import { APIDecoder, APIResponse } from '@ucap-webmessenger/api';

export interface MailCountResponse {
  systemName: string;
  count: number;
}

export const decodeMailCount: APIDecoder<MailCountResponse> = (res: any) => {
  const domParser = new DOMParser();
  const dom: Document = domParser.parseFromString(res, 'text/xml');

  let systemName = '';
  const systemNameDom: HTMLCollection = dom.getElementsByTagName('COUNT');
  if (!!systemNameDom && systemNameDom.length > 0) {
    systemName = systemNameDom[0].textContent;
  }

  let count = 0;
  const countDom: HTMLCollection = dom.getElementsByTagName('COUNT');
  if (!!countDom && countDom.length > 0) {
    count =
      countDom[0].textContent.trim().length > 0
        ? Number(countDom[0].textContent.trim())
        : 0;
  }
  return {
    systemName,
    count
  } as MailCountResponse;
};