func GuessLang(epub *epubgo.Epub, orig_langs []string) []string {
spine, err := epub.Spine()
if err != nil {
return orig_langs
}
var err_spine error
err_spine = nil
langs := []string{}
for err_spine == nil {
html, err := spine.Open()
err_spine = spine.Next()
if err != nil {
continue
}
defer html.Close()
buff, err := ioutil.ReadAll(html)
if err != nil {
continue
}
langs = append(langs, cld2.Detect(string(buff)))
}
lang := commonLang(langs)
if lang != "un" && differentLang(lang, orig_langs) {
return []string{lang}
}
return orig_langs
}
// DetectLang3 returns the best guess 3-letter language code for a given text.
func DetectLang3(text string) (string, error) {
c := cld2.Detect(text)
b, err := language.ParseBase(c)
if err != nil {
return "", err
}
return b.ISO3(), nil
}