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golang-package/carbon

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type_timestamp.go 3.26 KB
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package carbon
import (
"bytes"
"database/sql/driver"
"strconv"
)
// timestamp precision constants
const (
PrecisionSecond = "second"
PrecisionMillisecond = "millisecond"
PrecisionMicrosecond = "microsecond"
PrecisionNanosecond = "nanosecond"
)
// TimestampType defines a TimestampType generic struct.
type TimestampType[T TimestampTyper] struct {
*Carbon
}
// NewTimestampType returns a new TimestampType generic instance.
func NewTimestampType[T TimestampTyper](c *Carbon) *TimestampType[T] {
return &TimestampType[T]{
Carbon: c,
}
}
// Scan implements "driver.Scanner" interface for TimestampType generic struct.
func (t *TimestampType[T]) Scan(src any) (err error) {
var c *Carbon
switch v := src.(type) {
case nil:
return nil
case []byte:
c = Parse(string(v))
case string:
c = Parse(v)
case StdTime:
c = CreateFromStdTime(v)
case *StdTime:
c = CreateFromStdTime(*v)
default:
return ErrFailedScan(src)
}
*t = *NewTimestampType[T](c)
return t.Error
}
// Value implements "driver.Valuer" interface for TimestampType generic struct.
func (t TimestampType[T]) Value() (driver.Value, error) {
if t.IsNil() || t.IsZero() || t.IsEmpty() {
return nil, nil
}
if t.HasError() {
return nil, t.Error
}
return t.StdTime(), nil
}
// MarshalJSON implements "json.Marshaler" interface for TimestampType generic struct.
func (t TimestampType[T]) MarshalJSON() ([]byte, error) {
if t.IsNil() || t.IsZero() || t.IsEmpty() {
return []byte(`null`), nil
}
if t.HasError() {
return []byte(`null`), t.Error
}
var ts int64
switch t.getPrecision() {
case PrecisionSecond:
ts = t.Timestamp()
case PrecisionMillisecond:
ts = t.TimestampMilli()
case PrecisionMicrosecond:
ts = t.TimestampMicro()
case PrecisionNanosecond:
ts = t.TimestampNano()
}
return []byte(strconv.FormatInt(ts, 10)), nil
}
// UnmarshalJSON implements "json.Unmarshaler" interface for TimestampType generic struct.
func (t *TimestampType[T]) UnmarshalJSON(src []byte) error {
v := string(bytes.Trim(src, `"`))
if v == "" || v == "null" {
return nil
}
var (
ts int64
err error
)
if ts, err = parseTimestamp(v); err != nil {
return err
}
var c *Carbon
switch t.getPrecision() {
case PrecisionSecond:
c = CreateFromTimestamp(ts, DefaultTimezone)
case PrecisionMillisecond:
c = CreateFromTimestampMilli(ts, DefaultTimezone)
case PrecisionMicrosecond:
c = CreateFromTimestampMicro(ts, DefaultTimezone)
case PrecisionNanosecond:
c = CreateFromTimestampNano(ts, DefaultTimezone)
}
*t = *NewTimestampType[T](c)
return t.Error
}
// String implements "Stringer" interface for TimestampType generic struct.
func (t *TimestampType[T]) String() string {
if t == nil || t.IsInvalid() {
return "0"
}
return strconv.FormatInt(t.Int64(), 10)
}
// Int64 returns the timestamp value.
func (t *TimestampType[T]) Int64() (ts int64) {
if t == nil || t.IsInvalid() || t.IsZero() {
return
}
switch t.getPrecision() {
case PrecisionSecond:
ts = t.Timestamp()
case PrecisionMillisecond:
ts = t.TimestampMilli()
case PrecisionMicrosecond:
ts = t.TimestampMicro()
case PrecisionNanosecond:
ts = t.TimestampNano()
}
return
}
// getPrecision returns precision of TimestampType generic struct.
func (t *TimestampType[T]) getPrecision() string {
var typer T
return typer.Precision()
}
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