new get price method

internal/parsers/mandarake/service.go

@@ -41,6 +41,48 @@ func (s *Parser) getPrice(ctx context.Context, task shared.Task) (int32, error)
 	return minimal, nil
 }
 
+func (s *Parser) getMinimalPrice(task shared.Task) (int32, error) {
+	ctx := context.Background()
+	allocCtx, allocCancel := chromedp.NewRemoteAllocator(ctx, s.externalBrowser)
+	defer allocCancel()
+
+	sessionCtx, sessionCancel := chromedp.NewContext(allocCtx, chromedp.WithLogf(log.Printf))
+	defer sessionCancel()
+
+	var (
+		singlePrice string
+		rangedPrice string
+		prices      []int32
+	)
+
+	if err := chromedp.Run(sessionCtx,
+		chromedp.Navigate(task.Link),
+		chromedp.WaitVisible("body", chromedp.ByQuery),
+		chromedp.Evaluate(`(document.querySelector('div.price')?.innerText || '').trim()`, &singlePrice),
+		chromedp.Evaluate(`(document.querySelector('div.price_range')?.innerText || '').trim()`, &rangedPrice),
+	); err != nil {
+		return zeroPrice, err
+	}
+
+	if singlePrice != "" {
+		singlePrice = strings.TrimSpace(singlePrice)
+		prices = append(prices, s.getSinglePriceWithTax(singlePrice))
+	} else {
+		return zeroPrice, nil //return zero price immediately
+	}
+
+	if rangedPrice != "" {
+		rangedPrice = strings.TrimSpace(rangedPrice)
+		prices = append(prices, s.getMinimalPriceFromRangeWithTax(rangedPrice))
+		//no return because of optional ranged price
+	}
+
+	minimal := slices.Min(prices)
+	log.Infof(logHeader+"uuid: %s, price: %d", task.MerchUuid, minimal)
+
+	return minimal, nil
+}
+
 func (s *Parser) getSinglePriceWithTax(rawPrice string) int32 {
 	re := regexp.MustCompile(`(\d+)\s*円`)
 	matches := re.FindStringSubmatch(rawPrice)