#!/usr/bin/env ruby
#
# ./chef-indexer - Build indexes from Chef Queues!
#
# Author:: Adam Jacob (<adam@hjksolutions.com>)
# Copyright:: Copyright (c) 2008 HJK Solutions, LLC
# License:: GNU General Public License version 2 or later
# 
# This program and entire repository is free software; you can
# redistribute it and/or modify it under the terms of the GNU 
# General Public License as published by the Free Software 
# Foundation; either version 2 of the License, or any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#

$: << File.join(File.dirname(__FILE__), "..", "lib")

require 'optparse'
require 'chef'
require 'rubygems'
require 'facter'

config = {
  :config_file => "/etc/chef/config.rb",
  :log_level => :info
}
opts = OptionParser.new do |opts|
  opts.banner = "Usage: #{$0} [-d DIR|-r FILE] (options)"
  opts.on("-c CONFIG", "--config CONFIG", "The Chef Config file to use") do |c|
    config[:config_file] = c
  end
  opts.on_tail("-l LEVEL", "--loglevel LEVEL", "Set the log level (debug, info, warn, error, fatal)") do |l|
    config[:log_level] = l.to_sym
  end
  opts.on_tail("-h", "--help", "Show this message") do
    puts opts
    exit
  end
end
opts.parse!(ARGV)

unless File.exists?(config[:config_file]) && File.readable?(config[:config_file])
  puts "I cannot find or read the config file: #{config[:config_file]}"
  puts opts
  exit
end

# Load our config file
Chef::Config.from_file(config[:config_file])
if config[:log_level]
  Chef::Log.level(config[:log_level].to_sym)
end

# Get a Chef::SearchIndex object
indexer = Chef::SearchIndex.new
Chef::Queue.connect
Chef::Queue.subscribe(:queue, "index")
Chef::Queue.subscribe(:queue, "remove")
while 1
  begin
    object, headers = Chef::Queue.receive_msg
    Chef::Log.info("Headers #{headers.inspect}")
    if headers["destination"] == "/queue/chef/index"
      start_timer = Time.new
      indexer.add(object)
      indexer.commit
      final_timer = Time.new
      Chef::Log.info("Indexed object from #{headers['destination']} in #{final_timer - start_timer} seconds")
    elsif headers["destination"] == "/queue/chef/remove"
      start_timer = Time.new
      indexer.delete(object)
      indexer.commit
      final_timer = Time.new
      Chef::Log.info("Removed object from #{headers['destination']} in #{final_timer - start_timer} seconds")
    end
  rescue Exception => e
    if e.kind_of?(Interrupt)
      raise e
    end
    Chef::Log.error("Received Exception: #{e}\n#{e.backtrace.join("\n")} continuing")
  end
end