134 lines
3.4 KiB
Go
134 lines
3.4 KiB
Go
/*
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Copyright 2020, 2021 Jan Dittberner
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package services
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import (
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"context"
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"fmt"
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"github.com/BurntSushi/toml"
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"github.com/nicksnyder/go-i18n/v2/i18n"
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log "github.com/sirupsen/logrus"
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"golang.org/x/text/language"
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)
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type contextKey int
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const (
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ctxI18nBundle contextKey = iota
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ctxI18nCatalog
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)
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type MessageCatalog struct {
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messages map[string]*i18n.Message
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logger *log.Logger
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}
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func (m *MessageCatalog) AddMessages(messages map[string]*i18n.Message) {
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for key, value := range messages {
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m.messages[key] = value
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}
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}
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func (m *MessageCatalog) LookupErrorMessage(tag string, field string, value interface{}, localizer *i18n.Localizer) string {
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var message *i18n.Message
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message, ok := m.messages[fmt.Sprintf("%s-%s", field, tag)]
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if !ok {
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m.logger.Infof("no specific error message %s-%s", field, tag)
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message, ok = m.messages[tag]
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if !ok {
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m.logger.Infof("no specific error message %s", tag)
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message, ok = m.messages["unknown"]
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if !ok {
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m.logger.Warnf("no default translation found")
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return tag
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}
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}
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}
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translation, err := localizer.Localize(&i18n.LocalizeConfig{
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DefaultMessage: message,
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TemplateData: map[string]interface{}{
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"Value": value,
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},
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})
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if err != nil {
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m.logger.Error(err)
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return tag
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}
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return translation
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}
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func (m *MessageCatalog) LookupMessage(id string, templateData map[string]interface{}, localizer *i18n.Localizer) string {
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if message, ok := m.messages[id]; ok {
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translation, err := localizer.Localize(&i18n.LocalizeConfig{
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DefaultMessage: message,
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TemplateData: templateData,
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})
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if err != nil {
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switch err.(type) {
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case *i18n.MessageNotFoundErr:
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m.logger.Warnf("message %s not found: %v", id, err)
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if translation != "" {
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return translation
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}
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break
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default:
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m.logger.Error(err)
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}
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return id
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}
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return translation
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} else {
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m.logger.Warnf("no translation found for %s", id)
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return id
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}
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}
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func InitI18n(ctx context.Context, logger *log.Logger, languages []string) context.Context {
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bundle := i18n.NewBundle(language.English)
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bundle.RegisterUnmarshalFunc("toml", toml.Unmarshal)
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for _, lang := range languages {
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_, err := bundle.LoadMessageFile(fmt.Sprintf("active.%s.toml", lang))
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if err != nil {
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logger.Warnln("message bundle de.toml not found")
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}
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}
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catalog := initMessageCatalog(logger)
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ctx = context.WithValue(ctx, ctxI18nBundle, bundle)
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ctx = context.WithValue(ctx, ctxI18nCatalog, catalog)
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return ctx
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}
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func initMessageCatalog(logger *log.Logger) *MessageCatalog {
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messages := make(map[string]*i18n.Message)
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messages["ErrorTitle"] = &i18n.Message{
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ID: "ErrorTitle",
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Other: "An error has occurred",
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}
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return &MessageCatalog{messages: messages, logger: logger}
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}
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func GetI18nBundle(ctx context.Context) *i18n.Bundle {
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return ctx.Value(ctxI18nBundle).(*i18n.Bundle)
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}
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func GetMessageCatalog(ctx context.Context) *MessageCatalog {
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return ctx.Value(ctxI18nCatalog).(*MessageCatalog)
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}
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