cups-img-backend

#!/usr/bin/env ruby

require 'rbconfig'
STDERR.puts "DEBUG: ruby prefix: #{RbConfig::CONFIG['prefix']}"

require 'rubygems'
require 'tempfile'
require 'fileutils'
require 'json'
require 'etc'
require 'dbus'

module CupsBackend
  class Job
    attr_reader :job_id, :user, :title, :copies, :options, :source
    def initialize(*argv)
      @job_id, @user, @title, @copies, @options, @source = *argv

      @copies = (@copies || 1).to_i
    end

    def read
      if @source
        File.open(@source, 'rb', &:read)
      else
        STDIN.read
      end
    end

    def tmpInput
      File.open("/tmp/rawimg-backend-#{$$}.tmp.#{@job_id}", 'wb') { |fp| fp << self.read }
    end

    def type
      ENV['CONTENT_TYPE'] || 'application/octet-stream'
    end

    def ext
      case type
      when 'image/png'
        "png"
      when 'image/jpeg'
        "jpg"
      when 'application/pdf'
        "pdf"
      else
        "bin"
      end
    end
  end
end

class Notifier < DBus::Object
  dbus_interface "net.livelinktechnology.ImageCapture" do
    # Define a signal in the interface:
    dbus_signal :GotFile, "type:s, path:s, copies:u"
  end
end


if ARGV.size >= 5

job = CupsBackend::Job.new(*ARGV)

# ignore copies
#
STDERR.puts "INFO: Printing page 1"
STDERR.puts "PAGE: 1"

nicename = "job-#{job.job_id}.#{job.ext}"
outfile = "/tmp/#{nicename}"
metafile = "/tmp/#{nicename}.json"

File.open(outfile, 'wb') do |fp|
  fp << job.read
end

File.open(metafile, 'w') do |fp|
  fp << JSON.pretty_unparse({'ENV' => ENV.to_hash, 'ARGV' => ARGV})
end

File.chmod(0644, "/tmp/#{nicename}", outfile, metafile)

bus = DBus.system_bus

notifier = Notifier.new('/net/livelinktechnology/ImageCapture')
service = bus.request_service("net.livelinktechnology.ImageCapture")
service.export(notifier)

notifier.GotFile(job.type, outfile, job.copies)

exit 0

else
  puts %Q[direct #{File.basename $0}:/ "Image Capture" "Img-Cap" "MFG:LiveLink;MDL:Image Capture;DES:LiveLink Image Capture;CLS:PRINTER"]
end