Date or Duration diff

pkg/acquisition/modules/loki/timestamp.go

@@ -0,0 +1,25 @@
+package loki
+
+import (
+	"fmt"
+	"time"
+)
+
+type timestamp time.Time
+
+func (t *timestamp) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var tt time.Time
+	err := unmarshal(&tt)
+	if err == nil {
+		*t = timestamp(tt)
+		return nil
+	}
+	var d time.Duration
+	err = unmarshal(&d)
+	if err == nil {
+		*t = timestamp(time.Now().Add(-d))
+		fmt.Println("t", time.Time(*t).Format(time.RFC3339))
+		return nil
+	}
+	return err
+}

pkg/acquisition/modules/loki/timestamp_test.go

@@ -0,0 +1,47 @@
+package loki
+
+import (
+	"testing"
+	"time"
+
+	"gopkg.in/yaml.v2"
+)
+
+func TestTimestampFail(t *testing.T) {
+	var tt timestamp
+	err := yaml.Unmarshal([]byte("plop"), tt)
+	if err == nil {
+		t.Fail()
+	}
+}
+
+func TestTimestampTime(t *testing.T) {
+	var tt timestamp
+	const ts string = "2022-06-14T12:56:39+02:00"
+	err := yaml.Unmarshal([]byte(ts), &tt)
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+	if ts != time.Time(tt).Format(time.RFC3339) {
+		t.Fail()
+	}
+}
+
+func TestTimestampDuration(t *testing.T) {
+	var tt timestamp
+	err := yaml.Unmarshal([]byte("3h"), &tt)
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+	d, err := time.ParseDuration("3h")
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+	z := time.Now().Add(-d)
+	if z.Round(time.Second) != time.Time(tt).Round(time.Second) {
+		t.Fail()
+	}
+}