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// Copyright 2013 ChaiShushan <chaishushan{AT}gmail.com>. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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type fileSystem struct {
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LocaleMap map[string]bool
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func newFileSystem(path string, data []byte) *fileSystem {
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if err := fs.init(); err != nil {
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log.Printf("gettext-go: invalid domain, err = %v", err)
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func (p *fileSystem) init() error {
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zipName := func(name string) string {
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if x := strings.LastIndexAny(name, `\/`); x != -1 {
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name = strings.TrimSuffix(name, ".zip")
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if len(p.FsZipData) != 0 {
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p.FsRoot = zipName(p.FsName)
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p.LocaleMap = p.lsZip(p.FsZipData)
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// local dir or zip file
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fi, err := os.Stat(p.FsName)
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p.LocaleMap = p.lsDir(p.FsName)
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p.FsZipData, err = ioutil.ReadFile(p.FsName)
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p.FsRoot = zipName(p.FsName)
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p.LocaleMap = p.lsZip(p.FsZipData)
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func (p *fileSystem) LoadMessagesFile(domain, local, ext string) ([]byte, error) {
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if len(p.FsZipData) == 0 {
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trName := p.makeMessagesFileName(domain, local, ext)
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rcData, err := ioutil.ReadFile(trName)
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r, err := zip.NewReader(bytes.NewReader(p.FsZipData), int64(len(p.FsZipData)))
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trName := p.makeMessagesFileName(domain, local, ext)
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for _, f := range r.File {
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rcData, err := ioutil.ReadAll(rc)
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return nil, fmt.Errorf("not found")
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func (p *fileSystem) LoadResourceFile(domain, local, name string) ([]byte, error) {
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if len(p.FsZipData) == 0 {
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rcName := p.makeResourceFileName(domain, local, name)
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rcData, err := ioutil.ReadFile(rcName)
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r, err := zip.NewReader(bytes.NewReader(p.FsZipData), int64(len(p.FsZipData)))
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rcName := p.makeResourceFileName(domain, local, name)
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for _, f := range r.File {
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if f.Name != rcName {
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rcData, err := ioutil.ReadAll(rc)
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return nil, fmt.Errorf("not found")
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func (p *fileSystem) makeMessagesFileName(domain, local, ext string) string {
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return fmt.Sprintf("%s/%s/LC_MESSAGES/%s%s", p.FsRoot, local, domain, ext)
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func (p *fileSystem) makeResourceFileName(domain, local, name string) string {
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return fmt.Sprintf("%s/%s/LC_RESOURCE/%s/%s", p.FsRoot, local, domain, name)
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func (p *fileSystem) lsZip(data []byte) map[string]bool {
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r, err := zip.NewReader(bytes.NewReader(data), int64(len(data)))
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ssMap := make(map[string]bool)
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for _, f := range r.File {
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if x := strings.Index(f.Name, "LC_MESSAGES"); x != -1 {
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s := strings.TrimRight(f.Name[:x], `\/`)
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if x = strings.LastIndexAny(s, `\/`); x != -1 {
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if x := strings.Index(f.Name, "LC_RESOURCE"); x != -1 {
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s := strings.TrimRight(f.Name[:x], `\/`)
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if x = strings.LastIndexAny(s, `\/`); x != -1 {
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func (p *fileSystem) lsDir(path string) map[string]bool {
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list, err := ioutil.ReadDir(path)
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ssMap := make(map[string]bool)
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for _, dir := range list {
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ssMap[dir.Name()] = true