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

internal/provider/protonvpn/updater/servers.go

@@ -0,0 +1,80 @@
+// Package protonvpn contains code to obtain the server information
+// for the ProtonVPN provider.
+package protonvpn
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/http"
+
+	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/models"
+)
+
+var ErrNotEnoughServers = errors.New("not enough servers found")
+
+func GetServers(ctx context.Context, client *http.Client, minServers int) (
+	servers []models.Server, warnings []string, err error) {
+	data, err := fetchAPI(ctx, client)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	countryCodes := constants.CountryCodes()
+
+	var count int
+	for _, logicalServer := range data.LogicalServers {
+		count += len(logicalServer.Servers)
+	}
+
+	if count < minServers {
+		return nil, warnings, fmt.Errorf("%w: %d and expected at least %d",
+			ErrNotEnoughServers, count, minServers)
+	}
+
+	ipToServer := make(ipToServer, count)
+	for _, logicalServer := range data.LogicalServers {
+		region := getStringValue(logicalServer.Region)
+		city := getStringValue(logicalServer.City)
+		name := logicalServer.Name
+		for _, physicalServer := range logicalServer.Servers {
+			if physicalServer.Status == 0 { // disabled so skip server
+				warnings = append(warnings,
+					"ignoring server "+physicalServer.Domain+" with status 0")
+				continue
+			}
+
+			hostname := physicalServer.Domain
+			entryIP := physicalServer.EntryIP
+
+			// Note: for multi-hop use the server name or hostname
+			// instead of the country
+			countryCode := logicalServer.ExitCountry
+			country, warning := codeToCountry(countryCode, countryCodes)
+			if warning != "" {
+				warnings = append(warnings, warning)
+			}
+
+			ipToServer.add(country, region, city, name, hostname, entryIP)
+		}
+	}
+
+	if len(ipToServer) < minServers {
+		return nil, warnings, fmt.Errorf("%w: %d and expected at least %d",
+			ErrNotEnoughServers, len(ipToServer), minServers)
+	}
+
+	servers = ipToServer.toServersSlice()
+
+	sortServers(servers)
+
+	return servers, warnings, nil
+}
+
+func getStringValue(ptr *string) string {
+	if ptr == nil {
+		return ""
+	}
+	return *ptr
+}