gnu-social/lib/twitter.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); }
define('TWITTER_SERVICE', 1); // Twitter is foreign_service ID 1
function get_twitter_data($uri, $screen_name, $password)
{
$options = array(
CURLOPT_USERPWD => sprintf("%s:%s", $screen_name, $password),
CURLOPT_RETURNTRANSFER => true,
CURLOPT_FAILONERROR => true,
CURLOPT_HEADER => false,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_USERAGENT => "Laconica",
CURLOPT_CONNECTTIMEOUT => 120,
CURLOPT_TIMEOUT => 120,
# Twitter is strict about accepting invalid "Expect" headers
CURLOPT_HTTPHEADER => array('Expect:')
);
$ch = curl_init($uri);
curl_setopt_array($ch, $options);
$data = curl_exec($ch);
$errmsg = curl_error($ch);
if ($errmsg) {
common_debug("Twitter bridge - cURL error: $errmsg - trying to load: $uri with user $screen_name.",
__FILE__);
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if (defined('SCRIPT_DEBUG')) {
print "cURL error: $errmsg - trying to load: $uri with user $screen_name.\n";
}
}
curl_close($ch);
return $data;
}
function twitter_json_data($uri, $screen_name, $password)
{
$json_data = get_twitter_data($uri, $screen_name, $password);
if (!$json_data) {
return false;
}
$data = json_decode($json_data);
if (!$data) {
return false;
}
return $data;
}
function twitter_user_info($screen_name, $password)
{
$uri = "http://twitter.com/users/show/$screen_name.json";
return twitter_json_data($uri, $screen_name, $password);
}
function twitter_friends_ids($screen_name, $password)
{
$uri = "http://twitter.com/friends/ids/$screen_name.json";
return twitter_json_data($uri, $screen_name, $password);
}
function update_twitter_user($twitter_id, $screen_name)
{
$uri = 'http://twitter.com/' . $screen_name;
$fuser = new Foreign_user();
$fuser->query('BEGIN');
// Dropping down to SQL because regular db_object 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;
$result = $fuser->query($qry);
if ($result) {
common_debug("Removed uri ($uri) from another foreign_user who was squatting on it.");
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if (defined('SCRIPT_DEBUG')) {
print("Removed uri ($uri) from another Twitter user who was squatting on it.\n");
}
}
// Update the user
$qry = 'UPDATE foreign_user SET nickname = ';
$qry .= '\'' . $screen_name . '\'' . ', uri = \'' . $uri . '\' ';
$qry .= 'WHERE id = ' . $twitter_id . ' AND service = ' . TWITTER_SERVICE;
$result = $fuser->query($qry);
if (!$result) {
common_log(LOG_WARNING,
"Couldn't update foreign_user data for Twitter user: $screen_name");
common_log_db_error($fuser, 'UPDATE', __FILE__);
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if (defined('SCRIPT_DEBUG')) {
print "UPDATE failed: for Twitter user: $twitter_id - $screen_name. - ";
print common_log_objstring($fuser) . "\n";
$error = &PEAR::getStaticProperty('DB_DataObject','lastError');
print "DB_DataObject Error: " . $error->getMessage() . "\n";
}
return false;
}
$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 = $luser->delete();
if ($result) {
common_log(LOG_WARNING,
"Twitter bridge - removed invalid Twitter user squatting on uri: $new_uri");
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if (defined('SCRIPT_DEBUG')) {
print "Removed invalid Twitter user squatting on uri: $new_uri\n";
}
}
$luser->free();
unset($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 = $fuser->insert();
if (!$result) {
common_log(LOG_WARNING,
"Twitter bridge - failed to add new Twitter user: $twitter_id - $screen_name.");
common_log_db_error($fuser, 'INSERT', __FILE__);
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if (defined('SCRIPT_DEBUG')) {
print "INSERT failed: could not add new Twitter user: $twitter_id - $screen_name. - ";
print common_log_objstring($fuser) . "\n";
$error = &PEAR::getStaticProperty('DB_DataObject','lastError');
print "DB_DataObject Error: " . $error->getMessage() . "\n";
}
} else {
common_debug("Twitter bridge - Added new Twitter user: $screen_name ($twitter_id).");
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if (defined('SCRIPT_DEBUG')) {
print "Added new Twitter user: $screen_name ($twitter_id).\n";
}
}
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 ($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 $fuser->nickname");
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if (defined('SCRIPT_DEBUG')) {
print 'Updated nickname (and URI) for Twitter user ' .
"$fuser->id to $screen_name, was $fuser->nickname\n";
}
}
return $result;
} else {
return add_twitter_user($twitter_id, $screen_name);
}
$fuser->free();
unset($fuser);
return true;
}
function retreive_twitter_friends($twitter_id, $screen_name, $password)
{
$friends = array();
$uri = "http://twitter.com/statuses/friends/$twitter_id.json?page=";
$friends_ids = twitter_friends_ids($screen_name, $password);
if (!$friends_ids) {
return $friends;
}
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if (defined('SCRIPT_DEBUG')) {
print "Twitter 'social graph' ids method says $screen_name has " .
count($friends_ids) . " friends.\n";
}
// Calculate how many pages to get...
$pages = ceil(count($friends_ids) / 100);
if ($pages == 0) {
common_log(LOG_WARNING,
"Twitter bridge - $screen_name seems to have no friends.");
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if (defined('SCRIPT_DEBUG')) {
print "$screen_name seems to have no friends.\n";
}
}
for ($i = 1; $i <= $pages; $i++) {
$data = get_twitter_data($uri . $i, $screen_name, $password);
if (!$data) {
common_log(LOG_WARNING,
"Twitter bridge - Couldn't retrieve page $i of $screen_name's friends.");
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if (defined('SCRIPT_DEBUG')) {
print "Couldn't retrieve page $i of $screen_name's friends.\n";
}
continue;
}
$more_friends = json_decode($data);
if (!$more_friends) {
common_log(LOG_WARNING,
"Twitter bridge - No data for page $i of $screen_name's friends.");
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if (defined('SCRIPT_DEBUG')) {
print "No data for page $i of $screen_name's friends.\n";
}
continue;
}
$friends = array_merge($friends, $more_friends);
}
return $friends;
}
function save_twitter_friends($user, $twitter_id, $screen_name, $password)
{
$friends = retreive_twitter_friends($twitter_id, $screen_name, $password);
if (empty($friends)) {
common_debug("Twitter bridge - Couldn't get friends data from Twitter for $screen_name.");
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if (defined('SCRIPT_DEBUG')) {
print "Couldn't get friends data from Twitter for $screen_name.\n";
}
return false;
}
foreach ($friends as $friend) {
$friend_name = $friend->screen_name;
$friend_id = (int) $friend->id;
// Update or create the Foreign_user record
if (!save_twitter_user($friend_id, $friend_name)) {
common_log(LOG_WARNING,
"Twitter bridge - couldn't save $screen_name's friend, $friend_name.");
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if (defined('SCRIPT_DEBUG')) {
print "Couldn't save $screen_name's friend, $friend_name.\n";
}
continue;
}
// Check to see if there's a related local user
$flink = Foreign_link::getByForeignID($friend_id, 1);
if ($flink) {
// Get associated user and subscribe her
$friend_user = User::staticGet('id', $flink->user_id);
if (!empty($friend_user)) {
$result = subs_subscribe_to($user, $friend_user);
if ($result === true) {
common_debug("Twitter bridge - subscribed $friend_user->nickname to $user->nickname.");
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if (defined('SCRIPT_DEBUG')) {
print("Subscribed $friend_user->nickname to $user->nickname.\n");
}
} else {
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if (defined('SCRIPT_DEBUG')) {
print "$result ($friend_user->nickname to $user->nickname)\n";
}
}
}
}
}
return true;
}
function is_twitter_bound($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)
{
$success = true;
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$flink = Foreign_link::getByUserID($notice->profile_id,
TWITTER_SERVICE);
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// XXX: Not sure WHERE to check whether a notice should go to
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// Twitter. Should we even put in the queue if it shouldn't? --Zach
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if (!is_null($flink) && is_twitter_bound($notice, $flink)) {
$fuser = $flink->getForeignUser();
$twitter_user = $fuser->nickname;
$twitter_password = $flink->credentials;
$uri = 'http://www.twitter.com/statuses/update.json';
// XXX: Hack to get around PHP cURL's use of @ being a a meta character
$statustxt = preg_replace('/^@/', ' @', $notice->content);
$options = array(
CURLOPT_USERPWD => "$twitter_user:$twitter_password",
CURLOPT_POST => true,
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CURLOPT_POSTFIELDS =>
array(
'status' => $statustxt,
'source' => common_config('integration', 'source')
),
CURLOPT_RETURNTRANSFER => true,
CURLOPT_FAILONERROR => true,
CURLOPT_HEADER => false,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_USERAGENT => "Laconica",
CURLOPT_CONNECTTIMEOUT => 120, // XXX: How long should this be?
CURLOPT_TIMEOUT => 120,
# Twitter is strict about accepting invalid "Expect" headers
CURLOPT_HTTPHEADER => array('Expect:')
);
$ch = curl_init($uri);
curl_setopt_array($ch, $options);
$data = curl_exec($ch);
$errmsg = curl_error($ch);
if ($errmsg) {
common_debug("cURL error: $errmsg - " .
"trying to send notice for $twitter_user.",
__FILE__);
$success = false;
}
curl_close($ch);
if (!$data) {
common_debug("No data returned by Twitter's " .
"API trying to send update for $twitter_user",
__FILE__);
$success = false;
}
// Twitter should return a status
$status = json_decode($data);
if (!$status->id) {
common_debug("Unexpected data returned by Twitter " .
" API trying to send update for $twitter_user",
__FILE__);
$success = false;
}
}
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return $success;
}