chore(publicip): refactoring

- Exported `Fetcher` interface
- Inject `Fetcher` to publicip loop and updaters
- Get public IP and information at the same time
- Only query ipinfo.io
- Make `MultiInfo` part of the `Fetch` object

internal/cli/openvpnconfig.go

@@ -11,6 +11,7 @@ import (
 	"github.com/qdm12/gluetun/internal/configuration/sources"
 	"github.com/qdm12/gluetun/internal/constants"
 	"github.com/qdm12/gluetun/internal/provider"
+	publicipmodels "github.com/qdm12/gluetun/internal/publicip/models"
 	"github.com/qdm12/gluetun/internal/storage"
 	"github.com/qdm12/gluetun/internal/updater/resolver"
 )
@@ -30,6 +31,10 @@ type ParallelResolver interface {
 		hostToIPs map[string][]net.IP, warnings []string, err error)
 }
 
+type IPFetcher interface {
+	FetchMultiInfo(ctx context.Context, ips []net.IP) (data []publicipmodels.IPInfoData, err error)
+}
+
 func (c *CLI) OpenvpnConfig(logger OpenvpnConfigLogger, source sources.Source) error {
 	storage, err := storage.New(logger, constants.ServersData)
 	if err != nil {
@@ -50,8 +55,10 @@ func (c *CLI) OpenvpnConfig(logger OpenvpnConfigLogger, source sources.Source) e
 	client := (*http.Client)(nil)
 	warner := (Warner)(nil)
 	parallelResolver := (ParallelResolver)(nil)
+	ipFetcher := (IPFetcher)(nil)
 
-	providers := provider.NewProviders(storage, time.Now, warner, client, unzipper, parallelResolver)
+	providers := provider.NewProviders(storage, time.Now, warner, client,
+		unzipper, parallelResolver, ipFetcher)
 	providerConf := providers.Get(*allSettings.VPN.Provider.Name)
 	connection, err := providerConf.GetConnection(allSettings.VPN.Provider.ServerSelection)
 	if err != nil {