Kali: iCalendar for the rest of us

Kali attempts to provide a simple and extensible implementation of RFC 5545 and friends, which describe the iCalendar format, used for representing and exchanging calendaring and scheduling information.

Kālī is also the Hindu Goddess of Time.

Generating Calendars

The simplest example possible:

require "uri"
require "kali"

calendar = Kali::Calendar.new do |cal|
  cal.event do |event|
    event.summary = "Lunch" # Or: event.summary = Kali::Property::Summary.new("Lunch")
    event.description = "Let's get some food"
    event.dtstart = DateTime.civil(2013, 7, 31, 12, 30)
    event.dtend = DateTime.civil(2013, 7, 31, 14, 30)

    event.attendees.add URI("mailto:hi@nicolassanguinetti.info") do |attendee|
      attendee.partstat = "ACCEPTED"
      attendee.cn = "Nicolás Sanguinetti"
      attendee["X-GUEST-COUNT"] = 2
    end

    event.attendees.add URI("mailto:someone@example.com") # Simplified attendee
  end
end

File.open("cal.ics", "w") { |f| f.puts(calendar.to_ics) }