virtual folders: change dataprovider structure

This way we no longer depend on the local file system path and so we can
add support for cloud backends in future updates

vfs/folder.go

@@ -13,7 +13,8 @@ import (
 // quota limits or a different virtual path.
 type BaseVirtualFolder struct {
 	ID            int64  `json:"id"`
-	MappedPath    string `json:"mapped_path"`
+	Name          string `json:"name"`
+	MappedPath    string `json:"mapped_path,omitempty"`
 	UsedQuotaSize int64  `json:"used_quota_size"`
 	// Used quota as number of files
 	UsedQuotaFiles int `json:"used_quota_files"`
@@ -23,6 +24,21 @@ type BaseVirtualFolder struct {
 	Users []string `json:"users,omitempty"`
 }
 
+// GetACopy returns a copy
+func (v *BaseVirtualFolder) GetACopy() BaseVirtualFolder {
+	users := make([]string, len(v.Users))
+	copy(users, v.Users)
+	return BaseVirtualFolder{
+		ID:              v.ID,
+		Name:            v.Name,
+		MappedPath:      v.MappedPath,
+		UsedQuotaSize:   v.UsedQuotaSize,
+		UsedQuotaFiles:  v.UsedQuotaFiles,
+		LastQuotaUpdate: v.LastQuotaUpdate,
+		Users:           users,
+	}
+}
+
 // GetUsersAsString returns the list of users as comma separated string
 func (v *BaseVirtualFolder) GetUsersAsString() string {
 	return strings.Join(v.Users, ",")