<?php
namespace MailPoetVendor\Twig\NodeVisitor;
if (!defined('ABSPATH')) exit;
use MailPoetVendor\Twig\Environment;
use MailPoetVendor\Twig\Node\CheckSecurityCallNode;
use MailPoetVendor\Twig\Node\CheckSecurityNode;
use MailPoetVendor\Twig\Node\CheckToStringNode;
use MailPoetVendor\Twig\Node\Expression\Binary\ConcatBinary;
use MailPoetVendor\Twig\Node\Expression\Binary\RangeBinary;
use MailPoetVendor\Twig\Node\Expression\FilterExpression;
use MailPoetVendor\Twig\Node\Expression\FunctionExpression;
use MailPoetVendor\Twig\Node\Expression\GetAttrExpression;
use MailPoetVendor\Twig\Node\Expression\NameExpression;
use MailPoetVendor\Twig\Node\ModuleNode;
use MailPoetVendor\Twig\Node\Node;
use MailPoetVendor\Twig\Node\PrintNode;
use MailPoetVendor\Twig\Node\SetNode;
final class SandboxNodeVisitor implements NodeVisitorInterface
{
private $inAModule = \false;
private $tags;
private $filters;
private $functions;
private $needsToStringWrap = \false;
public function enterNode(Node $node, Environment $env) : Node
{
if ($node instanceof ModuleNode) {
$this->inAModule = \true;
$this->tags = [];
$this->filters = [];
$this->functions = [];
return $node;
} elseif ($this->inAModule) {
// look for tags
if ($node->getNodeTag() && !isset($this->tags[$node->getNodeTag()])) {
$this->tags[$node->getNodeTag()] = $node;
}
// look for filters
if ($node instanceof FilterExpression && !isset($this->filters[$node->getNode('filter')->getAttribute('value')])) {
$this->filters[$node->getNode('filter')->getAttribute('value')] = $node;
}
// look for functions
if ($node instanceof FunctionExpression && !isset($this->functions[$node->getAttribute('name')])) {
$this->functions[$node->getAttribute('name')] = $node;
}
// the .. operator is equivalent to the range() function
if ($node instanceof RangeBinary && !isset($this->functions['range'])) {
$this->functions['range'] = $node;
}
if ($node instanceof PrintNode) {
$this->needsToStringWrap = \true;
$this->wrapNode($node, 'expr');
}
if ($node instanceof SetNode && !$node->getAttribute('capture')) {
$this->needsToStringWrap = \true;
}
// wrap outer nodes that can implicitly call __toString()
if ($this->needsToStringWrap) {
if ($node instanceof ConcatBinary) {
$this->wrapNode($node, 'left');
$this->wrapNode($node, 'right');
}
if ($node instanceof FilterExpression) {
$this->wrapNode($node, 'node');
$this->wrapArrayNode($node, 'arguments');
}
if ($node instanceof FunctionExpression) {
$this->wrapArrayNode($node, 'arguments');
}
}
}
return $node;
}
public function leaveNode(Node $node, Environment $env) : ?Node
{
if ($node instanceof ModuleNode) {
$this->inAModule = \false;
$node->setNode('constructor_end', new Node([new CheckSecurityCallNode(), $node->getNode('constructor_end')]));
$node->setNode('class_end', new Node([new CheckSecurityNode($this->filters, $this->tags, $this->functions), $node->getNode('class_end')]));
} elseif ($this->inAModule) {
if ($node instanceof PrintNode || $node instanceof SetNode) {
$this->needsToStringWrap = \false;
}
}
return $node;
}
private function wrapNode(Node $node, string $name) : void
{
$expr = $node->getNode($name);
if ($expr instanceof NameExpression || $expr instanceof GetAttrExpression) {
$node->setNode($name, new CheckToStringNode($expr));
}
}
private function wrapArrayNode(Node $node, string $name) : void
{
$args = $node->getNode($name);
foreach ($args as $name => $_) {
$this->wrapNode($args, $name);
}
}
public function getPriority() : int
{
return 0;
}
}