gnu-social/plugins/FacebookBridge/actions/facebookfinishlogin.php

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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
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* Login or register a local user based on a Facebook user
*
* 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/>.
*
* @category Plugin
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @copyright 2010 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
exit(1);
}
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class FacebookfinishloginAction extends Action
{
private $facebook = null; // Facebook client
private $fbuid = null; // Facebook user ID
private $fbuser = null; // Facebook user object (JSON)
function prepare($args) {
parent::prepare($args);
$this->facebook = new Facebook(
array(
'appId' => common_config('facebook', 'appid'),
'secret' => common_config('facebook', 'secret'),
'cookie' => true,
)
);
// Check for a Facebook user session
$session = $this->facebook->getSession();
$me = null;
if ($session) {
try {
$this->fbuid = $this->facebook->getUser();
$this->fbuser = $this->facebook->api('/me');
} catch (FacebookApiException $e) {
common_log(LOG_ERROR, $e, __FILE__);
}
}
if (!empty($this->fbuser)) {
// OKAY, all is well... proceed to register
common_debug("Found a valid Facebook user.", __FILE__);
} else {
// This shouldn't happen in the regular course of things
list($proxy, $ip) = common_client_ip();
common_log(
LOG_WARNING,
sprintf(
'Failed Facebook authentication attempt, proxy = %s, ip = %s.',
$proxy,
$ip
),
__FILE__
);
$this->clientError(
_m('You must be logged into Facebook to register a local account using Facebook.')
);
}
return true;
}
function handle($args)
{
parent::handle($args);
if (common_is_real_login()) {
// User is already logged in, are her accounts already linked?
$flink = Foreign_link::getByForeignID($this->fbuid, FACEBOOK_SERVICE);
if (!empty($flink)) {
// User already has a linked Facebook account and shouldn't be here!
common_debug(
sprintf(
'There\'s already a local user %d linked with Facebook user %s.',
$flink->user_id,
$this->fbuid
)
);
$this->clientError(
_m('There is already a local account linked with that Facebook account.')
);
} else {
// Possibly reconnect an existing account
$this->connectUser();
}
} else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
$this->handlePost();
} else {
$this->tryLogin();
}
}
function handlePost()
{
$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;
}
// We has a valid Facebook session and the Facebook user has
// agreed to the SN license, so create a new user
$this->createNewUser();
} else if ($this->arg('connect')) {
$this->connectNewUser();
} else {
$this->showForm(
_m('An unknown error has occured.'),
$this->trimmed('newname')
);
}
}
function showPageNotice()
{
if ($this->error) {
$this->element('div', array('class' => 'error'), $this->error);
} else {
$this->element(
'div', 'instructions',
// TRANS: %s is the site name.
sprintf(
_m('This is the first time you\'ve logged into %s so we must connect your Facebook to a local account. You can either create a new local account, or connect with an existing local account.'),
common_config('site', 'name')
)
);
}
}
function title()
{
// TRANS: Page title.
return _m('Facebook Setup');
}
function showForm($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_facebook_connect',
'class' => 'form_settings',
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'action' => common_local_url('facebookfinishlogin')));
$this->elementStart('fieldset', array('id' => 'settings_facebook_connect_options'));
// TRANS: Legend.
$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'));
// TRANS: %s is the name of the license used by the user for their status updates.
$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->elementStart('fieldset');
$this->hidden('token', common_session_token());
$this->element('legend', null,
// TRANS: Legend.
_m('Create new account'));
$this->element('p', null,
_m('Create a new user with this nickname.'));
$this->elementStart('ul', 'form_data');
$this->elementStart('li');
// TRANS: Field label.
$this->input('newname', _m('New nickname'),
($this->username) ? $this->username : '',
_m('1-64 lowercase letters or numbers, no punctuation or spaces'));
$this->elementEnd('li');
$this->elementEnd('ul');
// TRANS: Submit button.
$this->submit('create', _m('BUTTON','Create'));
$this->elementEnd('fieldset');
$this->elementStart('fieldset');
// TRANS: Legend.
$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 Facebook.'));
$this->elementStart('ul', 'form_data');
$this->elementStart('li');
// TRANS: Field label.
$this->input('nickname', _m('Existing nickname'));
$this->elementEnd('li');
$this->elementStart('li');
$this->password('password', _m('Password'));
$this->elementEnd('li');
$this->elementEnd('ul');
// TRANS: Submit button.
$this->submit('connect', _m('BUTTON','Connect'));
$this->elementEnd('fieldset');
$this->elementEnd('fieldset');
$this->elementEnd('form');
}
function message($msg)
{
$this->message_text = $msg;
$this->showPage();
}
function createNewUser()
{
if (common_config('site', 'closed')) {
// TRANS: Client error trying to register with registrations not allowed.
$this->clientError(_m('Registration not allowed.'));
return;
}
$invite = null;
if (common_config('site', 'inviteonly')) {
$code = $_SESSION['invitecode'];
if (empty($code)) {
// TRANS: Client error trying to register with registrations 'invite only'.
$this->clientError(_m('Registration not allowed.'));
return;
}
$invite = Invitation::staticGet($code);
if (empty($invite)) {
// TRANS: Client error trying to register with an invalid invitation code.
$this->clientError(_m('Not a valid invitation code.'));
return;
}
}
$nickname = $this->trimmed('newname');
if (!Validate::string($nickname, array('min_length' => 1,
'max_length' => 64,
'format' => NICKNAME_FMT))) {
$this->showForm(_m('Nickname must have only lowercase letters and numbers and no spaces.'));
return;
}
if (!User::allowed_nickname($nickname)) {
$this->showForm(_m('Nickname not allowed.'));
return;
}
if (User::staticGet('nickname', $nickname)) {
$this->showForm(_m('Nickname already in use. Try another one.'));
return;
}
$args = array(
'nickname' => $nickname,
'fullname' => $this->fbuser['first_name']
. ' ' . $this->fbuser['last_name'],
'homepage' => $this->fbuser['website'],
'bio' => $this->fbuser['about'],
'location' => $this->fbuser['location']['name']
);
// It's possible that the email address is already in our
// DB. It's a unique key, so we need to check
if ($this->isNewEmail($this->fbuser['email'])) {
$args['email'] = $this->fbuser['email'];
$args['email_confirmed'] = true;
}
if (!empty($invite)) {
$args['code'] = $invite->code;
}
$user = User::register($args);
$result = $this->flinkUser($user->id, $this->fbuid);
if (!$result) {
$this->serverError(_m('Error connecting user to Facebook.'));
return;
}
// Add a Foreign_user record
Facebookclient::addFacebookUser($this->fbuser);
$this->setAvatar($user);
common_set_user($user);
common_real_login(true);
common_log(
LOG_INFO,
sprintf(
'Registered new user %s (%d) from Facebook user %s, (fbuid %d)',
$user->nickname,
$user->id,
$this->fbuser['name'],
$this->fbuid
),
__FILE__
);
$this->goHome($user->nickname);
}
/*
* Attempt to download the user's Facebook picture and create a
* StatusNet avatar for the new user.
*/
function setAvatar($user)
{
$picUrl = sprintf(
'http://graph.facebook.com/%s/picture?type=large',
$this->fbuid
);
// fetch the picture from Facebook
$client = new HTTPClient();
// fetch the actual picture
$response = $client->get($picUrl);
if ($response->isOk()) {
$finalUrl = $client->getUrl();
// Make sure the filename is unique becuase it's possible for a user
// to deauthorize our app, and then come back in as a new user but
// have the same Facebook picture (avatar URLs have a unique index
// and their URLs are based on the filenames).
$filename = 'facebook-' . common_good_rand(4) . '-'
. substr(strrchr($finalUrl, '/'), 1);
$ok = file_put_contents(
Avatar::path($filename),
$response->getBody()
);
if (!$ok) {
common_log(
LOG_WARNING,
sprintf(
'Couldn\'t save Facebook avatar %s',
$tmp
),
__FILE__
);
} else {
// save it as an avatar
$profile = $user->getProfile();
if ($profile->setOriginal($filename)) {
common_log(
LOG_INFO,
sprintf(
'Saved avatar for %s (%d) from Facebook picture for '
. '%s (fbuid %d), filename = %s',
$user->nickname,
$user->id,
$this->fbuser['name'],
$this->fbuid,
$filename
),
__FILE__
);
}
}
}
}
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(
sprintf(
'Found a legit user to connect to Facebook: %s (%d)',
$user->nickname,
$user->id
),
__FILE__
);
}
$this->tryLinkUser($user);
common_set_user($user);
common_real_login(true);
$this->goHome($user->nickname);
}
function connectUser()
{
$user = common_current_user();
$this->tryLinkUser($user);
common_redirect(common_local_url('facebookfinishlogin'), 303);
}
function tryLinkUser($user)
{
$result = $this->flinkUser($user->id, $this->fbuid);
if (empty($result)) {
$this->serverError(_m('Error connecting user to Facebook.'));
return;
}
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common_debug(
sprintf(
'Connected Facebook user %s (fbuid %d) to local user %s (%d)',
$this->fbuser['name'],
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$this->fbuid,
$user->nickname,
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$user->id
),
__FILE__
);
}
function tryLogin()
{
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common_debug(
sprintf(
'Trying login for Facebook user %s',
$this->fbuid
),
__FILE__
);
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$flink = Foreign_link::getByForeignID($this->fbuid, FACEBOOK_SERVICE);
if (!empty($flink)) {
$user = $flink->getUser();
if (!empty($user)) {
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common_log(
LOG_INFO,
sprintf(
'Logged in Facebook user %s as user %d (%s)',
$this->fbuid,
$user->nickname,
$user->id
),
__FILE__
);
common_set_user($user);
common_real_login(true);
$this->goHome($user->nickname);
}
} else {
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common_debug(
sprintf(
'No flink found for fbuid: %s - new user',
$this->fbuid
),
__FILE__
);
$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 flinkUser($user_id, $fbuid)
{
$flink = new Foreign_link();
$flink->user_id = $user_id;
$flink->foreign_id = $fbuid;
$flink->service = FACEBOOK_SERVICE;
// Pull the access token from the Facebook cookies
$flink->credentials = $this->facebook->getAccessToken();
$flink->created = common_sql_now();
$flink_id = $flink->insert();
return $flink_id;
}
function bestNewNickname()
{
if (!empty($this->fbuser['name'])) {
$nickname = $this->nicknamize($this->fbuser['name']);
if ($this->isNewNickname($nickname)) {
return $nickname;
}
}
// Try the full name
$fullname = trim($this->fbuser['first_name'] .
' ' . $this->fbuser['last_name']);
if (!empty($fullname)) {
$fullname = $this->nicknamize($fullname);
if ($this->isNewNickname($fullname)) {
return $fullname;
}
}
return null;
}
/**
* Given a string, try to make it work as a nickname
*/
function nicknamize($str)
{
$str = preg_replace('/\W/', '', $str);
return strtolower($str);
}
/*
* Is the desired nickname already taken?
*
* @return boolean result
*/
function isNewNickname($str)
{
if (
!Validate::string(
$str,
array(
'min_length' => 1,
'max_length' => 64,
'format' => NICKNAME_FMT
)
)
) {
return false;
}
if (!User::allowed_nickname($str)) {
return false;
}
if (User::staticGet('nickname', $str)) {
return false;
}
return true;
}
/*
* Do we already have a user record with this email?
* (emails have to be unique but they can change)
*
* @param string $email the email address to check
*
* @return boolean result
*/
function isNewEmail($email)
{
// we shouldn't have to validate the format
$result = User::staticGet('email', $email);
if (empty($result)) {
common_debug("XXXXXXXXXXXXXXXXXX We've never seen this email before!!!");
return true;
}
common_debug("XXXXXXXXXXXXXXXXXX dupe email address!!!!");
return false;
}
}