feat: add missing endpoitn implementation

client/categories.go

@@ -0,0 +1,45 @@
+package client
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"net/url"
+
+	"github.com/kratisto/tcgdex-golang/models"
+)
+
+// Categories retrieves all categories.
+func (s *tcgDexClient) Categories(ctx context.Context) ([]string, error) {
+	request, err := http.NewRequestWithContext(ctx, http.MethodGet, s.baseURL+"/categories", nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return doRequestSlice[string](s.httpClient, request)
+}
+
+// GetCardsByCategory retrieves all cards for a given category, with optional filters.
+func (s *tcgDexClient) GetCardsByCategory(ctx context.Context, category string, params *FilterParams) ([]models.Card, error) {
+	endpoint := s.baseURL + "/categories/" + category
+	urlParams := url.Values{}
+	if params != nil {
+		if params.Sort != "" {
+			urlParams.Add("sort", params.Sort)
+		}
+		if params.Page > 0 {
+			urlParams.Add("page", fmt.Sprintf("%d", params.Page))
+		}
+		if params.PageSize > 0 {
+			urlParams.Add("pageSize", fmt.Sprintf("%d", params.PageSize))
+		}
+	}
+	if len(urlParams) > 0 {
+		endpoint += "?" + urlParams.Encode()
+	}
+	request, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
+	if err != nil {
+		return nil, err
+	}
+	return doRequestSlice[models.Card](s.httpClient, request)
+}