Add "inspect" command to CLI

cmd/inspect.go

@@ -0,0 +1,99 @@
+package cmd
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"github.com/navidrome/navidrome/conf"
+	"github.com/navidrome/navidrome/log"
+	"github.com/navidrome/navidrome/model"
+	"github.com/navidrome/navidrome/scanner"
+	"github.com/navidrome/navidrome/scanner/metadata"
+	"github.com/navidrome/navidrome/tests"
+	"github.com/pelletier/go-toml/v2"
+	"github.com/spf13/cobra"
+	"gopkg.in/yaml.v3"
+)
+
+var (
+	extractor string
+	format    string
+)
+
+func init() {
+	inspectCmd.Flags().StringVarP(&extractor, "extractor", "x", "", "extractor to use (ffmpeg or taglib, default: auto)")
+	inspectCmd.Flags().StringVarP(&format, "format", "f", "pretty", "output format (pretty, toml, yaml, json, jsonindent)")
+	rootCmd.AddCommand(inspectCmd)
+}
+
+var inspectCmd = &cobra.Command{
+	Use:   "inspect [files to inspect]",
+	Short: "Inspect tags",
+	Long:  "Show file tags as seen by Navidrome",
+	Args:  cobra.MinimumNArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		runInspector(args)
+	},
+}
+
+var marshalers = map[string]func(interface{}) ([]byte, error){
+	"pretty": prettyMarshal,
+	"toml":   toml.Marshal,
+	"yaml":   yaml.Marshal,
+	"json":   json.Marshal,
+	"jsonindent": func(v interface{}) ([]byte, error) {
+		return json.MarshalIndent(v, "", "  ")
+	},
+}
+
+func prettyMarshal(v interface{}) ([]byte, error) {
+	out := v.([]inspectorOutput)
+	var res strings.Builder
+	for i := range out {
+		res.WriteString(fmt.Sprintf("====================\nFile: %s\n\n", out[i].File))
+		t, _ := toml.Marshal(out[i].RawTags)
+		res.WriteString(fmt.Sprintf("Raw tags:\n%s\n\n", t))
+		t, _ = toml.Marshal(out[i].MappedTags)
+		res.WriteString(fmt.Sprintf("Mapped tags:\n%s\n\n", t))
+	}
+	return []byte(res.String()), nil
+}
+
+type inspectorOutput struct {
+	File       string
+	RawTags    metadata.ParsedTags
+	MappedTags model.MediaFile
+}
+
+func runInspector(args []string) {
+	if extractor != "" {
+		conf.Server.Scanner.Extractor = extractor
+	}
+	log.Info("Using extractor", "extractor", conf.Server.Scanner.Extractor)
+	md, err := metadata.Extract(args...)
+	if err != nil {
+		log.Fatal("Error extracting tags", err)
+	}
+	mapper := scanner.NewMediaFileMapper(conf.Server.MusicFolder, &tests.MockedGenreRepo{})
+	marshal := marshalers[format]
+	if marshal == nil {
+		log.Fatal("Invalid format", "format", format)
+	}
+	var out []inspectorOutput
+	for k, v := range md {
+		if !model.IsAudioFile(k) {
+			continue
+		}
+		if len(v.Tags) == 0 {
+			continue
+		}
+		out = append(out, inspectorOutput{
+			File:       k,
+			RawTags:    v.Tags,
+			MappedTags: mapper.ToMediaFile(v),
+		})
+	}
+	data, _ := marshal(out)
+	fmt.Println(string(data))
+}