fix: sync latest Android and langpack updates

README.md

@@ -139,6 +139,10 @@ Recommended checks:
 - Check server logs for no new `NOT_IMPLEMENTED`, `Unhandled RPC`, `bad_msg`,
   panic, or internal errors.
 
+## Contributors
+
+- [ajarshia](https://github.com/ajarshia) - Android Persian (`fa`) language pack.
+
 ## Repository Layout
 
 ```text

README.zh-CN.md

@@ -121,6 +121,10 @@ Start-Process $tdesktop -ArgumentList @("-workdir", "$PWD\.tdata-bob")
 - 同一账号多 session 登录，确认当前 session 不重复 echo，其它在线 session 能收到 updates。
 - 检查 server 日志没有新增 `NOT_IMPLEMENTED`、`Unhandled RPC`、`bad_msg`、panic 或 internal error。
 
+## 贡献者
+
+- [ajarshia](https://github.com/ajarshia) - Android Persian (`fa`) 语言包。
+
 ## 仓库结构
 
 ```text

internal/app/bots/botfather.go

@@ -128,7 +128,7 @@ func (s *Service) sendServiceBotReply(ctx context.Context, botUserID, userID int
 		RecipientUserID:  userID,
 		RandomID:         s.botReplyRandomID(),
 		Message:          reply.Text,
-		Entities:         reply.Entities,
+		Entities:         serviceBotReplyEntities(reply.Text, reply.Entities),
 		Date:             int(s.now().Unix()),
 		RecipientBlocked: blocked,
 	}); err != nil {

internal/app/bots/service_bot_entities.go

@@ -0,0 +1,182 @@
+package bots
+
+import (
+	"sort"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+
+	"telesrv/internal/domain"
+)
+
+type serviceBotEntitySpan struct {
+	start int
+	end   int
+}
+
+func serviceBotReplyEntities(text string, explicit []domain.MessageEntity) []domain.MessageEntity {
+	if text == "" && len(explicit) == 0 {
+		return nil
+	}
+	out := append([]domain.MessageEntity(nil), explicit...)
+	occupied := make([]serviceBotEntitySpan, 0, len(out)+8)
+	for _, entity := range out {
+		if entity.Length <= 0 {
+			continue
+		}
+		occupied = append(occupied, serviceBotEntitySpan{start: entity.Offset, end: entity.Offset + entity.Length})
+	}
+	appendEntity := func(entity domain.MessageEntity) {
+		if entity.Length <= 0 || len(out) >= domain.MaxMessageEntityCount {
+			return
+		}
+		span := serviceBotEntitySpan{start: entity.Offset, end: entity.Offset + entity.Length}
+		if serviceBotSpanOverlaps(span, occupied) {
+			return
+		}
+		out = append(out, entity)
+		occupied = append(occupied, span)
+	}
+	for _, span := range serviceBotURLByteSpans(text) {
+		offset, length := utf16Range(text, span.start, span.end)
+		appendEntity(domain.MessageEntity{Type: domain.MessageEntityURL, Offset: offset, Length: length})
+	}
+	for _, span := range serviceBotCommandByteSpans(text) {
+		offset, length := utf16Range(text, span.start, span.end)
+		appendEntity(domain.MessageEntity{Type: domain.MessageEntityBotCommand, Offset: offset, Length: length})
+	}
+	sort.SliceStable(out, func(i, j int) bool {
+		if out[i].Offset != out[j].Offset {
+			return out[i].Offset < out[j].Offset
+		}
+		return out[i].Length < out[j].Length
+	})
+	return out
+}
+
+func serviceBotURLByteSpans(text string) []serviceBotEntitySpan {
+	var spans []serviceBotEntitySpan
+	for i := 0; i < len(text); {
+		if !strings.HasPrefix(text[i:], "https://") && !strings.HasPrefix(text[i:], "http://") {
+			_, size := utf8.DecodeRuneInString(text[i:])
+			i += size
+			continue
+		}
+		start := i
+		i += len("http://")
+		if strings.HasPrefix(text[start:], "https://") {
+			i = start + len("https://")
+		}
+		for i < len(text) {
+			r, size := utf8.DecodeRuneInString(text[i:])
+			if unicode.IsSpace(r) || r == '<' || r == '>' {
+				break
+			}
+			i += size
+		}
+		end := trimServiceBotURLTrailingPunctuation(text, start, i)
+		if end > start {
+			spans = append(spans, serviceBotEntitySpan{start: start, end: end})
+		}
+		if i == start {
+			i++
+		}
+	}
+	return spans
+}
+
+func trimServiceBotURLTrailingPunctuation(text string, start, end int) int {
+	for end > start {
+		r, size := utf8.DecodeLastRuneInString(text[start:end])
+		if !strings.ContainsRune(".,;:!?)]}", r) {
+			break
+		}
+		end -= size
+	}
+	return end
+}
+
+func serviceBotCommandByteSpans(text string) []serviceBotEntitySpan {
+	var spans []serviceBotEntitySpan
+	for i := 0; i < len(text); {
+		r, size := utf8.DecodeRuneInString(text[i:])
+		if r != '/' || !serviceBotCommandStart(text, i) {
+			i += size
+			continue
+		}
+		start := i
+		i += size
+		commandStartEnd := i
+		for i < len(text) {
+			r, size = utf8.DecodeRuneInString(text[i:])
+			if !serviceBotCommandChar(r) {
+				break
+			}
+			i += size
+		}
+		if i == commandStartEnd {
+			continue
+		}
+		if i < len(text) {
+			r, size = utf8.DecodeRuneInString(text[i:])
+			if r == '@' {
+				mentionEnd := i + size
+				for mentionEnd < len(text) {
+					r, size = utf8.DecodeRuneInString(text[mentionEnd:])
+					if !serviceBotCommandChar(r) {
+						break
+					}
+					mentionEnd += size
+				}
+				if mentionEnd > i+size {
+					i = mentionEnd
+				}
+			}
+		}
+		spans = append(spans, serviceBotEntitySpan{start: start, end: i})
+	}
+	return spans
+}
+
+func serviceBotCommandStart(text string, byteIndex int) bool {
+	if byteIndex == 0 {
+		return true
+	}
+	prev, _ := utf8.DecodeLastRuneInString(text[:byteIndex])
+	if prev == ':' || prev == '/' || prev == '@' {
+		return false
+	}
+	return !serviceBotCommandChar(prev)
+}
+
+func serviceBotCommandChar(r rune) bool {
+	return r == '_' || ('0' <= r && r <= '9') || ('A' <= r && r <= 'Z') || ('a' <= r && r <= 'z')
+}
+
+func utf16Range(text string, startByte, endByte int) (int, int) {
+	offset := 0
+	for _, r := range text[:startByte] {
+		offset += utf16RuneLen(r)
+	}
+	length := 0
+	for _, r := range text[startByte:endByte] {
+		length += utf16RuneLen(r)
+	}
+	return offset, length
+}
+
+func utf16RuneLen(r rune) int {
+	if r > 0xFFFF {
+		return 2
+	}
+	return 1
+}
+
+func serviceBotSpanOverlaps(span serviceBotEntitySpan, occupied []serviceBotEntitySpan) bool {
+	for _, other := range occupied {
+		if span.start < other.end && other.start < span.end {
+			return true
+		}
+	}
+	return false
+}

internal/app/bots/service_bot_entities_test.go

@@ -0,0 +1,60 @@
+package bots
+
+import (
+	"testing"
+
+	"telesrv/internal/domain"
+)
+
+func TestServiceBotReplyEntitiesCommandsAndURLsUseUTF16Offsets(t *testing.T) {
+	text := "🙂 Send /cancel or https://telesrv.net/addstickers/fun_pack."
+	entities := serviceBotReplyEntities(text, nil)
+
+	assertEntity := func(typ domain.MessageEntityType, offset, length int) {
+		t.Helper()
+		for _, entity := range entities {
+			if entity.Type == typ && entity.Offset == offset && entity.Length == length {
+				return
+			}
+		}
+		t.Fatalf("entities %+v missing %s at offset=%d length=%d", entities, typ, offset, length)
+	}
+
+	assertEntity(domain.MessageEntityBotCommand, 8, len("/cancel"))
+	assertEntity(domain.MessageEntityURL, 19, len("https://telesrv.net/addstickers/fun_pack"))
+}
+
+func TestServiceBotReplyEntitiesSkipCommandsInsideURLsAndExplicitEntities(t *testing.T) {
+	text := "Token: abc/def\nhttps://telesrv.net/addstickers/fun_pack\nUse /help"
+	entities := serviceBotReplyEntities(text, []domain.MessageEntity{{
+		Type:   domain.MessageEntityCode,
+		Offset: len("Token: "),
+		Length: len("abc/def"),
+	}})
+
+	commandCount := 0
+	for _, entity := range entities {
+		if entity.Type == domain.MessageEntityBotCommand {
+			commandCount++
+		}
+		if entity.Type == domain.MessageEntityBotCommand && entity.Offset < len("Token: abc/def\nhttps://telesrv.net/") {
+			t.Fatalf("unexpected command entity inside code/url: %+v in %+v", entity, entities)
+		}
+	}
+	if commandCount != 1 {
+		t.Fatalf("bot command entities = %d in %+v, want only /help", commandCount, entities)
+	}
+}
+
+func TestServiceBotReplyEntitiesIgnoreBareSlashBeforeEmoji(t *testing.T) {
+	entities := serviceBotReplyEntities("not a command /🙂 but /help is", nil)
+	commandCount := 0
+	for _, entity := range entities {
+		if entity.Type == domain.MessageEntityBotCommand {
+			commandCount++
+		}
+	}
+	if commandCount != 1 {
+		t.Fatalf("bot command entities = %d in %+v, want only /help", commandCount, entities)
+	}
+}

internal/app/bots/stickersbot_test.go

@@ -29,7 +29,12 @@ func sendMessageToStickers(t *testing.T, svc *Service, messages *memory.MessageS
 	msg.From = domain.Peer{Type: domain.PeerTypeUser, ID: owner.ID}
 	msg.Peer = domain.Peer{Type: domain.PeerTypeUser, ID: domain.StickersBotUserID}
 	svc.respondAsStickers(owner.ID, msg)
-	list, err := messages.ListByUser(context.Background(), owner.ID, domain.MessageFilter{
+	return latestStickersReply(t, messages, owner.ID).Body
+}
+
+func latestStickersReply(t *testing.T, messages *memory.MessageStore, userID int64) domain.Message {
+	t.Helper()
+	list, err := messages.ListByUser(context.Background(), userID, domain.MessageFilter{
 		HasPeer: true,
 		Peer:    domain.Peer{Type: domain.PeerTypeUser, ID: domain.StickersBotUserID},
 		Limit:   100,
@@ -44,9 +49,9 @@ func sendMessageToStickers(t *testing.T, svc *Service, messages *memory.MessageS
 		}
 	}
 	if latest.ID == 0 {
-		t.Fatalf("no Stickers reply after message %+v", msg)
+		t.Fatal("no Stickers reply")
 	}
-	return latest.Body
+	return latest
 }
 
 func newStickersBotTestService(t *testing.T) (*Service, *memory.UserStore, *memory.BotStore, *memory.MessageStore, *stickersBotFakeCreator, *stickersBotFakeInstaller) {
@@ -138,6 +143,10 @@ func TestStickersBotSystemSeedStartAndCancel(t *testing.T) {
 	if reply := sendTextToStickers(t, svc, messages, owner, "/start"); !strings.Contains(reply, "/newpack") || !strings.Contains(reply, "/newemoji") || !strings.Contains(reply, "/addsticker") {
 		t.Fatalf("/start reply = %q, want help text", reply)
 	}
+	startReply := latestStickersReply(t, messages, owner.ID)
+	assertReplyEntityText(t, startReply, domain.MessageEntityBotCommand, "/newpack")
+	assertReplyEntityText(t, startReply, domain.MessageEntityBotCommand, "/newemoji")
+	assertReplyEntityText(t, startReply, domain.MessageEntityBotCommand, "/addsticker")
 	sendTextToStickers(t, svc, messages, owner, "/newpack")
 	if reply := sendTextToStickers(t, svc, messages, owner, "/cancel"); !strings.Contains(reply, "Cancelled") {
 		t.Fatalf("/cancel reply = %q, want cancelled", reply)
@@ -190,6 +199,8 @@ func TestStickersBotPublishStickerPack(t *testing.T) {
 	if !strings.Contains(reply, "https://telesrv.net/addstickers/fresh_pack") {
 		t.Fatalf("publish reply = %q, want addstickers link", reply)
 	}
+	publishReply := latestStickersReply(t, messages, owner.ID)
+	assertReplyEntityText(t, publishReply, domain.MessageEntityURL, "https://telesrv.net/addstickers/fresh_pack")
 	if len(creator.created) != 1 {
 		t.Fatalf("created requests = %d, want 1", len(creator.created))
 	}
@@ -454,6 +465,22 @@ func botCommandExists(commands []domain.BotCommand, want string) bool {
 	return false
 }
 
+func assertReplyEntityText(t *testing.T, msg domain.Message, typ domain.MessageEntityType, want string) {
+	t.Helper()
+	for _, entity := range msg.Entities {
+		if entity.Type != typ {
+			continue
+		}
+		if entity.Offset < 0 || entity.Length < 0 || entity.Offset+entity.Length > len(msg.Body) {
+			t.Fatalf("entity %+v out of ASCII bounds for %q", entity, msg.Body)
+		}
+		if got := msg.Body[entity.Offset : entity.Offset+entity.Length]; got == want {
+			return
+		}
+	}
+	t.Fatalf("message %q entities %+v missing %s entity for %q", msg.Body, msg.Entities, typ, want)
+}
+
 type stickersBotFakeCreator struct {
 	created []domain.CreateStickerSetRequest
 	sets    []domain.StickerSet

internal/app/langpack/parser_test.go

@@ -96,3 +96,27 @@ func TestSeedDirectoryWalksClientSubdirs(t *testing.T) {
 		t.Fatalf("weba pack = %+v", pack)
 	}
 }
+
+func TestBundledAndroidPersianLangPackParses(t *testing.T) {
+	path := filepath.Join("..", "..", "..", "data", "langpack", "android", "android_fa_v59634849.strings")
+	pack, err := ParseTDesktopFile(path)
+	if err != nil {
+		t.Fatalf("parse bundled android fa pack: %v", err)
+	}
+	if pack.LangPack != "android" || pack.LangCode != "fa" || pack.Version != 59634849 {
+		t.Fatalf("pack meta = %+v, want android/fa v59634849", pack)
+	}
+	if len(pack.Strings) < 10000 {
+		t.Fatalf("strings count = %d, want full android fa pack", len(pack.Strings))
+	}
+	wantPersian := "\u0641\u0627\u0631\u0633\u06cc"
+	for _, item := range pack.Strings {
+		if item.Key == "TranslateLanguageFA" {
+			if item.Value != wantPersian {
+				t.Fatalf("TranslateLanguageFA = %q, want %q", item.Value, wantPersian)
+			}
+			return
+		}
+	}
+	t.Fatalf("TranslateLanguageFA not found in bundled android fa pack")
+}

internal/domain/channel.go

@@ -223,6 +223,15 @@ func CreatorChannelAdminRights() ChannelAdminRights {
 	}
 }
 
+// CreatorProjectionAdminRights returns the full rights clients expect for an
+// owner while preserving creator-scoped mutable flags.
+func CreatorProjectionAdminRights(rights ChannelAdminRights) ChannelAdminRights {
+	creatorRights := CreatorChannelAdminRights()
+	creatorRights.Anonymous = rights.Anonymous
+	creatorRights.ManageDirectMessages = rights.ManageDirectMessages
+	return creatorRights
+}
+
 // NormalizeFullMegagroupAdminRights fills implicit full-admin bits for megagroups.
 func NormalizeFullMegagroupAdminRights(ch Channel, rights ChannelAdminRights) ChannelAdminRights {
 	if ch.Megagroup && !ch.Broadcast &&
@@ -1235,10 +1244,16 @@ type EditChannelAdminRequest struct {
 	ChannelID   int64
 	MemberID    int64
 	AdminRights ChannelAdminRights
+	RankSet     bool
 	Rank        string
 	Date        int
 }
 
+// HasRank reports whether channels.editAdmin explicitly supplied a rank.
+func (r EditChannelAdminRequest) HasRank() bool {
+	return r.RankSet || r.Rank != ""
+}
+
 // EditChannelAdminResult describes the participant transition.
 type EditChannelAdminResult struct {
 	Channel     Channel

internal/rpc/channels_invites_members_rpc_test.go

@@ -228,6 +228,105 @@ func TestChannelsGetParticipantsHidesAnonymousAdminFromRegularMember(t *testing.
 	}
 }
 
+func TestChannelsEditAdminCreatorSelfCanToggleAnonymous(t *testing.T) {
+	ctx := context.Background()
+	userStore := memory.NewUserStore()
+	owner, _ := userStore.Create(ctx, domain.User{AccessHash: 41, Phone: "15550002171", FirstName: "Owner"})
+	admin, _ := userStore.Create(ctx, domain.User{AccessHash: 42, Phone: "15550002172", FirstName: "Admin"})
+	channelStore := memory.NewChannelStore()
+	r := New(Config{}, Deps{
+		Users:    appusers.NewService(userStore),
+		Channels: appchannels.NewService(channelStore),
+	}, zaptest.NewLogger(t), clock.System)
+	created, err := r.onMessagesCreateChat(WithUserID(ctx, owner.ID), &tg.MessagesCreateChatRequest{
+		Users: []tg.InputUserClass{&tg.InputUser{UserID: admin.ID, AccessHash: admin.AccessHash}},
+		Title: "Creator Anonymous Group",
+	})
+	if err != nil {
+		t.Fatalf("create chat: %v", err)
+	}
+	channel := created.Updates.(*tg.Updates).Chats[0].(*tg.Channel)
+	inputChannel := &tg.InputChannel{ChannelID: channel.ID, AccessHash: channel.AccessHash}
+
+	updates, err := r.onChannelsEditAdmin(WithUserID(ctx, owner.ID), &tg.ChannelsEditAdminRequest{
+		Channel: inputChannel,
+		UserID:  &tg.InputUser{UserID: owner.ID, AccessHash: owner.AccessHash},
+		AdminRights: tg.ChatAdminRights{
+			Anonymous: true,
+		},
+	})
+	if err != nil {
+		t.Fatalf("creator toggles own anonymous admin rights: %v", err)
+	}
+	var participantUpdate *tg.ChannelParticipantCreator
+	for _, update := range updates.(*tg.Updates).Updates {
+		upd, ok := update.(*tg.UpdateChannelParticipant)
+		if !ok {
+			continue
+		}
+		if creator, ok := upd.NewParticipant.(*tg.ChannelParticipantCreator); ok && creator.UserID == owner.ID {
+			participantUpdate = creator
+			break
+		}
+	}
+	if participantUpdate == nil {
+		t.Fatalf("editAdmin updates = %+v, want creator participant update", updates.(*tg.Updates).Updates)
+	}
+	if !participantUpdate.AdminRights.Anonymous || !participantUpdate.AdminRights.ChangeInfo || !participantUpdate.AdminRights.AddAdmins {
+		t.Fatalf("creator update rights = %+v, want anonymous plus full creator projection", participantUpdate.AdminRights)
+	}
+
+	participant, err := r.onChannelsGetParticipant(WithUserID(ctx, owner.ID), &tg.ChannelsGetParticipantRequest{
+		Channel:     inputChannel,
+		Participant: &tg.InputPeerUser{UserID: owner.ID, AccessHash: owner.AccessHash},
+	})
+	if err != nil {
+		t.Fatalf("get creator participant: %v", err)
+	}
+	projectedCreator, ok := participant.Participant.(*tg.ChannelParticipantCreator)
+	if !ok {
+		t.Fatalf("participant = %T, want ChannelParticipantCreator", participant.Participant)
+	}
+	if !projectedCreator.AdminRights.Anonymous || !projectedCreator.AdminRights.ChangeInfo || !projectedCreator.AdminRights.AddAdmins {
+		t.Fatalf("projected creator rights = %+v, want anonymous plus full creator projection", projectedCreator.AdminRights)
+	}
+
+	chats, err := r.onChannelsGetChannels(WithUserID(ctx, owner.ID), []tg.InputChannelClass{inputChannel})
+	if err != nil {
+		t.Fatalf("get channels: %v", err)
+	}
+	projectedChannel := chats.(*tg.MessagesChats).Chats[0].(*tg.Channel)
+	rights, ok := projectedChannel.GetAdminRights()
+	if !ok {
+		t.Fatalf("projected channel has no admin rights: %+v", projectedChannel)
+	}
+	if !rights.Anonymous || !rights.ChangeInfo || !rights.AddAdmins {
+		t.Fatalf("projected channel admin rights = %+v, want anonymous plus full creator projection", rights)
+	}
+
+	if _, err := r.onChannelsEditAdmin(WithUserID(ctx, owner.ID), &tg.ChannelsEditAdminRequest{
+		Channel: inputChannel,
+		UserID:  &tg.InputUser{UserID: admin.ID, AccessHash: admin.AccessHash},
+		AdminRights: tg.ChatAdminRights{
+			Anonymous:  true,
+			ChangeInfo: true,
+			AddAdmins:  true,
+		},
+	}); err != nil {
+		t.Fatalf("promote admin: %v", err)
+	}
+	_, err = r.onChannelsEditAdmin(WithUserID(ctx, admin.ID), &tg.ChannelsEditAdminRequest{
+		Channel: inputChannel,
+		UserID:  &tg.InputUser{UserID: owner.ID, AccessHash: owner.AccessHash},
+		AdminRights: tg.ChatAdminRights{
+			ChangeInfo: true,
+		},
+	})
+	if err == nil || !strings.Contains(err.Error(), "USER_CREATOR") {
+		t.Fatalf("admin edits creator err = %v, want USER_CREATOR", err)
+	}
+}
+
 func tgParticipantListHasUser(participants []tg.ChannelParticipantClass, userID int64) bool {
 	for _, participant := range participants {
 		for _, id := range channelParticipantUserRefs(participant) {

internal/rpc/channels_members.go

@@ -402,6 +402,7 @@ func (r *Router) onChannelsEditAdmin(ctx context.Context, req *tg.ChannelsEditAd
 		ChannelID:   channelID,
 		MemberID:    target.ID,
 		AdminRights: domainChannelAdminRights(req.AdminRights),
+		RankSet:     req.Flags.Has(0),
 		Rank:        req.Rank,
 		Date:        int(r.clock.Now().Unix()),
 	})

internal/rpc/convert_channels_core.go

@@ -780,10 +780,7 @@ func tgChatAdminRights(rights domain.ChannelAdminRights) tg.ChatAdminRights {
 }
 
 func creatorProjectionAdminRights(rights domain.ChannelAdminRights) domain.ChannelAdminRights {
-	creatorRights := domain.CreatorChannelAdminRights()
+	return domain.CreatorProjectionAdminRights(rights)
-	creatorRights.Anonymous = rights.Anonymous
-	creatorRights.ManageDirectMessages = rights.ManageDirectMessages
-	return creatorRights
 }
 
 func domainChannelAdminRights(rights tg.ChatAdminRights) domain.ChannelAdminRights {

internal/rpc/langpack.go

@@ -91,8 +91,8 @@ func (r *Router) langpackLanguages(ctx context.Context, langPack string) []tg.La
 	if langPack == "" {
 		langPack = langPackFromClient(ctx)
 	}
-	_ = langPack
+	langPack = strings.ToLower(langPack)
-	return []tg.LangPackLanguage{
+	languages := []tg.LangPackLanguage{
 		{
 			Official:        true,
 			Name:            "English",
@@ -114,6 +114,20 @@ func (r *Router) langpackLanguages(ctx context.Context, langPack string) []tg.La
 			TranslationsURL: "",
 		},
 	}
+	if langPack == "android" {
+		languages = append(languages, tg.LangPackLanguage{
+			Official:        true,
+			Rtl:             true,
+			Name:            "Persian",
+			NativeName:      "فارسی",
+			LangCode:        "fa",
+			PluralCode:      "fa",
+			StringsCount:    11002,
+			TranslatedCount: 11002,
+			TranslationsURL: "",
+		})
+	}
+	return languages
 }
 
 func langPackFromClient(ctx context.Context) string {
@@ -124,6 +138,12 @@ func langPackFromClient(ctx context.Context) string {
 	if info.LangPack != "" {
 		return info.LangPack
 	}
+	switch info.ClientType() {
+	case ClientTypeAndroid:
+		return string(ClientTypeAndroid)
+	case ClientTypeTDesktop:
+		return string(ClientTypeTDesktop)
+	}
 	client := strings.ToLower(info.DeviceModel + " " + info.SystemVersion + " " + info.AppVersion)
 	if strings.Contains(client, "android") {
 		return "android"

internal/rpc/langpack_compat_test.go

@@ -19,7 +19,9 @@ func TestLangpackGetLanguagesCurrentAndLegacy(t *testing.T) {
 		if err := (&tg.LangpackGetLanguagesRequest{LangPack: "tdesktop"}).Encode(&in); err != nil {
 			t.Fatalf("encode request: %v", err)
 		}
-		assertLangpackLanguages(t, r, context.Background(), &in)
+		langs := dispatchLangpackLanguages(t, r, context.Background(), &in)
+		assertHasLangpackLanguage(t, langs, "en")
+		assertNoLangpackLanguage(t, langs, "fa")
 	})
 
 	t.Run("legacy android no args", func(t *testing.T) {
@@ -30,7 +32,17 @@ func TestLangpackGetLanguagesCurrentAndLegacy(t *testing.T) {
 			AppVersion:  "12.7.3",
 			LangCode:    "en",
 		})
-		assertLangpackLanguages(t, r, ctx, &in)
+		langs := dispatchLangpackLanguages(t, r, ctx, &in)
+		assertHasLangpackLanguage(t, langs, "en")
+		assertHasLangpackLanguage(t, langs, "fa")
+	})
+
+	t.Run("legacy android from cached client type", func(t *testing.T) {
+		var in bin.Buffer
+		in.PutID(0x800fd57d)
+		ctx := WithClientInfo(context.Background(), ClientInfo{Type: ClientTypeAndroid})
+		langs := dispatchLangpackLanguages(t, r, ctx, &in)
+		assertHasLangpackLanguage(t, langs, "fa")
 	})
 }
 
@@ -58,6 +70,23 @@ func TestLangpackGetLanguage(t *testing.T) {
 	}
 }
 
+func TestLangpackAndroidPersianLanguage(t *testing.T) {
+	r := New(Config{DC: 2, IP: "127.0.0.1", Port: 2398}, Deps{}, zaptest.NewLogger(t), clock.System)
+
+	lang := r.langpackLanguage(context.Background(), "android", "fa")
+	if lang.LangCode != "fa" || lang.PluralCode != "fa" || lang.Name != "Persian" || lang.NativeName != "فارسی" || !lang.Rtl {
+		t.Fatalf("android fa language = %+v", lang)
+	}
+
+	languages := r.langpackLanguages(androidClientContext(), "")
+	for _, item := range languages {
+		if item.LangCode == "fa" {
+			return
+		}
+	}
+	t.Fatalf("android languages = %+v, want fa entry", languages)
+}
+
 func TestLegacyLangpackGetLangPack(t *testing.T) {
 	r := New(Config{DC: 2, IP: "127.0.0.1", Port: 2398}, Deps{}, zaptest.NewLogger(t), clock.System)
 
@@ -157,7 +186,7 @@ func TestLegacyAccountRegisterDevice(t *testing.T) {
 	}
 }
 
-func assertLangpackLanguages(t *testing.T, r *Router, ctx context.Context, in *bin.Buffer) {
+func dispatchLangpackLanguages(t *testing.T, r *Router, ctx context.Context, in *bin.Buffer) []tg.LangPackLanguage {
 	t.Helper()
 	enc, err := r.Dispatch(ctx, [8]byte{}, 0, in)
 	if err != nil {
@@ -171,8 +200,25 @@ func assertLangpackLanguages(t *testing.T, r *Router, ctx context.Context, in *b
 	if err := langs.Decode(&out); err != nil {
 		t.Fatalf("decode response: %v", err)
 	}
-	if len(langs.Elems) == 0 || langs.Elems[0].LangCode != "en" {
+	return langs.Elems
-		t.Fatalf("languages = %+v, want English entry", langs.Elems)
+}
+
+func assertHasLangpackLanguage(t *testing.T, langs []tg.LangPackLanguage, code string) {
+	t.Helper()
+	for _, lang := range langs {
+		if lang.LangCode == code {
+			return
+		}
+	}
+	t.Fatalf("languages = %+v, want %s entry", langs, code)
+}
+
+func assertNoLangpackLanguage(t *testing.T, langs []tg.LangPackLanguage, code string) {
+	t.Helper()
+	for _, lang := range langs {
+		if lang.LangCode == code {
+			t.Fatalf("languages = %+v, want no %s entry", langs, code)
+		}
 	}
 }
 

internal/store/memory/channel_helpers.go

@@ -552,7 +552,8 @@ func adminRightsSubset(want, have domain.ChannelAdminRights) bool {
 		(!want.AddAdmins || have.AddAdmins) &&
 		(!want.ManageCall || have.ManageCall) &&
 		(!want.Anonymous || have.Anonymous) &&
-		(!want.ManageRanks || have.ManageRanks)
+		(!want.ManageRanks || have.ManageRanks) &&
+		(!want.ManageDirectMessages || have.ManageDirectMessages)
 }
 
 // checkEditMemberRank validates a rank-only (member tag) edit: creator edits

internal/store/memory/channel_members.go

@@ -282,9 +282,6 @@ func (s *ChannelStore) EditChannelAdmin(_ context.Context, req domain.EditChanne
 	if !canAddChannelAdmins(actor) {
 		return domain.EditChannelAdminResult{}, domain.ErrChannelAdminRequired
 	}
-	if actor.Role != domain.ChannelRoleCreator && !adminRightsSubset(req.AdminRights, actor.AdminRights) {
-		return domain.EditChannelAdminResult{}, domain.ErrChannelRightForbidden
-	}
 	previous, ok := s.members[req.ChannelID][req.MemberID]
 	if !ok {
 		previous = domain.ChannelMember{
@@ -300,9 +297,43 @@ func (s *ChannelStore) EditChannelAdmin(_ context.Context, req domain.EditChanne
 		}
 	}
 	if previous.Role == domain.ChannelRoleCreator {
+		if req.MemberID != req.UserID || channel.CreatorUserID != req.UserID || actor.Role != domain.ChannelRoleCreator {
 			return domain.EditChannelAdminResult{}, domain.ErrChannelUserCreator
 		}
 		member := previous
+		member.Status = domain.ChannelMemberActive
+		member.LeftAt = 0
+		member.AdminRights = domain.CreatorProjectionAdminRights(req.AdminRights)
+		if req.HasRank() {
+			member.Rank = req.Rank
+		}
+		s.members[req.ChannelID][req.MemberID] = member
+		s.appendChannelAdminLogLocked(domain.ChannelAdminLogEvent{
+			ChannelID:       req.ChannelID,
+			UserID:          req.UserID,
+			Date:            req.Date,
+			Type:            domain.ChannelAdminLogParticipantPromote,
+			PrevParticipant: ptrChannelMember(previous),
+			NewParticipant:  ptrChannelMember(member),
+		})
+		s.refreshChannelCountsLocked(req.ChannelID)
+		channel = s.channels[req.ChannelID]
+		event := transientChannelParticipantEvent(channel.ID, req.UserID, previous, member, req.Date)
+		recipients := s.activeMemberIDsLocked(req.ChannelID, 0, 0)
+		recipients = append(recipients, req.MemberID)
+		return domain.EditChannelAdminResult{
+			Channel:     channel,
+			Previous:    previous,
+			Participant: member,
+			Event:       event,
+			Recipients:  recipients,
+			Date:        req.Date,
+		}, nil
+	}
+	if actor.Role != domain.ChannelRoleCreator && !adminRightsSubset(req.AdminRights, actor.AdminRights) {
+		return domain.EditChannelAdminResult{}, domain.ErrChannelRightForbidden
+	}
+	member := previous
 	member.InviterUserID = req.UserID
 	member.Status = domain.ChannelMemberActive
 	member.LeftAt = 0
@@ -312,7 +343,9 @@ func (s *ChannelStore) EditChannelAdmin(_ context.Context, req domain.EditChanne
 		}
 	}
 	member.AdminRights = domain.NormalizeFullMegagroupAdminRights(channel, req.AdminRights)
+	if req.HasRank() {
 		member.Rank = req.Rank
+	}
 	if zeroChannelAdminRights(req.AdminRights) {
 		member.Role = domain.ChannelRoleMember
 		member.Rank = ""

internal/store/memory/channel_test.go

@@ -173,6 +173,68 @@ func TestChannelCreatorLeaveTransfersOwner(t *testing.T) {
 	}
 }
 
+func TestChannelCreatorCanEditOwnAdminRights(t *testing.T) {
+	ctx := context.Background()
+	store := NewChannelStore()
+	created, err := store.CreateChannel(ctx, domain.CreateChannelRequest{
+		CreatorUserID: 1,
+		Title:         "creator self admin",
+		Megagroup:     true,
+		MemberUserIDs: []int64{2},
+		Date:          1_700_000_114,
+	})
+	if err != nil {
+		t.Fatalf("create channel: %v", err)
+	}
+
+	edited, err := store.EditChannelAdmin(ctx, domain.EditChannelAdminRequest{
+		UserID:    1,
+		ChannelID: created.Channel.ID,
+		MemberID:  1,
+		AdminRights: domain.ChannelAdminRights{
+			Anonymous: true,
+		},
+		Date: 1_700_000_115,
+	})
+	if err != nil {
+		t.Fatalf("creator edits own admin rights: %v", err)
+	}
+	if edited.Participant.Role != domain.ChannelRoleCreator || !edited.Participant.AdminRights.Anonymous || !edited.Participant.AdminRights.ChangeInfo || !edited.Participant.AdminRights.AddAdmins {
+		t.Fatalf("edited creator = %+v, want creator with anonymous plus full creator projection", edited.Participant)
+	}
+	persisted, err := store.GetParticipant(ctx, 1, created.Channel.ID, 1)
+	if err != nil {
+		t.Fatalf("get creator participant: %v", err)
+	}
+	if persisted.Role != domain.ChannelRoleCreator || !persisted.AdminRights.Anonymous || !persisted.AdminRights.ChangeInfo || !persisted.AdminRights.AddAdmins {
+		t.Fatalf("persisted creator = %+v, want creator with anonymous plus full creator projection", persisted)
+	}
+
+	if _, err := store.EditChannelAdmin(ctx, domain.EditChannelAdminRequest{
+		UserID:    1,
+		ChannelID: created.Channel.ID,
+		MemberID:  2,
+		AdminRights: domain.ChannelAdminRights{
+			ChangeInfo: true,
+			AddAdmins:  true,
+		},
+		Date: 1_700_000_116,
+	}); err != nil {
+		t.Fatalf("promote admin: %v", err)
+	}
+	if _, err := store.EditChannelAdmin(ctx, domain.EditChannelAdminRequest{
+		UserID:    2,
+		ChannelID: created.Channel.ID,
+		MemberID:  1,
+		AdminRights: domain.ChannelAdminRights{
+			ChangeInfo: true,
+		},
+		Date: 1_700_000_117,
+	}); !errors.Is(err, domain.ErrChannelUserCreator) {
+		t.Fatalf("admin edits creator err = %v, want ErrChannelUserCreator", err)
+	}
+}
+
 func TestChannelAdminAndBanDoNotAdvanceChannelPts(t *testing.T) {
 	ctx := context.Background()
 	store := NewChannelStore()

internal/store/postgres/channel_admin_integration_test.go

@@ -80,6 +80,96 @@ func TestChannelStoreEditAboutPersistsAndChecksPermission(t *testing.T) {
 	}
 }
 
+func TestChannelStoreCreatorCanEditOwnAdminRights(t *testing.T) {
+	pool := testPool(t)
+	ctx := context.Background()
+	suffix := randomSuffix(t)
+	users := NewUserStore(pool)
+	owner, err := users.Create(ctx, domain.User{
+		AccessHash: 141,
+		Phone:      "+1888" + suffix + "11",
+		FirstName:  "CreatorSelfOwner",
+	})
+	if err != nil {
+		t.Fatalf("create owner: %v", err)
+	}
+	admin, err := users.Create(ctx, domain.User{
+		AccessHash: 142,
+		Phone:      "+1888" + suffix + "12",
+		FirstName:  "CreatorSelfAdmin",
+	})
+	if err != nil {
+		t.Fatalf("create admin: %v", err)
+	}
+	var channelID int64
+	t.Cleanup(func() {
+		if channelID != 0 {
+			_, _ = pool.Exec(ctx, "DELETE FROM channels WHERE id = $1", channelID)
+		}
+		_, _ = pool.Exec(ctx, "DELETE FROM users WHERE id = ANY($1::bigint[])", []int64{owner.ID, admin.ID})
+	})
+
+	channels := NewChannelStore(pool)
+	created, err := channels.CreateChannel(ctx, domain.CreateChannelRequest{
+		CreatorUserID: owner.ID,
+		Title:         "Creator Self " + suffix,
+		Megagroup:     true,
+		MemberUserIDs: []int64{admin.ID},
+		Date:          1700000610,
+	})
+	if err != nil {
+		t.Fatalf("create channel: %v", err)
+	}
+	channelID = created.Channel.ID
+
+	edited, err := channels.EditChannelAdmin(ctx, domain.EditChannelAdminRequest{
+		UserID:    owner.ID,
+		ChannelID: channelID,
+		MemberID:  owner.ID,
+		AdminRights: domain.ChannelAdminRights{
+			Anonymous: true,
+		},
+		Date: 1700000611,
+	})
+	if err != nil {
+		t.Fatalf("creator edits own admin rights: %v", err)
+	}
+	if edited.Participant.Role != domain.ChannelRoleCreator || !edited.Participant.AdminRights.Anonymous || !edited.Participant.AdminRights.ChangeInfo || !edited.Participant.AdminRights.AddAdmins {
+		t.Fatalf("edited creator = %+v, want creator with anonymous plus full creator projection", edited.Participant)
+	}
+	persisted, err := channels.GetParticipant(ctx, owner.ID, channelID, owner.ID)
+	if err != nil {
+		t.Fatalf("get creator participant: %v", err)
+	}
+	if persisted.Role != domain.ChannelRoleCreator || !persisted.AdminRights.Anonymous || !persisted.AdminRights.ChangeInfo || !persisted.AdminRights.AddAdmins {
+		t.Fatalf("persisted creator = %+v, want creator with anonymous plus full creator projection", persisted)
+	}
+
+	if _, err := channels.EditChannelAdmin(ctx, domain.EditChannelAdminRequest{
+		UserID:    owner.ID,
+		ChannelID: channelID,
+		MemberID:  admin.ID,
+		AdminRights: domain.ChannelAdminRights{
+			ChangeInfo: true,
+			AddAdmins:  true,
+		},
+		Date: 1700000612,
+	}); err != nil {
+		t.Fatalf("promote admin: %v", err)
+	}
+	if _, err := channels.EditChannelAdmin(ctx, domain.EditChannelAdminRequest{
+		UserID:    admin.ID,
+		ChannelID: channelID,
+		MemberID:  owner.ID,
+		AdminRights: domain.ChannelAdminRights{
+			ChangeInfo: true,
+		},
+		Date: 1700000613,
+	}); !errors.Is(err, domain.ErrChannelUserCreator) {
+		t.Fatalf("admin edits creator err = %v, want ErrChannelUserCreator", err)
+	}
+}
+
 func TestChannelStoreAdminLogFiltersAndSearch(t *testing.T) {
 	pool := testPool(t)
 	ctx := context.Background()

internal/store/postgres/channel_helpers.go

@@ -783,7 +783,8 @@ func adminRightsSubset(want, have domain.ChannelAdminRights) bool {
 		(!want.AddAdmins || have.AddAdmins) &&
 		(!want.ManageCall || have.ManageCall) &&
 		(!want.Anonymous || have.Anonymous) &&
-		(!want.ManageRanks || have.ManageRanks)
+		(!want.ManageRanks || have.ManageRanks) &&
+		(!want.ManageDirectMessages || have.ManageDirectMessages)
 }
 
 // checkEditMemberRank validates a rank-only (member tag) edit: creator edits

internal/store/postgres/channel_member_admin.go

@@ -35,9 +35,6 @@ func (s *ChannelStore) EditChannelAdmin(ctx context.Context, req domain.EditChan
 	if !canAddChannelAdmins(actor) {
 		return domain.EditChannelAdminResult{}, domain.ErrChannelAdminRequired
 	}
-	if actor.Role != domain.ChannelRoleCreator && !adminRightsSubset(req.AdminRights, actor.AdminRights) {
-		return domain.EditChannelAdminResult{}, domain.ErrChannelRightForbidden
-	}
 	previous, err := s.getChannelMember(ctx, tx, req.ChannelID, req.MemberID)
 	if err != nil {
 		if !errors.Is(err, domain.ErrChannelPrivate) {
@@ -56,13 +53,52 @@ func (s *ChannelStore) EditChannelAdmin(ctx context.Context, req domain.EditChan
 		}
 	}
 	if previous.Role == domain.ChannelRoleCreator {
+		if req.MemberID != req.UserID || channel.CreatorUserID != req.UserID || actor.Role != domain.ChannelRoleCreator {
 			return domain.EditChannelAdminResult{}, domain.ErrChannelUserCreator
 		}
 		member := previous
+		member.Status = domain.ChannelMemberActive
+		member.LeftAt = 0
+		member.AdminRights = domain.CreatorProjectionAdminRights(req.AdminRights)
+		if req.HasRank() {
+			member.Rank = req.Rank
+		}
+		if err := upsertChannelMemberTx(ctx, tx, channel, member); err != nil {
+			return domain.EditChannelAdminResult{}, err
+		}
+		if err := s.insertChannelAdminLogTx(ctx, tx, domain.ChannelAdminLogEvent{
+			ChannelID:       req.ChannelID,
+			UserID:          req.UserID,
+			Date:            req.Date,
+			Type:            domain.ChannelAdminLogParticipantPromote,
+			PrevParticipant: &previous,
+			NewParticipant:  &member,
+		}); err != nil {
+			return domain.EditChannelAdminResult{}, err
+		}
+		channel, err = refreshChannelCountsTx(ctx, tx, channel)
+		if err != nil {
+			return domain.EditChannelAdminResult{}, err
+		}
+		event := transientChannelParticipantEvent(channel.ID, req.UserID, previous, member, req.Date)
+		if err := tx.Commit(ctx); err != nil {
+			return domain.EditChannelAdminResult{}, fmt.Errorf("commit edit channel creator admin: %w", err)
+		}
+		committed = true
+		recipients, _ := s.ListActiveChannelMemberIDs(ctx, req.UserID, req.ChannelID, 0)
+		recipients = append(recipients, req.MemberID)
+		return domain.EditChannelAdminResult{Channel: channel, Previous: previous, Participant: member, Event: event, Recipients: recipients, Date: req.Date}, nil
+	}
+	if actor.Role != domain.ChannelRoleCreator && !adminRightsSubset(req.AdminRights, actor.AdminRights) {
+		return domain.EditChannelAdminResult{}, domain.ErrChannelRightForbidden
+	}
+	member := previous
 	member.InviterUserID = req.UserID
 	member.Status = domain.ChannelMemberActive
 	member.LeftAt = 0
+	if req.HasRank() {
 		member.Rank = req.Rank
+	}
 	if previous.Status != domain.ChannelMemberActive {
 		if minPts := channelInitialAvailableMinPts(channel); minPts > member.AvailableMinPts {
 			member.AvailableMinPts = minPts