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refactor: introduce typed resource kind

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This commit is contained in:
Mathis Maquenne
2026-08-05 11:33:13 +02:00
parent 3ec258b876
commit 714d567603
11 changed files with 113 additions and 96 deletions
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internal/deezer/album.go
-4
View File
@@ -48,10 +48,6 @@ Duration: %s
)
}
func (a *Album) GetType() string {
return "Album"
}
func (a *Album) GetTitle() string {
return a.Results.Data.Title
}
internal/deezer/artist.go
-4
View File
@@ -51,10 +51,6 @@ func (a *Artist) String() string {
return b.String()
}
func (a *Artist) GetType() string {
return "Artist"
}
func (a *Artist) GetTitle() string {
return a.Results.Data.Name
}
internal/deezer/client.go
+20 -25
View File
@@ -59,7 +59,12 @@ func resolveSession(ctx context.Context, appConfig *config.Config) (*Session, er
return session, nil
}
func (c *Client) FetchResource(ctx context.Context, resource Resource, id string) error {
func (c *Client) FetchResource(ctx context.Context, kind Kind, id string) (Resource, error) {
resource, err := kind.newResource()
if err != nil {
return nil, err
}
payload := map[string]interface{}{
"nb": 10000,
"start": 0,
@@ -68,46 +73,32 @@ func (c *Client) FetchResource(ctx context.Context, resource Resource, id string
"tags": true,
"header": true,
}
var idKey string
switch resource.(type) {
case *Playlist:
idKey = "playlist_id"
case *Album:
idKey = "alb_id"
case *Artist:
idKey = "art_id"
case *Single:
idKey = "sng_id"
default:
return fmt.Errorf("unsupported resource type: %T", resource)
}
payload[idKey] = id
payload[kind.idKey()] = id
jsonData, err := json.Marshal(payload)
if err != nil {
return err
return nil, err
}
url := fmt.Sprintf("https://www.deezer.com/ajax/gw-light.php?method=deezer.page%s&input=3&api_version=1.0&api_token=%s", resource.GetType(), c.Session.APIToken)
url := fmt.Sprintf("https://www.deezer.com/ajax/gw-light.php?method=deezer.page%s&input=3&api_version=1.0&api_token=%s", kind.pageMethod(), c.Session.APIToken)
req, err := http.NewRequestWithContext(ctx, "POST", url, bytes.NewBuffer(jsonData))
if err != nil {
return err
return nil, err
}
resp, err := c.Session.HttpClient.Do(req)
if err != nil {
return err
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("unexpected status code: %d", resp.StatusCode)
return nil, fmt.Errorf("unexpected status code: %d", resp.StatusCode)
}
body, err := io.ReadAll(resp.Body)
if err != nil {
return err
return nil, err
}
bodyStr := string(body)
@@ -121,15 +112,19 @@ func (c *Client) FetchResource(ctx context.Context, resource Resource, id string
{`"DATA_ERROR":"song::getData"`, "invalid track ID"},
} {
if strings.Contains(bodyStr, check.marker) {
return fmt.Errorf("%s", check.errMsg)
return nil, fmt.Errorf("%s", check.errMsg)
}
}
if strings.Contains(bodyStr, `"results":{}`) {
return fmt.Errorf("unexpected response")
return nil, fmt.Errorf("unexpected response")
}
return resource.Unmarshal(body)
if err := resource.Unmarshal(body); err != nil {
return nil, err
}
return resource, nil
}
func (c *Client) FetchMedia(ctx context.Context, track *Track, quality string) (*Media, error) {
internal/deezer/kind.go
+57
View File
@@ -0,0 +1,57 @@
package deezer
import "fmt"
type Kind string
const (
KindAlbum Kind = "album"
KindPlaylist Kind = "playlist"
KindArtist Kind = "artist"
KindTrack Kind = "track"
)
func (k Kind) pageMethod() string {
switch k {
case KindAlbum:
return "Album"
case KindPlaylist:
return "Playlist"
case KindArtist:
return "Artist"
case KindTrack:
return "Track"
}
return ""
}
func (k Kind) idKey() string {
switch k {
case KindAlbum:
return "alb_id"
case KindPlaylist:
return "playlist_id"
case KindArtist:
return "art_id"
case KindTrack:
return "sng_id"
}
return ""
}
func (k Kind) newResource() (Resource, error) {
switch k {
case KindAlbum:
return &Album{}, nil
case KindPlaylist:
return &Playlist{}, nil
case KindArtist:
return &Artist{}, nil
case KindTrack:
return &Single{}, nil
}
return nil, fmt.Errorf("unsupported resource type: %s", k)
}
internal/deezer/playlist.go
-4
View File
@@ -37,10 +37,6 @@ Duration: %s
)
}
func (p *Playlist) GetType() string {
return "Playlist"
}
func (p *Playlist) GetTitle() string {
return p.Results.Data.Title
}
internal/deezer/resource.go
-1
View File
@@ -2,7 +2,6 @@ package deezer
type Resource interface {
GetTitle() string
GetType() string
GetTracks() []*Track
SetTracks(tracks []*Track)
GetOutputDir(outputDir string) string
internal/deezer/single.go
-4
View File
@@ -36,10 +36,6 @@ Duration: %s
)
}
func (s *Single) GetType() string {
return "Track"
}
func (s *Single) GetTitle() string {
if s.Results.Data == nil {
return ""
internal/deezer/track.go
+2 -2
View File
@@ -47,14 +47,14 @@ func (t *Track) GetTitle() string {
return t.Title
}
func (t *Track) GetFileName(resourceType, mediaFormat string) string {
func (t *Track) Filename(kind Kind, mediaFormat string) string {
ext := "mp3"
if mediaFormat == "FLAC" {
ext = "flac"
}
prefix := ""
if resourceType == "album" {
if kind == KindAlbum {
if n, err := strconv.Atoi(t.TrackNumber); err == nil {
prefix = fmt.Sprintf("%02d. ", n)
} else {
internal/downloader/client.go
+11 -30
View File
@@ -23,7 +23,7 @@ const chunkSize = 2048
type Client struct {
appConfig *config.Config
resourceType string
kind deezer.Kind
deezerClient *deezer.Client
hashIndexOnce sync.Once
@@ -31,10 +31,10 @@ type Client struct {
hashIndexErr error
}
func New(appConfig *config.Config, resourceType string) *Client {
func New(appConfig *config.Config, kind deezer.Kind) *Client {
return &Client{
appConfig: appConfig,
resourceType: resourceType,
appConfig: appConfig,
kind: kind,
}
}
@@ -66,24 +66,20 @@ func (c *Client) initDeezerClient(ctx context.Context, opts Options) error {
}
func (c *Client) prepareResource(ctx context.Context, id string, opts Options) (deezer.Resource, string, error) {
resource, err := c.createResource()
resource, err := c.deezerClient.FetchResource(ctx, c.kind, id)
if err != nil {
return nil, "", err
}
if err := c.deezerClient.FetchResource(ctx, resource, id); err != nil {
return nil, "", fmt.Errorf("failed to fetch resource: %w", err)
}
tracks := resource.GetTracks()
if len(tracks) == 0 {
if c.resourceType == "track" {
if c.kind == deezer.KindTrack {
return nil, "", fmt.Errorf("track with ID %s not found", id)
}
return nil, "", fmt.Errorf("%s has no tracks", c.resourceType)
return nil, "", fmt.Errorf("%s has no tracks", c.kind)
}
if c.resourceType == "artist" && len(tracks) > opts.Limit {
if c.kind == deezer.KindArtist && len(tracks) > opts.Limit {
resource.SetTracks(tracks[:opts.Limit])
}
@@ -95,30 +91,15 @@ func (c *Client) prepareResource(ctx context.Context, id string, opts Options) (
return resource, outputDir, nil
}
func (c *Client) createResource() (deezer.Resource, error) {
switch c.resourceType {
case "album":
return &deezer.Album{}, nil
case "playlist":
return &deezer.Playlist{}, nil
case "artist":
return &deezer.Artist{}, nil
case "track":
return &deezer.Single{}, nil
default:
return nil, fmt.Errorf("unsupported resource type: %s", c.resourceType)
}
}
func (c *Client) downloadAllTracks(ctx context.Context, resource deezer.Resource, opts Options, outputDir string) error {
tracks := resource.GetTracks()
startTime := time.Now()
if c.resourceType != "track" {
if c.kind != deezer.KindTrack {
fmt.Printf("%s\n\nStarting download...\n\n", resource)
}
progress := newProgressTracker(len(tracks), c.resourceType)
progress := newProgressTracker(len(tracks), c.kind)
for i, track := range tracks {
if ctx.Err() != nil {
@@ -169,7 +150,7 @@ func (c *Client) downloadTrack(ctx context.Context, resource deezer.Resource, tr
dlCtx, cancel := context.WithTimeout(ctx, opts.Timeout)
defer cancel()
fileName := track.GetFileName(c.resourceType, mediaFormat)
fileName := track.Filename(c.kind, mediaFormat)
outputPath := path.Join(outputDir, fileName)
key := crypto.GetBlowfishKey(track.ID)
internal/downloader/progress.go
+7 -7
View File
@@ -25,15 +25,15 @@ type downloadStats struct {
}
type progressTracker struct {
stats downloadStats
totalTracks int
resourceType string
stats downloadStats
totalTracks int
kind deezer.Kind
}
func newProgressTracker(totalTracks int, resourceType string) *progressTracker {
func newProgressTracker(totalTracks int, kind deezer.Kind) *progressTracker {
return &progressTracker{
totalTracks: totalTracks,
resourceType: resourceType,
totalTracks: totalTracks,
kind: kind,
}
}
@@ -84,7 +84,7 @@ func (pt *progressTracker) handleResult(index int, track *deezer.Track, result d
}
func (pt *progressTracker) printSummary(outputDir string, elapsed time.Duration) {
if pt.resourceType != "track" {
if pt.kind != deezer.KindTrack {
warningsLine := ""
if pt.stats.warnings > 0 {
warningsLine = fmt.Sprintf("\nWarnings: %d", pt.stats.warnings)