Unmarshall JSON using user func

config.go

@@ -53,11 +53,7 @@ func (c *config) dump() ([]byte, error) {
 	return out.Bytes(), nil
 }
 
-func (c *config) load(b []byte) (err error) {
-	return
-}
-
-// TODO: function draft, needs refactor
+// TODO: function is too heavy, needs refactor
 func (c *config) meta(prefix string) []*configField {
 	var (
 		fields = []*configField{}

demo/demo.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/json"
 	"flag"
 
 	"github.com/localhots/confection"
@@ -33,6 +34,12 @@ func main() {
 	conf := Config{
 		DatabaseConfig: DatabaseConfig{},
 	}
-	manager := confection.New(conf)
+	manager := confection.New(conf, func(b []byte) interface{} {
+		var newConf Config
+		if err := json.Unmarshal(b, &newConf); err != nil {
+			panic(err)
+		}
+		return newConf
+	})
 	manager.StartServer()
 }

manager.go

@@ -10,6 +10,7 @@ type (
 		mux          *sync.Mutex
 		conf         *config
 		file         *configFile
+		unmarshaller func([]byte) interface{}
 	}
 )
 
@@ -23,7 +24,7 @@ func SetupFlags() {
 	flag.IntVar(&serverPort, "config-port", 5050, "Config manager http port")
 }
 
-func New(conf interface{}) *Manager {
+func New(conf interface{}, unmarshaller func([]byte) interface{}) *Manager {
 	mgr := &Manager{
 		mux: &sync.Mutex{},
 		conf: &config{
@@ -32,6 +33,7 @@ func New(conf interface{}) *Manager {
 		file: &configFile{
 			path: configPath,
 		},
+		unmarshaller: unmarshaller,
 	}
 	mgr.bootstrap()
 
@@ -57,10 +59,7 @@ func (m *Manager) bootstrap() {
 			panic(err)
 		}
 
-		err = m.conf.load(b)
-		if err != nil {
-			panic(err)
-		}
+		m.importJson(b)
 	} else {
 		b, err := m.conf.dump()
 		if err != nil {
@@ -73,3 +72,7 @@ func (m *Manager) bootstrap() {
 		}
 	}
 }
+
+func (m *Manager) importJson(b []byte) {
+	m.conf.config = m.unmarshaller(b)
+}