#!/usr/bin/env ruby
#
#  USAGE::
#
#    script/resize_images [number_of_images]
#
#  DESCRIPTION::
#
#  This is intended to run once a minute from the crontab.  It goes through all
#  of the original images and re-creates the 640x640 and 160x160 images.  Pass
#  in the number to do (defaults to 5 images at a time).  It sleeps for two
#  seconds between each image.  It writes out a log of the images it's done,
#  and reads this back in each time it runs so it knows where it left off.  It
#  processes the images in completely random order until they are all done, in
#  which case it does nothing.  Look at the log to get a list of images that
#  failed -- they are marked with leading "#" marks. 
#
################################################################################

ORIG = File.expand_path('../../public/images/orig', __FILE__)
DONE = File.expand_path('../../log/resize_image.log', __FILE__)

limit = ARGV[0].to_i
limit = 5 if limit == 0

if !File.exists?(DONE)
  File.open(DONE, "w") do |file|
  end
end

done = {}
File.open(DONE) do |file|
  file.each_line do |line|
    done[line.strip.sub(/^#/, '')] = true
  end
end

num = 0
Dir.foreach(ORIG) do |file|
  if file.match(/(\d+)\.jpg/) && !done[id = $1]
    file = "#{ORIG}/#{file}"
    file2 = file.sub('orig', '640')
    file3 = file.sub('orig', 'thumb')
    # if system("convert -thumbnail '640x640>' -quality 70 #{file} #{file2}") and
    #    system("convert -thumbnail '160x160>' -quality 90 #{file} #{file3}")
    if system("jpegresize 640x640 -q 70 --max-size #{file} #{file2}") and
       system("jpegresize 160x160 -q 90 --max-size #{file} #{file3}")
      File.open(DONE, 'a') do |log|
        log.puts id
      end
    else
      File.open(DONE, 'a') do |log|
        log.puts '#' + id.to_s
      end
    end
    num += 1
    break if num >= limit
    sleep 2
  end
end

exit 0