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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 (
"reflect"
"strings"
"github.com/gohugoio/hugo/common/hreflect"
"github.com/gohugoio/hugo/common/loggers"
"github.com/gohugoio/hugo/config"
"github.com/gohugoio/hugo/helpers"
"github.com/nicksnyder/go-i18n/v2/i18n"
)
type translateFunc func(translationID string, templateData interface{}) string
var (
i18nWarningLogger = helpers.NewDistinctFeedbackLogger()
)
// Translator handles i18n translations.
type Translator struct {
translateFuncs map[string]translateFunc
cfg config.Provider
logger *loggers.Logger
}
// NewTranslator creates a new Translator for the given language bundle and configuration.
func NewTranslator(b *i18n.Bundle, cfg config.Provider, logger *loggers.Logger) Translator {
t := Translator{cfg: cfg, logger: logger, translateFuncs: make(map[string]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) translateFunc {
if f, ok := t.translateFuncs[lang]; ok {
return f
}
t.logger.INFO.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.INFO.Println("i18n not initialized; if you need string translations, check that you have a bundle in /i18n that matches the site language or the default language.")
return func(translationID string, args interface{}) string {
return ""
}
}
func (t Translator) initFuncs(bndl *i18n.Bundle) {
enableMissingTranslationPlaceholders := t.cfg.GetBool("enableMissingTranslationPlaceholders")
for _, lang := range bndl.LanguageTags() {
currentLang := lang
currentLangStr := currentLang.String()
currentLangKey := strings.TrimPrefix(currentLangStr, artificialLangTagPrefix)
localizer := i18n.NewLocalizer(bndl, currentLangStr)
t.translateFuncs[currentLangKey] = func(translationID string, templateData interface{}) string {
if templateData != nil {
tp := reflect.TypeOf(templateData)
if hreflect.IsNumber(tp.Kind()) {
// This was how go-i18n worked in v1.
templateData = map[string]interface{}{
"Count": templateData,
}
}
}
translated, translatedLang, err := localizer.LocalizeWithTag(&i18n.LocalizeConfig{
MessageID: translationID,
TemplateData: templateData,
})
if err == nil && currentLang == translatedLang {
return translated
}
if _, ok := err.(*i18n.MessageNotFoundErr); !ok {
t.logger.WARN.Printf("Failed to get translated string for language %q and ID %q: %s", currentLangStr, translationID, err)
}
if t.cfg.GetBool("logI18nWarnings") {
i18nWarningLogger.Printf("i18n|MISSING_TRANSLATION|%s|%s", currentLangStr, translationID)
}
if enableMissingTranslationPlaceholders {
return "[i18n] " + translationID
}
return translated
}
}
}
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