Create a new custom Board Background

type Trello = {

  key: string;

  token: string;

};

/**

 * Create a new custom Board Background

 * Upload a new custom board background

 */

export async function main(auth: Trello, id: string, file: string | undefined) {

  const url = new URL(

    `https://api.trello.com/1/members/${id}/customBoardBackgrounds`

  );

  for (const [k, v] of [

    ["file", file],

    ["key", auth.key],

    ["token", auth.token],

  ]) {

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

      url.searchParams.append(k, v);

    }

  }

  const response = await fetch(url, {

    method: "POST",

    headers: {

      Authorization: undefined,

    },

    body: undefined,

  });

  if (!response.ok) {

    const text = await response.text();

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

  }

  return await response.json();

}