import 'strophejs-plugin-rsm';

require('strophejs-plugin-rsm');
var connection = new Strophe.Connection('wss://...');
var options = {
  before: '',
  isGroup: false,
  max: 50,
};
var messages = [];
var queryid = connection.getUniqueId();
var stanza = $iq({ type: 'set' }).c('query', { xmlns: Strophe.NS.MAM, queryid });
var node = new Strophe.RSM(options);
stanza.cnode(node.toXML());
connection.addHandler((message: any) => {
  var fin = getElementByTagName(message, 'fin', Strophe.NS.MAM);
  var result = getElementByTagName(message, 'result', Strophe.NS.MAM);
  if (fin && queryid === fin.getAttribute('queryid')) {
    var paging = new Strophe.RSM({ xml: fin });
    // `paging` is now our paged RSM object with the following attributes:
    //    paging.next()
    //    paging.previous()
    //    paging.toXML()
    //    paging.fromXMLElement()
    return false;
  } else if (result && queryid === result.getAttribute('queryid')) {
    messages.push(message);
  }
  return true;
}, Strophe.NS.MAM);
connection.sendIQ(stanza, null, null);