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File name : ferret-browser
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#!/usr/bin/ruby

#$: << File.expand_path(File.join(File.basename(__FILE__), '../lib'))
require 'ferret'
require 'ferret/browser'

require 'optparse'
require 'ostruct'

SERVER_OPTIONS = ['webrick']
conf = OpenStruct.new(:host => '0.0.0.0', :port => 3301)

opts = OptionParser.new do |opts|
  opts.banner = "Usage: #{File.basename($0)} /path/to/index"
  opts.separator ""
  opts.separator "Specific Options:"

  opts.on("-h", "--host HOSTNAME",
          "Host for web server to bind to (default is all IPs)") { |host| conf.host = host }
  opts.on("-p", "--port NUM",
          "Port for web server (defaults to #{conf.port})") { |port| conf.port = port }
  opts.on("-s", "--server NAME",
          "Server to force (#{SERVER_OPTIONS.join(', ')}).") { |s| conf.server = s.to_sym }

  opts.separator ""
  opts.separator "Common options:"
  
  opts.on_tail("-?", "--help", "Show this message") do
    puts opts
    exit
  end
  
  opts.on_tail("-v", "--version", "Show version") do
    puts Ferret::VERSION
    exit
  end
end

opts.parse! ARGV
if ARGV.length != 1
  puts opts
  exit
end
@path = ARGV[0]

# Load the Ferret index
begin
  @reader = Ferret::Index::IndexReader.new(@path)
rescue Ferret::FileNotFoundError => e
  puts "\033[31mCannot start Ferret. No index exists at \"\033[m" + 
    "\033[33m#{@path}\033[m\033[31m\".\033[m"
  exit
rescue Exception => e
  puts "\033[31mCannot start Ferret.\n\033[m\033[33m#{e.to_s}\031[m"
  exit
end

unless conf.server 
  conf.server = :webrick 
end

case conf.server.to_s
when 'webrick'
  require 'webrick/httpserver'
  require 'ferret/browser/webrick'

  # Mount the root
  s = WEBrick::HTTPServer.new(:BindAddress => conf.host, :Port => conf.port)
  s.mount "/s", WEBrick::HTTPServlet::FileHandler, Ferret::Browser::Controller::STATIC_DIR, true
  s.mount "/", WEBrick::FerretBrowserHandler, @reader, @path

  # Server up
  trap(:INT) do
    s.shutdown
  end
  s.start
else
  raise "server #{conf.server} not known. Must be one of [#{SERVER_OPTIONS.join(', ')}]"
end