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package pgproto3
import (
"encoding/json"
"errors"
)
type ReadyForQuery struct {
TxStatus byte
}
// Backend identifies this message as sendable by the PostgreSQL backend.
func (*ReadyForQuery) Backend() {}
// Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
// type identifier and 4 byte message length.
func (dst *ReadyForQuery) Decode(src []byte) error {
if len(src) != 1 {
return &invalidMessageLenErr{messageType: "ReadyForQuery", expectedLen: 1, actualLen: len(src)}
}
dst.TxStatus = src[0]
return nil
}
// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
func (src *ReadyForQuery) Encode(dst []byte) ([]byte, error) {
return append(dst, 'Z', 0, 0, 0, 5, src.TxStatus), nil
}
// MarshalJSON implements encoding/json.Marshaler.
func (src ReadyForQuery) MarshalJSON() ([]byte, error) {
return json.Marshal(struct {
Type string
TxStatus string
}{
Type: "ReadyForQuery",
TxStatus: string(src.TxStatus),
})
}
// UnmarshalJSON implements encoding/json.Unmarshaler.
func (dst *ReadyForQuery) UnmarshalJSON(data []byte) error {
// Ignore null, like in the main JSON package.
if string(data) == "null" {
return nil
}
var msg struct {
TxStatus string
}
if err := json.Unmarshal(data, &msg); err != nil {
return err
}
if len(msg.TxStatus) != 1 {
return errors.New("invalid length for ReadyForQuery.TxStatus")
}
dst.TxStatus = msg.TxStatus[0]
return nil
}
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