diff options
Diffstat (limited to 'vendor/github.com/jackc/pgproto3/v2/notification_response.go')
-rw-r--r-- | vendor/github.com/jackc/pgproto3/v2/notification_response.go | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/vendor/github.com/jackc/pgproto3/v2/notification_response.go b/vendor/github.com/jackc/pgproto3/v2/notification_response.go new file mode 100644 index 000000000..e762eb967 --- /dev/null +++ b/vendor/github.com/jackc/pgproto3/v2/notification_response.go @@ -0,0 +1,73 @@ +package pgproto3 + +import ( + "bytes" + "encoding/binary" + "encoding/json" + + "github.com/jackc/pgio" +) + +type NotificationResponse struct { + PID uint32 + Channel string + Payload string +} + +// Backend identifies this message as sendable by the PostgreSQL backend. +func (*NotificationResponse) 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 *NotificationResponse) Decode(src []byte) error { + buf := bytes.NewBuffer(src) + + pid := binary.BigEndian.Uint32(buf.Next(4)) + + b, err := buf.ReadBytes(0) + if err != nil { + return err + } + channel := string(b[:len(b)-1]) + + b, err = buf.ReadBytes(0) + if err != nil { + return err + } + payload := string(b[:len(b)-1]) + + *dst = NotificationResponse{PID: pid, Channel: channel, Payload: payload} + return nil +} + +// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length. +func (src *NotificationResponse) Encode(dst []byte) []byte { + dst = append(dst, 'A') + sp := len(dst) + dst = pgio.AppendInt32(dst, -1) + + dst = pgio.AppendUint32(dst, src.PID) + dst = append(dst, src.Channel...) + dst = append(dst, 0) + dst = append(dst, src.Payload...) + dst = append(dst, 0) + + pgio.SetInt32(dst[sp:], int32(len(dst[sp:]))) + + return dst +} + +// MarshalJSON implements encoding/json.Marshaler. +func (src NotificationResponse) MarshalJSON() ([]byte, error) { + return json.Marshal(struct { + Type string + PID uint32 + Channel string + Payload string + }{ + Type: "NotificationResponse", + PID: src.PID, + Channel: src.Channel, + Payload: src.Payload, + }) +} |