#!/usr/bin/env ruby
#
# Copyright (C) 2008 Harald Sitter <apachelogger@ubuntu.com>
#
# 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 of
# the License or (at your option) version 3 or any later version
# accepted by the membership of KDE e.V. (or its successor approved
# by the membership of KDE e.V.), which shall act as a proxy
# defined in Section 14 of version 3 of the license.
#
# 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, see <http://www.gnu.org/licenses/>.

require 'fileutils'

rversion = RUBY_VERSION.split(".")
unless rversion[0].to_i >= 1 and rversion[1].to_i >= 9
    puts("ERROR: please install ruby1.9, and start this script using ruby 1.9 ./migrateics.rb")
    exit 1
end

timezone = IO.readlines("/etc/timezone")[0].chomp!

unless $*[0] == nil
    file = $*[0]
else
    file = ENV['HOME'] + "/.kde/share/apps/korganizer/std.ics"
end

puts("copy backup of #{file} to #{ENV['HOME']}")
FileUtils.copy(file, ENV['HOME'])

puts("opening #{file} for editing")
file = File.new(file, File::RDWR)
str = file.read()
file.rewind()
file.truncate( 0 )
nustr = []
for line in str.split("\n")
    if line.start_with?("DTSTART") or line.start_with?("DTEND")
        line = line.gsub!("Z","")
    end
    for replace in ["DTSTART","DTEND"]
        line.gsub!("#{replace}:","#{replace};TZID=#{timezone}:")
    end
    nustr += [line]
end
file << nustr.join("\n")
file.close()
puts("closing file object #{file}, finished editing")