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<?php
// Copyright 1999-2026. WebPros International GmbH. All rights reserved.
namespace Webpros\WptkWpPlugin\WpToolkit\Waf;
use Patchstack\Processor;
use Webpros\WptkWpPlugin\WpToolkit\Common\WordPressHelper;
use Webpros\WptkWpPlugin\WpToolkit\Waf\Extensions\ActiveRulesVulnerabilityMap;
use Webpros\WptkWpPlugin\WpToolkit\Waf\Extensions\HttpRequestExtension;
use Webpros\WptkWpPlugin\WpToolkit\Waf\RulesConverter\PatchstackRuleConverter;
final class FirewallEngine
{
const ENGINE_PATCHSTACK = 'fw-engine';
const OPTION_ACTIVE_RULES = 'wp-toolkit_waf_active_rules';
const OPTION_RULES = 'wp-toolkit_waf_rules';
/**
* @param string[] $vulnerabilityIds
*
* @return void
*/
public static function deleteRules($vulnerabilityIds)
{
$groupedRules = (array)get_option(self::OPTION_RULES, []);
foreach ($vulnerabilityIds as $vulnerabilityId) {
unset($groupedRules[$vulnerabilityId]);
}
self::saveRules($groupedRules);
}
/**
* @return bool
*/
public static function launch($mustUsePluginCall = false)
{
$firewallRules = self::getFirewallRules();
if (\count($firewallRules) === 0) {
return true;
}
$whitelistRules = [];
$settings = [
'mustUsePluginCall' => $mustUsePluginCall,
];
$firewall = new Processor(
new HttpRequestExtension(new ActiveRulesVulnerabilityMap($firewallRules)),
$firewallRules,
$whitelistRules,
$settings
);
return $firewall->launch();
}
/**
* @return string[]
*/
public static function listActiveRules()
{
return \array_keys(self::getFirewallRules());
}
/**
* @param array $rules
*
* @return void
*/
public static function setRules($rules)
{
$groupedRules = self::groupByVulnerabilityId($rules);
self::saveRules($groupedRules);
}
/**
* @param array $rules
*
* @return void
*/
public static function upsertRules($rules)
{
$currentRules = (array)get_option(self::OPTION_RULES, []);
$groupedRules = self::groupByVulnerabilityId($rules);
foreach ($groupedRules as $vulnerabilityId => $vulnerabilityRules) {
$currentRules[$vulnerabilityId] = $vulnerabilityRules;
}
self::saveRules($currentRules);
}
/**
* @param array $rule
*
* @return array
*/
private static function convertRule($rule)
{
switch (self::getPreferredEngine()) {
case self::ENGINE_PATCHSTACK:
return PatchstackRuleConverter::convert($rule);
default:
return $rule;
}
}
/**
* @param array $groupedRules
*
* @return array
*/
private static function filterActiveRules($groupedRules)
{
$activeRules = [];
foreach ($groupedRules as $vulnerabilityId => $rules) {
$filteredRules = self::filterRulesByPreferredEngine($rules);
if (\count($filteredRules) > 0) {
// We use first suitable rule for preferred engine
$rule = \array_shift($filteredRules);
$activeRules[$vulnerabilityId] = self::convertRule($rule);
}
}
return $activeRules;
}
/**
* @param array $rules
*
* @return array
*/
private static function filterRulesByPreferredEngine($rules)
{
return \array_filter(
$rules,
static function ($rule) {
return $rule['engine'] === self::getPreferredEngine();
}
);
}
/**
* @return array
*/
private static function getFirewallRules()
{
return (array)get_option(self::OPTION_ACTIVE_RULES, []);
}
/**
* @return string
*/
private static function getPreferredEngine()
{
return self::ENGINE_PATCHSTACK;
}
/**
* @param array $rules
*
* @return array
*/
private static function groupByVulnerabilityId($rules)
{
return \array_reduce(
$rules,
static function ($groupedRules, $rule) {
$groupedRules[$rule['vulnerabilityId']][] = $rule;
return $groupedRules;
},
[]
);
}
/**
* @param array $groupedRules
*
* @return void
*/
private static function saveRules($groupedRules)
{
WordPressHelper::upsert_option(self::OPTION_RULES, $groupedRules);
WordPressHelper::upsert_option(self::OPTION_ACTIVE_RULES, self::filterActiveRules($groupedRules));
}
}