Get an exchange rate.

//native

type Zoho = {

  token: string;

};

/**

 * Get an exchange rate.

 * Get the details of an exchange rate that has been asscoiated to the currency.

 */

export async function main(

  auth: Zoho,

  currency_id: string,

  exchange_rate_id: string,

  organization_id: string | undefined,

) {

  const url = new URL(

    `https://www.zohoapis.com/books/v3/settings/currencies/${currency_id}/exchangerates/${exchange_rate_id}`,

  );

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

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

      url.searchParams.append(k, v);

    }

  }

  const response = await fetch(url, {

    method: "GET",

    headers: {

      Authorization: "Zoho-oauthtoken " + auth.token,

    },

    body: undefined,

  });

  if (!response.ok) {

    const text = await response.text();

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

  }

  return await response.json();

}