = false;
$twitter = new \TwitterOAuth\Api(Config::$twitterClientID, Config::$twitterClientSecret,
$user->twitter_access_token, $user->twitter_token_secret);
if(array_key_exists('login', $params)) {
$twitter = new \TwitterOAuth\Api(Config::$twitterClientID, Config::$twitterClientSecret);
$twitter_login_url = getTwitterLoginURL($twitter);
} else {
if($user->twitter_access_token) {
if ($twitter->get('account/verify_credentials')) {
$app->response()['Content-type'] = 'application/json';
$app->response()->body(json_encode(array(
'result' => 'ok'
)));
return;
} else {
// If the existing twitter token is not valid, generate a login link
$twitter_login_url = getTwitterLoginURL($twitter);
}
} else {
$twitter_login_url = getTwitterLoginURL($twitter);
}
}
$app->response()['Content-type'] = 'application/json';
$app->response()->body(json_encode(array(
'url' => $twitter_login_url
)));
} else {
$app->response()['Content-type'] = 'application/json';
$app->response()->body(json_encode(array(
'result' => 'error'
)));
}
});
$app->get('/auth/twitter/callback', function() use($app) {
if($user=require_login($app)) {
$params = $app->request()->params();
$twitter = new \TwitterOAuth\Api(Config::$twitterClientID, Config::$twitterClientSecret,
$_SESSION['twitter_auth']['oauth_token'], $_SESSION['twitter_auth']['oauth_token_secret']);
$credentials = $twitter->getAccessToken($params['oauth_verifier']);
$user->twitter_access_token = $credentials['oauth_token'];
$user->twitter_token_secret = $credentials['oauth_token_secret'];
$user->twitter_username = $credentials['screen_name'];
$user->save();
$app->redirect('/settings');
}
});
$app->get('/auth/instagram', function() use($app) {
if($user=require_login($app, false)) {
$instagram = instagram_client();
// If there is an existing Instagram auth token, check if it's valid
if($user->instagram_access_token) {
$instagram->setAccessToken($user->instagram_access_token);
$igUser = $instagram->getUser();
if($igUser && $igUser->meta->code == 200) {
$app->response()['Content-type'] = 'application/json';
$app->response()->body(json_encode(array(
'result' => 'ok',
'username' => $igUser->data->username,
'url' => $instagram->getLoginUrl(array('basic','likes'))
)));
return;
}
}
$app->response()['Content-type'] = 'application/json';
$app->response()->body(json_encode(array(
'result' => 'error',
'url' => $instagram->getLoginUrl(array('basic','likes'))
)));
}
});
$app->get('/auth/instagram/callback', function() use($app) {
if($user=require_login($app)) {
$params = $app->request()->params();
$instagram = instagram_client();
$data = $instagram->getOAuthToken($params['code']);
$user->instagram_access_token = $data->access_token;
$user->save();
$app->redirect('/settings');
}
});