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neko-custom/server/internal/websocket/messages.go
2020-01-18 23:30:09 +00:00

132 lines
3.7 KiB
Go

package websocket
import (
"encoding/json"
"github.com/gorilla/websocket"
"github.com/pkg/errors"
"github.com/rs/zerolog"
"n.eko.moe/neko/internal/event"
"n.eko.moe/neko/internal/message"
"n.eko.moe/neko/internal/session"
"n.eko.moe/neko/internal/utils"
"n.eko.moe/neko/internal/webrtc"
)
type MessageHandler struct {
logger zerolog.Logger
sessions *session.SessionManager
webrtc *webrtc.WebRTCManager
}
func (h *MessageHandler) Connected(id string, socket *websocket.Conn) error {
return nil
}
func (h *MessageHandler) Disconnected(id string) error {
return h.sessions.Destroy(id)
}
func (h *MessageHandler) Created(id string, session *session.Session) error {
if err := session.Send(message.IdentityProvide{
Message: message.Message{Event: event.IDENTITY_PROVIDE},
ID: id,
}); err != nil {
return err
}
return nil
}
func (h *MessageHandler) Destroyed(id string) error {
if h.sessions.IsHost(id) {
h.sessions.ClearHost()
if err := h.sessions.Brodcast(message.Message{Event: event.CONTROL_RELEASED}, []string{id}); err != nil {
h.logger.Warn().Err(err).Msgf("brodcasting event %s has failed", event.CONTROL_RELEASED)
}
}
return nil
}
func (h *MessageHandler) Message(id string, raw []byte) error {
header := message.Message{}
if err := json.Unmarshal(raw, &header); err != nil {
return err
}
session, ok := h.sessions.Get(id)
if !ok {
errors.Errorf("unknown session id %s", id)
}
switch header.Event {
case event.SDP_PROVIDE:
payload := message.SDP{}
return errors.Wrapf(utils.Unmarshal(&payload, raw, func() error { return h.webrtc.CreatePeer(id, payload.SDP) }), "%s failed", header.Event)
case event.CONTROL_RELEASE:
return errors.Wrapf(h.controlRelease(id, session), "%s failed", header.Event)
case event.CONTROL_REQUEST:
return errors.Wrapf(h.controlRequest(id, session), "%s failed", header.Event)
default:
return errors.Errorf("unknown message event %s", header.Event)
}
}
func (h *MessageHandler) controlRelease(id string, session *session.Session) error {
if !h.sessions.IsHost(id) {
return nil
}
h.logger.Debug().Str("id", id).Msgf("host called %s", event.CONTROL_RELEASED)
h.sessions.ClearHost()
if err := session.Send(message.Message{Event: event.CONTROL_RELEASE}); err != nil {
h.logger.Warn().Err(err).Str("id", id).Msgf("sending event %s has failed", event.CONTROL_RELEASE)
return err
}
if err := h.sessions.Brodcast(message.Message{Event: event.CONTROL_RELEASED}, []string{session.ID}); err != nil {
h.logger.Warn().Err(err).Msgf("brodcasting event %s has failed", event.CONTROL_RELEASED)
return err
}
return nil
}
func (h *MessageHandler) controlRequest(id string, session *session.Session) error {
h.logger.Debug().Str("id", id).Msgf("user called %s", event.CONTROL_REQUEST)
if !h.sessions.HasHost() {
h.sessions.SetHost(id)
if err := session.Send(message.Message{Event: event.CONTROL_GIVE}); err != nil {
h.logger.Warn().Err(err).Str("id", id).Msgf("sending event %s has failed", event.CONTROL_GIVE)
return err
}
if err := h.sessions.Brodcast(message.Message{Event: event.CONTROL_GIVEN}, []string{session.ID}); err != nil {
h.logger.Warn().Err(err).Msgf("brodcasting event %s has failed", event.CONTROL_GIVEN)
return err
}
return nil
}
if err := session.Send(message.Message{Event: event.CONTROL_LOCKED}); err != nil {
h.logger.Warn().Err(err).Str("id", id).Msgf("sending event %s has failed", event.CONTROL_LOCKED)
return err
}
host, ok := h.sessions.GetHost()
if ok {
if err := host.Send(message.Message{Event: event.CONTROL_REQUESTING}); err != nil {
h.logger.Warn().Err(err).Str("id", id).Msgf("sending event %s has failed", event.CONTROL_REQUESTING)
return err
}
}
return nil
}