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package pgproto3
import (
"bytes"
"encoding/json"
"github.com/jackc/pgx/v5/internal/pgio"
)
type ParameterStatus struct {
Name string
Value string
}
// Backend identifies this message as sendable by the PostgreSQL backend.
func (*ParameterStatus) 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 *ParameterStatus) Decode(src []byte) error {
buf := bytes.NewBuffer(src)
b, err := buf.ReadBytes(0)
if err != nil {
return err
}
name := string(b[:len(b)-1])
b, err = buf.ReadBytes(0)
if err != nil {
return err
}
value := string(b[:len(b)-1])
*dst = ParameterStatus{Name: name, Value: value}
return nil
}
// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
func (src *ParameterStatus) Encode(dst []byte) []byte {
dst = append(dst, 'S')
sp := len(dst)
dst = pgio.AppendInt32(dst, -1)
dst = append(dst, src.Name...)
dst = append(dst, 0)
dst = append(dst, src.Value...)
dst = append(dst, 0)
pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
return dst
}
// MarshalJSON implements encoding/json.Marshaler.
func (ps ParameterStatus) MarshalJSON() ([]byte, error) {
return json.Marshal(struct {
Type string
Name string
Value string
}{
Type: "ParameterStatus",
Name: ps.Name,
Value: ps.Value,
})
}
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