chore(all): use casers instead of strings.Title

- Add `golang.org/x/text` dependency
- Update code to use `cases.Title(language.English)`

internal/updater/providers/ipvanish/filename.go

@@ -6,11 +6,12 @@ import (
 	"strings"
 
 	"github.com/qdm12/gluetun/internal/constants"
+	"golang.org/x/text/cases"
 )
 
 var errCountryCodeUnknown = errors.New("country code is unknown")
 
-func parseFilename(fileName, hostname string) (
+func parseFilename(fileName, hostname string, titleCaser cases.Caser) (
 	country, city string, err error) {
 	const prefix = "ipvanish-"
 	s := strings.TrimPrefix(fileName, prefix)
@@ -28,11 +29,11 @@ func parseFilename(fileName, hostname string) (
 	if !ok {
 		return "", "", fmt.Errorf("%w: %s", errCountryCodeUnknown, countryCode)
 	}
-	country = strings.Title(country)
+	country = titleCaser.String(country)
 
 	if len(parts) > 1 {
 		city = strings.Join(parts[1:], " ")
-		city = strings.Title(city)
+		city = titleCaser.String(city)
 	}
 
 	return country, city, nil

internal/updater/providers/ipvanish/filename_test.go

@@ -6,6 +6,8 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
 )
 
 func Test_parseFilename(t *testing.T) {
@@ -39,7 +41,8 @@ func Test_parseFilename(t *testing.T) {
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
 
-			country, city, err := parseFilename(testCase.fileName, testCase.hostname)
+			titleCaser := cases.Title(language.English)
+			country, city, err := parseFilename(testCase.fileName, testCase.hostname, titleCaser)
 
 			if testCase.err != nil {
 				require.Error(t, err)

internal/updater/providers/ipvanish/servers.go

@@ -12,6 +12,8 @@ import (
 	"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")
@@ -30,6 +32,7 @@ func GetServers(ctx context.Context, unzipper unzip.Unzipper,
 
 	hts := make(hostToServer)
 
+	titleCaser := cases.Title(language.English)
 	for fileName, content := range contents {
 		if !strings.HasSuffix(fileName, ".ovpn") {
 			continue // not an OpenVPN file
@@ -54,7 +57,7 @@ func GetServers(ctx context.Context, unzipper unzip.Unzipper,
 			continue
 		}
 
-		country, city, err := parseFilename(fileName, hostname)
+		country, city, err := parseFilename(fileName, hostname, titleCaser)
 		if err != nil {
 			// treat error as warning and go to next file
 			warning := err.Error() + " in " + fileName

internal/updater/providers/torguard/filename.go

@@ -1,8 +1,12 @@
 package torguard
 
-import "strings"
+import (
+	"strings"
 
-func parseFilename(fileName string) (country, city string) {
+	"golang.org/x/text/cases"
+)
+
+func parseFilename(fileName string, titleCaser cases.Caser) (country, city string) {
 	const prefix = "TorGuard."
 	const suffix = ".ovpn"
 	s := strings.TrimPrefix(fileName, prefix)
@@ -20,7 +24,7 @@ func parseFilename(fileName string) (country, city string) {
 		s = strings.ReplaceAll(s, "-", " ")
 		s = strings.ReplaceAll(s, ".", " ")
 		s = strings.ToLower(s)
-		s = strings.Title(s)
+		s = titleCaser.String(s)
 		city = s
 
 	default:

internal/updater/providers/torguard/servers.go

@@ -12,6 +12,8 @@ import (
 	"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")
@@ -32,16 +34,17 @@ func GetServers(ctx context.Context, unzipper unzip.Unzipper,
 	}
 
 	hts := make(hostToServer)
+	titleCaser := cases.Title(language.English)
 
 	for fileName, content := range tcpContents {
 		const tcp, udp = true, false
-		newWarnings := addServerFromOvpn(fileName, content, hts, tcp, udp)
+		newWarnings := addServerFromOvpn(fileName, content, hts, tcp, udp, titleCaser)
 		warnings = append(warnings, newWarnings...)
 	}
 
 	for fileName, content := range udpContents {
 		const tcp, udp = false, true
-		newWarnings := addServerFromOvpn(fileName, content, hts, tcp, udp)
+		newWarnings := addServerFromOvpn(fileName, content, hts, tcp, udp, titleCaser)
 		warnings = append(warnings, newWarnings...)
 	}
 
@@ -72,12 +75,12 @@ func GetServers(ctx context.Context, unzipper unzip.Unzipper,
 }
 
 func addServerFromOvpn(fileName string, content []byte,
-	hts hostToServer, tcp, udp bool) (warnings []string) {
+	hts hostToServer, tcp, udp bool, titleCaser cases.Caser) (warnings []string) {
 	if !strings.HasSuffix(fileName, ".ovpn") {
 		return nil // not an OpenVPN file
 	}
 
-	country, city := parseFilename(fileName)
+	country, city := parseFilename(fileName, titleCaser)
 
 	host, warning, err := openvpn.ExtractHost(content)
 	if warning != "" {

internal/updater/updater.go

@@ -4,13 +4,14 @@ package updater
 import (
 	"context"
 	"net/http"
-	"strings"
 	"time"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/updater/resolver"
 	"github.com/qdm12/gluetun/internal/updater/unzip"
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
 )
 
 type Updater interface {
@@ -46,9 +47,11 @@ func New(settings settings.Updater, httpClient *http.Client,
 	}
 }
 
+var caser = cases.Title(language.English) //nolint:gochecknoglobals
+
 func (u *updater) UpdateServers(ctx context.Context) (allServers models.AllServers, err error) {
 	for _, provider := range u.options.Providers {
-		u.logger.Info("updating " + strings.Title(provider) + " servers...")
+		u.logger.Info("updating " + caser.String(provider) + " servers...")
 		// TODO support servers offering only TCP or only UDP
 		// for NordVPN and PureVPN
 		warnings, err := u.updateProvider(ctx, provider)