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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* Plugin to prevent use of nicknames or URLs on a blacklist
*
* PHP version 5
*
* LICENCE: 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 Action
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2009 StatusNet Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
exit(1);
}
/**
* Plugin to prevent use of nicknames or URLs on a blacklist
*
* @category Plugin
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
class BlacklistPlugin extends Plugin
{
public $nicknames = array();
public $urls = array();
/**
* Hook registration to prevent blacklisted homepages or nicknames
*
* Throws an exception if there's a blacklisted homepage or nickname.
*
* @param Action $action Action being called (usually register)
*
* @return boolean hook value
*/
function onStartRegistrationTry($action)
{
$homepage = strtolower($action->trimmed('homepage'));
if (!empty($homepage)) {
if (!$this->_checkUrl($homepage)) {
$msg = sprintf(_m("You may not register with homepage '%s'"),
$homepage);
throw new ClientException($msg);
}
}
$nickname = strtolower($action->trimmed('nickname'));
if (!empty($nickname)) {
if (!$this->_checkNickname($nickname)) {
$msg = sprintf(_m("You may not register with nickname '%s'"),
$nickname);
throw new ClientException($msg);
}
}
return true;
}
/**
* Hook profile update to prevent blacklisted homepages or nicknames
*
* Throws an exception if there's a blacklisted homepage or nickname.
*
* @param Action $action Action being called (usually register)
*
* @return boolean hook value
*/
function onStartProfileSaveForm($action)
{
$homepage = strtolower($action->trimmed('homepage'));
if (!empty($homepage)) {
if (!$this->_checkUrl($homepage)) {
$msg = sprintf(_m("You may not use homepage '%s'"),
$homepage);
throw new ClientException($msg);
}
}
$nickname = strtolower($action->trimmed('nickname'));
if (!empty($nickname)) {
if (!$this->_checkNickname($nickname)) {
$msg = sprintf(_m("You may not use nickname '%s'"),
$nickname);
throw new ClientException($msg);
}
}
return true;
}
/**
* Hook notice save to prevent blacklisted urls
*
* Throws an exception if there's a blacklisted url in the content.
*
* @param Notice &$notice Notice being saved
*
* @return boolean hook value
*/
function onStartNoticeSave(&$notice)
{
common_replace_urls_callback($notice->content,
array($this, 'checkNoticeUrl'));
return true;
}
/**
* Helper callback for notice save
*
* Throws an exception if there's a blacklisted url in the content.
*
* @param string $url URL in the notice content
*
* @return boolean hook value
*/
function checkNoticeUrl($url)
{
// It comes in special'd, so we unspecial it
// before comparing against patterns
$url = htmlspecialchars_decode($url);
if (!$this->_checkUrl($url)) {
$msg = sprintf(_m("You may not use url '%s' in notices"),
$url);
throw new ClientException($msg);
}
return $url;
}
/**
* Helper for checking URLs
*
* Checks an URL against our patterns for a match.
*
* @param string $url URL to check
*
* @return boolean true means it's OK, false means it's bad
*/
private function _checkUrl($url)
{
foreach ($this->urls as $pattern) {
if (preg_match("/$pattern/", $url)) {
return false;
}
}
return true;
}
/**
* Helper for checking nicknames
*
* Checks a nickname against our patterns for a match.
*
* @param string $nickname nickname to check
*
* @return boolean true means it's OK, false means it's bad
*/
private function _checkNickname($nickname)
{
foreach ($this->nicknames as $pattern) {
if (preg_match("/$pattern/", $nickname)) {
return false;
}
}
return true;
}
}
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