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package mvd
import (
"errors"
"github.com/osm/quake/common/buffer"
"github.com/osm/quake/common/context"
"github.com/osm/quake/protocol"
"github.com/osm/quake/protocol/mvd"
)
var ErrUnknownType = errors.New("unknown type")
type Demo struct {
Data []Data
}
type Data struct {
Target uint32
Timestamp byte
Command byte
Cmd *Cmd
Read *Read
Set *Set
Multiple *Multiple
}
func (d *Demo) Bytes() []byte {
buf := buffer.New()
for i := 0; i < len(d.Data); i++ {
buf.PutBytes(d.Data[i].Bytes())
}
return buf.Bytes()
}
func (d *Data) Bytes() []byte {
buf := buffer.New()
buf.PutByte(d.Timestamp)
buf.PutByte(d.Command)
switch d.Command & 0x7 {
case mvd.DemoMultiple:
buf.PutBytes(d.Multiple.Bytes())
fallthrough
case mvd.DemoStats:
fallthrough
case mvd.DemoSingle:
fallthrough
case mvd.DemoAll:
fallthrough
case protocol.DemoRead:
buf.PutBytes(d.Read.Bytes())
case protocol.DemoSet:
buf.PutBytes(d.Set.Bytes())
case protocol.DemoCmd:
buf.PutBytes(d.Cmd.Bytes())
}
return buf.Bytes()
}
func Parse(ctx *context.Context, data []byte) (*Demo, error) {
var err error
var cmd Demo
buf := buffer.New(buffer.WithData(data))
ctx.SetIsMVD(true)
for buf.Off() < buf.Len() {
var data Data
process:
if data.Timestamp, err = buf.ReadByte(); err != nil {
return nil, err
}
if data.Command, err = buf.ReadByte(); err != nil {
return nil, err
}
switch data.Command & 0x7 {
case mvd.DemoMultiple:
if data.Multiple, err = parseMultiple(ctx, buf); err != nil {
return nil, err
}
data.Target = data.Multiple.LastTo
if data.Multiple.IsHiddenPacket {
cmd.Data = append(cmd.Data, data)
if buf.Off() == buf.Len() {
goto end
}
goto process
}
fallthrough
case mvd.DemoStats:
fallthrough
case mvd.DemoSingle:
// Target determines which client the data is intended
// to reach and can be used in conjunction with the
// updateuserinfo to determine who the client is.
data.Target = uint32(data.Command >> 3)
fallthrough
case mvd.DemoAll:
fallthrough
case protocol.DemoRead:
if data.Read, err = parseRead(ctx, buf); err != nil {
return nil, err
}
case protocol.DemoSet:
if data.Set, err = parseSet(ctx, buf); err != nil {
return nil, err
}
case protocol.DemoCmd:
if data.Cmd, err = parseCmd(ctx, buf); err != nil {
return nil, err
}
default:
return nil, ErrUnknownType
}
cmd.Data = append(cmd.Data, data)
}
end:
return &cmd, nil
}
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