Create new transaction log table to track user conversions

app/models/transaction_log_item.rb

@@ -0,0 +1,27 @@
+class TransactionLogItem < ActiveRecord::Base
+  attr_accessible :category, :data, :user_id
+  validates_inclusion_of :category, :in => %w(
+    account_upgrade_basic_to_gold 
+    account_upgrade_basic_to_platinum 
+    account_upgrade_gold_to_platinum
+    account_upgrade_view
+  )
+
+  def self.record_account_upgrade_view(user, referrer)
+    create(:category => "account_upgrade_view", :user_id => user.id, :data => referrer)
+  end
+
+  def self.record_account_upgrade(user)
+    attributes = {:user_id => user.id}
+
+    if user.level_was < User::Levels::PLATINUM && user.level == User::Levels::PLATINUM
+      attributes[:category] = "account_upgrade_gold_to_platinum"
+    elsif user.level_was < User::Levels::GOLD && user.level == User::Levels::GOLD
+      attributes[:category] = "account_upgrade_basic_to_gold"
+    elsif user.level_was < User::Levels::GOLD && user.level == User::Levels::PLATINUM
+      attributes[:category] = "account_upgrade_basic_to_platinum"
+    end
+
+    create(attributes)
+  end
+end