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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\NamespaceStmt; |
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use Humbug\PhpScoper\PhpParser\Node\FullyQualifiedFactory; |
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use Humbug\PhpScoper\PhpParser\NodeVisitor\ParentNodeAppender; |
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use Humbug\PhpScoper\PhpParser\NodeVisitor\Resolver\IdentifierResolver; |
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use Humbug\PhpScoper\PhpParser\UnexpectedParsingScenario; |
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use Humbug\PhpScoper\Symbol\EnrichedReflector; |
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use Humbug\PhpScoper\Symbol\SymbolsRegistry; |
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use PhpParser\Node; |
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use PhpParser\Node\Arg; |
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use PhpParser\Node\Expr\FuncCall; |
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use PhpParser\Node\Identifier; |
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use PhpParser\Node\Name; |
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use PhpParser\Node\Name\FullyQualified; |
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use PhpParser\Node\Scalar\String_; |
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use PhpParser\Node\Stmt\Function_; |
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use PhpParser\NodeVisitorAbstract; |
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/** |
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* Records the user functions registered in the global namespace which have been whitelisted and whitelisted functions. |
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* |
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* @private |
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*/ |
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final class FunctionIdentifierRecorder extends NodeVisitorAbstract |
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{ |
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private string $prefix; |
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private IdentifierResolver $identifierResolver; |
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private SymbolsRegistry $symbolsRegistry; |
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private EnrichedReflector $enrichedReflector; |
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public function __construct( |
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string $prefix, |
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IdentifierResolver $identifierResolver, |
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SymbolsRegistry $symbolsRegistry, |
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EnrichedReflector $enrichedReflector |
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) { |
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$this->prefix = $prefix; |
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$this->identifierResolver = $identifierResolver; |
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$this->symbolsRegistry = $symbolsRegistry; |
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$this->enrichedReflector = $enrichedReflector; |
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} |
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public function enterNode(Node $node): Node |
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{ |
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if (!($node instanceof Identifier || $node instanceof Name || $node instanceof String_) |
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|| !ParentNodeAppender::hasParent($node) |
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) { |
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return $node; |
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} |
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$resolvedName = $this->retrieveResolvedName($node); |
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if (null !== $resolvedName |
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&& $this->enrichedReflector->isExposedFunction($resolvedName->toString()) |
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) { |
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$this->symbolsRegistry->recordFunction( |
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$resolvedName, |
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FullyQualifiedFactory::concat($this->prefix, $resolvedName), |
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); |
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} |
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return $node; |
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} |
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private function retrieveResolvedName(Node $node): ?FullyQualified |
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{ |
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if ($node instanceof Identifier) { |
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return $this->retrieveResolvedNameForIdentifier($node); |
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} |
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if ($node instanceof Name) { |
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return $this->retrieveResolvedNameForFuncCall($node); |
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} |
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if ($node instanceof String_) { |
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return $this->retrieveResolvedNameForString($node); |
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} |
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throw UnexpectedParsingScenario::create(); |
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} |
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private function retrieveResolvedNameForIdentifier(Identifier $identifier): ?FullyQualified |
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{ |
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$parent = ParentNodeAppender::getParent($identifier); |
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if (!($parent instanceof Function_) |
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|| $identifier === $parent->returnType |
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) { |
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return null; |
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} |
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$resolvedName = $this->identifierResolver->resolveIdentifier($identifier); |
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return $resolvedName instanceof FullyQualified ? $resolvedName : null; |
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} |
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private function retrieveResolvedNameForFuncCall(Name $name): ?FullyQualified |
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{ |
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$parent = ParentNodeAppender::getParent($name); |
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if (!($parent instanceof FuncCall)) { |
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return null; |
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} |
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return $name instanceof FullyQualified ? $name : null; |
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} |
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private function retrieveResolvedNameForString(String_ $string): ?FullyQualified |
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{ |
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$stringParent = ParentNodeAppender::getParent($string); |
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if (!($stringParent instanceof Arg)) { |
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return null; |
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} |
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$argParent = ParentNodeAppender::getParent($stringParent); |
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if (!($argParent instanceof FuncCall)) { |
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return null; |
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} |
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if (!self::isFunctionExistsCall($argParent)) { |
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return null; |
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} |
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$resolvedName = $this->identifierResolver->resolveString($string); |
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return $resolvedName instanceof FullyQualified ? $resolvedName : null; |
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} |
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private static function isFunctionExistsCall(FuncCall $node): bool |
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{ |
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$name = $node->name; |
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return $name instanceof Name |
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&& $name->isFullyQualified() |
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&& $name->toString() === 'function_exists'; |
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} |
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} |
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humbug /
php-scoper
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