#coding=utf-8

module Trustie
  module Utils
    class Image
      def initialize(file, bak)
        @file = file
        @bak = bak
      end

      def compress(size=300)
        backup if @bak
        begin
          f = Magick::ImageList.new(@file)
          if f.format != 'GIF'
            width = size
            if f[0].columns > width
              proportion = (width/f[0].columns.to_f)
              height = (f[0].rows*proportion)
              f.resize_to_fill!(width,height.to_i)
              f.write(@file)
            end
          end
        rescue Exception => e
          Rails.logger.error "[Error] compress : ===> #{e}"
        end
      end

      def backup
        FileUtils.cp @file, "#{@file}.bak" 
      end

    end
  end
end