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// Copyright 2021, Chef. All rights reserved.
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// https://github.com/q191201771/naza
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//
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// Use of this source code is governed by a MIT-style license
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// that can be found in the License file.
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//
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// Author: Chef (191201771@qq.com)
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package filesystemlayer
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// 注意，这个package并没有完整实现所有的文件操作，使用内存作为存储时，存在一些限制
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// 目前只是服务于我另一个项目中的特定场景 https://github.com/q191201771/lal
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var (
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DefaultDiskFileSystemLayer IFileSystemLayer
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DefaultMemoryFileSystemLayer IFileSystemLayer
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)
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type IFileSystemLayer interface {
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Type() FslType
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// 创建文件
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// 原始语义：如果文件已经存在，原文件内容被清空
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Create(name string) (IFile, error)
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Rename(oldpath string, newpath string) error
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MkdirAll(path string, perm uint32) error
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Remove(name string) error
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RemoveAll(path string) error
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ReadFile(filename string) ([]byte, error)
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WriteFile(filename string, data []byte, perm uint32) error
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}
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type IFile interface {
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Write(b []byte) (n int, err error)
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Close() error
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}
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type FslType int
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const (
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FslTypeDisk FslType = 1
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FslTypeMemory = 2
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)
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func FslFactory(t FslType) IFileSystemLayer {
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switch t {
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case FslTypeDisk:
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return &FslDisk{}
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case FslTypeMemory:
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return NewFslMemory()
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}
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return nil
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}
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func init() {
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DefaultDiskFileSystemLayer = FslFactory(FslTypeDisk)
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DefaultMemoryFileSystemLayer = FslFactory(FslTypeMemory)
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}
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