Serious changes (Day 3) [SLiSW]

=begin
It's day 3, and the last day of ruby! Has everyone can see, it's getting really hard! Well, if you paid attention since the begining it's not to hard. I don't know if I will share another exercise or not, but anyway. I hope everyone enjoy ;)
=end

=begin
the file is like this
----------------rubycsv.txt-----------
one, two
lions, tigers
cats, dogs
bird, fish
--------------------------------------
=end





module ActsAsCsv
    def self.included(base)
        base.extend ClassMethods
    end
    module ClassMethods
        def acts_as_csv
            include InstanceMethods
        end
    end

    module InstanceMethods
        attr_accessor :headers, :csv_contents
        def initialize
            read
        end
        def read
            @csv_contents = []
            filename = self.class.to_s.downcase + '.txt'
            file = File.new(filename)
            @headers = file.gets.chomp.split(', ')

            file.each do |row|
                @csv_contents << CsvRow.new(@headers, row.chomp.split(', '))
            end
        end
        def each
            @csv_contents.each { |row| yield row }
        end

        class CsvRow
            def initialize headers, row
                @headers = headers
                @row = row
            end
            def method_missing name, *args, &block
                index = @headers.index(name.to_s)
                if index
                    @row[index]
                else
                    "Can not find"
                end
            end
        end

    end
end

class RubyCsv  # no inheritance! You can mix it in
    include ActsAsCsv
    acts_as_csv
end

m = RubyCsv.new
puts m.headers.inspect
puts m.csv_contents.inspect

m.each { |row| puts "#{row.one}, #{row.two}" }