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filerepo.go
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filerepo.go
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package provider
import (
"bytes"
"encoding/gob"
"errors"
"os"
"path/filepath"
"github.com/andrescosta/goico/pkg/ioutil"
pb "github.com/andrescosta/jobico/internal/api/types"
)
var ErrFileExists = errors.New("file exists")
const (
metFileExt = ".met"
dirMeta = "meta"
dirFiles = "content"
)
type (
FileRepo struct {
dirFile string
dirMeta string
}
)
func NewFileRepo(baseDir string) *FileRepo {
return &FileRepo{
dirFile: filepath.Join(baseDir, dirFiles),
dirMeta: filepath.Join(baseDir, dirMeta),
}
}
func (f *FileRepo) File(tenant string, name string) ([]byte, error) {
return file(name, f.dirFile, tenant)
}
func file(name string, dirs ...string) ([]byte, error) {
full := filepath.Join(dirs...)
fname := filepath.Clean(filepath.Join(full, name))
res, err := os.ReadFile(fname)
if err != nil {
return nil, err
}
return res, nil
}
func (f *FileRepo) Files() ([]*pb.TenantFiles, error) {
dirs, err := ioutil.Dirs(f.dirFile)
if err != nil {
return nil, err
}
ts := make([]*pb.TenantFiles, 0)
for _, dir := range dirs {
fd := filepath.Join(f.dirFile, dir.Name())
files, err := ioutil.Files(fd)
if err != nil {
return nil, err
}
fs := make([]*pb.File, 0)
for _, file := range files {
m, err := f.GetMetadataForFile(dir.Name(), file.Name())
if err != nil {
return nil, err
}
fs = append(fs, &pb.File{Name: file.Name(), Type: pb.File_FileType(m.FileType)})
}
ts = append(ts, &pb.TenantFiles{Tenant: dir.Name(), Files: fs})
}
return ts, nil
}
func (f *FileRepo) Add(tenant string, name string, fileType int32, bytes []byte) error {
if err := addFile(name, bytes, f.dirFile, tenant); err != nil {
return err
}
if err := f.WriteMetadataForFile(tenant, name, fileType); err != nil {
return err
}
return nil
}
func addFile(name string, bytes []byte, dirs ...string) error {
full := filepath.Join(dirs...)
if err := os.MkdirAll(full, 0o700); err != nil {
return err
}
fulPath := filepath.Join(full, name)
e, err := ioutil.FileExists(fulPath)
if err != nil {
return err
}
if e {
return ErrFileExists
}
if err := os.WriteFile(fulPath, bytes, 0o600); err != nil {
return err
}
return nil
}
func (f *FileRepo) WriteMetadataForFile(tenant string, name string, fileType int32) error {
var buf bytes.Buffer
enc := gob.NewEncoder(&buf)
if err := enc.Encode(Metadata{FileType: fileType}); err != nil {
return err
}
if err := addFile(name+metFileExt, buf.Bytes(), f.dirMeta, tenant); err != nil {
return err
}
return nil
}
func (f *FileRepo) GetMetadataForFile(tenant string, name string) (*Metadata, error) {
c, err := file(name+metFileExt, f.dirMeta, tenant)
if err != nil {
if os.IsNotExist(err) {
return &Metadata{}, nil
}
return nil, err
}
buf := bytes.NewBuffer(c)
dec := gob.NewDecoder(buf)
metadata := Metadata{}
if err := dec.Decode(&metadata); err != nil {
return nil, err
}
return &metadata, nil
}