From 3705398481c7d08d2f2648789d370530fe3abdd7 Mon Sep 17 00:00:00 2001
From: MoisesMachado <MoisesMachado@3f533792-8f58-4932-b0fe-aaf55b0a4547>
Date: Wed, 9 Jan 2008 22:44:25 +0000
Subject: [PATCH] ActionItem128: filtered stop words from the query

---
 app/controllers/public/search_controller.rb |  3 ++-
 app/helpers/search_helper.rb                |  9 +++++++++
 test/functional/search_controller_test.rb   |  7 +++++++
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/app/controllers/public/search_controller.rb b/app/controllers/public/search_controller.rb
index 603f292..cf9201e 100644
--- a/app/controllers/public/search_controller.rb
+++ b/app/controllers/public/search_controller.rb
@@ -39,7 +39,8 @@ class SearchController < ApplicationController
 
   def index
     @query = params[:query] || ''
-    @results = search(@query)
+    @filtered_query = remove_stop_words(@query)
+    @results = search(@filtered_query)
   end
 
   def tags
diff --git a/app/helpers/search_helper.rb b/app/helpers/search_helper.rb
index 35ee5ba..76e416a 100644
--- a/app/helpers/search_helper.rb
+++ b/app/helpers/search_helper.rb
@@ -1,8 +1,17 @@
 module SearchHelper
 
+  STOP_WORDS = {
+    'pt_BR' => Ferret::Analysis::FULL_PORTUGUESE_STOP_WORDS,
+    'en'    => Ferret::Analysis::FULL_ENGLISH_STOP_WORDS,
+  }
+  
   def relevance_for(hit)
     n = (hit.ferret_score if hit.respond_to?(:ferret_score))
     n ||= 1.0
     (n * 100.0).round
   end
+
+  def remove_stop_words(query)
+    (query.downcase.split(' ') - STOP_WORDS[Locale.current.to_s]).join(' ')
+  end
 end
diff --git a/test/functional/search_controller_test.rb b/test/functional/search_controller_test.rb
index c1a9203..4d5ff68 100644
--- a/test/functional/search_controller_test.rb
+++ b/test/functional/search_controller_test.rb
@@ -21,4 +21,11 @@ class SearchControllerTest < Test::Unit::TestCase
 
   end
 
+  should 'filter stop words' do
+    get 'index', :query => 'a carne da vaca'
+    assert_response :success
+    assert_template 'index'
+    assert_equal 'carne vaca', assigns('filtered_query')
+  end
+
 end
--
libgit2 0.21.2