middleware: support i18n

@@ -10,85 +10,51 @@
 
 package middleware
 
-//import (
-//	"github.com/astaxie/beego/config"
-//	"os"
-//	"path"
-//)
-
-//type Translation struct {
-//	filetype     string
-//	CurrentLocal string
-//	Locales      map[string]map[string]string
-//}
-
-//func NewLocale(filetype string) *Translation {
-//	return &Translation{
-//		filetype:     filetype,
-//		CurrentLocal: "zh",
-//		Locales:      make(map[string]map[string]string),
-//	}
-//}
-
-//func (t *Translation) loadTranslations(dirPath string) error {
-//	dir, err := os.Open(dirPath)
-//	if err != nil {
-//		return err
-//	}
-//	defer dir.Close()
-
-//	names, err := dir.Readdirnames(-1)
-//	if err != nil {
-//		return err
-//	}
-
-//	for _, name := range names {
-//		fullPath := path.Join(dirPath, name)
-
-//		fi, err := os.Stat(fullPath)
-//		if err != nil {
-//			return err
-//		}
-
-//		if fi.IsDir() {
-//			continue
-//		} else {
-//			if err := t.loadTranslation(fullPath, name); err != nil {
-//				return err
-//			}
-//		}
-//	}
-
-//	return nil
-//}
-
-//func (t *Translation) loadTranslation(fullPath, locale string) error {
-
-//	sourceKey2Trans, ok := t.Locales[locale]
-//	if !ok {
-//		sourceKey2Trans = make(map[string]string)
-
-//		t.Locales[locale] = sourceKey2Trans
-//	}
-
-//	for _, m := range trf.Messages {
-//		if m.Translation != "" {
-//			sourceKey2Trans[sourceKey(m.Source, m.Context)] = m.Translation
-//		}
-//	}
-
-//	return nil
-//}
-
-//func (t *Translation) SetLocale(local string) {
-//	t.CurrentLocal = local
-//}
-
-//func (t *Translation) Translate(key string) string {
-//	if ct, ok := t.Locales[t.CurrentLocal]; ok {
-//		if v, o := ct[key]; o {
-//			return v
-//		}
-//	}
-//	return key
-//}
+import (
+	"encoding/json"
+	"io/ioutil"
+	"os"
+)
+
+type Translation struct {
+	filepath     string
+	CurrentLocal string
+	Locales      map[string]map[string]string
+}
+
+func NewLocale(filepath string, defaultlocal string) *Translation {
+	i18n := make(map[string]map[string]string)
+	file, err := os.Open(filepath)
+	if err != nil {
+		panic("open " + filepath + " err :" + err.Error())
+	}
+	data, err := ioutil.ReadAll(file)
+	if err != nil {
+		panic("read " + filepath + " err :" + err.Error())
+	}
+	err = json.Unmarshal(data, &i18n)
+	if err != nil {
+		panic("json.Unmarshal " + filepath + " err :" + err.Error())
+	}
+	return &Translation{
+		filepath:     filepath,
+		CurrentLocal: defaultlocal,
+		Locales:      i18n,
+	}
+}
+
+func (t *Translation) SetLocale(local string) {
+	t.CurrentLocal = local
+}
+
+func (t *Translation) Translate(key string, local string) string {
+	if local == "" {
+		local = t.CurrentLocal
+	}
+	if ct, ok := t.Locales[key]; ok {
+		if v, o := ct[local]; o {
+			return v
+		}
+	}
+	return key
+}