gnu-social/plugins/OStatus/actions/ostatusinit.php

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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')) {
exit(1);
}
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class OStatusInitAction extends Action
{
var $nickname;
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var $tagger;
var $peopletag;
var $group;
var $profile;
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var $err;
protected function prepare(array $args=array())
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{
parent::prepare($args);
if (common_logged_in()) {
// TRANS: Client error.
$this->clientError(_m('You can use the local subscription!'));
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}
// Local user or group the remote wants to subscribe to
$this->nickname = $this->trimmed('nickname');
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$this->tagger = $this->trimmed('tagger');
$this->peopletag = $this->trimmed('peopletag');
$this->group = $this->trimmed('group');
// Webfinger or profile URL of the remote user
$this->profile = $this->trimmed('profile');
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return true;
}
protected function handle()
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{
parent::handle();
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if ($_SERVER['REQUEST_METHOD'] == 'POST') {
/* Use a session token for CSRF protection. */
$token = $this->trimmed('token');
if (!$token || $token != common_session_token()) {
// TRANS: Client error displayed when the session token does not match or is not given.
$this->showForm(_m('There was a problem with your session token. '.
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'Try again, please.'));
return;
}
$this->ostatusConnect();
} else {
$this->showForm();
}
}
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function showForm($err = null)
{
$this->err = $err;
if ($this->boolean('ajax')) {
$this->startHTML('text/xml;charset=utf-8');
$this->elementStart('head');
// TRANS: Form title.
$this->element('title', null, _m('TITLE','Subscribe to user'));
$this->elementEnd('head');
$this->elementStart('body');
$this->showContent();
$this->elementEnd('body');
$this->endHTML();
} else {
$this->showPage();
}
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}
function showContent()
{
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if ($this->group) {
// TRANS: Form legend. %s is a group name.
$header = sprintf(_m('Join group %s'), $this->group);
// TRANS: Button text to join a group.
$submit = _m('BUTTON','Join');
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} else if ($this->peopletag && $this->tagger) {
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// TRANS: Form legend. %1$s is a list, %2$s is a lister's name.
$header = sprintf(_m('Subscribe to list %1$s by %2$s'), $this->peopletag, $this->tagger);
// TRANS: Button text to subscribe to a list.
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$submit = _m('BUTTON','Subscribe');
// TRANS: Button text.
} else {
// TRANS: Form legend. %s is a nickname.
$header = sprintf(_m('Subscribe to %s'), $this->nickname);
// TRANS: Button text to subscribe to a profile.
$submit = _m('BUTTON','Subscribe');
}
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$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, $header);
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$this->hidden('token', common_session_token());
$this->elementStart('ul', 'form_data');
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$this->elementStart('li', array('id' => 'ostatus_nickname'));
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if ($this->group) {
// TRANS: Field label.
$this->input('group', _m('Group nickname'), $this->group,
// TRANS: Field title.
_m('Nickname of the group you want to join.'));
} else {
// TRANS: Field label.
$this->input('nickname', _m('User nickname'), $this->nickname,
// TRANS: Field title.
_m('Nickname of the user you want to follow.'));
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$this->hidden('tagger', $this->tagger);
$this->hidden('peopletag', $this->peopletag);
}
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$this->elementEnd('li');
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$this->elementStart('li', array('id' => 'ostatus_profile'));
// TRANS: Field label.
$this->input('profile', _m('Profile Account'), $this->profile,
// TRANS: Tooltip for field label "Profile Account".
_m('Your account ID (e.g. user@example.com).'));
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$this->elementEnd('li');
$this->elementEnd('ul');
$this->submit('submit', $submit);
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$this->elementEnd('fieldset');
$this->elementEnd('form');
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}
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function ostatusConnect()
{
$validate = new Validate();
$opts = array('allowed_schemes' => array('http', 'https', 'acct'));
if ($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 {
// TRANS: Client error.
$this->clientError(_m('Must provide a remote profile.'));
}
}
function connectWebfinger($acct)
{
$target_profile = $this->targetProfile();
$disco = new Discovery;
$xrd = $disco->lookup($acct);
$link = $xrd->get('http://ostatus.org/schema/1.0/subscribe');
if (!is_null($link)) {
// We found a URL - let's redirect!
if (!empty($link->template)) {
$url = Discovery::applyTemplate($link->template, $target_profile);
} else {
$url = $link->href;
}
common_log(LOG_INFO, "Sending remote subscriber $acct to $url");
common_redirect($url, 303);
}
// TRANS: Client error.
$this->clientError(_m('Could not confirm remote profile address.'));
}
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function connectProfile($subscriber_profile)
{
$target_profile = $this->targetProfile();
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// @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);
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common_log(LOG_INFO, "Sending remote subscriber $subscriber_profile to $suburl");
common_redirect($suburl, 303);
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}
/**
* Build the canonical profile URI+URL of the requested user or group
*/
function targetProfile()
{
if ($this->nickname) {
$user = User::getKV('nickname', $this->nickname);
if ($user) {
return common_local_url('userbyid', array('id' => $user->id));
} else {
// TRANS: Client error.
$this->clientError(_m('No such user.'));
}
} else if ($this->group) {
$group = Local_group::getKV('nickname', $this->group);
if ($group instanceof Local_group) {
return common_local_url('groupbyid', array('id' => $group->group_id));
} else {
// TRANS: Client error.
$this->clientError(_m('No such group.'));
}
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} else if ($this->peopletag && $this->tagger) {
$user = User::getKV('nickname', $this->tagger);
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if (empty($user)) {
// TRANS: Client error.
$this->clientError(_m('No such user.'));
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}
$peopletag = Profile_list::getByTaggerAndTag($user->id, $this->peopletag);
if ($peopletag) {
return common_local_url('profiletagbyid',
array('tagger_id' => $user->id, 'id' => $peopletag->id));
}
// TRANS: Client error.
$this->clientError(_m('No such list.'));
} else {
// TRANS: Client error.
$this->clientError(_m('No local user or group nickname provided.'));
}
}
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function title()
{
// TRANS: Page title.
return _m('OStatus Connect');
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}
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}