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

pkg/updaters/expressvpn/servers.go

@@ -0,0 +1,54 @@
+package expressvpn
+
+import (
+	"context"
+	"fmt"
+	"sort"
+
+	"github.com/qdm12/gluetun/internal/constants/vpn"
+	"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,
+) {
+	servers = hardcodedServers()
+
+	hosts := make([]string, len(servers))
+	for i := range servers {
+		hosts[i] = servers[i].Hostname
+	}
+
+	resolveSettings := parallelResolverSettings(hosts)
+	hostToIPs, warnings, err := u.parallelResolver.Resolve(ctx, resolveSettings)
+	for _, warning := range warnings {
+		u.warner.Warn(warning)
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	i := 0
+	for _, server := range servers {
+		hostname := server.Hostname
+		server.IPs = hostToIPs[hostname]
+		if len(server.IPs) == 0 {
+			continue
+		}
+		server.VPN = vpn.OpenVPN
+		server.UDP = true // no TCP support
+		servers[i] = server
+		i++
+	}
+	servers = servers[:i]
+
+	if len(servers) < minServers {
+		return nil, fmt.Errorf("%w: %d and expected at least %d",
+			common.ErrNotEnoughServers, len(servers), minServers)
+	}
+
+	sort.Sort(models.SortableServers(servers))
+
+	return servers, nil
+}