454 lines
8.9 KiB
Go
454 lines
8.9 KiB
Go
package main
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"log"
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"os"
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"path"
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"regexp"
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"strings"
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"text/template"
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"time"
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"slices"
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"github.com/dhowden/tag"
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"github.com/joho/godotenv"
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)
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type DownloadDirectoryComplete struct {
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Version int `json:"version"`
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LocalDirectoryName string `json:"localDirectoryName"`
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RemoteDirectoryName string `json:"remoteDirectoryName"`
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Username string `json:"username"`
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}
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var printLogs = true
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func (d *DownloadDirectoryComplete) WarnVersion() {
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supportedVersions := []int{ 0 }
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if !slices.Contains(supportedVersions, d.Version) {
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supportedVersionsStr := strings.Trim(strings.Join(strings.Fields(fmt.Sprint(supportedVersions)), ","), "[]")
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log.Printf("WARNING: Given data version not supported. Supported versions: %s. Given version: %d. Continuing, but there may be demons\n", supportedVersionsStr, d.Version)
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}
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}
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func main() {
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err := mainErr()
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if err != nil {
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log.Fatal("ERROR: ", err)
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}
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}
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func mainErr() error {
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if _, err := os.Stat(".env"); err == nil {
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if err := godotenv.Load(".env"); err != nil {
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return err
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}
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}
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execPath, _ := path.Split(os.Args[0])
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localConfPath := path.Join(execPath, "music-rename.env")
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if _, err := os.Stat(localConfPath); err == nil {
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if err := godotenv.Load(localConfPath); err != nil {
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return err
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}
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}
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directory, err := getDir()
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if err != nil {
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return err
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}
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return mainPath(directory)
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}
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func getDir() (string, error) {
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if len(os.Args) > 1 {
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return os.Args[1], nil
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} else {
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dataArg, found := os.LookupEnv("SLSKD_SCRIPT_DATA")
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if !found {
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return "", errors.New("missing any reference to a path")
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}
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var data DownloadDirectoryComplete
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if err := json.Unmarshal([]byte(dataArg), &data); err != nil {
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return "", err
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}
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data.WarnVersion()
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printLogs = false
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return data.LocalDirectoryName, nil
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}
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}
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func mainPath(directory string) error {
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if err := testEnv(); err != nil {
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return err
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}
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// parse $DATA
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files, err := os.ReadDir(directory)
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if err != nil {
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return err
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}
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if len(files) == 0 {
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return errors.New("no files found")
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}
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// read tags
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tags, _ := getTagsInDir(directory)
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// move files
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if tags != nil {
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if printLogs {
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log.Println("found tags, moving based on tags")
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}
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err := doMoveTags(directory, tags)
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if err != nil {
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return err
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}
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} else {
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if printLogs {
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log.Println("no tags found, moving to notags folder")
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}
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err := doMoveNotags(directory)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func testEnv() error {
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_, ok := os.LookupEnv("LIBRARY_ROOT")
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if !ok {
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return errors.New("missing LIBRARY_ROOT")
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}
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_, ok = os.LookupEnv("LIBRARY_FILETEMPLATE_PATH")
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if !ok {
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return errors.New("missing LIBRARY_FILETEMPLATE_PATH")
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}
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_, ok = os.LookupEnv("LIBRARY_FILETEMPLATE_FILE")
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if !ok {
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return errors.New("missing LIBRARY_FILETEMPLATE_FILE")
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}
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_, ok = os.LookupEnv("LIBRARY_NOTAGS_ROOT")
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if !ok {
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return errors.New("missing LIBRARY_NOTAGS_ROOT")
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}
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return nil
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}
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func getTagsInDir(directory string) (tag.Metadata, error) {
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files, err := os.ReadDir(directory)
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if err != nil {
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return nil, err
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}
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missingTags := false
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for _, file := range files {
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fname := path.Join(directory, file.Name())
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if file.IsDir() {
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continue
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}
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file, err := os.Open(fname)
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if err != nil {
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continue
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}
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defer file.Close()
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tags, err := tag.ReadFrom(file)
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if err != nil {
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continue
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}
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// if we found tags but they're incomplete, switch the flag
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if !checkTags(tags) {
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missingTags = true
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continue
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}
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// found tag data
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return tags, nil
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}
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// no tag data in any file
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if missingTags {
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return nil, errors.New("files have incomplete tag data")
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} else {
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return nil, errors.New("unable to read tag data")
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}
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}
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func checkTags(tags tag.Metadata) bool {
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// most important tags
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if tags.Album() == "" || tags.AlbumArtist() == "" || tags.Artist() == "" || tags.Title() == "" {
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return false
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}
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return true
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}
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func doMoveNotags(directory string) error {
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newRoot := os.Getenv("LIBRARY_NOTAGS_ROOT")
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_, folderName := path.Split(directory)
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toDirectory := path.Join(newRoot, folderName)
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return move(directory, toDirectory)
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}
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func doMoveTags(directory string, albumTags tag.Metadata) error {
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// move all tagged files
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files, err := os.ReadDir(directory)
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if err != nil {
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return err
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}
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for _, file := range files {
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if file.IsDir() {
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continue
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}
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if file.Name()[0] == '.' {
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continue
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}
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fname := path.Join(directory, file.Name())
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file, err := os.Open(fname)
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if err != nil {
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continue
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}
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defer file.Close()
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tags, err := tag.ReadFrom(file)
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if err != nil {
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continue
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}
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err = doMoveTagged(fname, tags)
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if err != nil {
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return err
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}
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}
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// move the rest
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files, err = os.ReadDir(directory)
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if err != nil {
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return err
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}
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for _, file := range files {
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if file.Name()[0] == '.' {
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continue
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}
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fname := path.Join(directory, file.Name())
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err = doMoveTaggedPathonly(fname, albumTags)
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if err != nil {
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return err
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}
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}
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// delete folder
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files, err = os.ReadDir(directory)
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if err != nil {
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return err
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}
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if len(files) == 0 {
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return os.Remove(directory)
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}
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// some files remain, wait a second to see if they go away
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time.Sleep(1 * time.Second)
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files, err = os.ReadDir(directory)
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if err != nil {
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return err
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}
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if len(files) == 0 {
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return os.Remove(directory)
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}
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return nil
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}
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type LibTemplatePath struct {
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Album string
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AlbumArtist string
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Genre string
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Year int
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}
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type LibTemplateFile struct {
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Title string
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Album string
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Artist string
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AlbumArtist string
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Composer string
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Genre string
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Year int
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Track int
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TrackCount int
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Disc int
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DiscCount int
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}
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func doMoveTagged(filePath string, fileTags tag.Metadata) error {
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libRoot := os.Getenv("LIBRARY_ROOT")
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libTemplatePath := os.Getenv("LIBRARY_FILETEMPLATE_PATH")
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libTemplateFile := os.Getenv("LIBRARY_FILETEMPLATE_FILE")
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fileExt := path.Ext(filePath)
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track, trackCount := fileTags.Track()
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disc, discCount := fileTags.Disc()
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tmplPath := template.Must(template.New("libPath").Parse(libTemplatePath))
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tmplFile := template.Must(template.New("libFile").Parse(libTemplateFile))
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tmplDataFile := LibTemplateFile{
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Title: fileTags.Title(),
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Album: fileTags.Album(),
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Artist: fileTags.Artist(),
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AlbumArtist: fileTags.AlbumArtist(),
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Composer: fileTags.Composer(),
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Genre: fileTags.Genre(),
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Year: fileTags.Year(),
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Track: track,
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TrackCount: trackCount,
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Disc: disc,
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DiscCount: discCount,
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}
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tmplDataPath := LibTemplatePath{
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Album: fileTags.Album(),
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AlbumArtist: fileTags.AlbumArtist(),
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Genre: fileTags.Genre(),
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Year: fileTags.Year(),
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}
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bufPath := bytes.NewBufferString("")
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err := tmplPath.Execute(bufPath, tmplDataPath)
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if err != nil {
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return err
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}
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bufFile := bytes.NewBufferString("")
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err = tmplFile.Execute(bufFile, tmplDataFile)
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if err != nil {
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return err
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}
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libFile := path.Join(libRoot, bufPath.String(), bufFile.String() + fileExt)
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return move(filePath, libFile)
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}
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func doMoveTaggedPathonly(filePath string, albumTags tag.Metadata) error {
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libRoot := os.Getenv("LIBRARY_ROOT")
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libTemplatePath := os.Getenv("LIBRARY_FILETEMPLATE_PATH")
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_, fileName := path.Split(filePath)
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tmplPath := template.Must(template.New("libPath").Parse(libTemplatePath))
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tmplData := LibTemplatePath{
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Album: albumTags.Album(),
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AlbumArtist: albumTags.AlbumArtist(),
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Genre: albumTags.Genre(),
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Year: albumTags.Year(),
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}
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bufPath := bytes.NewBufferString("")
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err := tmplPath.Execute(bufPath, tmplData)
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if err != nil {
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return err
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}
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libFile := path.Join(libRoot, bufPath.String(), fileName)
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return move(filePath, libFile)
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}
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func ensureDirectoryPath(filePath string) error {
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directoryPath, _ := path.Split(filePath)
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return os.MkdirAll(directoryPath, 0777)
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}
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func move(from, to string) error {
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to = cleanPath(to)
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if _, err := os.Stat(to); err == nil {
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return fmt.Errorf("file already exists: %s", to)
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}
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if err := ensureDirectoryPath(to); err != nil {
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return err
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}
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if printLogs {
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log.Printf("moving \"%s\" => \"%s\"\n", from, to)
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}
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// os.Rename gives error "invalid cross-device link"
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if err := os.Rename(from, to); err != nil {
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return moveFile(from, to)
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}
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return nil
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}
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func moveFile(source, destination string) (err error) {
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src, err := os.Open(source)
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if err != nil {
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return err
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}
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defer src.Close()
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fi, err := src.Stat()
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if err != nil {
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return err
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}
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flag := os.O_WRONLY | os.O_CREATE | os.O_TRUNC
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perm := fi.Mode() & os.ModePerm
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dst, err := os.OpenFile(destination, flag, perm)
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if err != nil {
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return err
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}
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defer dst.Close()
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_, err = io.Copy(dst, src)
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if err != nil {
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dst.Close()
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os.Remove(destination)
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return err
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}
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err = dst.Close()
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if err != nil {
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return err
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}
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err = src.Close()
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if err != nil {
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return err
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}
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err = os.Remove(source)
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if err != nil {
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return err
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}
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return nil
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}
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func cleanPath(str string) string {
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re := regexp.MustCompile(`[<>:"|?*]`)
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return re.ReplaceAllString(str, "")
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}
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