react-native/packager/src/lib/ModuleTransport.js

/**
 * Copyright (c) 2015-present, 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.
 *
 * @flow
 */

'use strict';

import type {RawMapping} from '../Bundler/source-map';
import type {MixedSourceMap} from './SourceMap';

type SourceMapOrMappings = MixedSourceMap | Array<RawMapping>;

type Metadata = {
  dependencies?: ?Array<string>,
  dependencyPairs?: Array<[mixed, {path: string}]>,
  preloaded?: boolean,
};

class ModuleTransport {

  name: string;
  id: number;
  code: string;
  sourceCode: string;
  sourcePath: string;
  virtual: ?boolean;
  meta: ?Metadata;
  polyfill: ?boolean;
  map: ?SourceMapOrMappings;

  constructor(data: {
    name: string,
    id: number,
    code: string,
    sourceCode: string,
    sourcePath: string,
    virtual?: ?boolean,
    meta?: ?Metadata,
    polyfill?: ?boolean,
    map?: ?SourceMapOrMappings,
  }) {
    this.name = data.name;

    assertExists(data, 'id');
    this.id = data.id;

    assertExists(data, 'code');
    this.code = data.code;

    assertExists(data, 'sourceCode');
    this.sourceCode = data.sourceCode;

    assertExists(data, 'sourcePath');
    this.sourcePath = data.sourcePath;

    this.virtual = data.virtual;
    this.meta = data.meta;
    this.polyfill = data.polyfill;
    this.map = data.map;

    Object.freeze(this);
  }

}

module.exports = ModuleTransport;

function assertExists(obj, field) {
  if (obj[field] == null) {
    throw new Error('Modules must have `' + field + '`');
  }
}