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 2010-2011 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 $fbuid = null; // Facebook user ID
private $fbuser = null; // Facebook user object (JSON)
private $accessToken = null; // Access token provided by Facebook JS API
function prepare($args) {
parent::prepare($args);
// Check cookie for a valid access_token
if (isset($_COOKIE['fb_access_token'])) {
$this->accessToken = $_COOKIE['fb_access_token'];
}
if (empty($this->accessToken)) {
$this->clientError(_m("Unable to authenticate you with Facebook."));
}
$graphUrl = 'https://graph.facebook.com/me?access_token=' . urlencode($this->accessToken);
$this->fbuser = json_decode(file_get_contents($graphUrl));
if (empty($this->fbuser)) {
// log badness
list($proxy, $ip) = common_client_ip();
common_log(
LOG_WARNING,
sprintf(
'Failed Facebook authentication attempt, proxy = %s, ip = %s.',
$proxy,
$ip
),
__FILE__
);
$this->clientError(
// TRANS: Client error displayed when trying to connect to Facebook while not logged in.
_m('You must be logged into Facebook to register a local account using Facebook.')
);
}
$this->fbuid = $this->fbuser->id;
// OKAY, all is well... proceed to register
return true;
}
function handle()
{
parent::handle();
if (common_is_real_login()) {
// This will throw a client exception if the user already
// has some sort of foreign_link to Facebook.
$this->checkForExistingLink();
// Possibly reconnect an existing account
$this->connectUser();
} else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
$this->handlePost();
} else {
$this->tryLogin();
}
}
function checkForExistingLink() {
// 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!
$this->clientError(
// TRANS: Client error displayed when trying to connect to a Facebook account that is already linked
// TRANS: in the same StatusNet site.
_m('There is already a local account linked with that Facebook account.')
);
}
$cur = common_current_user();
$flink = Foreign_link::getByUserID($cur->id, FACEBOOK_SERVICE);
if (!empty($flink)) {
// There's already a local user linked to this Facebook account.
$this->clientError(
// TRANS: Client error displayed when trying to connect to a Facebook account that is already linked
// TRANS: in the same StatusNet site.
_m('There is already a local account linked with that Facebook account.')
);
}
}
function handlePost()
{
$token = $this->trimmed('token');
// CSRF protection
if (!$token || $token != common_session_token()) {
$this->showForm(
// TRANS: Client error displayed when the session token does not match or is not given.
_m('There was a problem with your session token. Try again, please.')
);
return;
}
if ($this->arg('create')) {
if (!$this->boolean('license')) {
$this->showForm(
// TRANS: Form validation error displayed when user has not agreed to the license.
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_m('You cannot register if you do not 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(
// TRANS: Form validation error displayed when an unhandled error occurs.
_m('An unknown error has occured.'),
$this->trimmed('newname')
);
}
}
function showPageNotice()
{
if ($this->error) {
$this->element('div', array('class' => 'error'), $this->error);
} else {
$this->element(
'div', 'instructions',
sprintf(
// TRANS: Form instructions for connecting to Facebook.
// TRANS: %s is the site name.
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_m('This is the first time you have logged into %s so we must connect your Facebook to a local account. You can either create a new local account, or connect with an existing local account.'),
common_config('site', 'name')
)
);
}
}
function title()
{
// TRANS: Page title.
return _m('Facebook Setup');
}
function showForm($error=null, $username=null)
{
$this->error = $error;
$this->username = $username;
$this->showPage();
}
function showPage()
{
parent::showPage();
}
/**
* @todo FIXME: Much of this duplicates core code, which is very fragile.
* Should probably be replaced with an extensible mini version of
* the core registration form.
*/
function showContent()
{
if (!empty($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: Fieldset 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: Fieldset legend.
_m('Create new account'));
$this->element('p', null,
// TRANS: Form instructions.
_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) ? $this->username : '',
// TRANS: Field title.
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_m('1-64 lowercase letters or numbers, no punctuation or spaces.'));
$this->elementEnd('li');
// Hook point for captcha etc
Event::handle('EndRegistrationFormData', array($this));
$this->elementEnd('ul');
// TRANS: Submit button to create a new account.
$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: Form instructions.
_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');
// TRANS: Field label.
$this->password('password', _m('Password'));
$this->elementEnd('li');
$this->elementEnd('ul');
// TRANS: Submit button to connect a Facebook account to an existing StatusNet account.
$this->submit('connect', _m('BUTTON','Connect'));
$this->elementEnd('fieldset');
$this->elementEnd('fieldset');
$this->elementEnd('form');
}
function message($msg)
{
$this->message_text = $msg;
$this->showPage();
}
function createNewUser()
{
if (!Event::handle('StartRegistrationTry', array($this))) {
return;
}
if (common_config('site', 'closed')) {
// TRANS: Client error trying to register with registrations not allowed.
$this->clientError(_m('Registration not allowed.'));
}
$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.'));
}
$invite = Invitation::getKV($code);
if (empty($invite)) {
// TRANS: Client error trying to register with an invalid invitation code.
$this->clientError(_m('Not a valid invitation code.'));
}
}
try {
$nickname = Nickname::normalize($this->trimmed('newname'), true);
} catch (NicknameException $e) {
$this->showForm($e->getMessage());
return;
}
$args = array(
'nickname' => $nickname,
'fullname' => $this->fbuser->name,
'homepage' => $this->fbuser->website,
'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'] = $this->fbuser->email;
if (isset($this->fuser->verified) && $this->fuser->verified == true) {
$args['email_confirmed'] = true;
}
}
if (!empty($invite)) {
$args['code'] = $invite->code;
}
$user = User::register($args);
$result = $this->flinkUser($user->id, $this->fbuid);
if (!$result) {
// TRANS: Server error displayed when connecting to Facebook fails.
$this->serverError(_m('Error connecting user to Facebook.'));
}
// Add a Foreign_user record
Facebookclient::addFacebookUser($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,
$this->fbuid
),
__FILE__
);
Event::handle('EndRegistrationTry', array($this));
$this->goHome($user->nickname);
}
/*
* Attempt to download the user's Facebook picture and create a
* StatusNet avatar for the new user.
*/
function setAvatar($user)
{
try {
$picUrl = sprintf(
'http://graph.facebook.com/%d/picture?type=large',
$this->fbuser->id
);
// fetch the picture from Facebook
$client = new HTTPClient();
// fetch the actual picture
$response = $client->get($picUrl);
if ($response->isOk()) {
// seems to always be jpeg, but not sure
$tmpname = "facebook-avatar-tmp-" . common_random_hexstr(4);
$ok = file_put_contents(
Avatar::path($tmpname),
$response->getBody()
);
if (!$ok) {
common_log(LOG_WARNING, 'Couldn\'t save tmp Facebook avatar: ' . $tmpname, __FILE__);
} else {
// save it as an avatar
$imagefile = new ImageFile(null, Avatar::path($tmpname));
$filename = Avatar::filename($user->id, image_type_to_extension($imagefile->preferredType()),
180, common_timestamp());
// Previous docs said 180 is the "biggest img we get from Facebook"
$imagefile->resizeTo(Avatar::path($filename, array('width'=>180, 'height'=>180)));
// No need to keep the temporary file around...
@unlink(Avatar::path($tmpname));
$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__
);
// clean up tmp file
}
}
}
} catch (Exception $e) {
common_log(LOG_WARNING, 'Couldn\'t save Facebook avatar: ' . $e->getMessage(), __FILE__);
// error isn't fatal, continue
}
}
function connectNewUser()
{
$nickname = $this->trimmed('nickname');
$password = $this->trimmed('password');
if (!common_check_user($nickname, $password)) {
// TRANS: Form validation error displayed when username/password combination is incorrect.
$this->showForm(_m('Invalid username or password.'));
return;
}
$user = User::getKV('nickname', $nickname);
$this->tryLinkUser($user);
common_set_user($user);
common_real_login(true);
// clear out the stupid cookie
setcookie('fb_access_token', '', time() - 3600); // one hour ago
$this->goHome($user->nickname);
}
function connectUser()
{
$user = common_current_user();
$this->tryLinkUser($user);
// clear out the stupid cookie
setcookie('fb_access_token', '', time() - 3600); // one hour ago
common_redirect(common_local_url('facebookfinishlogin'), 303);
}
function tryLinkUser($user)
{
$result = $this->flinkUser($user->id, $this->fbuid);
if (empty($result)) {
// TRANS: Server error displayed when connecting to Facebook fails.
$this->serverError(_m('Error connecting user to Facebook.'));
}
}
function tryLogin()
{
try {
$flink = Foreign_link::getByForeignID($this->fbuid, FACEBOOK_SERVICE);
$user = $flink->getUser();
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);
// clear out the stupid cookie
setcookie('fb_access_token', '', time() - 3600); // one hour ago
$this->goHome($user->nickname);
} catch (NoResultException $e) {
$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;
$flink->credentials = $this->accessToken;
$flink->created = common_sql_now();
$flink_id = $flink->insert();
return $flink_id;
}
function bestNewNickname()
{
try {
$nickname = Nickname::normalize($this->fbuser->username, true);
return $nickname;
} catch (NicknameException $e) {
// Failed to normalize nickname, but let's try the full name
}
try {
$nickname = Nickname::normalize($this->fbuser->name, true);
return $nickname;
} catch (NicknameException $e) {
// Any more ideas? Nope.
}
return null;
}
/*
* 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::getKV('email', $email);
if (empty($result)) {
return true;
}
return false;
}
}