Add unit price and unit parsing for items

This update enhances the `Item` structure to include `UnitPrice` and `Unit` fields. Additional logic is implemented to extract and parse unit pricing details from the HTML, improving data accuracy and granularity.

sites/wegmans/wegmans.go

@@ -22,9 +22,11 @@ var ErrNilURL = errors.New("url is nil")
 var ErrInvalidURL = errors.New("invalid url")
 
 type Item struct {
-	ID    int
-	Name  string
-	Price float64
+	ID        int
+	Name      string
+	Price     float64
+	UnitPrice float64
+	Unit      string
 }
 
 func deferClose(c io.Closer) {
@@ -93,5 +95,23 @@ func (c Config) GetItemPrice(ctx context.Context, b extractor.Browser, u *url.UR
 		res.Price = price
 	}
 
+	unitPrices := doc.Select(`span[data-test="per-unit-price"]`)
+
+	if len(unitPrices) != 0 {
+		unitPriceStr, _ := unitPrices[0].Text()
+		unitPriceStr = strings.TrimSpace(unitPriceStr)
+		unitPriceStr = strings.ReplaceAll(unitPriceStr, "(", "")
+		unitPriceStr = strings.ReplaceAll(unitPriceStr, ")", "")
+		unitPriceStr = strings.ReplaceAll(unitPriceStr, "$", "")
+		unitPriceStr = strings.ReplaceAll(unitPriceStr, ",", "")
+
+		units := strings.Split(unitPriceStr, "/")
+
+		if len(units) > 1 {
+			res.Unit = strings.TrimSpace(units[1])
+			res.UnitPrice, _ = strconv.ParseFloat(units[0], 64)
+		}
+	}
+
 	return res, nil
 }