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// Copyright 2013 ChaiShushan <chaishushan{AT}gmail.com>. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package gettext
import (
"archive/zip"
"bytes"
"fmt"
)
type FileSystem interface {
LocaleList() []string
LoadMessagesFile(domain, lang, ext string) ([]byte, error)
LoadResourceFile(domain, lang, name string) ([]byte, error)
String() string
}
func NewFS(name string, x interface{}) FileSystem {
if x == nil {
if name != "" {
return OS(name)
}
return NilFS(name)
}
switch x := x.(type) {
case []byte:
if len(x) == 0 {
return OS(name)
}
if r, err := zip.NewReader(bytes.NewReader(x), int64(len(x))); err == nil {
return ZipFS(r, name)
}
if fs, err := newJson(x, name); err == nil {
return fs
}
case string:
if len(x) == 0 {
return OS(name)
}
if r, err := zip.NewReader(bytes.NewReader([]byte(x)), int64(len(x))); err == nil {
return ZipFS(r, name)
}
if fs, err := newJson([]byte(x), name); err == nil {
return fs
}
case FileSystem:
return x
}
return NilFS(name)
}
func OS(root string) FileSystem {
return newOsFS(root)
}
func ZipFS(r *zip.Reader, name string) FileSystem {
return newZipFS(r, name)
}
func NilFS(name string) FileSystem {
return &nilFS{name}
}
type nilFS struct {
name string
}
func (p *nilFS) LocaleList() []string {
return nil
}
func (p *nilFS) LoadMessagesFile(domain, lang, ext string) ([]byte, error) {
return nil, fmt.Errorf("not found")
}
func (p *nilFS) LoadResourceFile(domain, lang, name string) ([]byte, error) {
return nil, fmt.Errorf("not found")
}
func (p *nilFS) String() string {
return "gettext.nilfs(" + p.name + ")"
}
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