From ee5ac0227e486f8c4b01fc5a16d52cb0197a5496 Mon Sep 17 00:00:00 2001
From: "Matthew K. Fu JuYuan" <matthewfu@gmail.com>
Date: Wed, 1 Aug 2012 18:15:10 +0800
Subject: [PATCH] change the algorithm of tag cloud.

---
 app/models/tag.rb | 28 +++++++++++++---------------
 1 file changed, 13 insertions(+), 15 deletions(-)

diff --git a/app/models/tag.rb b/app/models/tag.rb
index c9c32496..fbf57615 100644
--- a/app/models/tag.rb
+++ b/app/models/tag.rb
@@ -11,38 +11,36 @@ class Tag
   belongs_to :module_app
   
   def cloud_amper
-    for_now = {:start_at=>20.days.ago,:end_at=>Time.now}
-    for_yesterday = {:start_at=>19.days.ago,:end_at=>1.days.ago}
+    for_now = {:start_at=>14.days.ago,:end_at=>Time.now}
+    for_yesterday = {:start_at=>15.days.ago,:end_at=>1.days.ago}
 
 
     range = self.class.all.collect{ |tag|
-      get_impressionist_diff(tag)
+      get_impressionist(tag)
     }
     range.sort!.reverse!.uniq!
     offset_size = range.size+4
-    section_3 =  range.last..range[-(offset_size/4)]
-    section_2 =  range[-(offset_size/4)-1]..range[-2*(offset_size/4)] rescue nil
-    section_1 =  range[-2*(offset_size/4)-1]..range[1]  rescue nil
+    section_3 =  range.first..range[(offset_size/4)]
+    section_2 =  range[(offset_size/4)+1]..range[2*(offset_size/4)] rescue nil
+    section_1 =  range[2*(offset_size/4)+1]..last  rescue nil
 
 
-    case get_impressionist_diff
+    case get_impressionist
     when range.first
-      return :heading1
+      return :hot1
     when section_1
-      return :heading2
+      return :hot2
     when section_2
-      return :heading3
+      return :hot3
     when section_3
-      return :heading4
+      return :hot4
     end
     
   end
 
 protected
-  def get_impressionist_diff(item_tag = self)
-      for_now = item_tag.impressions.where(:created_at.gte=> 20.days.ago,:created_at.lte => Time.now).count
-      for_yesterday = item_tag.impressions.where(:created_at.gte=> 21.days.ago,:created_at.lte => 1.days.ago).count
-      for_now - for_yesterday
+  def get_impressionist(item_tag = self)
+    item_tag.impressions.where(:created_at.gte=> 14.days.ago,:created_at.lte => Time.now).count
   end
 
 end