node-ical | NodeJS class for parsing iCalendar/ICS files | Runtime Evironment library

I am trying to experiment with sails.js (with node.js). I have a controller as follows. Thsi controller parse an ical url passed in the url param as ical_url and I am trying to parse it and build a normalized json objetc pe rmy need. I have a parse function that is only exposed outside this controller. That uses node-ical npm package (https://www.npmjs.com/package/node-ical) to parse the ical content. In the ical.fromURL method, I have a callback function withing which I initialized a variable normalized_data and storing data in it. My intention to use that data and call to decorate method for some processing and get the json back. Please look at the line starting with //>>>>>> and as per my desire there, I do not have access of normalized_data As per https://github.com/jens-maus/node-ical/blob/HEAD/index.js#L87 ical.fromURL is returning a promise but I am having difficulty understanding how to use the data which is part of that promise. Can someone help me out to make the change needed in this file (especially in the parse method) to meet my expectation? Thanks in advance.