feat(vpn): rotate filtered servers on internal vpn restarts

- Fix #290

internal/provider/purevpn/connection.go

@@ -11,5 +11,5 @@ func (p *Provider) GetConnection(selection settings.ServerSelection, ipv6Support
 ) {
 	defaults := utils.NewConnectionDefaults(80, 53, 0) //nolint:mnd
 	return utils.GetConnection(p.Name(),
-		p.storage, selection, defaults, ipv6Supported, p.randSource)
+		p.storage, selection, defaults, ipv6Supported, p.connPicker)
 }

internal/provider/purevpn/provider.go

@@ -1,26 +1,24 @@
 package purevpn
 
 import (
-	"math/rand"
-
 	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/provider/common"
 	"github.com/qdm12/gluetun/internal/provider/purevpn/updater"
+	"github.com/qdm12/gluetun/internal/provider/utils"
 )
 
 type Provider struct {
 	storage    common.Storage
-	randSource rand.Source
+	connPicker *utils.ConnectionPicker
 	common.Fetcher
 }
 
-func New(storage common.Storage, randSource rand.Source,
-	ipFetcher common.IPFetcher, unzipper common.Unzipper,
+func New(storage common.Storage, ipFetcher common.IPFetcher, unzipper common.Unzipper,
 	updaterWarner common.Warner, parallelResolver common.ParallelResolver,
 ) *Provider {
 	return &Provider{
 		storage:    storage,
-		randSource: randSource,
+		connPicker: utils.NewConnectionPicker(),
 		Fetcher:    updater.New(ipFetcher, unzipper, updaterWarner, parallelResolver),
 	}
 }