Configuration package (#369)

internal/configuration/settings.go

@@ -0,0 +1,93 @@
+package configuration
+
+import (
+	"strings"
+
+	"github.com/qdm12/golibs/logging"
+	"github.com/qdm12/golibs/os"
+	"github.com/qdm12/golibs/params"
+)
+
+// Settings contains all settings for the program to run.
+type Settings struct {
+	OpenVPN            OpenVPN
+	System             System
+	DNS                DNS
+	Firewall           Firewall
+	HTTPProxy          HTTPProxy
+	ShadowSocks        ShadowSocks
+	Updater            Updater
+	PublicIP           PublicIP
+	VersionInformation bool
+	ControlServer      ControlServer
+}
+
+func (settings *Settings) String() string {
+	return strings.Join(settings.lines(), "\n")
+}
+
+func (settings *Settings) lines() (lines []string) {
+	lines = append(lines, "Settings summary below:")
+	lines = append(lines, settings.OpenVPN.lines()...)
+	lines = append(lines, settings.DNS.lines()...)
+	lines = append(lines, settings.Firewall.lines()...)
+	lines = append(lines, settings.System.lines()...)
+	lines = append(lines, settings.HTTPProxy.lines()...)
+	lines = append(lines, settings.ShadowSocks.lines()...)
+	lines = append(lines, settings.ControlServer.lines()...)
+	lines = append(lines, settings.Updater.lines()...)
+	lines = append(lines, settings.PublicIP.lines()...)
+	if settings.VersionInformation {
+		lines = append(lines, lastIndent+"Github version information: enabled")
+	}
+	return lines
+}
+
+// Read obtains all configuration options for the program and returns an error as soon
+// as an error is encountered reading them.
+func (settings *Settings) Read(env params.Env, os os.OS, logger logging.Logger) (err error) {
+	r := newReader(env, os, logger)
+
+	settings.VersionInformation, err = r.env.OnOff("VERSION_INFORMATION", params.Default("on"))
+	if err != nil {
+		return err
+	}
+
+	if err := settings.OpenVPN.read(r); err != nil {
+		return err
+	}
+
+	if err := settings.System.read(r); err != nil {
+		return err
+	}
+
+	if err := settings.DNS.read(r); err != nil {
+		return err
+	}
+
+	if err := settings.Firewall.read(r); err != nil {
+		return err
+	}
+
+	if err := settings.HTTPProxy.read(r); err != nil {
+		return err
+	}
+
+	if err := settings.ShadowSocks.read(r); err != nil {
+		return err
+	}
+
+	if err := settings.ControlServer.read(r); err != nil {
+		return err
+	}
+
+	if err := settings.Updater.read(r); err != nil {
+		return err
+	}
+
+	if err := settings.PublicIP.read(r); err != nil {
+		return err
+	}
+
+	return nil
+}