gnu-social/actions/apisubscriptions.php

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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* Base class for showing subscription information in the API
*
* PHP version 5
*
* LICENCE: 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 API
* @package StatusNet
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* @author Dan Moore <dan@moore.cx>
* @author Evan Prodromou <evan@status.net>
* @author Zach Copley <zach@status.net>
* @copyright 2009 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
exit(1);
}
/**
* This class outputs a list of profiles as Twitter-style user and status objects.
* It is used by the API methods /api/statuses/(friends|followers). To support the
* social graph methods it also can output a simple list of IDs.
*
* @category API
* @package StatusNet
2009-10-13 00:36:00 +01:00
* @author Dan Moore <dan@moore.cx>
* @author Evan Prodromou <evan@status.net>
* @author Zach Copley <zach@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
abstract class ApiSubscriptionsAction extends ApiBareAuthAction
{
var $profiles = null;
var $tag = null;
var $lite = null;
var $ids_only = null;
/**
* Take arguments for running
*
* @param array $args $_REQUEST args
*
* @return boolean success flag
*/
protected function prepare(array $args=array())
{
parent::prepare($args);
$this->tag = $this->arg('tag');
// Note: Twitter no longer supports 'lite'
$this->lite = $this->arg('lite');
$this->ids_only = $this->arg('ids_only');
// If called as a social graph method, show 5000 per page, otherwise 100
$this->count = isset($this->ids_only) ?
5000 : (int)$this->arg('count', 100);
$this->target = $this->getTargetProfile($this->arg('id'));
if (!($this->target instanceof Profile)) {
// TRANS: Client error displayed when requesting a list of followers for a non-existing user.
$this->clientError(_('No such user.'), 404);
}
$this->profiles = $this->getProfiles();
return true;
}
/**
* Handle the request
*
* Show the profiles
*
* @return void
*/
protected function handle()
{
parent::handle();
if (!in_array($this->format, array('xml', 'json'))) {
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// TRANS: Client error displayed when coming across a non-supported API method.
$this->clientError(_('API method not found.'), 404);
}
$this->initDocument($this->format);
if (isset($this->ids_only)) {
$this->showIds();
} else {
$this->showProfiles(isset($this->lite) ? false : true);
}
$this->endDocument($this->format);
}
/**
* Get profiles related to the type of subscriber/subscription action
*
* @return array Profiles
*/
abstract protected function getProfiles();
/**
* Is this action read only?
*
* @param array $args other arguments
*
* @return boolean true
*/
function isReadOnly($args)
{
return true;
}
/**
* When was this feed last modified?
*
* @return string datestamp of the latest profile in the stream
*/
function lastModified()
{
if (!empty($this->profiles) && (count($this->profiles) > 0)) {
return strtotime($this->profiles[0]->created);
}
return null;
}
/**
* An entity tag for this action
*
* Returns an Etag based on the action name, language, user ID, and
* timestamps of the first and last profiles in the subscriptions list
* There's also an indicator to show whether this action is being called
* as /api/statuses/(friends|followers) or /api/(friends|followers)/ids
*
* @return string etag
*/
function etag()
{
if (!empty($this->profiles) && (count($this->profiles) > 0)) {
$last = count($this->profiles) - 1;
return '"' . implode(
':',
array($this->arg('action'),
common_user_cache_hash($this->auth_user),
common_language(),
$this->target->id,
// Caching tags.
isset($this->ids_only) ? 'IDs' : 'Profiles',
strtotime($this->profiles[0]->created),
strtotime($this->profiles[$last]->created))
)
. '"';
}
return null;
}
/**
* Show the profiles as Twitter-style useres and statuses
*
* @param boolean $include_statuses Whether to include the latest status
* with each user. Default true.
*
* @return void
*/
function showProfiles($include_statuses = true)
{
switch ($this->format) {
case 'xml':
$this->elementStart('users', array('type' => 'array',
'xmlns:statusnet' => 'http://status.net/schema/api/1/'));
foreach ($this->profiles as $profile) {
$this->showProfile(
$profile,
$this->format,
null,
$include_statuses
);
}
$this->elementEnd('users');
break;
case 'json':
$arrays = array();
foreach ($this->profiles as $profile) {
$arrays[] = $this->twitterUserArray(
$profile,
$include_statuses
);
}
print json_encode($arrays);
break;
default:
// TRANS: Client error displayed when requesting profiles of followers in an unsupported format.
$this->clientError(_('Unsupported format.'));
break;
}
}
/**
* Show the IDs of the profiles only. 5000 per page. To support
* the 'social graph' methods: /api/(friends|followers)/ids
*
* @return void
*/
function showIds()
{
switch ($this->format) {
case 'xml':
$this->elementStart('ids');
foreach ($this->profiles as $profile) {
$this->element('id', null, $profile->id);
}
$this->elementEnd('ids');
break;
case 'json':
$ids = array();
foreach ($this->profiles as $profile) {
$ids[] = (int)$profile->id;
}
print json_encode($ids);
break;
default:
// TRANS: Client error displayed when requesting IDs of followers in an unsupported format.
$this->clientError(_('Unsupported format.'));
break;
}
}
}