navidrome/core/artwork/reader_artist.go
2023-01-13 22:18:34 -05:00

111 lines
2.9 KiB
Go

package artwork
import (
"context"
"errors"
"fmt"
"io"
"io/fs"
"net/http"
"os"
"path/filepath"
"strings"
"time"
"github.com/Masterminds/squirrel"
"github.com/navidrome/navidrome/log"
"github.com/navidrome/navidrome/model"
"github.com/navidrome/navidrome/utils"
)
type artistReader struct {
cacheKey
a *artwork
artist model.Artist
artistFolder string
files string
}
func newArtistReader(ctx context.Context, artwork *artwork, artID model.ArtworkID) (*artistReader, error) {
ar, err := artwork.ds.Artist(ctx).Get(artID.ID)
if err != nil {
return nil, err
}
als, err := artwork.ds.Album(ctx).GetAll(model.QueryOptions{Filters: squirrel.Eq{"album_artist_id": artID.ID}})
if err != nil {
return nil, err
}
a := &artistReader{
a: artwork,
artist: *ar,
}
a.cacheKey.lastUpdate = ar.ExternalInfoUpdatedAt
var files []string
var paths []string
for _, al := range als {
files = append(files, al.ImageFiles)
paths = append(paths, filepath.SplitList(al.Paths)...)
if a.cacheKey.lastUpdate.Before(al.UpdatedAt) {
a.cacheKey.lastUpdate = al.UpdatedAt
}
}
a.files = strings.Join(files, string(filepath.ListSeparator))
a.artistFolder = utils.LongestCommonPrefix(paths)
a.cacheKey.artID = artID
return a, nil
}
func (a *artistReader) LastUpdated() time.Time {
return a.lastUpdate
}
func (a *artistReader) Reader(ctx context.Context) (io.ReadCloser, string, error) {
return selectImageReader(ctx, a.artID,
fromArtistFolder(ctx, a.artistFolder, "artist.*"),
fromExternalFile(ctx, a.files, "artist.*"),
fromExternalSource(ctx, a.artist),
fromArtistPlaceholder(),
)
}
func fromArtistFolder(ctx context.Context, artistFolder string, pattern string) sourceFunc {
return func() (io.ReadCloser, string, error) {
fsys := os.DirFS(artistFolder)
matches, err := fs.Glob(fsys, pattern)
if err != nil {
log.Warn(ctx, "Error matching artist image pattern", "pattern", pattern, "folder", artistFolder)
return nil, "", err
}
if len(matches) == 0 {
return nil, "", errors.New("no matches for " + pattern)
}
filePath := filepath.Join(artistFolder, matches[0])
f, err := os.Open(filePath)
if err != nil {
log.Warn(ctx, "Could not open cover art file", "file", filePath, err)
return nil, "", err
}
return f, filePath, err
}
}
func fromExternalSource(ctx context.Context, ar model.Artist) sourceFunc {
return func() (io.ReadCloser, string, error) {
imageUrl := ar.ArtistImageUrl()
if !strings.HasPrefix(imageUrl, "http") {
return nil, "", nil
}
hc := http.Client{Timeout: 5 * time.Second}
req, _ := http.NewRequestWithContext(ctx, http.MethodGet, imageUrl, nil)
resp, err := hc.Do(req)
if err != nil {
return nil, "", err
}
if resp.StatusCode != http.StatusOK {
resp.Body.Close()
return nil, "", fmt.Errorf("error retrieveing cover from %s: %s", imageUrl, resp.Status)
}
return resp.Body, imageUrl, nil
}
}