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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\Compiler; |
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use Railt\Parser\Ast\RuleInterface; |
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use Railt\Reflection\Contracts\Definition as DefinitionInterface; |
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use Railt\Reflection\Contracts\Document; |
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use Railt\SDL\Builder\BuilderInterface; |
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use Railt\SDL\Builder\Context; |
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use Railt\SDL\Builder\Definition; |
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use Railt\SDL\Builder\Invocation; |
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use Railt\SDL\Exception\TypeException; |
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/** |
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* Class Backend |
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*/ |
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class Backend |
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{ |
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/** |
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* @var string |
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*/ |
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private const ERR_UNSUPPORTED_RULE = '%s is not supported by this compiler'; |
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/** |
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* @var string |
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*/ |
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private const ERR_UNRECOGNIZED_RULE = 'The language rule <%s> is not supported or implemented by this compiler'; |
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/** |
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* @var string[] |
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*/ |
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private const BUILDERS = [ |
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// Root definitions |
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'SchemaDefinition' => Definition\SchemaBuilder::class, |
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'ObjectDefinition' => Definition\ObjectBuilder::class, |
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'EnumDefinition' => Definition\EnumBuilder::class, |
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'ScalarDefinition' => Definition\ScalarBuilder::class, |
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'InputDefinition' => Definition\InputBuilder::class, |
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'DirectiveDefinition' => Definition\DirectiveBuilder::class, |
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'InterfaceDefinition' => Definition\InterfaceBuilder::class, |
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'UnionDefinition' => Definition\UnionBuilder::class, |
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// Invocations |
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'Directive' => Invocation\DirectiveBuilder::class, |
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]; |
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/** |
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* @var string[] |
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*/ |
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private const UNSUPPORTED_BUILDERS = [ |
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'QueryOperation' => 'Query expression', |
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'MutationOperation' => 'Mutation expression', |
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'SubscriptionOperation' => 'Subscription expression', |
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'FragmentDefinition' => 'Fragment definition', |
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]; |
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/** |
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* @var Process |
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*/ |
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private $process; |
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/** |
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* Backend constructor. |
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* @param Process $process |
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*/ |
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public function __construct(Process $process) |
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{ |
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$this->process = $process; |
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} |
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/** |
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* @param Document $document |
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* @return Context |
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*/ |
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public function context(Document $document): Context |
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{ |
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return new Context($document->getFile(), $document); |
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} |
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/** |
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* @param Context $context |
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* @param RuleInterface $ast |
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* @return Document |
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* @throws TypeException |
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*/ |
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public function each(Context $context, RuleInterface $ast): Document |
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{ |
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/** @var \Railt\Reflection\Document $document */ |
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$document = $context->getDocument(); |
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foreach ($ast->getChildren() as $child) { |
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$definition = $this->exec($context, $child); |
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$document->withDefinition($definition); |
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} |
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return $document; |
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} |
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/** |
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* @param Context $context |
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* @param RuleInterface $ast |
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* @return DefinitionInterface |
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* @throws TypeException |
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*/ |
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public function exec(Context $context, RuleInterface $ast): DefinitionInterface |
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{ |
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if ($builder = self::BUILDERS[$ast->getName()] ?? null) { |
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return $this->execBuilder(new $builder($context, $ast, $this->process)); |
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} |
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if ($unsupported = self::UNSUPPORTED_BUILDERS[$ast->getName()] ?? null) { |
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$exception = new TypeException(\sprintf(self::ERR_UNSUPPORTED_RULE, $unsupported)); |
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$exception->throwsIn($context->getFile(), $ast->getOffset()); |
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throw $exception; |
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} |
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$exception = new TypeException(\sprintf(self::ERR_UNRECOGNIZED_RULE, $ast->getName())); |
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$exception->throwsIn($context->getFile(), $ast->getOffset()); |
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throw $exception; |
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} |
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/** |
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* @param BuilderInterface $builder |
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* @return DefinitionInterface |
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*/ |
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private function execBuilder(BuilderInterface $builder): DefinitionInterface |
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{ |
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return $builder->build(); |
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} |
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} |
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railt /
sdl
