76 lines
1.4 KiB
Go
76 lines
1.4 KiB
Go
package syncstore
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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)
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type FSStore struct {
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path string
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}
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func NewFSStore(path string) (*FSStore, error) {
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p, err := filepath.Abs(path)
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if err != nil {
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return nil, err
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}
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err = os.MkdirAll(p, 0700)
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if err != nil {
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return nil, err
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}
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var s = new(FSStore)
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s.path = p
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return s, nil
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}
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func (drv *FSStore) storePath(id string) string {
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return filepath.Join(drv.path, id[0:3], fmt.Sprintf("%s.json", id))
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}
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func (drv *FSStore) RawSave(s *Blob) error {
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body, err := json.Marshal(s)
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if err != nil {
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return err
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}
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filename := drv.storePath(s.ID)
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dirname := filepath.Dir(filename)
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err = os.Mkdir(dirname, 0700)
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if err != nil && !os.IsExist(err) {
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return err
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}
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f, err := os.CreateTemp(dirname, "tmp-"+s.ID+".*")
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if err != nil {
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return err
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}
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_, err = f.Write(body)
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if err != nil {
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_ = os.Remove(f.Name())
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return err
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}
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return os.Rename(f.Name(), filename)
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}
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func (drv *FSStore) RawLoad(id string) (*Blob, error) {
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body, err := ioutil.ReadFile(drv.storePath(id))
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if err != nil {
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if os.IsNotExist(err) {
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return nil, SyncNotFoundError
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}
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return nil, err
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}
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s := new(Blob)
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err = json.Unmarshal(body, s)
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return s, err
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}
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func (drv *FSStore) Exists(id string) bool {
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st, err := os.Stat(drv.storePath(id))
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if err != nil {
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return false
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}
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return (!st.IsDir()) && (st.Size() > 0)
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}
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