gnu-social/plugins/TwitterBridge/twitterauthorization.php

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<?php
/**
* StatusNet, the distributed open-source microblogging tool
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*
* Class for doing OAuth authentication against Twitter
*
* PHP version 5
*
* LICENCE: This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
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* @category Plugin
* @package StatusNet
* @author Zach Copley <zach@status.net>
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* @author Julien C <chaumond@gmail.com>
* @copyright 2009-2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
if (!defined('STATUSNET') && !defined('LACONICA')) {
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exit(1);
}
require_once INSTALLDIR . '/plugins/TwitterBridge/twitter.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.
*
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* @category Plugin
* @package StatusNet
* @author Zach Copley <zach@status.net>
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* @author Julien C <chaumond@gmail.com>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
*
*/
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class TwitterauthorizationAction extends Action
{
var $twuid = null;
var $tw_fields = null;
var $access_token = null;
var $signin = null;
var $verifier = null;
/**
* Initialize class members. Looks for 'oauth_token' parameter.
*
* @param array $args misc. arguments
*
* @return boolean true
*/
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function prepare($args)
{
parent::prepare($args);
$this->signin = $this->boolean('signin');
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$this->oauth_token = $this->arg('oauth_token');
$this->verifier = $this->arg('oauth_verifier');
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return true;
}
/**
* Handler method
*
* @param array $args is ignored since it's now passed in in prepare()
*
* @return nothing
*/
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function handle($args)
{
parent::handle($args);
if (common_logged_in()) {
$user = common_current_user();
$flink = Foreign_link::getByUserID($user->id, TWITTER_SERVICE);
// If there's already a foreign link record and a foreign user
// it means the accounts are already linked, and this is unecessary.
// So go back.
if (isset($flink)) {
$fuser = $flink->getForeignUser();
if (!empty($fuser)) {
common_redirect(common_local_url('twittersettings'));
}
}
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}
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
// 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'));
$token = $this->trimmed('token');
if (!$token || $token != common_session_token()) {
$this->showForm(_m('There was a problem with your session token. Try again, please.'));
return;
}
if ($this->arg('create')) {
if (!$this->boolean('license')) {
$this->showForm(_m('You can\'t register if you don\'t agree to the license.'),
$this->trimmed('newname'));
return;
}
$this->createNewUser();
} else if ($this->arg('connect')) {
$this->connectNewUser();
} else {
common_debug('Twitter bridge - ' . print_r($this->args, true));
$this->showForm(_m('Something weird happened.'),
$this->trimmed('newname'));
}
} else {
// $this->oauth_token is only populated once Twitter authorizes our
// request token. If it's empty we're at the beginning of the auth
// process
if (empty($this->oauth_token)) {
$this->authorizeRequestToken();
} else {
$this->saveAccessToken();
}
}
}
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/**
* Asks Twitter for a request token, and then redirects to Twitter
* to authorize it.
*
* @return nothing
*/
function authorizeRequestToken()
{
try {
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// Get a new request token and authorize it
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$client = new TwitterOAuthClient();
$req_tok = $client->getRequestToken();
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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 = $client->getAuthorizeLink($req_tok, $this->signin);
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} catch (OAuthClientException $e) {
$msg = sprintf(
'OAuth client error - code: %1s, msg: %2s',
$e->getCode(),
$e->getMessage()
);
common_log(LOG_INFO, 'Twitter bridge - ' . $msg);
$this->serverError(
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_m('Couldn\'t link your Twitter account.')
);
}
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common_redirect($auth_link);
}
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/**
* Called when Twitter returns an authorized request token. Exchanges
* it for an access token and stores it.
*
* @return nothing
*/
function saveAccessToken()
{
// 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) {
$this->serverError(
_m('Couldn\'t link your Twitter account: oauth_token mismatch.')
);
}
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$twitter_user = null;
try {
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$client = new TwitterOAuthClient($_SESSION['twitter_request_token'],
$_SESSION['twitter_request_token_secret']);
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// Exchange the request token for an access token
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$atok = $client->getAccessToken($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);
$this->serverError(
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_m('Couldn\'t link your Twitter account.')
);
}
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if (common_logged_in()) {
// Save the access token and Twitter user info
$user = common_current_user();
$this->saveForeignLink($user->id, $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;
$this->tryLogin();
}
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// Clean up the the mess we made in the session
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unset($_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 $token the access token to save
*
* @return nothing
*/
function saveForeignLink($user_id, $twuid, $access_token)
{
$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 = $creds;
$flink->created = common_sql_now();
// Defaults: noticesync on, everything else off
$flink->set_flags(true, false, false, false);
$flink_id = $flink->insert();
if (empty($flink_id)) {
common_log_db_error($flink, 'INSERT', __FILE__);
$this->serverError(_m('Couldn\'t link your Twitter account.'));
}
return $flink_id;
}
function showPageNotice()
{
if ($this->error) {
$this->element('div', array('class' => 'error'), $this->error);
} else {
$this->element('div', 'instructions',
sprintf(_m('This is the first time you\'ve logged into %s so we must connect your Twitter account to a local account. You can either create a new account, or connect with your existing account, if you have one.'), common_config('site', 'name')));
}
}
function title()
{
return _m('Twitter Account Setup');
}
function showForm($error=null, $username=null)
{
$this->error = $error;
$this->username = $username;
$this->showPage();
}
function showPage()
{
parent::showPage();
}
/**
* @fixme much of this duplicates core code, which is very fragile.
* Should probably be replaced with an extensible mini version of
* the core registration form.
*/
function showContent()
{
if (!empty($this->message_text)) {
$this->element('p', null, $this->message);
return;
}
$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'));
$this->element('legend', null, _m('Connection options'));
$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'));
$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->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->elementStart('fieldset');
$this->hidden('token', common_session_token());
$this->element('legend', null,
_m('Create new account'));
$this->element('p', null,
_m('Create a new user with this nickname.'));
$this->elementStart('ul', 'form_data');
$this->elementStart('li');
$this->input('newname', _m('New nickname'),
($this->username) ? $this->username : '',
_m('1-64 lowercase letters or numbers, no punctuation or spaces'));
$this->elementEnd('li');
$this->elementEnd('ul');
$this->submit('create', _m('Create'));
$this->elementEnd('fieldset');
$this->elementStart('fieldset');
$this->element('legend', null,
_m('Connect existing account'));
$this->element('p', null,
_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');
$this->input('nickname', _m('Existing nickname'));
$this->elementEnd('li');
$this->elementStart('li');
$this->password('password', _m('Password'));
$this->elementEnd('li');
$this->elementEnd('ul');
$this->submit('connect', _m('Connect'));
$this->elementEnd('fieldset');
$this->elementEnd('fieldset');
$this->elementEnd('form');
}
function message($msg)
{
$this->message_text = $msg;
$this->showPage();
}
function createNewUser()
{
if (!Event::handle('StartRegistrationTry', array($this))) {
return;
}
if (common_config('site', 'closed')) {
$this->clientError(_m('Registration not allowed.'));
return;
}
$invite = null;
if (common_config('site', 'inviteonly')) {
$code = $_SESSION['invitecode'];
if (empty($code)) {
$this->clientError(_m('Registration not allowed.'));
return;
}
$invite = Invitation::staticGet($code);
if (empty($invite)) {
$this->clientError(_m('Not a valid invitation code.'));
return;
}
}
try {
$nickname = Nickname::normalize($this->trimmed('newname'));
} catch (NicknameException $e) {
$this->showForm($e->getMessage());
return;
}
if (!User::allowed_nickname($nickname)) {
$this->showForm(_m('Nickname not allowed.'));
return;
}
if (User::staticGet('nickname', $nickname)) {
$this->showForm(_m('Nickname already in use. Try another one.'));
return;
}
$fullname = trim($this->tw_fields['fullname']);
$args = array('nickname' => $nickname, 'fullname' => $fullname);
if (!empty($invite)) {
$args['code'] = $invite->code;
}
$user = User::register($args);
if (empty($user)) {
$this->serverError(_m('Error registering user.'));
return;
}
$result = $this->saveForeignLink($user->id,
$this->twuid,
$this->access_token);
save_twitter_user($this->twuid, $this->tw_fields['screen_name']);
if (!$result) {
$this->serverError(_m('Error connecting user to Twitter.'));
return;
}
common_set_user($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);
}
function connectNewUser()
{
$nickname = $this->trimmed('nickname');
$password = $this->trimmed('password');
if (!common_check_user($nickname, $password)) {
$this->showForm(_m('Invalid username or password.'));
return;
}
$user = User::staticGet('nickname', $nickname);
if (!empty($user)) {
common_debug('TwitterBridge Plugin - ' .
"Legit user to connect to Twitter: $nickname");
}
$result = $this->saveForeignLink($user->id,
$this->twuid,
$this->access_token);
save_twitter_user($this->twuid, $this->tw_fields['screen_name']);
if (!$result) {
$this->serverError(_m('Error connecting user to Twitter.'));
return;
}
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);
}
function connectUser()
{
$user = common_current_user();
$result = $this->flinkUser($user->id, $this->twuid);
if (empty($result)) {
$this->serverError(_m('Error connecting user to Twitter.'));
return;
}
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);
}
function tryLogin()
{
common_debug('TwitterBridge Plugin - ' .
"Trying login for Twitter user $this->twuid.");
$flink = Foreign_link::getByForeignID($this->twuid,
TWITTER_SERVICE);
if (!empty($flink)) {
$user = $flink->getUser();
if (!empty($user)) {
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);
}
} else {
common_debug('TwitterBridge Plugin - ' .
"No flink found for twuid: $this->twuid - new user");
$this->showForm(null, $this->bestNewNickname());
}
}
function goHome($nickname)
{
$url = common_get_returnto();
if ($url) {
// We don't have to return to it again
common_set_returnto(null);
} else {
$url = common_local_url('all',
array('nickname' =>
$nickname));
}
common_redirect($url, 303);
}
function bestNewNickname()
{
if (!empty($this->tw_fields['fullname'])) {
$nickname = $this->nicknamize($this->tw_fields['fullname']);
if ($this->isNewNickname($nickname)) {
return $nickname;
}
}
return null;
}
// Given a string, try to make it work as a nickname
function nicknamize($str)
{
$str = preg_replace('/\W/', '', $str);
$str = str_replace(array('-', '_'), '', $str);
return strtolower($str);
}
function isNewNickname($str)
{
if (!Nickname::isValid($str)) {
return false;
}
if (!User::allowed_nickname($str)) {
return false;
}
if (User::staticGet('nickname', $str)) {
return false;
}
return true;
}
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}