131 lines
2.4 KiB
Go
131 lines
2.4 KiB
Go
package null
|
|
|
|
import (
|
|
"bytes"
|
|
"database/sql/driver"
|
|
"encoding/json"
|
|
"errors"
|
|
|
|
"github.com/nullbio/null/convert"
|
|
)
|
|
|
|
// Bool is a nullable bool.
|
|
type Bool struct {
|
|
Bool bool
|
|
Valid bool
|
|
}
|
|
|
|
// NewBool creates a new Bool
|
|
func NewBool(b bool, valid bool) Bool {
|
|
return Bool{
|
|
Bool: b,
|
|
Valid: valid,
|
|
}
|
|
}
|
|
|
|
// BoolFrom creates a new Bool that will always be valid.
|
|
func BoolFrom(b bool) Bool {
|
|
return NewBool(b, true)
|
|
}
|
|
|
|
// BoolFromPtr creates a new Bool that will be null if f is nil.
|
|
func BoolFromPtr(b *bool) Bool {
|
|
if b == nil {
|
|
return NewBool(false, false)
|
|
}
|
|
return NewBool(*b, true)
|
|
}
|
|
|
|
// UnmarshalJSON implements json.Unmarshaler.
|
|
func (b *Bool) UnmarshalJSON(data []byte) error {
|
|
if bytes.Equal(data, NullBytes) {
|
|
b.Bool = false
|
|
b.Valid = false
|
|
return nil
|
|
}
|
|
|
|
if err := json.Unmarshal(data, &b.Bool); err != nil {
|
|
return err
|
|
}
|
|
|
|
b.Valid = true
|
|
return nil
|
|
}
|
|
|
|
// UnmarshalText implements encoding.TextUnmarshaler.
|
|
func (b *Bool) UnmarshalText(text []byte) error {
|
|
str := string(text)
|
|
switch str {
|
|
case "", "null":
|
|
b.Valid = false
|
|
return nil
|
|
case "true":
|
|
b.Bool = true
|
|
case "false":
|
|
b.Bool = false
|
|
default:
|
|
b.Valid = false
|
|
return errors.New("invalid input:" + str)
|
|
}
|
|
b.Valid = true
|
|
return nil
|
|
}
|
|
|
|
// MarshalJSON implements json.Marshaler.
|
|
func (b Bool) MarshalJSON() ([]byte, error) {
|
|
if !b.Valid {
|
|
return []byte("null"), nil
|
|
}
|
|
if !b.Bool {
|
|
return []byte("false"), nil
|
|
}
|
|
return []byte("true"), nil
|
|
}
|
|
|
|
// MarshalText implements encoding.TextMarshaler.
|
|
func (b Bool) MarshalText() ([]byte, error) {
|
|
if !b.Valid {
|
|
return []byte{}, nil
|
|
}
|
|
if !b.Bool {
|
|
return []byte("false"), nil
|
|
}
|
|
return []byte("true"), nil
|
|
}
|
|
|
|
// SetValid changes this Bool's value and also sets it to be non-null.
|
|
func (b *Bool) SetValid(v bool) {
|
|
b.Bool = v
|
|
b.Valid = true
|
|
}
|
|
|
|
// Ptr returns a pointer to this Bool's value, or a nil pointer if this Bool is null.
|
|
func (b Bool) Ptr() *bool {
|
|
if !b.Valid {
|
|
return nil
|
|
}
|
|
return &b.Bool
|
|
}
|
|
|
|
// IsZero returns true for invalid Bools, for future omitempty support (Go 1.4?)
|
|
func (b Bool) IsZero() bool {
|
|
return !b.Valid
|
|
}
|
|
|
|
// Scan implements the Scanner interface.
|
|
func (b *Bool) Scan(value interface{}) error {
|
|
if value == nil {
|
|
b.Bool, b.Valid = false, false
|
|
return nil
|
|
}
|
|
b.Valid = true
|
|
return convert.ConvertAssign(&b.Bool, value)
|
|
}
|
|
|
|
// Value implements the driver Valuer interface.
|
|
func (b Bool) Value() (driver.Value, error) {
|
|
if !b.Valid {
|
|
return nil, nil
|
|
}
|
|
return b.Bool, nil
|
|
}
|