示例#1
0
文件: adapter.go 项目: ycaihua/chat
// TopicCreateP2P given two users creates a p2p topic
func (a *RethinkDbAdapter) TopicCreateP2P(initiator, invited *t.Subscription) error {
	initiator.Id = initiator.Topic + ":" + initiator.User
	// Don't care if the initiator changes own subscription
	_, err := rdb.DB(a.dbName).Table("subscriptions").Insert(initiator, rdb.InsertOpts{Conflict: "replace"}).
		RunWrite(a.conn)
	if err != nil {
		return err
	}

	// Ensure this is a new subscription. If one already exist, don't overwrite it
	invited.Id = invited.Topic + ":" + invited.User
	_, err = rdb.DB(a.dbName).Table("subscriptions").Insert(invited, rdb.InsertOpts{Conflict: "error"}).
		RunWrite(a.conn)
	if err != nil {
		// Is this a duplicate subscription? If so, ifnore it. Otherwise it's a genuine DB error
		if !rdb.IsConflictErr(err) {
			return err
		}
	}

	topic := &t.Topic{
		ObjHeader: t.ObjHeader{Id: initiator.Topic},
		Access:    t.DefaultAccess{Auth: t.ModeP2P, Anon: t.ModeBanned}}
	topic.ObjHeader.MergeTimes(&initiator.ObjHeader)
	return a.TopicCreate(topic)
}
示例#2
0
文件: adapter.go 项目: ycaihua/chat
// UsersForTopic loads users subscribed to the given topic
func (a *RethinkDbAdapter) UsersForTopic(topic string) ([]t.Subscription, error) {
	// Fetch topic subscribers
	// Fetch all subscribed users. The number of users is not large
	q := rdb.DB(a.dbName).Table("subscriptions").GetAllByIndex("Topic", topic).Limit(MAX_RESULTS)
	//log.Printf("RethinkDbAdapter.UsersForTopic q: %+v", q)
	rows, err := q.Run(a.conn)
	if err != nil {
		return nil, err
	}

	// Fetch subscriptions
	var sub t.Subscription
	var subs []t.Subscription
	join := make(map[string]t.Subscription)
	usrq := make([]interface{}, 0, 16)
	for rows.Next(&sub) {
		join[sub.User] = sub
		usrq = append(usrq, sub.User)
	}

	//log.Printf("RethinkDbAdapter.UsersForTopic usrq: %+v, usrq)
	if len(usrq) > 0 {
		subs = make([]t.Subscription, 0, len(usrq))

		// Fetch users by a list of subscriptions
		rows, err = rdb.DB(a.dbName).Table("users").GetAll(usrq...).Run(a.conn)
		if err != nil {
			return nil, err
		}

		var usr t.User
		for rows.Next(&usr) {
			if sub, ok := join[usr.Id]; ok {
				sub.ObjHeader.MergeTimes(&usr.ObjHeader)
				sub.SetPublic(usr.Public)
				subs = append(subs, sub)
			}
		}

		//log.Printf("RethinkDbAdapter.UsersForTopic users: %+v", subs)
	}

	return subs, nil
}
示例#3
0
文件: adapter.go 项目: ycaihua/chat
// SubsForTopic fetches all subsciptions for a topic.
func (a *RethinkDbAdapter) SubsForTopic(topic string) ([]t.Subscription, error) {
	//log.Println("Loading subscriptions for topic ", topic)

	// must load User.Public for p2p topics
	var p2p []t.User
	var err error
	if t.GetTopicCat(topic) == t.TopicCat_P2P {
		uid1, uid2, _ := t.ParseP2P(topic)
		if p2p, err = a.UserGetAll(uid1, uid2); err != nil {
			return nil, err
		} else if len(p2p) != 2 {
			return nil, errors.New("failed to load two p2p users")
		}
	}

	q := rdb.DB(a.dbName).Table("subscriptions").GetAllByIndex("Topic", topic).Limit(MAX_RESULTS)
	//log.Println("Loading subscription q=", q)

	rows, err := q.Run(a.conn)
	if err != nil {
		return nil, err
	}

	var subs []t.Subscription
	var ss t.Subscription
	for rows.Next(&ss) {
		if p2p != nil {
			if p2p[0].Id == ss.User {
				ss.SetPublic(p2p[1].Public)
				ss.SetWith(p2p[1].Id)
			} else {
				ss.SetPublic(p2p[0].Public)
				ss.SetWith(p2p[0].Id)
			}
		}
		subs = append(subs, ss)
		//log.Printf("SubsForTopic: loaded sub %#+v", ss)
	}
	return subs, rows.Err()
}
示例#4
0
文件: adapter.go 项目: ycaihua/chat
// FindSubs returns a list of users who match given tags, such as "email:[email protected]" or "tel:18003287448".
// Just search the 'users.Tags' for the given tags using respective index.
func (a *RethinkDbAdapter) FindSubs(user t.Uid, query []interface{}) ([]t.Subscription, error) {
	// Query may contain redundant records, i.e. the same email twice.
	// User could be matched on multiple tags, i.e on email and phone#. Thus the query may
	// return duplicate users. Thus the need for distinct.
	if rows, err := rdb.DB(a.dbName).Table("users").GetAllByIndex("Tags", query...).Limit(MAX_RESULTS).
		Pluck("Id", "Access", "CreatedAt", "UpdatedAt", "Public", "Tags").Distinct().Run(a.conn); err != nil {
		return nil, err
	} else {
		index := make(map[string]struct{})
		for _, q := range query {
			if tag, ok := q.(string); ok {
				index[tag] = struct{}{}
			}
		}
		var user t.User
		var sub t.Subscription
		var subs []t.Subscription
		for rows.Next(&user) {
			sub.CreatedAt = user.CreatedAt
			sub.UpdatedAt = user.UpdatedAt
			sub.User = user.Id
			sub.ModeWant, sub.ModeGiven = user.Access.Auth, user.Access.Auth
			sub.SetPublic(user.Public)
			tags := make([]string, 0, 1)
			for _, tag := range user.Tags {
				if _, ok := index[tag]; ok {
					tags = append(tags, tag)
				}
			}
			sub.Private = tags
			subs = append(subs, sub)
		}
		if err = rows.Err(); err != nil {
			return nil, err
		}
		return subs, nil
	}
}
示例#5
0
func (SubsObjMapper) Create(sub *types.Subscription) error {
	sub.InitTimes()

	_, err := adaptr.TopicShare([]types.Subscription{*sub})
	return err
}
示例#6
0
// CreateP2P creates a P2P topic by generating two user's subsciptions to each other.
func (TopicsObjMapper) CreateP2P(initiator, invited *types.Subscription) error {
	initiator.InitTimes()
	invited.InitTimes()

	return adaptr.TopicCreateP2P(initiator, invited)
}
示例#7
0
文件: hub.go 项目: ycaihua/chat
// topicInit reads an existing topic from database or creates a new topic
func topicInit(sreg *sessionJoin, h *Hub) {
	var t *Topic

	timestamp := time.Now().UTC().Round(time.Millisecond)

	t = &Topic{name: sreg.topic,
		original:  sreg.pkt.Topic,
		sessions:  make(map[*Session]bool),
		broadcast: make(chan *ServerComMessage, 256),
		reg:       make(chan *sessionJoin, 32),
		unreg:     make(chan *sessionLeave, 32),
		meta:      make(chan *metaReq, 32),
		perUser:   make(map[types.Uid]perUserData),
		exit:      make(chan *shutDown, 1),
	}

	// Request to load a 'me' topic. The topic always axists.
	if t.original == "me" {
		log.Println("hub: loading 'me' topic")

		t.cat = types.TopicCat_Me

		// 'me' has no owner, t.owner = nil

		// Ensure all requests to subscribe are automatically rejected
		t.accessAuth = types.ModeBanned
		t.accessAnon = types.ModeBanned

		user, err := store.Users.Get(sreg.sess.uid)
		if err != nil {
			log.Println("hub: cannot load user object for 'me'='" + t.name + "' (" + err.Error() + ")")
			sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.original, timestamp))
			return
		}

		if err = t.loadSubscribers(); err != nil {
			log.Println("hub: cannot load subscribers for '" + t.name + "' (" + err.Error() + ")")
			sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.original, timestamp))
			return
		}

		t.public = user.Public

		t.created = user.CreatedAt
		t.updated = user.UpdatedAt

		t.lastId = user.SeqId
		t.clearId = user.ClearId

		// Initiate User Agent with the UA of the creating session to report it later
		t.userAgent = sreg.sess.userAgent

		// Request to load a 'find' topic. The topic always exists.
	} else if t.original == "fnd" {
		log.Println("hub: loading 'fnd' topic")

		t.cat = types.TopicCat_Fnd

		// 'fnd' has no owner, t.owner = nil

		// The p2p topic cannot be accessed by anyone but the 2 participants. Access is checked at the session level.
		// Set default access in case user leaves - joins.
		t.accessAuth = types.ModeBanned
		t.accessAnon = types.ModeBanned

		if err := t.loadSubscribers(); err != nil {
			log.Println("hub: cannot load subscribers for '" + t.name + "' (" + err.Error() + ")")
			sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.original, timestamp))
			return
		}

		// Public is not set.
		// t.public = nil

		t.created = t.perUser[sreg.sess.uid].created
		t.updated = t.perUser[sreg.sess.uid].updated

		// Publishing to Find is not supported
		// t.lastId = 0

		// Request to attach to a firehause topic. Must be root.
	} else if t.original == "fh" {
		log.Println("hub: loading 'fh' topic")

		t.cat = types.TopicCat_Fh

		// 'fh' has no owner, t.owner = nil

		// The fh can be accessed by anyone with root access
		// t.accessAuth = types.ModeBanned
		// t.accessAnon = types.ModeBanned

		// Subscriptions are ephemeral, no need to load subscribers.

		// TODO(gene): handle public more intelligently
		// t.public = nil

		// Publishing to Fh is not supported, history is not supported.
		// t.lastId = 0

		// Request to load an existing or create a new p2p topic, then attach to it.
	} else if strings.HasPrefix(t.original, "usr") || strings.HasPrefix(t.original, "p2p") {
		log.Println("hub: loading or creating p2p topic")

		// Handle the following cases:
		// 1. Neither topic nor subscriptions exist: create a new p2p topic & subscriptions.
		// 2. Topic exists, one of the subscriptions is missing:
		// 2.1 Requester's subscription is missing, recreate it.
		// 2.2 Other user's subscription is missing, treat like a new request for user 2.
		// 3. Topic exists, both subscriptions are missing: should not happen, fail.
		// 4. Topic and both subscriptions exist: attach to topic

		t.cat = types.TopicCat_P2P

		// Check if the topic already exists
		stopic, err := store.Topics.Get(t.name)
		if err != nil {
			log.Println("hub: error while loading topic '" + t.name + "' (" + err.Error() + ")")
			sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.name, timestamp))
			return
		}

		// If topic exists, load subscriptions
		var subs []types.Subscription
		if stopic != nil {
			// Subs already have Public swapped
			if subs, err = store.Topics.GetSubs(t.name); err != nil {
				log.Println("hub: cannot load subscritions for '" + t.name + "' (" + err.Error() + ")")
				sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.name, timestamp))
				return
			}

			// Case 3, fail
			if len(subs) == 0 {
				log.Println("hub: missing both subscriptions for '" + t.name + "' (SHOULD NEVER HAPPEN!)")
				sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.name, timestamp))
				return
			}

			t.created = stopic.CreatedAt
			t.updated = stopic.UpdatedAt

			t.lastId = stopic.SeqId
		}

		// t.owner is blank for p2p topics

		// Ensure that other users are automatically rejected
		t.accessAuth = types.ModeP2P
		t.accessAnon = types.ModeBanned

		// t.public is not used for p2p topics since each user get a different public

		// Custom default access levels set in sreg.pkt.Init.DefaultAcs are ignored

		if stopic != nil && len(subs) == 2 {
			// Case 4.

			log.Println("hub: existing p2p topic")

			// t.clearId is not used in P2P topics, may change later

			for i := 0; i < 2; i++ {
				uid := types.ParseUid(subs[i].User)
				t.perUser[uid] = perUserData{
					// Adapter already swapped the public values
					public:  subs[i].GetPublic(),
					private: subs[i].Private,
					// lastSeenTag: subs[i].LastSeen,
					modeWant:  subs[i].ModeWant,
					modeGiven: subs[i].ModeGiven}
			}

		} else {
			// Cases 1, 2

			log.Println("hub: p2p new topic or one of the subs missing")

			var userData perUserData

			// Fetching records for both users.
			// Requester.
			userId1 := sreg.sess.uid
			// The other user.
			userId2 := types.ParseUserId(t.original)
			var u1, u2 int
			users, err := store.Users.GetAll(userId1, userId2)
			if err != nil {
				log.Println("hub: failed to load users for '" + t.name + "' (" + err.Error() + ")")
				sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.name, timestamp))
				return
			} else if len(users) != 2 {
				// Invited user does not exist
				log.Println("hub: missing user for '" + t.name + "'")
				sreg.sess.queueOut(ErrUserNotFound(sreg.pkt.Id, t.name, timestamp))
				return
			} else {
				// User records are unsorted, make sure we know who is who.
				if users[0].Uid() == userId1 {
					u1, u2 = 0, 1
				} else {
					u1, u2 = 1, 0
				}
			}
			// Figure out which subscriptions are missing: User1's, User2's or both.
			var sub1, sub2 *types.Subscription
			// Set to true if only requester's subscription was created
			var user1only bool
			if len(subs) == 1 {
				if subs[0].Uid() == userId1 {
					// User2's subscription is missing
					sub1 = &subs[0]
				} else {
					// User1's is missing
					sub2 = &subs[0]
					user1only = true
				}
			}

			if sub1 == nil {
				if sreg.pkt.Set != nil && sreg.pkt.Set.Desc != nil && !isNullValue(sreg.pkt.Set.Desc.Private) {
					userData.private = sreg.pkt.Set.Desc.Private
					// Init.DefaultAcs and Init.Public are ignored for p2p topics
				}

				// User may set non-default access to topic, just make sure it's no higher than the default
				if sreg.pkt.Set != nil && sreg.pkt.Set.Sub != nil && sreg.pkt.Set.Sub.Mode != "" {
					if err := userData.modeWant.UnmarshalText([]byte(sreg.pkt.Set.Sub.Mode)); err != nil {
						log.Println("hub: invalid access mode for topic '" + t.name + "': '" + sreg.pkt.Set.Sub.Mode + "'")
						userData.modeWant = types.ModeP2P
					} else {
						// FIXME(gene): check for Mode.Banned
						userData.modeWant &= types.ModeP2P
					}
				} else if users[u1].Access.Auth != types.ModeNone {
					userData.modeWant = users[u1].Access.Auth
				} else {
					userData.modeWant = types.ModeP2P
				}

				sub1 = &types.Subscription{
					User:      userId1.String(),
					Topic:     t.name,
					ModeWant:  userData.modeWant,
					ModeGiven: types.ModeP2P,
					Private:   userData.private}
				// Swap Public to match swapped Public in subs returned from store.Topics.GetSubs
				sub1.SetPublic(users[u2].Public)
			}

			if sub2 == nil {
				sub2 = &types.Subscription{
					User:      userId2.String(),
					Topic:     t.name,
					ModeWant:  users[u2].Access.Auth,
					ModeGiven: types.ModeP2P,
					Private:   nil}
				// Swap Public to match swapped Public in subs returned from store.Topics.GetSubs
				sub2.SetPublic(users[u1].Public)
			}

			// Create everything
			if stopic == nil {
				if err = store.Topics.CreateP2P(sub1, sub2); err != nil {
					log.Println("hub: databse error in creating subscriptions '" + t.name + "' (" + err.Error() + ")")
					sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.name, timestamp))
					return
				}

				t.created = sub1.CreatedAt
				t.updated = sub1.UpdatedAt

				// t.lastId is not set (default 0) for new topics

			} else {
				// Recreate one of the subscriptions
				var subToMake *types.Subscription
				if user1only {
					subToMake = sub1
				} else {
					subToMake = sub2
				}
				if err = store.Subs.Create(subToMake); err != nil {
					log.Println("hub: databse error in re-subscribing user '" + t.name + "' (" + err.Error() + ")")
					sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.name, timestamp))
					return
				}
			}

			// t.clearId is not currently used for p2p topics

			// Publics is already swapped
			userData.public = sub1.GetPublic()
			userData.modeWant = sub1.ModeWant
			userData.modeGiven = sub1.ModeGiven
			t.perUser[userId1] = userData

			t.perUser[userId2] = perUserData{
				public:    sub2.GetPublic(),
				modeWant:  sub2.ModeWant,
				modeGiven: sub2.ModeGiven,
			}

			sreg.created = !user1only
		}

		t.original = t.name

		// Processing request to create a new generic (group) topic:
	} else if t.original == "new" {
		log.Println("hub: new group topic")

		t.cat = types.TopicCat_Grp

		// Generic topics have parameters stored in the topic object
		t.owner = sreg.sess.uid

		t.accessAuth = DEFAULT_AUTH_ACCESS
		t.accessAnon = DEFAULT_ANON_ACCESS

		// Owner/creator gets full access to the topic. Owner may change the default modeWant through 'set'.
		userData := perUserData{
			modeGiven: types.ModeFull,
			modeWant:  types.ModeFull}

		if sreg.pkt.Set != nil {
			// User sent initialization parameters
			if sreg.pkt.Set.Desc != nil {
				if !isNullValue(sreg.pkt.Set.Desc.Public) {
					t.public = sreg.pkt.Set.Desc.Public
				}
				if !isNullValue(sreg.pkt.Set.Desc.Private) {
					userData.private = sreg.pkt.Set.Desc.Private
				}

				// set default access
				if sreg.pkt.Set.Desc.DefaultAcs != nil {
					if auth, anon, err := parseTopicAccess(sreg.pkt.Set.Desc.DefaultAcs, t.accessAuth, t.accessAnon); err != nil {
						log.Println("hub: invalid access mode for topic '" + t.name + "': '" + err.Error() + "'")
					} else if auth&types.ModeOwner != 0 || anon&types.ModeOwner != 0 {
						log.Println("hub: OWNER default access in topic '" + t.name)
					} else {
						t.accessAuth, t.accessAnon = auth, anon
					}
				}
			}

			// Owner/creator may restrict own access to topic
			if sreg.pkt.Set.Sub == nil || sreg.pkt.Set.Sub.Mode == "" {
				userData.modeWant = types.ModeFull
			} else {
				if err := userData.modeWant.UnmarshalText([]byte(sreg.pkt.Set.Sub.Mode)); err != nil {
					log.Println("hub: invalid access mode for topic '" + t.name + "': '" + sreg.pkt.Set.Sub.Mode + "'")
				}
			}
		}

		t.perUser[t.owner] = userData

		t.created = timestamp
		t.updated = timestamp

		// t.lastId & t.clearId are not set for new topics

		stopic := &types.Topic{
			ObjHeader: types.ObjHeader{Id: sreg.topic, CreatedAt: timestamp},
			Access:    types.DefaultAccess{Auth: t.accessAuth, Anon: t.accessAnon},
			Public:    t.public}
		// store.Topics.Create will add a subscription record for the topic creator
		stopic.GiveAccess(t.owner, userData.modeWant, userData.modeGiven)
		err := store.Topics.Create(stopic, t.owner, t.perUser[t.owner].private)
		if err != nil {
			log.Println("hub: cannot save new topic '" + t.name + "' (" + err.Error() + ")")
			// Error sent on "new" topic
			sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.original, timestamp))
			return
		}

		t.original = t.name // keeping 'new' as original has no value to the client
		sreg.created = true

	} else {
		log.Println("hub: existing group topic")

		t.cat = types.TopicCat_Grp

		// TODO(gene): check and validate topic name
		stopic, err := store.Topics.Get(t.name)
		if err != nil {
			log.Println("hub: error while loading topic '" + t.name + "' (" + err.Error() + ")")
			sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.original, timestamp))
			return
		} else if stopic == nil {
			log.Println("hub: topic '" + t.name + "' does not exist")
			sreg.sess.queueOut(ErrTopicNotFound(sreg.pkt.Id, t.original, timestamp))
			return
		}

		if err = t.loadSubscribers(); err != nil {
			log.Println("hub: cannot load subscribers for '" + t.name + "' (" + err.Error() + ")")
			sreg.sess.queueOut(ErrUnknown(sreg.pkt.Id, t.original, timestamp))
			return
		}

		// t.owner is set by loadSubscriptions

		t.accessAuth = stopic.Access.Auth
		t.accessAnon = stopic.Access.Anon

		t.public = stopic.Public

		t.created = stopic.CreatedAt
		t.updated = stopic.UpdatedAt

		t.lastId = stopic.SeqId
		t.clearId = stopic.ClearId
	}

	log.Println("hub: topic created or loaded: " + t.name)

	h.topicPut(t.name, t)
	h.topicsLive.Add(1)
	go t.run(h)

	sreg.loaded = true
	// Topic will check access rights, send invite to p2p user, send {ctrl} message to the initiator session
	t.reg <- sreg
}
示例#8
0
文件: adapter.go 项目: ycaihua/chat
// TopicsForUser loads user's contact list: p2p and grp topics, except for 'me' subscription.
func (a *RethinkDbAdapter) TopicsForUser(uid t.Uid) ([]t.Subscription, error) {
	// Fetch user's subscriptions
	// Subscription have Topic.UpdatedAt denormalized into Subscription.UpdatedAt
	q := rdb.DB(a.dbName).Table("subscriptions").GetAllByIndex("User", uid.String()).Limit(MAX_RESULTS)
	//log.Printf("RethinkDbAdapter.TopicsForUser q: %+v", q)
	rows, err := q.Run(a.conn)
	if err != nil {
		return nil, err
	}

	// Fetch subscriptions. Two queries are needed: users table (me & p2p) and topics table (p2p and grp).
	// Prepare a list of Separate subscriptions to users vs topics
	var sub t.Subscription
	join := make(map[string]t.Subscription) // Keeping these to make a join with table for .private and .access
	topq := make([]interface{}, 0, 16)
	usrq := make([]interface{}, 0, 16)
	for rows.Next(&sub) {
		tcat := t.GetTopicCat(sub.Topic)

		// 'me' subscription, skip
		if tcat == t.TopicCat_Me || tcat == t.TopicCat_Fnd {
			continue

			// p2p subscription, find the other user to get user.Public
		} else if tcat == t.TopicCat_P2P {
			uid1, uid2, _ := t.ParseP2P(sub.Topic)
			if uid1 == uid {
				usrq = append(usrq, uid2.String())
			} else {
				usrq = append(usrq, uid1.String())
			}
			topq = append(topq, sub.Topic)

			// grp subscription
		} else {
			topq = append(topq, sub.Topic)
		}
		join[sub.Topic] = sub
	}

	//log.Printf("RethinkDbAdapter.TopicsForUser topq, usrq: %+v, %+v", topq, usrq)
	var subs []t.Subscription
	if len(topq) > 0 || len(usrq) > 0 {
		subs = make([]t.Subscription, 0, len(join))
	}

	if len(topq) > 0 {
		// Fetch grp & p2p topics
		rows, err = rdb.DB(a.dbName).Table("topics").GetAll(topq...).Run(a.conn)
		if err != nil {
			return nil, err
		}

		var top t.Topic
		for rows.Next(&top) {
			sub = join[top.Id]
			sub.ObjHeader.MergeTimes(&top.ObjHeader)
			sub.SetSeqId(top.SeqId)
			sub.SetHardClearId(top.ClearId)
			if t.GetTopicCat(sub.Topic) == t.TopicCat_Grp {
				// all done with a grp topic
				sub.SetPublic(top.Public)
				subs = append(subs, sub)
			} else {
				// put back the updated value of a p2p subsription, will process further below
				join[top.Id] = sub
			}
		}

		//log.Printf("RethinkDbAdapter.TopicsForUser 1: %#+v", subs)
	}

	// Fetch p2p users and join to p2p tables
	if len(usrq) > 0 {
		rows, err = rdb.DB(a.dbName).Table("users").GetAll(usrq...).Run(a.conn)
		if err != nil {
			return nil, err
		}

		var usr t.User
		for rows.Next(&usr) {
			uid2 := t.ParseUid(usr.Id)
			topic := uid.P2PName(uid2)
			if sub, ok := join[topic]; ok {
				sub.ObjHeader.MergeTimes(&usr.ObjHeader)
				sub.SetWith(uid2.UserId())
				sub.SetPublic(usr.Public)
				sub.SetLastSeenAndUA(usr.LastSeen, usr.UserAgent)
				subs = append(subs, sub)
			}
		}

		//log.Printf("RethinkDbAdapter.TopicsForUser 2: %#+v", subs)
	}

	return subs, nil
}