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restaurant-search/build/tabelog.go

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/*
* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package main
import (
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"errors"
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"fmt"
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"strconv"
"strings"
"github.com/PuerkitoBio/goquery"
)
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type tabelog struct {
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scrapeCtx
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}
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func (tabelog) define(keyword string) semantics {
return map[string]semantics{
"dishes": {accomodating: 0.0, affordable: 0.0, atmospheric: 0.0, delicious: 0.8},
"drinks": {accomodating: 0.0, affordable: 0.0, atmospheric: 0.0, delicious: 0.2},
"service": {accomodating: 1.0, affordable: 0.0, atmospheric: 0.0, delicious: 0.0},
"cost": {accomodating: 0.0, affordable: 1.0, atmospheric: 0.0, delicious: 0.0},
"atmosphere": {accomodating: 0.0, affordable: 0.0, atmospheric: 1.0, delicious: 0.0},
}[keyword]
}
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func (tabelog) index(doc *goquery.Document) (string, []string) {
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var reviewUrls []string
doc.Find("div.list-rst__header > p > a").Each(func(index int, sel *goquery.Selection) {
if href, ok := sel.Attr("href"); ok {
reviewUrls = append(reviewUrls, href)
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}
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})
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var nextIndexUrl string
if href, ok := doc.Find("a.c-pagination__target--next").Attr("href"); ok {
nextIndexUrl = href
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}
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return nextIndexUrl, reviewUrls
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}
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func (tabelog) review(doc *goquery.Document) (name, address string, features map[string]float64, weight float64, err error) {
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if name = doc.Find("a.rd-header__rst-name-main").Text(); len(name) == 0 {
err = errors.New("invalid value for name")
return
}
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if addresses := doc.Find("p.rd-detail-info__rst-address"); addresses.Length() == 2 {
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address = strings.TrimSpace(addresses.First().Text())
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} else {
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err = errors.New("invalid value for address")
return
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}
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features = make(map[string]float64)
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for index, category := range []string{"dishes", "service", "atmosphere", "cost", "drinks"} {
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valueText := doc.Find(fmt.Sprintf("dl#js-rating-detail > dd:nth-child(%d)", (index+1)*2)).Text()
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var value float64
if value, err = strconv.ParseFloat(valueText, 8); err != nil {
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err = fmt.Errorf("invalid value for %s", category)
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return
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}
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features[category] = value/2.5 - 1.0
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}
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weight, err = strconv.ParseFloat(doc.Find("a.rd-header__rst-reviews-target > b").Text(), 8)
if err != nil {
err = fmt.Errorf("invalid value for review count")
return
}
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return
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}