a correct implementation of filer

go/filer/filer_embedded.go

@@ -0,0 +1,64 @@
+package filer
+
+import (
+	"path/filepath"
+)
+
+type FilerEmbedded struct {
+	directories *DirectoryManagerInMap
+	files       *FileListInLevelDb
+}
+
+func NewFilerEmbedded(dir string) (filer *FilerEmbedded, err error) {
+	dm, de := NewDirectoryManagerInMap(filepath.Join(dir, "dir.log"))
+	if de != nil {
+		return nil, de
+	}
+	fl, fe := NewFileListInLevelDb(dir)
+	if fe != nil {
+		return nil, fe
+	}
+	filer = &FilerEmbedded{
+		directories: dm,
+		files:       fl,
+	}
+	return
+}
+
+func (filer *FilerEmbedded) CreateFile(filePath string, fid string) (err error) {
+	dir, file := filepath.Split(filePath)
+	dirId, e := filer.directories.MakeDirectory(dir)
+	if e != nil {
+		return e
+	}
+	return filer.files.CreateFile(dirId, file, fid)
+}
+func (filer *FilerEmbedded) FindFile(filePath string) (fid string, err error) {
+	dir, file := filepath.Split(filePath)
+	dirId, e := filer.directories.FindDirectory(dir)
+	if e != nil {
+		return "", e
+	}
+	return filer.files.FindFile(dirId, file)
+}
+func (filer *FilerEmbedded) ListDirectories(dirPath string) (dirs []DirectoryEntry, err error) {
+	return filer.directories.ListDirectories(dirPath)
+}
+func (filer *FilerEmbedded) ListFiles(dirPath string, lastFileName string, limit int) (files []FileEntry, err error) {
+	dirId, e := filer.directories.FindDirectory(dirPath)
+	if e != nil {
+		return nil, e
+	}
+	return filer.files.ListFiles(dirId, lastFileName, limit), nil
+}
+func (filer *FilerEmbedded) DeleteDirectory(dirPath string) (err error) {
+	return filer.directories.DeleteDirectory(dirPath)
+}
+func (filer *FilerEmbedded) DeleteFile(filePath string) (fid string, err error) {
+	dir, file := filepath.Split(filePath)
+	dirId, e := filer.directories.FindDirectory(dir)
+	if e != nil {
+		return "", e
+	}
+	return filer.files.DeleteFile(dirId, file)
+}