go-jsonint/int.go

60 lines
1.0 KiB
Go

package jsonint
import (
"encoding/json"
"strconv"
"sourcecode.social/reiver/go-erorr"
"sourcecode.social/reiver/go-opt"
)
var _ json.Marshaler = Int{}
var _ json.Unmarshaler = new(Int)
type Int struct {
value opt.Optional[string]
}
func Nothing() Int {
return Int{}
}
func Int64(value int64) Int {
return Int{
value: opt.Something(strconv.FormatInt(value, 10)),
}
}
func Uint64(value uint64) Int {
return Int{
value: opt.Something(strconv.FormatUint(value, 10)),
}
}
func (receiver Int) Get() (string, bool) {
return receiver.value.Get()
}
func (receiver Int) MarshalJSON() ([]byte, error) {
value, found := receiver.value.Get()
if !found {
return nil, errCannotMarshalNothingIntoJSON
}
return []byte(value), nil
}
func (receiver *Int) UnmarshalJSON(data []byte) error {
if nil == receiver {
return errNilReceiver
}
if !isNumeric(data) {
return erorr.Errorf("jsonint: cannot unmarshal %q into value of type %T", data, Int{})
}
receiver.value = opt.Something(string(data))
return nil
}