server/protocol.go

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package main
import (
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"bitbucket.org/hackerbots/bot"
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"code.google.com/p/go.net/websocket"
"errors"
)
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func Negociate(ws *websocket.Conn, id string, width, height float64) (*bot.Config, error) {
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var err error
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err = websocket.JSON.Send(ws, bot.NewIdRequest(id))
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if err != nil {
return nil, errors.New("generic server error")
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}
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var clientid bot.ClientID
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err = websocket.JSON.Receive(ws, &clientid)
if err != nil {
return nil, errors.New("could not parse id")
}
if v, msg := clientid.Valid(); !v {
websocket.JSON.Send(
ws,
bot.NewFailure(msg),
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)
return nil, errors.New(msg)
}
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gameParam := bot.NewGameParam(width, height)
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err = websocket.JSON.Send(ws, gameParam)
if err != nil {
websocket.JSON.Send(ws, bot.NewFailure("generic server error"))
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return nil, err
}
switch clientid.Type {
case "robot":
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var conf bot.Config
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for {
err = websocket.JSON.Receive(ws, &conf)
if err != nil {
return nil, err
}
// TODO: verify conf's type
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if conf.Stats.Valid() {
_ = websocket.JSON.Send(ws, bot.NewHandshake(id, true))
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break
} else {
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_ = websocket.JSON.Send(ws, bot.NewHandshake(id, false))
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}
}
return &conf, nil
case "spectator":
return nil, nil
}
return nil, nil
}