feat: enrich playlist album via file metadata (#307)

* feat: enrich playlist album via file metadata

* Refactor enrich command to use normalized source key

- Rename 'from' option to 'source' in command documentation- Update PlaylistEnrich function to correctly handle normalized source keys- Improve source key handling logic for album metadata extraction- Clarify source usage in the 'cliamp playlist enrich' command description

* feat: normalize song path

Replacing forward-slash instead of backslash to have less interference when sorting playlist by path

* feat: enrich elements year via file metadata

cmd/playlist.go

@@ -607,7 +607,14 @@ func PlaylistBookmarks() error {
 }
 
 // PlaylistEnrich probes duration and derives album metadata for SSH tracks.
-func PlaylistEnrich(name string) error {
+func PlaylistEnrich(name string, source string) error {
+	src := normalizeSortKey(source)
+	switch src {
+	case "path", "metadata":
+	default:
+		return fmt.Errorf("unsupported source key %q (use path or metadata)", source)
+	}
+
 	prov, err := newProvider()
 	if err != nil {
 		return err
@@ -637,9 +644,23 @@ func PlaylistEnrich(name string) error {
 		}
 
 		if t.Album == "" {
-			if dir := albumFromPath(t.Path); dir != "" {
-				tracks[i].Album = dir
+			if src == "path" {
+				if dir := albumFromPath(t.Path); dir != "" {
+					tracks[i].Album = dir
+					changed = true
+				}
+			} else if src == "metadata" {
+				if album := probeAlbum(t.Path); album != "" {
+					tracks[i].Album = album
+					changed = true
+				}
+			}
+		}
+		if t.Year == 0 {
+			if year := probeYear(t.Path); year != 0 {
+				tracks[i].Year = year
 				changed = true
+				fmt.Fprintf(os.Stderr, "  %s: %d\n", t.DisplayName(), year)
 			}
 		}
 
@@ -717,6 +738,16 @@ func parseProbeDuration(out []byte) int {
 	return int(dur)
 }
 
+func probeYear(path string) int {
+	t := playlist.TrackFromPath(path)
+	return t.Year
+}
+
+func probeAlbum(path string) string {
+	t := playlist.TrackFromPath(path)
+	return t.Album
+}
+
 func albumFromPath(path string) string {
 	if path == "" || playlist.IsURL(path) {
 		return ""
@@ -744,7 +775,9 @@ func collectLocalAudio(paths []string) ([]string, error) {
 		if err != nil {
 			return nil, fmt.Errorf("scanning %q: %w", p, err)
 		}
-		all = append(all, files...)
+		for _, f := range files {
+			all = append(all, strings.ReplaceAll(f, "\\", "/"))
+		}
 	}
 	return all, nil
 }

commands.go

@@ -603,11 +603,14 @@ func playlistCommand() *cli.Command {
 				Name:      "enrich",
 				Usage:     "probe duration and album metadata for SSH tracks",
 				ArgsUsage: "\"Name\"",
+				Flags: []cli.Flag{
+					&cli.StringFlag{Name: "source", Usage: "source: metadata, path", Value: "path"},
+				},
 				Action: func(ctx context.Context, c *cli.Command) error {
 					if c.Args().Len() == 0 {
-						return fmt.Errorf("usage: cliamp playlist enrich \"Name\"")
+						return fmt.Errorf("usage: cliamp playlist enrich \"Name\" --source metadata")
 					}
-					return cmd.PlaylistEnrich(c.Args().First())
+					return cmd.PlaylistEnrich(c.Args().First(), c.String("source"))
 				},
 			},
 		},

docs/cli.md

@@ -162,8 +162,9 @@ cliamp playlist export "Name" --format pls     # export as PLS to stdout
 cliamp playlist import mix.m3u --name "Name"   # import local M3U/M3U8/PLS
 cliamp playlist bookmark "Name" --index 3      # toggle bookmark flag
 cliamp playlist bookmarks                       # list bookmarked tracks
-cliamp playlist enrich "Name"                  # probe duration/album metadata
-cliamp playlist delete "Name"                 # delete entire playlist
+cliamp playlist enrich "Name"                   # probe duration/album 
+cliamp playlist enrich "Name" --source metadata   # probe duration/album (forces to use the file's metadata as source)
+cliamp playlist delete "Name"                   # delete entire playlist
 ```
 
 Sort keys: `track`, `title`, `artist`, `album`, `artist+album`, `path`.