# frozen_string_literal: true

module Attractor
  # converts a duration string into an amount of days
  class DurationParser
    TOKENS = {
      'd' => 1,
      'w' => 7,
      'm' => 30,
      'y' => 365
    }.freeze

    attr_reader :duration

    def initialize(input)
      @input = input
      @duration = 0
      parse
    end

    def parse
      @input.scan(/(\d+)(\w)/).each do |amount, measure|
        @duration += amount.to_i * TOKENS[measure]
      end
    end
  end
end