Proper todo list!

gistfile1.rb

# encoding: UTF-8

module BoukeTodoApp
  class TodoList
    def initialize(filename)
      @items = []
      @filename = filename

      self.load
    end

    def print
      @items.each do |item|
        puts item
      end
    end

    def each
      @items.each { |item| yield item }
    end

    def cli(argv)
      if argv.size == 0
        self.print
      else
        command = argv[0]
        arguments = argv[1, argv.size - 1]

        case command
        when 'list'
          self.print
        when 'add'
          if arguments.size == 0
            puts %(USAGE: #{$0} add "todo list item")
          else
            arguments.each { |contents|
              self.add contents
            }
          end
        when 'remove'
          if arguments.size == 0
            puts %(USAGE: #{$0} remove "todo list item")
          else
            arguments.each { |contents|
              self.remove contents
            }
          end
        when 'done'
          if arguments.size == 0
            puts %(USAGE: #{$0} done "todo list item")
          else
            arguments.each { |contents|
              self.done contents
            }
          end
        else
          puts "Unknown action"
        end
      end
    end

    def add(contents)
      @items << Item.new(contents, false)
    end

    def remove(contents)
      @items.delete_if { |item| item.contents == contents }
    end

    def done(contents)
      @items.find_all { |item| item.contents == contents }.each { |item| item.done = true }
    end

    def load
      if File.exists? @filename
        File.open(@filename) do |f|
          lines = f.read().split("\n").map! { |item| [item[0], item[1, item.size - 1]] }
          lines.each do |done, contents|
            @items << Item.new(contents, done.to_i == 1) if done and contents
          end
        end
      end
    end

    def save
      File.open(@filename, 'w') do |f|
        @items.each { |item|
          f.write(item.done ? "1" : "0")
          f.write(item.contents)
          f.write("\n")
        }
      end
    end

    class Item
      attr_accessor :done, :contents

      def initialize(contents, done=false)
        @contents = contents
        @done = done
      end

      def to_s
        (@done ? "✓" : "✗") + " " +  @contents
      end
    end
  end
end

if __FILE__ == $0
  todo_list = BoukeTodoApp::TodoList.new("list.todo")
  todo_list.cli(ARGV)
  todo_list.save
end