X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;ds=inline;f=data%2Frbot%2Fplugins%2Fsearch.rb;h=27f9519c37b4d5e3bec5bbda080380526371bed9;hb=6fe052181de09dd4a618241e600e2473f6706343;hp=c44100b1abaa106ba5367f683223b599200906ff;hpb=4911de2a2b6bc373ef7d5e73f34a14133c07b5e5;p=user%2Fhenk%2Fcode%2Fruby%2Frbot.git

diff --git a/data/rbot/plugins/search.rb b/data/rbot/plugins/search.rb
index c44100b1..27f9519c 100644
--- a/data/rbot/plugins/search.rb
+++ b/data/rbot/plugins/search.rb
@@ -4,34 +4,83 @@ Net::HTTP.version_1_2
 
 GOOGLE_WAP_LINK = /<a accesskey="(\d)" href=".*?u=(.*?)">(.*?)<\/a>/im
 
+class ::String
+  def ircify_html
+    txt = self
+
+    # bold and strong -> bold
+    txt.gsub!(/<\/?(?:b|strong)\s*>/, "#{Bold}")
+
+    # italic, emphasis and underline -> underline
+    txt.gsub!(/<\/?(?:i|em|u)\s*>/, "#{Underline}")
+
+    ## This would be a nice addition, but the results are horrible
+    ## Maybe make it configurable?
+    # txt.gsub!(/<\/?a( [^>]*)?>/, "#{Reverse}")
+
+    # Paragraph and br tags are converted to whitespace.
+    txt.gsub!(/<\/?(p|br)\s*\/?\s*>/, ' ')
+    txt.gsub!("\n", ' ')
+
+    # All other tags are just removed
+    txt.gsub!(/<[^>]+>/, '')
+
+    # Remove double formatting options, since they only waste bytes
+    txt.gsub!(/#{Bold}\s*#{Bold}/,"")
+    txt.gsub!(/#{Underline}\s*#{Underline}/,"")
+
+    # And finally whitespace is squeezed
+    txt.gsub!(/\s+/, ' ')
+
+    # Decode entities and strip whitespace
+    return Utils.decode_html_entities(txt).strip!
+  end
+end
+
 class SearchPlugin < Plugin
+  BotConfig.register BotConfigIntegerValue.new('google.hits',
+    :default => 3,
+    :desc => "Number of hits to return from Google searches")
+  BotConfig.register BotConfigIntegerValue.new('google.first_par',
+    :default => 0,
+    :desc => "When set to n > 0, the bot will return the first paragraph from the first n search hits")
+  BotConfig.register BotConfigIntegerValue.new('wikipedia.hits',
+    :default => 3,
+    :desc => "Number of hits to return from Wikipedia searches")
+  BotConfig.register BotConfigIntegerValue.new('wikipedia.first_par',
+    :default => 1,
+    :desc => "When set to n > 0, the bot will return the first paragraph from the first n wikipedia search hits")
+
   def help(plugin, topic="")
     case topic
-    when "search"
-    "search <string> => search google for <string>"
-    when "google"
-    "google <string> => search google for <string>"
+    when "search", "google"
+      "#{topic} <string> => search google for <string>"
     when "wp"
       "wp [<code>] <string> => search for <string> on Wikipedia. You can select a national <code> to only search the national Wikipedia"
     else
-    "search <string> (or: google <string>) => search google for <string> | wp <string> => search for <string> on Wikipedia"
+      "search <string> (or: google <string>) => search google for <string> | wp <string> => search for <string> on Wikipedia"
     end
   end
 
   def google(m, params)
     what = params[:words].to_s
     searchfor = URI.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 = "http://www.google.com/wml/search?q=#{site}#{searchfor}"
 
+    hits = params[:hits] || @bot.config['google.hits']
 
     begin
-      wml = @bot.httputil.get(url)
+      wml = @bot.httputil.get_cached(url)
     rescue => e
       m.reply "error googling for #{what}"
       return
@@ -41,17 +90,74 @@ class SearchPlugin < Plugin
       m.reply "no results found for #{what}"
       return
     end
-    results = results[0...3].map { |res|
-      "#{res[0]}. #{Bold}#{Utils.decode_html_entities res[2].strip}#{Bold}: #{URI.unescape res[1].strip}"
+    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)
+      "#{n}. #{Bold}#{t}#{Bold}: #{u}"
     }.join(" | ")
 
-    m.reply "Results for #{what}: #{results}"
+    m.reply "Results for #{what}: #{results}", :split_at => /\s+\|\s+/
+
+    first_pars = params[:firstpar] || @bot.config['google.first_par']
+
+    idx = 0
+    while first_pars > 0 and urls.length > 0
+      url.replace(urls.shift)
+      idx += 1
+
+      # FIXME what happens if some big file is returned? We should share
+      # code with the url plugin to only retrieve partial file content!
+      xml = @bot.httputil.get_cached(url)
+      if xml.nil?
+        debug "Unable to retrieve #{url}"
+        next
+      end
+      # We get the first par after the first main heading, if possible
+      header_found = xml.match(/<h1(?:\s+[^>]*)?>(.*?)<\/h1>/im)
+      txt = String.new
+      if header_found
+        debug "Found header: #{header_found[1].inspect}"
+        while txt.empty? 
+          header_found = $'
+          candidate = header_found[/<p(?:\s+[^>]*)?>.*?<\/p>/im]
+          break unless candidate
+          txt.replace candidate.ircify_html
+        end
+      end
+      # If we haven't found a first par yet, try to get it from the whole
+      # document
+      if txt.empty?
+	header_found = xml
+        while txt.empty? 
+          candidate = header_found[/<p(?:\s+[^>]*)?>.*?<\/p>/im]
+          break unless candidate
+          txt.replace candidate.ircify_html
+          header_found = $'
+        end
+      end
+      # Nothing yet, try title
+      if txt.empty?
+        debug "No first par found\n#{xml}"
+	# FIXME only do this if the 'url' plugin is loaded
+	txt.replace @bot.plugins['url'].get_title_from_html(xml)
+        next if txt.empty?
+      end
+      m.reply "[#{idx}] #{txt}", :overlong => :truncate
+      first_pars -=1
+    end
   end
 
   def wikipedia(m, params)
     lang = params[:lang]
     site = "#{lang.nil? ? '' : lang + '.'}wikipedia.org"
+    debug "Looking up things on #{site}"
     params[:site] = site
+    params[:filter] = / - Wikipedia.*$/
+    params[:hits] = @bot.config['wikipedia.hits']
+    params[:firstpar] = @bot.config['wikipedia.first_par']
     return google(m, params)
   end
 end