agola/internal/objectstorage/objectstorage.go

67 lines
1.7 KiB
Go

// Copyright 2019 Sorint.lab
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied
// See the License for the specific language governing permissions and
// limitations under the License.
package objectstorage
import (
"errors"
"io"
"time"
)
// TODO(sgotti)
// define common errors (like notFound) so the implementations will return them
// instead of their own errors
var ErrNotExist = errors.New("does not exist")
type Storage interface {
Stat(filepath string) (*ObjectInfo, error)
ReadObject(filepath string) (io.ReadCloser, error)
WriteObject(filepath string, data io.Reader) error
DeleteObject(filepath string) error
List(prefix, startWith, delimiter string, doneCh <-chan struct{}) <-chan ObjectInfo
}
type ObjectInfo struct {
Path string
LastModified time.Time
Err error
}
// ObjStorage wraps a Storage providing additional helper functions
type ObjStorage struct {
Storage
delimiter string
}
func NewObjStorage(s Storage, delimiter string) *ObjStorage {
return &ObjStorage{Storage: s, delimiter: delimiter}
}
func (s *ObjStorage) Delimiter() string {
return s.delimiter
}
func (s *ObjStorage) List(prefix, startWith string, recursive bool, doneCh <-chan struct{}) <-chan ObjectInfo {
delimiter := s.delimiter
if recursive {
delimiter = ""
}
return s.Storage.List(prefix, startWith, delimiter, doneCh)
}