Added Mullvad settings setup

internal/settings/mullvad.go

@@ -0,0 +1,55 @@
+package settings
+
+import (
+	"strings"
+
+	"github.com/qdm12/private-internet-access-docker/internal/models"
+	"github.com/qdm12/private-internet-access-docker/internal/params"
+)
+
+// Mullvad contains the settings to connect to a Mullvad server
+type Mullvad struct {
+	User    string
+	Country models.MullvadCountry
+	City    models.MullvadCity
+	ISP     models.MullvadProvider
+	Port    uint16
+}
+
+func (m *Mullvad) String() string {
+
+	settingsList := []string{
+		"Mullvad settings:",
+		"User: [redacted]",
+		"Country: " + string(m.Country),
+		"City: " + string(m.City),
+		"ISP: " + string(m.ISP),
+		"Port: " + string(m.Port),
+	}
+	return strings.Join(settingsList, "\n |--")
+}
+
+// GetMullvadSettings obtains Mullvad settings from environment variables using the params package.
+func GetMullvadSettings(params params.ParamsReader) (settings Mullvad, err error) {
+	settings.User, err = params.GetUser()
+	if err != nil {
+		return settings, err
+	}
+	settings.Country, err = params.GetMullvadCountry()
+	if err != nil {
+		return settings, err
+	}
+	settings.City, err = params.GetMullvadCity()
+	if err != nil {
+		return settings, err
+	}
+	settings.ISP, err = params.GetMullvadISP()
+	if err != nil {
+		return settings, err
+	}
+	settings.Port, err = params.GetMullvadPort()
+	if err != nil {
+		return settings, err
+	}
+	return settings, nil
+}