/
codec.go
61 lines (53 loc) · 1.61 KB
/
codec.go
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package store
import (
"fmt"
"reflect"
"time"
"github.com/pkg/errors"
"go.mongodb.org/mongo-driver/bson/bsoncodec"
"go.mongodb.org/mongo-driver/bson/bsonrw"
"go.mongodb.org/mongo-driver/bson/bsontype"
)
var (
TDateTime = reflect.TypeOf(DateTime(""))
)
type DateTimeCodec struct{}
func (d *DateTimeCodec) EncodeValue(_ bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
if !val.IsValid() || val.Type() != TDateTime {
return bsoncodec.ValueEncoderError{Name: "DateTimeEncodeValue", Types: []reflect.Type{TDateTime}, Received: val}
}
td, ok := val.Interface().(DateTime)
if !ok {
return errors.New("failed to encode date time")
}
tt, err := td.Time()
if err != nil {
return bsoncodec.ValueEncoderError{Name: "DateTimeEncodeValue", Types: []reflect.Type{TDateTime}, Received: val}
}
return vw.WriteDateTime(tt.UnixMilli())
}
func (d *DateTimeCodec) DecodeValue(_ bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
if !val.CanSet() || val.Type() != TDateTime {
return bsoncodec.ValueDecoderError{Name: "DecimalDecodeValue", Types: []reflect.Type{TDateTime}, Received: val}
}
var dateTimeVal DateTime
//nolint:exhaustive
switch t := vr.Type(); t {
case bsontype.DateTime:
dt, err := vr.ReadDateTime()
if err != nil {
return err
}
dateTimeVal = NewDateTime(time.UnixMilli(dt))
case bsontype.String:
decimalStr, err := vr.ReadString()
if err != nil {
return err
}
dateTimeVal = DateTime(decimalStr)
default:
return fmt.Errorf("cannot decode %v into a DateTime", t) //nolint:goerr113
}
val.Set(reflect.ValueOf(dateTimeVal))
return nil
}