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<?php namespace SuperClosure\Analyzer\Visitor; use SuperClosure\Exception\ClosureAnalysisException; use PhpParser\Node\Stmt\Namespace_ as NamespaceNode; use PhpParser\Node\Stmt\Trait_ as TraitNode; use PhpParser\Node\Stmt\Class_ as ClassNode; use PhpParser\Node\Expr\Closure as ClosureNode; use PhpParser\Node as AstNode; use PhpParser\NodeVisitorAbstract as NodeVisitor; /** * This is a visitor that extends the nikic/php-parser library and looks for a * closure node and its location. * * @internal */ final class ClosureLocatorVisitor extends NodeVisitor { /** * @var \ReflectionFunction */ private $reflection; /** * @var ClosureNode */ public $closureNode; /** * @var array */ public $location; /** * @param \ReflectionFunction $reflection */ public function __construct($reflection) { $this->reflection = $reflection; $this->location = [ 'class' => null, 'directory' => dirname($this->reflection->getFileName()), 'file' => $this->reflection->getFileName(), 'function' => $this->reflection->getName(), 'line' => $this->reflection->getStartLine(), 'method' => null, 'namespace' => null, 'trait' => null, ]; } public function enterNode(AstNode $node) { // Determine information about the closure's location if (!$this->closureNode) { if ($node instanceof NamespaceNode) { $namespace = $node->name !== null ? $node->name->toString() : null; $this->location['namespace'] = $namespace; } if ($node instanceof TraitNode) { $this->location['trait'] = (string) $node->name; $this->location['class'] = null; } elseif ($node instanceof ClassNode) { $this->location['class'] = (string) $node->name; $this->location['trait'] = null; } } // Locate the node of the closure if ($node instanceof ClosureNode) { if ($node->getAttribute('startLine') == $this->location['line']) { if ($this->closureNode) { $line = $this->location['file'] . ':' . $node->getAttribute('startLine'); throw new ClosureAnalysisException("Two closures were " . "declared on the same line ({$line}) of code. Cannot " . "determine which closure was the intended target."); } else { $this->closureNode = $node; } } } } public function leaveNode(AstNode $node) { // Determine information about the closure's location if (!$this->closureNode) { if ($node instanceof NamespaceNode) { $this->location['namespace'] = null; } if ($node instanceof TraitNode) { $this->location['trait'] = null; } elseif ($node instanceof ClassNode) { $this->location['class'] = null; } } } public function afterTraverse(array $nodes) { if ($this->location['class']) { $this->location['class'] = $this->location['namespace'] . '\\' . $this->location['class']; $this->location['method'] = "{$this->location['class']}::{$this->location['function']}"; } elseif ($this->location['trait']) { $this->location['trait'] = $this->location['namespace'] . '\\' . $this->location['trait']; $this->location['method'] = "{$this->location['trait']}::{$this->location['function']}"; // If the closure was declared in a trait, then we will do a best // effort guess on the name of the class that used the trait. It's // actually impossible at this point to know for sure what it is. if ($closureScope = $this->reflection->getClosureScopeClass()) { $this->location['class'] = $closureScope ? $closureScope->getName() : null; } elseif ($closureThis = $this->reflection->getClosureThis()) { $this->location['class'] = get_class($closureThis); } } } }