Creating KML data by converting ManyTime app data

On Mac, this ruby script translates ManyTime data to KML data.

This ruby script performs and translates the manytime-2.txt file
to the output.txt file. It works in the terminal on Mac OS X 10.8.5.
The Ruby 1.8.7 is used.

$ ruby convertKML.rb manytime-2.txt > output.kml

manytime-2.txt:

2013-12-05 21:18:00 2013-12-05 21:23:00  [2013-12-05 21:20:51,34.985458,135.757755]
2013-12-05 22:25:00 2013-12-05 22:30:00  [2013-12-05 22:25:56,35.039370,135.729243]

output.txt:

  2013-12-05 21:20:51
  
  135.757755,34.985458,undefined


  2013-12-05 22:25:56
  
  135.729243,35.039370,undefined

convertKML.rb:

#From the argument aString that is the result of the pattern match, 
#create a  row to output.
def nameString(aMatchString)
  withoutParentheses = aMatchString.sub(/\[/,"")
  withoutParentheses = withoutParentheses.sub(/\]/,"")
  anArray = withoutParentheses.split(",")
  return "#{anArray[0]}"
end

#From the argument previousString that is a string in front of the pattern match result, 
#create a  row to output.
def descriptionString(previousMatchString)
  return ""
end

#From the argument aCoordinates that is an array of coordinate value data, 
#create a  row to output. Height data does not exist, so output "undefined".
def pointString(aCoordinates)
  #In  row, it is output in the form  longitude, latitude, height .
  return "#{aCoordinates[7]},#{aCoordinates[6]},undefined"
end

#From the argument aCoordinates that is an array of coordinates values, 
#create a string of the coordinates value.
def coordinatesString(aCoordinates)
  #For example, it returns the string form of "2013-11-21 18:35:46,34.555555,135.777777".
  date = "#{aCoordinates[0]}-#{aCoordinates[1]}-#{aCoordinates[2]}"
  time = "#{aCoordinates[3]}:#{aCoordinates[4]}:#{aCoordinates[5]}"
  coordinates = "#{aCoordinates[6]},#{aCoordinates[7]}"
  return "#{date} #{time},#{coordinates}"
end

aHash = Hash.new
File.open(ARGV[0], "r") {
  | f |
  puts ""
  puts ""
  puts ""
  while line = f.gets
    #Create an array with coordinate values ​​that match the regular expression. 
    #Specify the pattern, for example, to match "2013-11-21 18:35:46,34.555555,135.777777".
    coordinatesArray = line.scan(/\[([1]{1}[9]{1}[9]{1}\d{1}|[2-9]{1}\d{3})-([0,1]?\d{1})-([0-2]?\d{1}|[3][0,1]{1})\s([0]?\d|1\d|2[0-3]):([0-5]\d):([0-5]\d),(\-?\d{1,2}\.\d{6}),(\-?\d{1,3}\.\d{6})\]/)
    #If there is a matched coordinates value in the line, perform text output process.
    if (coordinatesArray.length > 0)
      #Get the last coordinates value ​​from the results of the scan.
      lastCoordinates = coordinatesArray.last
      #Get a string of coordinates value ​​from an array of coordinates values.
      aCoordinatesString = coordinatesString(lastCoordinates)
      #Create the condition of pattern matching.
      aMatch = "\\[" + aCoordinatesString + "\\]"
      #Pattern-match the last coordinates value in the line.
      /#{aMatch}/ =~ line
      puts ""
      puts "  #{nameString($&)}"
      puts "  #{descriptionString($`)}"
      puts "  #{pointString(lastCoordinates)}"
      puts ""
    end
  end
  puts ""
  puts ""
}