graphql/lib/validator/rules/KnownDirectives.js

A Query Language and Runtime which can target any service.

/* @flow */
/**
 *  Copyright (c) 2015, Facebook, Inc.
 *  All rights reserved.
 *
 *  This source code is licensed under the BSD-style license found in the
 *  LICENSE file in the root directory of this source tree. An additional grant
 *  of patent rights can be found in the PATENTS file in the same directory.
 */

'use strict';

var _Object$defineProperty = require('babel-runtime/core-js/object/define-property')['default'];

var _interopRequireDefault = require('babel-runtime/helpers/interop-require-default')['default'];

_Object$defineProperty(exports, '__esModule', {
  value: true
});

exports['default'] = KnownDirectives;

var _error = require('../../error');

var _errors = require('../errors');

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

var _utilsFind = require('../../utils/find');

var _utilsFind2 = _interopRequireDefault(_utilsFind);

/**
 * Known directives
 *
 * A GraphQL document is only valid if all `@directives` are known by the
 * schema and legally positioned.
 */

function KnownDirectives(context) {
  return {
    Directive: function Directive(node, key, parent, path, ancestors) {
      var directiveDef = (0, _utilsFind2['default'])(context.getSchema().getDirectives(), function (def) {
        return def.name === node.name.value;
      });
      if (!directiveDef) {
        return new _error.GraphQLError((0, _errors.unknownDirectiveMessage)(node.name.value), [node]);
      }
      var appliedTo = ancestors[ancestors.length - 1];
      if (appliedTo.kind === _languageKinds.OPERATION_DEFINITION && !directiveDef.onOperation) {
        return new _error.GraphQLError((0, _errors.misplacedDirectiveMessage)(node.name.value, 'operation'), [node]);
      }
      if (appliedTo.kind === _languageKinds.FIELD && !directiveDef.onField) {
        return new _error.GraphQLError((0, _errors.misplacedDirectiveMessage)(node.name.value, 'field'), [node]);
      }
      if ((appliedTo.kind === _languageKinds.FRAGMENT_SPREAD || appliedTo.kind === _languageKinds.INLINE_FRAGMENT || appliedTo.kind === _languageKinds.FRAGMENT_DEFINITION) && !directiveDef.onFragment) {
        return new _error.GraphQLError((0, _errors.misplacedDirectiveMessage)(node.name.value, 'fragment'), [node]);
      }
    }
  };
}

module.exports = exports['default'];