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package files
import (
"context"
"crypto/sha256"
"fmt"
"io"
"io/fs"
"os"
"os/exec"
"path/filepath"
"regexp"
"strings"
"time"
"github.com/briandowns/spinner"
"golang.org/x/sync/errgroup"
)
func (file *FileInfo) reencodeFile(ctx context.Context) error {
out, err := exec.Command("flac", "-8fs", "-j4", file.AbsPath).Output()
if err != nil {
fmt.Printf("%v\n", out)
return err
}
file.Encoder = ctx.Value("encoder").(string)
file.Process = false
return nil
}
func getEncoderVer(path string) (string, error) {
out, err := exec.Command("metaflac", "--show-vendor-tag", path).Output()
if err != nil {
return "", err
}
r := regexp.MustCompile("libFLAC \\d\\.\\d\\.\\d")
encoder := r.FindString(string(out))
switch encoder {
case "":
return "", nil
default:
return strings.Split(encoder, " ")[1], nil
}
}
func getInfoFromFile(path string, info fs.DirEntry) (*FileInfo, error) {
var filedata FileInfo
filedata.Process = true
tmp, err := info.Info()
if err != nil {
return nil, err
}
filedata.Modtime = tmp.ModTime()
abspath, err := filepath.Abs(path)
if err != nil {
return nil, err
}
filedata.AbsPath = abspath
encoder, err := getEncoderVer(path)
if err != nil {
return nil, err
}
filedata.Encoder = encoder
return &filedata, nil
}
func getSha256(path string) ([]byte, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
defer file.Close()
hash := sha256.New()
if _, err := io.Copy(hash, file); err != nil {
return nil, err
}
return hash.Sum(nil), nil
}
func IndexFlacs(ctx context.Context) error {
spin := spinner.New(spinner.CharSets[9], 100*time.Millisecond)
spin.Suffix = " Indexing flacs..."
spin.Start()
wg := new(errgroup.Group)
wg.SetLimit(100)
if err := filepath.WalkDir(ctx.Value("path").(string), func(path string, info fs.DirEntry, err error) error {
select {
case <-ctx.Done():
spin.FinalMSG = "Stopping...\n"
spin.Stop()
return filepath.SkipAll
default:
if err != nil {
return err
}
if !info.IsDir() {
if filepath.Ext(path) == ".flac" {
wg.Go(func() error {
select {
case <-ctx.Done():
return nil
default:
data, err := getInfoFromFile(path, info)
if err != nil {
return err
}
hashsum, err := getSha256(path)
if err != nil {
return err
}
return data.IndexFile(ctx, hashsum)
}
})
}
}
return nil
}
}); err != nil {
return err
}
wg.Wait()
spin.FinalMSG = "Done indexing flacs\n"
spin.Stop()
return nil
}
|
