gnu-social/plugins/TwitterBridge/twitterstreamreader.php

282 lines
9.0 KiB
PHP
Raw Normal View History

<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* 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 Plugin
* @package StatusNet
* @author Brion Vibber <brion@status.net>
* @copyright 2010 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/
*/
2010-10-05 21:25:28 +01:00
/**
* Base class for reading Twitter's User Streams and Site Streams
* real-time streaming APIs.
*
* Caller can hook event callbacks for various types of messages;
* the data from the stream and some context info will be passed
* on to the callbacks.
*/
abstract class TwitterStreamReader extends JsonStreamReader
{
protected $callbacks = array();
function __construct(TwitterOAuthClient $auth, $baseUrl)
{
$this->baseUrl = $baseUrl;
$this->oauth = $auth;
}
2010-10-05 21:25:28 +01:00
public function connect($method, $params=array())
{
2010-10-05 21:25:28 +01:00
$url = $this->oAuthUrl($this->baseUrl . '/' . $method, $params);
return parent::connect($url);
}
/**
* Sign our target URL with OAuth auth stuff.
*
* @param string $url
* @param array $params
* @return string
*/
2010-10-05 21:25:28 +01:00
protected function oAuthUrl($url, $params=array())
{
// In an ideal world this would be better encapsulated. :)
$request = OAuthRequest::from_consumer_and_token($this->oauth->consumer,
$this->oauth->token, 'GET', $url, $params);
$request->sign_request($this->oauth->sha1_method,
$this->oauth->consumer, $this->oauth->token);
return $request->to_url();
}
2010-10-05 21:25:28 +01:00
/**
2010-10-05 21:25:28 +01:00
* Add an event callback to receive notifications when things come in
* over the wire.
*
* Callbacks should be in the form: function(array $data, array $context)
* where $context may list additional data on some streams, such as the
* user to whom the message should be routed.
*
* Available events:
*
* Messaging:
*
* 'status': $data contains a status update in standard Twitter JSON format.
* $data['user']: sending user in standard Twitter JSON format.
* $data['text']... etc
*
* 'direct_message': $data contains a direct message in standard Twitter JSON format.
* $data['sender']: sending user in standard Twitter JSON format.
* $data['recipient']: receiving user in standard Twitter JSON format.
* $data['text']... etc
*
*
* Out of band events:
*
* 'follow': User has either started following someone, or is being followed.
* $data['source']: following user in standard Twitter JSON format.
* $data['target']: followed user in standard Twitter JSON format.
*
* 'favorite': Someone has favorited a status update.
* $data['source']: user doing the favoriting, in standard Twitter JSON format.
* $data['target']: user whose status was favorited, in standard Twitter JSON format.
* $data['target_object']: the favorited status update in standard Twitter JSON format.
*
* 'unfavorite': Someone has unfavorited a status update.
* $data['source']: user doing the unfavoriting, in standard Twitter JSON format.
* $data['target']: user whose status was unfavorited, in standard Twitter JSON format.
* $data['target_object']: the unfavorited status update in standard Twitter JSON format.
*
*
* Meta information:
*
* 'friends': $data is a list of user IDs of the current user's friends.
*
* 'delete': Advisory that a Twitter status has been deleted; nice clients
* should follow suit.
* $data['id']: ID of status being deleted
* $data['user_id']: ID of its owning user
*
* 'scrub_geo': Advisory that a user is clearing geo data from their status
* stream; nice clients should follow suit.
* $data['user_id']: ID of user
* $data['up_to_status_id']: any notice older than this should be scrubbed.
*
* 'limit': Advisory that tracking has hit a resource limit.
* $data['track']
*
* 'raw': receives the full JSON data for all message types.
*
* @param string $event
* @param callable $callback
*/
public function hookEvent($event, $callback)
{
$this->callbacks[$event][] = $callback;
}
/**
* Call event handler callbacks for the given event.
*
* @param string $event
* @param mixed $arg1 ... one or more params to pass on
*/
2010-10-05 21:25:28 +01:00
protected function fireEvent($event, $arg1)
{
if (array_key_exists($event, $this->callbacks)) {
$args = array_slice(func_get_args(), 1);
foreach ($this->callbacks[$event] as $callback) {
call_user_func_array($callback, $args);
}
}
}
2010-10-05 21:25:28 +01:00
protected function handleJson(array $data)
{
$this->routeMessage($data);
}
2010-10-05 21:25:28 +01:00
abstract protected function routeMessage($data);
/**
* Send the decoded JSON object out to any event listeners.
*
* @param array $data
2010-10-05 21:25:28 +01:00
* @param array $context optional additional context data to pass on
*/
2010-10-05 21:25:28 +01:00
protected function handleMessage(array $data, array $context=array())
{
2010-10-05 21:25:28 +01:00
$this->fireEvent('raw', $data, $context);
2010-10-05 20:42:55 +01:00
if (isset($data['text'])) {
2010-10-05 21:25:28 +01:00
$this->fireEvent('status', $data, $context);
2010-10-05 20:42:55 +01:00
return;
}
if (isset($data['event'])) {
2010-10-05 21:25:28 +01:00
$this->fireEvent($data['event'], $data, $context);
2010-10-05 20:42:55 +01:00
return;
}
2010-10-05 20:42:55 +01:00
$knownMeta = array('friends', 'delete', 'scrubgeo', 'limit', 'direct_message');
foreach ($knownMeta as $key) {
if (isset($data[$key])) {
2010-10-05 21:25:28 +01:00
$this->fireEvent($key, $data[$key], $context);
2010-10-05 20:42:55 +01:00
return;
}
}
}
}
2010-10-05 21:25:28 +01:00
/**
* Multiuser stream listener for Twitter Site Streams API
* http://dev.twitter.com/pages/site_streams
*
* The site streams API allows listening to updates for multiple users.
* Pass in the user IDs to listen to in via followUser() -- note they
* must each have a valid OAuth token for the application ID we're
* connecting as.
*
* You'll need to be connecting with the auth keys for the user who
* owns the application registration.
*
* The user each message is destined for will be passed to event handlers
* in $context['for_user_id'].
*/
class TwitterSiteStream extends TwitterStreamReader
{
protected $userIds;
public function __construct(TwitterOAuthClient $auth, $baseUrl='https://stream.twitter.com')
{
parent::__construct($auth, $baseUrl);
}
public function connect($method='2b/site.json')
{
2010-10-05 21:25:28 +01:00
$params = array();
if ($this->userIds) {
$params['follow'] = implode(',', $this->userIds);
}
return parent::connect($method, $params);
}
2010-10-05 21:25:28 +01:00
/**
* Set the users whose home streams should be pulled.
* They all must have valid oauth tokens for this application.
*
* Must be called before connect().
*
* @param array $userIds
*/
function followUsers($userIds)
{
$this->userIds = $userIds;
}
/**
* Each message in the site stream tells us which user ID it should be
* routed to; we'll need that to let the caller know what to do.
*
* @param array $data
*/
function routeMessage($data)
{
2010-10-05 21:25:28 +01:00
$context = array(
'source' => 'sitestream',
'for_user' => $data['for_user']
);
parent::handleMessage($data['message'], $context);
}
}
2010-10-05 21:25:28 +01:00
/**
* Stream listener for Twitter User Streams API
* http://dev.twitter.com/pages/user_streams
*
* This will pull the home stream and additional events just for the user
* we've authenticated as.
*/
class TwitterUserStream extends TwitterStreamReader
{
public function __construct(TwitterOAuthClient $auth, $baseUrl='https://userstream.twitter.com')
{
parent::__construct($auth, $baseUrl);
}
public function connect($method='2/user.json')
{
return parent::connect($method);
}
/**
* Each message in the user stream is just ready to go.
*
* @param array $data
*/
function routeMessage($data)
{
2010-10-05 21:25:28 +01:00
$context = array(
'source' => 'userstream'
);
parent::handleMessage($data, $context);
}
}