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

internal/provider/surfshark/updater/location.go

@@ -0,0 +1,31 @@
+package surfshark
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/qdm12/gluetun/internal/provider/surfshark/servers"
+)
+
+var (
+	errHostnameNotFound = errors.New("hostname not found in hostname to location mapping")
+)
+
+func getHostInformation(host string, hostnameToLocation map[string]servers.ServerLocation) (
+	data servers.ServerLocation, err error) {
+	locationData, ok := hostnameToLocation[host]
+	if !ok {
+		return locationData, fmt.Errorf("%w: %s", errHostnameNotFound, host)
+	}
+
+	return locationData, nil
+}
+
+func hostToLocation(locationData []servers.ServerLocation) (
+	hostToLocation map[string]servers.ServerLocation) {
+	hostToLocation = make(map[string]servers.ServerLocation, len(locationData))
+	for _, data := range locationData {
+		hostToLocation[data.Hostname] = data
+	}
+	return hostToLocation
+}