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/provider/purevpn/provider.go

@@ -2,7 +2,6 @@ package purevpn
 
 import (
 	"math/rand"
-	"net/http"
 
 	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/provider/common"
@@ -18,13 +17,13 @@ type Provider struct {
 }
 
 func New(storage common.Storage, randSource rand.Source,
-	client *http.Client, unzipper common.Unzipper, updaterWarner common.Warner,
-	parallelResolver common.ParallelResolver) *Provider {
+	ipFetcher common.IPFetcher, unzipper common.Unzipper,
+	updaterWarner common.Warner, parallelResolver common.ParallelResolver) *Provider {
 	return &Provider{
 		storage:         storage,
 		randSource:      randSource,
 		NoPortForwarder: utils.NewNoPortForwarding(providers.Purevpn),
-		Fetcher:         updater.New(client, unzipper, updaterWarner, parallelResolver),
+		Fetcher:         updater.New(ipFetcher, unzipper, updaterWarner, parallelResolver),
 	}
 }
 

internal/provider/purevpn/updater/servers.go

@@ -11,7 +11,6 @@ import (
 
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/common"
-	"github.com/qdm12/gluetun/internal/publicip"
 	"github.com/qdm12/gluetun/internal/updater/openvpn"
 )
 
@@ -83,7 +82,7 @@ func (u *Updater) FetchServers(ctx context.Context, minServers int) (
 	for i := range servers {
 		ipsToGetInfo[i] = servers[i].IPs[0]
 	}
-	ipsInfo, err := publicip.MultiInfo(ctx, u.client, ipsToGetInfo)
+	ipsInfo, err := u.ipFetcher.FetchMultiInfo(ctx, ipsToGetInfo)
 	if err != nil {
 		return nil, err
 	}

internal/provider/purevpn/updater/updater.go

@@ -1,22 +1,20 @@
 package updater
 
 import (
-	"net/http"
-
 	"github.com/qdm12/gluetun/internal/provider/common"
 )
 
 type Updater struct {
-	client           *http.Client
+	ipFetcher        common.IPFetcher
 	unzipper         common.Unzipper
 	parallelResolver common.ParallelResolver
 	warner           common.Warner
 }
 
-func New(client *http.Client, unzipper common.Unzipper,
+func New(ipFetcher common.IPFetcher, unzipper common.Unzipper,
 	warner common.Warner, parallelResolver common.ParallelResolver) *Updater {
 	return &Updater{
-		client:           client,
+		ipFetcher:        ipFetcher,
 		unzipper:         unzipper,
 		parallelResolver: parallelResolver,
 		warner:           warner,