@ardatan/relay-compiler/core/getIdentifierForArgumentValue.js.flow

A compiler tool for building GraphQL-driven applications.

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow strict
 * @format
 */

// flowlint ambiguous-object-type:error

'use strict';

const invariant = require('invariant');

import type {ArgumentValue} from './IR';

/**
 * Generates an identifier for an argument value. The identifier is based on the
 * structure/order of items and keys in the value.
 */
function getIdentifierForArgumentValue(value: ArgumentValue): mixed {
  switch (value.kind) {
    case 'Variable':
      return {variable: value.variableName};
    case 'Literal':
      return {value: value.value};
    case 'ListValue':
      return {
        list: value.items.map(item => getIdentifierForArgumentValue(item)),
      };
    case 'ObjectValue':
      return {
        object: value.fields.map(field => ({
          name: field.name,
          value: getIdentifierForArgumentValue(field.value),
        })),
      };
    default:
      invariant(
        false,
        'getIdentifierForArgumentValue(): Unsupported AST kind `%s`.',
        value.kind,
      );
  }
}

module.exports = getIdentifierForArgumentValue;