graphql/utilities/typeFromAST.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.typeFromAST = typeFromAST;

var _kinds = require('../language/kinds');

var Kind = _interopRequireWildcard(_kinds);

var _wrappers = require('../type/wrappers');

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

/**
 * Given a Schema and an AST node describing a type, return a GraphQLType
 * definition which applies to that type. For example, if provided the parsed
 * AST node for `[User]`, a GraphQLList instance will be returned, containing
 * the type called "User" found in the schema. If a type called "User" is not
 * found in the schema, then undefined will be returned.
 */
/* eslint-disable no-redeclare */
/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * 
 */

function typeFromAST(schema, typeNode) {
  /* eslint-enable no-redeclare */
  var innerType = void 0;
  if (typeNode.kind === Kind.LIST_TYPE) {
    innerType = typeFromAST(schema, typeNode.type);
    return innerType && (0, _wrappers.GraphQLList)(innerType);
  }
  if (typeNode.kind === Kind.NON_NULL_TYPE) {
    innerType = typeFromAST(schema, typeNode.type);
    return innerType && (0, _wrappers.GraphQLNonNull)(innerType);
  }
  if (typeNode.kind === Kind.NAMED_TYPE) {
    return schema.getType(typeNode.name.value);
  }
  /* istanbul ignore next */
  throw new Error('Unexpected type kind: ' + typeNode.kind + '.');
}