<?php declare(strict_types=1);
namespace PhpParser;
class NodeTraverser implements NodeTraverserInterface {
/**
* @deprecated Use NodeVisitor::DONT_TRAVERSE_CHILDREN instead.
*/
public const DONT_TRAVERSE_CHILDREN = NodeVisitor::DONT_TRAVERSE_CHILDREN;
/**
* @deprecated Use NodeVisitor::STOP_TRAVERSAL instead.
*/
public const STOP_TRAVERSAL = NodeVisitor::STOP_TRAVERSAL;
/**
* @deprecated Use NodeVisitor::REMOVE_NODE instead.
*/
public const REMOVE_NODE = NodeVisitor::REMOVE_NODE;
/**
* @deprecated Use NodeVisitor::DONT_TRAVERSE_CURRENT_AND_CHILDREN instead.
*/
public const DONT_TRAVERSE_CURRENT_AND_CHILDREN = NodeVisitor::DONT_TRAVERSE_CURRENT_AND_CHILDREN;
/** @var list<NodeVisitor> Visitors */
protected array $visitors = [];
/** @var bool Whether traversal should be stopped */
protected bool $stopTraversal;
/**
* Create a traverser with the given visitors.
*
* @param NodeVisitor ...$visitors Node visitors
*/
public function __construct(NodeVisitor ...$visitors) {
$this->visitors = $visitors;
}
/**
* Adds a visitor.
*
* @param NodeVisitor $visitor Visitor to add
*/
public function addVisitor(NodeVisitor $visitor): void {
$this->visitors[] = $visitor;
}
/**
* Removes an added visitor.
*/
public function removeVisitor(NodeVisitor $visitor): void {
$index = array_search($visitor, $this->visitors);
if ($index !== false) {
array_splice($this->visitors, $index, 1, []);
}
}
/**
* Traverses an array of nodes using the registered visitors.
*
* @param Node[] $nodes Array of nodes
*
* @return Node[] Traversed array of nodes
*/
public function traverse(array $nodes): array {
$this->stopTraversal = false;
foreach ($this->visitors as $visitor) {
if (null !== $return = $visitor->beforeTraverse($nodes)) {
$nodes = $return;
}
}
$nodes = $this->traverseArray($nodes);
for ($i = \count($this->visitors) - 1; $i >= 0; --$i) {
$visitor = $this->visitors[$i];
if (null !== $return = $visitor->afterTraverse($nodes)) {
$nodes = $return;
}
}
return $nodes;
}
/**
* Recursively traverse a node.
*
* @param Node $node Node to traverse.
*/
protected function traverseNode(Node $node): void {
foreach ($node->getSubNodeNames() as $name) {
$subNode = $node->$name;
if (\is_array($subNode)) {
$node->$name = $this->traverseArray($subNode);
if ($this->stopTraversal) {
break;
}
} elseif ($subNode instanceof Node) {
$traverseChildren = true;
$visitorIndex = -1;
foreach ($this->visitors as $visitorIndex => $visitor) {
$return = $visitor->enterNode($subNode);
if (null !== $return) {
if ($return instanceof Node) {
$this->ensureReplacementReasonable($subNode, $return);
$subNode = $node->$name = $return;
} elseif (NodeVisitor::DONT_TRAVERSE_CHILDREN === $return) {
$traverseChildren = false;
} elseif (NodeVisitor::DONT_TRAVERSE_CURRENT_AND_CHILDREN === $return) {
$traverseChildren = false;
break;
} elseif (NodeVisitor::STOP_TRAVERSAL === $return) {
$this->stopTraversal = true;
break 2;
} elseif (NodeVisitor::REPLACE_WITH_NULL === $return) {
$node->$name = null;
continue 2;
} else {
throw new \LogicException(
'enterNode() returned invalid value of type ' . gettype($return)
);
}
}
}
if ($traverseChildren) {
$this->traverseNode($subNode);
if ($this->stopTraversal) {
break;
}
}
for (; $visitorIndex >= 0; --$visitorIndex) {
$visitor = $this->visitors[$visitorIndex];
$return = $visitor->leaveNode($subNode);
if (null !== $return) {
if ($return instanceof Node) {
$this->ensureReplacementReasonable($subNode, $return);
$subNode = $node->$name = $return;
} elseif (NodeVisitor::STOP_TRAVERSAL === $return) {
$this->stopTraversal = true;
break 2;
} elseif (NodeVisitor::REPLACE_WITH_NULL === $return) {
$node->$name = null;
break;
} elseif (\is_array($return)) {
throw new \LogicException(
'leaveNode() may only return an array ' .
'if the parent structure is an array'
);
} else {
throw new \LogicException(
'leaveNode() returned invalid value of type ' . gettype($return)
);
}
}
}
}
}
}
/**
* Recursively traverse array (usually of nodes).
*
* @param array $nodes Array to traverse
*
* @return array Result of traversal (may be original array or changed one)
*/
protected function traverseArray(array $nodes): array {
$doNodes = [];
foreach ($nodes as $i => $node) {
if ($node instanceof Node) {
$traverseChildren = true;
$visitorIndex = -1;
foreach ($this->visitors as $visitorIndex => $visitor) {
$return = $visitor->enterNode($node);
if (null !== $return) {
if ($return instanceof Node) {
$this->ensureReplacementReasonable($node, $return);
$nodes[$i] = $node = $return;
} elseif (\is_array($return)) {
$doNodes[] = [$i, $return];
continue 2;
} elseif (NodeVisitor::REMOVE_NODE === $return) {
$doNodes[] = [$i, []];
continue 2;
} elseif (NodeVisitor::DONT_TRAVERSE_CHILDREN === $return) {
$traverseChildren = false;
} elseif (NodeVisitor::DONT_TRAVERSE_CURRENT_AND_CHILDREN === $return) {
$traverseChildren = false;
break;
} elseif (NodeVisitor::STOP_TRAVERSAL === $return) {
$this->stopTraversal = true;
break 2;
} elseif (NodeVisitor::REPLACE_WITH_NULL === $return) {
throw new \LogicException(
'REPLACE_WITH_NULL can not be used if the parent structure is an array');
} else {
throw new \LogicException(
'enterNode() returned invalid value of type ' . gettype($return)
);
}
}
}
if ($traverseChildren) {
$this->traverseNode($node);
if ($this->stopTraversal) {
break;
}
}
for (; $visitorIndex >= 0; --$visitorIndex) {
$visitor = $this->visitors[$visitorIndex];
$return = $visitor->leaveNode($node);
if (null !== $return) {
if ($return instanceof Node) {
$this->ensureReplacementReasonable($node, $return);
$nodes[$i] = $node = $return;
} elseif (\is_array($return)) {
$doNodes[] = [$i, $return];
break;
} elseif (NodeVisitor::REMOVE_NODE === $return) {
$doNodes[] = [$i, []];
break;
} elseif (NodeVisitor::STOP_TRAVERSAL === $return) {
$this->stopTraversal = true;
break 2;
} elseif (NodeVisitor::REPLACE_WITH_NULL === $return) {
throw new \LogicException(
'REPLACE_WITH_NULL can not be used if the parent structure is an array');
} else {
throw new \LogicException(
'leaveNode() returned invalid value of type ' . gettype($return)
);
}
}
}
} elseif (\is_array($node)) {
throw new \LogicException('Invalid node structure: Contains nested arrays');
}
}
if (!empty($doNodes)) {
while (list($i, $replace) = array_pop($doNodes)) {
array_splice($nodes, $i, 1, $replace);
}
}
return $nodes;
}
private function ensureReplacementReasonable(Node $old, Node $new): void {
if ($old instanceof Node\Stmt && $new instanceof Node\Expr) {
throw new \LogicException(
"Trying to replace statement ({$old->getType()}) " .
"with expression ({$new->getType()}). Are you missing a " .
"Stmt_Expression wrapper?"
);
}
if ($old instanceof Node\Expr && $new instanceof Node\Stmt) {
throw new \LogicException(
"Trying to replace expression ({$old->getType()}) " .
"with statement ({$new->getType()})"
);
}
}
}
At NFC Pay, we strive to provide a seamless and satisfactory experience with our services. This Refund Policy outlines the circumstances under which refunds may be issued for transactions made through our platform. Please read this policy carefully to understand your rights regarding refunds.
1. Eligibility for Refunds
Refunds may be considered under the following circumstances:
2. Non-Refundable Situations
Refunds will generally not be issued in the following situations:
3. Refund Process
To request a refund, please follow these steps:
4. Refund Exceptions
Certain transactions may be subject to specific terms and conditions, including non-refundable fees or charges. Please review the terms associated with each transaction carefully, as some fees may not be eligible for refunds.
5. Modifications to the Refund Policy
NFC Pay reserves the right to modify this Refund Policy at any time. Changes will be communicated through updates on our website and app, and the effective date will be updated accordingly. We encourage you to review this policy periodically to stay informed about our refund practices.
By using NFC Pay, you agree to this Refund Policy and understand the terms under which refunds may be issued. Our goal is to ensure a fair and transparent refund process, providing you with confidence and peace of mind when using our services.