/**
* Not exactly the same as the executor's definition of getFieldDef, in this
* statically evaluated environment we do not always have an Object type,
* and need to handle Interface and Union types.
*
* @return FieldDefinition
*/
private static function _getFieldDef(Schema $schema, Type $parentType, Field $fieldAST)
{
$name = $fieldAST->name->value;
$schemaMeta = Introspection::schemaMetaFieldDef();
if ($name === $schemaMeta->name && $schema->getQueryType() === $parentType) {
return $schemaMeta;
}
$typeMeta = Introspection::typeMetaFieldDef();
if ($name === $typeMeta->name && $schema->getQueryType() === $parentType) {
return $typeMeta;
}
$typeNameMeta = Introspection::typeNameMetaFieldDef();
if ($name === $typeNameMeta->name && ($parentType instanceof ObjectType || $parentType instanceof InterfaceType || $parentType instanceof UnionType)) {
return $typeNameMeta;
}
if ($parentType instanceof ObjectType || $parentType instanceof InterfaceType) {
$fields = $parentType->getFields();
return isset($fields[$name]) ? $fields[$name] : null;
}
return null;
}
/**
* This method looks up the field on the given type defintion.
* It has special casing for the two introspection fields, __schema
* and __typename. __typename is special because it can always be
* queried as a field, even in situations where no other fields
* are allowed, like on a Union. __schema could get automatically
* added to the query type, but that would require mutating type
* definitions, which would cause issues.
*
* @param Schema $schema
* @param ObjectType $parentType
* @param $fieldName
*
* @return FieldDefinition
*/
private static function getFieldDef(Schema $schema, ObjectType $parentType, $fieldName)
{
static $schemaMetaFieldDef, $typeMetaFieldDef, $typeNameMetaFieldDef;
$schemaMetaFieldDef = $schemaMetaFieldDef ?: Introspection::schemaMetaFieldDef();
$typeMetaFieldDef = $typeMetaFieldDef ?: Introspection::typeMetaFieldDef();
$typeNameMetaFieldDef = $typeNameMetaFieldDef ?: Introspection::typeNameMetaFieldDef();
if ($fieldName === $schemaMetaFieldDef->name && $schema->getQueryType() === $parentType) {
return $schemaMetaFieldDef;
} else {
if ($fieldName === $typeMetaFieldDef->name && $schema->getQueryType() === $parentType) {
return $typeMetaFieldDef;
} else {
if ($fieldName === $typeNameMetaFieldDef->name) {
return $typeNameMetaFieldDef;
}
}
}
$tmp = $parentType->getFields();
return isset($tmp[$fieldName]) ? $tmp[$fieldName] : null;
}
/**
* Given a selectionSet, adds all of the fields in that selection to
* the passed in map of fields, and returns it at the end.
*
* Note: This is not the same as execution's collectFields because at static
* time we do not know what object type will be used, so we unconditionally
* spread in all fragments.
*
* @see GraphQL\Validator\Rules\OverlappingFieldsCanBeMerged
*
* @param ValidationContext $context
* @param Type|null $parentType
* @param SelectionSetNode $selectionSet
* @param \ArrayObject $visitedFragmentNames
* @param \ArrayObject $astAndDefs
*
* @return \ArrayObject
*/
protected function collectFieldASTsAndDefs(ValidationContext $context, $parentType, SelectionSetNode $selectionSet, \ArrayObject $visitedFragmentNames = null, \ArrayObject $astAndDefs = null)
{
$_visitedFragmentNames = $visitedFragmentNames ?: new \ArrayObject();
$_astAndDefs = $astAndDefs ?: new \ArrayObject();
foreach ($selectionSet->selections as $selection) {
switch ($selection->kind) {
case NodeKind::FIELD:
/* @var FieldNode $selection */
$fieldName = $selection->name->value;
$fieldDef = null;
if ($parentType && method_exists($parentType, 'getFields')) {
$tmp = $parentType->getFields();
$schemaMetaFieldDef = Introspection::schemaMetaFieldDef();
$typeMetaFieldDef = Introspection::typeMetaFieldDef();
$typeNameMetaFieldDef = Introspection::typeNameMetaFieldDef();
if ($fieldName === $schemaMetaFieldDef->name && $context->getSchema()->getQueryType() === $parentType) {
$fieldDef = $schemaMetaFieldDef;
} elseif ($fieldName === $typeMetaFieldDef->name && $context->getSchema()->getQueryType() === $parentType) {
$fieldDef = $typeMetaFieldDef;
} elseif ($fieldName === $typeNameMetaFieldDef->name) {
$fieldDef = $typeNameMetaFieldDef;
} elseif (isset($tmp[$fieldName])) {
$fieldDef = $tmp[$fieldName];
}
}
$responseName = $this->getFieldName($selection);
if (!isset($_astAndDefs[$responseName])) {
$_astAndDefs[$responseName] = new \ArrayObject();
}
// create field context
$_astAndDefs[$responseName][] = [$selection, $fieldDef];
break;
case NodeKind::INLINE_FRAGMENT:
/* @var InlineFragmentNode $selection */
$_astAndDefs = $this->collectFieldASTsAndDefs($context, TypeInfo::typeFromAST($context->getSchema(), $selection->typeCondition), $selection->selectionSet, $_visitedFragmentNames, $_astAndDefs);
break;
case NodeKind::FRAGMENT_SPREAD:
/* @var FragmentSpreadNode $selection */
$fragName = $selection->name->value;
if (empty($_visitedFragmentNames[$fragName])) {
$_visitedFragmentNames[$fragName] = true;
$fragment = $context->getFragment($fragName);
if ($fragment) {
$_astAndDefs = $this->collectFieldASTsAndDefs($context, TypeInfo::typeFromAST($context->getSchema(), $fragment->typeCondition), $fragment->selectionSet, $_visitedFragmentNames, $_astAndDefs);
}
}
break;
}
}
return $_astAndDefs;
}