RailsConf 2012 ical generator

Gemfile

source "http://rubygems.org"

gem 'json'
gem 'ri_cal'
gem 'tzinfo'

railsconf-ical.rb

require 'net/http'
Bundler.require(:default)

json_cal = JSON.parse(Net::HTTP.get_response(URI.parse('http://railsconf2012.busyconf.com/event.json')).body)

cal = RiCal.Calendar do |cal|
  json_cal['activities'].each do |activity|
    cal.event do |event|
      time_slot = json_cal['time_slots'].select{ |k, v| k['_id'] == activity['time_slot_id'] }.first

      description = ''
      description << activity['description'] if activity['description']
      if activity['speakers'].any?
        description << "\n\nSpeakers:"
      end
      activity['speakers'].each do |speaker|
        description << "\n#{speaker['name']}"
        description << " (@#{speaker['twitter_username']})" if speaker['twitter_username']
        description << "\n\thttp://github.com/#{speaker['github_username']}" if speaker['github_username']
        description << "\n\t#{speaker['job_title']}" if speaker['job_title']
        description << "\n\t#{speaker['company']}" if speaker['company']
        description << "\n\t#{speaker['url']}" if speaker['url']
        description << "\n\tBio: #{speaker['bio']}" if speaker['bio']
      end

      event.dtstart       = DateTime.parse(time_slot['starts_at']).with_floating_timezone
      event.dtend         = DateTime.parse(time_slot['stops_at']).with_floating_timezone
      event.summary       = activity['title']
      event.description   = description

      if activity['location_override']
        event.location = activity['location_override']
      else
        track = json_cal['tracks'].select{ |k,v| k['_id'] == time_slot['track_id'] }.first
        event.location = track['title'] if track
      end
    end
  end
end

File.open('railsconf.ics', 'w') { |f| f.write(cal) }

I have another gist going with the ics, you can use this to add it to iCal or other calendars (except Google, because it'll complain about GitHub's robots.txt): https://raw.github.com/gist/2434125/af4f20c3f377b019f909a0395770a3df936a7fe1/railsconf2012.ics

If you'd like to add it on Google, I'm hosting it here: http://room118solutions.com/wp-content/uploads/2012/04/railsconf-2012.ics

I'll try to keep them updated.