#-- vim:sw=2:et:ft=ruby

GOOGLE_SEARCH = "http://www.google.com/search?oe=UTF-8&q="
GOOGLE_WAP_SEARCH = "http://www.google.com/m/search?hl=en&q="
GOOGLE_WAP_LINK = /<a accesskey="(\d)" href=".*?u=(.*?)">(.*?)<\/a>/im
GOOGLE_CALC_RESULT = %r{<img src=/images/calc_img\.gif(?: width=40 height=30 alt="")?></td><td>&nbsp;</td><td nowrap>(?:<h2 class=r>)?<font size=\+1><b>(.+)</b>(?:</h2>)?</td>}
GOOGLE_DEF_RESULT = %r{<p> (Web definitions for .*?)<br/>(.*?)<br/>(.*?)\s-\s+<a href}

class GentooSearchPlugin < Plugin
  def listen(m)
    #return if m.address?
    return if m.message !~ /^\? (.+)$/i
    search = $1
    #m.reply "doing search for #{search}"
    params = {}
    params[:words] = search
    return gentoo_search(m, params)
  end

  def gentoo_search(m, params)
    params[:site] = 'gentoo.org'
    return google(m, params)
  end
  
  def google(m, params)
    what = params[:words].to_s
    searchfor = CGI.escape what
    # This method is also called by other methods to restrict searching to some sites
    if params[:site]
      site = "site:#{params[:site]}+"
    else
      site = ""
    end
    # It is also possible to choose a filter to remove constant parts from the titles
    # e.g.: "Wikipedia, the free encyclopedia" when doing Wikipedia searches
    filter = params[:filter] || ""

    url = GOOGLE_WAP_SEARCH + site + searchfor

    hits = params[:hits] || @bot.config['google.hits']

    first_pars = params[:firstpar] || @bot.config['google.first_par']

    single = (hits == 1 and first_pars == 1)

    begin
      wml = @bot.httputil.get(url)
      raise unless wml
    rescue => e
      m.reply "error googling for #{what}"
      return
    end
    results = wml.scan(GOOGLE_WAP_LINK)
    if results.length == 0
      m.reply "no results found for #{what}"
      return
    end
    single ||= (results.length==1)
    urls = Array.new
    results = results[0...hits].map { |res|
      n = res[0]
      t = Utils.decode_html_entities res[2].gsub(filter, '').strip
      u = URI.unescape res[1]
      urls.push(u)
      single ? u : "#{n}. #{Bold}#{t}#{Bold}: #{u}"
    }.join(" | ")

    # If we return a single, full result, change the output to a more compact representation
    if single
      m.reply "Result for %s: %s -- %s" % [what, results, Utils.get_first_pars(urls, first_pars)], :overlong => :truncate
      return
    end

    m.reply "Results for #{what}: #{results}", :split_at => /\s+\|\s+/

    return unless first_pars > 0

    Utils.get_first_pars urls, first_pars, :message => m

  end
end

plugin = GentooSearchPlugin.new

#plugin.map "? *words", :action => 'gentoo_search', :threaded => true