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<?php
/**
* Handler for remote subscription
*
* PHP version 5
*
* @category Action
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @author Robin Millette <millette@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://laconi.ca/
*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, 2009, Control Yourself, Inc.
*
* 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/>.
**/
if (!defined('LACONICA')) {
exit(1);
}
require_once INSTALLDIR.'/lib/omb.php';
require_once INSTALLDIR.'/extlib/libomb/service_consumer.php';
require_once INSTALLDIR.'/extlib/libomb/profile.php';
/**
* Handler for remote subscription
*
* @category Action
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @author Robin Millette <millette@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://laconi.ca/
*/
class RemotesubscribeAction extends Action
{
var $nickname;
var $profile_url;
var $err;
function prepare($args)
{
parent::prepare($args);
if (common_logged_in()) {
$this->clientError(_('You can use the local subscription!'));
return false;
}
$this->nickname = $this->trimmed('nickname');
$this->profile_url = $this->trimmed('profile_url');
return true;
}
function handle($args)
{
parent::handle($args);
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
/* Use a session token for CSRF protection. */
$token = $this->trimmed('token');
if (!$token || $token != common_session_token()) {
$this->showForm(_('There was a problem with your session token. '.
'Try again, please.'));
return;
}
$this->remoteSubscription();
} else {
$this->showForm();
}
}
function showForm($err=null)
{
$this->err = $err;
$this->showPage();
}
function showPageNotice()
{
if ($this->err) {
$this->element('div', 'error', $this->err);
} else {
$inst = sprintf(_('To subscribe, you can [login](%%%%action.%s%%%%),' .
' or [register](%%%%action.%s%%%%) a new ' .
' account. If you already have an account ' .
' on a [compatible microblogging site](%%doc.openmublog%%), ' .
' enter your profile URL below.'),
(!common_config('site','openidonly')) ? 'login' : 'openidlogin',
(!common_config('site','openidonly')) ? 'register' : 'openidlogin');
$output = common_markup_to_html($inst);
$this->elementStart('div', 'instructions');
$this->raw($output);
$this->elementEnd('div');
}
}
function title()
{
return _('Remote subscribe');
}
function showContent()
{
/* The id 'remotesubscribe' conflicts with the
button on profile page. */
$this->elementStart('form', array('id' => 'form_remote_subscribe',
'method' => 'post',
'class' => 'form_settings',
'action' => common_local_url('remotesubscribe')));
$this->elementStart('fieldset');
$this->element('legend', _('Subscribe to a remote user'));
$this->hidden('token', common_session_token());
$this->elementStart('ul', 'form_data');
$this->elementStart('li');
$this->input('nickname', _('User nickname'), $this->nickname,
_('Nickname of the user you want to follow'));
$this->elementEnd('li');
$this->elementStart('li');
$this->input('profile_url', _('Profile URL'), $this->profile_url,
_('URL of your profile on another compatible microblogging service'));
$this->elementEnd('li');
$this->elementEnd('ul');
$this->submit('submit', _('Subscribe'));
$this->elementEnd('fieldset');
$this->elementEnd('form');
}
function remoteSubscription()
{
if (!$this->nickname) {
$this->showForm(_('No such user.'));
return;
}
$user = User::staticGet('nickname', $this->nickname);
$this->profile_url = $this->trimmed('profile_url');
if (!$this->profile_url) {
$this->showForm(_('No such user'));
return;
}
if (!common_valid_http_url($this->profile_url)) {
$this->showForm(_('Invalid profile URL (bad format)'));
return;
}
try {
$service = new OMB_Service_Consumer($this->profile_url,
common_root_url(),
omb_oauth_datastore());
} catch (OMB_InvalidYadisException $e) {
$this->showForm(_('Not a valid profile URL (no YADIS document or ' .
'no or invalid XRDS defined).'));
return;
}
if ($service->getServiceURI(OAUTH_ENDPOINT_REQUEST) ==
common_local_url('requesttoken') ||
User::staticGet('uri', $service->getRemoteUserURI())) {
$this->showForm(_('That’s a local profile! Login to subscribe.'));
return;
}
try {
$service->requestToken();
} catch (OMB_RemoteServiceException $e) {
$this->showForm(_('Couldn’t get a request token.'));
return;
}
/* Create an OMB_Profile from $user. */
$profile = $user->getProfile();
if (!$profile) {
common_log_db_error($user, 'SELECT', __FILE__);
$this->serverError(_('User without matching profile'));
return;
}
$target_url = $service->requestAuthorization(
profile_to_omb_profile($user->uri, $profile),
common_local_url('finishremotesubscribe'));
common_ensure_session();
$_SESSION['oauth_authorization_request'] = serialize($service);
/* Redirect to the remote service for authorization. */
common_redirect($target_url, 303);
}
}
?>
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