Crypton Items API

items-api.js

// We use session.getOrCreateItem in order to create a new item that we can share with others

app.session.getOrCreateItem('myReport', function (err, report) {
  if (err) {
    callback(err);
    return console.error(err);
  }
  // update the report
  report.value = { updated: Date.now(), reportContent: app.reportContent };
  // share this data: 
  report.share(app.session.peers.alice, function (err) { 
    if (err) { 
      return console.error(err); 
    }
    console.log('successfully shared report');
    // From now on each time this report item object is updated, the peer will be notified that there is new data to fetch
  });
});

// Peer is notified of new data to fetch:

app.session.events.onSharedItemUpdate = function sharedItemUpdate(item) {
  // The event handler is triggered when a shared item is updated
  if (item.value.reportContent) {
    app.readReport(item.value);
  } 
};