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<?php |
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namespace Spatie\Php7to5\NodeVisitors; |
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use PhpParser\Node; |
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use PhpParser\Node\Stmt\Declare_; |
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use PhpParser\Node\Stmt\Namespace_; |
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use PhpParser\Node\Stmt\Use_; |
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use PhpParser\NodeVisitorAbstract; |
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use Spatie\Php7to5\Exceptions\InvalidPhpCode; |
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class AnonymousClassReplacer extends NodeVisitorAbstract |
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{ |
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/** |
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* @var array |
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*/ |
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protected $anonymousClassNodes = []; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function leaveNode(Node $node) |
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{ |
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if (!$node instanceof Node\Expr\New_) { |
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return; |
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} |
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$classNode = $node->class; |
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if (!$classNode instanceof Node\Stmt\Class_) { |
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return; |
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} |
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$newClassName = 'AnonymousClass'.count($this->anonymousClassNodes); |
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$classNode->name = $newClassName; |
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$this->anonymousClassNodes[] = $classNode; |
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// Generate new code that instantiate our new class |
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$newNode = new Node\Expr\New_( |
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new Node\Expr\ConstFetch( |
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new Node\Name($newClassName) |
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) |
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); |
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return $newNode; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function afterTraverse(array $nodes) |
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{ |
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if (count($this->anonymousClassNodes) === 0) { |
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return $nodes; |
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} |
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$anonymousClassStatements = $this->anonymousClassNodes; |
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$hookIndex = $this->getAnonymousClassHookIndex($nodes); |
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$nodes = $this->moveAnonymousClassesToHook($nodes, $hookIndex, $anonymousClassStatements); |
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return $nodes; |
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} |
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/** |
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* Find the index of the first statement that is not a declare, use or namespace statement. |
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* |
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* @param array $statements |
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* |
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* @return int |
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* |
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* @throws \Spatie\Php7to5\Exceptions\InvalidPhpCode |
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*/ |
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protected function getAnonymousClassHookIndex(array $statements) |
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{ |
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$hookIndex = false; |
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foreach ($statements as $index => $statement) { |
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if (!$statement instanceof Declare_ && |
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!$statement instanceof Use_ && |
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!$statement instanceof Namespace_) { |
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$hookIndex = $index; |
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break; |
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} |
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} |
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if ($hookIndex === false) { |
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throw InvalidPhpCode::noValidLocationFoundToInsertClasses(); |
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} |
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return $hookIndex; |
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} |
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/** |
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* @param array $nodes |
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* @param $hookIndex |
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* @param $anonymousClassStatements |
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* |
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* @return array |
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*/ |
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protected function moveAnonymousClassesToHook(array $nodes, $hookIndex, $anonymousClassStatements) |
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{ |
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$preStatements = array_slice($nodes, 0, $hookIndex); |
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$postStatements = array_slice($nodes, $hookIndex); |
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return array_merge($preStatements, $anonymousClassStatements, $postStatements); |
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} |
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} |
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spatie /
7to5
