handle Membership

go.mod

@@ -15,7 +15,7 @@ require (
 	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56
 	golang.org/x/net v0.27.0
 	google.golang.org/protobuf v1.34.2
-	maunium.net/go/mautrix v0.19.1-0.20240808174455-5edfcff2b7b6
+	maunium.net/go/mautrix v0.19.1-0.20240809135320-eb84187368b7
 	nhooyr.io/websocket v1.8.11
 )
 

go.sum

@@ -88,7 +88,7 @@ gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 maunium.net/go/mauflag v1.0.0 h1:YiaRc0tEI3toYtJMRIfjP+jklH45uDHtT80nUamyD4M=
 maunium.net/go/mauflag v1.0.0/go.mod h1:nLivPOpTpHnpzEh8jEdSL9UqO9+/KBJFmNRlwKfkPeA=
-maunium.net/go/mautrix v0.19.1-0.20240808174455-5edfcff2b7b6 h1:OGskR/suV/6OGgURhucS8eH5QRyRzw7Wkpf8exrOakk=
-maunium.net/go/mautrix v0.19.1-0.20240808174455-5edfcff2b7b6/go.mod h1:ZWyxoQxRTBxzWIMs0kQCVogZIY0clTu33h102veCT/Q=
+maunium.net/go/mautrix v0.19.1-0.20240809135320-eb84187368b7 h1:xAq4d1rW/5WN7szBtxHNY/63EPNdji+h7FXlLGBUfJU=
+maunium.net/go/mautrix v0.19.1-0.20240809135320-eb84187368b7/go.mod h1:ZWyxoQxRTBxzWIMs0kQCVogZIY0clTu33h102veCT/Q=
 nhooyr.io/websocket v1.8.11 h1:f/qXNc2/3DpoSZkHt1DQu6rj4zGC8JmkkLkWss0MgN0=
 nhooyr.io/websocket v1.8.11/go.mod h1:rN9OFWIUwuxg4fR5tELlYC04bXYowCP9GX47ivo2l+c=

pkg/connector/groupinfo.go

@@ -345,7 +345,9 @@ func (s *SignalClient) catchUpGroup(ctx context.Context, portal *bridgev2.Portal
 		for _, gc := range groupChanges {
 			log.Debug().Uint32("current_rev", gc.GroupChange.Revision).Msg("Processing group change")
 			chatInfoChange := s.groupChangeToChatInfoChange(ctx, gc.GroupChange.Revision, gc.GroupChange)
-			portal.ProcessChatInfoChange(ctx, s.makeEventSender(gc.GroupChange.SourceACI), s.UserLogin, chatInfoChange, time.UnixMilli(int64(ts)))
+			if gc.GroupChange.SourceServiceID.Type == libsignalgo.ServiceIDTypeACI {
+				portal.ProcessChatInfoChange(ctx, s.makeEventSender(gc.GroupChange.SourceServiceID.UUID), s.UserLogin, chatInfoChange, time.UnixMilli(int64(ts)))
+			}
 			if gc.GroupChange.Revision == toRevision {
 				break
 			}

pkg/connector/handlematrix.go

@@ -30,6 +30,7 @@ import (
 	"maunium.net/go/mautrix/bridgev2"
 	"maunium.net/go/mautrix/bridgev2/database"
 	"maunium.net/go/mautrix/bridgev2/networkid"
+	"maunium.net/go/mautrix/event"
 
 	"go.mau.fi/mautrix-signal/pkg/libsignalgo"
 	"go.mau.fi/mautrix-signal/pkg/signalid"
@@ -344,3 +345,130 @@ func (s *SignalClient) HandleMatrixRoomTopic(ctx context.Context, msg *bridgev2.
 		ModifyDescription: &msg.Content.Topic,
 	}, nil)
 }
+
+func (s *SignalClient) HandleMatrixMembership(ctx context.Context, msg *bridgev2.MatrixMembershipChange) (bool, error) {
+	var targetIntent bridgev2.MatrixAPI
+	var targetSignalID uuid.UUID
+	var err error
+	if msg.Portal.RoomType == database.RoomTypeDM {
+		//TODO: this probably needs to revert some changes and clean up the portal on leaves
+		switch msg.Type {
+		case bridgev2.Invite:
+			return false, fmt.Errorf("cannot invite additional user to dm")
+		default:
+			return false, nil
+		}
+	}
+	if msg.TargetGhost != nil {
+		targetIntent = msg.TargetGhost.Intent
+		targetSignalID, err = signalid.ParseUserID(msg.TargetGhost.ID)
+		if err != nil {
+			return false, fmt.Errorf("failed to parse target ghost signal id: %w", err)
+		}
+	} else if msg.TargetUserLogin != nil {
+		targetSignalID, err = signalid.ParseUserLoginID(msg.TargetUserLogin.ID)
+		if err != nil {
+			return false, fmt.Errorf("failed to parse target user signal id: %w", err)
+		}
+		targetIntent = msg.TargetUserLogin.User.DoublePuppet(ctx)
+		if targetIntent == nil {
+			ghost, err := s.Main.Bridge.GetGhostByID(ctx, networkid.UserID(msg.TargetUserLogin.ID))
+			if err != nil {
+				return false, fmt.Errorf("failed to get ghost for user: %w", err)
+			}
+			targetIntent = ghost.Intent
+		}
+	}
+	log := zerolog.Ctx(ctx).With().
+		Str("From Membership", string(msg.Type.From)).
+		Str("To Membership", string(msg.Type.To)).
+		Logger()
+	gc := &signalmeow.GroupChange{}
+	role := signalmeow.GroupMember_DEFAULT
+	if msg.Type.To == event.MembershipInvite || msg.Type == bridgev2.AcceptKnock {
+		levels, err := msg.Portal.Bridge.Matrix.GetPowerLevels(ctx, msg.Portal.MXID)
+		if err != nil {
+			log.Err(err).Msg("Couldn't get power levels")
+			if levels.GetUserLevel(targetIntent.GetMXID()) >= 50 {
+				role = signalmeow.GroupMember_ADMINISTRATOR
+			}
+		}
+	}
+	switch msg.Type {
+	case bridgev2.AcceptInvite:
+		gc.PromotePendingMembers = []*signalmeow.PromotePendingMember{{
+			ACI: targetSignalID,
+		}}
+	case bridgev2.RevokeInvite, bridgev2.RejectInvite:
+		deletePendingMember := libsignalgo.NewACIServiceID(targetSignalID)
+		gc.DeletePendingMembers = []*libsignalgo.ServiceID{&deletePendingMember}
+	case bridgev2.Leave, bridgev2.Kick:
+		gc.DeleteMembers = []*uuid.UUID{&targetSignalID}
+	case bridgev2.Invite:
+		gc.AddMembers = []*signalmeow.AddMember{{
+			GroupMember: signalmeow.GroupMember{
+				ACI:  targetSignalID,
+				Role: role,
+			},
+		}}
+	// TODO: joining and knocking requires a way to obtain the invite link
+	// because the joining/knocking member doesn't have the GroupMasterKey yet
+	// case bridgev2.Join:
+	// 	gc.AddMembers = []*signalmeow.AddMember{{
+	// 		GroupMember: signalmeow.GroupMember{
+	// 			ACI:  targetSignalID,
+	// 			Role: role,
+	// 		},
+	// 		JoinFromInviteLink: true,
+	// 	}}
+	// case bridgev2.Knock:
+	// 	gc.AddRequestingMembers = []*signalmeow.RequestingMember{{
+	// 		ACI:       targetSignalID,
+	// 		Timestamp: uint64(time.Now().UnixMilli()),
+	// 	}}
+	case bridgev2.AcceptKnock:
+		gc.PromoteRequestingMembers = []*signalmeow.RoleMember{{
+			ACI:  targetSignalID,
+			Role: role,
+		}}
+	case bridgev2.RetractKnock, bridgev2.RejectKnock:
+		gc.DeleteRequestingMembers = []*uuid.UUID{&targetSignalID}
+	case bridgev2.BanKnocked, bridgev2.BanInvited, bridgev2.BanJoined, bridgev2.BanLeft:
+		gc.AddBannedMembers = []*signalmeow.BannedMember{{
+			ServiceID: libsignalgo.NewACIServiceID(targetSignalID),
+			Timestamp: uint64(time.Now().UnixMilli()),
+		}}
+		switch msg.Type {
+		case bridgev2.BanJoined:
+			gc.DeleteMembers = []*uuid.UUID{&targetSignalID}
+		case bridgev2.BanInvited:
+			deletePendingMember := libsignalgo.NewACIServiceID(targetSignalID)
+			gc.DeletePendingMembers = []*libsignalgo.ServiceID{&deletePendingMember}
+		case bridgev2.BanKnocked:
+			gc.DeleteRequestingMembers = []*uuid.UUID{&targetSignalID}
+		}
+	case bridgev2.Unban:
+		unbanUser := libsignalgo.NewACIServiceID(targetSignalID)
+		gc.DeleteBannedMembers = []*libsignalgo.ServiceID{&unbanUser}
+	default:
+		log.Debug().Msg("unsupported membership change")
+		return false, nil
+	}
+	_, groupID, err := signalid.ParsePortalID(msg.Portal.ID)
+	if err != nil || groupID == "" {
+		return false, err
+	}
+	gc.Revision = msg.Portal.Metadata.(*signalid.PortalMetadata).Revision + 1
+	revision, err := s.Client.UpdateGroup(ctx, gc, groupID)
+	if err != nil {
+		return false, err
+	}
+	if msg.Type == bridgev2.Invite {
+		err = targetIntent.EnsureJoined(ctx, msg.Portal.MXID)
+		if err != nil {
+			return false, err
+		}
+	}
+	msg.Portal.Metadata.(*signalid.PortalMetadata).Revision = revision
+	return true, nil
+}

pkg/signalid/ids.go

@@ -39,6 +39,14 @@ func ParseUserID(userID networkid.UserID) (uuid.UUID, error) {
 	}
 }
 
+func ParseUserLoginID(userLoginID networkid.UserLoginID) (uuid.UUID, error) {
+	userID, err := uuid.Parse(string(userLoginID))
+	if err != nil {
+		return uuid.Nil, err
+	}
+	return userID, nil
+}
+
 func ParseUserIDAsServiceID(userID networkid.UserID) (libsignalgo.ServiceID, error) {
 	return libsignalgo.ServiceIDFromString(string(userID))
 }

pkg/signalmeow/groups.go

@@ -154,7 +154,7 @@ type RequestingMember struct {
 	Timestamp  uint64
 }
 
-type PromotePendingMembers struct {
+type PromotePendingMember struct {
 	ACI        uuid.UUID
 	ProfileKey libsignalgo.ProfileKey
 }
@@ -178,15 +178,15 @@ type BannedMember struct {
 type GroupChange struct {
 	groupMasterKey types.SerializedGroupMasterKey
 
-	SourceACI                          uuid.UUID
+	SourceServiceID                    libsignalgo.ServiceID
 	Revision                           uint32
 	AddMembers                         []*AddMember
 	DeleteMembers                      []*uuid.UUID
 	ModifyMemberRoles                  []*RoleMember
 	ModifyMemberProfileKeys            []*ProfileKeyMember
 	AddPendingMembers                  []*PendingMember
 	DeletePendingMembers               []*libsignalgo.ServiceID
-	PromotePendingMembers              []*GroupMember
+	PromotePendingMembers              []*PromotePendingMember
 	ModifyTitle                        *string
 	ModifyAvatar                       *string
 	ModifyDisappearingMessagesDuration *uint32
@@ -862,9 +862,9 @@ func (cli *Client) decryptGroupChange(ctx context.Context, encryptedGroupChange
 		return nil, fmt.Errorf("wrong serviceid kind: expected aci, got pni")
 	}
 	decryptedGroupChange := &GroupChange{
-		groupMasterKey: groupMasterKey,
-		Revision:       encryptedActions.Revision,
-		SourceACI:      sourceServiceID.UUID,
+		groupMasterKey:  groupMasterKey,
+		Revision:        encryptedActions.Revision,
+		SourceServiceID: sourceServiceID,
 	}
 
 	if encryptedActions.ModifyTitle != nil {
@@ -992,7 +992,7 @@ func (cli *Client) decryptGroupChange(ctx context.Context, encryptedGroupChange
 		if err != nil {
 			return nil, err
 		}
-		decryptedGroupChange.PromotePendingMembers = append(decryptedGroupChange.PromotePendingMembers, &GroupMember{
+		decryptedGroupChange.PromotePendingMembers = append(decryptedGroupChange.PromotePendingMembers, &PromotePendingMember{
 			ACI:        *aci,
 			ProfileKey: *profileKey,
 		})