move gotd fork into repo. (#111)

- update to latest telegram layer
- remove some references to fields in tg.Entities that don't exist in
the schema
- originally added here:
https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e
  - referenced here
-
https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3
-
https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e

pkg/gotd/telegram/message/join.go

@@ -0,0 +1,98 @@
+package message
+
+import (
+	"context"
+
+	"github.com/go-faster/errors"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/internal/deeplink"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/message/peer"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tgerr"
+)
+
+// JoinLink joins to private chat using given link or hash.
+// Input examples:
+//
+//	t.me/+AAAAAAAAAAAAAAAA
+//	https://t.me/+AAAAAAAAAAAAAAAA
+//	t.me/joinchat/AAAAAAAAAAAAAAAA
+//	https://t.me/joinchat/AAAAAAAAAAAAAAAA
+//	tg:join?invite=AAAAAAAAAAAAAAAA
+//	tg://join?invite=AAAAAAAAAAAAAAAA
+func (s *Sender) JoinLink(ctx context.Context, link string) (tg.UpdatesClass, error) {
+	hash := link
+	if deeplink.IsDeeplinkLike(link) {
+		l, err := deeplink.Expect(link, deeplink.Join)
+		if err != nil {
+			return nil, err
+		}
+
+		hash = l.Args.Get("invite")
+	}
+
+	return s.JoinHash(ctx, hash)
+}
+
+// JoinHash joins to private chat using given hash.
+func (s *Sender) JoinHash(ctx context.Context, hash string) (tg.UpdatesClass, error) {
+	return s.importChatInvite(ctx, hash)
+}
+
+// Join joins resolved channel.
+// NB: if resolved peer is not a channel, error will be returned.
+func (b *RequestBuilder) Join(ctx context.Context) (tg.UpdatesClass, error) {
+	p, err := b.peer(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "peer")
+	}
+
+	input, ok := peer.ToInputChannel(p)
+	if !ok {
+		return nil, errors.Errorf("unexpected type %T", p)
+	}
+
+	return b.sender.joinChannel(ctx, input)
+}
+
+func (b *RequestBuilder) leave(ctx context.Context, revoke bool) (tg.UpdatesClass, error) {
+	p, err := b.peer(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "peer")
+	}
+
+	input, ok := peer.ToInputChannel(p)
+	if ok {
+		r, err := b.sender.leaveChannel(ctx, input)
+		if err != nil {
+			return nil, errors.Wrap(err, "leave channel")
+		}
+		return r, nil
+	}
+
+	chat, ok := p.(*tg.InputPeerChat)
+	if !ok {
+		return &tg.Updates{}, nil
+	}
+
+	r, err := b.sender.deleteChatUser(ctx, &tg.MessagesDeleteChatUserRequest{
+		RevokeHistory: revoke,
+		ChatID:        chat.ChatID,
+		UserID:        &tg.InputUserSelf{},
+	})
+	if err != nil {
+		// Happens if chat was deactivated.
+		if tgerr.Is(err, tg.ErrPeerIDInvalid) {
+			return &tg.Updates{}, nil
+		}
+		return nil, errors.Wrap(err, "leave chat")
+	}
+	return r, nil
+}
+
+// Leave leaves resolved peer.
+//
+// NB: if resolved peer is not a channel or chat, or chat is deactivated, empty *tg.Updates will be returned.
+func (b *RequestBuilder) Leave(ctx context.Context) (tg.UpdatesClass, error) {
+	return b.leave(ctx, false)
+}