gnu-social/actions/atompubshowsubscription.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2010, StatusNet, Inc.
*
* Single subscription
*
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* PHP version 5
*
* 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 AtomPub
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2010 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
if (!defined('GNUSOCIAL') && !defined('STATUSNET')) { exit(1); }
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/**
* Show a single subscription
*
* @category AtomPub
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2010 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class AtompubshowsubscriptionAction extends AtompubAction
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{
private $_subscriber = null;
private $_subscribed = null;
private $_subscription = null;
protected function atompubPrepare()
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{
$subscriberId = $this->trimmed('subscriber');
$this->_subscriber = Profile::getKV('id', $subscriberId);
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if (!$this->_subscriber instanceof Profile) {
// TRANS: Client exception thrown when trying to display a subscription for a non-existing profile ID.
// TRANS: %d is the non-existing profile ID number.
throw new ClientException(sprintf(_('No such profile id: %d.'),
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$subscriberId), 404);
}
$subscribedId = $this->trimmed('subscribed');
$this->_subscribed = Profile::getKV('id', $subscribedId);
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if (!$this->_subscribed instanceof Profile) {
// TRANS: Client exception thrown when trying to display a subscription for a non-existing profile ID.
// TRANS: %d is the non-existing profile ID number.
throw new ClientException(sprintf(_('No such profile id: %d.'),
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$subscribedId), 404);
}
$this->_subscription = Subscription::pkeyGet(array('subscriber' => $subscriberId,
'subscribed' => $subscribedId));
if (!$this->_subscription instanceof Subscription) {
// TRANS: Client exception thrown when trying to display a subscription for a non-subscribed profile ID.
// TRANS: %1$d is the non-existing subscriber ID number, $2$d is the ID of the profile that was not subscribed to.
$msg = sprintf(_('Profile %1$d not subscribed to profile %2$d.'),
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$subscriberId, $subscribedId);
throw new ClientException($msg, 404);
}
return true;
}
protected function handleGet()
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{
$this->showSubscription();
}
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protected function handleDelete()
{
$this->deleteSubscription();
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}
/**
* Show the subscription in ActivityStreams Atom format.
*
* @return void
*/
function showSubscription()
{
$activity = $this->_subscription->asActivity();
header('Content-Type: application/atom+xml; charset=utf-8');
$this->startXML();
$this->raw($activity->asString(true, true, true));
$this->endXML();
}
/**
* Delete the subscription
*
* @return void
*/
function deleteSubscription()
{
if (!$this->scoped instanceof Profile ||
$this->scoped->id != $this->_subscriber->id) {
// TRANS: Client exception thrown when trying to delete a subscription of another user.
throw new ClientException(_("Cannot delete someone else's subscription."), 403);
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}
Subscription::cancel($this->_subscriber, $this->_subscribed);
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}
/**
* Is this action read only?
*
* @param array $args other arguments
*
* @return boolean true
*/
function isReadOnly($args)
{
if ($_SERVER['REQUEST_METHOD'] == 'DELETE') {
return false;
}
return true;
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}
/**
* Return last modified, if applicable.
*
* @return string last modified http header
*/
function lastModified()
{
return max(strtotime($this->_subscriber->modified),
strtotime($this->_subscribed->modified),
strtotime($this->_subscription->modified));
}
/**
* Etag for this object
*
* @return string etag http header
*/
function etag()
{
$mtime = strtotime($this->_subscription->modified);
return 'W/"' . implode(':', array('AtomPubShowSubscription',
$this->_subscriber->id,
$this->_subscribed->id,
$mtime)) . '"';
}
/**
* Does this require authentication?
*
* @return boolean true if delete, else false
*/
function requiresAuth()
{
if ($_SERVER['REQUEST_METHOD'] == 'DELETE') {
return true;
} else {
return false;
}
}
}