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

internal/provider/privatevpn/updater/servers.go

@@ -0,0 +1,103 @@
+// Package privatevpn contains code to obtain the server information
+// for the PrivateVPN provider.
+package privatevpn
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/qdm12/gluetun/internal/constants"
+	"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"
+)
+
+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://privatevpn.com/client/PrivateVPN-TUN.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)
+	}
+
+	countryCodes := constants.CountryCodes()
+
+	hts := make(hostToServer)
+	noHostnameServers := make([]models.Server, 0, 1) // there is only one for now
+
+	for fileName, content := range contents {
+		if !strings.HasSuffix(fileName, ".ovpn") {
+			continue // not an OpenVPN file
+		}
+
+		countryCode, city, err := parseFilename(fileName)
+		if err != nil {
+			warnings = append(warnings, err.Error())
+			continue
+		}
+
+		country, warning := codeToCountry(countryCode, countryCodes)
+		if warning != "" {
+			warnings = append(warnings, warning)
+		}
+
+		host, warning, err := openvpn.ExtractHost(content)
+		if warning != "" {
+			warnings = append(warnings, warning)
+		}
+		if err == nil { // found host
+			hts.add(host, country, city)
+			continue
+		}
+
+		ips, extractIPErr := openvpn.ExtractIPs(content)
+		if warning != "" {
+			warnings = append(warnings, warning)
+		}
+		if extractIPErr != nil {
+			// treat extract host error as warning and go to next file
+			warning := err.Error() + " in " + fileName
+			warnings = append(warnings, warning)
+			continue
+		}
+		server := models.Server{
+			Country: country,
+			City:    city,
+			IPs:     ips,
+			UDP:     true,
+			TCP:     true,
+		}
+		noHostnameServers = append(noHostnameServers, server)
+	}
+
+	if len(noHostnameServers)+len(hts) < minServers {
+		return nil, warnings, fmt.Errorf("%w: %d and expected at least %d",
+			ErrNotEnoughServers, len(servers)+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()
+	servers = append(servers, noHostnameServers...)
+
+	sortServers(servers)
+
+	return servers, warnings, nil
+}