Enrollme googlecalendar export improver

convert.rb

#!/usr/bin/env ruby
# Skrypcik konwerujący zbugowany eksport do GoogleCalendar z Enrollme
# 9:35 - 11:05 -> 9:30 - 11:00
# 12:50 - 14:20 -> 12:45 - 14:15
# 14:40 - 16:10 -> 14:30 - 16:00
# 17:50 - 19:20 -> 17:45 - 19:15
TIME_MAPPING = {
  '(DTSTART:.+)(T093000)(Z)' => 'T093500',
  '(DTEND:.+)(T110000)(Z)' => 'T110500',
  '(DTSTART:.+)(T124500)(Z)' => 'T125000',
  '(DTEND:.+)(T141500)(Z)' => 'T142000',
  '(DTSTART:.+)(T143000)(Z)' => 'T144000',
  '(DTEND:.+)(T160000)(Z)' => 'T161000',
  '(DTSTART:.+)(T174500)(Z)' => 'T175000',
  '(DTEND:.+)(T191500)(Z)' => 'T192000'
}

if ARGV.count != 2
  puts "usage: ./convert.rb input_file.ics output_file.ics"
  exit
end

input_file = ARGV[0]
output_file = ARGV[1]

input_file_content = File.read(input_file)

#recurring
input_file_content.gsub!('END:VEVENT',"RRULE:FREQ=WEEKLY;UNTIL=20140721T093000Z\nEND:VEVENT")


TIME_MAPPING.each do |k,v|
  input_file_content.gsub!(/#{k}/,'\1' + v +'\3')
end

input_file_content.gsub!(/(DT.+:.+)(T\d{6})(Z)/,'\1\2')

File.write(output_file,input_file_content)