chore(all): move sub-packages to internal/provider

internal/provider/ipvanish/updater/servers.go

@@ -0,0 +1,95 @@
+// Package ipvanish contains code to obtain the server information
+// for the Surshark provider.
+package ipvanish
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/qdm12/gluetun/internal/models"
+	"github.com/qdm12/gluetun/internal/updater/openvpn"
+	"github.com/qdm12/gluetun/internal/updater/resolver"
+	"github.com/qdm12/gluetun/internal/updater/unzip"
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
+)
+
+var ErrNotEnoughServers = errors.New("not enough servers found")
+
+func GetServers(ctx context.Context, unzipper unzip.Unzipper,
+	presolver resolver.Parallel, minServers int) (
+	servers []models.Server, warnings []string, err error) {
+	const url = "https://www.ipvanish.com/software/configs/configs.zip"
+	contents, err := unzipper.FetchAndExtract(ctx, url)
+	if err != nil {
+		return nil, nil, err
+	} else if len(contents) < minServers {
+		return nil, nil, fmt.Errorf("%w: %d and expected at least %d",
+			ErrNotEnoughServers, len(contents), minServers)
+	}
+
+	hts := make(hostToServer)
+
+	titleCaser := cases.Title(language.English)
+	for fileName, content := range contents {
+		if !strings.HasSuffix(fileName, ".ovpn") {
+			continue // not an OpenVPN file
+		}
+
+		tcp, udp, err := openvpn.ExtractProto(content)
+		if err != nil {
+			// treat error as warning and go to next file
+			warning := err.Error() + ": in " + fileName
+			warnings = append(warnings, warning)
+			continue
+		}
+
+		hostname, warning, err := openvpn.ExtractHost(content)
+		if warning != "" {
+			warnings = append(warnings, warning)
+		}
+		if err != nil {
+			// treat error as warning and go to next file
+			warning := err.Error() + " in " + fileName
+			warnings = append(warnings, warning)
+			continue
+		}
+
+		country, city, err := parseFilename(fileName, hostname, titleCaser)
+		if err != nil {
+			// treat error as warning and go to next file
+			warning := err.Error() + " in " + fileName
+			warnings = append(warnings, warning)
+			continue
+		}
+
+		hts.add(hostname, country, city, tcp, udp)
+	}
+
+	if len(hts) < minServers {
+		return nil, warnings, fmt.Errorf("%w: %d and expected at least %d",
+			ErrNotEnoughServers, len(hts), minServers)
+	}
+
+	hosts := hts.toHostsSlice()
+	hostToIPs, newWarnings, err := resolveHosts(ctx, presolver, hosts, minServers)
+	warnings = append(warnings, newWarnings...)
+	if err != nil {
+		return nil, warnings, err
+	}
+
+	hts.adaptWithIPs(hostToIPs)
+
+	servers = hts.toServersSlice()
+
+	if len(servers) < minServers {
+		return nil, warnings, fmt.Errorf("%w: %d and expected at least %d",
+			ErrNotEnoughServers, len(servers), minServers)
+	}
+
+	sortServers(servers)
+
+	return servers, warnings, nil
+}