Get file thumbnail

//native

type Box = {

  token: string;

};

/**

 * Get file thumbnail

 * Retrieves a thumbnail, or smaller image representation, of a file.

Sizes of `32x32`,`64x64`, `128x128`, and `256x256` can be returned in

the `.png` format and sizes of `32x32`, `160x160`, and `320x320`

can be returned in the `.jpg` format.

Thumbnails can be generated for the image and video file formats listed

[found on our community site][1].

[1]: https://community.box.com/t5/Migrating-and-Previewing-Content/File-Types-and-Fonts-Supported-in-Box-Content-Preview/ta-p/327

 */

export async function main(

  auth: Box,

  file_id: string,

  extension: "png" | "jpg",

  min_height: string | undefined,

  min_width: string | undefined,

  max_height: string | undefined,

  max_width: string | undefined,

) {

  const url = new URL(

    `https://api.box.com/2.0/files/${file_id}/thumbnail.${extension}`,

  );

  for (const [k, v] of [

    ["min_height", min_height],

    ["min_width", min_width],

    ["max_height", max_height],

    ["max_width", max_width],

  ]) {

    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();

}