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

pkg/updaters/mullvad/servers.go

@@ -0,0 +1,37 @@
+package mullvad
+
+import (
+	"context"
+	"fmt"
+	"sort"
+
+	"github.com/qdm12/gluetun/internal/models"
+	"github.com/qdm12/gluetun/internal/provider/common"
+)
+
+func (u *Updater) FetchServers(ctx context.Context, minServers int) (
+	servers []models.Server, err error,
+) {
+	data, err := fetchAPI(ctx, u.client)
+	if err != nil {
+		return nil, err
+	}
+
+	hts := make(hostToServer)
+	for _, serverData := range data {
+		if err := hts.add(serverData); err != nil {
+			return nil, err
+		}
+	}
+
+	if len(hts) < minServers {
+		return nil, fmt.Errorf("%w: %d and expected at least %d",
+			common.ErrNotEnoughServers, len(hts), minServers)
+	}
+
+	servers = hts.toServersSlice()
+
+	sort.Sort(models.SortableServers(servers))
+
+	return servers, nil
+}