Zippytal-Node/squadManager.go

751 lines
22 KiB
Go

package localserver
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"os"
"path/filepath"
"strconv"
sync "sync"
"github.com/google/uuid"
"github.com/pion/webrtc/v3"
)
type SquadManager struct {
ID string
Squads map[string]*Squad
LocalSD map[string]*webrtc.SessionDescription
RTCPeerConnections map[string]*RTCPeerConnection
DataChannels map[string]*DataChannel
PendingCandidates map[string][]*webrtc.ICECandidate
stream SignalingService_LinkClient
squadFlag *uint32
peerConnectionFlag *uint32
localSDFlag *uint32
dataChannelFlag *uint32
candidateFlag *uint32
}
type Squad struct {
ID string
Name string
ImageURL string
Owner string
CreationDate string
AuthorizedMembers []string
DataChannels map[string]*DataChannel
DataChannelsFlag *uint32
SquadRequestScheduler *SquadRequestScheduler
Initialized bool
}
func NewSquad(hostId string, squadId string, squadName string, imageUrl string, owner string, creationDate string, initialized bool, authorizedMembers []string) (squad *Squad, err error) {
dataChannels, dataChannelFlag := make(map[string]*DataChannel), uint32(0)
squadChatHandler, err := NewSquadChatsHandler(hostId, squadId, squadName, owner, authorizedMembers, dataChannels, &dataChannelFlag)
if err != nil {
return nil, err
}
squadVideoChannelsHandler, err := NewSquadVideoChannelsHandler(hostId, squadId, owner, authorizedMembers, dataChannels, &dataChannelFlag)
if err != nil {
return
}
squadNotificationsHandler, err := NewSquadNotificationsHandler(hostId, squadId, owner, authorizedMembers, dataChannels, &dataChannelFlag)
if err != nil {
return
}
squadScheduler, e := NewSquadRequestScheduler(authorizedMembers, squadVideoChannelsHandler, squadChatHandler, squadNotificationsHandler)
go func() {
for range e {
// logger.Println("from scheduler :", schedErr)
}
}()
squad = &Squad{
ID: squadId,
Name: squadName,
ImageURL: imageUrl,
Owner: owner,
CreationDate: creationDate,
Initialized: initialized,
SquadRequestScheduler: squadScheduler,
DataChannels: dataChannels,
DataChannelsFlag: &dataChannelFlag,
}
fmt.Println("squad fking creeaeted", squad.Name)
return
}
func NewSquadManager(id string, token string) (squadManager *SquadManager, err error) {
squadFlag := uint32(0)
peerConnectionFlag := uint32(0)
localSDFlag := uint32(0)
dataChannelFlag := uint32(0)
candidateFlag := uint32(0)
dataChannels := make(map[string]*DataChannel)
squadMap := make(map[string]*Squad)
squads, err := squadManager.fetchSquads(id, token)
if err != nil {
return
}
for _, squad := range squads {
z, err := NewSquad(id, squad.ID, squad.Name, squad.ImageURL, squad.Owner, squad.CreationDate, true, squad.AuthorizedMembers)
if err != nil {
return nil, err
}
squadMap[squad.ID] = z
}
squadsFolder, err := os.ReadDir(filepath.Join(dataPath, "data", "squads"))
if err != nil {
if os.IsNotExist(err) {
if err = os.MkdirAll(filepath.Join(dataPath, "data", "squads"), 0770); err != nil {
return
}
} else {
return nil, err
}
}
// logger.Println(squadMap)
squadManager = &SquadManager{
ID: id,
Squads: squadMap,
LocalSD: make(map[string]*webrtc.SessionDescription),
RTCPeerConnections: make(map[string]*RTCPeerConnection),
DataChannels: dataChannels,
PendingCandidates: make(map[string][]*webrtc.ICECandidate),
squadFlag: &squadFlag,
peerConnectionFlag: &peerConnectionFlag,
localSDFlag: &localSDFlag,
dataChannelFlag: &dataChannelFlag,
candidateFlag: &candidateFlag,
}
for _, z := range squadsFolder {
if _, ok := squadMap[z.Name()]; !ok {
// logger.Println(squadManager.DeleteSquad(z.Name()))
}
}
return
}
func (zm *SquadManager) sendSignalingMessage(messageType, from, to string, payload map[string]interface{}) (err error) {
bs, err := json.Marshal(payload)
if err != nil {
return
}
err = zm.stream.Send(&SignalingMessage{
Type: messageType,
From: from,
To: to,
Payload: bs,
})
return
}
func (zm *SquadManager) DeleteSquad(squadId string) error {
return os.RemoveAll(filepath.Join(dataPath, "data", "squads", squadId))
}
func (zm *SquadManager) fetchSquads(nodeId string, token string) (squads []*Squad, err error) {
em := NewEncryptionManager()
sig := em.SignRequestHMAC(nodeId)
body, err := json.Marshal(map[string]interface{}{
"type": LIST_HOSTED_SQUADS_BY_HOST,
"mac": sig,
"from": nodeId,
"peerType": "node",
"payload": map[string]string{
"host": nodeId,
"lastIndex": "0",
},
})
if err != nil {
return
}
res, err := HTTPClient.Post("https://dev.zippytal.com/req", "application/json", bytes.NewReader(body))
if err != nil {
// logger.Println("error come from there inn squad manager")
return
}
bs, err := io.ReadAll(res.Body)
if err != nil {
return
}
var payload map[string]any
if err = json.Unmarshal(bs, &payload); err != nil {
return
}
b, err := json.Marshal(payload["squads"])
if err != nil {
return
}
err = json.Unmarshal(b, &squads)
return
}
func (zm *SquadManager) CreateOffer(ctx context.Context, target string, from string, squadId string, cb OnICECandidateFunc) (err error) {
peerConnection, err := zm.createPeerConnection(target, from, squadId, webrtc.SDPTypeOffer, cb)
if err != nil {
return
}
// logger.Println("connection created")
rawOffer, err := peerConnection.CreateOffer(nil)
if err != nil {
return
}
if err = peerConnection.SetLocalDescription(rawOffer); err != nil {
return
}
_ = atomicallyExecute(zm.peerConnectionFlag, func() (err error) {
id := uuid.New().String()
// logger.Println("adding for target", target)
zm.RTCPeerConnections[target] = &RTCPeerConnection{
id: id,
PeerConnection: peerConnection,
makingOffer: true,
makingOfferLock: &sync.Mutex{},
negotiate: zm.negotiate,
}
return
})
err = zm.sendSignalingMessage(string(HOSTED_SQUAD_OFFER), zm.ID, target, map[string]any{
"to": target,
"from": zm.ID,
"sdp": rawOffer.SDP,
})
return
}
func (zm *SquadManager) HandleOffer(ctx context.Context, from string, to string, req map[string]string, cb OnICECandidateFunc) (err error) {
done, errCh := make(chan struct{}), make(chan error)
go func() {
if _, ok := zm.Squads[req["squadId"]]; !ok {
err = fmt.Errorf("no corresponding squad")
errCh <- err
return
}
// logger.Println("handling squad offer")
_ = atomicallyExecute(zm.squadFlag, func() (err error) {
return
})
if _, ok := zm.RTCPeerConnections[from]; ok {
if e := zm.HandleLeavingMember(from, req["squadId"], false); e != nil {
// logger.Println(e)
}
}
peerConnection, err := zm.createPeerConnection(from, to, req["squadId"], webrtc.SDPTypeAnswer, cb)
if err != nil {
errCh <- err
return
}
// logger.Println("peer connection created")
_ = atomicallyExecute(zm.peerConnectionFlag, func() (err error) {
id := uuid.New().String()
zm.RTCPeerConnections[from] = &RTCPeerConnection{
PeerConnection: peerConnection,
id: id,
makingOffer: false,
makingOfferLock: &sync.Mutex{},
negotiate: zm.negotiate,
}
// logger.Println("peer connection added to map")
offer := webrtc.SessionDescription{
Type: webrtc.SDPTypeOffer,
SDP: req[SDP],
}
if err = peerConnection.SetRemoteDescription(offer); err != nil {
errCh <- err
return
}
rawAnswer, err := peerConnection.CreateAnswer(nil)
if err != nil {
errCh <- err
return
}
_ = atomicallyExecute(zm.localSDFlag, func() (err error) {
zm.LocalSD[from] = &rawAnswer
return
})
if err = peerConnection.SetLocalDescription(rawAnswer); err != nil {
errCh <- err
return
}
if err = zm.sendSignalingMessage(string(HOSTED_SQUAD_ANSWER), zm.ID, from, map[string]any{
"to": from,
"from": zm.ID,
"sdp": rawAnswer.SDP,
}); err != nil {
errCh <- err
return
}
done <- struct{}{}
return
})
}()
select {
case <-done:
return
case err = <-errCh:
return
case <-ctx.Done():
err = ctx.Err()
return
}
}
func (zm *SquadManager) HandleAnswer(ctx context.Context, from string, to string, req map[string]string) (err error) {
defer func() {
if r := recover(); err != nil {
logger.Printf("recover from panic in handle answer : %v\n", r)
}
}()
if err = atomicallyExecute(zm.peerConnectionFlag, func() (err error) {
if _, ok := zm.RTCPeerConnections[from]; !ok {
err = fmt.Errorf("no corresponding peer connection for id : %s", from)
return
}
peerConnnection := zm.RTCPeerConnections[from]
// logger.Println("---------------------")
// logger.Println(req[SDP])
// logger.Println("---------------------")
if err = peerConnnection.SetRemoteDescription(webrtc.SessionDescription{
Type: webrtc.SDPTypeAnswer,
SDP: req[SDP],
}); err != nil {
// logger.Println("error occured while setting remote description in handle answer")
return
}
return
}); err != nil {
return
}
if err = zm.sendSignalingMessage(string(HOSTED_SQUAD_COUNTER_OFFER), zm.ID, from, map[string]any{
"from": zm.ID,
"to": from,
}); err != nil {
return
}
_ = atomicallyExecute(zm.candidateFlag, func() (err error) {
for _, candidate := range zm.PendingCandidates[from] {
// logger.Println("sending candidate from answer to", from)
if err = zm.sendSignalingMessage(string(HOSTED_SQUAD_WEBRTC_CANDIDATE), zm.ID, from, map[string]any{
"from": zm.ID,
"to": from,
"candidate": candidate.ToJSON().Candidate,
"sdpMid": *candidate.ToJSON().SDPMid,
"sdpMLineIndex": strconv.Itoa(int(*candidate.ToJSON().SDPMLineIndex)),
}); err != nil {
// logger.Println(err)
continue
}
}
delete(zm.PendingCandidates, from)
return
})
_ = atomicallyExecute(zm.localSDFlag, func() (err error) {
delete(zm.LocalSD, from)
return
})
return
}
func (zm *SquadManager) HandleCounterOffer(ctx context.Context, from string, to string, req map[string]string) (err error) {
_ = atomicallyExecute(zm.candidateFlag, func() (err error) {
for _, candidate := range zm.PendingCandidates[from] {
// logger.Println("sending candidate to", from)
if err = zm.sendSignalingMessage(string(HOSTED_SQUAD_WEBRTC_CANDIDATE), zm.ID, from, map[string]any{
"from": zm.ID,
"to": from,
"candidate": candidate.ToJSON().Candidate,
"sdpMid": *candidate.ToJSON().SDPMid,
"sdpMLineIndex": strconv.Itoa(int(*candidate.ToJSON().SDPMLineIndex)),
}); err != nil {
return
}
}
delete(zm.PendingCandidates, from)
return
})
_ = atomicallyExecute(zm.localSDFlag, func() (err error) {
delete(zm.LocalSD, from)
return
})
return
}
func (zm *SquadManager) createPeerConnection(target string, from string, squadId string, peerType webrtc.SDPType, cb OnICECandidateFunc) (peerConnection *webrtc.PeerConnection, err error) {
defer func() {
if r := recover(); err != nil {
logger.Printf("recover from panic : %v\n", r)
}
}()
config := webrtc.Configuration{
ICEServers: []webrtc.ICEServer{
{
URLs: []string{"stun:stun.l.google.com:19302"},
},
},
SDPSemantics: webrtc.SDPSemanticsUnifiedPlan,
}
peerConnection, err = webrtc.NewPeerConnection(config)
if err != nil {
return
}
// logger.Println("---------------------------------------------------")
if peerType == webrtc.SDPTypeOffer {
channel, err := peerConnection.CreateDataChannel("data", &webrtc.DataChannelInit{})
if err != nil {
return nil, err
}
reqChan := make(chan *SquadRequest)
channel.OnOpen(func() {
// logger.Println(squadId)
if _, ok := zm.Squads[squadId]; ok {
// logger.Println("this squad exist")
_ = atomicallyExecute(zm.Squads[squadId].DataChannelsFlag, func() (err error) {
x := uint32(0)
zm.Squads[squadId].DataChannels[target] = &DataChannel{DataChannel: channel, bufferedAmountLowThresholdReached: make(<-chan struct{}), l: &x}
return
})
if _, ok := zm.Squads[squadId]; !ok {
err = fmt.Errorf("no corresponding squads")
return
}
done, err := zm.Squads[squadId].SquadRequestScheduler.Schedule(reqChan)
bs, jsonErr := json.Marshal(&SquadResponse{
Type: "user_squad_init",
From: squadId,
To: target,
Payload: map[string]interface{}{},
})
if jsonErr != nil {
// logger.Println("error in open channel", jsonErr)
return
}
if sendErr := channel.SendText(string(bs)); sendErr != nil {
// logger.Println("error in open channel send", sendErr)
return
}
go func() {
for {
select {
case <-done:
return
case <-err:
// logger.Println("----- error from scheduler:", e)
}
}
}()
}
})
channel.OnClose(func() {
if _, closed := <-reqChan; !closed {
close(reqChan)
}
//_ = zm.HandleLeavingMember(target, squadId, true)
})
channel.OnError(func(err error) {
if _, closed := <-reqChan; !closed {
close(reqChan)
}
//_ = zm.HandleLeavingMember(target, squadId, true)
})
channel.OnMessage(func(msg webrtc.DataChannelMessage) {
var req SquadRequest
if err := json.Unmarshal(msg.Data, &req); err != nil {
// logger.Println(err)
return
}
// logger.Println("incoming request", req)
reqChan <- &req
})
// logger.Println("new channel for target : ", target)
// logger.Println(target)
_ = atomicallyExecute(zm.dataChannelFlag, func() (err error) {
l := uint32(0)
zm.DataChannels[target] = &DataChannel{
DataChannel: channel,
bufferedAmountLowThresholdReached: make(<-chan struct{}),
l: &l,
}
return
})
} else {
peerConnection.OnDataChannel(func(dc *webrtc.DataChannel) {
_ = atomicallyExecute(zm.dataChannelFlag, func() (err error) {
l := uint32(0)
zm.DataChannels[target] = &DataChannel{
DataChannel: dc,
l: &l,
}
return
})
reqChan := make(chan *SquadRequest, 100)
if dc.Label() == "data" {
dc.OnOpen(func() {
// logger.Println(squadId)
if _, ok := zm.Squads[squadId]; ok {
// logger.Println("this squad exist")
_ = atomicallyExecute(zm.Squads[squadId].DataChannelsFlag, func() (err error) {
// logger.Println("adding dc to dc map")
x := uint32(0)
zm.Squads[squadId].DataChannels[target] = &DataChannel{DataChannel: dc, bufferedAmountLowThresholdReached: make(<-chan struct{}), l: &x}
return
})
if _, ok := zm.Squads[squadId]; !ok {
err = fmt.Errorf("no corresponding squads")
return
}
done, err := zm.Squads[squadId].SquadRequestScheduler.Schedule(reqChan)
go func() {
for {
select {
case <-done:
return
case <-err:
}
}
}()
}
})
dc.OnClose(func() {
fmt.Println("closing gracefully event dc...")
if _, closed := <-reqChan; !closed {
close(reqChan)
}
})
dc.OnError(func(err error) {
// logger.Println("--------------- error in dc:", err)
if _, closed := <-reqChan; !closed {
close(reqChan)
}
})
dc.OnMessage(func(msg webrtc.DataChannelMessage) {
var req SquadRequest
if err := json.Unmarshal(msg.Data, &req); err != nil {
// logger.Println(err)
return
}
// logger.Println("incoming request", req)
go func() {
reqChan <- &req
}()
})
_ = atomicallyExecute(zm.dataChannelFlag, func() (err error) {
l := uint32(0)
zm.DataChannels[target] = &DataChannel{
DataChannel: dc,
bufferedAmountLowThresholdReached: make(<-chan struct{}),
l: &l,
}
return
})
} else {
if _, ok := zm.Squads[squadId]; ok {
fmt.Println("got new mtfking datachannel")
fmt.Println(dc.Label())
scheduler := zm.Squads[squadId].SquadRequestScheduler
l := uint32(0)
datachannel := &DataChannel{
DataChannel: dc,
bufferedAmountLowThresholdReached: make(<-chan struct{}),
l: &l,
}
catched := scheduler.DispatchDatachannel(context.Background(), datachannel)
if !catched {
if closeErr := datachannel.DataChannel.Close(); closeErr != nil {
// logger.Println(closeErr)
}
}
}
}
})
}
peerConnection.OnConnectionStateChange(func(pcs webrtc.PeerConnectionState) {
if pcs == webrtc.PeerConnectionStateDisconnected || pcs == webrtc.PeerConnectionStateFailed {
// logger.Println(pcs)
if err = zm.HandleLeavingMember(target, squadId, true); err != nil {
// logger.Println(err)
}
}
})
peerConnection.OnICEConnectionStateChange(func(is webrtc.ICEConnectionState) {
// logger.Printf("ICE connection state has changed %s\n", is.String())
})
peerConnection.OnICECandidate(func(i *webrtc.ICECandidate) {
if i == nil {
return
}
_ = atomicallyExecute(zm.candidateFlag, func() (err error) {
desc := peerConnection.RemoteDescription()
if desc == nil {
// logger.Println("generated candidate appended to list : ", i)
zm.PendingCandidates[target] = append(zm.PendingCandidates[target], i)
} else {
// logger.Println("generated candidate : ", i)
if iceCandidateErr := cb(target, i); iceCandidateErr != nil {
// logger.Println(iceCandidateErr)
}
}
return
})
})
return
}
func (zm *SquadManager) HandleRennegotiationOffer(from, sdp string) (err error) {
err = atomicallyExecute(zm.peerConnectionFlag, func() (err error) {
if _, ok := zm.RTCPeerConnections[from]; !ok {
err = fmt.Errorf("no corresponding peer connection for id %s", from)
return
}
if err = zm.RTCPeerConnections[from].SetRemoteDescription(webrtc.SessionDescription{SDP: sdp, Type: webrtc.SDPTypeOffer}); err != nil {
return
}
localSd, err := zm.RTCPeerConnections[from].CreateAnswer(nil)
if err != nil {
return
}
if err = zm.RTCPeerConnections[from].SetLocalDescription(localSd); err != nil {
return
}
if err = zm.sendSignalingMessage(string(HOSTED_SQUAD_WEBRTC_RENNEGOTIATION_ANSWER), zm.ID, from, map[string]any{
"to": from,
"sdp": localSd.SDP,
}); err != nil {
// logger.Println(err)
return
}
return
})
return
}
func (zm *SquadManager) HandleRennegotiationAnswer(from string, sdp string) (err error) {
_ = atomicallyExecute(zm.peerConnectionFlag, func() (err error) {
if _, ok := zm.RTCPeerConnections[from]; !ok {
err = fmt.Errorf("no corresponding peer connection for id %s", from)
return
}
err = zm.RTCPeerConnections[from].SetRemoteDescription(webrtc.SessionDescription{SDP: sdp, Type: webrtc.SDPTypeAnswer})
return
})
return
}
func (zm *SquadManager) AddCandidate(candidate *webrtc.ICECandidateInit, from string) (err error) {
_ = atomicallyExecute(zm.candidateFlag, func() (err error) {
if candidate != nil {
if connection, ok := zm.RTCPeerConnections[from]; ok {
err = connection.AddICECandidate(*candidate)
}
}
return
})
return
}
func (zm *SquadManager) HandleLeavingMember(id, squadId string, signalLeaving bool) (err error) {
fmt.Println("uwuwuwuuwuwuwuwuuwuwuuwuwuwuwuuwwuwu")
fmt.Println("handling leaving member")
// logger.Println("---------------- handling leaving member", id)
if err = atomicallyExecute(zm.peerConnectionFlag, func() (err error) {
if _, ok := zm.RTCPeerConnections[id]; !ok {
err = fmt.Errorf("no correponding peerconnection for id %s", id)
return
}
return
}); err != nil {
return
}
if signalLeaving {
nerr := zm.notifyLeavingMember(id, squadId, NodeID)
fmt.Println(nerr)
}
err = atomicallyExecute(zm.squadFlag, func() (err error) {
// logger.Println(err)
// logger.Println("---------------- cleaning squad handlers", id)
if squad, ok := zm.Squads[squadId]; ok {
for _, handlersPublishers := range squad.SquadRequestScheduler.handlersPublishers {
go func(hp chan<- *SquadRequest) {
hp <- &SquadRequest{
ReqType: LEAVE_SQUAD,
From: id,
Payload: map[string]interface{}{
"userId": id,
},
}
}(handlersPublishers)
}
if err = atomicallyExecute(squad.DataChannelsFlag, func() (err error) {
defer delete(squad.DataChannels, id)
if dataChannel, ok := squad.DataChannels[id]; ok {
if err = dataChannel.DataChannel.Close(); err != nil {
return
}
}
return
}); err != nil {
fmt.Println(err)
}
// logger.Println("datachannels cleaned", id)
} else {
err = fmt.Errorf("no corresponding squad for squadId %s", squadId)
}
// logger.Println(err)
err = atomicallyExecute(zm.peerConnectionFlag, func() (err error) {
if _, ok := zm.RTCPeerConnections[id]; ok {
defer delete(zm.RTCPeerConnections, id)
if err = zm.RTCPeerConnections[id].Close(); err != nil {
return
}
}
return
})
fmt.Println(err)
_ = atomicallyExecute(zm.candidateFlag, func() (err error) {
delete(zm.PendingCandidates, id)
return
})
return
})
return
}
func (zm *SquadManager) notifyLeavingMember(userId, squadId, hostId string) (err error) {
em := NewEncryptionManager()
sig := em.SignRequestHMAC(NodeID)
body, err := json.Marshal(map[string]interface{}{
"type": DISCONNECT_SQUAD_MEMBER,
"mac": sig,
"from": NodeID,
"peerType": "node",
"payload": map[string]string{
"squadId": squadId,
"userId": userId,
},
})
if err != nil {
return
}
_, err = HTTPClient.Post("https://dev.zippytal.com/req", "application/json", bytes.NewReader(body))
if err != nil {
// logger.Println("error come from there in squad manager")
return
}
return
}
func (zm *SquadManager) negotiate(target string, squadId string) {
_ = atomicallyExecute(zm.peerConnectionFlag, func() (err error) {
if _, ok := zm.RTCPeerConnections[target]; !ok {
err = fmt.Errorf("no peerConnections")
return
}
return
})
}