Koito/internal/importer/maloja.go
safierinx-a c2d393aa03 Fix Maloja importer resilience: nil MBZ client, null album, error handling
Root cause of the panic at ~1,693 items: importers created
`&mbz.MusicBrainzClient{}` (nil requestQueue) instead of using the
engine's properly initialized client. When any code path called an MBZ
method, it panicked on the nil channel.

Changes:
- Pass engine's MBZ client to Maloja and Spotify importers
- Change MalojaTrack.Album to pointer type to handle null album JSON
- Continue on error instead of aborting the entire import
- Accept both Maloja export formats ("scrobbles" and "list" keys)
- Extract per-file import into importFile() with its own defer/recover
- Add progress logging every 500 items

Test fixtures:
- maloja_import_null_album_test.json (null album, valid album, empty artists)
- maloja_api_format_test.json (API "list" format)

New tests: TestImportMaloja_NullAlbum, TestImportMaloja_ApiFormat

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-24 23:58:45 +05:30

110 lines
3 KiB
Go

package importer
import (
"context"
"encoding/json"
"fmt"
"os"
"path"
"strings"
"time"
"github.com/gabehf/koito/internal/catalog"
"github.com/gabehf/koito/internal/cfg"
"github.com/gabehf/koito/internal/db"
"github.com/gabehf/koito/internal/logger"
"github.com/gabehf/koito/internal/mbz"
"github.com/gabehf/koito/internal/utils"
)
type MalojaAlbum struct {
Title string `json:"albumtitle"`
}
type MalojaFile struct {
Scrobbles []MalojaExportItem `json:"scrobbles"`
List []MalojaExportItem `json:"list"`
}
type MalojaExportItem struct {
Time int64 `json:"time"`
Track MalojaTrack `json:"track"`
}
type MalojaTrack struct {
Artists []string `json:"artists"`
Title string `json:"title"`
Album *MalojaAlbum `json:"album"`
}
func ImportMalojaFile(ctx context.Context, store db.DB, mbzc mbz.MusicBrainzCaller, filename string) error {
l := logger.FromContext(ctx)
l.Info().Msgf("Beginning maloja import on file: %s", filename)
file, err := os.Open(path.Join(cfg.ConfigDir(), "import", filename))
if err != nil {
l.Err(err).Msgf("Failed to read import file: %s", filename)
return fmt.Errorf("ImportMalojaFile: %w", err)
}
defer file.Close()
var throttleFunc = func() {}
if ms := cfg.ThrottleImportMs(); ms > 0 {
throttleFunc = func() {
time.Sleep(time.Duration(ms) * time.Millisecond)
}
}
export := new(MalojaFile)
err = json.NewDecoder(file).Decode(&export)
if err != nil {
return fmt.Errorf("ImportMalojaFile: %w", err)
}
items := export.Scrobbles
if len(items) == 0 {
items = export.List
}
count := 0
total := len(items)
for i, item := range items {
martists := make([]string, 0)
// Maloja has a tendency to have the the artist order ['feature', 'main ● feature'], so
// here we try to turn that artist array into ['main', 'feature']
item.Track.Artists = utils.MoveFirstMatchToFront(item.Track.Artists, " \u2022 ")
for _, an := range item.Track.Artists {
ans := strings.Split(an, " \u2022 ")
martists = append(martists, ans...)
}
artists := utils.UniqueIgnoringCase(martists)
if len(item.Track.Artists) < 1 || item.Track.Title == "" {
l.Debug().Msg("Skipping invalid maloja import item")
continue
}
ts := time.Unix(item.Time, 0)
if !inImportTimeWindow(ts) {
l.Debug().Msgf("Skipping import due to import time rules")
continue
}
releaseTitle := ""
if item.Track.Album != nil {
releaseTitle = item.Track.Album.Title
}
opts := catalog.SubmitListenOpts{
MbzCaller: mbzc,
Artist: item.Track.Artists[0],
ArtistNames: artists,
TrackTitle: item.Track.Title,
ReleaseTitle: releaseTitle,
Time: ts.Local(),
Client: "maloja",
UserID: 1,
SkipCacheImage: !cfg.FetchImagesDuringImport(),
}
err = catalog.SubmitListen(ctx, store, opts)
if err != nil {
l.Err(err).Msgf("Failed to import maloja item %d/%d", i+1, total)
continue
}
count++
if count%500 == 0 {
l.Info().Msgf("Maloja import progress: %d/%d", count, total)
}
throttleFunc()
}
return finishImport(ctx, filename, count)
}