Suppress search in topic unless we have more than 10 posts

(configurable in site setting)

config/locales/server.en.yml

@@ -799,6 +799,7 @@ en:
 
     dominating_topic_minimum_percent: "What percentage of posts a user has to make in a topic before we consider it dominating."
     suppress_uncategorized_badge: "Don't show the badge for uncategorized topics in topic lists"
+    min_posts_for_search_in_topic: "Disable search within topic if topics have less than minimum number posts"
 
     enable_names: "Allow users to show their full names"
     display_name_on_posts: "Also show a user's full name on their posts"

config/site_settings.yml

@@ -437,4 +437,5 @@ uncategorized:
   meta_category_id:
     default: -1
     hidden: true
+  min_posts_for_search_in_topic: 10
 

lib/search.rb

@@ -46,6 +46,10 @@ class Search
     @search_context = @opts[:search_context]
     @limit = Search.per_facet * Search.facets.size
     @results = GroupedSearchResults.new(@opts[:type_filter])
+
+    if Topic === @search_context && @search_context.posts_count < SiteSetting.min_posts_for_search_in_topic
+      @search_context = nil
+    end
   end
 
   # Query a term

spec/components/search_spec.rb

@@ -133,6 +133,9 @@ describe Search do
       end
 
       it 'displays multiple results within a topic' do
+
+        SiteSetting.stubs(:min_posts_for_search_in_topic).returns(3)
+
         topic = Fabricate(:topic)
         topic2 = Fabricate(:topic)
 
@@ -144,6 +147,9 @@ describe Search do
         post4 = new_post('this is my fourth post I am posting', topic)
         new_post('this is my fifth post I am posting', topic2)
 
+        # update posts_count
+        topic.reload
+
         results = Search.new('posting', search_context: post1.topic).execute.find do |r|
           r[:type] == "topic"
         end[:results]
@@ -160,6 +166,11 @@ describe Search do
         # trigger expanded search
         results = Search.new('birds', search_context: post1.topic).execute
 
+        SiteSetting.stubs(:min_posts_for_search_in_topic).returns(10)
+        results = Search.new('posting', search_context: post1.topic).execute.find do |r|
+          r[:type] == "topic"
+        end[:results].length.should == 2
+
       end
     end