Get related records using external id

//native

type Zoho = {

  token: string;

};

/**

 * Get related records using external id

 *

 */

export async function main(

  auth: Zoho,

  module_api_name: string,

  external_value: string,

  related_list_api_name: string,

  page: string | undefined,

  per_page: string | undefined,

  fields: string | undefined,

  If_Modified_Since?: string,

  X_EXTERNAL?: string,

) {

  const url = new URL(

    `https://zohoapis.com/crm/v8/${module_api_name}/${external_value}/${related_list_api_name}`,

  );

  for (const [k, v] of [

    ["page", page],

    ["per_page", per_page],

    ["fields", fields],

  ]) {

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

      url.searchParams.append(k, v);

    }

  }

  const response = await fetch(url, {

    method: "GET",

    headers: {

      ...(If_Modified_Since ? { "If-Modified-Since": If_Modified_Since } : {}),

      ...(X_EXTERNAL ? { "X-EXTERNAL": X_EXTERNAL } : {}),

      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();

}