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;
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public $hideSpam = false;
const REVIEWSPAM = 'ActivitySpamPlugin::REVIEWSPAM';
const TRAINSPAM = 'ActivitySpamPlugin::TRAINSPAM';
/**
* Initializer
*
* @return boolean hook value; true means continue processing, false means stop.
*/
function initialize()
{
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$this->filter = new SpamFilter(common_config('activityspam', 'server'),
common_config('activityspam', 'consumerkey'),
common_config('activityspam', 'secret'));
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$this->hideSpam = common_config('activityspam', 'hidespam');
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());
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Spam_score::upgrade();
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 'TrainAction':
case 'SpamAction':
include_once $dir . '/' . strtolower(mb_substr($cls, 0, -6)) . '.php';
return false;
case 'Spam_score':
include_once $dir . '/'.$cls.'.php';
return false;
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case 'SpamFilter':
case 'SpamNoticeStream':
case 'TrainSpamForm':
case 'TrainHamForm':
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include_once $dir . '/'.strtolower($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)
{
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try {
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$result = $this->filter->test($notice);
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$score = Spam_score::saveNew($notice, $result);
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$this->log(LOG_INFO, "Notice " . $notice->id . " has spam score " . $score->score);
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} catch (Exception $e) {
// Log but continue
$this->log(LOG_ERR, $e->getMessage());
}
return true;
}
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function onNoticeDeleteRelated($notice) {
$score = Spam_score::staticGet('notice_id', $notice->id);
if (!empty($score)) {
$score->delete();
}
return true;
}
function onUserRightsCheck($profile, $right, &$result) {
switch ($right) {
case self::REVIEWSPAM:
case self::TRAINSPAM:
$result = ($profile->hasRole(Profile_role::MODERATOR) || $profile->hasRole('modhelper'));
return false;
default:
return true;
}
}
function onGetSpamFilter(&$filter) {
$filter = $this->filter;
return false;
}
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function onEndShowNoticeOptionItems($nli)
{
$profile = Profile::current();
if (!empty($profile) && $profile->hasRight(self::TRAINSPAM)) {
$notice = $nli->getNotice();
$out = $nli->getOut();
if (!empty($notice)) {
$score = $this->getScore($notice);
if (empty($score)) {
$this->debug("No score for notice " . $notice->id);
// XXX: show a question-mark or something
} else if ($score->is_spam) {
$form = new TrainHamForm($out, $notice);
$form->show();
} else if (!$score->is_spam) {
$form = new TrainSpamForm($out, $notice);
$form->show();
}
}
}
return true;
}
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/**
* Map URLs to actions
*
* @param Net_URL_Mapper $m path-to-action mapper
*
* @return boolean hook value; true means continue processing, false means stop.
*/
function onRouterInitialized($m)
{
$m->connect('main/train/spam',
array('action' => 'train', 'category' => 'spam'));
$m->connect('main/train/ham',
array('action' => 'train', 'category' => 'ham'));
$m->connect('main/spam',
array('action' => 'spam'));
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return true;
}
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function onEndShowStyles($action)
{
$action->element('style', null,
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'.form-train-spam input.submit { background: url('.$this->path('icons/bullet_black.png').') no-repeat 0px 0px } ' . "\n" .
'.form-train-ham input.submit { background: url('.$this->path('icons/exclamation.png').') no-repeat 0px 0px } ');
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return true;
}
function onEndPublicGroupNav($nav)
{
$user = common_current_user();
if (!empty($user) && $user->hasRight(self::REVIEWSPAM)) {
$nav->out->menuItem(common_local_url('spam'),
_m('MENU','Spam'),
// TRANS: Menu item title in search group navigation panel.
_('Notices marked as spam'),
$nav->actionName == 'spam',
'nav_timeline_spam');
}
return true;
}
function onPluginVersion(&$versions)
{
$versions[] = array('name' => 'ActivitySpam',
'version' => STATUSNET_VERSION,
'author' => 'Evan Prodromou',
'homepage' => 'http://status.net/wiki/Plugin:ActivitySpam',
'description' =>
_m('Test notices against the Activity Spam service.'));
return true;
}
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function getScore($notice)
{
$score = Spam_score::staticGet('notice_id', $notice->id);
if (!empty($score)) {
return $score;
}
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try {
$result = $this->filter->test($notice);
$score = Spam_score::saveNew($notice, $result);
$this->log(LOG_INFO, "Notice " . $notice->id . " has spam score " . $score->score);
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} catch (Exception $e) {
// Log but continue
$this->log(LOG_ERR, $e->getMessage());
$score = null;
}
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return $score;
}
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function onStartReadWriteTables(&$alwaysRW, &$rwdb) {
$alwaysRW[] = 'spam_score';
return true;
}
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function onEndNoticeInScope($notice, $profile, &$bResult)
{
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if ($this->hideSpam) {
if ($bResult) {
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$score = $this->getScore($notice);
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if ($score->is_spam) {
if (empty($profile) ||
($profile->id !== $notice->profile_id &&
!$profile->hasRight(self::REVIEWSPAM))) {
$bResult = false;
}
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}
}
}
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return true;
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}
}