156 lines
3.9 KiB
Go
156 lines
3.9 KiB
Go
// Copyright 2026 Alibaba Group
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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// Package i18n provides lightweight internationalization for the DWS CLI.
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//
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// At startup call Init() (or let the package auto-init via the init function).
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// Use T("key") to get a translated string, or Tf("key", args...) for formatted
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// translations with fmt.Sprintf-style placeholders.
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//
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// The active language is resolved from the DWS_LANG environment variable first,
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// then falls back to the LANG environment variable. If neither is set or does
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// not match a supported locale, "en" (English) is used as the default.
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//
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// Message catalogs are stored as JSON files under locales/ and embedded at
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// compile time via go:embed.
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//
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// Supported locales:
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// - "en" — English (default)
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// - "zh" — Simplified Chinese
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package i18n
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import (
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"embed"
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"encoding/json"
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"fmt"
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"os"
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"strings"
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"sync"
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"github.com/DingTalk-Real-AI/dingtalk-workspace-cli/pkg/configmeta"
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"golang.org/x/text/language"
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)
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func init() {
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configmeta.Register(configmeta.ConfigItem{
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Name: "DWS_LANG",
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Category: configmeta.CategoryCore,
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Description: "界面语言 (en/zh)，回退到 LANG",
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DefaultValue: "en",
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Example: "zh",
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})
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}
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//go:embed locales/*.json
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var localeFS embed.FS
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// lang is the resolved language tag for the current session.
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var (
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lang language.Tag
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langStr string
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once sync.Once
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enCatalog map[string]string
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zhCatalog map[string]string
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)
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func init() {
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Init()
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}
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// Init resolves the active locale from environment variables and loads
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// the message catalogs from embedded JSON files. Safe to call multiple
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// times; only the first call takes effect.
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func Init() {
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once.Do(func() {
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enCatalog = loadCatalog("en")
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zhCatalog = loadCatalog("zh")
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raw := strings.TrimSpace(os.Getenv("DWS_LANG"))
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if raw == "" {
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raw = strings.TrimSpace(os.Getenv("LANG"))
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}
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setLangFromRaw(raw)
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})
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}
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// SetLang overrides the active locale. Intended for testing.
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func SetLang(tag string) {
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setLangFromRaw(tag)
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}
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func setLangFromRaw(raw string) {
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raw = strings.ToLower(strings.TrimSpace(raw))
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switch {
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case strings.HasPrefix(raw, "zh"):
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lang = language.Chinese
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langStr = "zh"
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default:
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lang = language.English
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langStr = "en"
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}
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}
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// Lang returns the current language tag string ("en" or "zh").
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func Lang() string {
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return langStr
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}
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// LangTag returns the resolved language.Tag.
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func LangTag() language.Tag {
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return lang
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}
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// T returns the translated string for the given message key.
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// If the key is not found in the active catalog, the key itself is returned.
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func T(key string) string {
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catalog := catalogForLang(langStr)
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if msg, ok := catalog[key]; ok {
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return msg
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}
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// Fallback: try English catalog
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if langStr != "en" {
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if msg, ok := enCatalog[key]; ok {
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return msg
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}
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}
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return key
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}
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// Tf returns a formatted translated string. The key is looked up in the
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// active message catalog and the result is passed through fmt.Sprintf with
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// the provided arguments.
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func Tf(key string, args ...any) string {
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return fmt.Sprintf(T(key), args...)
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}
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func catalogForLang(l string) map[string]string {
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switch l {
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case "zh":
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return zhCatalog
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default:
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return enCatalog
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}
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}
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func loadCatalog(lang string) map[string]string {
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data, err := localeFS.ReadFile("locales/" + lang + ".json")
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if err != nil {
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return map[string]string{}
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}
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var catalog map[string]string
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if err := json.Unmarshal(data, &catalog); err != nil {
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return map[string]string{}
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}
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return catalog
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}
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