model.DateTime

.gitignore

@@ -1 +1,2 @@
-.idea
+.idea
+devops/data

model/datetime.go

@@ -0,0 +1,81 @@
+package model
+
+import (
+	"encoding/json"
+	"io"
+	"log"
+	"regexp"
+	"strconv"
+	"time"
+)
+
+type DateTime int64
+
+var datetimeLayout = "2006-01-02T15:04:05Z0700"
+
+func NewDateTime(milli int64) *DateTime {
+	date := DateTime(milli)
+	return &date
+}
+
+func NewDateTimeIn(seconds int) DateTime {
+	return DateTime(
+		time.Now().In(time.UTC).Add(time.Duration(seconds) * time.Second).UnixMilli())
+}
+
+func NewDateTimeFrom(t time.Time) *DateTime {
+	date := DateTime(t.In(time.UTC).UnixMilli())
+	return &date
+}
+
+func Now() DateTime {
+	return DateTime(time.Now().In(time.UTC).UnixMilli())
+}
+
+func (d DateTime) String() string {
+	return time.UnixMilli(int64(d)).In(time.UTC).Format(datetimeLayout)
+}
+
+func (d DateTime) MarshalJSON() ([]byte, error) {
+	return json.Marshal(time.UnixMilli(int64(d)).In(time.UTC))
+}
+
+func (d DateTime) MarshalGQL(w io.Writer) {
+	_, err := w.Write([]byte(strconv.Quote(d.String())))
+	if err != nil {
+		log.Default().Println(err)
+	}
+}
+
+func (d *DateTime) UnixMilli() int64 {
+	return int64(*d)
+}
+
+func (d *DateTime) UnmarshalGQL(v interface{}) error {
+	switch v := v.(type) {
+	case float64:
+		*d = DateTime(v)
+	case int:
+		*d = DateTime(v)
+	case time.Time:
+		*d = DateTime(v.In(time.UTC).UnixMilli())
+	case string:
+		if regexp.MustCompile(`^\d{13}$`).MatchString(v) {
+			if i, err := strconv.Atoi(v); err == nil {
+				*d = DateTime(i)
+				return nil
+			}
+		}
+
+		t, err := time.Parse(datetimeLayout, v)
+		if err != nil {
+			return err
+		}
+
+		*d = DateTime(t.In(time.UTC).UnixMilli())
+	case DateTime:
+		*d = v
+	}
+
+	return nil
+}