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<?php |
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/** |
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* This file is part of Railt package. |
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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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declare(strict_types=1); |
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namespace Railt\SDL\Backend\HashTable; |
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use Phplrt\Contracts\Ast\NodeInterface; |
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use Phplrt\Source\Exception\NotAccessibleException; |
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use Phplrt\Visitor\Visitor; |
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use Railt\SDL\Backend\HashTableInterface; |
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use Railt\SDL\Exception\TypeErrorException; |
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use Railt\SDL\Frontend\Ast\Definition\ArgumentDefinitionNode; |
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use Railt\SDL\Frontend\Ast\Definition\InputFieldDefinitionNode; |
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use Railt\SDL\Frontend\Ast\Executable\ArgumentNode; |
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use Railt\SDL\Frontend\Ast\Value\VariableValueNode; |
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use Railt\TypeSystem\Value\ValueInterface; |
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/** |
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* Class VariablesVisitor |
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*/ |
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class VariablesVisitor extends Visitor |
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{ |
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/** |
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* @var HashTableInterface |
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*/ |
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private HashTableInterface $hash; |
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/** |
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* VariablesVisitor constructor. |
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* |
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* @param HashTableInterface $hash |
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*/ |
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public function __construct(HashTableInterface $hash) |
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{ |
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$this->hash = $hash; |
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} |
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/** |
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* @param NodeInterface $node |
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* @return mixed|ValueInterface|null |
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* @throws NotAccessibleException |
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* @throws TypeErrorException |
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* @throws \RuntimeException |
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*/ |
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public function enter(NodeInterface $node) |
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{ |
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switch (true) { |
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case $node instanceof InputFieldDefinitionNode: |
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case $node instanceof ArgumentDefinitionNode: |
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$node->defaultValue = $this->resolve($node->defaultValue); |
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break; |
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case $node instanceof ArgumentNode: |
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$node->value = $this->resolve($node->value); |
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break; |
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} |
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return null; |
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} |
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/** |
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* @param ValueInterface|null $value |
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* @return ValueInterface|null |
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* @throws NotAccessibleException |
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* @throws TypeErrorException |
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* @throws \RuntimeException |
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*/ |
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private function resolve(?ValueInterface $value): ?ValueInterface |
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{ |
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if ($value instanceof VariableValueNode) { |
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return $this->fetch($value); |
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} |
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return $value; |
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} |
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/** |
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* @param VariableValueNode $var |
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* @return ValueInterface |
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* @throws NotAccessibleException |
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* @throws TypeErrorException |
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* @throws \RuntimeException |
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*/ |
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private function fetch(VariableValueNode $var): ValueInterface |
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{ |
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$value = $this->hash->get($var->getName(), $var); |
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if ($value instanceof VariableValueNode) { |
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return $this->fetch($value); |
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} |
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return $value; |
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} |
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} |
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railt /
sdl
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