=begin rdoc

= DOWNLOAD.RB

*Author*::      Tamara Temple <tamara@tamaratemple.com>
*Since*::       2013-05-27
*Copyright*::   (c) 2013 Tamara Temple Web Development
*License*::     MIT
  
=end

require 'mechanize'

module Scrapers

  module Download

    def self.download(url,dir=".")
      Scrapers.agent.pluggable_parser.default = Mechanize::Download
      @dir = validate_directory(dir)
      dl = Scrapers.agent.get(url)
      Dir.chdir(@dir) do |dir|
        dl.save()
      end
      File.join(@dir,dl.filename)
    end

    def self.validate_directory(d)
      STDERR.puts caller(0,1).first +
        "d: #{d.inspect}. directory? #{File.directory?(d)}. writable? #{File.writable?(d)}"
      raise "#{d} is not a writable directory!" unless File.directory?(d) and File.writable?(d)
      d
    end

  end
  
end