gnu-social/lib/twitterapi.php

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<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, Control Yourself, Inc.
*
* 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/>.
*/
if (!defined('LACONICA')) {
exit(1);
}
class TwitterapiAction extends Action
{
var $auth_user;
/**
* Initialization.
*
* @param array $args Web and URL arguments
*
* @return boolean false if user doesn't exist
*/
function prepare($args)
{
parent::prepare($args);
return true;
}
/**
* Handle a request
*
* @param array $args Arguments from $_REQUEST
*
* @return void
*/
function handle($args)
{
parent::handle($args);
}
/**
* Overrides XMLOutputter::element to write booleans as strings (true|false).
* See that method's documentation for more info.
*
* @param string $tag Element type or tagname
* @param array $attrs Array of element attributes, as
* key-value pairs
* @param string $content string content of the element
*
* @return void
*/
function element($tag, $attrs=null, $content=null)
{
if (is_bool($content)) {
$content = ($content ? 'true' : 'false');
}
return parent::element($tag, $attrs, $content);
}
function twitter_user_array($profile, $get_notice=false)
{
$twitter_user = array();
$twitter_user['id'] = intval($profile->id);
$twitter_user['name'] = $profile->getBestName();
$twitter_user['screen_name'] = $profile->nickname;
$twitter_user['location'] = ($profile->location) ? $profile->location : null;
$twitter_user['description'] = ($profile->bio) ? $profile->bio : null;
$avatar = $profile->getAvatar(AVATAR_STREAM_SIZE);
$twitter_user['profile_image_url'] = ($avatar) ? $avatar->displayUrl() :
Avatar::defaultImage(AVATAR_STREAM_SIZE);
$twitter_user['url'] = ($profile->homepage) ? $profile->homepage : null;
$twitter_user['protected'] = false; # not supported by Laconica yet
$twitter_user['followers_count'] = $this->count_subscriptions($profile);
// To be supported soon...
$twitter_user['profile_background_color'] = '';
$twitter_user['profile_text_color'] = '';
$twitter_user['profile_link_color'] = '';
$twitter_user['profile_sidebar_fill_color'] = '';
$twitter_user['profile_sidebar_border_color'] = '';
$subbed = DB_DataObject::factory('subscription');
$subbed->subscriber = $profile->id;
$subbed_count = (int) $subbed->count() - 1;
$twitter_user['friends_count'] = (is_int($subbed_count)) ? $subbed_count : 0;
$twitter_user['created_at'] = $this->date_twitter($profile->created);
$faves = DB_DataObject::factory('fave');
$faves->user_id = $user->id;
$faves_count = (int) $faves->count();
$twitter_user['favourites_count'] = $faves_count; // British spelling!
// Need to pull up the user for some of this
$user = User::staticGet($profile->id);
$timezone = 'UTC';
if ($user->timezone) {
$timezone = $user->timezone;
}
$t = new DateTime;
$t->setTimezone(new DateTimeZone($timezone));
$twitter_user['utc_offset'] = $t->format('Z');
$twitter_user['time_zone'] = $timezone;
// To be supported some day, perhaps
$twitter_user['profile_background_image_url'] = '';
$twitter_user['profile_background_tile'] = false;
$notices = DB_DataObject::factory('notice');
$notices->profile_id = $profile->id;
$notice_count = (int) $notices->count();
$twitter_user['statuses_count'] = (is_int($notice_count)) ? $notice_count : 0;
// Is the requesting user following this user?
$twitter_user['following'] = false;
$twitter_user['notifications'] = false;
if (isset($apidata['user'])) {
$twitter_user['following'] = $apidata['user']->isSubscribed($profile);
// Notifications on?
$sub = Subscription::pkeyGet(array('subscriber' =>
$apidata['user']->id, 'subscribed' => $profile->id));
if ($sub) {
$twitter_user['notifications'] = ($sub->jabber || $sub->sms);
}
}
if ($get_notice) {
$notice = $profile->getCurrentNotice();
if ($notice) {
# don't get user!
$twitter_user['status'] = $this->twitter_status_array($notice, false);
}
}
return $twitter_user;
}
function twitter_status_array($notice, $include_user=true)
{
$profile = $notice->getProfile();
$twitter_status = array();
$twitter_status['text'] = $notice->content;
$twitter_status['truncated'] = false; # Not possible on Laconica
$twitter_status['created_at'] = $this->date_twitter($notice->created);
$twitter_status['in_reply_to_status_id'] = ($notice->reply_to) ?
intval($notice->reply_to) : null;
$twitter_status['source'] = $this->source_link($notice->source);
$twitter_status['id'] = intval($notice->id);
$replier_profile = null;
if ($notice->reply_to) {
$reply = Notice::staticGet(intval($notice->reply_to));
if ($reply) {
$replier_profile = $reply->getProfile();
}
}
$twitter_status['in_reply_to_user_id'] =
($replier_profile) ? intval($replier_profile->id) : null;
$twitter_status['in_reply_to_screen_name'] =
($replier_profile) ? $replier_profile->nickname : null;
if (isset($this->auth_user)) {
$twitter_status['favorited'] = $this->auth_user->hasFave($notice);
} else {
$twitter_status['favorited'] = false;
}
if ($include_user) {
# Don't get notice (recursive!)
$twitter_user = $this->twitter_user_array($profile, false);
$twitter_status['user'] = $twitter_user;
}
return $twitter_status;
}
function twitter_rss_entry_array($notice)
{
$profile = $notice->getProfile();
$entry = array();
# We trim() to avoid extraneous whitespace in the output
$entry['content'] = common_xml_safe_str(trim($notice->rendered));
$entry['title'] = $profile->nickname . ': ' . common_xml_safe_str(trim($notice->content));
$entry['link'] = common_local_url('shownotice', array('notice' => $notice->id));
$entry['published'] = common_date_iso8601($notice->created);
$taguribase = common_config('integration', 'taguri');
$entry['id'] = "tag:$taguribase:$entry[link]";
$entry['updated'] = $entry['published'];
$entry['author'] = $profile->getBestName();
# RSS Item specific
$entry['description'] = $entry['content'];
$entry['pubDate'] = common_date_rfc2822($notice->created);
$entry['guid'] = $entry['link'];
return $entry;
}
function twitter_rss_dmsg_array($message)
{
$entry = array();
$entry['title'] = sprintf('Message from %s to %s',
$message->getFrom()->nickname, $message->getTo()->nickname);
$entry['content'] = common_xml_safe_str(trim($message->content));
$entry['link'] = common_local_url('showmessage', array('message' => $message->id));
$entry['published'] = common_date_iso8601($message->created);
$taguribase = common_config('integration', 'taguri');
$entry['id'] = "tag:$taguribase,:$entry[link]";
$entry['updated'] = $entry['published'];
$entry['author'] = $message->getFrom()->getBestName();
# RSS Item specific
$entry['description'] = $entry['content'];
$entry['pubDate'] = common_date_rfc2822($message->created);
$entry['guid'] = $entry['link'];
return $entry;
}
function twitter_dmsg_array($message)
{
$twitter_dm = array();
$from_profile = $message->getFrom();
$to_profile = $message->getTo();
$twitter_dm['id'] = $message->id;
$twitter_dm['sender_id'] = $message->from_profile;
$twitter_dm['text'] = trim($message->content);
$twitter_dm['recipient_id'] = $message->to_profile;
$twitter_dm['created_at'] = $this->date_twitter($message->created);
$twitter_dm['sender_screen_name'] = $from_profile->nickname;
$twitter_dm['recipient_screen_name'] = $to_profile->nickname;
$twitter_dm['sender'] = $this->twitter_user_array($from_profile, false);
$twitter_dm['recipient'] = $this->twitter_user_array($to_profile, false);
return $twitter_dm;
}
function show_twitter_xml_status($twitter_status)
{
$this->elementStart('status');
foreach($twitter_status as $element => $value) {
switch ($element) {
case 'user':
$this->show_twitter_xml_user($twitter_status['user']);
break;
case 'text':
$this->element($element, null, common_xml_safe_str($value));
break;
default:
$this->element($element, null, $value);
}
}
$this->elementEnd('status');
}
function show_twitter_xml_user($twitter_user, $role='user')
{
$this->elementStart($role);
foreach($twitter_user as $element => $value) {
if ($element == 'status') {
$this->show_twitter_xml_status($twitter_user['status']);
} else {
$this->element($element, null, $value);
}
}
$this->elementEnd($role);
}
function show_twitter_rss_item($entry)
{
$this->elementStart('item');
$this->element('title', null, $entry['title']);
$this->element('description', null, $entry['description']);
$this->element('pubDate', null, $entry['pubDate']);
$this->element('guid', null, $entry['guid']);
$this->element('link', null, $entry['link']);
$this->elementEnd('item');
}
function show_json_objects($objects)
{
print(json_encode($objects));
}
function show_single_xml_status($notice)
{
$this->init_document('xml');
$twitter_status = $this->twitter_status_array($notice);
$this->show_twitter_xml_status($twitter_status);
$this->end_document('xml');
}
function show_single_json_status($notice)
{
$this->init_document('json');
$status = $this->twitter_status_array($notice);
$this->show_json_objects($status);
$this->end_document('json');
}
function show_single_xml_dmsg($message)
{
$this->init_document('xml');
$dmsg = $this->twitter_dmsg_array($message);
$this->show_twitter_xml_dmsg($dmsg);
$this->end_document('xml');
}
function show_single_json_dmsg($message)
{
$this->init_document('json');
$dmsg = $this->twitter_dmsg_array($message);
$this->show_json_objects($dmsg);
$this->end_document('json');
}
function show_twitter_xml_dmsg($twitter_dm)
{
$this->elementStart('direct_message');
foreach($twitter_dm as $element => $value) {
switch ($element) {
case 'sender':
case 'recipient':
$this->show_twitter_xml_user($value, $element);
break;
case 'text':
$this->element($element, null, common_xml_safe_str($value));
break;
default:
$this->element($element, null, $value);
}
}
$this->elementEnd('direct_message');
}
function show_xml_timeline($notice)
{
$this->init_document('xml');
$this->elementStart('statuses', array('type' => 'array'));
if (is_array($notice)) {
foreach ($notice as $n) {
$twitter_status = $this->twitter_status_array($n);
$this->show_twitter_xml_status($twitter_status);
}
} else {
while ($notice->fetch()) {
$twitter_status = $this->twitter_status_array($notice);
$this->show_twitter_xml_status($twitter_status);
}
}
$this->elementEnd('statuses');
$this->end_document('xml');
}
function show_rss_timeline($notice, $title, $link, $subtitle, $suplink=null)
{
$this->init_document('rss');
$this->elementStart('channel');
$this->element('title', null, $title);
$this->element('link', null, $link);
if (!is_null($suplink)) {
# For FriendFeed's SUP protocol
$this->element('link', array('xmlns' => 'http://www.w3.org/2005/Atom',
'rel' => 'http://api.friendfeed.com/2008/03#sup',
'href' => $suplink,
'type' => 'application/json'));
}
$this->element('description', null, $subtitle);
$this->element('language', null, 'en-us');
$this->element('ttl', null, '40');
if (is_array($notice)) {
foreach ($notice as $n) {
$entry = $this->twitter_rss_entry_array($n);
$this->show_twitter_rss_item($entry);
}
} else {
while ($notice->fetch()) {
$entry = $this->twitter_rss_entry_array($notice);
$this->show_twitter_rss_item($entry);
}
}
$this->elementEnd('channel');
$this->end_twitter_rss();
}
function show_atom_timeline($notice, $title, $id, $link, $subtitle=null, $suplink=null, $selfuri=null)
{
$this->init_document('atom');
$this->element('title', null, $title);
$this->element('id', null, $id);
$this->element('link', array('href' => $link, 'rel' => 'alternate', 'type' => 'text/html'), null);
if (!is_null($suplink)) {
# For FriendFeed's SUP protocol
$this->element('link', array('rel' => 'http://api.friendfeed.com/2008/03#sup',
'href' => $suplink,
'type' => 'application/json'));
}
if (!is_null($selfuri)) {
$this->element('link', array('href' => $selfuri,
'rel' => 'self', 'type' => 'application/atom+xml'), null);
}
$this->element('updated', null, common_date_iso8601('now'));
$this->element('subtitle', null, $subtitle);
if (is_array($notice)) {
foreach ($notice as $n) {
$this->raw($n->asAtomEntry());
}
} else {
while ($notice->fetch()) {
$this->raw($notice->asAtomEntry());
}
}
$this->end_document('atom');
}
function show_json_timeline($notice)
{
$this->init_document('json');
$statuses = array();
if (is_array($notice)) {
foreach ($notice as $n) {
$twitter_status = $this->twitter_status_array($n);
array_push($statuses, $twitter_status);
}
} else {
while ($notice->fetch()) {
$twitter_status = $this->twitter_status_array($notice);
array_push($statuses, $twitter_status);
}
}
$this->show_json_objects($statuses);
$this->end_document('json');
}
// Anyone know what date format this is?
// Twitter's dates look like this: "Mon Jul 14 23:52:38 +0000 2008" -- Zach
function date_twitter($dt)
{
$t = strtotime($dt);
return date("D M d H:i:s O Y", $t);
}
// XXX: Candidate for a general utility method somewhere?
function count_subscriptions($profile)
{
$count = 0;
$sub = new Subscription();
$sub->subscribed = $profile->id;
$count = $sub->find();
if ($count > 0) {
return $count - 1;
} else {
return 0;
}
}
function init_document($type='xml')
{
switch ($type) {
case 'xml':
header('Content-Type: application/xml; charset=utf-8');
$this->startXML();
break;
case 'json':
header('Content-Type: application/json; charset=utf-8');
// Check for JSONP callback
$callback = $this->arg('callback');
if ($callback) {
print $callback . '(';
}
break;
case 'rss':
header("Content-Type: application/rss+xml; charset=utf-8");
$this->init_twitter_rss();
break;
case 'atom':
header('Content-Type: application/atom+xml; charset=utf-8');
$this->init_twitter_atom();
break;
default:
$this->clientError(_('Not a supported data format.'));
break;
}
return;
}
function end_document($type='xml')
{
switch ($type) {
case 'xml':
$this->endXML();
break;
case 'json':
// Check for JSONP callback
$callback = $this->arg('callback');
if ($callback) {
print ')';
}
break;
case 'rss':
$this->end_twitter_rss();
break;
case 'atom':
$this->end_twitter_rss();
break;
default:
$this->clientError(_('Not a supported data format.'));
break;
}
return;
}
function clientError($msg, $code = 400, $content_type = 'json')
{
static $status = array(400 => 'Bad Request',
401 => 'Unauthorized',
402 => 'Payment Required',
403 => 'Forbidden',
404 => 'Not Found',
405 => 'Method Not Allowed',
406 => 'Not Acceptable',
407 => 'Proxy Authentication Required',
408 => 'Request Timeout',
409 => 'Conflict',
410 => 'Gone',
411 => 'Length Required',
412 => 'Precondition Failed',
413 => 'Request Entity Too Large',
414 => 'Request-URI Too Long',
415 => 'Unsupported Media Type',
416 => 'Requested Range Not Satisfiable',
417 => 'Expectation Failed');
$action = $this->trimmed('action');
common_debug("User error '$code' on '$action': $msg", __FILE__);
if (!array_key_exists($code, $status)) {
$code = 400;
}
$status_string = $status[$code];
header('HTTP/1.1 '.$code.' '.$status_string);
if ($content_type == 'xml') {
$this->init_document('xml');
$this->elementStart('hash');
$this->element('error', null, $msg);
$this->element('request', null, $_SERVER['REQUEST_URI']);
$this->elementEnd('hash');
$this->end_document('xml');
} else {
$this->init_document('json');
$error_array = array('error' => $msg, 'request' => $_SERVER['REQUEST_URI']);
print(json_encode($error_array));
$this->end_document('json');
}
}
function init_twitter_rss()
{
$this->startXML();
$this->elementStart('rss', array('version' => '2.0'));
}
function end_twitter_rss()
{
$this->elementEnd('rss');
$this->endXML();
}
function init_twitter_atom()
{
$this->startXML();
// FIXME: don't hardcode the language here!
$this->elementStart('feed', array('xmlns' => 'http://www.w3.org/2005/Atom',
'xml:lang' => 'en-US',
'xmlns:thr' => 'http://purl.org/syndication/thread/1.0'));
}
function end_twitter_atom()
{
$this->elementEnd('feed');
$this->endXML();
}
function show_profile($profile, $content_type='xml', $notice=null)
{
$profile_array = $this->twitter_user_array($profile, true);
switch ($content_type) {
case 'xml':
$this->show_twitter_xml_user($profile_array);
break;
case 'json':
$this->show_json_objects($profile_array);
break;
default:
$this->clientError(_('Not a supported data format.'));
return;
}
return;
}
function get_user($id, $apidata=null)
{
if (empty($id)) {
// Twitter supports these other ways of passing the user ID
if (is_numeric($this->arg('id'))) {
return User::staticGet($this->arg('id'));
} else if ($this->arg('id')) {
$nickname = common_canonical_nickname($this->arg('id'));
return User::staticGet('nickname', $nickname);
} else if ($this->arg('user_id')) {
// This is to ensure that a non-numeric user_id still
// overrides screen_name even if it doesn't get used
if (is_numeric($this->arg('user_id'))) {
return User::staticGet('id', $this->arg('user_id'));
}
} else if ($this->arg('screen_name')) {
$nickname = common_canonical_nickname($this->arg('screen_name'));
return User::staticGet('nickname', $nickname);
} else {
// Fall back to trying the currently authenticated user
return $apidata['user'];
}
} else if (is_numeric($id)) {
return User::staticGet($id);
} else {
$nickname = common_canonical_nickname($id);
return User::staticGet('nickname', $nickname);
}
}
function get_profile($id)
{
if (is_numeric($id)) {
return Profile::staticGet($id);
} else {
$user = User::staticGet('nickname', $id);
if ($user) {
return $user->getProfile();
} else {
return null;
}
}
}
function source_link($source)
{
$source_name = _($source);
switch ($source) {
case 'web':
case 'xmpp':
case 'mail':
case 'omb':
case 'api':
break;
default:
$ns = Notice_source::staticGet($source);
if ($ns) {
$source_name = '<a href="' . $ns->url . '">' . $ns->name . '</a>';
}
break;
}
return $source_name;
}
/**
* Returns query argument or default value if not found. Certain
* parameters used throughout the API are lightly scrubbed and
* bounds checked. This overrides Action::arg().
*
* @param string $key requested argument
* @param string $def default value to return if $key is not provided
*
* @return var $var
*/
function arg($key, $def=null)
{
// XXX: Do even more input validation/scrubbing?
if (array_key_exists($key, $this->args)) {
switch($key) {
case 'page':
$page = (int)$this->args['page'];
return ($page < 1) ? 1 : $page;
case 'count':
$count = (int)$this->args['count'];
if ($count < 1) {
return 20;
} elseif ($count > 200) {
return 200;
} else {
return $count;
}
case 'since_id':
$since_id = (int)$this->args['since_id'];
return ($since_id < 1) ? 0 : $since_id;
case 'max_id':
$max_id = (int)$this->args['max_id'];
return ($max_id < 1) ? 0 : $max_id;
case 'since':
return strtotime($this->args['since']);
default:
return parent::arg($key, $def);
}
} else {
return $def;
}
}
}