[CRE-491] Move Interval type to common types.

pkg/sqlutil/interval.go

@@ -0,0 +1,57 @@
+package sqlutil
+
+import (
+	"database/sql/driver"
+	"fmt"
+	"time"
+)
+
+// Interval represents a time.Duration stored as a Postgres interval type
+type Interval time.Duration
+
+// NewInterval creates Interval for specified duration
+func NewInterval(d time.Duration) *Interval {
+	i := new(Interval)
+	*i = Interval(d)
+	return i
+}
+
+func (i Interval) Duration() time.Duration {
+	return time.Duration(i)
+}
+
+// MarshalText implements the text.Marshaler interface.
+func (i Interval) MarshalText() ([]byte, error) {
+	return []byte(time.Duration(i).String()), nil
+}
+
+// UnmarshalText implements the text.Unmarshaler interface.
+func (i *Interval) UnmarshalText(input []byte) error {
+	v, err := time.ParseDuration(string(input))
+	if err != nil {
+		return err
+	}
+	*i = Interval(v)
+	return nil
+}
+
+func (i *Interval) Scan(v interface{}) error {
+	if v == nil {
+		*i = Interval(time.Duration(0))
+		return nil
+	}
+	asInt64, is := v.(int64)
+	if !is {
+		return fmt.Errorf("models.Interval#Scan() wanted int64, got %T", v)
+	}
+	*i = Interval(time.Duration(asInt64) * time.Nanosecond)
+	return nil
+}
+
+func (i Interval) Value() (driver.Value, error) {
+	return time.Duration(i).Nanoseconds(), nil
+}
+
+func (i Interval) IsZero() bool {
+	return time.Duration(i) == time.Duration(0)
+}

pkg/sqlutil/interval_test.go

@@ -0,0 +1,61 @@
+package sqlutil
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewInterval(t *testing.T) {
+	t.Parallel()
+
+	duration := 33 * time.Second
+	interval := NewInterval(duration)
+
+	require.Equal(t, duration, interval.Duration())
+}
+
+func TestInterval_IsZero(t *testing.T) {
+	t.Parallel()
+
+	i := NewInterval(0)
+	require.NotNil(t, i)
+	require.True(t, i.IsZero())
+
+	i = NewInterval(1)
+	require.NotNil(t, i)
+	require.False(t, i.IsZero())
+}
+
+func TestInterval_Scan_Value(t *testing.T) {
+	t.Parallel()
+
+	i := NewInterval(100)
+	require.NotNil(t, i)
+
+	val, err := i.Value()
+	require.NoError(t, err)
+
+	iNew := NewInterval(0)
+	err = iNew.Scan(val)
+	require.NoError(t, err)
+
+	require.Equal(t, i, iNew)
+}
+
+func TestInterval_MarshalText_UnmarshalText(t *testing.T) {
+	t.Parallel()
+
+	i := NewInterval(100)
+	require.NotNil(t, i)
+
+	txt, err := i.MarshalText()
+	require.NoError(t, err)
+
+	iNew := NewInterval(0)
+	err = iNew.UnmarshalText(txt)
+	require.NoError(t, err)
+
+	require.Equal(t, i, iNew)
+}