/**

 * Copyright (c) Meta Platforms, Inc. and affiliates.

 *

 * This source code is licensed under the MIT license found in the

 * LICENSE file in the root directory of this source tree.

 *

 * @flow

 */

export type ImportManifestEntry = {

  id: string,

  // chunks is a double indexed array of chunkId / chunkFilename pairs

  chunks: Array<string>,

  name: string,

};

// This is the parsed shape of the wire format which is why it is

// condensed to only the essentialy information

export type ImportMetadata =

  | [

      /* id */ string,

      /* chunks id/filename pairs, double indexed */ Array<string>,

      /* name */ string,

      /* async */ 1,

    ]

  | [

      /* id */ string,

      /* chunks id/filename pairs, double indexed */ Array<string>,

      /* name */ string,

    ];

export const ID = 0;

export const CHUNKS = 1;

export const NAME = 2;

// export const ASYNC = 3;

// This logic is correct because currently only include the 4th tuple member

// when the module is async. If that changes we will need to actually assert

// the value is true. We don't index into the 4th slot because flow does not

// like the potential out of bounds access

export function isAsyncImport(metadata: ImportMetadata): boolean {

  return metadata.length === 4;

}