/
search.go
370 lines (316 loc) · 12 KB
/
search.go
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package cardfightwiki
import (
"fmt"
"net/url"
"strconv"
"strings"
"github.com/antchfx/htmlquery"
"github.com/antchfx/xpath"
"golang.org/x/net/html"
"github.com/jeandeaual/tts-deckconverter/log"
)
const (
wikiBaseURL = "https://cardfight.fandom.com/wiki/"
wikiSearchURL = wikiBaseURL + "Special:Search"
)
var (
searchResultLinkXPath *xpath.Expr
englishImageURLXPath *xpath.Expr
japaneseImageURLXPath *xpath.Expr
defaultImageURLXPath *xpath.Expr
englishNameXPath *xpath.Expr
kanjiNameXPath *xpath.Expr
kanaNameXPath *xpath.Expr
gradeSkillXPath *xpath.Expr
cardTypeXPath *xpath.Expr
powerXPath *xpath.Expr
criticalXPath *xpath.Expr
shieldXPath *xpath.Expr
nationXPath *xpath.Expr
clanXPath *xpath.Expr
raceXPath *xpath.Expr
triggerEffectXPath *xpath.Expr
formatsXPath *xpath.Expr
flavorXPath *xpath.Expr
effectXPath *xpath.Expr
hrefXPath *xpath.Expr
)
func init() {
searchResultLinkXPath = xpath.MustCompile(`//a[contains(@class,'result-link')]`)
englishImageURLXPath = xpath.MustCompile(`//span[contains(@class,'English')]/a/@href`)
japaneseImageURLXPath = xpath.MustCompile(`//span[contains(@class,'Japanese')]/a/@href`)
defaultImageURLXPath = xpath.MustCompile(`//div[contains(@style,'float:left;')]/a/@href`)
englishNameXPath = xpath.MustCompile(`//td[normalize-space(text())='Name']/following-sibling::node()`)
kanjiNameXPath = xpath.MustCompile(`//td[normalize-space(text())='Kanji']/following-sibling::node()`)
kanaNameXPath = xpath.MustCompile(`//td[normalize-space(text())='Kana']/following-sibling::node()`)
cardTypeXPath = xpath.MustCompile(`//td[normalize-space(text())='Card Type']/following-sibling::node()`)
gradeSkillXPath = xpath.MustCompile(`//td[normalize-space(text())='Grade / Skill']/following-sibling::node()`)
powerXPath = xpath.MustCompile(`//td[normalize-space(text())='Power']/following-sibling::node()`)
criticalXPath = xpath.MustCompile(`//td[normalize-space(text())='Critical']/following-sibling::node()`)
shieldXPath = xpath.MustCompile(`//td[normalize-space(text())='Shield']/following-sibling::node()`)
nationXPath = xpath.MustCompile(`//td[normalize-space(text())='Nation']/following-sibling::node()`)
clanXPath = xpath.MustCompile(`//td[normalize-space(text())='Clan']/following-sibling::node()`)
raceXPath = xpath.MustCompile(`//td[normalize-space(text())='Race']/following-sibling::node()`)
triggerEffectXPath = xpath.MustCompile(`//td[normalize-space(text())='Trigger Effect']/following-sibling::node()`)
formatsXPath = xpath.MustCompile(`//td[normalize-space(text())='Format']/following-sibling::node()`)
flavorXPath = xpath.MustCompile(`//table[contains(@class,'flavor')]//td`)
effectXPath = xpath.MustCompile(`//table[contains(@class,'effect')]//td`)
hrefXPath = xpath.MustCompile(`/@href`)
}
func trimImageURL(imageURL string) string {
if idx := strings.LastIndex(imageURL, "/revision/latest?cb="); idx != -1 {
return imageURL[:idx]
}
return imageURL
}
func getLinkFromTag(link *html.Node, linkName string, searchURL string, linkNumber int) (string, error) {
hrefTag := htmlquery.QuerySelector(link, hrefXPath)
if hrefTag == nil {
return "", fmt.Errorf("No href tag found in link number %d (%s) of %s", linkNumber+1, linkName, searchURL)
}
return htmlquery.InnerText(hrefTag), nil
}
func search(cardName string, preferPremium bool) (string, error) {
parsedURL, err := url.Parse(wikiSearchURL)
if err != nil {
return "", fmt.Errorf("couldn't parse URL %s: %w", wikiSearchURL, err)
}
q := parsedURL.Query()
q.Set("query", "\""+cardName+"\"")
parsedURL.RawQuery = q.Encode()
searchURL := parsedURL.String()
log.Infof("Searching for card %s with %s", cardName, searchURL)
searchResult, err := htmlquery.LoadURL(searchURL)
if err != nil {
return "", fmt.Errorf("couldn't query %s: %w", searchURL, err)
}
links := htmlquery.QuerySelectorAll(searchResult, searchResultLinkXPath)
if links == nil {
return "", fmt.Errorf("no result link found in %s (XPath: %s)", searchURL, searchResultLinkXPath)
}
for i, link := range links {
linkName := htmlquery.InnerText(link)
if linkName == cardName+" (V Series)" && !preferPremium {
href, err := getLinkFromTag(link, linkName, searchURL, i)
if err != nil {
log.Warn(err)
continue
}
log.Debugf("Found link %s for card %s", href, cardName)
return href, nil
}
if cardName == linkName {
href, err := getLinkFromTag(link, linkName, searchURL, i)
if err != nil {
log.Warn(err)
continue
}
log.Debugf("Found link %s for card %s", href, cardName)
return href, nil
}
}
for i, link := range links {
linkName := htmlquery.InnerText(link)
vSeries := strings.HasSuffix(linkName, "(V Series)")
if preferPremium && vSeries {
continue
}
href, err := getLinkFromTag(link, linkName, searchURL, i)
if err != nil {
log.Warn(err)
continue
}
log.Debugf("Found link %s for card %s", href, cardName)
return href, nil
}
return "", fmt.Errorf("couldn't find link in %s for card %s", searchURL, cardName)
}
func innerText(node *html.Node) string {
var value string
for child := node.FirstChild; child != nil; child = child.NextSibling {
if child.Type == html.ElementNode && child.Data == "noscript" {
continue
}
value += htmlquery.InnerText(child)
}
return strings.TrimSpace(value)
}
func parseTextNode(node *html.Node) string {
var value string
for child := node.FirstChild; child != nil; child = child.NextSibling {
if child.Type == html.TextNode {
value += htmlquery.InnerText(child)
}
}
return strings.TrimSpace(value)
}
func parseTextNodeAsInt(node *html.Node) (int, error) {
var value string
for child := node.FirstChild; child != nil; child = child.NextSibling {
if child.Type == html.TextNode {
value += htmlquery.InnerText(child)
}
}
return strconv.Atoi(strings.TrimSpace(value))
}
func parseLinkNode(node *html.Node) string {
var value string
for child := node.FirstChild; child != nil; child = child.NextSibling {
if child.Type == html.TextNode {
value += htmlquery.InnerText(child)
} else if child.Type == html.ElementNode && child.Data == "a" {
value += htmlquery.InnerText(child)
}
}
return strings.TrimSpace(value)
}
func getOptionalStringValue(cardPage *html.Node, xpathExpr *xpath.Expr, value **string) {
node := htmlquery.QuerySelector(cardPage, xpathExpr)
if node != nil {
parsedValue := parseTextNode(node)
if len(parsedValue) > 0 {
*value = &parsedValue
}
}
}
func getOptionalStringValueFromLink(cardPage *html.Node, xpathExpr *xpath.Expr, value **string) {
node := htmlquery.QuerySelector(cardPage, xpathExpr)
if node != nil {
parsedValue := parseLinkNode(node)
if len(parsedValue) > 0 {
*value = &parsedValue
}
}
}
func getOptionalIntValue(cardPage *html.Node, cardPageURL string, fieldName string, xpathExpr *xpath.Expr, value **int) {
node := htmlquery.QuerySelector(cardPage, xpathExpr)
if node != nil {
parsedValue, err := parseTextNodeAsInt(node)
if err == nil {
*value = &parsedValue
}
}
}
func getCardImages(cardPage *html.Node, cardPageURL string, card *Card) error {
englishImageURL := htmlquery.QuerySelector(cardPage, englishImageURLXPath)
if englishImageURL == nil {
// On some pages, only the English image is available
englishImageURL = htmlquery.QuerySelector(cardPage, defaultImageURLXPath)
if englishImageURL == nil {
return fmt.Errorf("no English image found in %s (XPath: %s and %s)", cardPageURL, englishImageURLXPath, defaultImageURLXPath)
}
card.EnglishImageURL = trimImageURL(htmlquery.InnerText(englishImageURL))
return nil
}
card.EnglishImageURL = trimImageURL(htmlquery.InnerText(englishImageURL))
japaneseImageURL := htmlquery.QuerySelector(cardPage, japaneseImageURLXPath)
if japaneseImageURL == nil {
return fmt.Errorf("no Japanese image found in %s (XPath: %s)", cardPageURL, japaneseImageURLXPath)
}
card.JapaneseImageURL = trimImageURL(htmlquery.InnerText(japaneseImageURL))
return nil
}
func getCardNames(cardPage *html.Node, cardPageURL string, card *Card) error {
englishName := htmlquery.QuerySelector(cardPage, englishNameXPath)
if englishName == nil {
return fmt.Errorf("no English name found in %s (XPath: %s)", cardPageURL, englishNameXPath)
}
card.EnglishName = strings.TrimSpace(htmlquery.InnerText(englishName))
japaneseName := htmlquery.QuerySelector(cardPage, kanjiNameXPath)
if japaneseName == nil {
japaneseName = htmlquery.QuerySelector(cardPage, kanaNameXPath)
if japaneseName == nil {
return fmt.Errorf("no Japanese name found in %s (XPath: %s and %s)", cardPageURL, kanjiNameXPath, kanaNameXPath)
}
}
card.JapaneseName = strings.TrimSpace(htmlquery.InnerText(japaneseName))
return nil
}
// GetCard retrieves a card's information from https://cardfight.fandom.com/
func GetCard(cardName string, preferPremium bool) (Card, error) {
var card Card
cardPageURL, err := search(cardName, preferPremium)
if err != nil {
return card, err
}
cardPage, err := htmlquery.LoadURL(cardPageURL)
if err != nil {
return card, fmt.Errorf("couldn't query %s: %w", cardPageURL, err)
}
err = getCardImages(cardPage, cardPageURL, &card)
if err != nil {
return card, err
}
err = getCardNames(cardPage, cardPageURL, &card)
if err != nil {
return card, err
}
getOptionalStringValueFromLink(cardPage, cardTypeXPath, &card.Type)
gradeSkill := htmlquery.QuerySelector(cardPage, gradeSkillXPath)
if gradeSkill == nil {
return card, fmt.Errorf("no grade / skill found in %s (XPath: %s)", cardPageURL, gradeSkillXPath)
}
split := strings.Split(innerText(gradeSkill), " / ")
card.Grade, err = strconv.Atoi(strings.TrimPrefix(strings.TrimSpace(split[0]), "Grade "))
if err != nil {
return card, fmt.Errorf("invalid grade value found in %s: %s", cardPageURL, split[0])
}
if len(split) > 1 {
skill := strings.TrimSpace(split[1])
card.Skill = &skill
}
getOptionalStringValue(cardPage, powerXPath, &card.Power)
getOptionalIntValue(cardPage, cardPageURL, "critical", criticalXPath, &card.Critical)
getOptionalIntValue(cardPage, cardPageURL, "shield", shieldXPath, &card.Shield)
getOptionalStringValue(cardPage, nationXPath, &card.Nation)
getOptionalStringValueFromLink(cardPage, clanXPath, &card.Clan)
getOptionalStringValueFromLink(cardPage, raceXPath, &card.Race)
getOptionalStringValue(cardPage, triggerEffectXPath, &card.TriggerEffect)
formats := htmlquery.QuerySelector(cardPage, formatsXPath)
if formats == nil {
return card, fmt.Errorf("no format found in %s (XPath: %s)", cardPageURL, formatsXPath)
}
card.Formats = strings.Split(parseTextNode(formats), " / ")
flavor := htmlquery.QuerySelector(cardPage, flavorXPath)
if flavor != nil {
var sb strings.Builder
for child := flavor.FirstChild; child != nil; child = child.NextSibling {
if child.Type == html.ElementNode && child.Data == "br" {
sb.WriteString("\n")
} else {
sb.WriteString(htmlquery.InnerText(child))
}
}
flavor := strings.TrimSpace(sb.String())
card.Flavor = &flavor
}
effect := htmlquery.QuerySelector(cardPage, effectXPath)
if effect != nil {
var effectText string
for child := effect.FirstChild; child != nil; child = child.NextSibling {
if child.Type == html.ElementNode && child.Data == "br" {
effectText += "\n"
} else if child.Type == html.ElementNode && child.Data == "b" {
effectText += "[b]" + strings.TrimSpace(htmlquery.InnerText(child)) + "[/b]"
} else if child.Type == html.ElementNode && child.Data == "i" {
effectText += "[i]" + strings.TrimSpace(htmlquery.InnerText(child)) + "[/i]"
} else if child.Type == html.ElementNode && child.Data == "font" {
color := "-"
for _, attr := range child.Attr {
if attr.Key == "color" {
switch attr.Val {
case "red":
color = "ff0000"
}
}
}
effectText += "[" + color + "]" + strings.TrimSpace(htmlquery.InnerText(child)) + "[-]"
} else {
effectText += htmlquery.InnerText(child)
}
}
effectText = strings.TrimSpace(effectText)
card.Effect = &effectText
}
return card, nil
}