Initial Bus implementation

This commit is contained in:
Ian Gulliver
2022-03-15 16:27:52 +00:00
parent eb60a6aacf
commit 88c24f1a40
5 changed files with 120 additions and 69 deletions

View File

@@ -1,74 +1,73 @@
package main
import "encoding/hex"
import "encoding/json"
import "fmt"
import "os"
import "path/filepath"
type Store struct {
root string
root string
}
func NewStore(root string) *Store {
return &Store{
root: root,
}
return &Store{
root: root,
}
}
func (s *Store) Write(obj Object) error {
dir := filepath.Join(s.root, obj.GetType())
filename := hex.EncodeToString([]byte(obj.GetId()))
dir := filepath.Join(s.root, obj.GetType())
filename := ObjectSafeId(obj)
err := os.MkdirAll(dir, 0700)
if err != nil {
return err
}
err := os.MkdirAll(dir, 0700)
if err != nil {
return err
}
tmp, err := os.CreateTemp(dir, fmt.Sprintf("%s.*", filename))
if err != nil {
return err
}
defer tmp.Close()
tmp, err := os.CreateTemp(dir, fmt.Sprintf("%s.*", filename))
if err != nil {
return err
}
defer tmp.Close()
enc := json.NewEncoder(tmp)
enc.SetEscapeHTML(false)
enc := json.NewEncoder(tmp)
enc.SetEscapeHTML(false)
err = enc.Encode(obj)
if err != nil {
return err
}
err = enc.Encode(obj)
if err != nil {
return err
}
err = tmp.Close()
if err != nil {
return err
}
err = tmp.Close()
if err != nil {
return err
}
err = os.Rename(tmp.Name(), filepath.Join(dir, filename))
if err != nil {
return err
}
err = os.Rename(tmp.Name(), filepath.Join(dir, filename))
if err != nil {
return err
}
return nil
return nil
}
func (s *Store) Read(obj Object) error {
dir := filepath.Join(s.root, obj.GetType())
filename := hex.EncodeToString([]byte(obj.GetId()))
dir := filepath.Join(s.root, obj.GetType())
filename := ObjectSafeId(obj)
fh, err := os.Open(filepath.Join(dir, filename))
if err != nil {
return err
}
defer fh.Close()
fh, err := os.Open(filepath.Join(dir, filename))
if err != nil {
return err
}
defer fh.Close()
dec := json.NewDecoder(fh)
dec.DisallowUnknownFields()
dec := json.NewDecoder(fh)
dec.DisallowUnknownFields()
err = dec.Decode(obj)
if err != nil {
return err
}
err = dec.Decode(obj)
if err != nil {
return err
}
return nil
return nil
}