app.rb

require_relative 'router'
require_relative 'tasks_controller'
require_relative 'tasks_repository'

repo = TasksRepository.new
controller = TasksController.new(repo)

Router.new(controller).run

playground.rb

require_relative 'tasks_repository'
# require_relative 'tasks_view'
require_relative 'tasks_controller'

repo = TasksRepository.new

repo.add_task('eat')
repo.add_task('pray')
repo.add_task('love')
repo.mark_task_as_done_by_index(1)

# view = TasksView.new(repo.all)

# view.list

# view.ask_for_index_to_mark

controller = TasksController.new(repo)

controller.list
puts

controller.add_task
# controller.list
puts

controller.mark_as_done

puts
controller.list

router.rb

class Router
  def initialize(controller)
    @controller = controller
  end

  def run
    loop do
      print_actions
      action = gets.chomp.to_i
      dispatch(action)
    end
  end

  private

  def print_actions
    puts "\n---"
    puts 'What do you want to do?'
    puts '1 - Display tasks'
    puts '2 - Add a new task'
    puts '3 - Mark a task as done'
    puts '4 - Remove a task'
    puts '---'
    print '> '
  end

  def dispatch(action)
    case action
    when 1 then @controller.list
    when 2 then @controller.add_task
    when 3 then @controller.mark_as_done
    when 4 then @controller.destroy
    else
      puts "Please type 1, 2, 3 or 4 :)"
    end
  end
end

task.rb

class Task
  attr_reader :description

  def initialize(description)
    @description = description
    @done = false
  end

  def done?
    @done
  end

  def mark_as_done
    @done = true
  end
end

tasks_controller.rb

require_relative 'tasks_view'

class TasksController
  def initialize(repo)
    @repo = repo
  end

  def list
    view = TasksView.new(@repo.all)

    view.list
  end

  def add_task
    view = TasksView.new(@repo.all)

    description = view.ask_for_new_task_description

    @repo.add_task(description)

    # task = Task.new(description)
    # @repo.add_task(task)
  end

  def mark_as_done
    view = TasksView.new(@repo.all)

    index = view.ask_for_index_to_mark

    @repo.mark_task_as_done_by_index(index - 1)
  end
end

tasks_repository.rb

require_relative 'task'

class TasksRepository
  def initialize
    # TODO: load from CSV
    @tasks = []
  end

  def all
    @tasks
  end

  # def add_task(task)
  #   @tasks << task

  #   save_tasks
  # end

  def add_task(description)
    @tasks << Task.new(description)

    save_tasks
  end

  def remove_task_by_index(index)
    @tasks.delete_at(index)

    save_tasks
  end

  def mark_task_as_done_by_index(index)
    @tasks[index].mark_as_done

    save_tasks
  end

  private

  def save_tasks
    # TODO: save to CSV file
  end
end

tasks_view.rb

class TasksView
  def initialize(tasks)
    @tasks = tasks
  end

  def list
    display_tasks
  end

  def ask_for_new_task_description
    puts "enter description for new task:"
    print '> '
    gets.chomp
  end

  def ask_for_index_to_mark
    display_tasks

    puts "enter index to mark as done:"
    print '> '
    gets.chomp.to_i
  end

  private

  def display_tasks
    @tasks.each_with_index do |task, index|
      puts "#{index+1} : [#{ task.done? ? 'X' : ' ' }] #{task.description}"
    end
  end
end