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// Copyright 2017 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package i18n
import (
"github.com/gohugoio/hugo/common/loggers"
"github.com/gohugoio/hugo/config"
"github.com/gohugoio/hugo/helpers"
"github.com/nicksnyder/go-i18n/i18n/bundle"
jww "github.com/spf13/jwalterweatherman"
)
var (
i18nWarningLogger = helpers.NewDistinctFeedbackLogger()
)
// Translator handles i18n translations.
type Translator struct {
translateFuncs map[string]bundle.TranslateFunc
cfg config.Provider
logger *loggers.Logger
}
// NewTranslator creates a new Translator for the given language bundle and configuration.
func NewTranslator(b *bundle.Bundle, cfg config.Provider, logger *loggers.Logger) Translator {
t := Translator{cfg: cfg, logger: logger, translateFuncs: make(map[string]bundle.TranslateFunc)}
t.initFuncs(b)
return t
}
// Func gets the translate func for the given language, or for the default
// configured language if not found.
func (t Translator) Func(lang string) bundle.TranslateFunc {
if f, ok := t.translateFuncs[lang]; ok {
return f
}
t.logger.WARN.Printf("Translation func for language %v not found, use default.", lang)
if f, ok := t.translateFuncs[t.cfg.GetString("defaultContentLanguage")]; ok {
return f
}
t.logger.WARN.Println("i18n not initialized, check that you have language file (in i18n) that matches the site language or the default language.")
return func(translationID string, args ...interface{}) string {
return ""
}
}
func (t Translator) initFuncs(bndl *bundle.Bundle) {
defaultContentLanguage := t.cfg.GetString("defaultContentLanguage")
defaultT, err := bndl.Tfunc(defaultContentLanguage)
if err != nil {
jww.WARN.Printf("No translation bundle found for default language %q", defaultContentLanguage)
}
enableMissingTranslationPlaceholders := t.cfg.GetBool("enableMissingTranslationPlaceholders")
for _, lang := range bndl.LanguageTags() {
currentLang := lang
t.translateFuncs[currentLang] = func(translationID string, args ...interface{}) string {
tFunc, err := bndl.Tfunc(currentLang)
if err != nil {
jww.WARN.Printf("could not load translations for language %q (%s), will use default content language.\n", lang, err)
}
translated := tFunc(translationID, args...)
if translated != translationID {
return translated
}
// If there is no translation for translationID,
// then Tfunc returns translationID itself.
// But if user set same translationID and translation, we should check
// if it really untranslated:
if isIDTranslated(currentLang, translationID, bndl) {
return translated
}
if t.cfg.GetBool("logI18nWarnings") {
i18nWarningLogger.Printf("i18n|MISSING_TRANSLATION|%s|%s", currentLang, translationID)
}
if enableMissingTranslationPlaceholders {
return "[i18n] " + translationID
}
if defaultT != nil {
translated := defaultT(translationID, args...)
if translated != translationID {
return translated
}
if isIDTranslated(defaultContentLanguage, translationID, bndl) {
return translated
}
}
return ""
}
}
}
// If bndl contains the translationID for specified currentLang,
// then the translationID is actually translated.
func isIDTranslated(lang, id string, b *bundle.Bundle) bool {
_, contains := b.Translations()[lang][id]
return contains
}
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