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arikawa/utils/json/raw.go

59 lines
1.1 KiB
Go

package json
import (
"bytes"
"strconv"
)
type Marshaler interface {
MarshalJSON() ([]byte, error)
}
type Unmarshaler interface {
UnmarshalJSON([]byte) error
}
// Raw is a raw encoded JSON value. It implements Marshaler and Unmarshaler and
// can be used to delay JSON decoding or precompute a JSON encoding. It's taken
// from encoding/json.
type Raw []byte
// Raw returns m as the JSON encoding of m.
func (m Raw) MarshalJSON() ([]byte, error) {
if m == nil {
return []byte("null"), nil
}
return m, nil
}
func (m *Raw) UnmarshalJSON(data []byte) error {
*m = append((*m)[0:0], data...)
return nil
}
func (m Raw) UnmarshalTo(v interface{}) error {
// Leave as nil.
if len(m) == 0 {
return nil
}
return Unmarshal(m, v)
}
func (m Raw) String() string {
return string(m)
}
// AlwaysString would always unmarshal into a string, from any JSON type. Quotes
// will be stripped.
type AlwaysString string
func (m *AlwaysString) UnmarshalJSON(data []byte) error {
data = bytes.Trim(data, `"`)
*m = AlwaysString(data)
return nil
}
func (m AlwaysString) Int() (int, error) {
return strconv.Atoi(string(m))
}