liferayWebService.js

function getUserName() {
  const theme = Liferay.ThemeDisplay;
  const payload = {userId: theme.getUserId()};
  userName = EMPTY_CHAR;
  Liferay.Service(USER_ID_URL, payload)
    .done((response) => {
      userName = response.screenName;
    })
    .fail(() => {
      userName = EMPTY_CHAR;
    });
}

function getSiteId() {
  const theme = Liferay.ThemeDisplay;
  const groupId = theme.getScopeGroupId();
  const companyId = theme.getCompanyId();
  siteId = 0;
  const payload = {
    companyId: companyId,
    className: CLASS_NAME,
    tableName: TBL_NAME,
    columnName: COLUMN_NAME,
    classPK: groupId,
  };
  Liferay.Service(SITE_ID_URL, payload)
    .done((response) => {
      siteId = response.data;
    })
    .fail(() => {
      siteId = -1;
    });
}