Script for calculating your happinass from www.trackyourhappiness.org reports

gistfile1.rb

# Script for calculating sumarized happiness
# from raports from www.trackyourhappiness.org
# Reports from surveys have very detailed results,
# but don't have sumarized estimation of your happiness
# during the survey. You can use this script to calculate it
# from data stored in the page of the report
#
# How to use it:
# Fill in SURVEYS array and run "ruby trackyourhappiness.rb"
#
# You have to have ruby installed, check out http://www.ruby-lang.org
# Tested on ruby 1.9.3
class TrackYourHappiness
  # using Firebug in Firefox, or any other your favorite development tool
  # of your favorite browser, check the URL of the image of the "Weekday" chart
  # it starts like this:
  # https://chart.googleapis.com/chart?chs=310x200&cht=bvg...
  # at the end of this URL there is:
  # ...&chd=s%3ACLNcln7&chbh=30
  # so "CLNcln7" (last 7 characters before last "&") is your data.
  # Put this data from all the surveys you filled in this array
  SURVEYS = ["AJRajr5", "CLNcln7"]

  def print
    SURVEYS.each_with_index do |values_string, chart|
      puts "survey #{chart + 1}:"
      values = map_to_values(values_string, chart_dictionary)
      normalized = normalize(values, chart_dictionary.length)
      average = (normalized.inject(:+) / normalized.length).round
      puts "#{average}%, days: #{normalized.inspect} "
    end
  end

  def map_to_values(string, dictionary)
    result = []
    string.each_char { |ch| result << dictionary.index(ch) }
    result
  end

  def chart_dictionary
    return @chart_values if defined?(@chart_values)
    @chart_values = []
    @chart_values += characters_from_range('A'..'Z')
    @chart_values += characters_from_range('a'..'z')
    @chart_values += characters_from_range('0'..'9')
    @chart_values
  end

  def normalize(values, dictionary_size)
    values.map { |value| (100 * Float(value) / (dictionary_size - 1)).round }
  end

  def characters_from_range(range)
    result = []
    range.each { |ch| result << ch }
    result
  end
end

TrackYourHappiness.new.print