Separate query from cloud

This will make testing easier

app/models/stats/tag_cloud.rb

@@ -3,11 +3,10 @@
 module Stats
   class TagCloud
 
-    attr_reader :user, :cutoff, :levels
-    def initialize(user, cutoff = nil)
-      @user = user
-      @cutoff = cutoff
+    attr_reader :levels, :tags
+    def initialize(tags)
       @levels = 10
+      @tags = tags.sort_by { |tag| tag.name.downcase }
     end
 
     def empty?
@@ -18,10 +17,6 @@ module Stats
       (9 + 2*(tag.count.to_i-min)/divisor)
     end
 
-    def tags
-      @tags ||= top_tags
-    end
-
     private
 
     def max
@@ -39,33 +34,5 @@ module Stats
     def counts
       @counts ||= tags.map {|t| t.count.to_i}
     end
-
-    def top_tags
-      Tag.find_by_sql(query_options).sort_by { |tag| tag.name.downcase }
-    end
-
-    def query_options
-      options = [sql, user.id]
-      options += [cutoff, cutoff] if cutoff
-      options
-    end
-
-    def sql
-      # TODO: parameterize limit
-      query = "SELECT tags.id, tags.name AS name, count(*) AS count"
-      query << " FROM taggings, tags, todos"
-      query << " WHERE tags.id = tag_id"
-      query << " AND todos.user_id=? "
-      query << " AND taggings.taggable_type='Todo' "
-      query << " AND taggings.taggable_id=todos.id "
-      if cutoff
-        query << " AND (todos.created_at > ? OR "
-        query << "      todos.completed_at > ?) "
-      end
-      query << " GROUP BY tags.id, tags.name"
-      query << " ORDER BY count DESC, name"
-      query << " LIMIT 100"
-    end
-
   end
 end

app/models/stats/tag_cloud_query.rb

@@ -0,0 +1,38 @@
+module Stats
+  class TagCloudQuery
+
+    attr_reader :user, :cutoff
+    def initialize(user, cutoff = nil)
+      @user = user
+      @cutoff = cutoff
+    end
+
+    def result
+      Tag.find_by_sql(query_options)
+    end
+
+    def query_options
+      options = [sql, user.id]
+      options += [cutoff, cutoff] if cutoff
+      options
+    end
+
+    def sql
+      # TODO: parameterize limit
+      query = "SELECT tags.id, tags.name AS name, count(*) AS count"
+      query << " FROM taggings, tags, todos"
+      query << " WHERE tags.id = tag_id"
+      query << " AND todos.user_id=? "
+      query << " AND taggings.taggable_type='Todo' "
+      query << " AND taggings.taggable_id=todos.id "
+      if cutoff
+        query << " AND (todos.created_at > ? OR "
+        query << "      todos.completed_at > ?) "
+      end
+      query << " GROUP BY tags.id, tags.name"
+      query << " ORDER BY count DESC, name"
+      query << " LIMIT 100"
+    end
+
+  end
+end