feat: initial Netts energy orchestrator

internal/config/types.go

@@ -0,0 +1,46 @@
+package config
+
+import (
+	"fmt"
+	"time"
+
+	"gopkg.in/yaml.v3"
+)
+
+// Duration wraps time.Duration to support YAML unmarshalling from strings.
+type Duration time.Duration
+
+// UnmarshalYAML parses a duration string such as "5s" or "2m".
+func (d *Duration) UnmarshalYAML(value *yaml.Node) error {
+	if value.Kind != yaml.ScalarNode {
+		return fmt.Errorf("duration must be a string, got %s", value.ShortTag())
+	}
+	parsed, err := time.ParseDuration(value.Value)
+	if err != nil {
+		return fmt.Errorf("parse duration %q: %w", value.Value, err)
+	}
+	*d = Duration(parsed)
+	return nil
+}
+
+// MarshalYAML converts the duration to a string value.
+func (d Duration) MarshalYAML() (any, error) {
+	return time.Duration(d).String(), nil
+}
+
+// Duration returns the underlying time.Duration.
+func (d Duration) Duration() time.Duration {
+	return time.Duration(d)
+}
+
+// IsZero reports whether the duration has been set.
+func (d Duration) IsZero() bool {
+	return time.Duration(d) == 0
+}
+
+// SetDefault assigns the provided default if the duration is zero.
+func (d *Duration) SetDefault(def time.Duration) {
+	if d.IsZero() {
+		*d = Duration(def)
+	}
+}