paginate tidal artist album fetches across all pages

internal/provider/tidal/client.go

@@ -310,31 +310,49 @@ func (c *Client) fetchArtistAlbums(ctx context.Context, artistID string) ([]map[
 	out := make([]map[string]any, 0)
 	seen := map[string]struct{}{}
 	for _, p := range paths {
-		resp, status, err := c.apiRequest(ctx, p.path, p.params, c.baseURL)
-		if err != nil {
-			return nil, err
-		}
-		if status != http.StatusOK {
-			return nil, fmt.Errorf("tidal artist albums failed: status=%d", status)
-		}
-		items, _ := resp["items"].([]any)
-		for _, raw := range items {
-			itm, ok := raw.(map[string]any)
-			if !ok {
-				continue
+		offset := 0
+		for {
+			params := url.Values{}
+			for k, values := range p.params {
+				for _, v := range values {
+					params.Add(k, v)
+				}
 			}
-			if wrapped, ok := itm["item"].(map[string]any); ok {
-				itm = wrapped
+			params.Set("offset", strconv.Itoa(offset))
+
+			resp, status, err := c.apiRequest(ctx, p.path, params, c.baseURL)
+			if err != nil {
+				return nil, err
 			}
-			id := stringify(itm["id"])
-			if id == "" {
-				continue
+			if status != http.StatusOK {
+				return nil, fmt.Errorf("tidal artist albums failed: status=%d offset=%d", status, offset)
 			}
-			if _, dup := seen[id]; dup {
-				continue
+			items, _ := resp["items"].([]any)
+			if len(items) == 0 {
+				break
 			}
-			seen[id] = struct{}{}
-			out = append(out, itm)
+			for _, raw := range items {
+				itm, ok := raw.(map[string]any)
+				if !ok {
+					continue
+				}
+				if wrapped, ok := itm["item"].(map[string]any); ok {
+					itm = wrapped
+				}
+				id := stringify(itm["id"])
+				if id == "" {
+					continue
+				}
+				if _, dup := seen[id]; dup {
+					continue
+				}
+				seen[id] = struct{}{}
+				out = append(out, itm)
+			}
+			if len(items) < 100 {
+				break
+			}
+			offset += 100
 		}
 	}
 	return out, nil