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package pgproto3
import (
"bytes"
"encoding/json"
"github.com/jackc/pgx/v5/internal/pgio"
)
type CommandComplete struct {
CommandTag []byte
}
// Backend identifies this message as sendable by the PostgreSQL backend.
func (*CommandComplete) 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 *CommandComplete) Decode(src []byte) error {
idx := bytes.IndexByte(src, 0)
if idx == -1 {
return &invalidMessageFormatErr{messageType: "CommandComplete", details: "unterminated string"}
}
if idx != len(src)-1 {
return &invalidMessageFormatErr{messageType: "CommandComplete", details: "string terminated too early"}
}
dst.CommandTag = src[:idx]
return nil
}
// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
func (src *CommandComplete) Encode(dst []byte) []byte {
dst = append(dst, 'C')
sp := len(dst)
dst = pgio.AppendInt32(dst, -1)
dst = append(dst, src.CommandTag...)
dst = append(dst, 0)
pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
return dst
}
// MarshalJSON implements encoding/json.Marshaler.
func (src CommandComplete) MarshalJSON() ([]byte, error) {
return json.Marshal(struct {
Type string
CommandTag string
}{
Type: "CommandComplete",
CommandTag: string(src.CommandTag),
})
}
// UnmarshalJSON implements encoding/json.Unmarshaler.
func (dst *CommandComplete) UnmarshalJSON(data []byte) error {
// Ignore null, like in the main JSON package.
if string(data) == "null" {
return nil
}
var msg struct {
CommandTag string
}
if err := json.Unmarshal(data, &msg); err != nil {
return err
}
dst.CommandTag = []byte(msg.CommandTag)
return nil
}
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