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 }