chore(updater): move updater packages to pkg/updaters/<name>

pkg/updaters/nordvpn/api.go

@@ -0,0 +1,44 @@
+package nordvpn
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+)
+
+var ErrHTTPStatusCodeNotOK = errors.New("HTTP status code not OK")
+
+func fetchAPI(ctx context.Context, client *http.Client,
+	limit uint,
+) (data serversData, err error) {
+	url := "https://api.nordvpn.com/v2/servers"
+	url += fmt.Sprintf("?limit=%d", limit) // 0 means no limit
+
+	request, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return serversData{}, err
+	}
+
+	response, err := client.Do(request)
+	if err != nil {
+		return serversData{}, err
+	}
+	defer response.Body.Close()
+
+	if response.StatusCode != http.StatusOK {
+		return serversData{}, fmt.Errorf("%w: %s", ErrHTTPStatusCodeNotOK, response.Status)
+	}
+
+	decoder := json.NewDecoder(response.Body)
+	if err := decoder.Decode(&data); err != nil {
+		return serversData{}, fmt.Errorf("decoding response body: %w", err)
+	}
+
+	if err := response.Body.Close(); err != nil {
+		return serversData{}, err
+	}
+
+	return data, nil
+}