feat(providers): add giganews support (#2479)

internal/provider/giganews/updater/servers.go

@@ -0,0 +1,87 @@
+package updater
+
+import (
+	"context"
+	"fmt"
+	"sort"
+	"strings"
+
+	"github.com/qdm12/gluetun/internal/models"
+	"github.com/qdm12/gluetun/internal/provider/common"
+	"github.com/qdm12/gluetun/internal/updater/openvpn"
+)
+
+func (u *Updater) FetchServers(ctx context.Context, minServers int) (
+	servers []models.Server, err error) {
+	const url = "https://support.vyprvpn.com/hc/article_attachments/360052617332/Vypr_OpenVPN_20200320.zip"
+	contents, err := u.unzipper.FetchAndExtract(ctx, url)
+	if err != nil {
+		return nil, err
+	} else if len(contents) < minServers {
+		return nil, fmt.Errorf("%w: %d and expected at least %d",
+			common.ErrNotEnoughServers, len(contents), minServers)
+	}
+
+	hts := make(hostToServer)
+
+	for fileName, content := range contents {
+		if !strings.HasSuffix(fileName, ".ovpn") {
+			continue // not an OpenVPN file
+		}
+
+		host, warning, err := openvpn.ExtractHost(content)
+		if warning != "" {
+			u.warner.Warn(warning)
+		}
+		if err != nil {
+			// treat error as warning and go to next file
+			u.warner.Warn(err.Error() + " in " + fileName)
+			continue
+		}
+		host = strings.ReplaceAll(host, "vyprvpn.com", "vpn.giganews.com")
+
+		tcp, udp, err := openvpn.ExtractProto(content)
+		if err != nil {
+			// treat error as warning and go to next file
+			u.warner.Warn(err.Error() + " in " + fileName)
+			continue
+		}
+
+		region, err := parseFilename(fileName)
+		if err != nil {
+			// treat error as warning and go to next file
+			u.warner.Warn(err.Error())
+			continue
+		}
+
+		hts.add(host, region, tcp, udp)
+	}
+
+	if len(hts) < minServers {
+		return nil, fmt.Errorf("%w: %d and expected at least %d",
+			common.ErrNotEnoughServers, len(hts), minServers)
+	}
+
+	hosts := hts.toHostsSlice()
+	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
+	}
+
+	if len(hostToIPs) < minServers {
+		return nil, fmt.Errorf("%w: %d and expected at least %d",
+			common.ErrNotEnoughServers, len(servers), minServers)
+	}
+
+	hts.adaptWithIPs(hostToIPs)
+
+	servers = hts.toServersSlice()
+
+	sort.Sort(models.SortableServers(servers))
+
+	return servers, nil
+}