Raffle off items with ruby.

raffle.rb

#!/usr/bin/env ruby
# 
# raffle.rb - Raffle off items with ruby. Version 0.2
# Made with ❤︎ by [email protected]
#
# To use cd into a directory with a 'tickets.txt'
# file and a 'items.txt' file.  Then just run the
# script.  Items in the files should be separated
# by new lines.

say = false

## Why Ruby have no titlecase?
class String
  def titlecase
    title = self.split
    title.map do |word|
      unless (word.include?("of")) || (word.include?("the")) && (title.first != "the")
        word.capitalize
      end
    end.join(" ")
  end
end

## Load files, reformat, and remove duplicates.
abort "Could not find 'tickets.txt' in '#{Dir.getwd}/'" unless File.exists?("tickets.txt") # Look for files.
abort "Could not find 'items.txt' in '#{Dir.getwd}/'"   unless File.exists?("items.txt")   #  Abort if files can't be found.
tickets = IO.readlines("tickets.txt").map(&:downcase).map(&:strip).sort.uniq               # Read files, reformat, and remove duplicates.
items   =   IO.readlines("items.txt").map(&:downcase).map(&:strip).sort.uniq               #   Reformatting will strip extra whitespace and lowercase everything.
puts "Found #{tickets.count} tickets and #{items.count} items."                            # Count tickets and items.
abort "Not enough tickets for all the items!" if tickets.count < items.count               # Exit if there are not enough tickets.

## Choose winners.
winners = Hash.new
items.each do |item|
  winner = tickets.sample                                # Pick a random ticket.
  winner = tickets.sample while winners.include?(winner) # Redraw if winner has already been chosen.
  winners[winner] = item                                 # Add winner to list.
end
winners = winners.sort_by { |ticket,item| ticket }       # Sort winners by name.

## Build Anticipation
print " Picking from a hat\r"
sleep 1
print " Picking from a hat.\r"
sleep 1
print " Picking from a hat..\r"
sleep 1
print " Picking from a hat...\r"
sleep 1
puts "                     "

## Print winners to file and screen.
File.open("winners.csv", "w+") do |f|                                  # Open or create winners file.
  f.puts("Ticket,Item")                                                # Write head of CSV file.
  winners.each { |ticket,item| f.puts("#{ticket.titlecase},#{item}") } # Write winners in CSV format to file.
end
winners.each { |ticket,item| puts "#{ticket.titlecase} has won #{item}."; `say "#{ticket.titlecase} has won!"` if say == true; sleep 0.4 } # Print winners to screen.
puts