Recursively calling ExpandDL with easyEws Asynchronously to split groups and groups in groups

splitGroupsAndFindExternalsRecursivelyAsync.js

/**
 * Splits a group and calls the completed function
 */
function splitGroupsAndFindExternalsRecursivelyAsync() {
  if(groups.length == 0) { 
    // if no groups stop
    completedCallback(); 
  } else {
    /** @type {string} */
    var group = groups.pop();
    // call expandGroup to get users
    easyEws.expandGroup(group, function(groupUsers) {
      groupUsers.forEach(function(groupUser, index){
        if(groupUser.MailboxType() == "PublicDL") {
          groups.push(groupUser);
        } else {
          /** @type {string} */
          var emailDomain = getDomain(groupUser.Address());
          if(emailDomain != domain) {
            externals.push(groupUser.Address());
          }
        }
      }); // groupUsers.forEach
      splitGroupsAndFindExternalsRecursivelyAsync(); // recursive
    }, function(error) {
      console.log(error);
      // just fail
      completedCallback();
    }); // easyEws.expandGroup
  } // end-if
}