feat: initial release

internal/config/node.go

@@ -0,0 +1,85 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+type LogLevel string
+
+const (
+	LogLevelDebug LogLevel = "DEBUG"
+	LogLevelInfo  LogLevel = "INFO"
+	LogLevelWarn  LogLevel = "WARN"
+	LogLevelError LogLevel = "ERROR"
+)
+
+func (l *LogLevel) UnmarshalText(data []byte) error {
+	raw := strings.ToUpper(string(data))
+
+	switch LogLevel(raw) {
+	case LogLevelDebug, LogLevelInfo, LogLevelWarn, LogLevelError:
+		*l = LogLevel(raw)
+		return nil
+	default:
+		return fmt.Errorf("invalid log level: %q", data)
+	}
+}
+
+type NodeConfig struct {
+	Hostname          string   `toml:"hostname"`
+	Endpoint          string   `toml:"endpoint"`
+	KeepaliveInterval int      `toml:"keepalive_interval"`
+	LogLevel          LogLevel `toml:"log_level"`
+
+	BootstrapMaster string `toml:"bootstrap_master"`
+	ListenOn        string `toml:"listen_on"`
+	Port            int    `toml:"port"`
+}
+
+func (c NodeConfig) Validate() error {
+	if c.Hostname == "" {
+		return errors.New("missing hostname")
+	}
+
+	if c.Endpoint == "" {
+		return errors.New("missing endpoint")
+	}
+
+	if c.KeepaliveInterval < 1 && c.KeepaliveInterval != -1 {
+		return errors.New("invalid keepalive_interval")
+	}
+
+	return nil
+}
+
+func (c *NodeConfig) Merge(other NodeConfig) {
+	if other.Hostname != "" {
+		c.Hostname = other.Hostname
+	}
+
+	if other.Endpoint != "" {
+		c.Endpoint = other.Endpoint
+	}
+
+	if other.BootstrapMaster != "" {
+		c.BootstrapMaster = other.BootstrapMaster
+	}
+
+	if other.ListenOn != "" {
+		c.ListenOn = other.ListenOn
+	}
+
+	if other.Port != 0 {
+		c.Port = other.Port
+	}
+
+	if other.KeepaliveInterval != 0 {
+		c.KeepaliveInterval = other.KeepaliveInterval
+	}
+
+	if other.LogLevel != "" {
+		c.LogLevel = other.LogLevel
+	}
+}