commands: add upgrade command

CHANGELOG.md

@@ -18,6 +18,10 @@
     old room will be assigned to one Matrix user randomly and others will get
     a new room created automatically when receiving a message in the chat or
     when using the `!tg sync-chats` command.
+    * If you want shared portals, upgrade the affected groups to supergroups.
+      You can upgrade groups using the `!tg upgrade` command, or in the
+      official apps by enabling any setting that requires a supergroup
+      (e.g. add a member tag for any admin).
   * Any migration issues should be reported in the Matrix room linked in the
     readme.
 * Notable new features include:

pkg/connector/client.go

@@ -79,6 +79,7 @@ type TelegramClient struct {
 	metadata          *UserLoginMetadata
 	client            *telegram.Client
 	updatesManager    *updates.Manager
+	dispatcher        tg.UpdateDispatcher
 	clientCtx         context.Context
 	clientCancel      context.CancelFunc
 	clientDone        *exsync.Event
@@ -183,8 +184,8 @@ func NewTelegramClient(ctx context.Context, tc *TelegramConnector, login *bridge
 		return &client, nil
 	}
 
-	dispatcher := tg.NewUpdateDispatcher()
-	dispatcher.OnFallback(client.onUpdateWrapper)
+	client.dispatcher = tg.NewUpdateDispatcher()
+	client.dispatcher.OnFallback(client.onUpdateWrapper)
 
 	client.updatesManager = updates.New(updates.Config{
 		OnNotChannelMember: client.onNotChannelMember,
@@ -205,7 +206,7 @@ func NewTelegramClient(ctx context.Context, tc *TelegramConnector, login *bridge
 
 			return resultToError(res)
 		},
-		Handler:      dispatcher,
+		Handler:      client.dispatcher,
 		Logger:       zaplog.Named("gaps"),
 		Storage:      client.ScopedStore,
 		AccessHasher: client.ScopedStore,

pkg/connector/commands.go

@@ -17,6 +17,7 @@
 package connector
 
 import (
+	"errors"
 	"slices"
 	"strings"
 
@@ -24,6 +25,8 @@ import (
 	"maunium.net/go/mautrix/bridgev2/commands"
 	"maunium.net/go/mautrix/bridgev2/networkid"
 	"maunium.net/go/mautrix/format"
+
+	"go.mau.fi/mautrix-telegram/pkg/connector/ids"
 )
 
 var cmdSyncChats = &commands.FullHandler{
@@ -58,6 +61,46 @@ func fnSyncChats(ce *commands.Event) {
 	}
 }
 
+var cmdUpgrade = &commands.FullHandler{
+	Func: fnUpgrade,
+	Name: "upgrade",
+	Help: commands.HelpMeta{
+		Section:     commands.HelpSectionChats,
+		Description: "Upgrade a minigroup to a supergroup on Telegram",
+	},
+	RequiresPortal: true,
+}
+
+func fnUpgrade(ce *commands.Event) {
+	login, _, err := ce.Portal.FindPreferredLogin(ce.Ctx, ce.User, false)
+	if errors.Is(err, bridgev2.ErrNotLoggedIn) {
+		ce.Reply("No logins found to upgrade the chat.")
+	} else if err != nil {
+		ce.Log.Err(err).Msg("Failed to find preferred login for upgrade command")
+		ce.Reply("Failed to find a login to upgrade the chat.")
+	} else if peerType, chatID, _, err := ids.ParsePortalID(ce.Portal.ID); err != nil {
+		ce.Log.Err(err).Str("portal_id", string(ce.Portal.ID)).Msg("Failed to parse portal ID for upgrade command")
+		ce.Reply("Failed to parse portal ID")
+	} else if peerType == ids.PeerTypeChannel {
+		ce.Reply("Only minigroups can be upgraded (this is already a channel/supergroup).")
+	} else if peerType == ids.PeerTypeUser {
+		ce.Reply("Only minigroups can be upgraded (this is direct chat).")
+	} else if resp, err := login.Client.(*TelegramClient).client.API().MessagesMigrateChat(ce.Ctx, chatID); err != nil {
+		ce.Log.Err(err).Int64("chat_id", chatID).Msg("Failed to upgrade chat")
+		ce.Reply("Failed to upgrade chat: %v", err)
+	} else {
+		ce.Log.Trace().Any("response", resp).Msg("Updates from chat upgrade")
+		ce.Log.Info().Int64("old_chat_id", chatID).Msg("Successfully upgraded chat")
+		ce.React("\u2705\ufe0f")
+		err = login.Client.(*TelegramClient).dispatcher.Handle(ce.Ctx, resp)
+		if err != nil {
+			ce.Log.Err(err).Msg("Failed to handle updates from chat upgrade")
+		} else {
+			ce.Log.Debug().Msg("Finished handling updates from chat upgrade")
+		}
+	}
+}
+
 var cmdEmojiPack = &commands.FullHandler{
 	Func:    fnEmojiPack,
 	Name:    "emoji-pack",

pkg/connector/connector.go

@@ -41,7 +41,7 @@ var _ bridgev2.MaxFileSizeingNetwork = (*TelegramConnector)(nil)
 func (tg *TelegramConnector) Init(bridge *bridgev2.Bridge) {
 	tg.Store = store.NewStore(bridge.DB.Database, dbutil.ZeroLogger(bridge.Log.With().Str("db_section", "telegram").Logger()))
 	tg.Bridge = bridge
-	tg.Bridge.Commands.(*commands.Processor).AddHandlers(cmdSyncChats, cmdEmojiPack)
+	tg.Bridge.Commands.(*commands.Processor).AddHandlers(cmdSyncChats, cmdEmojiPack, cmdUpgrade)
 }
 
 func (tg *TelegramConnector) Start(ctx context.Context) error {