ProgressBar

gistfile1.rb

module ProgressBar
  class << self
    def progress_bar(items_count, current_item_index, prefix)
      @@start_time = Time.now if current_item_index == 0

      time     = Time.now - @@start_time
      progress = current_item_index.next.to_f / items_count.to_f * 100
      bar      = "▓" * ( 50 * (progress / 100 ) ).floor
      minutes  = ((time / progress) * (100 - progress) / 60).round
      left_str = "#{minutes} minutes left   "

      "#{ prefix } ├#{ bar.ljust 50 }┤#{ (progress.round(1).to_s + "%").rjust(6).red } (#{ current_item_index.next } of #{ items_count }) #{ left_str }\r"
    end
  end
end