gnu-social/lib/twitter.php

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<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, 2009, 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);
}
define('TWITTER_SERVICE', 1); // Twitter is foreign_service ID 1
function update_twitter_user($twitter_id, $screen_name)
{
$uri = 'http://twitter.com/' . $screen_name;
$fuser = new Foreign_user();
$fuser->query('BEGIN');
// Dropping down to SQL because regular DB_DataObject udpate stuff doesn't seem
// to work so good with tables that have multiple column primary keys
// Any time we update the uri for a forein user we have to make sure there
// are no dupe entries first -- unique constraint on the uri column
$qry = 'UPDATE foreign_user set uri = \'\' WHERE uri = ';
$qry .= '\'' . $uri . '\'' . ' AND service = ' . TWITTER_SERVICE;
$fuser->query($qry);
// Update the user
$qry = 'UPDATE foreign_user SET nickname = ';
$qry .= '\'' . $screen_name . '\'' . ', uri = \'' . $uri . '\' ';
$qry .= 'WHERE id = ' . $twitter_id . ' AND service = ' . TWITTER_SERVICE;
$fuser->query('COMMIT');
$fuser->free();
unset($fuser);
return true;
}
function add_twitter_user($twitter_id, $screen_name)
{
$new_uri = 'http://twitter.com/' . $screen_name;
// Clear out any bad old foreign_users with the new user's legit URL
// This can happen when users move around or fakester accounts get
// repoed, and things like that.
$luser = new Foreign_user();
$luser->uri = $new_uri;
$luser->service = TWITTER_SERVICE;
$result = $luser->delete();
if (empty($result)) {
common_log(LOG_WARNING,
"Twitter bridge - removed invalid Twitter user squatting on uri: $new_uri");
}
$luser->free();
unset($luser);
// Otherwise, create a new Twitter user
$fuser = new Foreign_user();
$fuser->nickname = $screen_name;
$fuser->uri = 'http://twitter.com/' . $screen_name;
$fuser->id = $twitter_id;
$fuser->service = TWITTER_SERVICE;
$fuser->created = common_sql_now();
$result = $fuser->insert();
if (empty($result)) {
common_log(LOG_WARNING,
"Twitter bridge - failed to add new Twitter user: $twitter_id - $screen_name.");
common_log_db_error($fuser, 'INSERT', __FILE__);
} else {
common_debug("Twitter bridge - Added new Twitter user: $screen_name ($twitter_id).");
}
return $result;
}
// Creates or Updates a Twitter user
function save_twitter_user($twitter_id, $screen_name)
{
// Check to see whether the Twitter user is already in the system,
// and update its screen name and uri if so.
$fuser = Foreign_user::getForeignUser($twitter_id, TWITTER_SERVICE);
if (!empty($fuser)) {
$result = true;
// Only update if Twitter screen name has changed
if ($fuser->nickname != $screen_name) {
$result = update_twitter_user($twitter_id, $screen_name);
common_debug('Twitter bridge - Updated nickname (and URI) for Twitter user ' .
"$fuser->id to $screen_name, was $fuser->nickname");
}
return $result;
} else {
return add_twitter_user($twitter_id, $screen_name);
}
$fuser->free();
unset($fuser);
return true;
}
function is_twitter_bound($notice, $flink) {
// Check to see if notice should go to Twitter
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if (!empty($flink) && ($flink->noticesync & FOREIGN_NOTICE_SEND)) {
// If it's not a Twitter-style reply, or if the user WANTS to send replies.
if (!preg_match('/^@[a-zA-Z0-9_]{1,15}\b/u', $notice->content) ||
($flink->noticesync & FOREIGN_NOTICE_SEND_REPLY)) {
return true;
}
}
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return false;
}
function broadcast_twitter($notice)
{
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$flink = Foreign_link::getByUserID($notice->profile_id,
TWITTER_SERVICE);
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if (is_twitter_bound($notice, $flink)) {
$user = $flink->getUser();
// XXX: Hack to get around PHP cURL's use of @ being a a meta character
$statustxt = preg_replace('/^@/', ' @', $notice->content);
$client = new TwitterOAuthClient($flink->token, $flink->credentials);
$status = null;
try {
$status = $client->statuses_update($statustxt);
} catch (OAuthClientCurlException $e) {
if ($e->getMessage() == 'The requested URL returned error: 401') {
$errmsg = sprintf('User %1$s (user id: %2$s) has an invalid ' .
'Twitter OAuth access token.',
$user->nickname, $user->id);
common_log(LOG_WARNING, $errmsg);
// Bad auth token! We need to delete the foreign_link
// to Twitter and inform the user.
remove_twitter_link($flink);
return true;
} else {
// Some other error happened, so we should probably
// try to send again later.
$errmsg = sprintf('cURL error trying to send notice to Twitter ' .
'for user %1$s (user id: %2$s) - ' .
'code: %3$s message: $4$s.',
$user->nickname, $user->id,
$e->getCode(), $e->getMessage());
common_log(LOG_WARNING, $errmsg);
return false;
}
}
if (empty($status)) {
// This could represent a failure posting,
// or the Twitter API might just be behaving flakey.
$errmsg = sprint('No data returned by Twitter API when ' .
'trying to send update for %1$s (user id %2$s).',
$user->nickname, $user->id);
common_log(LOG_WARNING, $errmsg);
return false;
}
// Notice crossed the great divide
$msg = sprintf('Twitter bridge posted notice %s to Twitter.',
$notice->id);
common_log(LOG_INFO, $msg);
}
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return true;
}
function remove_twitter_link($flink)
{
$user = $flink->getUser();
common_log(LOG_INFO, 'Removing Twitter bridge Foreign link for ' .
"user $user->nickname (user id: $user->id).");
$result = $flink->delete();
if (empty($result)) {
common_log(LOG_ERR, 'Could not remove Twitter bridge ' .
"Foreign_link for $user->nickname (user id: $user->id)!");
common_log_db_error($flink, 'DELETE', __FILE__);
}
// Notify the user that her Twitter bridge is down
if (isset($user->email)) {
$result = mail_twitter_bridge_removed($user);
if (!$result) {
$msg = 'Unable to send email to notify ' .
"$user->nickname (user id: $user->id) " .
'that their Twitter bridge link was ' .
'removed!';
common_log(LOG_WARNING, $msg);
}
}
}