minor refactoring

app/localdb/utils.go

@@ -1,6 +1,44 @@
 package localdb
 
-import "reflect"
+import (
+	common "access-manager-api/app/common"
+	"encoding/json"
+	"os"
+	"reflect"
+)
+
+func (db *DB) load(localDBPath string) error {
+	db.data = make(map[string]common.Pool)
+	db.path = localDBPath
+
+	root, err := os.OpenRoot(".")
+	if err != nil {
+		return err
+	}
+	defer root.Close()
+
+	content, err := root.ReadFile(localDBPath)
+	if err != nil {
+		return err
+	}
+
+	err = json.Unmarshal(content, &db.data)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (db *DB) save() error {
+	localDBPath := db.path
+	// write to file with pretty print for readability reasons
+	json, err := json.MarshalIndent(db.data, "", "\t")
+	if err != nil {
+		return err
+	}
+	err = os.WriteFile(localDBPath, []byte(json), 0600)
+	return err
+}
 
 // MergeNonZero overwrites fields in dst with fields in src iff src is not a zero value.
 func MergeNonZero[T any](dst *T, src *T) {