Config UI: add missing config sections / partial yaml inputs (BC) (#13319)

util/encode/encode.go

@@ -0,0 +1,67 @@
+package encode
+
+import (
+	"fmt"
+	"math"
+	"time"
+)
+
+type encoder struct {
+	withDuration bool
+}
+
+type Encoder interface {
+	Encode(v any) any
+}
+
+type EncoderOption func(*encoder)
+
+// NewEncoder creates a new encoder with the following default conversions:
+// - float NaN/Inf are converted to nil
+// - zero time.Time are converted to nil
+// - durations are converted to seconds using WithDuration()
+// - fmt.Stringer are converted to string
+// - time.Time are converted to RFC3339 string
+func NewEncoder(opt ...EncoderOption) Encoder {
+	res := new(encoder)
+	for _, o := range opt {
+		o(res)
+	}
+	return res
+}
+
+func WithDuration() EncoderOption {
+	return func(e *encoder) {
+		e.withDuration = true
+	}
+}
+
+// Encode provides a consumer-friendly default encoding for any type
+func (e encoder) Encode(v any) any {
+	switch val := v.(type) {
+	case time.Time:
+		if val.IsZero() {
+			return nil
+		}
+		return val.Format(time.RFC3339)
+
+	case time.Duration:
+		// must be before stringer to convert to seconds instead of string
+		if e.withDuration {
+			return int(val.Seconds())
+		}
+		return val
+
+	case float64:
+		if math.IsNaN(val) || math.IsInf(val, 0) {
+			return nil
+		}
+		return math.Round(val*1e3) / 1e3
+
+	case fmt.Stringer:
+		return val.String()
+
+	default:
+		return val
+	}
+}

util/encode/encode_test.go

@@ -0,0 +1,18 @@
+package encode
+
+import (
+	"math"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestEncode(t *testing.T) {
+	enc := NewEncoder(WithDuration())
+	assert.Equal(t, nil, enc.Encode(time.Time{}))
+	assert.Equal(t, nil, enc.Encode(math.NaN()))
+	assert.Equal(t, nil, enc.Encode(math.Inf(0)))
+	assert.Equal(t, 30, enc.Encode(30*time.Second))
+	assert.Equal(t, 3.142, enc.Encode(math.Pi))
+}