113 lines
2.4 KiB
Go
113 lines
2.4 KiB
Go
package main
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import (
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"fmt"
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"net/http"
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"net/url"
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"path"
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"strings"
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"text/template"
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"github.com/PuerkitoBio/goquery"
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"github.com/gorilla/mux"
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)
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type song struct {
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Artist string
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Title string
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Image string
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Lyrics string
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Credits map[string]string
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About [2]string
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}
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func (s *song) parseLyrics(doc *goquery.Document) {
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doc.Find("[data-lyrics-container='true']").Each(func(i int, ss *goquery.Selection) {
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if h, err := ss.Html(); err == nil {
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s.Lyrics += h
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}
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})
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}
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func (s *song) parseMetadata(doc *goquery.Document) {
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artist := doc.Find("a[class*='Artist']").First().Text()
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title := doc.Find("h1[class*='Title']").First().Text()
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image, exists := doc.Find("meta[property='og:image']").Attr("content")
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if exists {
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if u, err := url.Parse(image); err == nil {
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s.Image = fmt.Sprintf("/images%s", u.Path)
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}
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}
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s.Title = title
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s.Artist = artist
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}
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func (s *song) parseCredits(doc *goquery.Document) {
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credits := make(map[string]string)
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doc.Find("[class*='SongInfo__Credit']").Each(func(i int, ss *goquery.Selection) {
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key := ss.Children().First().Text()
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value := ss.Children().Last().Text()
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credits[key] = value
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})
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s.Credits = credits
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}
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func (s *song) parseAbout(doc *goquery.Document) {
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s.About[0] = doc.Find("[class*='SongDescription__Content']").Text()
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summary := strings.Split(s.About[0], "")
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if len(summary) > 250 {
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s.About[1] = strings.Join(summary[0:250], "") + "..."
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}
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}
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func (s *song) parse(doc *goquery.Document) {
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s.parseLyrics(doc)
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s.parseMetadata(doc)
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s.parseCredits(doc)
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s.parseAbout(doc)
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}
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func lyricsHandler(w http.ResponseWriter, r *http.Request) {
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id := mux.Vars(r)["id"]
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if data, err := getCache(id); err == nil {
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render(w, data)
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return
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}
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url := fmt.Sprintf("https://genius.com/%s-lyrics", id)
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resp, err := http.Get(url)
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if err != nil {
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write(w, http.StatusInternalServerError, []byte("can't reach genius servers"))
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return
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}
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if resp.StatusCode == http.StatusNotFound {
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write(w, http.StatusNotFound, []byte("Not found"))
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return
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}
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doc, err := goquery.NewDocumentFromReader(resp.Body)
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if err != nil {
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write(w, http.StatusInternalServerError, []byte("something went wrong"))
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return
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}
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var s song
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s.parse(doc)
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w.Header().Set("content-type", "text/html")
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t, err := template.ParseFiles(path.Join("views", "lyrics.tmpl"))
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if err != nil {
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write(w, http.StatusInternalServerError, []byte("something went wrong"))
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return
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}
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t.Execute(w, s)
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setCache(id, s)
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}
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