completed the code

js-jest/src/gilded_rose.js

@@ -6,9 +6,10 @@ class Item {
   }
 }
 
+//This class will hold the rules for the items. making it easier to accomodate future additions to the shop
 class Rules {
   constructor(dailyQualityChangeValue, maxQuality, minQuality, tenDayChange, fiveDayChange,
-    isZeroDayQualityDrop, zeroDayQualityValue) {
+    isZeroDayQualityDrop, zeroDayQualityValue, isSellInValueChangeAllowed, isConcert) {
     this.dailyQualityChangeValue = dailyQualityChangeValue;
     this.maxQuality = maxQuality;
     this.minQuality = minQuality;
@@ -16,6 +17,8 @@ class Rules {
     this.fiveDayChange = fiveDayChange;
     this.isZeroDayQualityDrop = isZeroDayQualityDrop;
     this.zeroDayQualityValue = zeroDayQualityValue;
+    this.isSellInValueChangeAllowed = isSellInValueChangeAllowed;
+    this.isConcert = isConcert;
   }
 }
 
@@ -25,11 +28,90 @@ class Shop {
   }
 
 
-  updateQuality() {
+  updateQualityNew() {
     const rules = {
-      'Aged Brie': new Rules(1, 50, 0, 1, 1),
-      'Backstage passes to a TAFKAL80ETC concert': new Rules(1, 50, 0)
+      'Aged Brie': new Rules(1, 50, 0, 1, 1, false, 0, true, false),
+      'Backstage passes to a TAFKAL80ETC concert': new Rules(1, 50, 0, 2, 3, true, 0, true, true),
+      'Sulfuras, Hand of Ragnaros': new Rules(0, Infinity, 0, 0, 0, false, 0, false, false),
+      'Conjured Mana Cake': new Rules(-2, 50, 0, -2, -2, false, 0, true, false),
+      'DEFAULT': new Rules(-1, 50, 0, -1, -1, false, 0, true, false)
     }
+    //1. Iterate over the item list
+    for (let i = 0; i < this.items.length; i++) {
+      let itemName = this.items[i].name;
+      //2. Check rules object and fetch corresponding rules. If the item name is not found in rules use 'DEFAULT' rule
+      let itemRule;
+      if (rules[itemName]) {
+        itemRule = rules[itemName];
+      } else {
+        itemRule = rules['DEFAULT'];
+      }
+      // console.log("Rules for item " + itemName + " is " + JSON.stringify(itemRule));
+      this.applyRule(this.items[i], itemRule);
+    }
+
+    return this.items;
+  }
+
+  applyRule(itemObj, ruleObj) {
+    //Decrease the sellin value 
+    if (itemObj.sellIn <= 0 && !ruleObj.isZeroDayQualityDrop) {
+      //if sell in day is less than 0 then add the quality by 2 times dailyChangeValue 
+      //Not applicable for concert tickets
+      if (!itemObj.isConcert) {
+        itemObj.quality = itemObj.quality + 2 * ruleObj.dailyQualityChangeValue;
+      }
+    } else if (itemObj.sellIn <= 0 && ruleObj.isZeroDayQualityDrop) {
+      /*
+      if sell in day is 0 and quality drop is required on 0 day
+      then assign zero day value to quality
+      */
+      itemObj.quality = ruleObj.zeroDayQualityValue;
+
+      //Decrement sell in and return
+      if (ruleObj.isSellInValueChangeAllowed) {
+        itemObj.sellIn = itemObj.sellIn - 1;
+      }
+      return;
+
+    } else if (itemObj.sellIn <= 5) {
+      /*
+      if sell in day is 5 or less then add fiveDayChange value to quality
+      */
+      itemObj.quality = itemObj.quality + ruleObj.fiveDayChange;
+    } else if (itemObj.sellIn <= 10) {
+      /*
+      if sell in day is 10 or less then add tenDayChange value to quality
+      */
+      itemObj.quality = itemObj.quality + ruleObj.tenDayChange;
+    } else {
+      /*
+      for any other sellIn day add dailyQualityChangeValue to quality
+      */
+      itemObj.quality = itemObj.quality + ruleObj.dailyQualityChangeValue;
+    }
+
+    //Check Quality value min and max limits and adjust
+    this.applyQualityMaxMinCheck(itemObj, ruleObj.minQuality, ruleObj.maxQuality)
+
+    //decrease sell in value by 1
+    if (ruleObj.isSellInValueChangeAllowed) {
+      itemObj.sellIn = itemObj.sellIn - 1;
+    }
+
+
+  }
+
+  applyQualityMaxMinCheck(itemObj, minVal, maxVal) {
+    //Check and update items quality based on max and min values allowed
+    if (itemObj.quality < minVal) {
+      itemObj.quality = minVal;
+    } else if (itemObj.quality > maxVal) {
+      itemObj.quality = maxVal;
+    }
+  }
+
+  updateQuality() {
     for (let i = 0; i < this.items.length; i++) {
       if (this.items[i].name != 'Aged Brie' && this.items[i].name != 'Backstage passes to a TAFKAL80ETC concert') {
         if (this.items[i].quality > 0) {
@@ -78,6 +160,8 @@ class Shop {
 
     return this.items;
   }
+
+
 }
 
 module.exports = {

js-jest/test/texttest_fixture.js

@@ -23,5 +23,5 @@ for (let day = 0; day < days; day++) {
   console.log(`\n-------- day ${day} --------`);
   console.log("name, sellIn, quality");
   items.forEach(item => console.log(`${item.name}, ${item.sellIn}, ${item.quality}`));
-  gildedRose.updateQuality();
+  gildedRose.updateQualityNew();
 }