gnu-social/actions/apilists.php

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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* List existing lists or create a new list.
*
* 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
* @author Shashi Gowda <connect2shashi@gmail.com>
* @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);
}
/**
* Action handler for Twitter list_memeber methods
*
* @category API
* @package StatusNet
* @author Shashi Gowda <connect2shashi@gmail.com>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
* @see ApiBareAuthAction
*/
class ApiListsAction extends ApiBareAuthAction
{
var $lists = null;
var $cursor = 0;
var $next_cursor = 0;
var $prev_cursor = 0;
var $create = false;
/**
* Set the flags for handling the request. List lists created by user if this
* is a GET request, create a new list if it is a POST request.
*
* Takes parameters:
* - user: the user id or nickname
* Parameters for POST request
* - name: name of the new list (the people tag itself)
* - mode: (optional) mode for the new list private/public
* - description: (optional) description for the list
*
* @return boolean success flag
*/
protected function prepare($args)
{
parent::prepare($args);
$this->create = ($_SERVER['REQUEST_METHOD'] == 'POST');
if (!$this->create) {
$this->user = $this->getTargetUser($this->arg('user'));
if (!($user instanceof User)) {
// TRANS: Client error displayed trying to perform an action related to a non-existing user.
$this->clientError(_('No such user.'), 404);
}
$this->target = $user->getProfile();
$this->getLists();
}
return true;
}
/**
* require authentication if it is a write action or user is ambiguous
*
*/
function requiresAuth()
{
return parent::requiresAuth() ||
$this->create || $this->delete;
}
/**
* Handle request:
* Show the lists the user has created if the request method is GET
* Create a new list by diferring to handlePost() if it is POST.
*/
protected function handle()
{
parent::handle();
if($this->create) {
return $this->handlePost();
}
switch($this->format) {
case 'xml':
$this->showXmlLists($this->lists, $this->next_cursor, $this->prev_cursor);
break;
case 'json':
$this->showJsonLists($this->lists, $this->next_cursor, $this->prev_cursor);
break;
default:
$this->clientError(
// TRANS: Client error displayed when coming across a non-supported API method.
_('API method not found.'),
404,
$this->format
);
break;
}
}
/**
* Create a new list
*
* @return boolean success
*/
function handlePost()
{
$name=$this->arg('name');
if(empty($name)) {
// mimick twitter
// TRANS: Client error displayed when trying to create a list without a name.
print _("A list must have a name.");
exit(1);
}
// twitter creates a new list by appending a number to the end
// if the list by the given name already exists
// it makes more sense to return the existing list instead
$private = null;
if ($this->arg('mode') === 'public') {
$private = false;
} else if ($this->arg('mode') === 'private') {
$private = true;
}
$list = Profile_list::ensureTag($this->auth_user->id,
$this->arg('name'),
$this->arg('description'),
$private);
if (empty($list)) {
return false;
}
switch($this->format) {
case 'xml':
$this->showSingleXmlList($list);
break;
case 'json':
$this->showSingleJsonList($list);
break;
default:
// TRANS: Client error displayed when coming across a non-supported API method.
$this->clientError(_('API method not found.'), 404);
}
return true;
}
/**
* Get lists
*/
function getLists()
{
$cursor = (int) $this->arg('cursor', -1);
// twitter fixes count at 20
// there is no argument named count
$count = 20;
$fn = array($this->target, 'getLists');
list($this->lists,
$this->next_cursor,
$this->prev_cursor) = Profile_list::getAtCursor($fn, array($this->auth_user), $cursor, $count);
}
function isReadOnly($args)
{
return false;
}
function lastModified()
{
if (!$this->create && !empty($this->lists) && (count($this->lists) > 0)) {
return strtotime($this->lists[0]->created);
}
return null;
}
/**
* An entity tag for this list of lists
*
* Returns an Etag based on the action name, language, user ID and
* timestamps of the first and last list the user has joined
*
* @return string etag
*/
function etag()
{
if (!$this->create && !empty($this->lists) && (count($this->lists) > 0)) {
$last = count($this->lists) - 1;
return '"' . implode(
':',
array($this->arg('action'),
common_language(),
$this->target->id,
strtotime($this->lists[0]->created),
strtotime($this->lists[$last]->created))
)
. '"';
}
return null;
}
}