Gist for "What I Wish a Ruby Programmer Had Told Me One Year Ago".

tdo.rb

class TodoList < Array
	def self.load(file)
		# read the file, create a list, create items, add them to the list, return the list
		list = TodoList.new
		File.read(file).each_line do |line|
			list << line.chomp
		end

		list
	end

	def add(todo)
		if todo.is_a?(TodoItem)
			push(todo)
		else
			push(TodoItem.new(todo))
		end
	end

	alias_method :<<, :add
	
	def mark_done(id)
		self[id - 1].done = true
	end

	def write(file)
		File.open(file, 'w') do |f|
			f.write(reject {|item| item.done?}.join("\n"))
		end
	end
end

class TodoItem
	# provide reader and setter for name and state
	attr_accessor :name, :done
	alias_method :done?, :done

	def initialize(name)
		# store name
		# set state to undone
		@name = name
		@done = false
	end

	def to_s
		@name	
	end
end

class CommandLineInterface
	def initialize
		@list = TodoList.load("todo.td")	
	end

	def done
		@list.done ARGV[1]
	end

	def add
		@list << ARGV[1..-1].join(" ")
	end

	def write
		@list.write("todo.td")
	end

	def list
		@list.each_with_index do |line, index|
			puts "##{index + 1} - #{line.name.capitalize}"
		end
	end
end

cli = CommandLineInterface.new
cli.send ARGV[0]
cli.write