Added Mullvad environment variables and getters

internal/params/mullvad.go

@@ -0,0 +1,40 @@
+package params
+
+import (
+	"strings"
+
+	libparams "github.com/qdm12/golibs/params"
+	"github.com/qdm12/private-internet-access-docker/internal/constants"
+	"github.com/qdm12/private-internet-access-docker/internal/models"
+)
+
+// GetMullvadCountry obtains the country for the Mullvad server from the
+// environment variable COUNTRY
+func (p *paramsReader) GetMullvadCountry() (country models.MullvadCountry, err error) {
+	choices := append(constants.MullvadCityChoices(), "")
+	s, err := p.envParams.GetValueIfInside("COUNTRY", choices)
+	return models.MullvadCountry(strings.ToLower(s)), err
+}
+
+// GetMullvadCity obtains the city for the Mullvad server from the
+// environment variable CITY
+func (p *paramsReader) GetMullvadCity() (country models.MullvadCity, err error) {
+	choices := append(constants.MullvadCityChoices(), "")
+	s, err := p.envParams.GetValueIfInside("CITY", choices)
+	return models.MullvadCity(strings.ToLower(s)), err
+}
+
+// GetMullvadISP obtains the ISP for the Mullvad server from the
+// environment variable ISP
+func (p *paramsReader) GetMullvadISP() (country models.MullvadProvider, err error) {
+	choices := append(constants.MullvadProviderChoices(), "")
+	s, err := p.envParams.GetValueIfInside("ISP", choices)
+	return models.MullvadProvider(strings.ToLower(s)), err
+}
+
+// GetMullvadPort obtains the port to reach the Mullvad server on from the
+// environment variable PORT
+func (p *paramsReader) GetMullvadPort() (port uint16, err error) {
+	n, err := p.envParams.GetEnvIntRange("PORT", 0, 65535, libparams.Default("0"))
+	return uint16(n), err
+}