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/session/tdesktop/dbi.go

@@ -0,0 +1,174 @@
+package tdesktop
+
+import (
+	"io"
+	"math/bits"
+
+	"github.com/go-faster/errors"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
+)
+
+//nolint:deadcode,unused,varcheck
+const (
+	dbiKey               = 0x00
+	dbiUser              = 0x01
+	dbiDcOptionOldOld    = 0x02
+	dbiChatSizeMax       = 0x03
+	dbiMutePeer          = 0x04
+	dbiSendKey           = 0x05
+	dbiAutoStart         = 0x06
+	dbiStartMinimized    = 0x07
+	dbiSoundNotify       = 0x08
+	dbiWorkMode          = 0x09
+	dbiSeenTrayTooltip   = 0x0a
+	dbiDesktopNotify     = 0x0b
+	dbiAutoUpdate        = 0x0c
+	dbiLastUpdateCheck   = 0x0d
+	dbiWindowPosition    = 0x0e
+	dbiConnectionTypeOld = 0x0f
+	// 0x10 reserved
+	dbiDefaultAttach     = 0x11
+	dbiCatsAndDogs       = 0x12
+	dbiReplaceEmojis     = 0x13
+	dbiAskDownloadPath   = 0x14
+	dbiDownloadPathOld   = 0x15
+	dbiScale             = 0x16
+	dbiEmojiTabOld       = 0x17
+	dbiRecentEmojiOldOld = 0x18
+	dbiLoggedPhoneNumber = 0x19
+	dbiMutedPeers        = 0x1a
+	// 0x1b reserved
+	dbiNotifyView              = 0x1c
+	dbiSendToMenu              = 0x1d
+	dbiCompressPastedImage     = 0x1e
+	dbiLangOld                 = 0x1f
+	dbiLangFileOld             = 0x20
+	dbiTileBackground          = 0x21
+	dbiAutoLock                = 0x22
+	dbiDialogLastPath          = 0x23
+	dbiRecentEmojiOld          = 0x24
+	dbiEmojiVariantsOld        = 0x25
+	dbiRecentStickers          = 0x26
+	dbiDcOptionOld             = 0x27
+	dbiTryIPv6                 = 0x28
+	dbiSongVolume              = 0x29
+	dbiWindowsNotificationsOld = 0x30
+	dbiIncludeMuted            = 0x31
+	dbiMegagroupSizeMax        = 0x32
+	dbiDownloadPath            = 0x33
+	dbiAutoDownload            = 0x34
+	dbiSavedGifsLimit          = 0x35
+	dbiShowingSavedGifsOld     = 0x36
+	dbiAutoPlay                = 0x37
+	dbiAdaptiveForWide         = 0x38
+	dbiHiddenPinnedMessages    = 0x39
+	dbiRecentEmoji             = 0x3a
+	dbiEmojiVariants           = 0x3b
+	dbiDialogsMode             = 0x40
+	dbiModerateMode            = 0x41
+	dbiVideoVolume             = 0x42
+	dbiStickersRecentLimit     = 0x43
+	dbiNativeNotifications     = 0x44
+	dbiNotificationsCount      = 0x45
+	dbiNotificationsCorner     = 0x46
+	dbiThemeKey                = 0x47
+	dbiDialogsWidthRatioOld    = 0x48
+	dbiUseExternalVideoPlayer  = 0x49
+	dbiDcOptions               = 0x4a
+	dbiMtpAuthorization        = 0x4b
+	dbiLastSeenWarningSeenOld  = 0x4c
+	dbiAuthSessionSettings     = 0x4d
+	dbiLangPackKey             = 0x4e
+	dbiConnectionType          = 0x4f
+	dbiStickersFavedLimit      = 0x50
+	dbiSuggestStickersByEmoji  = 0x51
+
+	dbiEncryptedWithSalt = 333
+	dbiEncrypted         = 444
+)
+
+type qtReader struct {
+	buf bin.Buffer
+}
+
+func (r *qtReader) subArray() (qtReader, error) {
+	length, err := r.readInt32()
+	if err != nil {
+		return qtReader{}, errors.Wrap(err, "read length")
+	}
+	sub := bin.Buffer{Buf: r.buf.Buf}
+	if err := r.skip(int(length)); err != nil {
+		return qtReader{}, io.ErrUnexpectedEOF
+	}
+
+	sub.Buf = sub.Buf[:length]
+	return qtReader{buf: sub}, err
+}
+
+func (r *qtReader) readUint64() (uint64, error) {
+	u, err := r.buf.Uint64()
+	return bits.ReverseBytes64(u), err
+}
+
+func (r *qtReader) readUint32() (uint32, error) {
+	u, err := r.buf.Uint32()
+	return bits.ReverseBytes32(u), err
+}
+
+func (r *qtReader) readInt32() (int32, error) {
+	v, err := r.readUint32()
+	return int32(v), err
+}
+
+func (r *qtReader) readString() (string, error) {
+	sz, err := r.readInt32()
+	if err != nil {
+		return "", err
+	}
+	size := int(sz)
+	switch {
+	case size < 0:
+		return "", &bin.InvalidLengthError{
+			Length: size,
+			Where:  "QString",
+		}
+	case size >= r.buf.Len():
+		return "", io.ErrUnexpectedEOF
+	}
+	s := string(r.buf.Buf[:size])
+	r.buf.Skip(size)
+	return s, nil
+}
+
+func (r *qtReader) readBytes() ([]byte, error) {
+	sz, err := r.readInt32()
+	if err != nil {
+		return nil, err
+	}
+	size := int(sz)
+	switch {
+	case size < 0:
+		return nil, &bin.InvalidLengthError{
+			Length: size,
+			Where:  "QString",
+		}
+	case size > r.buf.Len():
+		return nil, io.ErrUnexpectedEOF
+	}
+	s := append([]byte(nil), r.buf.Buf[:size]...)
+	r.buf.Skip(size)
+	return s, nil
+}
+
+func (r *qtReader) consumeN(target []byte, n int) error {
+	return r.buf.ConsumeN(target, n)
+}
+
+func (r *qtReader) skip(n int) error {
+	if r.buf.Len() < n {
+		return io.ErrUnexpectedEOF
+	}
+	r.buf.Skip(n)
+	return nil
+}