✨ add i18n support

common/i18n/cache.go

@@ -0,0 +1,62 @@
+package i18n
+
+import (
+	"context"
+	"net/http"
+
+	i18n2 "github.com/nicksnyder/go-i18n/v2/i18n"
+	"golang.org/x/text/language"
+	"google.golang.org/grpc/metadata"
+)
+
+/*
+type Cache interface {
+	GetLocalizer() (*i18n2.Localizer, bool)
+	SetLocalizer(l *i18n2.Localizer)
+}
+*/
+
+func getLocalizer(ctx context.Context) (*i18n2.Localizer, bool) {
+	v := ctx.Value(I18nKey)
+	if l, b := v.(*i18n2.Localizer); b {
+		return l, true
+	}
+	return nil, false
+}
+
+func withRequest(r *http.Request, currentLang language.Tag, bundle *i18n2.Bundle) *http.Request {
+
+	accept := r.Header.Get(defaultLangHeaderKey)
+	localizer := i18n2.NewLocalizer(bundle, accept)
+	ctx := setLocalizer(r.Context(), localizer)
+	ctx = setCurrentLang(ctx, currentLang)
+	ctx = metadata.AppendToOutgoingContext(ctx, defaultLangHeaderKey, accept)
+	return r.WithContext(ctx)
+}
+
+func setCurrentLang(ctx context.Context, currentLang language.Tag) context.Context {
+	return context.WithValue(ctx, I18nCurrentLangKey, currentLang)
+}
+
+func setLocalizer(ctx context.Context, l *i18n2.Localizer) context.Context {
+	return context.WithValue(ctx, I18nKey, l)
+}
+
+func IsHasI18n(ctx context.Context) bool {
+	v := ctx.Value(I18nKey)
+	if v != nil {
+		return true
+	}
+	return false
+}
+
+// func isHasI18n(ctx context.Context) bool {
+//	if use, exist := ctx.Value(isUseI18n).(bool); exist {
+//		return use
+//	}
+//	return false
+// }
+//
+// func setHasI18n(ctx context.Context, use bool) context.Context {
+//	return context.WithValue(ctx, isUseI18n, use)
+// }