test_todo.rb

# test_todo.rb
require './todo.rb'

new_list = ListItemParser.new('todo.csv')
new_list.parse_list

new_list.add_list_item('add list item')

todo.csv

id,todo_text,completed,false
1,Move with Lil to the black mountain hills of Dakota,false
2,Lose Lil to Danny,false
3,Get hit in the eye by Danny,false
4,Walk into town seeking revenge,false
5,Book room at local saloon,false
6,Check into room and read Gideon's bible,false
7,Drink too much gin,false
8,Overhear Lil and Danny in neighboring room,false
9,Burst into neighboring room and declare a showdown,false
10,Get shot by Danny and collapse in corner,false
11,Visit doctor,false
12,Return to room and read Gideon's bible,false
13,Sing along! D'do d'do d'do do do d'do d'do d'do,false

todo.rb

require 'csv'

# What classes do you need?

# Remember, there are four high-level responsibilities, each of which have multiple sub-responsibilities:
# 4. Manipulating the in-memory objects that model a real-life TODO list (domain-specific model)

# Note that (4) is where the essence of your application lives.
# Pretty much every application in the universe has some version of responsibilities (1), (2), and (3).


class ListItem
  attr_accessor :id, :todo_text, :completed

  def initialize(args = {})
    @id         = args[:id]
    @todo_text  = args[:todo_text]
    @completed  = args[:completed]
  end

  def join
    [:id, :todo_text, :completed]
  end
end


class TodoList
# Displaying information to the user (view)

  def self.display_list(display_input)
    display_input.each { |i| puts "#{i.id}.\t #{i.todo_text}" }
  end
end


class InputController



end


class ListItemParser
# Gathering user input and taking the appropriate action (controller)
# Reading and writing from the todo.txt file (model)

  OPTIONS = {:headers => true, :header_converters => :symbol}

  attr_accessor :todos
  attr_reader :file

  def initialize(file)
    @file     = file
    @todos  ||= []
  end

  def parse_list
    CSV.foreach(file, OPTIONS) { |row| todos << ListItem.new(row) }
    return todos if todos
  end

  def add_list_item(item)
    todos << ListItem.new({ :id         => next_item_number, 
                            :todo_text  => item, 
                            :completed  => false})
    TodoList.display_list(todos)
  end

  def next_item_number
    todos.last.id.to_i + 1
  end
end