Applied requested changes and eliminated the 'Item' class

ruby/gilded_rose.rb

@@ -5,64 +5,77 @@ class GildedRose
   end
 
   def update_quality()
+    # Loop through each item in the list
     @items.each do |item|
-      if item.name != "Aged Brie" and item.name != "Backstage passes to a TAFKAL80ETC concert"
+      # Check the name of the item to determine the update rules
-        if item.quality > 0
+      case item.name
-          if item.name != "Sulfuras, Hand of Ragnaros"
+      when "Aged Brie"
-            item.quality = item.quality - 1
+        increase_quality(item) # Increase quality of Aged Brie
-          end
+      when "Backstage passes to a TAFKAL80ETC concert"
-        end
+        handle_backstage_pass(item) # Handle Backstage Passes quality
+      when "Sulfuras, Hand of Ragnaros"
+        # Sulfuras does not change in quality or sell_in, so skip to the next item
+        next
+      when "Conjured"
+        degrade_quality(item, 2) # Degrade quality twice as fast for Conjured items
       else
-        if item.quality < 50
+        degrade_quality(item) # Normal degradation for other items
-          item.quality = item.quality + 1
-          if item.name == "Backstage passes to a TAFKAL80ETC concert"
-            if item.sell_in < 11
-              if item.quality < 50
-                item.quality = item.quality + 1
-              end
-            end
-            if item.sell_in < 6
-              if item.quality < 50
-                item.quality = item.quality + 1
-              end
-            end
-          end
-        end
-      end
-      if item.name != "Sulfuras, Hand of Ragnaros"
-        item.sell_in = item.sell_in - 1
       end
+
+      decrease_sell_in(item) # Decrease the sell_in for all items
+
+      # Check if the item has expired
       if item.sell_in < 0
-        if item.name != "Aged Brie"
+        handle_expired_item(item) # Handle item quality after expiration
-          if item.name != "Backstage passes to a TAFKAL80ETC concert"
-            if item.quality > 0
-              if item.name != "Sulfuras, Hand of Ragnaros"
-                item.quality = item.quality - 1
-              end
-            end
-          else
-            item.quality = item.quality - item.quality
-          end
-        else
-          if item.quality < 50
-            item.quality = item.quality + 1
-          end
-        end
       end
     end
   end
-end
 
-class Item
+  private
-  attr_accessor :name, :sell_in, :quality
 
-  def initialize(name, sell_in, quality)
+  def increase_quality(item, rate = 1)
-    @name = name
+    # Increase the quality of an item if it's less than 50 (maximum quality)
-    @sell_in = sell_in
+    item.quality += rate if item.quality < 50
-    @quality = quality
   end
 
-  def to_s()
+  def handle_backstage_pass(item)
-    "#{@name}, #{@sell_in}, #{@quality}"
+    # Increase quality based on sell_in period for Backstage Passes
+    if item.sell_in > 10
+      increase_quality(item) # More than 10 days left: quality increases by 1
+    elsif item.sell_in > 5
+      increase_quality(item, 2) # 6-10 days left: quality increases by 2
+    elsif item.sell_in >= 0
+      increase_quality(item, 3) # 1-5 days left: quality increases by 3
+    else
+      item.quality = 0 # Quality drops to 0 after the concert
+    end
+  end
+
+  def degrade_quality(item, rate = 1)
+    # Decrease the quality of the item, accounting for Conjured items that degrade twice as fast
+    if item.name == "Conjured"
+      item.quality -= rate * 2 if item.quality > 0
+    else
+      item.quality -= rate if item.quality > 0
+    end
+  end
+
+  def decrease_sell_in(item)
+    # Decrease the sell_in value for all items except Sulfuras
+    item.sell_in -= 1 unless item.name == "Sulfuras, Hand of Ragnaros"
+  end
+
+  def handle_expired_item(item)
+    # Handle item quality after expiration based on item name
+    case item.name
+    when "Aged Brie"
+      increase_quality(item) # Quality increases after expiration for Aged Brie
+    when "Backstage passes to a TAFKAL80ETC concert"
+      item.quality = 0 # Quality drops to 0 after the concert
+    when "Conjured"
+      degrade_quality(item, 4) # Conjured items degrade twice as fast after expiration
+    else
+      degrade_quality(item, 2) # Normal quality degradation after expiration for other items
+    end
   end
 end