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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of the humbug/php-scoper package. |
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* |
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* Copyright (c) 2017 Théo FIDRY <[email protected]>, |
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* Pádraic Brady <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Humbug\PhpScoper\PhpParser\NodeVisitor\UseStmt; |
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use ArrayIterator; |
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use Humbug\PhpScoper\PhpParser\Node\NamedIdentifier; |
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use Humbug\PhpScoper\PhpParser\NodeVisitor\ParentNodeAppender; |
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use IteratorAggregate; |
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use PhpParser\Node; |
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use PhpParser\Node\Expr\ConstFetch; |
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use PhpParser\Node\Expr\FuncCall; |
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use PhpParser\Node\Name; |
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use PhpParser\Node\Stmt\ClassLike; |
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use PhpParser\Node\Stmt\Function_; |
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use PhpParser\Node\Stmt\Use_; |
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use PhpParser\Node\Stmt\UseUse; |
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use function array_key_exists; |
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use function count; |
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use function implode; |
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/** |
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* Utility class collecting all the use statements for the scoped files allowing to easily find the use which a node |
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* may use. |
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* |
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* @private |
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*/ |
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final class UseStmtCollection implements IteratorAggregate |
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{ |
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private $hashes = []; |
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/** |
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* @var Use_[][] |
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*/ |
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private $nodes = [ |
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null => [], |
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]; |
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public function add(?Name $namespaceName, Use_ $use): void |
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{ |
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$this->nodes[(string) $namespaceName][] = $use; |
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} |
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/** |
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* Finds the statements matching the given name. |
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* |
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* $name = 'Foo'; |
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* |
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* use X; |
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* use Bar\Foo; |
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* use Y; |
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* |
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* will return the use statement for `Bar\Foo`. |
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* |
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* @param Name|null $namespaceName |
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* @param Name $node |
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* |
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* @return null|Name |
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*/ |
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public function findStatementForNode(?Name $namespaceName, Name $node): ?Name |
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{ |
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$name = strtolower($node->getFirst()); |
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$parentNode = ParentNodeAppender::findParent($node); |
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if ($parentNode instanceof ClassLike |
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&& $node instanceof NamedIdentifier |
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&& $node->getOriginalNode() === $parentNode->name |
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) { |
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// The current node can either be the class like name or one of its elements, e.g. extends or implements. |
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// In the first case, the node was original an Identifier. |
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return null; |
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} |
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$isFunctionName = $this->isFunctionName($node, $parentNode); |
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$isConstantName = $this->isConstantName($node, $parentNode); |
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$hash = implode( |
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':', |
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[ |
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$namespaceName ? $namespaceName->toString() : '', |
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$name, |
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$isFunctionName ? 'func' : '', |
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$isConstantName ? 'const' : '', |
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] |
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); |
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if (array_key_exists($hash, $this->hashes)) { |
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return $this->hashes[$hash]; |
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} |
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return $this->hashes[$hash] = $this->find( |
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$this->nodes[(string) $namespaceName] ?? [], |
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$isFunctionName, |
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$isConstantName, |
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$name |
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); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getIterator(): iterable |
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{ |
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return new ArrayIterator($this->nodes); |
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} |
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private function find(array $useStatements, bool $isFunctionName, bool $isConstantName, string $name): ?Name |
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{ |
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foreach ($useStatements as $use_) { |
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foreach ($use_->uses as $useStatement) { |
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if (false === ($useStatement instanceof UseUse)) { |
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continue; |
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} |
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if ($name === $useStatement->getAlias()->toLowerString()) { |
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if ($isFunctionName) { |
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if (Use_::TYPE_FUNCTION === $use_->type) { |
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return UseStmtManipulator::getOriginalName($useStatement); |
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} |
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continue; |
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} |
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if ($isConstantName) { |
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if (Use_::TYPE_CONSTANT === $use_->type) { |
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return UseStmtManipulator::getOriginalName($useStatement); |
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} |
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continue; |
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} |
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// Match the alias |
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return UseStmtManipulator::getOriginalName($useStatement); |
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} |
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} |
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} |
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return null; |
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} |
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private function isFunctionName(Name $node, ?Node $parentNode): bool |
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{ |
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if (null === $parentNode || 1 !== count($node->parts)) { |
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return false; |
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} |
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if ($parentNode instanceof FuncCall) { |
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return true; |
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} |
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if (false === ($parentNode instanceof Function_)) { |
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return false; |
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} |
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/* @var Function_ $parentNode */ |
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return $node instanceof NamedIdentifier && $node->getOriginalNode() === $parentNode->name; |
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} |
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private function isConstantName(Name $node, ?Node $parentNode): bool |
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{ |
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return $parentNode instanceof ConstFetch && 1 === count($node->parts); |
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} |
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} |
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humbug /
php-scoper
