feat(communities): add magnetlink to RequestToJoinResponse

This is done so that when member join a community by being accepted by
the community owner, they also receive the most up-to-date magnetlink
along with it.

protocol/messenger.go

@@ -706,7 +706,7 @@ func (m *Messenger) Start() (*MessengerResponse, error) {
 		return nil, err
 	}
 
-	if m.config.torrentConfig != nil && m.config.torrentConfig.Enabled && m.communitiesManager.TorrentClientStarted() {
+	if m.torrentClientReady() {
 		adminCommunities, err := m.communitiesManager.Created()
 		if err == nil && len(adminCommunities) > 0 {
 			available := m.SubscribeMailserverAvailable()

protocol/messenger_communities.go

@@ -719,6 +719,15 @@ func (m *Messenger) AcceptRequestToJoinCommunity(request *requests.AcceptRequest
 		Grant:       grant,
 	}
 
+	if m.torrentClientReady() && m.communitiesManager.TorrentFileExists(community.IDString()) {
+		magnetlink, err := m.communitiesManager.GetHistoryArchiveMagnetlink(community.ID())
+		if err != nil {
+			m.logger.Warn("couldn't get magnet link for community", zap.Error(err))
+			return nil, err
+		}
+		requestToJoinResponseProto.MagnetUri = magnetlink
+	}
+
 	payload, err := proto.Marshal(requestToJoinResponseProto)
 	if err != nil {
 		return nil, err
@@ -1076,7 +1085,7 @@ func (m *Messenger) EditCommunity(request *requests.EditCommunity) (*MessengerRe
 
 	id := community.ID()
 
-	if m.config.torrentConfig != nil && m.config.torrentConfig.Enabled && m.communitiesManager.TorrentClientStarted() {
+	if m.torrentClientReady() {
 		if !communitySettings.HistoryArchiveSupportEnabled {
 			m.communitiesManager.StopHistoryArchiveTasksInterval(id)
 		} else if !m.communitiesManager.IsSeedingHistoryArchiveTorrent(id) {
@@ -1139,7 +1148,7 @@ func (m *Messenger) ImportCommunity(ctx context.Context, key *ecdsa.PrivateKey)
 		return nil, err
 	}
 
-	if m.config.torrentConfig != nil && m.config.torrentConfig.Enabled && m.communitiesManager.TorrentClientStarted() {
+	if m.torrentClientReady() {
 		var communities []*communities.Community
 		communities = append(communities, community)
 		go m.InitHistoryArchiveTasks(communities)
@@ -2984,10 +2993,7 @@ func (m *Messenger) RequestImportDiscordCommunity(request *requests.ImportDiscor
 			}
 		}
 
-		if m.config.torrentConfig != nil &&
+		if m.torrentClientReady() && communitySettings.HistoryArchiveSupportEnabled {
-			m.config.torrentConfig.Enabled &&
-			communitySettings.HistoryArchiveSupportEnabled &&
-			m.communitiesManager.TorrentClientStarted() {
 
 			err = m.communitiesManager.SeedHistoryArchiveTorrent(discordCommunity.ID())
 			if err != nil {
@@ -3101,6 +3107,15 @@ func (m *Messenger) pinMessagesToWakuMessages(pinMessages []*common.PinMessage,
 	return wakuMessages, nil
 }
 
+func (m *Messenger) torrentClientReady() bool {
+	// Simply checking for `torrentConfig.Enabled` isn't enough
+	// as there's a possiblity that the torrent client couldn't
+	// be instantiated (for example in case of port conflicts)
+	return m.config.torrentConfig != nil &&
+		m.config.torrentConfig.Enabled &&
+		m.communitiesManager.TorrentClientStarted()
+}
+
 func (m *Messenger) chatMessagesToWakuMessages(chatMessages []*common.Message, c *communities.Community) ([]*types.Message, error) {
 	wakuMessages := make([]*types.Message, 0)
 	for _, msg := range chatMessages {

protocol/messenger_handler.go

@@ -906,7 +906,7 @@ func (m *Messenger) HandleHistoryArchiveMagnetlinkMessage(state *ReceivedMessage
 		return err
 	}
 
-	if m.config.torrentConfig != nil && m.config.torrentConfig.Enabled && settings != nil && settings.HistoryArchiveSupportEnabled {
+	if m.torrentClientReady() && settings != nil && settings.HistoryArchiveSupportEnabled {
 		signedByOwnedCommunity, err := m.communitiesManager.IsAdminCommunity(communityPubKey)
 		if err != nil {
 			return err
@@ -950,13 +950,22 @@ func (m *Messenger) HandleHistoryArchiveMagnetlinkMessage(state *ReceivedMessage
 				// this wait groups tracks all ongoing tasks across communities
 				m.downloadHistoryArchiveTasksWaitGroup.Add(1)
 				defer m.downloadHistoryArchiveTasksWaitGroup.Done()
+				m.downloadAndImportHistoryArchives(id, magnetlink, task.Cancel)
+			}(currentTask)
 
-				downloadTaskInfo, err := m.communitiesManager.DownloadHistoryArchivesByMagnetlink(id, magnetlink, task.Cancel)
+			return m.communitiesManager.UpdateMagnetlinkMessageClock(id, clock)
+		}
+	}
+	return nil
+}
+
+func (m *Messenger) downloadAndImportHistoryArchives(id types.HexBytes, magnetlink string, cancel chan struct{}) {
+	downloadTaskInfo, err := m.communitiesManager.DownloadHistoryArchivesByMagnetlink(id, magnetlink, cancel)
 	if err != nil {
 		logMsg := "failed to download history archive data"
 		if err == communities.ErrTorrentTimedout {
 			m.communitiesManager.LogStdout("torrent has timed out, trying once more...")
-						downloadTaskInfo, err = m.communitiesManager.DownloadHistoryArchivesByMagnetlink(id, magnetlink, task.Cancel)
+			downloadTaskInfo, err = m.communitiesManager.DownloadHistoryArchivesByMagnetlink(id, magnetlink, cancel)
 			if err != nil {
 				m.communitiesManager.LogStdout(logMsg, zap.Error(err))
 				return
@@ -968,9 +977,7 @@ func (m *Messenger) HandleHistoryArchiveMagnetlinkMessage(state *ReceivedMessage
 	}
 
 	if downloadTaskInfo.Cancelled {
-					if downloadTaskInfo.TotalDownloadedArchivesCount > 0 {
 		m.communitiesManager.LogStdout(fmt.Sprintf("downloaded %d of %d archives so far", downloadTaskInfo.TotalDownloadedArchivesCount, downloadTaskInfo.TotalArchivesCount))
-					}
 		return
 	}
 
@@ -980,7 +987,7 @@ func (m *Messenger) HandleHistoryArchiveMagnetlinkMessage(state *ReceivedMessage
 importMessageArchivesLoop:
 	for {
 		select {
-					case <-task.Cancel:
+		case <-cancel:
 			m.communitiesManager.LogStdout("interrupted importing history archive messages")
 			return
 		case <-importTicker.C:
@@ -1049,13 +1056,8 @@ func (m *Messenger) HandleHistoryArchiveMagnetlinkMessage(state *ReceivedMessage
 			}
 		}
 	}
-				m.config.messengerSignalsHandler.DownloadingHistoryArchivesFinished(types.EncodeHex(id))
-			}(currentTask)
 
-			return m.communitiesManager.UpdateMagnetlinkMessageClock(id, clock)
+	m.config.messengerSignalsHandler.DownloadingHistoryArchivesFinished(types.EncodeHex(id))
-		}
-	}
-	return nil
 }
 
 func (m *Messenger) HandleCommunityCancelRequestToJoin(state *ReceivedMessageState, signer *ecdsa.PublicKey, cancelRequestToJoinProto protobuf.CommunityCancelRequestToJoin) error {
@@ -1172,8 +1174,41 @@ func (m *Messenger) HandleCommunityRequestToJoinResponse(state *ReceivedMessageS
 			return err
 		}
 		if len(response.Communities()) > 0 {
-			state.Response.AddCommunity(response.Communities()[0])
+			communitySettings := response.CommunitiesSettings()[0]
-			state.Response.AddCommunitySettings(response.CommunitiesSettings()[0])
+			community := response.Communities()[0]
+			state.Response.AddCommunity(community)
+			state.Response.AddCommunitySettings(communitySettings)
+
+			magnetlink := requestToJoinResponseProto.MagnetUri
+			if m.torrentClientReady() && communitySettings != nil && communitySettings.HistoryArchiveSupportEnabled && magnetlink != "" {
+
+				currentTask := m.communitiesManager.GetHistoryArchiveDownloadTask(community.IDString())
+				go func(currentTask *communities.HistoryArchiveDownloadTask) {
+
+					// Cancel ongoing download/import task
+					if currentTask != nil {
+						close(currentTask.Cancel)
+						currentTask.Waiter.Wait()
+					}
+
+					task := &communities.HistoryArchiveDownloadTask{
+						Cancel: make(chan struct{}),
+						Waiter: *new(sync.WaitGroup),
+					}
+					m.communitiesManager.AddHistoryArchiveDownloadTask(community.IDString(), task)
+
+					task.Waiter.Add(1)
+					defer task.Waiter.Done()
+
+					m.downloadHistoryArchiveTasksWaitGroup.Add(1)
+					defer m.downloadHistoryArchiveTasksWaitGroup.Done()
+
+					m.downloadAndImportHistoryArchives(community.ID(), magnetlink, task.Cancel)
+				}(currentTask)
+
+				clock := requestToJoinResponseProto.Community.ArchiveMagnetlinkClock
+				return m.communitiesManager.UpdateMagnetlinkMessageClock(community.ID(), clock)
+			}
 		}
 	}
 

protocol/protobuf/communities.pb.go

@@ -751,6 +751,7 @@ type CommunityRequestToJoinResponse struct {
 	Accepted             bool                  `protobuf:"varint,3,opt,name=accepted,proto3" json:"accepted,omitempty"`
 	Grant                []byte                `protobuf:"bytes,4,opt,name=grant,proto3" json:"grant,omitempty"`
 	CommunityId          []byte                `protobuf:"bytes,5,opt,name=community_id,json=communityId,proto3" json:"community_id,omitempty"`
+	MagnetUri            string                `protobuf:"bytes,6,opt,name=magnet_uri,json=magnetUri,proto3" json:"magnet_uri,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}              `json:"-"`
 	XXX_unrecognized     []byte                `json:"-"`
 	XXX_sizecache        int32                 `json:"-"`
@@ -816,6 +817,13 @@ func (m *CommunityRequestToJoinResponse) GetCommunityId() []byte {
 	return nil
 }
 
+func (m *CommunityRequestToJoinResponse) GetMagnetUri() string {
+	if m != nil {
+		return m.MagnetUri
+	}
+	return ""
+}
+
 type CommunityRequestToLeave struct {
 	Clock                uint64   `protobuf:"varint,1,opt,name=clock,proto3" json:"clock,omitempty"`
 	CommunityId          []byte   `protobuf:"bytes,2,opt,name=community_id,json=communityId,proto3" json:"community_id,omitempty"`
@@ -1258,12 +1266,12 @@ func init() {
 }
 
 var fileDescriptor_f937943d74c1cd8b = []byte{
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+	// 1404 bytes of a gzipped FileDescriptorProto
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+	0x37, 0xa2, 0x54, 0x15, 0x04, 0xfb, 0x81, 0x46, 0x7f, 0xb6, 0xf4, 0x79, 0xb6, 0x47, 0x72, 0x49,
-	0xa0, 0x67, 0x50, 0x8c, 0x5e, 0x90, 0xf1, 0xae, 0xbf, 0x7b, 0x91, 0x8f, 0x5a, 0xa9, 0x11, 0x11,
+	0x8f, 0x58, 0x7f, 0x1a, 0xb0, 0xb9, 0x24, 0x0a, 0xf4, 0x0c, 0x8a, 0xd1, 0x03, 0x33, 0x7e, 0x0a,
-	0xd1, 0xda, 0x4f, 0x00, 0xb6, 0x4e, 0xa0, 0x3a, 0xf5, 0x69, 0xc1, 0x16, 0x7d, 0x38, 0xbd, 0x45,
+	0xdc, 0xbd, 0xc8, 0x47, 0xad, 0xd4, 0x88, 0x88, 0xe8, 0x55, 0x90, 0x00, 0x6c, 0x9d, 0x40, 0x75,
-	0xef, 0xbc, 0xd1, 0x58, 0x92, 0x95, 0xc9, 0x56, 0x7d, 0x5c, 0x7d, 0x5d, 0x6e, 0xdc, 0xfd, 0x34,
+	0xea, 0xd3, 0x82, 0x25, 0xfb, 0x70, 0x7a, 0xc9, 0xde, 0x79, 0xa3, 0xb1, 0x24, 0x2b, 0x93, 0xa5,
-	0xd6, 0x3c, 0x5e, 0xd1, 0xa7, 0xfb, 0xff, 0x06, 0x00, 0x00, 0xff, 0xff, 0x01, 0x61, 0xde, 0x61,
+	0xfb, 0xb8, 0xfa, 0xba, 0xdc, 0xb8, 0xfb, 0x69, 0xac, 0x79, 0xbc, 0xa2, 0x4f, 0xf7, 0xff, 0x0d,
-	0xf9, 0x0e, 0x00, 0x00,
+	0x00, 0x00, 0xff, 0xff, 0x03, 0x37, 0x5b, 0x30, 0x18, 0x0f, 0x00, 0x00,
 }

protocol/protobuf/communities.proto

@@ -99,6 +99,7 @@ message CommunityRequestToJoinResponse {
   bool accepted = 3;
   bytes grant = 4;
   bytes community_id = 5;
+  string magnet_uri = 6;
 }
 
 message CommunityRequestToLeave {