Update Blue Star award decay rate

Gemfile

@@ -1,3 +1,6 @@
 source 'https://rubygems.org'
 gem 'rspec'
 gem 'rake'
+group :development do
+    gem 'byebug'
+end

Gemfile.lock

@@ -1,6 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    byebug (11.1.3)
     diff-lcs (1.2.5)
     rake (13.0.6)
     rspec (2.14.1)
@@ -16,6 +17,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  byebug
   rake
   rspec
 

award.rb

@@ -1 +1,83 @@
-Award = Struct.new(:name, :expires_in, :quality)
+QUALITY_LOWER_LIMIT = 0
+QUALITY_UPPER_LIMIT = 50
+BLUE_COMPARE_DEADLINE_1 = 5
+BLUE_COMPARE_DEADLINE_1_QUALITY_THRESHOLD = 3
+BLUE_COMPARE_DEADLINE_2 = 10
+BLUE_COMPARE_DEADLINE_2_QUALITY_THRESHOLD = 2
+BLUE_STAR_DECAY_RATE_EXPIRED = 4
+BLUE_STAR_DECAY_RATE_DEFAULT = 2
+BLUE_DINSTINCTION_PLUS_QUALITY = 80
+RATE_DEFAULT = 1
+RATE_DOUBLE = 2
+
+class Award
+  attr_accessor :name, :expires_in, :quality
+
+  def initialize(name, expires_in, quality)
+    @name = name
+    @expires_in = expires_in
+    @quality = quality
+  end
+
+  def update_quality
+    case self.name
+    when 'Blue First'
+      update_blue_first_award
+    when 'Blue Compare'
+      update_blue_compare_award
+    when 'Blue Star'
+      update_blue_star_award
+    when 'Blue Distinction Plus'
+      update_blue_distinction_plus
+    else
+      update_normal_award
+    end
+
+    unless self.name == 'Blue Distinction Plus'
+      maintain_quality_limits
+      decrease_expiration
+    end
+  end
+
+  private
+
+  def maintain_quality_limits
+    self.quality = quality.clamp(QUALITY_LOWER_LIMIT, QUALITY_UPPER_LIMIT)
+  end
+
+  def expired?
+    self.expires_in <= 0
+  end
+
+  def update_normal_award
+    self.quality -= expired? ? RATE_DOUBLE : RATE_DEFAULT
+  end
+
+  def update_blue_first_award
+    self.quality += expired? ? RATE_DOUBLE : RATE_DEFAULT
+  end
+
+  def update_blue_compare_award
+    if expired?
+      self.quality = 0
+    elsif self.expires_in <= BLUE_COMPARE_DEADLINE_1
+      self.quality += BLUE_COMPARE_DEADLINE_1_QUALITY_THRESHOLD
+    elsif self.expires_in <= BLUE_COMPARE_DEADLINE_2
+      self.quality += BLUE_COMPARE_DEADLINE_2_QUALITY_THRESHOLD
+    else
+      self.quality += RATE_DEFAULT
+    end
+  end
+
+  def update_blue_star_award
+    self.quality -= expired? ? BLUE_STAR_DECAY_RATE_EXPIRED : BLUE_STAR_DECAY_RATE_DEFAULT
+  end
+
+  def decrease_expiration
+    self.expires_in -= RATE_DEFAULT
+  end
+
+  def update_blue_distinction_plus
+    self.quality = BLUE_DINSTINCTION_PLUS_QUALITY
+  end
+end

update_quality.rb

@@ -1,49 +1,5 @@
 require 'award'
 
 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
-  end
+  awards.each(&:update_quality)
 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 }