text: class Item {
    constructor(name, sellIn, quality) {
      this.name = name;
      this.sellIn = sellIn;
      this.quality = quality;
    }
  }
  
  class Shop {
    constructor(items = []) {
      this.items = items;
    }
    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) {
            if (this.items[i].name != "Sulfuras, Hand of Ragnaros") {
              this.items[i].quality = this.items[i].quality - 1;
            }
          }
        } else {
          if (this.items[i].quality < 50) {
            this.items[i].quality = this.items[i].quality + 1;
            if (
              this.items[i].name == "Backstage passes to a TAFKAL80ETC concert"
            ) {
              if (this.items[i].sellIn < 11) {
                if (this.items[i].quality < 50) {
                  this.items[i].quality = this.items[i].quality + 1;
                }
              }
              if (this.items[i].sellIn < 6) {
                if (this.items[i].quality < 50) {
                  this.items[i].quality = this.items[i].quality + 1;
                }
              }
            }
          }
        }
        if (this.items[i].name != "Sulfuras, Hand of Ragnaros") {
          this.items[i].sellIn = this.items[i].sellIn - 1;
        }
        if (this.items[i].sellIn < 0) {
          if (this.items[i].name != "Aged Brie") {
            if (
              this.items[i].name != "Backstage passes to a TAFKAL80ETC concert"
            ) {
              if (this.items[i].quality > 0) {
                if (this.items[i].name != "Sulfuras, Hand of Ragnaros") {
                  this.items[i].quality = this.items[i].quality - 1;
                }
              }
            } else {
              this.items[i].quality =
                this.items[i].quality - this.items[i].quality;
            }
          } else {
            if (this.items[i].quality < 50) {
              this.items[i].quality = this.items[i].quality + 1;
            }
          }
        }
      }
  
      return this.items;
    }
  }
  
  export { Item, Shop };
  