goext/rfctime/date.go

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package rfctime
import (
"encoding/json"
"errors"
"fmt"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/bsoncodec"
"go.mongodb.org/mongo-driver/bson/bsonrw"
"go.mongodb.org/mongo-driver/bson/bsontype"
"reflect"
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"strconv"
"strings"
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"time"
)
type Date struct {
Year int
Month int
Day int
}
func (t Date) Time(loc *time.Location) time.Time {
return time.Date(t.Year, time.Month(t.Month), t.Day, 0, 0, 0, 0, loc)
}
func (t Date) TimeUTC() time.Time {
return time.Date(t.Year, time.Month(t.Month), t.Day, 0, 0, 0, 0, time.UTC)
}
func (t Date) TimeLocal() time.Time {
return time.Date(t.Year, time.Month(t.Month), t.Day, 0, 0, 0, 0, time.Local)
}
func (t Date) MarshalBinary() ([]byte, error) {
return t.TimeUTC().MarshalBinary()
}
func (t *Date) UnmarshalBinary(data []byte) error {
nt := time.Time{}
if err := nt.UnmarshalBinary(data); err != nil {
return err
}
t.Year = nt.Year()
t.Month = int(nt.Month())
t.Day = nt.Day()
return nil
}
func (t Date) GobEncode() ([]byte, error) {
return t.TimeUTC().GobEncode()
}
func (t *Date) GobDecode(data []byte) error {
nt := time.Time{}
if err := nt.GobDecode(data); err != nil {
return err
}
t.Year = nt.Year()
t.Month = int(nt.Month())
t.Day = nt.Day()
return nil
}
func (t *Date) UnmarshalJSON(data []byte) error {
str := ""
if err := json.Unmarshal(data, &str); err != nil {
return err
}
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return t.ParseString(str)
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}
func (t Date) MarshalJSON() ([]byte, error) {
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str := t.String()
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return json.Marshal(str)
}
func (t Date) MarshalText() ([]byte, error) {
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return []byte(t.String()), nil
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}
func (t *Date) UnmarshalText(data []byte) error {
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return t.ParseString(string(data))
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}
func (t *Date) UnmarshalBSONValue(bt bsontype.Type, data []byte) error {
if bt == bsontype.Null {
// we can't set nil in UnmarshalBSONValue (so we use default(struct))
// Use mongoext.CreateGoExtBsonRegistry if you need to unmarsh pointer values
// https://stackoverflow.com/questions/75167597
// https://jira.mongodb.org/browse/GODRIVER-2252
*t = Date{}
return nil
}
if bt != bsontype.String {
return errors.New(fmt.Sprintf("cannot unmarshal %v into Date", bt))
}
var tt string
err := bson.RawValue{Type: bt, Value: data}.Unmarshal(&tt)
if err != nil {
return err
}
if tt == "" {
t.Year = 0
t.Month = 0
t.Day = 0
return nil
}
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v, err := time.Parse(t.FormatStr(), tt)
if err != nil {
return err
}
t.Year = v.Year()
t.Month = int(v.Month())
t.Day = v.Day()
return nil
}
func (t Date) MarshalBSONValue() (bsontype.Type, []byte, error) {
if t.IsZero() {
return bson.MarshalValue("")
}
return bson.MarshalValue(t.String())
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}
func (t Date) DecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
if val.Kind() == reflect.Ptr && val.IsNil() {
if !val.CanSet() {
return errors.New("ValueUnmarshalerDecodeValue")
}
val.Set(reflect.New(val.Type().Elem()))
}
tp, src, err := bsonrw.Copier{}.CopyValueToBytes(vr)
if err != nil {
return err
}
if val.Kind() == reflect.Ptr && len(src) == 0 {
val.Set(reflect.Zero(val.Type()))
return nil
}
err = t.UnmarshalBSONValue(tp, src)
if err != nil {
return err
}
if val.Kind() == reflect.Ptr {
val.Set(reflect.ValueOf(&t))
} else {
val.Set(reflect.ValueOf(t))
}
return nil
}
func (t Date) Serialize() string {
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return t.String()
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}
func (t Date) FormatStr() string {
return "2006-01-02"
}
func (t Date) Date() (year int, month time.Month, day int) {
return t.TimeUTC().Date()
}
func (t Date) Weekday() time.Weekday {
return t.TimeUTC().Weekday()
}
func (t Date) ISOWeek() (year, week int) {
return t.TimeUTC().ISOWeek()
}
func (t Date) YearDay() int {
return t.TimeUTC().YearDay()
}
func (t Date) AddDate(years int, months int, days int) Date {
return NewDate(t.TimeUTC().AddDate(years, months, days))
}
func (t Date) Unix() int64 {
return t.TimeUTC().Unix()
}
func (t Date) UnixMilli() int64 {
return t.TimeUTC().UnixMilli()
}
func (t Date) UnixMicro() int64 {
return t.TimeUTC().UnixMicro()
}
func (t Date) UnixNano() int64 {
return t.TimeUTC().UnixNano()
}
func (t Date) Format(layout string) string {
return t.TimeUTC().Format(layout)
}
func (t Date) GoString() string {
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return fmt.Sprintf("rfctime.Date{Year: %d, Month: %d, Day: %d}", t.Year, t.Month, t.Day)
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}
func (t Date) String() string {
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return fmt.Sprintf("%04d-%02d-%02d", t.Year, t.Month, t.Day)
}
func (t *Date) ParseString(v string) error {
split := strings.Split(v, "-")
if len(split) != 3 {
return errors.New("invalid date format: " + v)
}
year, err := strconv.ParseInt(split[0], 10, 32)
if err != nil {
return errors.New("invalid date format: " + v + ": " + err.Error())
}
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month, err := strconv.ParseInt(split[1], 10, 32)
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if err != nil {
return errors.New("invalid date format: " + v + ": " + err.Error())
}
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day, err := strconv.ParseInt(split[2], 10, 32)
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if err != nil {
return errors.New("invalid date format: " + v + ": " + err.Error())
}
if year < 0 {
return errors.New("invalid date format: " + v + ": year is negative")
}
if month < 1 || month > 12 {
return errors.New("invalid date format: " + v + ": month is out of range")
}
if day < 1 || day > 31 {
return errors.New("invalid date format: " + v + ": day is out of range")
}
t.Year = int(year)
t.Month = int(month)
t.Day = int(day)
return nil
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}
func (t Date) IsZero() bool {
return t.Year == 0 && t.Month == 0 && t.Day == 0
}
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func NewDate(t time.Time) Date {
return Date{
Year: t.Year(),
Month: int(t.Month()),
Day: t.Day(),
}
}
func NowDate(loc *time.Location) Date {
return NewDate(time.Now().In(loc))
}
func NowDateLoc() Date {
return NewDate(time.Now().In(time.UTC))
}
func NowDateUTC() Date {
return NewDate(time.Now().In(time.Local))
}