paginate artist album fetching for deezer and qobuz

internal/provider/qobuz/client.go

@@ -122,6 +122,9 @@ func (c *Client) GetMetadata(ctx context.Context, item, mediaType string) (map[s
 	if mediaType == "label" {
 		return c.getLabel(ctx, item)
 	}
+	if mediaType == "artist" {
+		return c.getArtist(ctx, item)
+	}
 
 	params := url.Values{}
 	params.Set("app_id", c.cfg.Session.Qobuz.AppID)
@@ -130,8 +133,6 @@ func (c *Client) GetMetadata(ctx context.Context, item, mediaType string) (map[s
 	params.Set("offset", "0")
 
 	switch mediaType {
-	case "artist":
-		params.Set("extra", "albums")
 	case "playlist":
 		params.Set("extra", "tracks")
 	case "label":
@@ -358,6 +359,77 @@ func (c *Client) getLabel(ctx context.Context, labelID string) (map[string]any,
 	return resp, nil
 }
 
+func (c *Client) getArtist(ctx context.Context, artistID string) (map[string]any, error) {
+	pageLimit := 500
+	params := url.Values{}
+	params.Set("app_id", c.cfg.Session.Qobuz.AppID)
+	params.Set("artist_id", artistID)
+	params.Set("limit", strconv.Itoa(pageLimit))
+	params.Set("offset", "0")
+	params.Set("extra", "albums")
+
+	resp, status, err := c.apiRequest(ctx, "artist/get", params, c.authHeaders())
+	if err != nil {
+		return nil, err
+	}
+	if status != http.StatusOK {
+		return nil, fmt.Errorf("artist/get failed: status=%d", status)
+	}
+
+	albumsObj, ok := mapValue(resp["albums"])
+	if !ok {
+		return resp, nil
+	}
+	items, ok := albumsObj["items"].([]any)
+	if !ok {
+		return resp, nil
+	}
+
+	total, _ := intValue(resp["albums_count"])
+	if total <= 0 {
+		total, _ = intValue(albumsObj["total"])
+	}
+	if total <= pageLimit && len(items) < pageLimit {
+		return resp, nil
+	}
+
+	for offset := pageLimit; ; offset += pageLimit {
+		if total > 0 && offset >= total {
+			break
+		}
+		pageParams := url.Values{}
+		pageParams.Set("app_id", c.cfg.Session.Qobuz.AppID)
+		pageParams.Set("artist_id", artistID)
+		pageParams.Set("limit", strconv.Itoa(pageLimit))
+		pageParams.Set("offset", strconv.Itoa(offset))
+		pageParams.Set("extra", "albums")
+
+		pageResp, pageStatus, pageErr := c.apiRequest(ctx, "artist/get", pageParams, c.authHeaders())
+		if pageErr != nil {
+			return nil, pageErr
+		}
+		if pageStatus != http.StatusOK {
+			return nil, fmt.Errorf("artist/get pagination failed: status=%d offset=%d", pageStatus, offset)
+		}
+		pageAlbums, ok := mapValue(pageResp["albums"])
+		if !ok {
+			break
+		}
+		pageItems, ok := pageAlbums["items"].([]any)
+		if !ok || len(pageItems) == 0 {
+			break
+		}
+		items = append(items, pageItems...)
+		if len(pageItems) < pageLimit {
+			break
+		}
+	}
+
+	albumsObj["items"] = items
+	resp["albums"] = albumsObj
+	return resp, nil
+}
+
 func (c *Client) authHeaders() map[string]string {
 	headers := map[string]string{"X-App-Id": c.cfg.Session.Qobuz.AppID}
 	if c.uat != "" {