Add local agent, only for images

core/artwork/reader_artist.go

@@ -0,0 +1,35 @@
+package artwork
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"time"
+
+	"github.com/navidrome/navidrome/conf"
+	"github.com/navidrome/navidrome/consts"
+	"github.com/navidrome/navidrome/model"
+)
+
+type artistReader struct {
+	artID model.ArtworkID
+}
+
+func newArtistReader(_ context.Context, _ *artwork, artID model.ArtworkID) (*artistReader, error) {
+	a := &artistReader{
+		artID: artID,
+	}
+	return a, nil
+}
+
+func (a *artistReader) LastUpdated() time.Time {
+	return consts.ServerStart // Invalidate cached placeholder every server start
+}
+
+func (a *artistReader) Key() string {
+	return fmt.Sprintf("placeholder.%d.0.%d", a.LastUpdated().UnixMilli(), conf.Server.CoverJpegQuality)
+}
+
+func (a *artistReader) Reader(ctx context.Context) (io.ReadCloser, string, error) {
+	return selectImageReader(ctx, a.artID, fromArtistPlaceholder())
+}