feat: add casadellibro.com

cmd/server/main.go

@@ -10,6 +10,7 @@ import (
 	"github.com/fmartingr/bazaar/pkg/manager"
 	"github.com/fmartingr/bazaar/pkg/shop/akiracomics"
 	"github.com/fmartingr/bazaar/pkg/shop/amazon"
+	"github.com/fmartingr/bazaar/pkg/shop/casadellibro"
 	"github.com/fmartingr/bazaar/pkg/shop/gtmstore"
 	"github.com/fmartingr/bazaar/pkg/shop/heroesdepapel"
 	"github.com/fmartingr/bazaar/pkg/shop/steam"
@@ -22,6 +23,7 @@ func main() {
 	m.Register(heroesdepapel.Domains, heroesdepapel.NewHeroesDePapelShopFactory())
 	m.Register(amazon.Domains, amazon.NewAmazonShopFactory())
 	m.Register(gtmstore.Domains, gtmstore.NewGTMStoreShopFactory())
+	m.Register(casadellibro.Domains, casadellibro.NewCasaDelLibroShopFactory())
 
 	http.HandleFunc("/item", func(rw http.ResponseWriter, r *http.Request) {
 		if err := r.ParseForm(); err != nil {

pkg/shop/casadellibro/casadellibro.go

@@ -0,0 +1,103 @@
+package casadellibro
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/PuerkitoBio/goquery"
+	"github.com/fmartingr/bazaar/pkg/models"
+)
+
+const (
+	releaseDatePropertyName        = "Fecha de lanzamiento"
+	releaseDatePropertyValueFormat = "02/01/2006"
+)
+
+var Domains = []string{"www.casadellibro.com"}
+
+type CasaDelLibroShop struct {
+	domains     []string
+	priceRegexp *regexp.Regexp
+}
+
+func (s *CasaDelLibroShop) Get(url string) (*models.Product, error) {
+	res, err := http.Get(url)
+	if err != nil {
+		return nil, fmt.Errorf("error retrieving url: %s", err)
+	}
+
+	if res.StatusCode != 200 {
+		return nil, fmt.Errorf("error retrieving url: %d %s", res.StatusCode, res.Status)
+	}
+
+	doc, err := goquery.NewDocumentFromReader(res.Body)
+	if err != nil {
+		return nil, fmt.Errorf("error parsing body: %s", err)
+	}
+
+	product := models.Product{
+		URL: url,
+	}
+
+	// Price
+	seoJSON := doc.Find(`[vmid="seo"][data-body="true"]`).Text()
+
+	priceSubmatch := s.priceRegexp.FindSubmatch([]byte(seoJSON))
+	if len(priceSubmatch) != 2 {
+		return nil, fmt.Errorf("error parsing price, expected one match, found %d", len(priceSubmatch)/2)
+	}
+
+	priceNum, _ := strconv.ParseFloat(strings.ReplaceAll(string(priceSubmatch[1]), ",", "."), 64)
+	product.PriceText = string(priceSubmatch[1])
+	product.Price = priceNum
+
+	// Release date (& meta)
+	rightBlocks := doc.Find(".border-left.col-md-4.col-12")
+	if rightBlocks.Length() >= 2 {
+		rightBlocks.Eq(1).Find(".row").Each(func(i int, s *goquery.Selection) {
+			cols := s.Find(".col")
+			propertyNamme := strings.Trim(cols.First().Text(), ":")
+			if propertyNamme == releaseDatePropertyName {
+				propertyValue := cols.Eq(1).Text()
+
+				releaseDate, err := time.Parse(releaseDatePropertyValueFormat, propertyValue)
+				if err != nil {
+					log.Printf("error parsing release date: %s", err)
+					return
+				}
+
+				product.ReleaseDate = &releaseDate
+			}
+		})
+	}
+
+	doc.Find(`main.v-main`).Each(func(i int, s *goquery.Selection) {
+		imageURL, _ := s.Find(".product-image").Attr("src")
+		product.Name = strings.TrimSpace(s.Find("h1.text-h5.mb-4").Text())
+		product.InStock = s.Find("p.stock").HasClass("in-stock")
+		product.ImageURL = imageURL
+		product.Description = strings.TrimSpace(s.Find(".resume-body").Text())
+	})
+
+	return &product, nil
+}
+
+func NewCasaDelLibroShopFactory() models.ShopFactory {
+	return func() models.Shop {
+		r, err := regexp.Compile(`Price\"\:\"([\d+\.]+)`)
+		if err != nil {
+			log.Println(err)
+		}
+
+		shop := CasaDelLibroShop{
+			domains:     Domains,
+			priceRegexp: r,
+		}
+		return &shop
+	}
+}