gnu-social/ActivitySpamPlugin.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2011,2012, StatusNet, Inc.
*
* ActivitySpam Plugin
*
* PHP version 5
*
* 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 Spam
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
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* @copyright 2011,2012 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
// This check helps protect against security problems;
// your code file can't be executed directly from the web.
exit(1);
}
/**
* Check new notices with activity spam service.
*
* @category Spam
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
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* @copyright 2011,2012 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class ActivitySpamPlugin extends Plugin
{
public $server = null;
public $username = null;
public $password = null;
/**
* Initializer
*
* @return boolean hook value; true means continue processing, false means stop.
*/
function initialize()
{
foreach (array('username', 'password', 'server') as $attr) {
if (!$this->$attr) {
$this->$attr = common_config('activityspam', $attr);
}
}
return true;
}
/**
* Database schema setup
*
* @see Schema
* @see ColumnDef
*
* @return boolean hook value; true means continue processing, false means stop.
*/
function onCheckSchema()
{
$schema = Schema::get();
$schema->ensureTable('spam_score', Spam_score::schemaDef());
return true;
}
/**
* Load related modules when needed
*
* @param string $cls Name of the class to be loaded
*
* @return boolean hook value; true means continue processing, false means stop.
*/
function onAutoload($cls)
{
$dir = dirname(__FILE__);
switch ($cls)
{
case 'Spam_score':
include_once $dir . '/'.$cls.'.php';
return false;
default:
return true;
}
}
/**
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* When a notice is saved, check its spam score
*
* @param Notice $notice Notice that was just saved
*
* @return boolean hook value; true means continue processing, false means stop.
*/
function onEndNoticeSave($notice)
{
// FIXME: need this to autoload ActivityStreamsMediaLink
$doc = new ActivityStreamJSONDocument();
$activity = $notice->asActivity(null);
$client = new HTTPClient($this->server . "/is-this-spam");
$client->setMethod('POST');
$client->setAuth($this->username, $this->password);
$client->setHeader('Content-Type', 'application/json');
$client->setBody(json_encode($activity->asArray()));
$response = $client->send();
if (!$response->isOK()) {
$this->log(LOG_ERR, "Error " . $response->getStatus() . " checking spam score: " . $response->getBody());
return true;
}
$result = json_decode($response->getBody());
$score = new Spam_score();
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$score->notice_id = $notice->id;
$score->score = $result->probability;
$score->is_spam = $result->isSpam;
$score->scaled = (int) ($result->probability * Spam_score::MAX_SCALED);
$score->created = common_sql_now();
$score->notice_created = $notice->created;
$score->insert();
$this->log(LOG_INFO, "Notice " . $notice->id . " has spam score " . $score->score);
return true;
}
function onPluginVersion(&$versions)
{
$versions[] = array('name' => 'ActivitySpam',
'version' => STATUSNET_VERSION,
'author' => 'Evan Prodromou',
'homepage' => 'http://status.net/wiki/Plugin:ActivitySpam',
'description' =>
_m('Test notices against the Activity Spam service.'));
return true;
}
}