gnu-social/plugins/FBConnect/FBConnectAuth.php

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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* Plugin to enable Facebook Connect
*
* 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 Laconica
* @author Zach Copley <zach@controlyourself.ca>
* @copyright 2009 Control Yourself, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
require_once INSTALLDIR . '/plugins/FBConnect/FBConnectPlugin.php';
class FBConnectauthAction extends Action
{
var $fbuid = null;
var $fb_fields = null;
function prepare($args) {
parent::prepare($args);
try {
$this->fbuid = getFacebook()->get_loggedin_user();
if ($this->fbuid > 0) {
$this->fb_fields = $this->getFacebookFields($this->fbuid,
array('first_name', 'last_name', 'name'));
} else {
common_debug("No Facebook User found.");
}
} catch (Exception $e) {
common_log(LOG_WARNING, 'Problem getting Facebook uid: ' .
$e->getMessage());
}
return true;
}
function handle($args)
{
parent::handle($args);
if (common_is_real_login()) {
// User is already logged in. Does she already have a linked Facebook acct?
$flink = Foreign_link::getByForeignID($this->fbuid, FACEBOOK_CONNECT_SERVICE);
if (!empty($flink)) {
// User already has a linked Facebook account and shouldn't be here
common_debug('There is already a local user (' . $flink->user_id .
') linked with this Facebook (' . $this->fbuid . ').');
// We don't want these cookies
getFacebook()->clear_cookie_state();
$this->clientError(_('There is already a local user linked with this Facebook.'));
} else {
// User came from the Facebook connect settings tab, and
// probably just wants to link/relink their Facebook account
$this->connectUser();
}
} else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
$token = $this->trimmed('token');
if (!$token || $token != common_session_token()) {
$this->showForm(_('There was a problem with your session token. Try again, please.'));
return;
}
if ($this->arg('create')) {
if (!$this->boolean('license')) {
$this->showForm(_('You can\'t register if you don\'t agree to the license.'),
$this->trimmed('newname'));
return;
}
$this->createNewUser();
} else if ($this->arg('connect')) {
$this->connectNewUser();
} else {
common_debug(print_r($this->args, true), __FILE__);
$this->showForm(_('Something weird happened.'),
$this->trimmed('newname'));
}
} else {
$this->tryLogin();
}
}
function showPageNotice()
{
if ($this->error) {
$this->element('div', array('class' => 'error'), $this->error);
} else {
$this->element('div', 'instructions',
sprintf(_('This is the first time you\'ve logged into %s so we must connect your Facebook to a local account. You can either create a new account, or connect with your existing account, if you have one.'), common_config('site', 'name')));
}
}
function title()
{
return _('Facebook Account Setup');
}
function showForm($error=null, $username=null)
{
$this->error = $error;
$this->username = $username;
$this->showPage();
}
function showPage()
{
parent::showPage();
}
function showContent()
{
if (!empty($this->message_text)) {
$this->element('p', null, $this->message);
return;
}
$this->elementStart('form', array('method' => 'post',
'id' => 'form_settings_facebook_connect',
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'class' => 'form_settings',
'action' => common_local_url('FBConnectAuth')));
$this->elementStart('fieldset', array('id' => 'settings_facebook_connect_options'));
$this->element('legend', null, _('Connection options'));
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$this->elementStart('ul', 'form_data');
$this->elementStart('li');
$this->element('input', array('type' => 'checkbox',
'id' => 'license',
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'class' => 'checkbox',
'name' => 'license',
'value' => 'true'));
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$this->elementStart('label', array('class' => 'checkbox', 'for' => 'license'));
$this->text(_('My text and files are available under '));
$this->element('a', array('href' => common_config('license', 'url')),
common_config('license', 'title'));
$this->text(_(' except this private data: password, email address, IM address, phone number.'));
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$this->elementEnd('label');
$this->elementEnd('li');
$this->elementEnd('ul');
$this->elementStart('fieldset');
$this->hidden('token', common_session_token());
$this->element('legend', null,
_('Create new account'));
$this->element('p', null,
_('Create a new user with this nickname.'));
$this->elementStart('ul', 'form_data');
$this->elementStart('li');
$this->input('newname', _('New nickname'),
($this->username) ? $this->username : '',
_('1-64 lowercase letters or numbers, no punctuation or spaces'));
$this->elementEnd('li');
$this->elementEnd('ul');
$this->submit('create', _('Create'));
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$this->elementEnd('fieldset');
$this->elementStart('fieldset');
$this->element('legend', null,
_('Connect existing account'));
$this->element('p', null,
_('If you already have an account, login with your username and password to connect it to your Facebook.'));
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$this->elementStart('ul', 'form_data');
$this->elementStart('li');
$this->input('nickname', _('Existing nickname'));
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$this->elementEnd('li');
$this->elementStart('li');
$this->password('password', _('Password'));
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$this->elementEnd('li');
$this->elementEnd('ul');
$this->submit('connect', _('Connect'));
$this->elementEnd('fieldset');
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$this->elementEnd('fieldset');
$this->elementEnd('form');
}
function message($msg)
{
$this->message_text = $msg;
$this->showPage();
}
function createNewUser()
{
if (common_config('site', 'closed')) {
$this->clientError(_('Registration not allowed.'));
return;
}
$invite = null;
if (common_config('site', 'inviteonly')) {
$code = $_SESSION['invitecode'];
if (empty($code)) {
$this->clientError(_('Registration not allowed.'));
return;
}
$invite = Invitation::staticGet($code);
if (empty($invite)) {
$this->clientError(_('Not a valid invitation code.'));
return;
}
}
$nickname = $this->trimmed('newname');
if (!Validate::string($nickname, array('min_length' => 1,
'max_length' => 64,
'format' => VALIDATE_NUM . VALIDATE_ALPHA_LOWER))) {
$this->showForm(_('Nickname must have only lowercase letters and numbers and no spaces.'));
return;
}
if (!User::allowed_nickname($nickname)) {
$this->showForm(_('Nickname not allowed.'));
return;
}
if (User::staticGet('nickname', $nickname)) {
$this->showForm(_('Nickname already in use. Try another one.'));
return;
}
$fullname = trim($this->fb_fields['firstname'] .
' ' . $this->fb_fields['lastname']);
$args = array('nickname' => $nickname, 'fullname' => $fullname);
if (!empty($invite)) {
$args['code'] = $invite->code;
}
$user = User::register($args);
$result = $this->flinkUser($user->id, $this->fbuid);
if (!$result) {
$this->serverError(_('Error connecting user to Facebook.'));
return;
}
common_set_user($user);
common_real_login(true);
common_debug("Registered new user $user->id from Facebook user $this->fbuid");
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(_('Invalid username or password.'));
return;
}
$user = User::staticGet('nickname', $nickname);
if ($user) {
common_debug("Legit user to connect to Facebook: $nickname");
}
$result = $this->flinkUser($user->id, $this->fbuid);
if (!$result) {
$this->serverError(_('Error connecting user to Facebook.'));
return;
}
common_debug("Connected Facebook user $this->fbuid 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, $this->fbuid);
if (!$result) {
$this->serverError(_('Error connecting user to Facebook.'));
return;
}
common_debug("Connected Facebook user $this->fbuid to local user $user->id");
// Return to Facebook connection settings tab
common_redirect(common_local_url('FBConnectSettings'), 303);
}
function tryLogin()
{
common_debug("Trying Facebook Login...");
$flink = Foreign_link::getByForeignID($this->fbuid, FACEBOOK_CONNECT_SERVICE);
if ($flink) {
$user = $flink->getUser();
if (!empty($user)) {
common_debug("Logged in Facebook 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("No flink found for fbuid: $this->fbuid");
$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_CONNECT_SERVICE;
$flink->created = common_sql_now();
$flink_id = $flink->insert();
return $flink_id;
}
function bestNewNickname()
{
if (!empty($this->fb_fields['name'])) {
$nickname = $this->nicknamize($this->fb_fields['name']);
if ($this->isNewNickname($nickname)) {
return $nickname;
}
}
// Try the full name
$fullname = trim($this->fb_fields['firstname'] .
' ' . $this->fb_fields['lastname']);
if (!empty($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);
}
function isNewNickname($str)
{
if (!Validate::string($str, array('min_length' => 1,
'max_length' => 64,
'format' => VALIDATE_NUM . VALIDATE_ALPHA_LOWER))) {
return false;
}
if (!User::allowed_nickname($str)) {
return false;
}
if (User::staticGet('nickname', $str)) {
return false;
}
return true;
}
// XXX: Consider moving this to lib/facebookutil.php
function getFacebookFields($fb_uid, $fields) {
try {
$facebook = getFacebook();
$infos = $facebook->api_client->users_getInfo($fb_uid, $fields);
if (empty($infos)) {
return null;
}
return reset($infos);
} catch (Exception $e) {
common_log(LOG_WARNING, "Facebook client failure when requesting " .
join(",", $fields) . " on uid " . $fb_uid .
" : ". $e->getMessage());
return null;
}
}
}