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<?php |
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namespace Digia\GraphQL\Execution; |
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use Digia\GraphQL\Error\InvalidTypeException; |
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use Digia\GraphQL\Language\Node\FieldNode; |
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use Digia\GraphQL\Language\Node\FragmentDefinitionNode; |
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use Digia\GraphQL\Language\Node\FragmentSpreadNode; |
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use Digia\GraphQL\Language\Node\InlineFragmentNode; |
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use Digia\GraphQL\Language\Node\NodeInterface; |
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use Digia\GraphQL\Language\Node\SelectionSetNode; |
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use Digia\GraphQL\Type\Definition\AbstractTypeInterface; |
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use Digia\GraphQL\Type\Definition\ObjectType; |
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use function Digia\GraphQL\Util\typeFromAST; |
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/** |
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* Class FieldCollector |
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* @package Digia\GraphQL\Execution |
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*/ |
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class FieldCollector |
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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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* FieldCollector constructor. |
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* @param ExecutionContext $context |
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*/ |
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public function __construct(ExecutionContext $context) |
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{ |
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$this->context = $context; |
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} |
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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 mixed |
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* @throws InvalidTypeException |
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* @throws \Digia\GraphQL\Error\ExecutionException |
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* @throws \Digia\GraphQL\Error\InvariantException |
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*/ |
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public 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 $selection) { |
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// Check if this Node should be included first |
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if (!$this->shouldIncludeNode($selection)) { |
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continue; |
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} |
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// Collect fields |
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if ($selection instanceof FieldNode) { |
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$fieldName = $this->getFieldNameKey($selection); |
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if (!isset($fields[$fieldName])) { |
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$fields[$fieldName] = []; |
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} |
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$fields[$fieldName][] = $selection; |
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} elseif ($selection instanceof InlineFragmentNode) { |
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if (!$this->doesFragmentConditionMatch($selection, $runtimeType)) { |
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continue; |
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} |
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$this->collectFields($runtimeType, $selection->getSelectionSet(), $fields, $visitedFragmentNames); |
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} elseif ($selection instanceof FragmentSpreadNode) { |
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$fragmentName = $selection->getNameValue(); |
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if (!empty($visitedFragmentNames[$fragmentName])) { |
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continue; |
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} |
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$visitedFragmentNames[$fragmentName] = true; |
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/** @var FragmentDefinitionNode $fragment */ |
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$fragment = $this->context->getFragments()[$fragmentName]; |
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$this->collectFields($runtimeType, $fragment->getSelectionSet(), $fields, $visitedFragmentNames); |
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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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* @TODO: consider to move this to FieldNode |
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* @param FieldNode $node |
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* @return string |
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*/ |
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private function getFieldNameKey(FieldNode $node): string |
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{ |
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return $node->getAlias() ? $node->getAlias()->getValue() : $node->getNameValue(); |
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} |
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/** |
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* @param $node |
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* @return bool |
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* @throws InvalidTypeException |
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* @throws \Digia\GraphQL\Error\ExecutionException |
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* @throws \Digia\GraphQL\Error\InvariantException |
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*/ |
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private function shouldIncludeNode(NodeInterface $node): bool |
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{ |
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$contextVariables = $this->context->getVariableValues(); |
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$skip = coerceDirectiveValues(SkipDirective(), $node, $contextVariables); |
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if ($skip && $skip['if'] === true) { |
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return false; |
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} |
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$include = coerceDirectiveValues(IncludeDirective(), $node, $contextVariables); |
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if ($include && $include['if'] === false) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* @param FragmentDefinitionNode|InlineFragmentNode $fragment |
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* @param ObjectType $type |
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* @return bool |
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* @throws InvalidTypeException |
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*/ |
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private function doesFragmentConditionMatch( |
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NodeInterface $fragment, |
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ObjectType $type |
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): bool { |
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$typeConditionNode = $fragment->getTypeCondition(); |
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if (!$typeConditionNode) { |
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return true; |
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} |
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$conditionalType = typeFromAST($this->context->getSchema(), $typeConditionNode); |
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if ($conditionalType === $type) { |
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return true; |
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} |
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if ($conditionalType instanceof AbstractTypeInterface) { |
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return $this->context->getSchema()->isPossibleType($conditionalType, $type); |
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} |
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return false; |
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} |
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} |
digiaonline /
graphql-php
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