module Atchoum
  # Reloads the application whenever the script is changed.
  # Inspired by _why's Camping Reloader
  # http://code.whytheluckystiff.net/svn/camping/trunk/lib/camping/reloader.rb
  class Reloader
    attr_reader :class_name, :instance
    
    def initialize(script)
      @script = File.expand_path(script)
      @class_name = script.scan(/(\w+).rb$/)[0].first.capitalize.gsub(/_(\w)/) { $1.to_s.upcase }
    end
    
    def find_class
      @klass = Object.const_get(Object.constants.grep(/^#{@class_name}$/i)[0]) rescue nil
      @instance = @klass.new
    end
        
    def unload_class
      Object.send :remove_const, @klass.name if @klass
      @klass = nil
      @instance = nil
    end

    # Reload the script
    def reload
      # TODO maybe check for timestamp ?
      unload_class
      load @script
      find_class
    end
  end
end