NaNoWriMo helper script. Gives you a quick summary of progress so far.

na_no_bot.rb

#!/usr/bin/env ruby

class NaNoBot
  TARGET_WORDS = 50000
  TOTAL_DAYS   = 30

  WELL_DONE = [
    "Get in!",
    "Doing great!",
    "Nice job!",
    "Keep it up!"
  ]

  PEP_TALK = [
    "You can do it!",
    "It's not too late to catch up!",
    "A bit of extra effort will get you passed the slump!",
    "Ach well, it's only for fun ;)"
  ]

  attr_reader :word_count

  def initialize(file_name)
    @word_count = calc_word_count(file_name)
  end

  def words_to_go
    TARGET_WORDS - word_count
  end

  def avg_per_day
    word_count / days_in
  end

  def avg_to_complete
    return words_to_go unless days_to_go > 0
    words_to_go / days_to_go
  end

  def random_platitude
    if word_count < target_word_count
      PEP_TALK.sample
    else
      WELL_DONE.sample
    end
  end

  private

  def calc_word_count(file_name)
    File.open(file_name) do |f|
      f.each_line.inject(0) {|count, line| count += line.scan(/\w+/).count }
    end
  end

  def days_in
    Time.now.mday
  end

  def days_to_go
    TOTAL_DAYS - days_in
  end

  def target_word_count
    days_in * target_wpd
  end

  def target_wpd
    TARGET_WORDS / TOTAL_DAYS
  end
end

nanobot = NaNoBot.new(ARGV.shift)
puts "So far:                #{nanobot.word_count}"
puts "To go:                 #{nanobot.words_to_go}"
puts "WPD so far:            #{nanobot.avg_per_day}"
puts "WPD req'd to complete: #{nanobot.avg_to_complete}"
puts
puts nanobot.random_platitude