gnu-social/plugins/Blacklist/BlacklistPlugin.php

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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>
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* @copyright 2010 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('GNUSOCIAL')) { 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
{
const PLUGIN_VERSION = '2.0.0';
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public $nicknames = array();
public $urls = array();
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public $canAdmin = true;
function _getNicknamePatterns()
{
$confNicknames = $this->_configArray('blacklist', 'nicknames');
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$dbNicknames = Nickname_blacklist::getPatterns();
return array_merge($this->nicknames,
$confNicknames,
$dbNicknames);
}
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function _getUrlPatterns()
{
$confURLs = $this->_configArray('blacklist', 'urls');
$dbURLs = Homepage_blacklist::getPatterns();
return array_merge($this->urls,
$confURLs,
$dbURLs);
}
/**
* Database schema setup
*
* @return boolean hook value
*/
function onCheckSchema()
{
$schema = Schema::get();
// For storing blacklist patterns for nicknames
$schema->ensureTable('nickname_blacklist', Nickname_blacklist::schemaDef());
$schema->ensureTable('homepage_blacklist', Homepage_blacklist::schemaDef());
return true;
}
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/**
* Retrieve an array from configuration
*
* Carefully checks a section.
*
* @param string $section Configuration section
* @param string $setting Configuration setting
*
* @return array configuration values
*/
function _configArray($section, $setting)
{
$config = common_config($section, $setting);
if (empty($config)) {
return array();
} else if (is_array($config)) {
return $config;
} else if (is_string($config)) {
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return explode("\r\n", $config);
} else {
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// TRANS: Exception thrown if the Blacklist plugin configuration is incorrect.
// TRANS: %1$s is a configuration section, %2$s is a configuration setting.
throw new Exception(sprintf(_m('Unknown data type for config %1$s + %2$s.'),$section, $setting));
}
}
/**
* Hook profile update to prevent blacklisted homepages or nicknames
*
* Throws an exception if there's a blacklisted homepage or nickname.
*
* @param ManagedAction $action Action being called (usually register)
*
* @return boolean hook value
*/
function onStartProfileSaveForm(ManagedAction $action)
{
$homepage = strtolower($action->trimmed('homepage'));
if (!empty($homepage)) {
if (!$this->_checkUrl($homepage)) {
// TRANS: Validation failure for URL. %s is the URL.
$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)) {
// TRANS: Validation failure for nickname. %s is the 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 &$notice Notice being saved
*
* @return boolean hook value
*/
public function onStartNoticeSave(&$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)) {
// TRANS: Validation failure for URL. %s is the URL.
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$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)
{
$patterns = $this->_getUrlPatterns();
foreach ($patterns as $pattern) {
if ($pattern != '' && preg_match("/$pattern/", $url)) {
return false;
}
}
return true;
}
public function onUrlBlacklistTest($url)
{
common_debug('Checking URL against blacklist: '._ve($url));
if (!$this->_checkUrl($url)) {
throw new ClientException('Forbidden URL', 403);
}
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)
{
$patterns = $this->_getNicknamePatterns();
foreach ($patterns as $pattern) {
if ($pattern != '' && preg_match("/$pattern/", $nickname)) {
return false;
}
}
return true;
}
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/**
* Add our actions to the URL router
*
* @param URLMapper $m URL mapper for this hit
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*
* @return boolean hook return
*/
public function onRouterInitialized(URLMapper $m)
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{
$m->connect('panel/blacklist', array('action' => 'blacklistadminpanel'));
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return true;
}
/**
* Plugin version data
*
* @param array &$versions array of version blocks
*
* @return boolean hook value
*/
function onPluginVersion(array &$versions)
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{
$versions[] = array('name' => 'Blacklist',
'version' => self::PLUGIN_VERSION,
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'author' => 'Evan Prodromou',
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'homepage' =>
'https://git.gnu.io/gnu/gnu-social/tree/master/plugins/Blacklist',
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'description' =>
// TRANS: Plugin description.
_m('Keeps a blacklist of forbidden nickname '.
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'and URL patterns.'));
return true;
}
/**
* Determines if our admin panel can be shown
*
* @param string $name name of the admin panel
* @param boolean &$isOK result
*
* @return boolean hook value
*/
function onAdminPanelCheck($name, &$isOK)
{
if ($name == 'blacklist') {
$isOK = $this->canAdmin;
return false;
}
return true;
}
/**
* Add our tab to the admin panel
*
* @param Widget $nav Admin panel nav
*
* @return boolean hook value
*/
function onEndAdminPanelNav(Menu $nav)
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{
if (AdminPanelAction::canAdmin('blacklist')) {
$action_name = $nav->action->trimmed('action');
$nav->out->menuItem(common_local_url('blacklistadminpanel'),
// TRANS: Menu item in admin panel.
_m('MENU','Blacklist'),
// TRANS: Tooltip for menu item in admin panel.
_m('TOOLTIP','Blacklist configuration.'),
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$action_name == 'blacklistadminpanel',
'nav_blacklist_admin_panel');
}
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return true;
}
function onEndDeleteUserForm(HTMLOutputter $out, User $user)
{
$scoped = $out->getScoped();
if ($scoped === null || !$scoped->hasRight(Right::CONFIGURESITE)) {
return true;
}
try {
$profile = $user->getProfile();
} catch (UserNoProfileException $e) {
return true;
}
$out->elementStart('ul', 'form_data');
$out->elementStart('li');
$this->checkboxAndText($out,
'blacklistnickname',
// TRANS: Checkbox label in the blacklist user form.
_m('Add this nickname pattern to blacklist'),
'blacklistnicknamepattern',
$this->patternizeNickname($profile->getNickname()));
$out->elementEnd('li');
if (!empty($profile->getHomepage())) {
$out->elementStart('li');
$this->checkboxAndText($out,
'blacklisthomepage',
// TRANS: Checkbox label in the blacklist user form.
_m('Add this homepage pattern to blacklist'),
'blacklisthomepagepattern',
$this->patternizeHomepage($profile->getHomepage()));
$out->elementEnd('li');
}
$out->elementEnd('ul');
}
function onEndDeleteUser(HTMLOutputter $out, User $user)
{
if ($out->boolean('blacklisthomepage')) {
$pattern = $out->trimmed('blacklisthomepagepattern');
Homepage_blacklist::ensurePattern($pattern);
}
if ($out->boolean('blacklistnickname')) {
$pattern = $out->trimmed('blacklistnicknamepattern');
Nickname_blacklist::ensurePattern($pattern);
}
return true;
}
function checkboxAndText(HTMLOutputter $out, $checkID, $label, $textID, $value)
{
$out->element('input', array('name' => $checkID,
'type' => 'checkbox',
'class' => 'checkbox',
'id' => $checkID));
$out->text(' ');
$out->element('label', array('class' => 'checkbox',
'for' => $checkID),
$label);
$out->text(' ');
$out->element('input', array('name' => $textID,
'type' => 'text',
'id' => $textID,
'value' => $value));
}
function patternizeNickname($nickname)
{
return $nickname;
}
function patternizeHomepage($homepage)
{
$hostname = parse_url($homepage, PHP_URL_HOST);
return $hostname;
}
function onStartHandleFeedEntry($activity)
{
return $this->_checkActivity($activity);
}
function onStartHandleSalmon($activity)
{
return $this->_checkActivity($activity);
}
function _checkActivity($activity)
{
$actor = $activity->actor;
if (empty($actor)) {
return true;
}
$homepage = strtolower($actor->link);
if (!empty($homepage)) {
if (!$this->_checkUrl($homepage)) {
// TRANS: Exception thrown trying to post a notice while having set a blocked homepage URL. %s is the blocked URL.
$msg = sprintf(_m("Users from \"%s\" are blocked."),
$homepage);
throw new ClientException($msg);
}
}
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if (!empty($actor->poco)) {
$nickname = strtolower($actor->poco->preferredUsername);
if (!empty($nickname)) {
if (!$this->_checkNickname($nickname)) {
// TRANS: Exception thrown trying to post a notice while having a blocked nickname. %s is the blocked nickname.
$msg = sprintf(_m("Notices from nickname \"%s\" are disallowed."),
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$nickname);
throw new ClientException($msg);
}
}
}
return true;
}
/**
* Check URLs and homepages for blacklisted users.
*/
function onStartSubscribe(Profile $subscriber, Profile $other)
{
foreach ([$other->getUrl(), $other->getHomepage()] as $url) {
if (empty($url)) {
continue;
}
$url = strtolower($url);
if (!$this->_checkUrl($url)) {
// TRANS: Client exception thrown trying to subscribe to a person with a blocked homepage or site URL. %s is the blocked URL.
$msg = sprintf(_m("Users from \"%s\" are blocked."),
$url);
throw new ClientException($msg);
}
}
$nickname = $other->getNickname();
if (!empty($nickname)) {
if (!$this->_checkNickname($nickname)) {
// TRANS: Client exception thrown trying to subscribe to a person with a blocked nickname. %s is the blocked nickname.
$msg = sprintf(_m("Cannot subscribe to nickname \"%s\"."),
$nickname);
throw new ClientException($msg);
}
}
return true;
}
}