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N°4789 - compute boolean expressions

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odain
2025-08-25 18:51:56 +02:00
parent 788b23a485
commit 8af748bd3e
2 changed files with 374 additions and 31 deletions
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146
setup/modulediscovery/ModuleDiscoveryService.php
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@@ -79,6 +79,17 @@ class ModuleDiscoveryService {
return $aModuleInfo;
}
/**
* @param string $sPhpContent
*
* @return \PhpParser\Node\Stmt[]|null
*/
public function parsePhpCode(string $sPhpContent): ?array
{
$oParser = (new ParserFactory())->createForNewestSupportedVersion();
return $oParser->parse($sPhpContent);
}
/**
* Read the information from a module file (module.xxx.php)
* Closely inspired (almost copied/pasted !!) from ModuleDiscovery::ListModuleFiles
@@ -90,8 +101,7 @@ class ModuleDiscoveryService {
{
try
{
$oParser = (new ParserFactory())->createForNewestSupportedVersion();
$aNodes = $oParser->parse(file_get_contents($sModuleFilePath));
$aNodes = $this->parsePhpCode(file_get_contents($sModuleFilePath));
}
catch (PhpParser\Error $e) {
throw new \ModuleDiscoveryServiceException($e->getMessage(), 0, $e, $sModuleFilePath);
@@ -124,24 +134,6 @@ class ModuleDiscoveryService {
throw new ModuleDiscoveryServiceException("No proper call to SetupWebPage::AddModule found in module file", 0, null, $sModuleFilePath);
}
/**
* @param string $sBooleanExpr
*
* @return bool
* @throws ModuleDiscoveryServiceException
*/
public function ComputeBooleanExpression(string $sBooleanExpr) : bool
{
$bResult = false;
try{
@eval('$bResult = '.$sBooleanExpr.';');
} catch (Throwable $t) {
throw new ModuleDiscoveryServiceException("Eval of '$sBooleanExpr' caused an error: ".$t->getMessage());
}
return $bResult;
}
private function BrowseArrayStructure(PhpParser\Node\Expr\Array_ $oArray, array &$aModuleConfig) : void
{
$iIndex=0;
@@ -242,7 +234,7 @@ class ModuleDiscoveryService {
return [
$sModuleFilePath,
$sModuleId,
$aModuleConfig
$aModuleConfig,
];
}
@@ -268,20 +260,27 @@ class ModuleDiscoveryService {
return null;
}
foreach ($oNode->elseifs as $oElseIfSubNode) {
/** @var \PhpParser\Node\Stmt\ElseIf_ $oElseIfSubNode*/
$bCondition = $this->EvaluateBooleanExpression($oElseIfSubNode->cond);
if($bCondition){
$aModuleConfig = $this->ParseStatementsAndReturnModuleConfiguration($sModuleFilePath, $oNode->stmts);
if (!is_null($aModuleConfig)) {
return $aModuleConfig;
if (! is_null($oNode->elseifs)) {
foreach ($oNode->elseifs as $oElseIfSubNode) {
/** @var \PhpParser\Node\Stmt\ElseIf_ $oElseIfSubNode */
$bCondition = $this->EvaluateBooleanExpression($oElseIfSubNode->cond);
if ($bCondition) {
$aModuleConfig = $this->ParseStatementsAndReturnModuleConfiguration($sModuleFilePath, $oElseIfSubNode->stmts);
if (!is_null($aModuleConfig)) {
return $aModuleConfig;
}
break;
}
break;
}
}
$aModuleConfig = $this->ParseStatementsAndReturnModuleConfiguration($sModuleFilePath, $oNode->else->stmts);
return $aModuleConfig;
if (! is_null($oNode->else)) {
$aModuleConfig = $this->ParseStatementsAndReturnModuleConfiguration($sModuleFilePath, $oNode->else->stmts);
return $aModuleConfig;
}
return null;
}
@@ -311,11 +310,96 @@ class ModuleDiscoveryService {
return $bResult;
}
private function GetMixedValueForBooleanOperatorEvaluation(\PhpParser\Node\Expr $oExpr) : string
{
if ($oExpr instanceof \PhpParser\Node\Scalar\Int_ || $oExpr instanceof \PhpParser\Node\Scalar\Float_){
return "" . $oExpr->value;
}
return $this->EvaluateBooleanExpression($oExpr) ? "true" : "false";
}
/**
* @param string $sBooleanExpr
*
* @return bool
* @throws ModuleDiscoveryServiceException
*/
public function ComputeBooleanExpression(string $sBooleanExpr) : bool
{
$bResult = false;
try{
@eval('$bResult = '.$sBooleanExpr.';');
} catch (Throwable $t) {
throw new ModuleDiscoveryServiceException("Eval of '$sBooleanExpr' caused an error: ".$t->getMessage());
}
return $bResult;
}
/**
* @param string $sBooleanExpr
*
* @return bool
* @throws ModuleDiscoveryServiceException
*/
public function ComputeBooleanExpression3(string $sBooleanExpr) : bool
{
$sPhpContent = <<<PHP
<?php
$sBooleanExpr;
PHP;
$aNodes = ModuleDiscoveryService::GetInstance()->parsePhpCode($sPhpContent);
$oExpr = $aNodes[0];
return $this->EvaluateBooleanExpression($oExpr->expr);
}
private function EvaluateBooleanExpression(\PhpParser\Node\Expr $oCondExpression) : bool
{
//var_dump($oCondExpression);
if ($oCondExpression instanceof \PhpParser\Node\Expr\BinaryOp){
$sExpr = $this->GetMixedValueForBooleanOperatorEvaluation($oCondExpression->left)
. " "
. $oCondExpression->getOperatorSigil()
. " "
. $this->GetMixedValueForBooleanOperatorEvaluation($oCondExpression->right);
return $this->ComputeBooleanExpression($sExpr);
}
if ($oCondExpression instanceof \PhpParser\Node\Expr\BooleanNot){
return ! $this->EvaluateBooleanExpression($oCondExpression->expr);
}
if ($oCondExpression instanceof \PhpParser\Node\Expr\FuncCall){
return $this->CallFunction($oCondExpression);
}
if ($oCondExpression instanceof \PhpParser\Node\Expr\ConstFetch){
return $this->EvaluateConstantExpression($oCondExpression);
}
return true;
}
private function CallFunction(\PhpParser\Node\Expr\FuncCall $oFunct) : bool
{
$sFunction = $oFunct->name->name;
$aWhiteList = ["function_exists"];
if (! in_array($sFunction, $aWhiteList)){
throw new ModuleDiscoveryServiceException("FuncCall $sFunction not supported");
//return false;
}
$aArgs=[];
foreach ($oFunct->args as $arg){
/** @var \PhpParser\Node\Arg $arg */
$aArgs[]=$arg->value->value;
}
$oReflectionFunction = new ReflectionFunction($sFunction);
return (bool)$oReflectionFunction->invoke(...$aArgs);
}
}
class ModuleDiscoveryServiceException extends Exception