Hosted rooms: seats, owner-first room IDs, T5 items in their scenes

- The seat chosen on joining, and "*msg SeatAssignment" room seats, go to the hub, so people joining get
  free seats (both stood on seat 1).
- Instance IDs are "<owner>-<2100000000+n>" (the hub's change): the client takes the owner from them, so
  owners can decorate their rooms.
- A hosted room's scene carries community products as the hub's IDs (placements too), turned into local
  IDs by each proxy, instead of being stripped; saved and loaded scenes translate placements too.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

internal/hosted/hosted.go

@@ -3,7 +3,7 @@
 // (XML-RPC), serves their IMQ queues (subscriptions answered here, messages to and from the hub), and adds them to
 // the room list. IMVU never hears of them.
 //
-// A hosted room has a number n; its instance ID is "2100000000-<n>" and its chat ID 2100000000+n.
+// A hosted room has a number n; its instance ID is "<owner's IMVU ID>-<2100000000+n>" and its chat ID 2100000000+n.
 package hosted
 
 import (
@@ -94,7 +94,8 @@ type joinAnswer struct {
 	Message      string        `json:"message"`
 }
 
-var instancePattern = regexp.MustCompile(`^` + strconv.Itoa(Base) + `-([1-9][0-9]{0,8})$`)
+// A hosted room's instance ID is "<owner's IMVU ID>-<Base + n>": the client takes the owner from the first part.
+var instancePattern = regexp.MustCompile(`^[1-9][0-9]{0,11}-([0-9]{10})$`)
 
 // RoomNumber is the hosted room an instance ID names.
 func RoomNumber(instance string) (int64, bool) {
@@ -102,8 +103,11 @@ func RoomNumber(instance string) (int64, bool) {
 	if m == nil {
 		return 0, false
 	}
-	n, err := strconv.ParseInt(m[1], 10, 64)
+	number, err := strconv.ParseInt(m[1], 10, 64)
-	return n, err == nil && n < 2147483647-Base
+	if err != nil {
+		return 0, false
+	}
+	return ChatRoom(number) // the same range as chat IDs
 }
 
 // ChatRoom is the hosted room a chat ID belongs to.
@@ -114,7 +118,10 @@ func ChatRoom(chat int64) (int64, bool) {
 	return chat - Base, true
 }
 
-func instanceOf(n int64) string { return fmt.Sprintf("%d-%d", Base, n) }
+func instanceID(owner, n int64) string { return fmt.Sprintf("%d-%d", owner, Base+n) }
+
+// instanceOf is a room's instance ID, with its owner as last looked up (under mu).
+func (r *Rooms) instanceOfLocked(n int64) string { return instanceID(r.owners[n], n) }
 
 // queueRoom is the hosted room a queue belongs to, and which of its queues it is: "chat", "node" (the room's
 // inv:/room/room-<instance>) or "occupancy" (room_occupancy/<instance>).
@@ -232,7 +239,7 @@ func (r *Rooms) roomLocked(n int64) *room {
 	}
 	rm, ok := r.rooms[n]
 	if !ok {
-		rm = &room{chat: Base + n, instance: instanceOf(n), conns: map[*proxy.IMQConn]bool{}}
+		rm = &room{chat: Base + n, instance: r.instanceOfLocked(n), conns: map[*proxy.IMQConn]bool{}}
 		r.rooms[n] = rm
 	}
 	return rm
@@ -356,7 +363,7 @@ func (r *Rooms) Closed(c *proxy.IMQConn) {
 
 // Send sends what the client said or did in a hosted room to the hub (the client's message has already had its
 // community products taken out, as in IMVU's rooms). It reports whether the queue was a hosted room's.
-func (r *Rooms) Send(queue, mount string, message []byte) bool {
+func (r *Rooms) Send(queue, mount string, message, original []byte, keep bool) bool {
 	n, kind, ok := queueRoom(queue)
 	if !ok {
 		return false
@@ -364,13 +371,16 @@ func (r *Rooms) Send(queue, mount string, message []byte) bool {
 	if kind != "chat" {
 		return true // nothing to say on the others
 	}
+	// (No echo of the client's own messages: the client handles them as it sends them, and ignores IMVU's.)
+	if keep {
+		return true
+	}
 	if mount == "messages" {
-		// Sitting down: "*seat <n>" in the chat text.
 		var m struct {
 			Message string `json:"message"`
 		}
-		if json.Unmarshal(message, &m) == nil && strings.HasPrefix(m.Message, "*seat ") {
+		if json.Unmarshal(message, &m) == nil {
-			if seat, err := strconv.Atoi(strings.TrimSpace(strings.TrimPrefix(m.Message, "*seat "))); err == nil && seat >= 0 && seat < 100 {
+			if seat, ok := roomSeat(m.Message, r.user()); ok {
 				r.Hub.Send(map[string]any{"type": "room.seat", "room": n, "seat": seat})
 			}
 		}
@@ -379,8 +389,28 @@ func (r *Rooms) Send(queue, mount string, message []byte) bool {
 	return true
 }
 
+// roomSeat is the room seat a chat line takes: "*seat <n>", or "*msg SeatAssignment <kind> <user> <seat> 0" from
+// the client's own user (a seat of the room itself; seats on furniture, with a furniture instance ID, aren't the
+// room's). The hub keeps them so people joining get free seats.
+func roomSeat(text string, me int64) (int, bool) {
+	f := strings.Fields(text)
+	var s string
+	switch {
+	case len(f) == 2 && f[0] == "*seat":
+		s = f[1]
+	case len(f) == 6 && f[0] == "*msg" && f[1] == "SeatAssignment" && f[3] == strconv.FormatInt(me, 10) && f[5] == "0":
+		s = f[4]
+	default:
+		return 0, false
+	}
+	seat, err := strconv.Atoi(s)
+	return seat, err == nil && seat >= 0 && seat < 100
+}
+
 // --- HTTP: XML-RPC, the participant post and the room list ---
 
+var namedRoomPattern = regexp.MustCompile(`([1-9][0-9]{0,11}-21[0-9]{8})(?:[^0-9]|$)`)
+
 var participantPath = regexp.MustCompile(`^/chat/chat-([0-9]+)/participants/`)
 
 // Intercept answers the client's calls about hosted rooms (proxy.Interceptor). It goes before the products'.
@@ -424,7 +454,12 @@ func (r *Rooms) Intercept(x *proxy.Exchange) error {
 // chat ID of a room the client is in): IMVU doesn't know them, and needn't hear of them.
 func (r *Rooms) keepFromIMVU(x *proxy.Exchange) {
 	text := x.URL.Path + "?" + x.URL.RawQuery + " " + string(x.Body)
-	named := strings.Contains(text, strconv.Itoa(Base)+"-")
+	named := false
+	for _, m := range namedRoomPattern.FindAllStringSubmatch(text, -1) {
+		if _, ok := RoomNumber(m[1]); ok {
+			named = true
+		}
+	}
 	if !named {
 		r.mu.Lock()
 		for _, rm := range r.rooms {
@@ -594,6 +629,7 @@ func (r *Rooms) roomState(ctx context.Context, n int64) *http.Response {
 				continue // a community product that isn't here
 			}
 			product = local
+			placement = swapToken(placement, p, strconv.FormatInt(local, 10))
 		default:
 			continue
 		}
@@ -606,7 +642,7 @@ func (r *Rooms) roomState(ctx context.Context, n int64) *http.Response {
 		{Name: "room_state", Value: xmlrpc.Struct{
 			{Name: "room_info", Value: xmlrpc.Struct{
 				{Name: "customers_id", Value: strconv.FormatInt(rm.OwnerImvuID, 10)},
-				{Name: "room_instance_id", Value: instanceOf(n)},
+				{Name: "room_instance_id", Value: instanceID(rm.OwnerImvuID, n)},
 				{Name: "room_pid", Value: strconv.FormatInt(rm.RoomPid, 10)},
 			}},
 			{Name: "room_contents", Value: items},
@@ -640,6 +676,7 @@ func (r *Rooms) saveRoomState(ctx context.Context, n int64, args xmlrpc.Struct)
 				continue
 			}
 			p = id
+			placement = swapToken(placement, strconv.FormatInt(product, 10), id)
 		}
 		contents = append(contents, [3]any{furni, p, placement})
 	}
@@ -687,6 +724,8 @@ func (r *Rooms) joinChat(ctx context.Context, n int64) *http.Response {
 	for taken[seat] {
 		seat++
 	}
+	// Taken now, so whoever joins next gets another.
+	r.Hub.Send(map[string]any{"type": "room.seat", "room": n, "seat": seat})
 	r.mu.Lock()
 	r.last = n
 	_, known := r.owners[n]
@@ -695,7 +734,10 @@ func (r *Rooms) joinChat(ctx context.Context, n int64) *http.Response {
 		r.getRoom(ctx, n) // its owner, for the room's products
 	}
 	if r.OnJoin != nil {
-		r.OnJoin(strconv.FormatInt(a.Chat, 10), instanceOf(n))
+		r.mu.Lock()
+		instance := r.instanceOfLocked(n)
+		r.mu.Unlock()
+		r.OnJoin(strconv.FormatInt(a.Chat, 10), instance)
 	}
 	r.logf("hosted: in room %d (chat %d)", n, a.Chat)
 	return xmlrpcAnswer(xmlrpc.Struct{
@@ -769,8 +811,8 @@ func appendRoom(list map[string]json.RawMessage, rm Room) {
 		adult = "1"
 	}
 	known := map[string]any{
-		"customers_room_id": strconv.FormatInt(rm.N, 10), "customers_id": strconv.Itoa(Base),
+		"customers_room_id": strconv.FormatInt(Base+rm.N, 10), "customers_id": strconv.FormatInt(rm.OwnerImvuID, 10),
-		"room_instance_id": instanceOf(rm.N), "name": plain(rm.Name), "customers_name": plain(rm.OwnerName),
+		"room_instance_id": instanceID(rm.OwnerImvuID, rm.N), "name": plain(rm.Name), "customers_name": plain(rm.OwnerName),
 		"num_participants": strconv.Itoa(rm.Occupancy), "max_users": strconv.Itoa(rm.MaxUsers),
 		"description": plain(rm.Description), "image_url": "", "rating": "0", "language": "", "is_ap": adult,
 		"is_av": "0", "is_vip": "0", "participants": []any{},
@@ -825,3 +867,14 @@ func plain(s string) string {
 		return c
 	}, s)
 }
+
+// swapToken replaces a whole space-separated token of a placement (which names its own product).
+func swapToken(placement, from, to string) string {
+	fields := strings.Split(placement, " ")
+	for i, f := range fields {
+		if f == from {
+			fields[i] = to
+		}
+	}
+	return strings.Join(fields, " ")
+}

internal/hosted/hosted_test.go

@@ -51,7 +51,7 @@ func (h *fakeHub) Call(ctx context.Context, method, path string, body, out any)
 			"roomPid": 50168116, "rating": "general", "maxUsers": 10, "occupancy": 2},
 			"scene": {"contents": [[1, 47477426, "37207-46"], [2, "coatcoat22", "37-11"], [3, "notherenn2", "37-12"]], "hash": "h1"}}`), out)
 	case method == "GET" && path == "/api/v1/hosted-rooms":
-		return json.Unmarshal([]byte(`{"rooms": [{"n": 3, "name": "Lounge", "ownerName": "Erin", "maxUsers": 10, "occupancy": 2}]}`), out)
+		return json.Unmarshal([]byte(`{"rooms": [{"n": 3, "name": "Lounge", "ownerImvuId": 88, "ownerName": "Erin", "maxUsers": 10, "occupancy": 2}]}`), out)
 	case method == "PUT" && path == "/api/v1/hosted-rooms/3/scene":
 		h.mu.Lock()
 		h.scene = append(h.scene, body)
@@ -132,15 +132,15 @@ func TestHostedRoom(t *testing.T) {
 	}
 
 	// Joining: the hub lets the client in; it sits in the first free seat.
-	resp, _ := xmlrpcCall(t, r, "chat.imvu.com", "chat.getOrMakeChat", xmlrpc.Struct{{Name: "activity", Value: "publicroom-2100000000-3"}})
+	resp, _ := xmlrpcCall(t, r, "chat.imvu.com", "chat.getOrMakeChat", xmlrpc.Struct{{Name: "activity", Value: "publicroom-88-2100000003"}})
 	if get(resp.Params[0], "chatId") != int64(2100000003) || get(resp.Params[0], "seat") != int64(1) || get(resp.Params[0], "lastMessageId") != int64(4) {
 		t.Fatalf("join answer %v", resp.Params[0])
 	}
-	if len(*events) != 1 || (*events)[0] != "join 2100000003 2100000000-3" {
+	if len(*events) != 1 || (*events)[0] != "join 2100000003 88-2100000003" {
 		t.Fatalf("events %v", *events)
 	}
 	// A full room: the client is told why.
-	if resp, _ := xmlrpcCall(t, r, "chat.imvu.com", "chat.getOrMakeChat", xmlrpc.Struct{{Name: "activity", Value: "publicroom-2100000000-9"}}); resp.Fault == nil || resp.Fault.String != "This room is full." {
+	if resp, _ := xmlrpcCall(t, r, "chat.imvu.com", "chat.getOrMakeChat", xmlrpc.Struct{{Name: "activity", Value: "publicroom-88-2100000009"}}); resp.Fault == nil || resp.Fault.String != "This room is full." {
 		t.Fatalf("full room: %+v", resp)
 	}
 
@@ -168,10 +168,13 @@ func TestHostedRoom(t *testing.T) {
 	}
 
 	// Chat goes to the hub; sitting down too.
-	if !r.Send("/chat/2100000003", "messages", []byte(`{"message": "*seat 2", "userId": 7}`)) || r.Send("/chat/1385863547", "messages", []byte(`{}`)) {
+	if !r.Send("/chat/2100000003", "messages", []byte(`{"message": "*seat 2", "userId": 7}`), []byte(`{"message": "*seat 2", "userId": 7}`), false) || r.Send("/chat/1385863547", "messages", []byte(`{}`), []byte(`{}`), false) {
 		t.Fatal("Send's answer")
 	}
-	if seats, sends := h.sentOf("room.seat"), h.sentOf("room.send"); len(seats) != 1 || seats[0]["seat"] != 2 || len(sends) != 1 {
+	r.Send("/chat/2100000003", "messages", []byte(`{"message": "*msg SeatAssignment 0 7 3 0", "userId": 7}`), nil, false)
+	r.Send("/chat/2100000003", "messages", []byte(`{"message": "*msg SeatAssignment 0 7 1 5521", "userId": 7}`), nil, false) // on furniture
+	// The seat chosen on joining (1), "*seat 2", and the room seat 3.
+	if seats, sends := h.sentOf("room.seat"), h.sentOf("room.send"); len(seats) != 3 || seats[0]["seat"] != 1 || seats[1]["seat"] != 2 || seats[2]["seat"] != 3 || len(sends) != 3 {
 		t.Fatalf("seats %v, sends %v", seats, sends)
 	}
 
@@ -188,17 +191,17 @@ func TestHostedRoom(t *testing.T) {
 	}
 
 	// The room's card and scene come from the hub; the scene's community products as local IDs (missing ones left out).
-	resp, _ = xmlrpcCall(t, r, "client-dynamic.imvu.com", "test.getRoomCardInfo", xmlrpc.Struct{{Name: "room_instance_id", Value: "2100000000-3"}})
+	resp, _ = xmlrpcCall(t, r, "client-dynamic.imvu.com", "test.getRoomCardInfo", xmlrpc.Struct{{Name: "room_instance_id", Value: "88-2100000003"}})
 	if get(resp.Params[0], "name") != "Lounge b" || get(resp.Params[0], "owner_cid") != int64(88) {
 		t.Fatalf("card %v", resp.Params[0])
 	}
-	resp, _ = xmlrpcCall(t, r, "client-dynamic.imvu.com", "test.getRoomState", xmlrpc.Struct{{Name: "room_instance_id", Value: "2100000000-3"}})
+	resp, _ = xmlrpcCall(t, r, "client-dynamic.imvu.com", "test.getRoomState", xmlrpc.Struct{{Name: "room_instance_id", Value: "88-2100000003"}})
 	contents := get(get(resp.Params[0], "room_state"), "room_contents").([]xmlrpc.Value)
 	if len(contents) != 2 || fmt.Sprint(contents[1]) != "[2 2000000005 37-11]" || get(get(get(resp.Params[0], "room_state"), "room_info"), "room_pid") != "50168116" {
 		t.Fatalf("scene %v", resp.Params[0])
 	}
 	// Saving the scene: community products as the hub's IDs.
-	xmlrpcCall(t, r, "client-dynamic.imvu.com", "test.setRoomState", xmlrpc.Struct{{Name: "room_instance_id", Value: "2100000000-3"},
+	xmlrpcCall(t, r, "client-dynamic.imvu.com", "test.setRoomState", xmlrpc.Struct{{Name: "room_instance_id", Value: "88-2100000003"},
 		{Name: "room_contents", Value: []xmlrpc.Value{[]xmlrpc.Value{int64(1), int64(47477426), "37-1"}, []xmlrpc.Value{int64(2), int64(2000000005), "37-2"}}}})
 	if b, _ := json.Marshal(h.scene); string(b) != `[{"contents":[[1,47477426,"37-1"],[2,"coatcoat22","37-2"]]}]` {
 		t.Fatalf("saved %s", b)
@@ -214,7 +217,7 @@ func TestHostedRoom(t *testing.T) {
 	}
 
 	// Anything else naming a hosted room is answered here, not sent to IMVU.
-	for _, raw := range []string{"https://api.imvu.com/room/room-2100000000-3", "https://client-dynamic.imvu.com/api/rooms/room_rating.php?room_instance_id=2100000000-3",
+	for _, raw := range []string{"https://api.imvu.com/room/room-88-2100000003", "https://client-dynamic.imvu.com/api/rooms/room_rating.php?room_instance_id=88-2100000003",
 		"https://client-dynamic.imvu.com/api/whatever.php?chat=2100000003"} {
 		u, _ := url.Parse(raw)
 		req, _ := http.NewRequest("GET", u.String(), nil)
@@ -245,7 +248,7 @@ func TestRoomList(t *testing.T) {
 	}
 	var l map[string]any
 	json.Unmarshal(out, &l)
-	if fmt.Sprint(l["customers_room_id"]) != "[644 3]" || fmt.Sprint(l["customers_id"]) != "[1 2100000000]" ||
+	if fmt.Sprint(l["customers_room_id"]) != "[644 2100000003]" || fmt.Sprint(l["customers_id"]) != "[1 88]" ||
 		fmt.Sprint(l["num_participants"]) != "[4 2]" || fmt.Sprint(l["odd"]) != "[map[x:1] map[]]" || l["number_of_rooms"] != float64(1) {
 		t.Fatalf("list %s", out)
 	}

internal/products/decor.go

@@ -17,6 +17,7 @@ import (
 	"encoding/json"
 	"io"
 	"net/http"
+	"regexp"
 	"strconv"
 	"strings"
 	"sync"
@@ -135,7 +136,9 @@ func roomOwner(instance string) int64 {
 
 // isHostedInstance reports whether a room is hosted by the hub (its scene is the hosted package's).
 func isHostedInstance(instance string) bool {
-	return strings.HasPrefix(instance, strconv.Itoa(HostedOwnerID)+"-")
+	_, number, ok := strings.Cut(instance, "-")
+	n, err := strconv.ParseInt(number, 10, 64)
+	return ok && err == nil && n > HostedOwnerID // hosted rooms' numbers start above 2100000000
 }
 
 // decorFetch gets a room's decorations, from memory or the hub.
@@ -452,6 +455,16 @@ func (p *Products) outgoingScene(m *chatMessage) ([]byte, bool) {
 	}
 	holder, rows := sceneContents(scene)
 	instance := sceneInstance(scene)
+	if isHostedInstance(instance) {
+		// A hosted room's scene goes only to T5DE users (through the hub): its community products travel as the
+		// hub's product IDs, which each proxy turns into its own local IDs.
+		out, changed := p.globalScene(rows)
+		if !changed {
+			return nil, false
+		}
+		holder["room_contents"] = out
+		return m.withText(setRoomStateCommand + encodeScene(scene)), true
+	}
 	rest, items, stripped := p.splitCommunity(rows)
 	_, hadDecor := p.decor.get(instance)
 	if instance != "" && !isHostedInstance(instance) && (stripped > 0 || hadDecor) {
@@ -544,7 +557,16 @@ func (p *Products) incomingScene(m *chatMessage) ([]byte, bool) {
 // decorateScene adds the room's decorations to a scene IMVU sent: the scene encoded again, and whether it changed.
 func (p *Products) decorateScene(scene map[string]any) (string, bool) {
 	instance := sceneInstance(scene)
-	if instance == "" || isHostedInstance(instance) {
+	if isHostedInstance(instance) {
+		holder, rows := sceneContents(scene)
+		out, changed := p.localScene(rows)
+		if !changed {
+			return "", false
+		}
+		holder["room_contents"] = out
+		return encodeScene(scene), true
+	}
+	if instance == "" {
 		return "", false
 	}
 	holder, rows := sceneContents(scene)
@@ -610,3 +632,58 @@ func (p *Products) DecorChanged(instance string) {
 	}
 	p.logf("decor: gave the client %s again with its decorations", instance)
 }
+
+// globalScene gives a hosted room's community products as the hub's product IDs (in the row and its placement); a
+// local pack's can't be shared and is left out.
+func (p *Products) globalScene(rows []any) ([]any, bool) {
+	out, changed := make([]any, 0, len(rows)), false
+	for _, row := range rows {
+		r, ok := row.([]any)
+		product, isNumber := int64(0), false
+		if ok && len(r) >= 3 {
+			product, isNumber = numberOf(r[1])
+		}
+		if !isNumber || !IsCommunity(product) {
+			out = append(out, row)
+			continue
+		}
+		changed = true
+		id, ok := p.state.productID(product)
+		if !ok || !p.inHubDir(id) {
+			continue
+		}
+		placement, _ := r[2].(string)
+		out = append(out, []any{r[0], id, swapToken(placement, strconv.FormatInt(product, 10), id)})
+	}
+	return out, changed
+}
+
+// localScene turns hub product IDs in a hosted room's scene into local IDs (asking for products that aren't here).
+func (p *Products) localScene(rows []any) ([]any, bool) {
+	out, changed := make([]any, 0, len(rows)), false
+	for _, row := range rows {
+		r, ok := row.([]any)
+		if !ok || len(r) < 3 {
+			out = append(out, row)
+			continue
+		}
+		id, isString := r[1].(string)
+		if !isString || !hubIDPattern.MatchString(id) {
+			out = append(out, row)
+			continue
+		}
+		changed = true
+		local, ok := p.LocalID(id)
+		if !ok {
+			if p.Want != nil {
+				p.Want(id)
+			}
+			continue
+		}
+		placement, _ := r[2].(string)
+		out = append(out, []any{r[0], local, swapToken(placement, id, strconv.FormatInt(local, 10))})
+	}
+	return out, changed
+}
+
+var hubIDPattern = regexp.MustCompile(`^[a-z2-7]{10}$`)

internal/products/decor_test.go

@@ -144,3 +144,30 @@ func TestDecorationsInServerRoomState(t *testing.T) {
 		t.Fatalf("delivered %s", in)
 	}
 }
+
+// In a hosted room, community products travel as the hub's IDs and come back as local IDs.
+func TestHostedRoomScene(t *testing.T) {
+	h, _ := newHarness(t)
+	hubDir := t.TempDir()
+	writePack(t, hubDir, "sofasofa22", 1)
+	h.p.dirs = append(h.p.dirs, hubDir)
+	h.p.HubDir = hubDir
+	h.p.refresh(true)
+	sofa := h.p.byProductID("sofasofa22").local
+	scene := map[string]any{"room_state": map[string]any{
+		"room_info":     map[string]any{"room_instance_id": "7-2100000003"},
+		"room_contents": []any{[]any{10, 301, "2-1"}, []any{11, sofa, fmt.Sprintf("3 0 11 %d 6", sofa)}}}}
+	msg, _ := json.Marshal(map[string]any{"userId": 7, "message": setRoomStateCommand + encodeScene(scene)})
+	out, _ := h.p.outgoing("/chat/2100000003", "messages", msg)
+	m, _ := parseChatMessage(out)
+	sent, _ := decodeScene(strings.TrimPrefix(m.text, setRoomStateCommand))
+	if _, rows := sceneContents(sent); fmt.Sprint(rows) != "[[10 301 2-1] [11 sofasofa22 3 0 11 sofasofa22 6]]" {
+		t.Fatalf("sent %v", rows)
+	}
+	in := h.p.Incoming(nil, imq.Delivered{UserID: "7", Queue: "/chat/2100000003", Mount: "messages", Message: out})
+	m, _ = parseChatMessage(in)
+	got, _ := decodeScene(strings.TrimPrefix(m.text, setRoomStateCommand))
+	if _, rows := sceneContents(got); fmt.Sprint(rows) != fmt.Sprintf("[[10 301 2-1] [11 %d 3 0 11 %d 6]]", sofa, sofa) {
+		t.Fatalf("delivered %v", rows)
+	}
+}

internal/products/intercept.go

@@ -571,7 +571,7 @@ func (p *Products) interceptBaseLook(x *proxy.Exchange) error {
 func (p *Products) Outgoing(queue, mount string, message []byte) ([]byte, bool) {
 	out, drop := p.outgoing(queue, mount, message)
 	// A hosted room's message goes to the hub (without community products, as to IMVU), never to IMVU.
-	if p.Hosted != nil && !drop && p.Hosted.Send(queue, mount, out) {
+	if p.Hosted != nil && p.Hosted.Send(queue, mount, out, message, drop) {
 		return nil, true
 	}
 	return out, drop

internal/products/products.go

@@ -115,10 +115,11 @@ func (p *Products) Ready(id string) {
 const HostedOwnerID = 2100000000
 
 // HostedRooms serves T5DE-hosted rooms' IMQ queues: Route answers subscriptions to them, Send takes the client's
-// messages to them (reporting whether the queue was one), Closed forgets a connection.
+// messages to them (message as for others, original as the client sent it, for the echo; keep: nothing to send
+// others), reporting whether the queue was one; Closed forgets a connection.
 type HostedRooms interface {
 	Route(c *proxy.IMQConn, unsubscribe bool, s imq.Subscription) imq.Subscription
-	Send(queue, mount string, message []byte) bool
+	Send(queue, mount string, message, original []byte, keep bool) bool
 	Closed(c *proxy.IMQConn)
 }