Refactor Update Reward to OOO

award.rb

@@ -1 +1,13 @@
-Award = Struct.new(:name, :expires_in, :quality)
+Award = Struct.new(:name, :expires_in, :quality) do |new_class|
+  def increase_quality(quality)
+    self.quality += quality
+  end
+
+  def decrease_quality(quality)
+    self.quality -= quality
+  end
+
+  def decrease_expiration(day)
+    self.expires_in -= day
+  end
+end

reward_modifier.rb

@@ -0,0 +1,56 @@
+require 'award'
+
+class RewardModifier
+  attr_accessor :awards
+  WHITE_LIST = ['Blue First', 'Blue Compare', 'Blue Distinction Plus']
+
+  def initialize(awards)
+    @awards = awards
+  end
+
+  def update_quality
+    awards.each do |award|
+      calculate_quality(award)
+      modify_expiration_date(award)
+      calculate_expired_quality(award) if expiration_passed?(award)
+    end
+  end
+
+  def modify_expiration_date(award)
+    award.decrease_expiration(1) if award.name != 'Blue Distinction Plus'
+  end
+
+  def calculate_quality(award)
+    case award.name
+    when *WHITE_LIST
+      award.increase_quality(1) if award.quality < 50
+      if award.name == 'Blue Compare'
+        award.increase_quality(1) if award.expires_in < 11 && award.quality < 50
+        award.increase_quality(1) if award.expires_in < 6 && award.quality < 50
+      end
+    else
+      if !award.quality.zero? && award.name != 'Blue Star'
+        award.decrease_quality(1)
+      elsif !award.quality.zero? && award.name == 'Blue Star'
+        award.decrease_quality(2)
+      end
+    end
+  end
+
+  def expiration_passed?(award)
+    award.expires_in < 0
+  end
+
+  def calculate_expired_quality(award)
+    unless award.name == 'Blue First'
+      if award.name != 'Blue Compare'
+        award.decrease_quality(1) if award.name != 'Blue Distinction Plus' && award.quality > 0 && award.name != 'Blue Star'
+        award.decrease_quality(2) if award.name == 'Blue Star' && award.quality > 0
+      else
+        award.quality = 0
+      end
+    end
+
+    award.increase_quality(1) if award.name == 'Blue First' && award.quality < 50
+  end
+end