gnu-social/plugins/TwitterBridge/actions/twitterauthorization.php

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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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/**
* Class for doing OAuth authentication against Twitter
*
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* @category Plugin
* @package GNUsocial
* @author Zach Copley <zach@status.net>
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* @author Julien C <chaumond@gmail.com>
* @copyright 2009-2010 StatusNet, Inc.
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
defined('GNUSOCIAL') || die();
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require_once dirname(__DIR__) . '/twitter.php';
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require_once INSTALLDIR . '/lib/util/oauthclient.php';
/**
* Class for doing OAuth authentication against Twitter
*
* Peforms the OAuth "dance" between StatusNet and Twitter -- requests a token,
* authorizes it, and exchanges it for an access token. It also creates a link
* (Foreign_link) between the StatusNet user and Twitter user and stores the
* access token and secret in the link.
*
* @category Plugin
* @package GNUsocial
* @author Zach Copley <zach@status.net>
* @author Julien C <chaumond@gmail.com>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class TwitterauthorizationAction extends FormAction
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{
public $twuid = null;
public $tw_fields = null;
public $access_token = null;
public $verifier = null;
protected $needLogin = false; // authorization page can also be used to create a new user
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protected function doPreparation()
{
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$this->oauth_token = $this->arg('oauth_token');
$this->verifier = $this->arg('oauth_verifier');
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if ($this->scoped instanceof Profile) {
try {
$flink = Foreign_link::getByUserID($this->scoped->getID(), TWITTER_SERVICE);
$fuser = $flink->getForeignUser();
// If there's already a foreign link record and a foreign user
// (no exceptions were thrown when fetching either of them...)
// it means the accounts are already linked, and this is unecessary.
// So go back.
common_redirect(common_local_url('twittersettings'));
} catch (NoResultException $e) {
// but if we don't have a foreign user linked, let's continue authorization procedure.
}
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}
}
protected function doPost()
{
// User was not logged in to StatusNet before
$this->twuid = $this->trimmed('twuid');
$this->tw_fields = array('screen_name' => $this->trimmed('tw_fields_screen_name'),
'fullname' => $this->trimmed('tw_fields_fullname'));
$this->access_token = new OAuthToken($this->trimmed('access_token_key'), $this->trimmed('access_token_secret'));
if ($this->arg('create')) {
common_debug('TwitterBridgeDebug - POST with create');
if (!$this->boolean('license')) {
// TRANS: Form validation error displayed when the checkbox to agree to the license has not been checked.
throw new ClientException(_m('You cannot register if you do not agree to the license.'));
}
$this->createNewUser();
} elseif ($this->arg('connect')) {
common_debug('TwitterBridgeDebug - POST with connect');
$this->connectNewUser();
} else {
common_debug('TwitterBridgeDebug - ' . print_r($this->args, true));
// TRANS: Form validation error displayed when an unhandled error occurs.
throw new ClientException(_m('No known action for POST.'));
}
}
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/**
* Asks Twitter for a request token, and then redirects to Twitter
* to authorize it.
*/
protected function authorizeRequestToken()
{
try {
// Get a new request token and authorize it
$client = new TwitterOAuthClient();
$req_tok = $client->getTwitterRequestToken();
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// Sock the request token away in the session temporarily
$_SESSION['twitter_request_token'] = $req_tok->key;
$_SESSION['twitter_request_token_secret'] = $req_tok->secret;
$auth_link = $client->getTwitterAuthorizeLink($req_tok, $this->boolean('signin'));
} catch (OAuthClientException $e) {
$msg = sprintf(
'OAuth client error - code: %1s, msg: %2s',
$e->getCode(),
$e->getMessage()
);
common_log(LOG_INFO, 'Twitter bridge - ' . $msg);
// TRANS: Server error displayed when linking to a Twitter account fails.
throw new ServerException(_m('Could not link your Twitter account.'));
}
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common_redirect($auth_link);
}
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/**
* Called when Twitter returns an authorized request token. Exchanges
* it for an access token and stores it.
*
* @return void
*/
private function saveAccessToken(): void
{
// Check to make sure Twitter returned the same request
// token we sent them
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if ($_SESSION['twitter_request_token'] != $this->oauth_token) {
// TRANS: Server error displayed when linking to a Twitter account fails because of an incorrect oauth_token.
throw new ServerException(_m('Could not link your Twitter account: oauth_token mismatch.'));
}
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$twitter_user = null;
try {
$client = new TwitterOAuthClient($_SESSION['twitter_request_token'], $_SESSION['twitter_request_token_secret']);
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// Exchange the request token for an access token
$atok = $client->getTwitterAccessToken($this->verifier);
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// Test the access token and get the user's Twitter info
$client = new TwitterOAuthClient($atok->key, $atok->secret);
$twitter_user = $client->verifyCredentials();
} catch (OAuthClientException $e) {
$msg = sprintf(
'OAuth client error - code: %1$s, msg: %2$s',
$e->getCode(),
$e->getMessage()
);
common_log(LOG_INFO, 'Twitter bridge - ' . $msg);
// TRANS: Server error displayed when linking to a Twitter account fails.
throw new ServerException(_m('Could not link your Twitter account.'));
}
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if ($this->scoped instanceof Profile) {
// Save the access token and Twitter user info
$this->saveForeignLink($this->scoped->getID(), $twitter_user->id, $atok);
save_twitter_user($twitter_user->id, $twitter_user->screen_name);
} else {
$this->twuid = $twitter_user->id;
$this->tw_fields = array("screen_name" => $twitter_user->screen_name,
"fullname" => $twitter_user->name);
$this->access_token = $atok;
$this->tryLogin();
return;
}
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// Clean up the the mess we made in the session
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unset($_SESSION['twitter_request_token']);
unset($_SESSION['twitter_request_token_secret']);
if (common_logged_in()) {
common_redirect(common_local_url('twittersettings'));
}
}
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/**
* Saves a Foreign_link between Twitter user and local user,
* which includes the access token and secret.
*
* @param int $user_id StatusNet user ID
* @param int $twuid Twitter user ID
* @param OAuthToken $token the access token to save
*
* @return void
*/
private function saveForeignLink(
int $user_id,
int $twuid,
OAuthToken $access_token
): void {
$flink = new Foreign_link();
$flink->user_id = $user_id;
$flink->service = TWITTER_SERVICE;
// delete stale flink, if any
$result = $flink->find(true);
if (!empty($result)) {
$flink->safeDelete();
}
$flink->user_id = $user_id;
$flink->foreign_id = $twuid;
$flink->service = TWITTER_SERVICE;
$creds = TwitterOAuthClient::packToken($access_token);
$flink->credentials = DB_DataObject_Cast::blob($creds);
$flink->created = common_sql_now();
// Defaults: noticesync on, everything else off
$flink->set_flags(true, false, false, false, false);
$flink_id = $flink->insert();
// We want to make sure we got a numerical >0 value, not just failed the insert (which would be === false)
if (empty($flink_id)) {
common_log_db_error($flink, 'INSERT', __FILE__);
// TRANS: Server error displayed when linking to a Twitter account fails.
throw new ServerException(_m('Could not link your Twitter account.'));
}
}
public function getInstructions()
{
// TRANS: Page instruction. %s is the StatusNet sitename.
return sprintf(_m('This is the first time you have logged into %s so we must connect your Twitter account to a local account. You can either create a new account, or connect with your existing account, if you have one.'), common_config('site', 'name'));
}
public function title()
{
// TRANS: Page title.
return _m('Twitter Account Setup');
}
public function showPage()
{
// $this->oauth_token is only populated once Twitter authorizes our
// request token. If it's empty we're at the beginning of the auth
// process
if (empty($this->error)) {
if (empty($this->oauth_token)) {
// authorizeRequestToken either throws an exception or redirects
$this->authorizeRequestToken();
} else {
$this->saveAccessToken();
}
}
parent::showPage();
}
/**
* @fixme much of this duplicates core code, which is very fragile.
* Should probably be replaced with an extensible mini version of
* the core registration form.
*/
public function showContent()
{
$this->elementStart('form', array('method' => 'post',
'id' => 'form_settings_twitter_connect',
'class' => 'form_settings',
'action' => common_local_url('twitterauthorization')));
$this->elementStart('fieldset', array('id' => 'settings_twitter_connect_options'));
// TRANS: Fieldset legend.
$this->element('legend', null, _m('Connection options'));
$this->hidden('access_token_key', $this->access_token->key);
$this->hidden('access_token_secret', $this->access_token->secret);
$this->hidden('twuid', $this->twuid);
$this->hidden('tw_fields_screen_name', $this->tw_fields['screen_name']);
$this->hidden('tw_fields_name', $this->tw_fields['fullname']);
$this->hidden('token', common_session_token());
// Only allow new account creation if site is not flagged invite-only
if (!common_config('site', 'inviteonly')) {
$this->elementStart('fieldset');
$this->element(
'legend',
null,
// TRANS: Fieldset legend.
_m('Create new account')
);
$this->element(
'p',
null,
// TRANS: Sub form introduction text.
_m('Create a new user with this nickname.')
);
$this->elementStart('ul', 'form_data');
// Hook point for captcha etc
Event::handle('StartRegistrationFormData', array($this));
$this->elementStart('li');
// TRANS: Field label.
$this->input(
'newname',
_m('New nickname'),
$this->username ?: '',
// TRANS: Field title for nickname field.
_m('1-64 lowercase letters or numbers, no punctuation or spaces.')
);
$this->elementEnd('li');
$this->elementStart('li');
// TRANS: Field label.
$this->input(
'email',
_m('LABEL', 'Email'),
$this->getEmail(),
// TRANS: Field title for e-mail address field.
_m('Used only for updates, announcements, and password recovery')
);
$this->elementEnd('li');
// Hook point for captcha etc
Event::handle('EndRegistrationFormData', array($this));
$this->elementEnd('ul');
// TRANS: Button text for creating a new StatusNet account in the Twitter connect page.
$this->submit('create', _m('BUTTON', 'Create'));
$this->elementEnd('fieldset');
}
$this->elementStart('fieldset');
$this->element(
'legend',
null,
// TRANS: Fieldset legend.
_m('Connect existing account')
);
$this->element(
'p',
null,
// TRANS: Sub form introduction text.
_m('If you already have an account, login with your username and password to connect it to your Twitter account.')
);
$this->elementStart('ul', 'form_data');
$this->elementStart('li');
// TRANS: Field label.
$this->input('nickname', _m('Existing nickname'));
$this->elementEnd('li');
$this->elementStart('li');
// TRANS: Field label.
$this->password('password', _m('Password'));
$this->elementEnd('li');
$this->elementEnd('ul');
$this->elementEnd('fieldset');
$this->elementStart('fieldset');
$this->element(
'legend',
null,
// TRANS: Fieldset legend.
_m('License')
);
$this->elementStart('ul', 'form_data');
$this->elementStart('li');
$this->element('input', array('type' => 'checkbox',
'id' => 'license',
'class' => 'checkbox',
'name' => 'license',
'value' => 'true'));
$this->elementStart('label', array('class' => 'checkbox', 'for' => 'license'));
// TRANS: Text for license agreement checkbox.
// TRANS: %s is the license as configured for the StatusNet site.
$message = _m('My text and files are available under %s ' .
'except this private data: password, ' .
'email address, IM address, and phone number.');
$link = '<a href="' .
htmlspecialchars(common_config('license', 'url')) .
'">' .
htmlspecialchars(common_config('license', 'title')) .
'</a>';
$this->raw(sprintf(htmlspecialchars($message), $link));
$this->elementEnd('label');
$this->elementEnd('li');
$this->elementEnd('ul');
$this->elementEnd('fieldset');
// TRANS: Button text for connecting an existing StatusNet account in the Twitter connect page..
$this->submit('connect', _m('BUTTON', 'Connect'));
$this->elementEnd('fieldset');
$this->elementEnd('form');
}
/**
* Get specified e-mail from the form, or the invite code.
*
* @return string
*/
private function getEmail(): string
{
$email = $this->trimmed('email');
if (!empty($email)) {
return $email;
}
// Terrible hack for invites...
if (common_config('site', 'inviteonly')) {
$code = $_SESSION['invitecode'];
if ($code) {
$invite = Invitation::getKV($code);
if ($invite && $invite->address_type == 'email') {
return $invite->address;
}
}
}
return '';
}
protected function createNewUser()
{
common_debug('TwitterBridgeDebug - createNewUser');
if (!Event::handle('StartRegistrationTry', array($this))) {
common_debug('TwitterBridgeDebug - StartRegistrationTry failed');
// TRANS: Client error displayed when trying to create a new user but a plugin aborted the process.
throw new ClientException(_m('Registration of new user was aborted, maybe you failed a captcha?'));
}
if (common_config('site', 'closed')) {
common_debug('TwitterBridgeDebug - site is closed for registrations');
// TRANS: Client error displayed when trying to create a new user while creating new users is not allowed.
throw new ClientException(_m('Registration not allowed.'));
}
$invite = null;
if (common_config('site', 'inviteonly')) {
common_debug('TwitterBridgeDebug - site is inviteonly');
$code = $_SESSION['invitecode'];
if (empty($code)) {
// TRANS: Client error displayed when trying to create a new user while creating new users is not allowed.
throw new ClientException(_m('Registration not allowed.'));
}
$invite = Invitation::getKV('code', $code);
if (!$invite instanceof Invite) {
common_debug('TwitterBridgeDebug - and we failed the invite code test');
// TRANS: Client error displayed when trying to create a new user with an invalid invitation code.
throw new ClientException(_m('Not a valid invitation code.'));
}
}
common_debug('TwitterBridgeDebug - trying our nickname: '.$this->trimmed('newname'));
// Nickname::normalize throws exception if the nickname is taken
$nickname = Nickname::normalize($this->trimmed('newname'), true);
$fullname = trim($this->tw_fields['fullname']);
$args = array('nickname' => $nickname, 'fullname' => $fullname);
if (!empty($invite)) {
$args['code'] = $invite->code;
}
$email = $this->getEmail();
if (!empty($email)) {
$args['email'] = $email;
}
common_debug(
'TwitterBridgeDebug - registering user with args:'
. var_export($args, true)
);
$user = User::register($args);
common_debug(
'TwitterBridgeDebug - registered the user and saving twitter user'
);
save_twitter_user($this->twuid, $this->tw_fields['screen_name']);
common_debug(
'TwitterBridgeDebug - saving foreign link after creating new '
. 'local user ' . $user->id
);
$this->saveForeignLink(
$user->id,
$this->twuid,
$this->access_token
);
common_set_user($user);
common_real_login(true);
common_debug('TwitterBridge Plugin - ' .
"Registered new user $user->id from Twitter user $this->twuid");
Event::handle('EndRegistrationTry', array($this));
common_redirect(common_local_url('showstream', array('nickname' => $user->nickname)), 303);
}
private function connectNewUser(): void
{
$nickname = $this->trimmed('nickname');
$password = $this->trimmed('password');
if (!common_check_user($nickname, $password)) {
// TRANS: Form validation error displayed when connecting an existing user to a Twitter user fails because
// TRANS: the provided username and/or password are incorrect.
throw new ClientException(_m('Invalid username or password.'));
}
$user = User::getKV('nickname', $nickname);
if ($user instanceof User) {
common_debug('TwitterBridge Plugin - ' .
"Legit user to connect to Twitter: $nickname");
}
// throws exception on failure
$this->saveForeignLink(
$user->id,
$this->twuid,
$this->access_token
);
save_twitter_user($this->twuid, $this->tw_fields['screen_name']);
common_debug('TwitterBridge Plugin - ' .
"Connected Twitter user $this->twuid to local user $user->id");
common_set_user($user);
common_real_login(true);
$this->goHome($user->nickname);
}
private function connectUser(): void
{
$user = common_current_user();
$result = $this->flinkUser($user->id, $this->twuid);
if (empty($result)) {
// TRANS: Server error displayed connecting a user to a Twitter user has failed.
$this->serverError(_m('Error connecting user to Twitter.'));
}
common_debug('TwitterBridge Plugin - ' .
"Connected Twitter user $this->twuid to local user $user->id");
// Return to Twitter connection settings tab
common_redirect(common_local_url('twittersettings'), 303);
}
protected function tryLogin()
{
common_debug('TwitterBridge Plugin - ' .
"Trying login for Twitter user $this->twuid.");
try {
$flink = Foreign_link::getByForeignID($this->twuid, TWITTER_SERVICE);
$user = $flink->getUser();
common_debug('TwitterBridge Plugin - ' .
"Logged in Twitter user $flink->foreign_id as user $user->id ($user->nickname)");
common_set_user($user);
common_real_login(true);
$this->goHome($user->nickname);
} catch (NoResultException $e) {
// Either no Foreign_link was found or not the user connected to it.
// Let's just continue to allow creating or logging in as a new user.
}
common_debug("TwitterBridge Plugin - No flink found for twuid: {$this->twuid} - new user");
// FIXME: what do we want to do here? I forgot
return;
throw new ServerException(_m('No foreign link found for Twitter user'));
}
private function goHome(string $nickname): void
{
$url = common_get_returnto();
if ($url) {
// We don't have to return to it again
common_set_returnto(null);
} else {
$url = common_local_url(
'all',
['nickname' => $nickname]
);
}
common_redirect($url, 303);
}
private function bestNewNickname(): ?string
{
try {
return Nickname::normalize($this->tw_fields['fullname'], true);
} catch (NicknameException $e) {
return null;
}
}
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}