support json file

example_test.go

@@ -69,3 +69,24 @@ func Example_multiLang() {
 	// 来自"Hi"包的问候: 你好, 世界!(ctx:code.google.com/p/gettext-go/examples/hi.SayHi)
 	// 來自"Hi"包的問候: 你好, 世界!(ctx:code.google.com/p/gettext-go/examples/hi.SayHi)
 }
+
+func Example_json() {
+	const jsonData = `{
+		"zh_CN": {
+			"LC_MESSAGES": {
+				"hello.json": [{
+					"msgctxt"     : "",
+					"msgid"       : "Hello, world!",
+					"msgid_plural": "",
+					"msgstr"      : ["你好, 世界!"]
+				}]
+			}
+		}
+	}`
+
+	gettext := gettext.New("hello", "???", jsonData).SetLanguage("zh_CN")
+	fmt.Println(gettext.Gettext("Hello, world!"))
+
+	// Output:
+	// 你好, 世界!
+}

fs.go

@@ -33,13 +33,19 @@ func NewFS(name string, x interface{}) FileSystem {
 		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
 	}
@@ -66,9 +72,6 @@ type nilFS struct {
 func (p *nilFS) LocaleList() []string {
 	return nil
 }
-func (p *nilFS) DomainList(locale string) []string {
-	return nil
-}
 
 func (p *nilFS) LoadMessagesFile(domain, lang, ext string) ([]byte, error) {
 	return nil, fmt.Errorf("not found")

fs_json.go

@@ -0,0 +1,66 @@
+// Copyright 2020 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 (
+	"encoding/json"
+	"fmt"
+	"sort"
+)
+
+type jsonFS struct {
+	name string
+	x    map[string]struct {
+		LC_MESSAGES map[string][]struct {
+			MsgContext  string   `json:"msgctxt"`      // msgctxt context
+			MsgId       string   `json:"msgid"`        // msgid untranslated-string
+			MsgIdPlural string   `json:"msgid_plural"` // msgid_plural untranslated-string-plural
+			MsgStr      []string `json:"msgstr"`       // msgstr translated-string
+		}
+		LC_RESOURCE map[string]map[string]string
+	}
+}
+
+func isJsonData() bool {
+	return false
+}
+
+func newJson(jsonData []byte, name string) (*jsonFS, error) {
+	p := &jsonFS{name: name}
+	if err := json.Unmarshal(jsonData, &p.x); err != nil {
+		return nil, err
+	}
+
+	return p, nil
+}
+
+func (p *jsonFS) LocaleList() []string {
+	var ss []string
+	for lang := range p.x {
+		ss = append(ss, lang)
+	}
+	sort.Strings(ss)
+	return ss
+}
+
+func (p *jsonFS) LoadMessagesFile(domain, lang, ext string) ([]byte, error) {
+	if v, ok := p.x[lang]; ok {
+		if v, ok := v.LC_MESSAGES[domain+ext]; ok {
+			return json.Marshal(v)
+		}
+	}
+	return nil, fmt.Errorf("not found")
+}
+func (p *jsonFS) LoadResourceFile(domain, lang, name string) ([]byte, error) {
+	if v, ok := p.x[lang]; ok {
+		if v, ok := v.LC_RESOURCE[domain]; ok {
+			return []byte(v[name]), nil
+		}
+	}
+	return nil, fmt.Errorf("not found")
+}
+func (p *jsonFS) String() string {
+	return "gettext.nilfs(" + p.name + ")"
+}

locale.go

@@ -114,6 +114,15 @@ func (p *_Locale) syncTrMap() {
 		}
 	}
 
+	// try load json file
+	if data, err := p.fs.LoadMessagesFile(p.domain, p.lang, ".json"); err == nil {
+		if tr, err := newJsonTranslator(p.lang, fmt.Sprintf("%s_%s.json", p.domain, p.lang), data); err == nil {
+			p.trMap[trMapKey] = tr
+			p.trCurrent = tr
+			return
+		}
+	}
+
 	// no po/mo file
 	p.trMap[trMapKey] = nilTranslator
 	p.trCurrent = nilTranslator

tr.go

@@ -5,6 +5,8 @@
 package gettext
 
 import (
+	"encoding/json"
+
 	"github.com/chai2010/gettext-go/mo"
 	"github.com/chai2010/gettext-go/plural"
 	"github.com/chai2010/gettext-go/po"
@@ -80,6 +82,41 @@ func newPoTranslator(name string, data []byte) (*translator, error) {
 	return tr, nil
 }
 
+func newJsonTranslator(lang, name string, jsonData []byte) (*translator, error) {
+	var msgList []struct {
+		MsgContext  string   `json:"msgctxt"`      // msgctxt context
+		MsgId       string   `json:"msgid"`        // msgid untranslated-string
+		MsgIdPlural string   `json:"msgid_plural"` // msgid_plural untranslated-string-plural
+		MsgStr      []string `json:"msgstr"`       // msgstr translated-string
+	}
+	if err := json.Unmarshal(jsonData, &msgList); err != nil {
+		return nil, err
+	}
+
+	var tr = &translator{
+		MessageMap:    make(map[string]mo.Message),
+		PluralFormula: plural.Formula(lang),
+	}
+
+	for _, v := range msgList {
+		var v_MsgStr string
+		var v_MsgStrPlural = v.MsgStr
+
+		if len(v.MsgStr) != 0 {
+			v_MsgStr = v.MsgStr[0]
+		}
+
+		tr.MessageMap[tr.makeMapKey(v.MsgContext, v.MsgId)] = mo.Message{
+			MsgContext:   v.MsgContext,
+			MsgId:        v.MsgId,
+			MsgIdPlural:  v.MsgIdPlural,
+			MsgStr:       v_MsgStr,
+			MsgStrPlural: v_MsgStrPlural,
+		}
+	}
+	return tr, nil
+}
+
 func (p *translator) PGettext(msgctxt, msgid string) string {
 	return p.findMsgStr(msgctxt, msgid)
 }