From b368ac3b7c9b73d96ebf8fb5a91fdee6be6226ec Mon Sep 17 00:00:00 2001
From: Shelikhoo <xiaokangwang@outlook.com>
Date: Tue, 7 Sep 2021 13:02:09 +0100
Subject: [PATCH] added general purpose tagged features config loader

---
 common/taggedfeatures/configloader.go | 35 +++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 common/taggedfeatures/configloader.go

diff --git a/common/taggedfeatures/configloader.go b/common/taggedfeatures/configloader.go
new file mode 100644
index 000000000..14728bf23
--- /dev/null
+++ b/common/taggedfeatures/configloader.go
@@ -0,0 +1,35 @@
+package taggedfeatures
+
+import (
+	"context"
+	"encoding/json"
+	"github.com/v2fly/v2ray-core/v4/common/serial"
+	"github.com/v2fly/v2ray-core/v4/infra/conf/v5cfg"
+	"google.golang.org/protobuf/types/known/anypb"
+)
+
+func LoadJsonConfig(ctx context.Context, interfaceType, defaultImpl string, message json.RawMessage) (*Config, error) {
+	type ItemStub struct {
+		MemberType string          `json:"type"`
+		Tag        string          `json:"tag"`
+		Value      json.RawMessage `json:"settings"`
+	}
+	type namedStub []ItemStub
+	var stub namedStub
+	err := json.Unmarshal(message, &stub)
+	if err != nil {
+		return nil, err
+	}
+	config := &Config{Features: map[string]*anypb.Any{}}
+	for _, v := range stub {
+		if v.MemberType == "" {
+			v.MemberType = defaultImpl
+		}
+		pack, err := v5cfg.LoadHeterogeneousConfigFromRawJson(ctx, interfaceType, v.MemberType, v.Value)
+		if err != nil {
+			return nil, err
+		}
+		config.Features[v.Tag] = serial.ToTypedMessage(pack)
+	}
+	return config, nil
+}