55 lignes
1,7 Kio
Go
55 lignes
1,7 Kio
Go
package languages
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import (
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"github.com/nicksnyder/go-i18n/i18n"
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"fmt"
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"html/template"
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"net/http"
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)
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// When go-i18n finds a language with >0 translations, it uses it as the Tfunc
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// However, if said language has a missing translation, it won't fallback to the "main" language
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func TfuncWithFallback(language string, languages ...string) (i18n.TranslateFunc, error) {
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// Use the last language on the args as the fallback one.
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fallbackLanguage := language
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if languages != nil {
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fallbackLanguage = languages[len(languages)-1]
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}
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T, err1 := i18n.Tfunc(language, languages...)
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fallbackT, err2 := i18n.Tfunc(fallbackLanguage)
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if err1 != nil && err2 != nil {
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// fallbackT is still a valid function even with the error, it returns translationID.
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return fallbackT, err2;
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}
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return func(translationID string, args ...interface{}) string {
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if translated := T(translationID, args...); translated != translationID {
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return translated
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}
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return fallbackT(translationID, args...)
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}, nil
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}
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func SetTranslation(tmpl *template.Template, language string, languages ...string) i18n.TranslateFunc {
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T, _ := TfuncWithFallback(language, languages...)
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tmpl.Funcs(map[string]interface{}{
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"T": func(str string, args ...interface{}) template.HTML {
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return template.HTML(fmt.Sprintf(T(str), args...))
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},
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})
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return T
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}
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func SetTranslationFromRequest(tmpl *template.Template, r *http.Request, defaultLanguage string) i18n.TranslateFunc {
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cookie, err := r.Cookie("lang")
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cookieLanguage := ""
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if err == nil {
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cookieLanguage = cookie.Value
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}
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// go-i18n supports the format of the Accept-Language header, thankfully.
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headerLanguage := r.Header.Get("Accept-Language")
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return SetTranslation(tmpl, cookieLanguage, headerLanguage, defaultLanguage)
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}
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