railt/graphql

/**
 * --------------------------------------------------------------------------
 *  GraphQL SDL Schema
 * --------------------------------------------------------------------------
 *
 * A GraphQL service's collective type system capabilities are referred
 * to as that service's "schema". A schema is defined in terms of the
 * types and directives it supports as well as the root operation types for
 * each kind of operation: query, mutation, and subscription; this
 * determines the place in the type system where those operations begin.
 *
 * @see https://facebook.github.io/graphql/June2018/#sec-Schema
 *
 */

SchemaDefinition -> {
    return new Stmt\Definition\SchemaDefinitionNode(
        $children[0],
        $children[2]->getArrayCopy(),
        $children[1]->getArrayCopy(),
    );
}
  : Description()
    SchemaDefinitionExceptDescription()
  ;

SchemaDefinitionExceptDescription
  : SchemaDefinitionHead()
    OptionalSchemaDefinitionBody()
  ;

SchemaDefinitionHead
  : ::T_SCHEMA:: Directives()
  ;

OptionalSchemaDefinitionBody -> { return new \ArrayObject($children); }
  : SchemaDefinitionBody()?
  ;

SchemaDefinitionBody
  : ::T_BRACE_OPEN::
      (OperationTypeDefinition() ::T_COMMA::?)*
    ::T_BRACE_CLOSE::
  ;


/**
 * --------------------------------------------------------------------------
 *  GraphQL SDL Schema Fields
 * --------------------------------------------------------------------------
 *
 * A schema defines the initial root operation type for each kind of
 * operation it supports: query, mutation, and subscription; this determines
 * the place in the type system where those operations begin.
 *
 * @see https://facebook.github.io/graphql/June2018/#sec-Root-Operation-Types
 */

OperationTypeDefinition -> {
    return new Stmt\SchemaFieldNode(
        $children[1],
        $children[0],
        $children[2],
        $children[3]->getArrayCopy(),
    );
}
  : Description()
    SchemaFieldName() ::T_COLON:: NamedType()
    Directives()
  ;

SchemaFieldName -> {
    return new Node\IdentifierNode($children->getValue());
}
  : <T_QUERY>
  | <T_MUTATION>
  | <T_SUBSCRIPTION>
  ;