Modifying data range

build/build.go

@@ -102,10 +102,6 @@ func computeStnData(restaurants []restaurant, stationsPath string) error {
 	return nil
 }
 
-func buildFeatures(r restaurant) (delicious, accommodating, affordable, atmospheric float64) {
-	return r.features["food"], r.features["service"], r.features["value"], r.features["atmosphere"]
-}
-
 func dumpData(dbPath string, restaraunts []restaurant) error {
 	db, err := sql.Open("sqlite3", dbPath)
 	if err != nil {
@@ -135,8 +131,6 @@ func dumpData(dbPath string, restaraunts []restaurant) error {
 	}
 
 	for _, r := range restaraunts {
-		delicious, accommodating, affordable, atmospheric := buildFeatures(r)
-
 		_, err = db.Exec(`
 			INSERT INTO reviews(
 				name,
@@ -153,10 +147,10 @@ func dumpData(dbPath string, restaraunts []restaurant) error {
 			) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
 			r.name,
 			r.url,
-			delicious,
+			r.feats.delicious,
-			accommodating,
+			r.feats.accommodating,
-			affordable,
+			r.feats.affordable,
-			atmospheric,
+			r.feats.atmospheric,
 			r.longitude,
 			r.latitude,
 			r.closestStnDist,

build/scrape.go

@@ -30,12 +30,19 @@ import (
 	"github.com/PuerkitoBio/goquery"
 )
 
+type features struct {
+	delicious     float64
+	accommodating float64
+	affordable    float64
+	atmospheric   float64
+}
+
 type restaurant struct {
 	name    string
 	address string
 	url     string
 
-	features map[string]float64
+	feats features
 
 	latitude  float64
 	longitude float64
@@ -46,7 +53,7 @@ type restaurant struct {
 
 type scraper interface {
 	index(doc *goquery.Document) (string, []string)
-	review(doc *goquery.Document) (string, string, map[string]float64, error)
+	review(doc *goquery.Document) (string, string, features, error)
 }
 
 func makeAbsUrl(ref, base string) (string, error) {
@@ -90,17 +97,17 @@ func scrapeReview(url string, out chan restaurant, wc *webCache, group *sync.Wai
 		return
 	}
 
-	name, address, features, err := scr.review(doc)
+	name, address, feats, err := scr.review(doc)
 	if err != nil {
 		log.Printf("failed to scrape review at %s (%v)", url, err)
 		return
 	}
 
 	out <- restaurant{
-		name:     name,
+		name:    name,
-		address:  address,
+		address: address,
-		features: features,
+		feats:   feats,
-		url:      url}
+		url:     url}
 }
 
 func scrapeIndex(indexUrl string, out chan restaurant, wc *webCache, scr scraper) {

build/tabelog.go

@@ -50,7 +50,7 @@ func (tabelog) index(doc *goquery.Document) (string, []string) {
 	return nextIndexUrl, reviewUrls
 }
 
-func (tabelog) review(doc *goquery.Document) (name, address string, features map[string]float64, err error) {
+func (tabelog) review(doc *goquery.Document) (name, address string, feat features, err error) {
 	name = doc.Find("a.rd-header__rst-name-main").Text()
 
 	if addresses := doc.Find("p.rd-detail-info__rst-address"); addresses.Length() == 2 {
@@ -60,14 +60,19 @@ func (tabelog) review(doc *goquery.Document) (name, address string, features map
 		return
 	}
 
-	features = make(map[string]float64)
+	f := make(map[string]float64)
 	for index, category := range []string{"dishes", "service", "atmosphere", "cost", "drinks"} {
 		text := doc.Find(fmt.Sprintf("#js-rating-detail > dd:nth-child(%d)", (index+1)*2)).Text()
-		if features[category], err = strconv.ParseFloat(text, 8); err != nil {
+		if f[category], err = strconv.ParseFloat(text, 8); err != nil {
 			err = fmt.Errorf("invalid value for %s", category)
 			return
 		}
 	}
 
+	feat.accommodating = f["service"]/2.5 - 1.0
+	feat.affordable = f["cost"]/2.5 - 1.0
+	feat.atmospheric = f["atmosphere"]/2.5 - 1.0
+	feat.delicious = f["dishes"]/2.5 - 1.0
+
 	return
 }

build/tripadvisor.go

@@ -50,7 +50,7 @@ func (tripadvisor) index(doc *goquery.Document) (string, []string) {
 	return nextIndexUrl, reviewUrls
 }
 
-func (tripadvisor) review(doc *goquery.Document) (name, address string, features map[string]float64, err error) {
+func (tripadvisor) review(doc *goquery.Document) (name, address string, feat features, err error) {
 	name = strings.TrimSpace(doc.Find("h1#HEADING").Text())
 	address = strings.TrimSpace(doc.Find("address span.format_address").Text())
 
@@ -60,15 +60,20 @@ func (tripadvisor) review(doc *goquery.Document) (name, address string, features
 		return
 	}
 
-	features = make(map[string]float64)
+	f := make(map[string]float64)
 	for index, category := range []string{"food", "service", "value", "atmosphere"} {
 		alt, _ := ratings.Eq(index).Attr("alt")
 		rating := strings.Split(alt, " ")[0]
-		if features[category], err = strconv.ParseFloat(rating, 8); err != nil {
+		if f[category], err = strconv.ParseFloat(rating, 8); err != nil {
 			err = fmt.Errorf("invalid value for %s", category)
 			return
 		}
 	}
 
+	feat.accommodating = f["service"]/2.5 - 1.0
+	feat.affordable = f["value"]/2.5 - 1.0
+	feat.atmospheric = f["atmosphere"]/2.5 - 1.0
+	feat.delicious = f["food"]/2.5 - 1.0
+
 	return
 }