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

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<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2009, StatusNet, Inc.
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*
* 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 Brion Vibber <brion@status.net>
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*/
if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
/**
* Key UI methods:
*
* showInputForm() - form asking for a remote profile account or URL
* We end up back here on errors
*
* showPreviewForm() - surrounding form for preview-and-confirm
* previewUser() - display profile for a remote user
* previewGroup() - display profile for a remote group
*
* successUser() - redirects to subscriptions page on subscribe
* successGroup() - redirects to groups page on join
*/
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class OStatusSubAction extends Action
{
protected $profile_uri; // provided acct: or URI of remote entity
protected $oprofile; // Ostatus_profile of remote entity, if valid
/**
* Show the initial form, when we haven't yet been given a valid
* remote profile.
*/
function showInputForm()
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{
$user = common_current_user();
$profile = $user->getProfile();
$this->elementStart('form', array('method' => 'post',
'id' => 'form_ostatus_sub',
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'class' => 'form_settings',
'action' =>
common_local_url('ostatussub')));
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$this->hidden('token', common_session_token());
$this->elementStart('fieldset', array('id' => 'settings_feeds'));
$this->elementStart('ul', 'form_data');
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$this->elementStart('li');
$this->input('profile',
_m('Address or profile URL'),
$this->profile_uri,
_m('Enter the profile URL of a PubSubHubbub-enabled feed'));
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$this->elementEnd('li');
$this->elementEnd('ul');
$this->submit('validate', _m('Continue'));
$this->elementEnd('fieldset');
$this->elementEnd('form');
}
/**
* Show the preview-and-confirm form. We've got a valid remote
* profile and are ready to poke it!
*
* This controls the wrapper form; actual profile display will
* be in previewUser() or previewGroup() depending on the type.
*/
function showPreviewForm()
{
if ($this->oprofile->isGroup()) {
$ok = $this->previewGroup();
} else {
$ok = $this->previewUser();
}
if (!$ok) {
// @fixme maybe provide a cancel button or link back?
return;
}
$this->elementStart('div', 'entity_actions');
$this->elementStart('ul');
$this->elementStart('li', 'entity_subscribe');
$this->elementStart('form', array('method' => 'post',
'id' => 'form_ostatus_sub',
'class' => 'form_remote_authorize',
'action' =>
common_local_url('ostatussub')));
$this->elementStart('fieldset');
$this->hidden('token', common_session_token());
$this->hidden('profile', $this->profile_uri);
if ($this->oprofile->isGroup()) {
$this->submit('submit', _m('Join'), 'submit', null,
_m('Join this group'));
} else {
$this->submit('submit', _m('Subscribe'), 'submit', null,
_m('Subscribe to this user'));
}
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$this->elementEnd('fieldset');
$this->elementEnd('form');
$this->elementEnd('li');
$this->elementEnd('ul');
$this->elementEnd('div');
}
/**
* Show a preview for a remote user's profile
* @return boolean true if we're ok to try subscribing
*/
function previewUser()
{
$oprofile = $this->oprofile;
$profile = $oprofile->localProfile();
$cur = common_current_user();
if ($cur->isSubscribed($profile)) {
$this->element('div', array('class' => 'error'),
_m("You are already subscribed to this user."));
$ok = false;
} else {
$ok = true;
}
$avatar = $profile->getAvatar(AVATAR_PROFILE_SIZE);
$avatarUrl = $avatar ? $avatar->displayUrl() : false;
$this->showEntity($profile,
$profile->profileurl,
$avatarUrl,
$profile->bio);
return $ok;
}
/**
* Show a preview for a remote group's profile
* @return boolean true if we're ok to try joining
*/
function previewGroup()
{
$oprofile = $this->oprofile;
$group = $oprofile->localGroup();
$cur = common_current_user();
if ($cur->isMember($group)) {
$this->element('div', array('class' => 'error'),
_m("You are already a member of this group."));
$ok = false;
} else {
$ok = true;
}
$this->showEntity($group,
$group->getProfileUrl(),
$group->homepage_logo,
$group->description);
return $ok;
}
function showEntity($entity, $profile, $avatar, $note)
{
$nickname = $entity->nickname;
$fullname = $entity->fullname;
$homepage = $entity->homepage;
$location = $entity->location;
if (!$avatar) {
$avatar = Avatar::defaultImage(AVATAR_PROFILE_SIZE);
}
$this->elementStart('div', 'entity_profile vcard');
$this->elementStart('dl', 'entity_depiction');
$this->element('dt', null, _('Photo'));
$this->elementStart('dd');
$this->element('img', array('src' => $avatar,
'class' => 'photo avatar',
'width' => AVATAR_PROFILE_SIZE,
'height' => AVATAR_PROFILE_SIZE,
'alt' => $nickname));
$this->elementEnd('dd');
$this->elementEnd('dl');
$this->elementStart('dl', 'entity_nickname');
$this->element('dt', null, _('Nickname'));
$this->elementStart('dd');
$hasFN = ($fullname !== '') ? 'nickname' : 'fn nickname';
$this->elementStart('a', array('href' => $profile,
'class' => 'url '.$hasFN));
$this->raw($nickname);
$this->elementEnd('a');
$this->elementEnd('dd');
$this->elementEnd('dl');
if (!is_null($fullname)) {
$this->elementStart('dl', 'entity_fn');
$this->elementStart('dd');
$this->elementStart('span', 'fn');
$this->raw($fullname);
$this->elementEnd('span');
$this->elementEnd('dd');
$this->elementEnd('dl');
}
if (!is_null($location)) {
$this->elementStart('dl', 'entity_location');
$this->element('dt', null, _('Location'));
$this->elementStart('dd', 'label');
$this->raw($location);
$this->elementEnd('dd');
$this->elementEnd('dl');
}
if (!is_null($homepage)) {
$this->elementStart('dl', 'entity_url');
$this->element('dt', null, _('URL'));
$this->elementStart('dd');
$this->elementStart('a', array('href' => $homepage,
'class' => 'url'));
$this->raw($homepage);
$this->elementEnd('a');
$this->elementEnd('dd');
$this->elementEnd('dl');
}
if (!is_null($note)) {
$this->elementStart('dl', 'entity_note');
$this->element('dt', null, _('Note'));
$this->elementStart('dd', 'note');
$this->raw($note);
$this->elementEnd('dd');
$this->elementEnd('dl');
}
$this->elementEnd('div');
}
/**
* Redirect on successful remote user subscription
*/
function successUser()
{
$cur = common_current_user();
$url = common_local_url('subscriptions', array('nickname' => $cur->nickname));
common_redirect($url, 303);
}
/**
* Redirect on successful remote group join
*/
function successGroup()
{
$cur = common_current_user();
$url = common_local_url('usergroups', array('nickname' => $cur->nickname));
common_redirect($url, 303);
}
/**
* Pull data for a remote profile and check if it's valid.
* Fills out error UI string in $this->error
* Fills out $this->oprofile on success.
*
* @return boolean
*/
function validateFeed()
{
$profile_uri = trim($this->arg('profile'));
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if ($profile_uri == '') {
$this->showForm(_m('Empty remote profile URL!'));
return;
}
$this->profile_uri = $profile_uri;
// @fixme validate, normalize bla bla
try {
$oprofile = Ostatus_profile::ensureProfile($this->profile_uri);
$this->oprofile = $oprofile;
return true;
} catch (FeedSubBadURLException $e) {
$this->error = _m('Invalid URL or could not reach server.');
} catch (FeedSubBadResponseException $e) {
$this->error = _m('Cannot read feed; server returned error.');
} catch (FeedSubEmptyException $e) {
$this->error = _m('Cannot read feed; server returned an empty page.');
} catch (FeedSubBadHTMLException $e) {
$this->error = _m('Bad HTML, could not find feed link.');
} catch (FeedSubNoFeedException $e) {
$this->error = _m('Could not find a feed linked from this URL.');
} catch (FeedSubUnrecognizedTypeException $e) {
$this->error = _m('Not a recognized feed type.');
} catch (FeedSubException $e) {
// Any new ones we forgot about
$this->error = sprintf(_m('Bad feed URL: %s %s'), get_class($e), $e->getMessage());
}
return false;
}
/**
* Attempt to finalize subscription.
* validateFeed must have been run first.
*
* Calls showForm on failure or successUser/successGroup on success.
*/
function saveFeed()
{
// And subscribe the current user to the local profile
$user = common_current_user();
if ($this->oprofile->isGroup()) {
$group = $this->oprofile->localGroup();
if ($user->isMember($group)) {
$this->showForm(_m('Already a member!'));
} elseif (Group_member::join($this->oprofile->group_id, $user->id)) {
$this->successGroup();
} else {
$this->showForm(_m('Remote group join failed!'));
}
} else {
$local = $this->oprofile->localProfile();
if ($user->isSubscribed($local)) {
$this->showForm(_m('Already subscribed!'));
} elseif ($this->oprofile->subscribeLocalToRemote($user)) {
$this->successUser();
} else {
$this->showForm(_m('Remote subscription failed!'));
}
}
}
function prepare($args)
{
parent::prepare($args);
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if (!common_logged_in()) {
// XXX: selfURL() didn't work. :<
common_set_returnto($_SERVER['REQUEST_URI']);
if (Event::handle('RedirectToLogin', array($this, null))) {
common_redirect(common_local_url('login'), 303);
}
return false;
}
$this->profile_uri = $this->arg('profile');
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return true;
}
/**
* Handle the submission.
*/
function handle($args)
{
parent::handle($args);
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
$this->handlePost();
} else {
if ($this->arg('profile')) {
$this->validateFeed();
}
$this->showForm();
}
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}
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/**
* Handle posts to this form
*
* @return void
*/
function handlePost()
{
// CSRF protection
$token = $this->trimmed('token');
if (!$token || $token != common_session_token()) {
$this->showForm(_('There was a problem with your session token. '.
'Try again, please.'));
return;
}
if ($this->validateFeed()) {
if ($this->arg('submit')) {
$this->saveFeed();
return;
}
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}
$this->showForm();
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}
/**
* Show the appropriate form based on our input state.
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*/
function showForm($err=null)
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{
if ($err) {
$this->error = $err;
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}
if ($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 {
$this->showPage();
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}
}
/**
* Title of the page
*
* @return string Title of the page
*/
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function title()
{
return _m('Authorize subscription');
}
/**
* Instructions for use
*
* @return instructions for use
*/
function getInstructions()
{
return _m('You can subscribe to users from other supported sites. Paste their address or profile URI below:');
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}
function showPageNotice()
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{
if (!empty($this->error)) {
$this->element('p', 'error', $this->error);
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}
}
/**
* Content area of the page
*
* Shows a form for associating a remote OStatus account with this
* StatusNet account.
*
* @return void
*/
function showContent()
{
if ($this->oprofile) {
$this->showPreviewForm();
} else {
$this->showInputForm();
}
}
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function showScripts()
{
parent::showScripts();
$this->autofocus('feedurl');
}
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}