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Copy pathgi18n_manager.go
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265 lines (244 loc) · 6.6 KB
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// Copyright 2019 gf Author(https://github.com/gogf/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
package gi18n
import (
"errors"
"fmt"
"github.com/gogf/gf/internal/intlog"
"strings"
"sync"
"github.com/gogf/gf/os/glog"
"github.com/gogf/gf/os/gfsnotify"
"github.com/gogf/gf/text/gregex"
"github.com/gogf/gf/util/gconv"
"github.com/gogf/gf/encoding/gjson"
"github.com/gogf/gf/os/gfile"
"github.com/gogf/gf/os/gres"
)
// Manager, it is concurrent safe, supporting hot reload.
type Manager struct {
mu sync.RWMutex
data map[string]map[string]string // Translating map.
pattern string // Pattern for regex parsing.
options Options // configuration options.
}
// Options is used for i18n object configuration.
type Options struct {
Path string // I18n files storage path.
Language string // Local language.
Delimiters []string // Delimiters for variable parsing.
}
var (
// defaultDelimiters defines the default key variable delimiters.
defaultDelimiters = []string{"{#", "}"}
)
// New creates and returns a new i18n manager.
// The optional parameter <option> specifies the custom options for i18n manager.
// It uses a default one if it's not passed.
func New(options ...Options) *Manager {
var opts Options
if len(options) > 0 {
opts = options[0]
} else {
opts = DefaultOptions()
}
if len(opts.Delimiters) == 0 {
opts.Delimiters = defaultDelimiters
}
m := &Manager{
options: opts,
pattern: fmt.Sprintf(
`%s(\w+)%s`,
gregex.Quote(opts.Delimiters[0]),
gregex.Quote(opts.Delimiters[1]),
),
}
intlog.Printf(`New: %#v`, m)
return m
}
// DefaultOptions creates and returns a default options for i18n manager.
func DefaultOptions() Options {
var (
path = "i18n"
realPath, _ = gfile.Search(path)
)
if realPath != "" {
path = realPath
// To avoid of the source path of GF: github.com/gogf/i18n/gi18n
if gfile.Exists(path + gfile.Separator + "gi18n") {
path = ""
}
}
return Options{
Path: path,
Language: "en",
Delimiters: defaultDelimiters,
}
}
// SetPath sets the directory path storing i18n files.
func (m *Manager) SetPath(path string) error {
if gres.Contains(path) {
m.options.Path = path
} else {
realPath, _ := gfile.Search(path)
if realPath == "" {
return errors.New(fmt.Sprintf(`%s does not exist`, path))
}
m.options.Path = realPath
}
intlog.Printf(`SetPath: %s`, m.options.Path)
return nil
}
// SetLanguage sets the language for translator.
func (m *Manager) SetLanguage(language string) {
m.options.Language = language
intlog.Printf(`SetLanguage: %s`, m.options.Language)
}
// SetDelimiters sets the delimiters for translator.
func (m *Manager) SetDelimiters(left, right string) {
m.pattern = fmt.Sprintf(`%s(\w+)%s`, gregex.Quote(left), gregex.Quote(right))
intlog.Printf(`SetDelimiters: %v`, m.pattern)
}
// T is alias of Translate for convenience.
func (m *Manager) T(content string, language ...string) string {
return m.Translate(content, language...)
}
// Translate translates <content> with configured language.
// The parameter <language> specifies custom translation language ignoring configured language.
func (m *Manager) Translate(content string, language ...string) string {
m.init()
m.mu.RLock()
defer m.mu.RUnlock()
transLang := m.options.Language
if len(language) > 0 && language[0] != "" {
transLang = language[0]
} else {
transLang = m.options.Language
}
data := m.data[transLang]
if data == nil {
return content
}
// Parse content as name.
if v, ok := data[content]; ok {
return v
}
// Parse content as variables container.
result, _ := gregex.ReplaceStringFuncMatch(
m.pattern, content,
func(match []string) string {
if v, ok := data[match[1]]; ok {
return v
}
return match[0]
})
intlog.Printf(`Translate for language: %s`, transLang)
return result
}
// GetValue retrieves and returns the configured content for given key and specified language.
// It returns an empty string if not found.
func (m *Manager) GetContent(key string, language ...string) string {
m.init()
m.mu.RLock()
defer m.mu.RUnlock()
transLang := m.options.Language
if len(language) > 0 && language[0] != "" {
transLang = language[0]
} else {
transLang = m.options.Language
}
if data, ok := m.data[transLang]; ok {
return data[key]
}
return ""
}
// init initializes the manager for lazy initialization design.
// The i18n manager is only initialized once.
func (m *Manager) init() {
m.mu.RLock()
// If the data is not nil, means it's already initialized.
if m.data != nil {
m.mu.RUnlock()
return
}
m.mu.RUnlock()
m.mu.Lock()
defer m.mu.Unlock()
if gres.Contains(m.options.Path) {
files := gres.ScanDirFile(m.options.Path, "*.*", true)
if len(files) > 0 {
var (
path string
name string
lang string
array []string
)
m.data = make(map[string]map[string]string)
for _, file := range files {
name = file.Name()
path = name[len(m.options.Path)+1:]
array = strings.Split(path, "/")
if len(array) > 1 {
lang = array[0]
} else {
lang = gfile.Name(array[0])
}
if m.data[lang] == nil {
m.data[lang] = make(map[string]string)
}
if j, err := gjson.LoadContent(file.Content()); err == nil {
for k, v := range j.ToMap() {
m.data[lang][k] = gconv.String(v)
}
} else {
glog.Errorf("load i18n file '%s' failed: %v", name, err)
}
}
}
} else if m.options.Path != "" {
files, _ := gfile.ScanDirFile(m.options.Path, "*.*", true)
if len(files) == 0 {
intlog.Printf(
"no i18n files found in configured directory: %s",
m.options.Path,
)
return
}
var (
path string
lang string
array []string
)
m.data = make(map[string]map[string]string)
for _, file := range files {
path = file[len(m.options.Path)+1:]
array = strings.Split(path, gfile.Separator)
if len(array) > 1 {
lang = array[0]
} else {
lang = gfile.Name(array[0])
}
if m.data[lang] == nil {
m.data[lang] = make(map[string]string)
}
if j, err := gjson.LoadContent(gfile.GetBytes(file)); err == nil {
for k, v := range j.ToMap() {
m.data[lang][k] = gconv.String(v)
}
} else {
glog.Errorf("load i18n file '%s' failed: %v", file, err)
}
}
// Monitor changes of i18n files for hot reload feature.
_, _ = gfsnotify.Add(path, func(event *gfsnotify.Event) {
// Any changes of i18n files, clear the data.
m.mu.Lock()
m.data = nil
m.mu.Unlock()
gfsnotify.Exit()
})
}
}