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package s2cchallenge
import (
"github.com/osm/quake/common/buffer"
"github.com/osm/quake/common/context"
"github.com/osm/quake/protocol"
"github.com/osm/quake/protocol/fte"
"github.com/osm/quake/protocol/mvd"
)
type Command struct {
ChallengeID string
Extensions []*protocol.Extension
}
func (cmd *Command) Bytes() []byte {
buf := buffer.New()
buf.PutByte(byte(protocol.S2CChallenge))
buf.PutString(cmd.ChallengeID)
for _, ext := range cmd.Extensions {
buf.PutBytes(ext.Bytes())
}
return buf.Bytes()
}
func Parse(ctx *context.Context, buf *buffer.Buffer) (*Command, error) {
var err error
var cmd Command
if cmd.ChallengeID, err = buf.GetString(); err != nil {
return nil, err
}
for buf.Off() < buf.Len() {
version, err := buf.GetUint32()
if err != nil {
return nil, err
}
extensions, err := buf.GetUint32()
if err != nil {
return nil, err
}
if ctx.GetIsFTEEnabled() && version == fte.ProtocolVersion {
ctx.SetFTEProtocolExtension(extensions)
if extensions&fte.ExtensionFloatCoords != 0 {
ctx.SetAngleSize(1)
ctx.SetCoordSize(2)
}
}
if ctx.GetIsFTE2Enabled() && version == fte.ProtocolVersion2 {
ctx.SetFTE2ProtocolExtension(extensions)
}
if ctx.GetIsMVDEnabled() && version == mvd.ProtocolVersion {
ctx.SetMVDProtocolExtension(extensions)
}
cmd.Extensions = append(cmd.Extensions, &protocol.Extension{
Version: version,
Extensions: extensions,
})
}
return &cmd, nil
}
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