#!/usr/bin/env ruby
#
# $Id: ct2z,v 1.15 2003/11/13 11:13:40 ianmacd Exp $
#
# program to convert the coming 12 months of CorporateTime calendar events to
# Sharp Zaurus calendar format
#
# Copyright (C) 2002 Ian Macdonald
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2, or (at your option)
#   any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software Foundation,
#   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

begin
  require 'password'
rescue LoadError
  $stderr.puts "This program requires Ruby/Password: http://www.caliban.org/ruby/"
  exit 1
end

begin
  require 'rexml/document'
rescue LoadError
  $stderr.puts "This program requires REXML: http://www.germane-software.com/software/rexml/"
  exit 1
end

require 'ctime'
require 'date'

include REXML

server = nil; line_nr = __LINE__
user = nil
passwd = nil

dot_mycal = ENV['HOME'] + '/.mycal'
if FileTest.readable?(dot_mycal)
  File.open(dot_mycal) do |file|
    while line = file.gets
      eval line
    end
  end
end


if server.nil?
  $stderr.puts "Please define a CorporateTime server in either line " +
	       "#{line_nr} of this program or in a ~/.mycal file."
  exit 1
end

user ||= ( print "Username: "; gets.chomp )
passwd ||= Password.new(Password.getc("Calendar password"))

now = Time.now.gmtime
today = Date.today
in_a_year = today + 365

start_date = sprintf("%s%02d%02dT%02d%02d00Z",
                     today.year, today.month, today.day, now.hour, now.min)
end_date = sprintf("%s%02d%02dT%02d%02d00Z",
                   in_a_year.year, in_a_year.month, in_a_year.day,
		   now.hour, now.min)

ct = CTime.new(server, user, passwd)

unless ct.error == "CAPI_STAT_OK"
  printf("Failed to connect to %s as user %s\n", server, user)
  exit 2
end

ct.open_agenda(user)
events = ct.get_events(start_date, end_date)
ct.quit

xml = XMLDecl.new
xml.xmldecl('1.0', 'UTF-8', nil)
doc = Document.new('<!DOCTYPE DATEBOOK>')
doc << xml

parent = doc.add_element('DATEBOOK')
ridmax = parent.add_element('RIDMax')
parent = parent.add_element('events')

rid = 0
events.sort {|a,b| a.start <=> b.start}.each do |e|

  # N.B. all-day events are not handled
  year, month, day, hours, mins, secs =
    /^(\d{4})(\d\d)(\d\d)T(\d\d)(\d\d)(\d\d)Z$/.match(e.start)[1..6]
  start_time = Time.gm(year, month, day, hours, mins, secs).tv_sec

  if ! e.duration.nil?  # CAPI 2.0
    d_hours, d_mins, d_secs =
      /^P\dDT(\d+)H(\d+)M(\d+)S$/.match(e.duration)[1..3]
    end_time = start_time + d_hours.to_s.to_i * 3600 + d_mins.to_s.to_i *
	      60 + d_secs.to_s.to_i
  else			# CAPI 2.5 or later
    e_year, e_month, e_day, e_hours, e_mins, e_secs =
      /^(\d{4})(\d\d)(\d\d)T(\d\d)(\d\d)(\d\d)Z$/.match(e.end)[1..6]
    end_time = Time.gm(e_year, e_month, e_day, e_hours, e_mins, e_secs)
  end

  event = parent.add_element('event')
  event.add_attribute('description', e.summary)
  event.add_attribute('location', e.location)
  event.add_attribute('uid', (-start_time).to_s)
  event.add_attribute('rid', (rid += 1).to_s)
  event.add_attribute('rinfo', '1')
  event.add_attribute('alarm', '5')
  event.add_attribute('sound', 'loud')
  event.add_attribute('start', start_time.to_s)
  event.add_attribute('end', end_time.to_s)
  event.add_attribute('note', e.description)

end

ridmax.add_text(rid.to_s)

doc.write($stdout, 0)
