todo.csv

Move with Lil to the black mountain hills of Dakota
Lose Lil to Danny
Get hit in the eye by Danny
Walk into town seeking revenge
Book room at local saloon
Check into room and read Gideon's bible
Drink too much gin
Overhear Lil and Danny in neighboring room
Burst into neighboring room and declare a showdown
Get shot by Danny and collapse in corner
Visit doctor
Return to room and read Gideon's bible
Sing along! D'do d'do d'do do do d'do d'do d'do

todo.rb

require 'csv'

class List
  attr_accessor :id_numbers, :list

  def initialize(filename)
    @filename = filename
    @list = []
    @id_numbers = (1..1000).to_a 
    import_tasks
  end

  def import_tasks
    CSV.foreach(@filename){|row| @list << row}
    @list.map! {|item| Tasks.new({id: @id_numbers.shift, text: item[0]})}
    save_task
  end

  def add_task(text) 
    @list << Tasks.new({id: @id_numbers.shift, text: text})
    save_task
  end

  def save_task
    CSV.open(@filename, "wb") do |csv| 
      @list.each {|list_item| csv << [list_item.text]}
    end
  end

  def to_human!
    CSV.open(@filename, "wb") do |csv| 
      @list.each do |list_item| 
        csv << ["#{list_item.id}. [ ] #{list_item.text}"] unless list_item.complete
        csv << ["#{list_item.id}. [X] #{list_item.text}"] if list_item.complete
      end
    end
  end

  def delete_task(id)
    @list.delete_if { |task| task.id == id }
    save_task
  end

  def display_all_tasks
    @list.each do |task|
      puts "#{task.id} #{task.text} -- #{task.complete}"
    end
  end

  def complete_task(id)
    @list.each {|item| item.complete = true if item.id == id}
  end
end


class Tasks

  attr_accessor :complete
  attr_reader :id, :text

  def initialize(args)
    @text = args[:text]
    @id = args[:id]
    @complete = false
  end

end

list_son = List.new('todo2.csv')

if ARGV.any?
  list_son.add_task(ARGV[1..-1][0]) if ARGV[0] == "add"
  list_son.delete_task(ARGV[1].to_i) if ARGV[0] == "delete"
  list_son.complete_task(ARGV[1].to_i) if ARGV[0] == "complete"
  list_son.to_human! if ARGV[0] == "convert!"
  list_son.display_all_tasks
end