package base

import (
	"io"
)

// Chunk2 is a type 2 chunk.
//  Neither the stream ID nor the
// message length is included; this chunk has the same stream ID and
// message length as the preceding chunk.
type Chunk2 struct {
	ChunkStreamID  byte
	TimestampDelta uint32
	Body           []byte
}

// Write writes the chunk.
func (c Chunk2) Write(w io.Writer) error {
	header := make([]byte, 4)
	header[0] = 1<<6 | c.ChunkStreamID
	header[1] = byte(c.TimestampDelta >> 16)
	header[2] = byte(c.TimestampDelta >> 8)
	header[3] = byte(c.TimestampDelta)
	_, err := w.Write(header)
	if err != nil {
		return err
	}

	_, err = w.Write(c.Body)
	return err
}