学年暦生成するやつ

rits_gakubu_ical.rb

# -*- coding: utf-8 -*-
require 'nokogiri'
require 'open-uri'
require 'icalendar'

# 立命館大学の学年暦(学部)からiCal形式のカレンダーを生成
# 使い方 ruby rits_gakubu_ial.rb > gakubu.ics

calendar = Icalendar::Calendar.new
source_url = 'http://www.ritsumei.jp/profile/a11_j.html'
source = Nokogiri(open(source_url).read)
year = source.at('h4').text.scan(/^\d+/).first.to_i rescue Time.now.year
table = source.at('table')
month = last_month = day = day_of_week = event = nil

table.search('tr')[1..-1].each{ |tr|
  tds = tr.search('td').map{|node| node.text =~ /^\d+$/? node.text.to_i : node.text }
  case tds.length
  when 4
    month, day, day_of_week, event = *tds
    year +=1 if (last_month || 0) > month
  when 3
    day, day_of_week, event = *tds
  when 1
    event = *tds
  end
  calendar.event {
    dtstart     Date.new(year, month, day)
    summary     event
    url         source_url
  }
  last_month = month
}

puts calendar.to_ical