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<?php |
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namespace Digia\GraphQL\Execution; |
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use Digia\GraphQL\Error\GraphQLError; |
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use Digia\GraphQL\Language\AST\Node\ArgumentNode; |
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use Digia\GraphQL\Language\AST\Node\FieldNode; |
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use Digia\GraphQL\Language\AST\Node\FragmentDefinitionNode; |
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use Digia\GraphQL\Language\AST\Node\InputValueDefinitionNode; |
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use Digia\GraphQL\Language\AST\Node\OperationDefinitionNode; |
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use Digia\GraphQL\Language\AST\Node\SelectionSetNode; |
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use Digia\GraphQL\Language\AST\NodeKindEnum; |
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use Digia\GraphQL\Type\Definition\ObjectType; |
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/** |
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* Class AbstractStrategy |
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* @package Digia\GraphQL\Execution\Strategies |
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*/ |
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abstract class ExecutionStrategy |
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{ |
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/** |
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* @var ExecutionContext |
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*/ |
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protected $context; |
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/** |
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* @var OperationDefinitionNode |
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*/ |
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protected $operation; |
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/** |
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* @var mixed |
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*/ |
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protected $rootValue; |
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/** |
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* AbstractStrategy constructor. |
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* @param ExecutionContext $context |
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* |
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* @param OperationDefinitionNode $operation |
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*/ |
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public function __construct( |
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ExecutionContext $context, |
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OperationDefinitionNode $operation, |
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$rootValue) |
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{ |
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$this->context = $context; |
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$this->operation = $operation; |
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$this->rootValue = $rootValue; |
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} |
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/** |
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* @return array|null |
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*/ |
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abstract function execute(): ?array; |
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/** |
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* @param ObjectType $runtimeType |
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* @param SelectionSetNode $selectionSet |
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* @param $fields |
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* @param $visitedFragmentNames |
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* @return \ArrayObject |
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*/ |
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protected function collectFields( |
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ObjectType $runtimeType, |
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SelectionSetNode $selectionSet, |
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$fields, |
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$visitedFragmentNames |
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) { |
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foreach ($selectionSet->getSelections() as $selection) { |
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/** @var FieldNode $selection */ |
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switch ($selection->getKind()) { |
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case NodeKindEnum::FIELD: |
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$name = $selection->getNameValue(); |
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if (!isset($fields[$name])) { |
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$fields[$name] = new \ArrayObject(); |
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} |
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$fields[$name][] = $selection; |
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break; |
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case NodeKindEnum::INLINE_FRAGMENT: |
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//TODO check if should include this node |
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$this->collectFields( |
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$runtimeType, |
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$selection->getSelectionSet(), |
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$fields, |
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$visitedFragmentNames |
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); |
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break; |
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case NodeKindEnum::FRAGMENT_SPREAD: |
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//TODO check if should include this node |
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if (!empty($visitedFragmentNames[$selection->getNameValue()])) { |
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continue; |
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} |
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$visitedFragmentNames[$selection->getNameValue()] = true; |
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/** @var FragmentDefinitionNode $fragment */ |
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$fragment = $this->context->getFragments()[$selection->getNameValue()]; |
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$this->collectFields( |
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$runtimeType, |
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$fragment->getSelectionSet(), |
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$fields, |
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$visitedFragmentNames |
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); |
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break; |
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} |
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} |
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return $fields; |
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} |
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/** |
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* Implements the "Evaluating selection sets" section of the spec |
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* for "read" mode. |
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* @param ObjectType $parentType |
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* @param $source |
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* @param $path |
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* @param $fields |
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* |
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* @return array |
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* |
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* @throws GraphQLError|\Exception |
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*/ |
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protected function executeFields( |
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ObjectType $parentType, |
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$source, |
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$path, |
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$fields): array |
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{ |
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$finalResults = []; |
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foreach ($fields as $fieldName => $fieldNodes) { |
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$fieldPath = $path; |
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$fieldPath[] = $fieldName; |
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if (!$this->isDefinedField($parentType, $fieldName)) { |
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continue; |
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} |
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$result = $this->resolveField($parentType, |
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$source, |
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$fieldNodes, |
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$fieldPath |
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); |
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$finalResults[$fieldName] = $result; |
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} |
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return $finalResults; |
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} |
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/** |
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* @param ObjectType $parentType |
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* @param string $fieldName |
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* @return bool |
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* @throws \Exception |
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*/ |
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protected function isDefinedField(ObjectType $parentType, string $fieldName) |
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{ |
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return isset($parentType->getFields()[$fieldName]); |
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} |
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/** |
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* @param ObjectType $parentType |
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* @param $source |
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* @param $fieldNodes |
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* @param $path |
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* |
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* @return mixed |
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* |
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* @throws GraphQLError|\Exception |
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*/ |
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protected function resolveField( |
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ObjectType $parentType, |
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$source, |
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$fieldNodes, |
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$path) |
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{ |
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/** @var FieldNode $fieldNode */ |
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$fieldNode = $fieldNodes[0]; |
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$field = $parentType->getFields()[$fieldNode->getNameValue()]; |
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$inputValues = $fieldNode->getArguments() ?? []; |
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$args = []; |
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foreach ($inputValues as $value) { |
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if ($value instanceof ArgumentNode) { |
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$args[] = $value->getValue()->getValue(); |
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} elseif ($value instanceof InputValueDefinitionNode) { |
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$args[] = $value->getDefaultValue()->getValue(); |
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} |
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} |
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$result = $field->resolve(...$args); |
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//TODO Resolve sub fields |
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return $result; |
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} |
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private function completeValue( |
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$returnType, |
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$fieldNodes, |
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$info, |
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$path, |
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&$result) |
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{ |
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} |
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} |
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digiaonline /
graphql-php
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private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.