tasks.rb

require 'term/ansicolor'
class String
  include Term::ANSIColor
end

class Task
  attr_accessor :status, :text, :indent_level

  def to_formatted_string
    "#{indent}- #{formatted_status} #{text}"
  end
  
  def initialize(text, status=:todo)
    self.text = text
    self.status = status
    self.indent_level = 0
  end
  
  def formatted_status
    Status[status].to_formatted_string
  end
  
  def indent
    '  ' * indent_level
  end
end

class Status
  @status = {}
  attr_accessor :text, :color, :active

  def self.[](status)
    @status[status.downcase.to_s]
  end
  
  def self.add_status(status)
    @status[status.text.downcase.to_s] = status
  end

  def initialize(text, color, active=false)
    self.text = text
    self.color = color
    self.active = active
    
    self.class.add_status(self)
  end
  
  def to_formatted_string
    colored = text.upcase.send(color)
    active ? colored.negative : colored
  end
end

# Set up statuses
Status.new("todo", :yellow, true)
Status.new("done", :green)
Status.new("later", :green, true)
Status.new("cancel", :yellow)
Status.new('waiting', :magenta)
Status.new("today", :red, true)


# Create a task list
tasks = [
  Task.new('Do a thing'),
  Task.new('Do another thing'),
  Task.new('I\'ll get to it eventually', :later),
  Task.new('Already did it', :done),
  Task.new('Not gonna do it', :cancel),
  Task.new('Do this now', :today)
]

tasks[2].indent_level += 1
puts tasks.map(&:to_formatted_string)