Implement Blue Star award with OOP refactor

award.rb

@@ -1 +1,77 @@
-Award = Struct.new(:name, :expires_in, :quality)
+class Award
+  attr_accessor :name, :expires_in, :quality
+
+  # Award type constants
+  BLUE_FIRST = 'Blue First'
+  BLUE_COMPARE = 'Blue Compare'
+  BLUE_DISTINCTION_PLUS = 'Blue Distinction Plus'
+  BLUE_STAR = 'Blue Star'
+
+  # Quality constraints
+  MIN_QUALITY = 0
+  MAX_QUALITY = 50
+
+  def initialize(name, expires_in, quality)
+    @name = name
+    @expires_in = expires_in
+    @quality = quality
+  end
+
+  def update_quality
+    return if @name == BLUE_DISTINCTION_PLUS
+
+    adjust_quality
+
+    @expires_in -= 1
+
+    adjust_quality_for_expiration if @expires_in < 0
+  end
+
+  private
+
+  def adjust_quality
+    case @name
+    when BLUE_FIRST
+      increase_quality(1)
+
+    when BLUE_COMPARE
+      increase_quality(quality_increase_for_blue_compare)
+
+    when BLUE_STAR
+      decrease_quality(2)
+
+    else
+      decrease_quality(1)
+    end
+  end
+
+  def adjust_quality_for_expiration
+    case @name
+    when BLUE_FIRST
+      increase_quality(1)  # Gets better with age, even after expiration
+
+    when BLUE_COMPARE
+      @quality = 0  # Drops to zero immediately after expiration
+
+    when BLUE_STAR
+      decrease_quality(2)  # Degrades twice as fast = 4 total per day
+
+    else
+      decrease_quality(1)  # Normal awards degrade twice as fast = 2 total per day
+    end
+  end
+
+  def quality_increase_for_blue_compare
+    return 3 if @expires_in <= 5
+    return 2 if @expires_in <= 10
+    1
+  end
+
+  def increase_quality(amount)
+    @quality = [@quality + amount, MAX_QUALITY].min
+  end
+
+  def decrease_quality(amount)
+    @quality = [@quality - amount, MIN_QUALITY].max
+  end
+end

update_quality.rb

@@ -2,48 +2,6 @@
 
 def update_quality(awards)
   awards.each do |award|
-    if award.name != 'Blue First' && award.name != 'Blue Compare'
-      if award.quality > 0
-        if award.name != 'Blue Distinction Plus'
-          award.quality -= 1
-        end
-      end
-    else
-      if award.quality < 50
-        award.quality += 1
-        if award.name == 'Blue Compare'
-          if award.expires_in < 11
-            if award.quality < 50
-              award.quality += 1
-            end
-          end
-          if award.expires_in < 6
-            if award.quality < 50
-              award.quality += 1
-            end
-          end
-        end
-      end
-    end
-    if award.name != 'Blue Distinction Plus'
-      award.expires_in -= 1
-    end
-    if award.expires_in < 0
-      if award.name != 'Blue First'
-        if award.name != 'Blue Compare'
-          if award.quality > 0
-            if award.name != 'Blue Distinction Plus'
-              award.quality -= 1
-            end
-          end
-        else
-          award.quality = award.quality - award.quality
-        end
-      else
-        if award.quality < 50
-          award.quality += 1
-        end
-      end
-    end
+    award.update_quality
   end
 end

update_quality_spec.rb

@@ -177,7 +177,6 @@
       end
 
       context 'given a Blue Star award' do
-        before { pending }
         let(:name) { 'Blue Star' }
         before { award.expires_in.should == initial_expires_in-1 }