get('/', function($format='html') use($app) {
$res = $app->response();
ob_start();
render('index', array(
'title' => 'IndiePost',
'meta' => ''
));
$html = ob_get_clean();
$res->body($html);
});
$app->get('/signin', function() use($app) {
$html = render('signin', array('title' => 'Sign In'));
$app->response()->body($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/
// Normlize the value now (move this into a function in IndieAuth\Client later)
if(!array_key_exists('me', $params) || !($me = normalizeMeURL($params['me']))) {
$html = render('auth_error', array(
'title' => 'Sign In',
'error' => 'Invalid "me" Parameter',
'errorDescription' => 'The ID you entered, ' . $params['me'] . ' is not valid.'
));
$app->response()->body($html);
return;
}
$authorizationEndpoint = IndieAuth\Client::discoverAuthorizationEndpoint($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(), clientID(), $state, $scope);
} else {
$authorizationURL = false;
}
// If the user has already signed in before and has a micropub access token, 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 && !array_key_exists('restart', $params)) {
$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->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 = normalizeMeURL($params['me']))) {
$html = render('auth_error', array(
'title' => 'Auth Callback',
'error' => 'Invalid "me" Parameter',
'errorDescription' => 'The ID you entered, ' . $params['me'] . ' is not valid.'
));
$app->response()->body($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(), clientID(), $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'] = $user->id();
}
unset($_SESSION['auth_state']);
if($redirectToDashboardImmediately) {
$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)
));
$app->response()->body($html);
}
});
$app->get('/signout', function() use($app) {
unset($_SESSION['auth']);
unset($_SESSION['me']);
unset($_SESSION['auth_state']);
unset($_SESSION['user_id']);
$app->redirect('/', 301);
});