Delete Facebook: export birthdays

fb.rb

require 'net/http'

class Birthday
  def initialize(date, name)
    @date = date
    @name = name
  end

  def ics
    "BEGIN:VEVENT\r\nDTSTART;VALUE=DATE:#{@date}\r\nRRULE:FREQ=YEARLY\r\nSUMMARY:Birthday #{@name}\r\nEND:VEVENT\r\n"
  end
end

cal = ENV['FB_CALENDAR_URL']
raise "Must specify FB_CALENDAR_URL" unless cal

data = Net::HTTP.get(URI(cal))

puts "BEGIN:VCALENDAR\r\n"
birthdays = data.split("BEGIN:VEVENT").drop(1)
    .map  { |x| x.split("\r\n") }
    .map  { |x| Birthday.new(x[1].split(":")[1], x[2].split(":")[1]) }
    .each { |x| puts x.ics }
puts "END:VCALENDAR\r\n"