🔨 move quality logic to ItemHandler

Java/src/main/java/com/gildedrose/item_helpers/ItemHandler.java

@@ -0,0 +1,75 @@
+package com.gildedrose.item_helpers;
+
+import com.gildedrose.Item;
+
+import static java.lang.Math.max;
+
+public class ItemHandler {
+
+    private static final int QUALITY = 80;
+
+    private final Item item;
+
+    public ItemHandler(Item item) {
+        this.item = item;
+    }
+
+    public void decrementSellInDate() {
+        this.item.sellIn--;
+    }
+
+    public boolean qualityIsHigherThanZero() {
+        return item.quality > 0;
+    }
+
+    public boolean sellInDatePasses() {
+        return this.item.sellIn < 0;
+    }
+
+    public void incrementQualityByTwo() {
+        this.item.quality = max(this.item.quality + 2, 0);
+    }
+
+    public void incrementQuality() {
+        this.item.quality++;
+    }
+
+    public void decrementQuality() {
+        this.item.quality--;
+    }
+
+    public void decrementQualityBy4() {
+        this.item.quality = max(this.item.quality - 4, 0);
+    }
+
+    public void decrementQualityBy2() {
+        this.item.quality = this.item.quality - 2;
+    }
+
+    public void setQualityTo80() {
+        if (this.item.quality != QUALITY) {
+            this.item.quality = QUALITY;
+        }
+    }
+
+    public boolean sellInLessThan5Days() {
+        return this.item.sellIn >= 0 && this.item.sellIn <= 5;
+    }
+
+    public boolean sellInLessThan10Days() {
+        return this.item.sellIn >= 5 && this.item.sellIn <= 10;
+    }
+
+    public boolean sellInDaysMoreThan10Days() {
+        return this.item.sellIn >= 10;
+    }
+
+    public void makeQualityZero() {
+        this.item.quality = 0;
+    }
+
+    public void incrementQualityBy3() {
+        this.item.quality = this.item.quality + 3;
+    }
+
+}

Java/src/main/java/com/gildedrose/items/AgedBrie.java

@@ -1,48 +1,27 @@
 package com.gildedrose.items;
 
 import com.gildedrose.Item;
+import com.gildedrose.item_helpers.ItemHandler;
 import com.gildedrose.item_helpers.ItemType;
 
-import static java.lang.Math.max;
-
 public class AgedBrie implements ItemType {
 
-    private final Item item;
+    private final ItemHandler item;
 
     public AgedBrie(Item item) {
-        this.item = item;
+        this.item = new ItemHandler(item);
     }
 
     @Override
     public void updateQuality() {
-        decrementSellInDate();
-        if (qualityIsPositive()) {
-            if (sellInDatePasses()) {
-                incrementQualityByTwo();
+        item.decrementSellInDate();
+        if (item.qualityIsHigherThanZero()) {
+            if (item.sellInDatePasses()) {
+                item.incrementQualityByTwo();
             } else {
-                incrementQuality();
+                item.incrementQuality();
             }
         }
     }
 
-    private boolean qualityIsPositive() {
-        return item.quality > 0;
-    }
-
-    private void decrementSellInDate() {
-        this.item.sellIn--;
-    }
-
-    private boolean sellInDatePasses() {
-        return this.item.sellIn < 0;
-    }
-
-    private void incrementQualityByTwo() {
-        this.item.quality = max(this.item.quality + 2, 0);
-    }
-
-    private void incrementQuality() {
-        this.item.quality++;
-    }
-
 }

Java/src/main/java/com/gildedrose/items/BackstagePass.java

@@ -1,52 +1,29 @@
 package com.gildedrose.items;
 
 import com.gildedrose.Item;
+import com.gildedrose.item_helpers.ItemHandler;
 import com.gildedrose.item_helpers.ItemType;
 
 public class BackstagePass implements ItemType {
 
-    private final Item item;
+    private final ItemHandler item;
 
     public BackstagePass(Item item) {
-        this.item = item;
+        this.item = new ItemHandler(item);
     }
 
     @Override
     public void updateQuality() {
-        decrementSellInDate();
-        determineQuality();
-    }
-
-    private void determineQuality() {
-        if (this.item.sellIn >= 10) {
-            incrementQuality();
-        } else if (this.item.sellIn >= 5) {
-            incrementQualityByTwo();
-        } else if (this.item.sellIn >= 0) {
-            incrementQualityByThree();
+        item.decrementSellInDate();
+        if (item.sellInDaysMoreThan10Days()) {
+            item.incrementQuality();
+        } else if (item.sellInLessThan10Days()) {
+            item.incrementQualityByTwo();
+        } else if (item.sellInLessThan5Days()) {
+            item.incrementQualityBy3();
         } else {
-            makeQualityZero();
+            item.makeQualityZero();
         }
     }
 
-    private void decrementSellInDate() {
-        this.item.sellIn--;
-    }
-
-    private void incrementQuality() {
-        this.item.quality++;
-    }
-
-    private void makeQualityZero() {
-        this.item.quality = 0;
-    }
-
-    private void incrementQualityByTwo() {
-        this.item.quality = this.item.quality + 2;
-    }
-
-    private void incrementQualityByThree() {
-        this.item.quality = this.item.quality + 3;
-    }
-
 }

Java/src/main/java/com/gildedrose/items/Conjured.java

@@ -1,47 +1,27 @@
 package com.gildedrose.items;
 
 import com.gildedrose.Item;
+import com.gildedrose.item_helpers.ItemHandler;
 import com.gildedrose.item_helpers.ItemType;
 
-import static java.lang.Math.max;
-
 public class Conjured implements ItemType {
 
-    private final Item item;
+    private final ItemHandler item;
 
     public Conjured(Item item) {
-        this.item = item;
+        this.item = new ItemHandler(item);
     }
 
     @Override
     public void updateQuality() {
-        decrementSellInDate();
-        if (qualityIsGreaterThanZero()) {
-            if (sellInDatePasses()) {
-                decrementQualityByFour();
+        item.decrementSellInDate();
+        if (item.qualityIsHigherThanZero()) {
+            if (item.sellInDatePasses()) {
+                item.decrementQualityBy4();
             } else {
-                decrementQuality();
+                item.decrementQuality();
             }
         }
     }
 
-    private boolean qualityIsGreaterThanZero() {
-        return item.quality > 0;
-    }
-
-    private void decrementSellInDate() {
-        this.item.sellIn--;
-    }
-
-    private void decrementQualityByFour() {
-        this.item.quality = max(this.item.quality - 4, 0);
-    }
-
-    private boolean sellInDatePasses() {
-        return this.item.sellIn < 0;
-    }
-
-    private void decrementQuality() {
-        this.item.quality--;
-    }
 }

Java/src/main/java/com/gildedrose/items/Normal.java

@@ -1,47 +1,27 @@
 package com.gildedrose.items;
 
 import com.gildedrose.Item;
+import com.gildedrose.item_helpers.ItemHandler;
 import com.gildedrose.item_helpers.ItemType;
 
-import static java.lang.Math.max;
-
 public class Normal implements ItemType {
 
-    private final Item item;
+    private final ItemHandler item;
 
     public Normal(Item item) {
-        this.item = item;
+        this.item = new ItemHandler(item);
     }
 
     @Override
     public void updateQuality() {
-        decrementSellInDate();
-        if (qualityIsPositive()) {
-            if (sellInDatePasses()) {
-                decrementQualityByTwo();
+        item.decrementSellInDate();
+        if (item.qualityIsHigherThanZero()) {
+            if (item.sellInDatePasses()) {
+                item.decrementQualityBy2();
             } else {
-                decrementQuality();
+                item.decrementQuality();
             }
         }
     }
 
-    private boolean qualityIsPositive() {
-        return item.quality > 0;
-    }
-
-    private void decrementSellInDate() {
-        this.item.sellIn--;
-    }
-
-    private void decrementQualityByTwo() {
-        this.item.quality = max(this.item.quality - 2, 0);
-    }
-
-    private boolean sellInDatePasses() {
-        return this.item.sellIn < 0;
-    }
-
-    private void decrementQuality() {
-        this.item.quality--;
-    }
 }

Java/src/main/java/com/gildedrose/items/Sulfura.java

@@ -1,30 +1,21 @@
 package com.gildedrose.items;
 
 import com.gildedrose.Item;
+import com.gildedrose.item_helpers.ItemHandler;
 import com.gildedrose.item_helpers.ItemType;
 
 public class Sulfura implements ItemType {
 
-    private static final int QUALITY = 80;
-    private final Item item;
+    private final ItemHandler item;
 
     public Sulfura(Item item) {
-        this.item = item;
+        this.item = new ItemHandler(item);
     }
 
     @Override
     public void updateQuality() {
-        decrementSellInDate();
-        setQualityTo80();
+        item.decrementSellInDate();
+        item.setQualityTo80();
     }
 
-    private void setQualityTo80() {
-        if (this.item.quality != QUALITY) {
-            this.item.quality = QUALITY;
-        }
-    }
-
-    private void decrementSellInDate() {
-        this.item.sellIn--;
-    }
 }