class FileReader

  def self.read_dictionary(dictionary)
    read_file(path_to_dictionary(dictionary))
  end

  def self.read_format(format)
    read_file(path_to_format(format))
  end

protected

  def self.read_file(file)
    lines = []
    IO.foreach(file) do |line|
      lines << line.chomp unless line.chomp == ''
    end
    lines
  end

  def self.path_to_format(format)
    if external_path_to_format(format) && File.exists?(external_path_to_format(format))
      external_path_to_format(format)
    else
      internal_path_to_format(format)
    end
  end

  def self.external_path_to_format(format)
    RAILS_ROOT + '/lib/forgery/formats/' + format.to_s if defined?(RAILS_ROOT)
  end

  def self.internal_path_to_format(format)
    File.dirname(__FILE__) + '/formats/' + format.to_s
  end

  def self.path_to_dictionary(dictionary)
    if external_path_to_dictionary(dictionary) && File.exists?(external_path_to_dictionary(dictionary))
      external_path_to_dictionary(dictionary)
    else
      internal_path_to_dictionary(dictionary)
    end
  end

  def self.external_path_to_dictionary(dictionary)
    RAILS_ROOT + '/lib/forgery/dictionaries/' + dictionary.to_s if defined?(RAILS_ROOT)
  end

  def self.internal_path_to_dictionary(dictionary)
    File.dirname(__FILE__) + '/dictionaries/' + dictionary.to_s
  end

end