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<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2010, StatusNet, 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/>.
*/
/**
* @package OStatusPlugin
* @maintainer James Walker <james@status.net>
*/
if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
class OStatusInitAction extends Action
{
var $nickname;
var $group;
var $profile;
var $err;
function prepare($args)
{
parent::prepare($args);
if (common_logged_in()) {
$this->clientError(_m('You can use the local subscription!'));
return false;
}
// Local user or group the remote wants to subscribe to
$this->nickname = $this->trimmed('nickname');
$this->group = $this->trimmed('group');
// Webfinger or profile URL of the remote user
$this->profile = $this->trimmed('profile');
return true;
}
function handle($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(_m('There was a problem with your session token. '.
'Try again, please.'));
return;
}
$this->ostatusConnect();
} else {
$this->showForm();
}
}
function showForm($err = null)
{
$this->err = $err;
if ($this->boolean('ajax')) {
header('Content-Type: text/xml;charset=utf-8');
$this->xw->startDocument('1.0', 'UTF-8');
$this->elementStart('html');
$this->elementStart('head');
$this->element('title', null, _m('Subscribe to user'));
$this->elementEnd('head');
$this->elementStart('body');
$this->showContent();
$this->elementEnd('body');
$this->elementEnd('html');
} else {
$this->showPage();
}
}
function showContent()
{
if ($this->group) {
$header = sprintf(_m('Join group %s'), $this->group);
$submit = _m('Join');
} else {
$header = sprintf(_m('Subscribe to %s'), $this->nickname);
$submit = _m('Subscribe');
}
$this->elementStart('form', array('id' => 'form_ostatus_connect',
'method' => 'post',
'class' => 'form_settings',
'action' => common_local_url('ostatusinit')));
$this->elementStart('fieldset');
$this->element('legend', null, $header);
$this->hidden('token', common_session_token());
$this->elementStart('ul', 'form_data');
$this->elementStart('li', array('id' => 'ostatus_nickname'));
$this->input('nickname', _m('User nickname'), $this->nickname,
_m('Nickname of the user you want to follow'));
$this->hidden('group', $this->group); // pass-through for magic links
$this->elementEnd('li');
$this->elementStart('li', array('id' => 'ostatus_profile'));
$this->input('profile', _m('Profile Account'), $this->profile,
_m('Your account id (i.e. user@identi.ca)'));
$this->elementEnd('li');
$this->elementEnd('ul');
$this->submit('submit', $submit);
$this->elementEnd('fieldset');
$this->elementEnd('form');
}
function ostatusConnect()
{
$opts = array('allowed_schemes' => array('http', 'https', 'acct'));
if (Validate::uri($this->profile, $opts)) {
$bits = parse_url($this->profile);
if ($bits['scheme'] == 'acct') {
$this->connectWebfinger($bits['path']);
} else {
$this->connectProfile($this->profile);
}
} elseif (strpos($this->profile, '@') !== false) {
$this->connectWebfinger($this->profile);
} else {
$this->clientError(_m("Must provide a remote profile."));
}
}
function connectWebfinger($acct)
{
$target_profile = $this->targetProfile();
$disco = new Discovery;
$result = $disco->lookup($acct);
if (!$result) {
$this->clientError(_m("Couldn't look up OStatus account profile."));
}
foreach ($result->links as $link) {
if ($link['rel'] == 'http://ostatus.org/schema/1.0/subscribe') {
// We found a URL - let's redirect!
$url = Discovery::applyTemplate($link['template'], $target_profile);
common_log(LOG_INFO, "Sending remote subscriber $acct to $url");
common_redirect($url, 303);
}
}
$this->clientError(_m("Couldn't confirm remote profile address."));
}
function connectProfile($subscriber_profile)
{
$target_profile = $this->targetProfile();
// @fixme hack hack! We should look up the remote sub URL from XRDS
$suburl = preg_replace('!^(.*)/(.*?)$!', '$1/main/ostatussub', $subscriber_profile);
$suburl .= '?profile=' . urlencode($target_profile);
common_log(LOG_INFO, "Sending remote subscriber $subscriber_profile to $suburl");
common_redirect($suburl, 303);
}
/**
* Build the canonical profile URI+URL of the requested user or group
*/
function targetProfile()
{
if ($this->nickname) {
$user = User::staticGet('nickname', $this->nickname);
if ($user) {
return common_local_url('userbyid', array('id' => $user->id));
} else {
$this->clientError("No such user.");
}
} else if ($this->group) {
$group = Local_group::staticGet('id', $this->group);
if ($group) {
return common_local_url('groupbyid', array('id' => $group->group_id));
} else {
$this->clientError("No such group.");
}
} else {
$this->clientError("No local user or group nickname provided.");
}
}
function title()
{
return _m('OStatus Connect');
}
}
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