Get file version

//native

type Box = {

  token: string;

};

/**

 * Get file version

 * Retrieve a specific version of a file.

Versions are only tracked for Box users with premium accounts.

 */

export async function main(

  auth: Box,

  file_id: string,

  file_version_id: string,

  fields: string | undefined,

) {

  const url = new URL(

    `https://api.box.com/2.0/files/${file_id}/versions/${file_version_id}`,

  );

  for (const [k, v] of [["fields", fields]]) {

    if (v !== undefined && v !== "" && k !== undefined) {

      url.searchParams.append(k, v);

    }

  }

  const response = await fetch(url, {

    method: "GET",

    headers: {

      Authorization: "Bearer " + auth.token,

    },

    body: undefined,

  });

  if (!response.ok) {

    const text = await response.text();

    throw new Error(`${response.status} ${text}`);

  }

  return await response.json();

}