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|
package files
import (
"context"
"encoding/json"
"errors"
"log"
"os"
"strings"
"github.com/rosedblabs/rosedb/v2"
progressbar "github.com/schollz/progressbar/v3"
"golang.org/x/sync/errgroup"
)
func decodeDbInfo(value []byte) (*FileInfo, error) {
var info FileInfo
if err := json.Unmarshal(value, &info); err != nil {
return nil, err
}
return &info, nil
}
func getInfoFromDb(batch *rosedb.Batch, hashsum []byte) (*FileInfo, error) {
exist, err := batch.Exist(hashsum)
if err != nil {
return nil, err
}
if !exist {
return nil, rosedb.ErrKeyNotFound
}
value, err := batch.Get(hashsum)
if err != nil {
return nil, err
}
info, err := decodeDbInfo(value)
if err != nil {
return nil, err
}
return info, err
}
func (filedata *FileInfo) evaluateFile(batch *rosedb.Batch, hashsum []byte, encoder string) error {
info, err := getInfoFromDb(batch, hashsum)
if err != nil {
return err
}
if info.Process {
return ReencodeNeeded
}
if filedata.Encoder != encoder {
return ReencodeNeeded
}
if info.AbsPath != filedata.AbsPath {
return FileMoved
}
return ReencodeNotNeeded
}
func (filedata *FileInfo) updateFile(batch *rosedb.Batch, hashsum []byte) error {
encoded, err := json.Marshal(filedata)
if err != nil {
return err
}
return batch.Put(hashsum, encoded)
}
func (filedata *FileInfo) IndexFile(ctx context.Context, hashsum []byte, batch *rosedb.Batch) error {
encoder := ctx.Value("encoder").(string)
counter := ctx.Value("counter").(*int64)
err := filedata.evaluateFile(batch, hashsum, encoder)
switch err {
case FileMoved, ReencodeNotNeeded:
filedata.Process = false
case ReencodeNeeded, rosedb.ErrKeyNotFound:
*counter += 1
default:
return err
}
if err := filedata.updateFile(batch, hashsum); err != nil {
return err
}
return nil
}
func ReencodeFlacs(ctx context.Context) error {
db := ctx.Value("database").(*rosedb.DB)
bar := progressbar.NewOptions64(
*ctx.Value("counter").(*int64),
progressbar.OptionSetDescription("Reencoding..."),
progressbar.OptionShowCount(),
)
batch := db.NewBatch(rosedb.DefaultBatchOptions)
wg := new(errgroup.Group)
wg.SetLimit(4)
iterOpts := rosedb.DefaultIteratorOptions
iterOpts.ContinueOnError = true
iter := db.NewIterator(iterOpts)
for iter.Rewind(); iter.Valid(); iter.Next() {
select {
case <-ctx.Done():
wg.Wait()
if err := batch.Commit(); err != nil {
return err
}
bar.Exit()
return nil
default:
item := iter.Item()
key := item.Key
info, err := decodeDbInfo(item.Value)
if err != nil {
log.Println(err.Error())
}
if !strings.Contains(info.AbsPath, ctx.Value("path").(string)) {
continue
} else if _, err := os.Stat(info.AbsPath); errors.Is(err, os.ErrNotExist) {
if err := batch.Delete(key); err != nil {
log.Println(err.Error())
}
} else if err != nil {
log.Println(err.Error())
} else {
if info.Process {
wg.Go(func() error {
select {
case <-ctx.Done():
return nil
default:
if err := info.reencodeFile(ctx); err != nil {
return err
}
if err := batch.Delete(key); err != nil {
return err
}
key, err = getSha256(info.AbsPath)
if err != nil {
return err
}
if err := info.updateFile(batch, key); err != nil {
return err
}
bar.Add64(1)
return nil
}
})
}
}
}
}
wg.Wait()
if err := batch.Commit(); err != nil {
return err
}
bar.Close()
return nil
}
|
